root/third_party/libxml/src/parser.c

DEFINITIONS

1. xmlParserEntityCheck
2. xmlErrAttributeDup
3. xmlFatalErr
4. xmlFatalErrMsg
5. xmlWarningMsg
6. xmlValidityError
7. xmlFatalErrMsgInt
8. xmlFatalErrMsgStrIntStr
9. xmlFatalErrMsgStr
10. xmlErrMsgStr
11. xmlNsErr
12. xmlNsWarn
13. xmlHasFeature
14. xmlDetectSAX2
15. xmlAttrNormalizeSpace
16. xmlAttrNormalizeSpace2
17. xmlAddDefAttrs
18. xmlAddSpecialAttr
19. xmlCleanSpecialAttrCallback
20. xmlCleanSpecialAttr
21. xmlCheckLanguageID
22. nsPush
23. nsPop
24. xmlCtxtGrowAttrs
25. inputPush
26. inputPop
27. nodePush
28. nodePop
29. nameNsPush
30. nameNsPop
31. namePush
32. namePop
33. spacePush
34. spacePop
35. xmlSHRINK
36. xmlGROW
37. xmlSkipBlankChars
38. xmlPopInput
39. xmlPushInput
40. xmlParseCharRef
41. xmlParseStringCharRef
42. deallocblankswrapper
43. xmlNewBlanksWrapperInputStream
44. xmlParserHandlePEReference
45. xmlStringLenDecodeEntities
46. xmlStringDecodeEntities
47. areBlanks
48. xmlSplitQName
49. xmlIsNameStartChar
50. xmlIsNameChar
51. xmlParseNameComplex
52. xmlParseName
53. xmlParseNCNameComplex
54. xmlParseNCName
55. xmlParseNameAndCompare
56. xmlParseStringName
57. xmlParseNmtoken
58. xmlParseEntityValue
59. xmlParseAttValueComplex
60. xmlParseAttValue
61. xmlParseSystemLiteral
62. xmlParsePubidLiteral
63. xmlParseCharData
64. xmlParseCharDataComplex
65. xmlParseExternalID
66. xmlParseCommentComplex
67. xmlParseComment
68. xmlParsePITarget
69. xmlParseCatalogPI
70. xmlParsePI
71. xmlParseNotationDecl
72. xmlParseEntityDecl
73. xmlParseDefaultDecl
74. xmlParseNotationType
75. xmlParseEnumerationType
76. xmlParseEnumeratedType
77. xmlParseAttributeType
78. xmlParseAttributeListDecl
79. xmlParseElementMixedContentDecl
80. xmlParseElementChildrenContentDeclPriv
81. xmlParseElementChildrenContentDecl
82. xmlParseElementContentDecl
83. xmlParseElementDecl
84. xmlParseConditionalSections
85. xmlParseMarkupDecl
86. xmlParseTextDecl
87. xmlParseExternalSubset
88. xmlParseReference
89. xmlParseEntityRef
90. xmlParseStringEntityRef
91. xmlParsePEReference
92. xmlLoadEntityContent
93. xmlParseStringPEReference
94. xmlParseDocTypeDecl
95. xmlParseInternalSubset
96. xmlParseAttribute
97. xmlParseStartTag
98. xmlParseEndTag1
99. xmlParseEndTag
100. xmlGetNamespace
101. xmlParseQName
102. xmlParseQNameAndCompare
103. xmlParseAttValueInternal
104. xmlParseAttribute2
105. xmlParseStartTag2
106. xmlParseEndTag2
107. xmlParseCDSect
108. xmlParseContent
109. xmlParseElement
110. xmlParseVersionNum
111. xmlParseVersionInfo
112. xmlParseEncName
113. xmlParseEncodingDecl
114. xmlParseSDDecl
115. xmlParseXMLDecl
116. xmlParseMisc
117. xmlParseDocument
118. xmlParseExtParsedEnt
119. xmlParseLookupSequence
120. xmlParseGetLasts
121. xmlCheckCdataPush
122. xmlParseTryOrFinish
123. xmlParseChunk
124. xmlCreatePushParserCtxt
125. xmlStopParser
126. xmlCreateIOParserCtxt
127. xmlIOParseDTD
128. xmlSAXParseDTD
129. xmlParseDTD
130. xmlParseCtxtExternalEntity
131. xmlParseExternalEntityPrivate
132. xmlParseExternalEntity
133. xmlParseBalancedChunkMemory
134. xmlParseBalancedChunkMemoryInternal
135. xmlParseInNodeContext
136. xmlParseBalancedChunkMemoryRecover
137. xmlSAXParseEntity
138. xmlParseEntity
139. xmlCreateEntityParserCtxtInternal
140. xmlCreateEntityParserCtxt
141. xmlCreateURLParserCtxt
142. xmlCreateFileParserCtxt
143. xmlSAXParseFileWithData
144. xmlSAXParseFile
145. xmlRecoverDoc
146. xmlParseFile
147. xmlRecoverFile
148. xmlSetupParserForBuffer
149. xmlSAXUserParseFile
150. xmlCreateMemoryParserCtxt
151. xmlSAXParseMemoryWithData
152. xmlSAXParseMemory
153. xmlParseMemory
154. xmlRecoverMemory
155. xmlSAXUserParseMemory
156. xmlCreateDocParserCtxt
157. xmlSAXParseDoc
158. xmlParseDoc
159. xmlAddEntityReference
160. xmlSetEntityReferenceFunc
161. xmlInitParser
162. xmlCleanupParser
163. xmlCtxtReset
164. xmlCtxtResetPush
165. xmlCtxtUseOptionsInternal
166. xmlCtxtUseOptions
167. xmlDoRead
168. xmlReadDoc
169. xmlReadFile
170. xmlReadMemory
171. xmlReadFd
172. xmlReadIO
173. xmlCtxtReadDoc
174. xmlCtxtReadFile
175. xmlCtxtReadMemory
176. xmlCtxtReadFd
177. xmlCtxtReadIO

/*
 * parser.c : an XML 1.0 parser, namespaces and validity support are mostly
 *            implemented on top of the SAX interfaces
 *
 * References:
 *   The XML specification:
 *     http://www.w3.org/TR/REC-xml
 *   Original 1.0 version:
 *     http://www.w3.org/TR/1998/REC-xml-19980210
 *   XML second edition working draft
 *     http://www.w3.org/TR/2000/WD-xml-2e-20000814
 *
 * Okay this is a big file, the parser core is around 7000 lines, then it
 * is followed by the progressive parser top routines, then the various
 * high level APIs to call the parser and a few miscellaneous functions.
 * A number of helper functions and deprecated ones have been moved to
 * parserInternals.c to reduce this file size.
 * As much as possible the functions are associated with their relative
 * production in the XML specification. A few productions defining the
 * different ranges of character are actually implanted either in 
 * parserInternals.h or parserInternals.c
 * The DOM tree build is realized from the default SAX callbacks in
 * the module SAX.c.
 * The routines doing the validation checks are in valid.c and called either
 * from the SAX callbacks or as standalone functions using a preparsed
 * document.
 *
 * See Copyright for the status of this software.
 *
 * daniel@veillard.com
 */

#define IN_LIBXML
#include "libxml.h"

#if defined(WIN32) && !defined (__CYGWIN__)
#define XML_DIR_SEP '\\'
#else
#define XML_DIR_SEP '/'
#endif

#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <libxml/xmlmemory.h>
#include <libxml/threads.h>
#include <libxml/globals.h>
#include <libxml/tree.h>
#include <libxml/parser.h>
#include <libxml/parserInternals.h>
#include <libxml/valid.h>
#include <libxml/entities.h>
#include <libxml/xmlerror.h>
#include <libxml/encoding.h>
#include <libxml/xmlIO.h>
#include <libxml/uri.h>
#ifdef LIBXML_CATALOG_ENABLED
#include <libxml/catalog.h>
#endif
#ifdef LIBXML_SCHEMAS_ENABLED
#include <libxml/xmlschemastypes.h>
#include <libxml/relaxng.h>
#endif
#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#endif

static void
xmlFatalErr(xmlParserCtxtPtr ctxt, xmlParserErrors error, const char *info);

static xmlParserCtxtPtr
xmlCreateEntityParserCtxtInternal(const xmlChar *URL, const xmlChar *ID,
                          const xmlChar *base, xmlParserCtxtPtr pctx);

/************************************************************************
 *                                                                      *
 *      Arbitrary limits set in the parser. See XML_PARSE_HUGE          *
 *                                                                      *
 ************************************************************************/

#define XML_PARSER_BIG_ENTITY 1000
#define XML_PARSER_LOT_ENTITY 5000

/*
 * XML_PARSER_NON_LINEAR is the threshold where the ratio of parsed entity
 *    replacement over the size in byte of the input indicates that you have
 *    and eponential behaviour. A value of 10 correspond to at least 3 entity
 *    replacement per byte of input.
 */
#define XML_PARSER_NON_LINEAR 10

/*
 * xmlParserEntityCheck
 *
 * Function to check non-linear entity expansion behaviour
 * This is here to detect and stop exponential linear entity expansion
 * This is not a limitation of the parser but a safety
 * boundary feature. It can be disabled with the XML_PARSE_HUGE
 * parser option.
 */
static int
xmlParserEntityCheck(xmlParserCtxtPtr ctxt, unsigned long size,
                     xmlEntityPtr ent)
{
    unsigned long consumed = 0;

    if ((ctxt == NULL) || (ctxt->options & XML_PARSE_HUGE))
        return (0);
    if (ctxt->lastError.code == XML_ERR_ENTITY_LOOP)
        return (1);
    if (size != 0) {
        /*
         * Do the check based on the replacement size of the entity
         */
        if (size < XML_PARSER_BIG_ENTITY)
            return(0);

        /*
         * A limit on the amount of text data reasonably used
         */
        if (ctxt->input != NULL) {
            consumed = ctxt->input->consumed +
                (ctxt->input->cur - ctxt->input->base);
        }
        consumed += ctxt->sizeentities;

        if ((size < XML_PARSER_NON_LINEAR * consumed) &&
            (ctxt->nbentities * 3 < XML_PARSER_NON_LINEAR * consumed))
            return (0);
    } else if (ent != NULL) {
        /*
         * use the number of parsed entities in the replacement
         */
        size = ent->checked;

        /*
         * The amount of data parsed counting entities size only once
         */
        if (ctxt->input != NULL) {
            consumed = ctxt->input->consumed +
                (ctxt->input->cur - ctxt->input->base);
        }
        consumed += ctxt->sizeentities;

        /*
         * Check the density of entities for the amount of data
         * knowing an entity reference will take at least 3 bytes
         */
        if (size * 3 < consumed * XML_PARSER_NON_LINEAR)
            return (0);
    } else {
        /*
         * strange we got no data for checking just return
         */
        return (0);
    }

    xmlFatalErr(ctxt, XML_ERR_ENTITY_LOOP, NULL);
    return (1);
}

/**
 * xmlParserMaxDepth:
 *
 * arbitrary depth limit for the XML documents that we allow to
 * process. This is not a limitation of the parser but a safety
 * boundary feature. It can be disabled with the XML_PARSE_HUGE
 * parser option.
 */
unsigned int xmlParserMaxDepth = 256;



#define SAX2 1
#define XML_PARSER_BIG_BUFFER_SIZE 300
#define XML_PARSER_BUFFER_SIZE 100
#define SAX_COMPAT_MODE BAD_CAST "SAX compatibility mode document"

/*
 * List of XML prefixed PI allowed by W3C specs
 */

static const char *xmlW3CPIs[] = {
    "xml-stylesheet",
    NULL
};


/* DEPR void xmlParserHandleReference(xmlParserCtxtPtr ctxt); */
static xmlEntityPtr xmlParseStringPEReference(xmlParserCtxtPtr ctxt,
                                              const xmlChar **str);

static xmlParserErrors
xmlParseExternalEntityPrivate(xmlDocPtr doc, xmlParserCtxtPtr oldctxt,
                      xmlSAXHandlerPtr sax,
                      void *user_data, int depth, const xmlChar *URL,
                      const xmlChar *ID, xmlNodePtr *list);

static int
xmlCtxtUseOptionsInternal(xmlParserCtxtPtr ctxt, int options,
                          const char *encoding);
#ifdef LIBXML_LEGACY_ENABLED
static void
xmlAddEntityReference(xmlEntityPtr ent, xmlNodePtr firstNode,
                      xmlNodePtr lastNode);
#endif /* LIBXML_LEGACY_ENABLED */

static xmlParserErrors
xmlParseBalancedChunkMemoryInternal(xmlParserCtxtPtr oldctxt,
                      const xmlChar *string, void *user_data, xmlNodePtr *lst);

static int
xmlLoadEntityContent(xmlParserCtxtPtr ctxt, xmlEntityPtr entity);

/************************************************************************
 *                                                                      *
 *              Some factorized error routines                          *
 *                                                                      *
 ************************************************************************/

/**
 * xmlErrAttributeDup:
 * @ctxt:  an XML parser context
 * @prefix:  the attribute prefix
 * @localname:  the attribute localname
 *
 * Handle a redefinition of attribute error
 */
static void
xmlErrAttributeDup(xmlParserCtxtPtr ctxt, const xmlChar * prefix,
                   const xmlChar * localname)
{
    if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
        (ctxt->instate == XML_PARSER_EOF))
        return;
    if (ctxt != NULL)
        ctxt->errNo = XML_ERR_ATTRIBUTE_REDEFINED;

    if (prefix == NULL)
        __xmlRaiseError(NULL, NULL, NULL, ctxt, NULL, XML_FROM_PARSER,
                        XML_ERR_ATTRIBUTE_REDEFINED, XML_ERR_FATAL, NULL, 0,
                        (const char *) localname, NULL, NULL, 0, 0,
                        "Attribute %s redefined\n", localname);
    else
        __xmlRaiseError(NULL, NULL, NULL, ctxt, NULL, XML_FROM_PARSER,
                        XML_ERR_ATTRIBUTE_REDEFINED, XML_ERR_FATAL, NULL, 0,
                        (const char *) prefix, (const char *) localname,
                        NULL, 0, 0, "Attribute %s:%s redefined\n", prefix,
                        localname);
    if (ctxt != NULL) {
        ctxt->wellFormed = 0;
        if (ctxt->recovery == 0)
            ctxt->disableSAX = 1;
    }
}

/**
 * xmlFatalErr:
 * @ctxt:  an XML parser context
 * @error:  the error number
 * @extra:  extra information string
 *
 * Handle a fatal parser error, i.e. violating Well-Formedness constraints
 */
static void
xmlFatalErr(xmlParserCtxtPtr ctxt, xmlParserErrors error, const char *info)
{
    const char *errmsg;

    if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
        (ctxt->instate == XML_PARSER_EOF))
        return;
    switch (error) {
        case XML_ERR_INVALID_HEX_CHARREF:
            errmsg = "CharRef: invalid hexadecimal value\n";
            break;
        case XML_ERR_INVALID_DEC_CHARREF:
            errmsg = "CharRef: invalid decimal value\n";
            break;
        case XML_ERR_INVALID_CHARREF:
            errmsg = "CharRef: invalid value\n";
            break;
        case XML_ERR_INTERNAL_ERROR:
            errmsg = "internal error";
            break;
        case XML_ERR_PEREF_AT_EOF:
            errmsg = "PEReference at end of document\n";
            break;
        case XML_ERR_PEREF_IN_PROLOG:
            errmsg = "PEReference in prolog\n";
            break;
        case XML_ERR_PEREF_IN_EPILOG:
            errmsg = "PEReference in epilog\n";
            break;
        case XML_ERR_PEREF_NO_NAME:
            errmsg = "PEReference: no name\n";
            break;
        case XML_ERR_PEREF_SEMICOL_MISSING:
            errmsg = "PEReference: expecting ';'\n";
            break;
        case XML_ERR_ENTITY_LOOP:
            errmsg = "Detected an entity reference loop\n";
            break;
        case XML_ERR_ENTITY_NOT_STARTED:
            errmsg = "EntityValue: \" or ' expected\n";
            break;
        case XML_ERR_ENTITY_PE_INTERNAL:
            errmsg = "PEReferences forbidden in internal subset\n";
            break;
        case XML_ERR_ENTITY_NOT_FINISHED:
            errmsg = "EntityValue: \" or ' expected\n";
            break;
        case XML_ERR_ATTRIBUTE_NOT_STARTED:
            errmsg = "AttValue: \" or ' expected\n";
            break;
        case XML_ERR_LT_IN_ATTRIBUTE:
            errmsg = "Unescaped '<' not allowed in attributes values\n";
            break;
        case XML_ERR_LITERAL_NOT_STARTED:
            errmsg = "SystemLiteral \" or ' expected\n";
            break;
        case XML_ERR_LITERAL_NOT_FINISHED:
            errmsg = "Unfinished System or Public ID \" or ' expected\n";
            break;
        case XML_ERR_MISPLACED_CDATA_END:
            errmsg = "Sequence ']]>' not allowed in content\n";
            break;
        case XML_ERR_URI_REQUIRED:
            errmsg = "SYSTEM or PUBLIC, the URI is missing\n";
            break;
        case XML_ERR_PUBID_REQUIRED:
            errmsg = "PUBLIC, the Public Identifier is missing\n";
            break;
        case XML_ERR_HYPHEN_IN_COMMENT:
            errmsg = "Comment must not contain '--' (double-hyphen)\n";
            break;
        case XML_ERR_PI_NOT_STARTED:
            errmsg = "xmlParsePI : no target name\n";
            break;
        case XML_ERR_RESERVED_XML_NAME:
            errmsg = "Invalid PI name\n";
            break;
        case XML_ERR_NOTATION_NOT_STARTED:
            errmsg = "NOTATION: Name expected here\n";
            break;
        case XML_ERR_NOTATION_NOT_FINISHED:
            errmsg = "'>' required to close NOTATION declaration\n";
            break;
        case XML_ERR_VALUE_REQUIRED:
            errmsg = "Entity value required\n";
            break;
        case XML_ERR_URI_FRAGMENT:
            errmsg = "Fragment not allowed";
            break;
        case XML_ERR_ATTLIST_NOT_STARTED:
            errmsg = "'(' required to start ATTLIST enumeration\n";
            break;
        case XML_ERR_NMTOKEN_REQUIRED:
            errmsg = "NmToken expected in ATTLIST enumeration\n";
            break;
        case XML_ERR_ATTLIST_NOT_FINISHED:
            errmsg = "')' required to finish ATTLIST enumeration\n";
            break;
        case XML_ERR_MIXED_NOT_STARTED:
            errmsg = "MixedContentDecl : '|' or ')*' expected\n";
            break;
        case XML_ERR_PCDATA_REQUIRED:
            errmsg = "MixedContentDecl : '#PCDATA' expected\n";
            break;
        case XML_ERR_ELEMCONTENT_NOT_STARTED:
            errmsg = "ContentDecl : Name or '(' expected\n";
            break;
        case XML_ERR_ELEMCONTENT_NOT_FINISHED:
            errmsg = "ContentDecl : ',' '|' or ')' expected\n";
            break;
        case XML_ERR_PEREF_IN_INT_SUBSET:
            errmsg =
                "PEReference: forbidden within markup decl in internal subset\n";
            break;
        case XML_ERR_GT_REQUIRED:
            errmsg = "expected '>'\n";
            break;
        case XML_ERR_CONDSEC_INVALID:
            errmsg = "XML conditional section '[' expected\n";
            break;
        case XML_ERR_EXT_SUBSET_NOT_FINISHED:
            errmsg = "Content error in the external subset\n";
            break;
        case XML_ERR_CONDSEC_INVALID_KEYWORD:
            errmsg =
                "conditional section INCLUDE or IGNORE keyword expected\n";
            break;
        case XML_ERR_CONDSEC_NOT_FINISHED:
            errmsg = "XML conditional section not closed\n";
            break;
        case XML_ERR_XMLDECL_NOT_STARTED:
            errmsg = "Text declaration '<?xml' required\n";
            break;
        case XML_ERR_XMLDECL_NOT_FINISHED:
            errmsg = "parsing XML declaration: '?>' expected\n";
            break;
        case XML_ERR_EXT_ENTITY_STANDALONE:
            errmsg = "external parsed entities cannot be standalone\n";
            break;
        case XML_ERR_ENTITYREF_SEMICOL_MISSING:
            errmsg = "EntityRef: expecting ';'\n";
            break;
        case XML_ERR_DOCTYPE_NOT_FINISHED:
            errmsg = "DOCTYPE improperly terminated\n";
            break;
        case XML_ERR_LTSLASH_REQUIRED:
            errmsg = "EndTag: '</' not found\n";
            break;
        case XML_ERR_EQUAL_REQUIRED:
            errmsg = "expected '='\n";
            break;
        case XML_ERR_STRING_NOT_CLOSED:
            errmsg = "String not closed expecting \" or '\n";
            break;
        case XML_ERR_STRING_NOT_STARTED:
            errmsg = "String not started expecting ' or \"\n";
            break;
        case XML_ERR_ENCODING_NAME:
            errmsg = "Invalid XML encoding name\n";
            break;
        case XML_ERR_STANDALONE_VALUE:
            errmsg = "standalone accepts only 'yes' or 'no'\n";
            break;
        case XML_ERR_DOCUMENT_EMPTY:
            errmsg = "Document is empty\n";
            break;
        case XML_ERR_DOCUMENT_END:
            errmsg = "Extra content at the end of the document\n";
            break;
        case XML_ERR_NOT_WELL_BALANCED:
            errmsg = "chunk is not well balanced\n";
            break;
        case XML_ERR_EXTRA_CONTENT:
            errmsg = "extra content at the end of well balanced chunk\n";
            break;
        case XML_ERR_VERSION_MISSING:
            errmsg = "Malformed declaration expecting version\n";
            break;
#if 0
        case:
            errmsg = "\n";
            break;
#endif
        default:
            errmsg = "Unregistered error message\n";
    }
    if (ctxt != NULL)
        ctxt->errNo = error;
    __xmlRaiseError(NULL, NULL, NULL, ctxt, NULL, XML_FROM_PARSER, error,
                    XML_ERR_FATAL, NULL, 0, info, NULL, NULL, 0, 0, errmsg,
                    info);
    if (ctxt != NULL) {
        ctxt->wellFormed = 0;
        if (ctxt->recovery == 0)
            ctxt->disableSAX = 1;
    }
}

/**
 * xmlFatalErrMsg:
 * @ctxt:  an XML parser context
 * @error:  the error number
 * @msg:  the error message
 *
 * Handle a fatal parser error, i.e. violating Well-Formedness constraints
 */
static void
xmlFatalErrMsg(xmlParserCtxtPtr ctxt, xmlParserErrors error,
               const char *msg)
{
    if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
        (ctxt->instate == XML_PARSER_EOF))
        return;
    if (ctxt != NULL)
        ctxt->errNo = error;
    __xmlRaiseError(NULL, NULL, NULL, ctxt, NULL, XML_FROM_PARSER, error,
                    XML_ERR_FATAL, NULL, 0, NULL, NULL, NULL, 0, 0, "%s", msg);
    if (ctxt != NULL) {
        ctxt->wellFormed = 0;
        if (ctxt->recovery == 0)
            ctxt->disableSAX = 1;
    }
}

/**
 * xmlWarningMsg:
 * @ctxt:  an XML parser context
 * @error:  the error number
 * @msg:  the error message
 * @str1:  extra data
 * @str2:  extra data
 *
 * Handle a warning.
 */
static void
xmlWarningMsg(xmlParserCtxtPtr ctxt, xmlParserErrors error,
              const char *msg, const xmlChar *str1, const xmlChar *str2)
{
    xmlStructuredErrorFunc schannel = NULL;

    if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
        (ctxt->instate == XML_PARSER_EOF))
        return;
    if ((ctxt != NULL) && (ctxt->sax != NULL) &&
        (ctxt->sax->initialized == XML_SAX2_MAGIC))
        schannel = ctxt->sax->serror;
    if (ctxt != NULL) {
        __xmlRaiseError(schannel,
                    (ctxt->sax) ? ctxt->sax->warning : NULL,
                    ctxt->userData,
                    ctxt, NULL, XML_FROM_PARSER, error,
                    XML_ERR_WARNING, NULL, 0,
                    (const char *) str1, (const char *) str2, NULL, 0, 0,
                    msg, (const char *) str1, (const char *) str2);
    } else {
        __xmlRaiseError(schannel, NULL, NULL,
                    ctxt, NULL, XML_FROM_PARSER, error,
                    XML_ERR_WARNING, NULL, 0,
                    (const char *) str1, (const char *) str2, NULL, 0, 0,
                    msg, (const char *) str1, (const char *) str2);
    }
}

/**
 * xmlValidityError:
 * @ctxt:  an XML parser context
 * @error:  the error number
 * @msg:  the error message
 * @str1:  extra data
 *
 * Handle a validity error.
 */
static void
xmlValidityError(xmlParserCtxtPtr ctxt, xmlParserErrors error,
              const char *msg, const xmlChar *str1, const xmlChar *str2)
{
    xmlStructuredErrorFunc schannel = NULL;

    if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
        (ctxt->instate == XML_PARSER_EOF))
        return;
    if (ctxt != NULL) {
        ctxt->errNo = error;
        if ((ctxt->sax != NULL) && (ctxt->sax->initialized == XML_SAX2_MAGIC))
            schannel = ctxt->sax->serror;
    }
    if (ctxt != NULL) {
        __xmlRaiseError(schannel,
                    ctxt->vctxt.error, ctxt->vctxt.userData,
                    ctxt, NULL, XML_FROM_DTD, error,
                    XML_ERR_ERROR, NULL, 0, (const char *) str1,
                    (const char *) str2, NULL, 0, 0,
                    msg, (const char *) str1, (const char *) str2);
        ctxt->valid = 0;
    } else {
        __xmlRaiseError(schannel, NULL, NULL,
                    ctxt, NULL, XML_FROM_DTD, error,
                    XML_ERR_ERROR, NULL, 0, (const char *) str1,
                    (const char *) str2, NULL, 0, 0,
                    msg, (const char *) str1, (const char *) str2);
    }
}

/**
 * xmlFatalErrMsgInt:
 * @ctxt:  an XML parser context
 * @error:  the error number
 * @msg:  the error message
 * @val:  an integer value
 *
 * Handle a fatal parser error, i.e. violating Well-Formedness constraints
 */
static void
xmlFatalErrMsgInt(xmlParserCtxtPtr ctxt, xmlParserErrors error,
                  const char *msg, int val)
{
    if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
        (ctxt->instate == XML_PARSER_EOF))
        return;
    if (ctxt != NULL)
        ctxt->errNo = error;
    __xmlRaiseError(NULL, NULL, NULL,
                    ctxt, NULL, XML_FROM_PARSER, error, XML_ERR_FATAL,
                    NULL, 0, NULL, NULL, NULL, val, 0, msg, val);
    if (ctxt != NULL) {
        ctxt->wellFormed = 0;
        if (ctxt->recovery == 0)
            ctxt->disableSAX = 1;
    }
}

/**
 * xmlFatalErrMsgStrIntStr:
 * @ctxt:  an XML parser context
 * @error:  the error number
 * @msg:  the error message
 * @str1:  an string info
 * @val:  an integer value
 * @str2:  an string info
 *
 * Handle a fatal parser error, i.e. violating Well-Formedness constraints
 */
static void
xmlFatalErrMsgStrIntStr(xmlParserCtxtPtr ctxt, xmlParserErrors error,
                  const char *msg, const xmlChar *str1, int val, 
                  const xmlChar *str2)
{
    if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
        (ctxt->instate == XML_PARSER_EOF))
        return;
    if (ctxt != NULL)
        ctxt->errNo = error;
    __xmlRaiseError(NULL, NULL, NULL,
                    ctxt, NULL, XML_FROM_PARSER, error, XML_ERR_FATAL,
                    NULL, 0, (const char *) str1, (const char *) str2,
                    NULL, val, 0, msg, str1, val, str2);
    if (ctxt != NULL) {
        ctxt->wellFormed = 0;
        if (ctxt->recovery == 0)
            ctxt->disableSAX = 1;
    }
}

/**
 * xmlFatalErrMsgStr:
 * @ctxt:  an XML parser context
 * @error:  the error number
 * @msg:  the error message
 * @val:  a string value
 *
 * Handle a fatal parser error, i.e. violating Well-Formedness constraints
 */
static void
xmlFatalErrMsgStr(xmlParserCtxtPtr ctxt, xmlParserErrors error,
                  const char *msg, const xmlChar * val)
{
    if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
        (ctxt->instate == XML_PARSER_EOF))
        return;
    if (ctxt != NULL)
        ctxt->errNo = error;
    __xmlRaiseError(NULL, NULL, NULL, ctxt, NULL,
                    XML_FROM_PARSER, error, XML_ERR_FATAL,
                    NULL, 0, (const char *) val, NULL, NULL, 0, 0, msg,
                    val);
    if (ctxt != NULL) {
        ctxt->wellFormed = 0;
        if (ctxt->recovery == 0)
            ctxt->disableSAX = 1;
    }
}

/**
 * xmlErrMsgStr:
 * @ctxt:  an XML parser context
 * @error:  the error number
 * @msg:  the error message
 * @val:  a string value
 *
 * Handle a non fatal parser error
 */
static void
xmlErrMsgStr(xmlParserCtxtPtr ctxt, xmlParserErrors error,
                  const char *msg, const xmlChar * val)
{
    if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
        (ctxt->instate == XML_PARSER_EOF))
        return;
    if (ctxt != NULL)
        ctxt->errNo = error;
    __xmlRaiseError(NULL, NULL, NULL, ctxt, NULL,
                    XML_FROM_PARSER, error, XML_ERR_ERROR,
                    NULL, 0, (const char *) val, NULL, NULL, 0, 0, msg,
                    val);
}

/**
 * xmlNsErr:
 * @ctxt:  an XML parser context
 * @error:  the error number
 * @msg:  the message
 * @info1:  extra information string
 * @info2:  extra information string
 *
 * Handle a fatal parser error, i.e. violating Well-Formedness constraints
 */
static void
xmlNsErr(xmlParserCtxtPtr ctxt, xmlParserErrors error,
         const char *msg,
         const xmlChar * info1, const xmlChar * info2,
         const xmlChar * info3)
{
    if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
        (ctxt->instate == XML_PARSER_EOF))
        return;
    if (ctxt != NULL)
        ctxt->errNo = error;
    __xmlRaiseError(NULL, NULL, NULL, ctxt, NULL, XML_FROM_NAMESPACE, error,
                    XML_ERR_ERROR, NULL, 0, (const char *) info1,
                    (const char *) info2, (const char *) info3, 0, 0, msg,
                    info1, info2, info3);
    if (ctxt != NULL)
        ctxt->nsWellFormed = 0;
}

/**
 * xmlNsWarn
 * @ctxt:  an XML parser context
 * @error:  the error number
 * @msg:  the message
 * @info1:  extra information string
 * @info2:  extra information string
 *
 * Handle a fatal parser error, i.e. violating Well-Formedness constraints
 */
static void
xmlNsWarn(xmlParserCtxtPtr ctxt, xmlParserErrors error,
         const char *msg,
         const xmlChar * info1, const xmlChar * info2,
         const xmlChar * info3)
{
    if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
        (ctxt->instate == XML_PARSER_EOF))
        return;
    __xmlRaiseError(NULL, NULL, NULL, ctxt, NULL, XML_FROM_NAMESPACE, error,
                    XML_ERR_WARNING, NULL, 0, (const char *) info1,
                    (const char *) info2, (const char *) info3, 0, 0, msg,
                    info1, info2, info3);
}

/************************************************************************
 *                                                                      *
 *              Library wide options                                    *
 *                                                                      *
 ************************************************************************/

/**
  * xmlHasFeature:
  * @feature: the feature to be examined
  *
  * Examines if the library has been compiled with a given feature.
  *
  * Returns a non-zero value if the feature exist, otherwise zero.
  * Returns zero (0) if the feature does not exist or an unknown
  * unknown feature is requested, non-zero otherwise.
  */
int
xmlHasFeature(xmlFeature feature)
{
    switch (feature) {
        case XML_WITH_THREAD:
#ifdef LIBXML_THREAD_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_TREE:
#ifdef LIBXML_TREE_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_OUTPUT:
#ifdef LIBXML_OUTPUT_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_PUSH:
#ifdef LIBXML_PUSH_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_READER:
#ifdef LIBXML_READER_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_PATTERN:
#ifdef LIBXML_PATTERN_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_WRITER:
#ifdef LIBXML_WRITER_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_SAX1:
#ifdef LIBXML_SAX1_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_FTP:
#ifdef LIBXML_FTP_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_HTTP:
#ifdef LIBXML_HTTP_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_VALID:
#ifdef LIBXML_VALID_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_HTML:
#ifdef LIBXML_HTML_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_LEGACY:
#ifdef LIBXML_LEGACY_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_C14N:
#ifdef LIBXML_C14N_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_CATALOG:
#ifdef LIBXML_CATALOG_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_XPATH:
#ifdef LIBXML_XPATH_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_XPTR:
#ifdef LIBXML_XPTR_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_XINCLUDE:
#ifdef LIBXML_XINCLUDE_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_ICONV:
#ifdef LIBXML_ICONV_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_ISO8859X:
#ifdef LIBXML_ISO8859X_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_UNICODE:
#ifdef LIBXML_UNICODE_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_REGEXP:
#ifdef LIBXML_REGEXP_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_AUTOMATA:
#ifdef LIBXML_AUTOMATA_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_EXPR:
#ifdef LIBXML_EXPR_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_SCHEMAS:
#ifdef LIBXML_SCHEMAS_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_SCHEMATRON:
#ifdef LIBXML_SCHEMATRON_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_MODULES:
#ifdef LIBXML_MODULES_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_DEBUG:
#ifdef LIBXML_DEBUG_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_DEBUG_MEM:
#ifdef DEBUG_MEMORY_LOCATION
            return(1);
#else
            return(0);
#endif
        case XML_WITH_DEBUG_RUN:
#ifdef LIBXML_DEBUG_RUNTIME
            return(1);
#else
            return(0);
#endif
        case XML_WITH_ZLIB:
#ifdef LIBXML_ZLIB_ENABLED
            return(1);
#else
            return(0);
#endif
        case XML_WITH_ICU:
#ifdef LIBXML_ICU_ENABLED
            return(1);
#else
            return(0);
#endif
        default:
            break;
     }
     return(0);
}

/************************************************************************
 *                                                                      *
 *              SAX2 defaulted attributes handling                      *
 *                                                                      *
 ************************************************************************/

/**
 * xmlDetectSAX2:
 * @ctxt:  an XML parser context
 *
 * Do the SAX2 detection and specific intialization
 */
static void
xmlDetectSAX2(xmlParserCtxtPtr ctxt) {
    if (ctxt == NULL) return;
#ifdef LIBXML_SAX1_ENABLED
    if ((ctxt->sax) &&  (ctxt->sax->initialized == XML_SAX2_MAGIC) &&
        ((ctxt->sax->startElementNs != NULL) ||
         (ctxt->sax->endElementNs != NULL))) ctxt->sax2 = 1;
#else
    ctxt->sax2 = 1;
#endif /* LIBXML_SAX1_ENABLED */

    ctxt->str_xml = xmlDictLookup(ctxt->dict, BAD_CAST "xml", 3);
    ctxt->str_xmlns = xmlDictLookup(ctxt->dict, BAD_CAST "xmlns", 5);
    ctxt->str_xml_ns = xmlDictLookup(ctxt->dict, XML_XML_NAMESPACE, 36);
    if ((ctxt->str_xml==NULL) || (ctxt->str_xmlns==NULL) || 
                (ctxt->str_xml_ns == NULL)) {
        xmlErrMemory(ctxt, NULL);
    }
}

typedef struct _xmlDefAttrs xmlDefAttrs;
typedef xmlDefAttrs *xmlDefAttrsPtr;
struct _xmlDefAttrs {
    int nbAttrs;        /* number of defaulted attributes on that element */
    int maxAttrs;       /* the size of the array */
    const xmlChar *values[5]; /* array of localname/prefix/values/external */
};

/**
 * xmlAttrNormalizeSpace:
 * @src: the source string
 * @dst: the target string
 *
 * Normalize the space in non CDATA attribute values:
 * If the attribute type is not CDATA, then the XML processor MUST further
 * process the normalized attribute value by discarding any leading and
 * trailing space (#x20) characters, and by replacing sequences of space
 * (#x20) characters by a single space (#x20) character.
 * Note that the size of dst need to be at least src, and if one doesn't need
 * to preserve dst (and it doesn't come from a dictionary or read-only) then
 * passing src as dst is just fine.
 *
 * Returns a pointer to the normalized value (dst) or NULL if no conversion
 *         is needed.
 */
static xmlChar *
xmlAttrNormalizeSpace(const xmlChar *src, xmlChar *dst)
{
    if ((src == NULL) || (dst == NULL))
        return(NULL);

    while (*src == 0x20) src++;
    while (*src != 0) {
        if (*src == 0x20) {
            while (*src == 0x20) src++;
            if (*src != 0)
                *dst++ = 0x20;
        } else {
            *dst++ = *src++;
        }
    }
    *dst = 0;
    if (dst == src)
       return(NULL);
    return(dst);
}

/**
 * xmlAttrNormalizeSpace2:
 * @src: the source string
 *
 * Normalize the space in non CDATA attribute values, a slightly more complex
 * front end to avoid allocation problems when running on attribute values
 * coming from the input.
 *
 * Returns a pointer to the normalized value (dst) or NULL if no conversion
 *         is needed.
 */
static const xmlChar *
xmlAttrNormalizeSpace2(xmlParserCtxtPtr ctxt, xmlChar *src, int *len)
{
    int i;
    int remove_head = 0;
    int need_realloc = 0;
    const xmlChar *cur;

    if ((ctxt == NULL) || (src == NULL) || (len == NULL))
        return(NULL);
    i = *len;
    if (i <= 0)
        return(NULL);

    cur = src;
    while (*cur == 0x20) {
        cur++;
        remove_head++;
    }
    while (*cur != 0) {
        if (*cur == 0x20) {
            cur++;
            if ((*cur == 0x20) || (*cur == 0)) {
                need_realloc = 1;
                break;
            }
        } else
            cur++;
    }
    if (need_realloc) {
        xmlChar *ret;

        ret = xmlStrndup(src + remove_head, i - remove_head + 1);
        if (ret == NULL) {
            xmlErrMemory(ctxt, NULL);
            return(NULL);
        }
        xmlAttrNormalizeSpace(ret, ret);
        *len = (int) strlen((const char *)ret);
        return(ret);
    } else if (remove_head) {
        *len -= remove_head;
        memmove(src, src + remove_head, 1 + *len);
        return(src);
    }
    return(NULL);
}

/**
 * xmlAddDefAttrs:
 * @ctxt:  an XML parser context
 * @fullname:  the element fullname
 * @fullattr:  the attribute fullname
 * @value:  the attribute value
 *
 * Add a defaulted attribute for an element
 */
static void
xmlAddDefAttrs(xmlParserCtxtPtr ctxt,
               const xmlChar *fullname,
               const xmlChar *fullattr,
               const xmlChar *value) {
    xmlDefAttrsPtr defaults;
    int len;
    const xmlChar *name;
    const xmlChar *prefix;

    /*
     * Allows to detect attribute redefinitions
     */
    if (ctxt->attsSpecial != NULL) {
        if (xmlHashLookup2(ctxt->attsSpecial, fullname, fullattr) != NULL)
            return;
    }

    if (ctxt->attsDefault == NULL) {
        ctxt->attsDefault = xmlHashCreateDict(10, ctxt->dict);
        if (ctxt->attsDefault == NULL)
            goto mem_error;
    }

    /*
     * split the element name into prefix:localname , the string found
     * are within the DTD and then not associated to namespace names.
     */
    name = xmlSplitQName3(fullname, &len);
    if (name == NULL) {
        name = xmlDictLookup(ctxt->dict, fullname, -1);
        prefix = NULL;
    } else {
        name = xmlDictLookup(ctxt->dict, name, -1);
        prefix = xmlDictLookup(ctxt->dict, fullname, len);
    }

    /*
     * make sure there is some storage
     */
    defaults = xmlHashLookup2(ctxt->attsDefault, name, prefix);
    if (defaults == NULL) {
        defaults = (xmlDefAttrsPtr) xmlMalloc(sizeof(xmlDefAttrs) +
                           (4 * 5) * sizeof(const xmlChar *));
        if (defaults == NULL)
            goto mem_error;
        defaults->nbAttrs = 0;
        defaults->maxAttrs = 4;
        if (xmlHashUpdateEntry2(ctxt->attsDefault, name, prefix,
                                defaults, NULL) < 0) {
            xmlFree(defaults);
            goto mem_error;
        }
    } else if (defaults->nbAttrs >= defaults->maxAttrs) {
        xmlDefAttrsPtr temp;

        temp = (xmlDefAttrsPtr) xmlRealloc(defaults, sizeof(xmlDefAttrs) +
                       (2 * defaults->maxAttrs * 5) * sizeof(const xmlChar *));
        if (temp == NULL)
            goto mem_error;
        defaults = temp;
        defaults->maxAttrs *= 2;
        if (xmlHashUpdateEntry2(ctxt->attsDefault, name, prefix,
                                defaults, NULL) < 0) {
            xmlFree(defaults);
            goto mem_error;
        }
    }

    /*
     * Split the element name into prefix:localname , the string found
     * are within the DTD and hen not associated to namespace names.
     */
    name = xmlSplitQName3(fullattr, &len);
    if (name == NULL) {
        name = xmlDictLookup(ctxt->dict, fullattr, -1);
        prefix = NULL;
    } else {
        name = xmlDictLookup(ctxt->dict, name, -1);
        prefix = xmlDictLookup(ctxt->dict, fullattr, len);
    }

    defaults->values[5 * defaults->nbAttrs] = name;
    defaults->values[5 * defaults->nbAttrs + 1] = prefix;
    /* intern the string and precompute the end */
    len = xmlStrlen(value);
    value = xmlDictLookup(ctxt->dict, value, len);
    defaults->values[5 * defaults->nbAttrs + 2] = value;
    defaults->values[5 * defaults->nbAttrs + 3] = value + len;
    if (ctxt->external)
        defaults->values[5 * defaults->nbAttrs + 4] = BAD_CAST "external";
    else
        defaults->values[5 * defaults->nbAttrs + 4] = NULL;
    defaults->nbAttrs++;

    return;

mem_error:
    xmlErrMemory(ctxt, NULL);
    return;
}

/**
 * xmlAddSpecialAttr:
 * @ctxt:  an XML parser context
 * @fullname:  the element fullname
 * @fullattr:  the attribute fullname
 * @type:  the attribute type
 *
 * Register this attribute type
 */
static void
xmlAddSpecialAttr(xmlParserCtxtPtr ctxt,
                  const xmlChar *fullname,
                  const xmlChar *fullattr,
                  int type)
{
    if (ctxt->attsSpecial == NULL) {
        ctxt->attsSpecial = xmlHashCreateDict(10, ctxt->dict);
        if (ctxt->attsSpecial == NULL)
            goto mem_error;
    }

    if (xmlHashLookup2(ctxt->attsSpecial, fullname, fullattr) != NULL)
        return;

    xmlHashAddEntry2(ctxt->attsSpecial, fullname, fullattr,
                     (void *) (long) type);
    return;

mem_error:
    xmlErrMemory(ctxt, NULL);
    return;
}

/**
 * xmlCleanSpecialAttrCallback:
 *
 * Removes CDATA attributes from the special attribute table
 */
static void
xmlCleanSpecialAttrCallback(void *payload, void *data,
                            const xmlChar *fullname, const xmlChar *fullattr,
                            const xmlChar *unused ATTRIBUTE_UNUSED) {
    xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) data;

    if (((long) payload) == XML_ATTRIBUTE_CDATA) {
        xmlHashRemoveEntry2(ctxt->attsSpecial, fullname, fullattr, NULL);
    }
}

/**
 * xmlCleanSpecialAttr:
 * @ctxt:  an XML parser context
 *
 * Trim the list of attributes defined to remove all those of type
 * CDATA as they are not special. This call should be done when finishing
 * to parse the DTD and before starting to parse the document root.
 */
static void
xmlCleanSpecialAttr(xmlParserCtxtPtr ctxt)
{
    if (ctxt->attsSpecial == NULL)
        return;

    xmlHashScanFull(ctxt->attsSpecial, xmlCleanSpecialAttrCallback, ctxt);

    if (xmlHashSize(ctxt->attsSpecial) == 0) {
        xmlHashFree(ctxt->attsSpecial, NULL);
        ctxt->attsSpecial = NULL;
    }
    return;
}

/**
 * xmlCheckLanguageID:
 * @lang:  pointer to the string value
 *
 * Checks that the value conforms to the LanguageID production:
 *
 * NOTE: this is somewhat deprecated, those productions were removed from
 *       the XML Second edition.
 *
 * [33] LanguageID ::= Langcode ('-' Subcode)*
 * [34] Langcode ::= ISO639Code |  IanaCode |  UserCode
 * [35] ISO639Code ::= ([a-z] | [A-Z]) ([a-z] | [A-Z])
 * [36] IanaCode ::= ('i' | 'I') '-' ([a-z] | [A-Z])+
 * [37] UserCode ::= ('x' | 'X') '-' ([a-z] | [A-Z])+
 * [38] Subcode ::= ([a-z] | [A-Z])+
 *
 * Returns 1 if correct 0 otherwise
 **/
int
xmlCheckLanguageID(const xmlChar * lang)
{
    const xmlChar *cur = lang;

    if (cur == NULL)
        return (0);
    if (((cur[0] == 'i') && (cur[1] == '-')) ||
        ((cur[0] == 'I') && (cur[1] == '-'))) {
        /*
         * IANA code
         */
        cur += 2;
        while (((cur[0] >= 'A') && (cur[0] <= 'Z')) ||  /* non input consuming */
               ((cur[0] >= 'a') && (cur[0] <= 'z')))
            cur++;
    } else if (((cur[0] == 'x') && (cur[1] == '-')) ||
               ((cur[0] == 'X') && (cur[1] == '-'))) {
        /*
         * User code
         */
        cur += 2;
        while (((cur[0] >= 'A') && (cur[0] <= 'Z')) ||  /* non input consuming */
               ((cur[0] >= 'a') && (cur[0] <= 'z')))
            cur++;
    } else if (((cur[0] >= 'A') && (cur[0] <= 'Z')) ||
               ((cur[0] >= 'a') && (cur[0] <= 'z'))) {
        /*
         * ISO639
         */
        cur++;
        if (((cur[0] >= 'A') && (cur[0] <= 'Z')) ||
            ((cur[0] >= 'a') && (cur[0] <= 'z')))
            cur++;
        else
            return (0);
    } else
        return (0);
    while (cur[0] != 0) {       /* non input consuming */
        if (cur[0] != '-')
            return (0);
        cur++;
        if (((cur[0] >= 'A') && (cur[0] <= 'Z')) ||
            ((cur[0] >= 'a') && (cur[0] <= 'z')))
            cur++;
        else
            return (0);
        while (((cur[0] >= 'A') && (cur[0] <= 'Z')) ||  /* non input consuming */
               ((cur[0] >= 'a') && (cur[0] <= 'z')))
            cur++;
    }
    return (1);
}

/************************************************************************
 *                                                                      *
 *              Parser stacks related functions and macros              *
 *                                                                      *
 ************************************************************************/

static xmlEntityPtr xmlParseStringEntityRef(xmlParserCtxtPtr ctxt,
                                            const xmlChar ** str);

#ifdef SAX2
/**
 * nsPush:
 * @ctxt:  an XML parser context
 * @prefix:  the namespace prefix or NULL
 * @URL:  the namespace name
 *
 * Pushes a new parser namespace on top of the ns stack
 *
 * Returns -1 in case of error, -2 if the namespace should be discarded
 *         and the index in the stack otherwise.
 */
static int
nsPush(xmlParserCtxtPtr ctxt, const xmlChar *prefix, const xmlChar *URL)
{
    if (ctxt->options & XML_PARSE_NSCLEAN) {
        int i;
        for (i = 0;i < ctxt->nsNr;i += 2) {
            if (ctxt->nsTab[i] == prefix) {
                /* in scope */
                if (ctxt->nsTab[i + 1] == URL)
                    return(-2);
                /* out of scope keep it */
                break;
            }
        }
    }
    if ((ctxt->nsMax == 0) || (ctxt->nsTab == NULL)) {
        ctxt->nsMax = 10;
        ctxt->nsNr = 0;
        ctxt->nsTab = (const xmlChar **)
                      xmlMalloc(ctxt->nsMax * sizeof(xmlChar *));
        if (ctxt->nsTab == NULL) {
            xmlErrMemory(ctxt, NULL);
            ctxt->nsMax = 0;
            return (-1);
        }
    } else if (ctxt->nsNr >= ctxt->nsMax) {
        const xmlChar ** tmp;
        ctxt->nsMax *= 2;
        tmp = (const xmlChar **) xmlRealloc((char *) ctxt->nsTab,
                                    ctxt->nsMax * sizeof(ctxt->nsTab[0]));
        if (tmp == NULL) {
            xmlErrMemory(ctxt, NULL);
            ctxt->nsMax /= 2;
            return (-1);
        }
        ctxt->nsTab = tmp;
    }
    ctxt->nsTab[ctxt->nsNr++] = prefix;
    ctxt->nsTab[ctxt->nsNr++] = URL;
    return (ctxt->nsNr);
}
/**
 * nsPop:
 * @ctxt: an XML parser context
 * @nr:  the number to pop
 *
 * Pops the top @nr parser prefix/namespace from the ns stack
 *
 * Returns the number of namespaces removed
 */
static int
nsPop(xmlParserCtxtPtr ctxt, int nr)
{
    int i;

    if (ctxt->nsTab == NULL) return(0);
    if (ctxt->nsNr < nr) {
        xmlGenericError(xmlGenericErrorContext, "Pbm popping %d NS\n", nr);
        nr = ctxt->nsNr;
    }
    if (ctxt->nsNr <= 0)
        return (0);

    for (i = 0;i < nr;i++) {
         ctxt->nsNr--;
         ctxt->nsTab[ctxt->nsNr] = NULL;
    }
    return(nr);
}
#endif

static int
xmlCtxtGrowAttrs(xmlParserCtxtPtr ctxt, int nr) {
    const xmlChar **atts;
    int *attallocs;
    int maxatts;

    if (ctxt->atts == NULL) {
        maxatts = 55; /* allow for 10 attrs by default */
        atts = (const xmlChar **)
               xmlMalloc(maxatts * sizeof(xmlChar *));
        if (atts == NULL) goto mem_error;
        ctxt->atts = atts;
        attallocs = (int *) xmlMalloc((maxatts / 5) * sizeof(int));
        if (attallocs == NULL) goto mem_error;
        ctxt->attallocs = attallocs;
        ctxt->maxatts = maxatts;
    } else if (nr + 5 > ctxt->maxatts) {
        maxatts = (nr + 5) * 2;
        atts = (const xmlChar **) xmlRealloc((void *) ctxt->atts,
                                     maxatts * sizeof(const xmlChar *));
        if (atts == NULL) goto mem_error;
        ctxt->atts = atts;
        attallocs = (int *) xmlRealloc((void *) ctxt->attallocs,
                                     (maxatts / 5) * sizeof(int));
        if (attallocs == NULL) goto mem_error;
        ctxt->attallocs = attallocs;
        ctxt->maxatts = maxatts;
    }
    return(ctxt->maxatts);
mem_error:
    xmlErrMemory(ctxt, NULL);
    return(-1);
}

/**
 * inputPush:
 * @ctxt:  an XML parser context
 * @value:  the parser input
 *
 * Pushes a new parser input on top of the input stack
 *
 * Returns -1 in case of error, the index in the stack otherwise
 */
int
inputPush(xmlParserCtxtPtr ctxt, xmlParserInputPtr value)
{
    if ((ctxt == NULL) || (value == NULL))
        return(-1);
    if (ctxt->inputNr >= ctxt->inputMax) {
        ctxt->inputMax *= 2;
        ctxt->inputTab =
            (xmlParserInputPtr *) xmlRealloc(ctxt->inputTab,
                                             ctxt->inputMax *
                                             sizeof(ctxt->inputTab[0]));
        if (ctxt->inputTab == NULL) {
            xmlErrMemory(ctxt, NULL);
            xmlFreeInputStream(value);
            ctxt->inputMax /= 2;
            value = NULL;
            return (-1);
        }
    }
    ctxt->inputTab[ctxt->inputNr] = value;
    ctxt->input = value;
    return (ctxt->inputNr++);
}
/**
 * inputPop:
 * @ctxt: an XML parser context
 *
 * Pops the top parser input from the input stack
 *
 * Returns the input just removed
 */
xmlParserInputPtr
inputPop(xmlParserCtxtPtr ctxt)
{
    xmlParserInputPtr ret;

    if (ctxt == NULL)
        return(NULL);
    if (ctxt->inputNr <= 0)
        return (NULL);
    ctxt->inputNr--;
    if (ctxt->inputNr > 0)
        ctxt->input = ctxt->inputTab[ctxt->inputNr - 1];
    else
        ctxt->input = NULL;
    ret = ctxt->inputTab[ctxt->inputNr];
    ctxt->inputTab[ctxt->inputNr] = NULL;
    return (ret);
}
/**
 * nodePush:
 * @ctxt:  an XML parser context
 * @value:  the element node
 *
 * Pushes a new element node on top of the node stack
 *
 * Returns -1 in case of error, the index in the stack otherwise
 */
int
nodePush(xmlParserCtxtPtr ctxt, xmlNodePtr value)
{
    if (ctxt == NULL) return(0);
    if (ctxt->nodeNr >= ctxt->nodeMax) {
        xmlNodePtr *tmp;

        tmp = (xmlNodePtr *) xmlRealloc(ctxt->nodeTab,
                                      ctxt->nodeMax * 2 *
                                      sizeof(ctxt->nodeTab[0]));
        if (tmp == NULL) {
            xmlErrMemory(ctxt, NULL);
            return (-1);
        }
        ctxt->nodeTab = tmp;
        ctxt->nodeMax *= 2;
    }
    if ((((unsigned int) ctxt->nodeNr) > xmlParserMaxDepth) &&
        ((ctxt->options & XML_PARSE_HUGE) == 0)) {
        xmlFatalErrMsgInt(ctxt, XML_ERR_INTERNAL_ERROR,
                 "Excessive depth in document: %d use XML_PARSE_HUGE option\n",
                          xmlParserMaxDepth);
        ctxt->instate = XML_PARSER_EOF;
        return(-1);
    }
    ctxt->nodeTab[ctxt->nodeNr] = value;
    ctxt->node = value;
    return (ctxt->nodeNr++);
}

/**
 * nodePop:
 * @ctxt: an XML parser context
 *
 * Pops the top element node from the node stack
 *
 * Returns the node just removed
 */
xmlNodePtr
nodePop(xmlParserCtxtPtr ctxt)
{
    xmlNodePtr ret;

    if (ctxt == NULL) return(NULL);
    if (ctxt->nodeNr <= 0)
        return (NULL);
    ctxt->nodeNr--;
    if (ctxt->nodeNr > 0)
        ctxt->node = ctxt->nodeTab[ctxt->nodeNr - 1];
    else
        ctxt->node = NULL;
    ret = ctxt->nodeTab[ctxt->nodeNr];
    ctxt->nodeTab[ctxt->nodeNr] = NULL;
    return (ret);
}

#ifdef LIBXML_PUSH_ENABLED
/**
 * nameNsPush:
 * @ctxt:  an XML parser context
 * @value:  the element name
 * @prefix:  the element prefix
 * @URI:  the element namespace name
 *
 * Pushes a new element name/prefix/URL on top of the name stack
 *
 * Returns -1 in case of error, the index in the stack otherwise
 */
static int
nameNsPush(xmlParserCtxtPtr ctxt, const xmlChar * value,
           const xmlChar *prefix, const xmlChar *URI, int nsNr)
{
    if (ctxt->nameNr >= ctxt->nameMax) {
        const xmlChar * *tmp;
        void **tmp2;
        ctxt->nameMax *= 2;
        tmp = (const xmlChar * *) xmlRealloc((xmlChar * *)ctxt->nameTab,
                                    ctxt->nameMax *
                                    sizeof(ctxt->nameTab[0]));
        if (tmp == NULL) {
            ctxt->nameMax /= 2;
            goto mem_error;
        }
        ctxt->nameTab = tmp;
        tmp2 = (void **) xmlRealloc((void * *)ctxt->pushTab,
                                    ctxt->nameMax * 3 *
                                    sizeof(ctxt->pushTab[0]));
        if (tmp2 == NULL) {
            ctxt->nameMax /= 2;
            goto mem_error;
        }
        ctxt->pushTab = tmp2;
    }
    ctxt->nameTab[ctxt->nameNr] = value;
    ctxt->name = value;
    ctxt->pushTab[ctxt->nameNr * 3] = (void *) prefix;
    ctxt->pushTab[ctxt->nameNr * 3 + 1] = (void *) URI;
    ctxt->pushTab[ctxt->nameNr * 3 + 2] = (void *) (long) nsNr;
    return (ctxt->nameNr++);
mem_error:
    xmlErrMemory(ctxt, NULL);
    return (-1);
}
/**
 * nameNsPop:
 * @ctxt: an XML parser context
 *
 * Pops the top element/prefix/URI name from the name stack
 *
 * Returns the name just removed
 */
static const xmlChar *
nameNsPop(xmlParserCtxtPtr ctxt)
{
    const xmlChar *ret;

    if (ctxt->nameNr <= 0)
        return (NULL);
    ctxt->nameNr--;
    if (ctxt->nameNr > 0)
        ctxt->name = ctxt->nameTab[ctxt->nameNr - 1];
    else
        ctxt->name = NULL;
    ret = ctxt->nameTab[ctxt->nameNr];
    ctxt->nameTab[ctxt->nameNr] = NULL;
    return (ret);
}
#endif /* LIBXML_PUSH_ENABLED */

/**
 * namePush:
 * @ctxt:  an XML parser context
 * @value:  the element name
 *
 * Pushes a new element name on top of the name stack
 *
 * Returns -1 in case of error, the index in the stack otherwise
 */
int
namePush(xmlParserCtxtPtr ctxt, const xmlChar * value)
{
    if (ctxt == NULL) return (-1);

    if (ctxt->nameNr >= ctxt->nameMax) {
        const xmlChar * *tmp;
        ctxt->nameMax *= 2;
        tmp = (const xmlChar * *) xmlRealloc((xmlChar * *)ctxt->nameTab,
                                    ctxt->nameMax *
                                    sizeof(ctxt->nameTab[0]));
        if (tmp == NULL) {
            ctxt->nameMax /= 2;
            goto mem_error;
        }
        ctxt->nameTab = tmp;
    }
    ctxt->nameTab[ctxt->nameNr] = value;
    ctxt->name = value;
    return (ctxt->nameNr++);
mem_error:
    xmlErrMemory(ctxt, NULL);
    return (-1);
}
/**
 * namePop:
 * @ctxt: an XML parser context
 *
 * Pops the top element name from the name stack
 *
 * Returns the name just removed
 */
const xmlChar *
namePop(xmlParserCtxtPtr ctxt)
{
    const xmlChar *ret;

    if ((ctxt == NULL) || (ctxt->nameNr <= 0))
        return (NULL);
    ctxt->nameNr--;
    if (ctxt->nameNr > 0)
        ctxt->name = ctxt->nameTab[ctxt->nameNr - 1];
    else
        ctxt->name = NULL;
    ret = ctxt->nameTab[ctxt->nameNr];
    ctxt->nameTab[ctxt->nameNr] = NULL;
    return (ret);
}

static int spacePush(xmlParserCtxtPtr ctxt, int val) {
    if (ctxt->spaceNr >= ctxt->spaceMax) {
        int *tmp;

        ctxt->spaceMax *= 2;
        tmp = (int *) xmlRealloc(ctxt->spaceTab,
                                 ctxt->spaceMax * sizeof(ctxt->spaceTab[0]));
        if (tmp == NULL) {
            xmlErrMemory(ctxt, NULL);
            ctxt->spaceMax /=2;
            return(-1);
        }
        ctxt->spaceTab = tmp;
    }
    ctxt->spaceTab[ctxt->spaceNr] = val;
    ctxt->space = &ctxt->spaceTab[ctxt->spaceNr];
    return(ctxt->spaceNr++);
}

static int spacePop(xmlParserCtxtPtr ctxt) {
    int ret;
    if (ctxt->spaceNr <= 0) return(0);
    ctxt->spaceNr--;
    if (ctxt->spaceNr > 0)
        ctxt->space = &ctxt->spaceTab[ctxt->spaceNr - 1];
    else
        ctxt->space = &ctxt->spaceTab[0];
    ret = ctxt->spaceTab[ctxt->spaceNr];
    ctxt->spaceTab[ctxt->spaceNr] = -1;
    return(ret);
}

/*
 * Macros for accessing the content. Those should be used only by the parser,
 * and not exported.
 *
 * Dirty macros, i.e. one often need to make assumption on the context to
 * use them
 *
 *   CUR_PTR return the current pointer to the xmlChar to be parsed.
 *           To be used with extreme caution since operations consuming
 *           characters may move the input buffer to a different location !
 *   CUR     returns the current xmlChar value, i.e. a 8 bit value if compiled
 *           This should be used internally by the parser
 *           only to compare to ASCII values otherwise it would break when
 *           running with UTF-8 encoding.
 *   RAW     same as CUR but in the input buffer, bypass any token
 *           extraction that may have been done
 *   NXT(n)  returns the n'th next xmlChar. Same as CUR is should be used only
 *           to compare on ASCII based substring.
 *   SKIP(n) Skip n xmlChar, and must also be used only to skip ASCII defined
 *           strings without newlines within the parser.
 *   NEXT1(l) Skip 1 xmlChar, and must also be used only to skip 1 non-newline ASCII 
 *           defined char within the parser.
 * Clean macros, not dependent of an ASCII context, expect UTF-8 encoding
 *
 *   NEXT    Skip to the next character, this does the proper decoding
 *           in UTF-8 mode. It also pop-up unfinished entities on the fly.
 *   NEXTL(l) Skip the current unicode character of l xmlChars long.
 *   CUR_CHAR(l) returns the current unicode character (int), set l
 *           to the number of xmlChars used for the encoding [0-5].
 *   CUR_SCHAR  same but operate on a string instead of the context
 *   COPY_BUF  copy the current unicode char to the target buffer, increment
 *            the index
 *   GROW, SHRINK  handling of input buffers
 */

#define RAW (*ctxt->input->cur)
#define CUR (*ctxt->input->cur)
#define NXT(val) ctxt->input->cur[(val)]
#define CUR_PTR ctxt->input->cur

#define CMP4( s, c1, c2, c3, c4 ) \
  ( ((unsigned char *) s)[ 0 ] == c1 && ((unsigned char *) s)[ 1 ] == c2 && \
    ((unsigned char *) s)[ 2 ] == c3 && ((unsigned char *) s)[ 3 ] == c4 )
#define CMP5( s, c1, c2, c3, c4, c5 ) \
  ( CMP4( s, c1, c2, c3, c4 ) && ((unsigned char *) s)[ 4 ] == c5 )
#define CMP6( s, c1, c2, c3, c4, c5, c6 ) \
  ( CMP5( s, c1, c2, c3, c4, c5 ) && ((unsigned char *) s)[ 5 ] == c6 )
#define CMP7( s, c1, c2, c3, c4, c5, c6, c7 ) \
  ( CMP6( s, c1, c2, c3, c4, c5, c6 ) && ((unsigned char *) s)[ 6 ] == c7 )
#define CMP8( s, c1, c2, c3, c4, c5, c6, c7, c8 ) \
  ( CMP7( s, c1, c2, c3, c4, c5, c6, c7 ) && ((unsigned char *) s)[ 7 ] == c8 )
#define CMP9( s, c1, c2, c3, c4, c5, c6, c7, c8, c9 ) \
  ( CMP8( s, c1, c2, c3, c4, c5, c6, c7, c8 ) && \
    ((unsigned char *) s)[ 8 ] == c9 )
#define CMP10( s, c1, c2, c3, c4, c5, c6, c7, c8, c9, c10 ) \
  ( CMP9( s, c1, c2, c3, c4, c5, c6, c7, c8, c9 ) && \
    ((unsigned char *) s)[ 9 ] == c10 )

#define SKIP(val) do {                                                  \
    ctxt->nbChars += (val),ctxt->input->cur += (val),ctxt->input->col+=(val);                   \
    if (*ctxt->input->cur == '%') xmlParserHandlePEReference(ctxt);     \
    if ((*ctxt->input->cur == 0) &&                                     \
        (xmlParserInputGrow(ctxt->input, INPUT_CHUNK) <= 0))            \
            xmlPopInput(ctxt);                                          \
  } while (0)

#define SKIPL(val) do {                                                 \
    int skipl;                                                          \
    for(skipl=0; skipl<val; skipl++) {                                  \
        if (*(ctxt->input->cur) == '\n') {                              \
        ctxt->input->line++; ctxt->input->col = 1;                      \
        } else ctxt->input->col++;                                      \
        ctxt->nbChars++;                                                \
        ctxt->input->cur++;                                             \
    }                                                                   \
    if (*ctxt->input->cur == '%') xmlParserHandlePEReference(ctxt);     \
    if ((*ctxt->input->cur == 0) &&                                     \
        (xmlParserInputGrow(ctxt->input, INPUT_CHUNK) <= 0))            \
            xmlPopInput(ctxt);                                          \
  } while (0)

#define SHRINK if ((ctxt->progressive == 0) &&                          \
                   (ctxt->input->cur - ctxt->input->base > 2 * INPUT_CHUNK) && \
                   (ctxt->input->end - ctxt->input->cur < 2 * INPUT_CHUNK)) \
        xmlSHRINK (ctxt);

static void xmlSHRINK (xmlParserCtxtPtr ctxt) {
    xmlParserInputShrink(ctxt->input);
    if ((*ctxt->input->cur == 0) &&
        (xmlParserInputGrow(ctxt->input, INPUT_CHUNK) <= 0))
            xmlPopInput(ctxt);
  }

#define GROW if ((ctxt->progressive == 0) &&                            \
                 (ctxt->input->end - ctxt->input->cur < INPUT_CHUNK))   \
        xmlGROW (ctxt);

static void xmlGROW (xmlParserCtxtPtr ctxt) {
    xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
    if ((ctxt->input->cur != NULL) && (*ctxt->input->cur == 0) &&
        (xmlParserInputGrow(ctxt->input, INPUT_CHUNK) <= 0))
            xmlPopInput(ctxt);
}

#define SKIP_BLANKS xmlSkipBlankChars(ctxt)

#define NEXT xmlNextChar(ctxt)

#define NEXT1 {                                                         \
        ctxt->input->col++;                                             \
        ctxt->input->cur++;                                             \
        ctxt->nbChars++;                                                \
        if (*ctxt->input->cur == 0)                                     \
            xmlParserInputGrow(ctxt->input, INPUT_CHUNK);               \
    }

#define NEXTL(l) do {                                                   \
    if (*(ctxt->input->cur) == '\n') {                                  \
        ctxt->input->line++; ctxt->input->col = 1;                      \
    } else ctxt->input->col++;                                          \
    ctxt->input->cur += l;                              \
    if (*ctxt->input->cur == '%') xmlParserHandlePEReference(ctxt);     \
  } while (0)

#define CUR_CHAR(l) xmlCurrentChar(ctxt, &l)
#define CUR_SCHAR(s, l) xmlStringCurrentChar(ctxt, s, &l)

#define COPY_BUF(l,b,i,v)                                               \
    if (l == 1) b[i++] = (xmlChar) v;                                   \
    else i += xmlCopyCharMultiByte(&b[i],v)

/**
 * xmlSkipBlankChars:
 * @ctxt:  the XML parser context
 *
 * skip all blanks character found at that point in the input streams.
 * It pops up finished entities in the process if allowable at that point.
 *
 * Returns the number of space chars skipped
 */

int
xmlSkipBlankChars(xmlParserCtxtPtr ctxt) {
    int res = 0;

    /*
     * It's Okay to use CUR/NEXT here since all the blanks are on
     * the ASCII range.
     */
    if ((ctxt->inputNr == 1) && (ctxt->instate != XML_PARSER_DTD)) {
        const xmlChar *cur;
        /*
         * if we are in the document content, go really fast
         */
        cur = ctxt->input->cur;
        while (IS_BLANK_CH(*cur)) {
            if (*cur == '\n') {
                ctxt->input->line++; ctxt->input->col = 1;
            }
            cur++;
            res++;
            if (*cur == 0) {
                ctxt->input->cur = cur;
                xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
                cur = ctxt->input->cur;
            }
        }
        ctxt->input->cur = cur;
    } else {
        int cur;
        do {
            cur = CUR;
            while (IS_BLANK_CH(cur)) { /* CHECKED tstblanks.xml */
                NEXT;
                cur = CUR;
                res++;
            }
            while ((cur == 0) && (ctxt->inputNr > 1) &&
                   (ctxt->instate != XML_PARSER_COMMENT)) {
                xmlPopInput(ctxt);
                cur = CUR;
            }
            /*
             * Need to handle support of entities branching here
             */
            if (*ctxt->input->cur == '%') xmlParserHandlePEReference(ctxt);
        } while (IS_BLANK(cur)); /* CHECKED tstblanks.xml */
    }
    return(res);
}

/************************************************************************
 *                                                                      *
 *              Commodity functions to handle entities                  *
 *                                                                      *
 ************************************************************************/

/**
 * xmlPopInput:
 * @ctxt:  an XML parser context
 *
 * xmlPopInput: the current input pointed by ctxt->input came to an end
 *          pop it and return the next char.
 *
 * Returns the current xmlChar in the parser context
 */
xmlChar
xmlPopInput(xmlParserCtxtPtr ctxt) {
    if ((ctxt == NULL) || (ctxt->inputNr <= 1)) return(0);
    if (xmlParserDebugEntities)
        xmlGenericError(xmlGenericErrorContext,
                "Popping input %d\n", ctxt->inputNr);
    xmlFreeInputStream(inputPop(ctxt));
    if ((*ctxt->input->cur == 0) &&
        (xmlParserInputGrow(ctxt->input, INPUT_CHUNK) <= 0))
            return(xmlPopInput(ctxt));
    return(CUR);
}

/**
 * xmlPushInput:
 * @ctxt:  an XML parser context
 * @input:  an XML parser input fragment (entity, XML fragment ...).
 *
 * xmlPushInput: switch to a new input stream which is stacked on top
 *               of the previous one(s).
 * Returns -1 in case of error or the index in the input stack
 */
int
xmlPushInput(xmlParserCtxtPtr ctxt, xmlParserInputPtr input) {
    int ret;
    if (input == NULL) return(-1);

    if (xmlParserDebugEntities) {
        if ((ctxt->input != NULL) && (ctxt->input->filename))
            xmlGenericError(xmlGenericErrorContext,
                    "%s(%d): ", ctxt->input->filename,
                    ctxt->input->line);
        xmlGenericError(xmlGenericErrorContext,
                "Pushing input %d : %.30s\n", ctxt->inputNr+1, input->cur);
    }
    ret = inputPush(ctxt, input);
    if (ctxt->instate == XML_PARSER_EOF)
        return(-1);
    GROW;
    return(ret);
}

/**
 * xmlParseCharRef:
 * @ctxt:  an XML parser context
 *
 * parse Reference declarations
 *
 * [66] CharRef ::= '&#' [0-9]+ ';' |
 *                  '&#x' [0-9a-fA-F]+ ';'
 *
 * [ WFC: Legal Character ]
 * Characters referred to using character references must match the
 * production for Char. 
 *
 * Returns the value parsed (as an int), 0 in case of error
 */
int
xmlParseCharRef(xmlParserCtxtPtr ctxt) {
    unsigned int val = 0;
    int count = 0;
    unsigned int outofrange = 0;

    /*
     * Using RAW/CUR/NEXT is okay since we are working on ASCII range here
     */
    if ((RAW == '&') && (NXT(1) == '#') &&
        (NXT(2) == 'x')) {
        SKIP(3);
        GROW;
        while (RAW != ';') { /* loop blocked by count */
            if (count++ > 20) {
                count = 0;
                GROW;
                if (ctxt->instate == XML_PARSER_EOF)
                    return(0);
            }
            if ((RAW >= '0') && (RAW <= '9')) 
                val = val * 16 + (CUR - '0');
            else if ((RAW >= 'a') && (RAW <= 'f') && (count < 20))
                val = val * 16 + (CUR - 'a') + 10;
            else if ((RAW >= 'A') && (RAW <= 'F') && (count < 20))
                val = val * 16 + (CUR - 'A') + 10;
            else {
                xmlFatalErr(ctxt, XML_ERR_INVALID_HEX_CHARREF, NULL);
                val = 0;
                break;
            }
            if (val > 0x10FFFF)
                outofrange = val;

            NEXT;
            count++;
        }
        if (RAW == ';') {
            /* on purpose to avoid reentrancy problems with NEXT and SKIP */
            ctxt->input->col++;
            ctxt->nbChars ++;
            ctxt->input->cur++;
        }
    } else if  ((RAW == '&') && (NXT(1) == '#')) {
        SKIP(2);
        GROW;
        while (RAW != ';') { /* loop blocked by count */
            if (count++ > 20) {
                count = 0;
                GROW;
                if (ctxt->instate == XML_PARSER_EOF)
                    return(0);
            }
            if ((RAW >= '0') && (RAW <= '9')) 
                val = val * 10 + (CUR - '0');
            else {
                xmlFatalErr(ctxt, XML_ERR_INVALID_DEC_CHARREF, NULL);
                val = 0;
                break;
            }
            if (val > 0x10FFFF)
                outofrange = val;

            NEXT;
            count++;
        }
        if (RAW == ';') {
            /* on purpose to avoid reentrancy problems with NEXT and SKIP */
            ctxt->input->col++;
            ctxt->nbChars ++;
            ctxt->input->cur++;
        }
    } else {
        xmlFatalErr(ctxt, XML_ERR_INVALID_CHARREF, NULL);
    }

    /*
     * [ WFC: Legal Character ]
     * Characters referred to using character references must match the
     * production for Char. 
     */
    if ((IS_CHAR(val) && (outofrange == 0))) {
        return(val);
    } else {
        xmlFatalErrMsgInt(ctxt, XML_ERR_INVALID_CHAR,
                          "xmlParseCharRef: invalid xmlChar value %d\n",
                          val);
    }
    return(0);
}

/**
 * xmlParseStringCharRef:
 * @ctxt:  an XML parser context
 * @str:  a pointer to an index in the string
 *
 * parse Reference declarations, variant parsing from a string rather
 * than an an input flow.
 *
 * [66] CharRef ::= '&#' [0-9]+ ';' |
 *                  '&#x' [0-9a-fA-F]+ ';'
 *
 * [ WFC: Legal Character ]
 * Characters referred to using character references must match the
 * production for Char. 
 *
 * Returns the value parsed (as an int), 0 in case of error, str will be
 *         updated to the current value of the index
 */
static int
xmlParseStringCharRef(xmlParserCtxtPtr ctxt, const xmlChar **str) {
    const xmlChar *ptr;
    xmlChar cur;
    unsigned int val = 0;
    unsigned int outofrange = 0;

    if ((str == NULL) || (*str == NULL)) return(0);
    ptr = *str;
    cur = *ptr;
    if ((cur == '&') && (ptr[1] == '#') && (ptr[2] == 'x')) {
        ptr += 3;
        cur = *ptr;
        while (cur != ';') { /* Non input consuming loop */
            if ((cur >= '0') && (cur <= '9')) 
                val = val * 16 + (cur - '0');
            else if ((cur >= 'a') && (cur <= 'f'))
                val = val * 16 + (cur - 'a') + 10;
            else if ((cur >= 'A') && (cur <= 'F'))
                val = val * 16 + (cur - 'A') + 10;
            else {
                xmlFatalErr(ctxt, XML_ERR_INVALID_HEX_CHARREF, NULL);
                val = 0;
                break;
            }
            if (val > 0x10FFFF)
                outofrange = val;

            ptr++;
            cur = *ptr;
        }
        if (cur == ';')
            ptr++;
    } else if  ((cur == '&') && (ptr[1] == '#')){
        ptr += 2;
        cur = *ptr;
        while (cur != ';') { /* Non input consuming loops */
            if ((cur >= '0') && (cur <= '9')) 
                val = val * 10 + (cur - '0');
            else {
                xmlFatalErr(ctxt, XML_ERR_INVALID_DEC_CHARREF, NULL);
                val = 0;
                break;
            }
            if (val > 0x10FFFF)
                outofrange = val;

            ptr++;
            cur = *ptr;
        }
        if (cur == ';')
            ptr++;
    } else {
        xmlFatalErr(ctxt, XML_ERR_INVALID_CHARREF, NULL);
        return(0);
    }
    *str = ptr;

    /*
     * [ WFC: Legal Character ]
     * Characters referred to using character references must match the
     * production for Char. 
     */
    if ((IS_CHAR(val) && (outofrange == 0))) {
        return(val);
    } else {
        xmlFatalErrMsgInt(ctxt, XML_ERR_INVALID_CHAR,
                          "xmlParseStringCharRef: invalid xmlChar value %d\n",
                          val);
    }
    return(0);
}

/**
 * xmlNewBlanksWrapperInputStream:
 * @ctxt:  an XML parser context
 * @entity:  an Entity pointer
 *
 * Create a new input stream for wrapping
 * blanks around a PEReference
 *
 * Returns the new input stream or NULL
 */
 
static void deallocblankswrapper (xmlChar *str) {xmlFree(str);}
 
static xmlParserInputPtr
xmlNewBlanksWrapperInputStream(xmlParserCtxtPtr ctxt, xmlEntityPtr entity) {
    xmlParserInputPtr input;
    xmlChar *buffer;
    size_t length;
    if (entity == NULL) {
        xmlFatalErr(ctxt, XML_ERR_INTERNAL_ERROR,
                    "xmlNewBlanksWrapperInputStream entity\n");
        return(NULL);
    }
    if (xmlParserDebugEntities)
        xmlGenericError(xmlGenericErrorContext,
                "new blanks wrapper for entity: %s\n", entity->name);
    input = xmlNewInputStream(ctxt);
    if (input == NULL) {
        return(NULL);
    }
    length = xmlStrlen(entity->name) + 5;
    buffer = xmlMallocAtomic(length);
    if (buffer == NULL) {
        xmlErrMemory(ctxt, NULL);
        xmlFree(input);
        return(NULL);
    }
    buffer [0] = ' ';
    buffer [1] = '%';
    buffer [length-3] = ';';
    buffer [length-2] = ' ';
    buffer [length-1] = 0;
    memcpy(buffer + 2, entity->name, length - 5);
    input->free = deallocblankswrapper;
    input->base = buffer;
    input->cur = buffer;
    input->length = length;
    input->end = &buffer[length];
    return(input);
}

/**
 * xmlParserHandlePEReference:
 * @ctxt:  the parser context
 * 
 * [69] PEReference ::= '%' Name ';'
 *
 * [ WFC: No Recursion ]
 * A parsed entity must not contain a recursive
 * reference to itself, either directly or indirectly. 
 *
 * [ WFC: Entity Declared ]
 * In a document without any DTD, a document with only an internal DTD
 * subset which contains no parameter entity references, or a document
 * with "standalone='yes'", ...  ... The declaration of a parameter
 * entity must precede any reference to it...
 *
 * [ VC: Entity Declared ]
 * In a document with an external subset or external parameter entities
 * with "standalone='no'", ...  ... The declaration of a parameter entity
 * must precede any reference to it...
 *
 * [ WFC: In DTD ]
 * Parameter-entity references may only appear in the DTD.
 * NOTE: misleading but this is handled.
 *
 * A PEReference may have been detected in the current input stream
 * the handling is done accordingly to 
 *      http://www.w3.org/TR/REC-xml#entproc
 * i.e. 
 *   - Included in literal in entity values
 *   - Included as Parameter Entity reference within DTDs
 */
void
xmlParserHandlePEReference(xmlParserCtxtPtr ctxt) {
    const xmlChar *name;
    xmlEntityPtr entity = NULL;
    xmlParserInputPtr input;

    if (RAW != '%') return;
    switch(ctxt->instate) {
        case XML_PARSER_CDATA_SECTION:
            return;
        case XML_PARSER_COMMENT:
            return;
        case XML_PARSER_START_TAG:
            return;
        case XML_PARSER_END_TAG:
            return;
        case XML_PARSER_EOF:
            xmlFatalErr(ctxt, XML_ERR_PEREF_AT_EOF, NULL);
            return;
        case XML_PARSER_PROLOG:
        case XML_PARSER_START:
        case XML_PARSER_MISC:
            xmlFatalErr(ctxt, XML_ERR_PEREF_IN_PROLOG, NULL);
            return;
        case XML_PARSER_ENTITY_DECL:
        case XML_PARSER_CONTENT:
        case XML_PARSER_ATTRIBUTE_VALUE:
        case XML_PARSER_PI:
        case XML_PARSER_SYSTEM_LITERAL:
        case XML_PARSER_PUBLIC_LITERAL:
            /* we just ignore it there */
            return;
        case XML_PARSER_EPILOG:
            xmlFatalErr(ctxt, XML_ERR_PEREF_IN_EPILOG, NULL);
            return;
        case XML_PARSER_ENTITY_VALUE:
            /*
             * NOTE: in the case of entity values, we don't do the
             *       substitution here since we need the literal
             *       entity value to be able to save the internal
             *       subset of the document.
             *       This will be handled by xmlStringDecodeEntities
             */
            return;
        case XML_PARSER_DTD:
            /*
             * [WFC: Well-Formedness Constraint: PEs in Internal Subset]
             * In the internal DTD subset, parameter-entity references
             * can occur only where markup declarations can occur, not
             * within markup declarations.
             * In that case this is handled in xmlParseMarkupDecl
             */
            if ((ctxt->external == 0) && (ctxt->inputNr == 1))
                return;
            if (IS_BLANK_CH(NXT(1)) || NXT(1) == 0)
                return;
            break;
        case XML_PARSER_IGNORE:
            return;
    }

    NEXT;
    name = xmlParseName(ctxt);
    if (xmlParserDebugEntities)
        xmlGenericError(xmlGenericErrorContext,
                "PEReference: %s\n", name);
    if (name == NULL) {
        xmlFatalErr(ctxt, XML_ERR_PEREF_NO_NAME, NULL);
    } else {
        if (RAW == ';') {
            NEXT;
            if ((ctxt->sax != NULL) && (ctxt->sax->getParameterEntity != NULL))
                entity = ctxt->sax->getParameterEntity(ctxt->userData, name);
            if (ctxt->instate == XML_PARSER_EOF)
                return;
            if (entity == NULL) {
                
                /*
                 * [ WFC: Entity Declared ]
                 * In a document without any DTD, a document with only an
                 * internal DTD subset which contains no parameter entity
                 * references, or a document with "standalone='yes'", ...
                 * ... The declaration of a parameter entity must precede
                 * any reference to it...
                 */
                if ((ctxt->standalone == 1) ||
                    ((ctxt->hasExternalSubset == 0) &&
                     (ctxt->hasPErefs == 0))) {
                    xmlFatalErrMsgStr(ctxt, XML_ERR_UNDECLARED_ENTITY,
                         "PEReference: %%%s; not found\n", name);
                } else {
                    /*
                     * [ VC: Entity Declared ]
                     * In a document with an external subset or external
                     * parameter entities with "standalone='no'", ...
                     * ... The declaration of a parameter entity must precede
                     * any reference to it...
                     */
                    if ((ctxt->validate) && (ctxt->vctxt.error != NULL)) {
                        xmlValidityError(ctxt, XML_WAR_UNDECLARED_ENTITY,
                                         "PEReference: %%%s; not found\n",
                                         name, NULL);
                    } else 
                        xmlWarningMsg(ctxt, XML_WAR_UNDECLARED_ENTITY,
                                      "PEReference: %%%s; not found\n",
                                      name, NULL);
                    ctxt->valid = 0;
                }
            } else if (ctxt->input->free != deallocblankswrapper) {
                    input = xmlNewBlanksWrapperInputStream(ctxt, entity);
                    if (xmlPushInput(ctxt, input) < 0)
                        return;
            } else {
                if ((entity->etype == XML_INTERNAL_PARAMETER_ENTITY) ||
                    (entity->etype == XML_EXTERNAL_PARAMETER_ENTITY)) {
                    xmlChar start[4];
                    xmlCharEncoding enc;

                    /*
                     * handle the extra spaces added before and after
                     * c.f. http://www.w3.org/TR/REC-xml#as-PE
                     * this is done independently.
                     */
                    input = xmlNewEntityInputStream(ctxt, entity);
                    if (xmlPushInput(ctxt, input) < 0)
                        return;

                    /* 
                     * Get the 4 first bytes and decode the charset
                     * if enc != XML_CHAR_ENCODING_NONE
                     * plug some encoding conversion routines.
                     * Note that, since we may have some non-UTF8
                     * encoding (like UTF16, bug 135229), the 'length'
                     * is not known, but we can calculate based upon
                     * the amount of data in the buffer.
                     */
                    GROW
                    if (ctxt->instate == XML_PARSER_EOF)
                        return;
                    if ((ctxt->input->end - ctxt->input->cur)>=4) {
                        start[0] = RAW;
                        start[1] = NXT(1);
                        start[2] = NXT(2);
                        start[3] = NXT(3);
                        enc = xmlDetectCharEncoding(start, 4);
                        if (enc != XML_CHAR_ENCODING_NONE) {
                            xmlSwitchEncoding(ctxt, enc);
                        }
                    }

                    if ((entity->etype == XML_EXTERNAL_PARAMETER_ENTITY) &&
                        (CMP5(CUR_PTR, '<', '?', 'x', 'm', 'l' )) &&
                        (IS_BLANK_CH(NXT(5)))) {
                        xmlParseTextDecl(ctxt);
                    }
                } else {
                    xmlFatalErrMsgStr(ctxt, XML_ERR_ENTITY_IS_PARAMETER,
                             "PEReference: %s is not a parameter entity\n",
                                      name);
                }
            }
        } else {
            xmlFatalErr(ctxt, XML_ERR_PEREF_SEMICOL_MISSING, NULL);
        }
    }
}

/*
 * Macro used to grow the current buffer.
 */
#define growBuffer(buffer, n) {                                         \
    xmlChar *tmp;                                                       \
    buffer##_size *= 2;                                                 \
    buffer##_size += n;                                                 \
    tmp = (xmlChar *)                                                   \
                xmlRealloc(buffer, buffer##_size * sizeof(xmlChar));    \
    if (tmp == NULL) goto mem_error;                                    \
    buffer = tmp;                                                       \
}

/**
 * xmlStringLenDecodeEntities:
 * @ctxt:  the parser context
 * @str:  the input string
 * @len: the string length
 * @what:  combination of XML_SUBSTITUTE_REF and XML_SUBSTITUTE_PEREF
 * @end:  an end marker xmlChar, 0 if none
 * @end2:  an end marker xmlChar, 0 if none
 * @end3:  an end marker xmlChar, 0 if none
 * 
 * Takes a entity string content and process to do the adequate substitutions.
 *
 * [67] Reference ::= EntityRef | CharRef
 *
 * [69] PEReference ::= '%' Name ';'
 *
 * Returns A newly allocated string with the substitution done. The caller
 *      must deallocate it !
 */
xmlChar *
xmlStringLenDecodeEntities(xmlParserCtxtPtr ctxt, const xmlChar *str, int len,
                      int what, xmlChar end, xmlChar  end2, xmlChar end3) {
    xmlChar *buffer = NULL;
    int buffer_size = 0;

    xmlChar *current = NULL;
    xmlChar *rep = NULL;
    const xmlChar *last;
    xmlEntityPtr ent;
    int c,l;
    int nbchars = 0;

    if ((ctxt == NULL) || (str == NULL) || (len < 0))
        return(NULL);
    last = str + len;

    if (((ctxt->depth > 40) &&
         ((ctxt->options & XML_PARSE_HUGE) == 0)) ||
        (ctxt->depth > 1024)) {
        xmlFatalErr(ctxt, XML_ERR_ENTITY_LOOP, NULL);
        return(NULL);
    }

    /*
     * allocate a translation buffer.
     */
    buffer_size = XML_PARSER_BIG_BUFFER_SIZE;
    buffer = (xmlChar *) xmlMallocAtomic(buffer_size * sizeof(xmlChar));
    if (buffer == NULL) goto mem_error;

    /*
     * OK loop until we reach one of the ending char or a size limit.
     * we are operating on already parsed values.
     */
    if (str < last)
        c = CUR_SCHAR(str, l);
    else
        c = 0;
    while ((c != 0) && (c != end) && /* non input consuming loop */
           (c != end2) && (c != end3)) {

        if (c == 0) break;
        if ((c == '&') && (str[1] == '#')) {
            int val = xmlParseStringCharRef(ctxt, &str);
            if (val != 0) {
                COPY_BUF(0,buffer,nbchars,val);
            }
            if (nbchars > buffer_size - XML_PARSER_BUFFER_SIZE) {
                growBuffer(buffer, XML_PARSER_BUFFER_SIZE);
            }
        } else if ((c == '&') && (what & XML_SUBSTITUTE_REF)) {
            if (xmlParserDebugEntities)
                xmlGenericError(xmlGenericErrorContext,
                        "String decoding Entity Reference: %.30s\n",
                        str);
            ent = xmlParseStringEntityRef(ctxt, &str);
            if ((ctxt->lastError.code == XML_ERR_ENTITY_LOOP) ||
                (ctxt->lastError.code == XML_ERR_INTERNAL_ERROR))
                goto int_error;
            if (ent != NULL)
                ctxt->nbentities += ent->checked;
            if ((ent != NULL) &&
                (ent->etype == XML_INTERNAL_PREDEFINED_ENTITY)) {
                if (ent->content != NULL) {
                    COPY_BUF(0,buffer,nbchars,ent->content[0]);
                    if (nbchars > buffer_size - XML_PARSER_BUFFER_SIZE) {
                        growBuffer(buffer, XML_PARSER_BUFFER_SIZE);
                    }
                } else {
                    xmlFatalErrMsg(ctxt, XML_ERR_INTERNAL_ERROR,
                            "predefined entity has no content\n");
                }
            } else if ((ent != NULL) && (ent->content != NULL)) {
                ctxt->depth++;
                rep = xmlStringDecodeEntities(ctxt, ent->content, what,
                                              0, 0, 0);
                ctxt->depth--;

                if (rep != NULL) {
                    current = rep;
                    while (*current != 0) { /* non input consuming loop */
                        buffer[nbchars++] = *current++;
                        if (nbchars >
                            buffer_size - XML_PARSER_BUFFER_SIZE) {
                            if (xmlParserEntityCheck(ctxt, nbchars, ent))
                                goto int_error;
                            growBuffer(buffer, XML_PARSER_BUFFER_SIZE);
                        }
                    }
                    xmlFree(rep);
                    rep = NULL;
                }
            } else if (ent != NULL) {
                int i = xmlStrlen(ent->name);
                const xmlChar *cur = ent->name;

                buffer[nbchars++] = '&';
                if (nbchars > buffer_size - i - XML_PARSER_BUFFER_SIZE) {
                    growBuffer(buffer, i + XML_PARSER_BUFFER_SIZE);
                }
                for (;i > 0;i--)
                    buffer[nbchars++] = *cur++;
                buffer[nbchars++] = ';';
            }
        } else if (c == '%' && (what & XML_SUBSTITUTE_PEREF)) {
            if (xmlParserDebugEntities)
                xmlGenericError(xmlGenericErrorContext,
                        "String decoding PE Reference: %.30s\n", str);
            ent = xmlParseStringPEReference(ctxt, &str);
            if (ctxt->lastError.code == XML_ERR_ENTITY_LOOP)
                goto int_error;
            if (ent != NULL)
                ctxt->nbentities += ent->checked;
            if (ent != NULL) {
                if (ent->content == NULL) {
                    xmlLoadEntityContent(ctxt, ent);
                }
                ctxt->depth++;
                rep = xmlStringDecodeEntities(ctxt, ent->content, what,
                                              0, 0, 0);
                ctxt->depth--;
                if (rep != NULL) {
                    current = rep;
                    while (*current != 0) { /* non input consuming loop */
                        buffer[nbchars++] = *current++;
                        if (nbchars >
                            buffer_size - XML_PARSER_BUFFER_SIZE) {
                            if (xmlParserEntityCheck(ctxt, nbchars, ent))
                                goto int_error;
                            growBuffer(buffer, XML_PARSER_BUFFER_SIZE);
                        }
                    }
                    xmlFree(rep);
                    rep = NULL;
                }
            }
        } else {
            COPY_BUF(l,buffer,nbchars,c);
            str += l;
            if (nbchars > buffer_size - XML_PARSER_BUFFER_SIZE) {
              growBuffer(buffer, XML_PARSER_BUFFER_SIZE);
            }
        }
        if (str < last)
            c = CUR_SCHAR(str, l);
        else
            c = 0;
    }
    buffer[nbchars] = 0;
    return(buffer);

mem_error:
    xmlErrMemory(ctxt, NULL);
int_error:
    if (rep != NULL)
        xmlFree(rep);
    if (buffer != NULL)
        xmlFree(buffer);
    return(NULL);
}

/**
 * xmlStringDecodeEntities:
 * @ctxt:  the parser context
 * @str:  the input string
 * @what:  combination of XML_SUBSTITUTE_REF and XML_SUBSTITUTE_PEREF
 * @end:  an end marker xmlChar, 0 if none
 * @end2:  an end marker xmlChar, 0 if none
 * @end3:  an end marker xmlChar, 0 if none
 * 
 * Takes a entity string content and process to do the adequate substitutions.
 *
 * [67] Reference ::= EntityRef | CharRef
 *
 * [69] PEReference ::= '%' Name ';'
 *
 * Returns A newly allocated string with the substitution done. The caller
 *      must deallocate it !
 */
xmlChar *
xmlStringDecodeEntities(xmlParserCtxtPtr ctxt, const xmlChar *str, int what,
                        xmlChar end, xmlChar  end2, xmlChar end3) {
    if ((ctxt == NULL) || (str == NULL)) return(NULL);
    return(xmlStringLenDecodeEntities(ctxt, str, xmlStrlen(str), what,
           end, end2, end3));
}

/************************************************************************
 *                                                                      *
 *              Commodity functions, cleanup needed ?                   *
 *                                                                      *
 ************************************************************************/

/**
 * areBlanks:
 * @ctxt:  an XML parser context
 * @str:  a xmlChar *
 * @len:  the size of @str
 * @blank_chars: we know the chars are blanks
 *
 * Is this a sequence of blank chars that one can ignore ?
 *
 * Returns 1 if ignorable 0 otherwise.
 */

static int areBlanks(xmlParserCtxtPtr ctxt, const xmlChar *str, int len,
                     int blank_chars) {
    int i, ret;
    xmlNodePtr lastChild;

    /*
     * Don't spend time trying to differentiate them, the same callback is
     * used !
     */
    if (ctxt->sax->ignorableWhitespace == ctxt->sax->characters)
        return(0);

    /*
     * Check for xml:space value.
     */
    if ((ctxt->space == NULL) || (*(ctxt->space) == 1) ||
        (*(ctxt->space) == -2))
        return(0);

    /*
     * Check that the string is made of blanks
     */
    if (blank_chars == 0) {
        for (i = 0;i < len;i++)
            if (!(IS_BLANK_CH(str[i]))) return(0);
    }

    /*
     * Look if the element is mixed content in the DTD if available
     */
    if (ctxt->node == NULL) return(0);
    if (ctxt->myDoc != NULL) {
        ret = xmlIsMixedElement(ctxt->myDoc, ctxt->node->name);
        if (ret == 0) return(1);
        if (ret == 1) return(0);
    }

    /*
     * Otherwise, heuristic :-\
     */
    if ((RAW != '<') && (RAW != 0xD)) return(0);
    if ((ctxt->node->children == NULL) &&
        (RAW == '<') && (NXT(1) == '/')) return(0);

    lastChild = xmlGetLastChild(ctxt->node);
    if (lastChild == NULL) {
        if ((ctxt->node->type != XML_ELEMENT_NODE) &&
            (ctxt->node->content != NULL)) return(0);
    } else if (xmlNodeIsText(lastChild))
        return(0);
    else if ((ctxt->node->children != NULL) &&
             (xmlNodeIsText(ctxt->node->children)))
        return(0);
    return(1);
}

/************************************************************************
 *                                                                      *
 *              Extra stuff for namespace support                       *
 *      Relates to http://www.w3.org/TR/WD-xml-names                    *
 *                                                                      *
 ************************************************************************/

/**
 * xmlSplitQName:
 * @ctxt:  an XML parser context
 * @name:  an XML parser context
 * @prefix:  a xmlChar **
 *
 * parse an UTF8 encoded XML qualified name string
 *
 * [NS 5] QName ::= (Prefix ':')? LocalPart
 *
 * [NS 6] Prefix ::= NCName
 *
 * [NS 7] LocalPart ::= NCName
 *
 * Returns the local part, and prefix is updated
 *   to get the Prefix if any.
 */

xmlChar *
xmlSplitQName(xmlParserCtxtPtr ctxt, const xmlChar *name, xmlChar **prefix) {
    xmlChar buf[XML_MAX_NAMELEN + 5];
    xmlChar *buffer = NULL;
    int len = 0;
    int max = XML_MAX_NAMELEN;
    xmlChar *ret = NULL;
    const xmlChar *cur = name;
    int c;

    if (prefix == NULL) return(NULL);
    *prefix = NULL;

    if (cur == NULL) return(NULL);

#ifndef XML_XML_NAMESPACE
    /* xml: prefix is not really a namespace */
    if ((cur[0] == 'x') && (cur[1] == 'm') &&
        (cur[2] == 'l') && (cur[3] == ':'))
        return(xmlStrdup(name));
#endif

    /* nasty but well=formed */
    if (cur[0] == ':')
        return(xmlStrdup(name));

    c = *cur++;
    while ((c != 0) && (c != ':') && (len < max)) { /* tested bigname.xml */
        buf[len++] = c;
        c = *cur++;
    }
    if (len >= max) {
        /*
         * Okay someone managed to make a huge name, so he's ready to pay
         * for the processing speed.
         */
        max = len * 2;

        buffer = (xmlChar *) xmlMallocAtomic(max * sizeof(xmlChar));
        if (buffer == NULL) {
            xmlErrMemory(ctxt, NULL);
            return(NULL);
        }
        memcpy(buffer, buf, len);
        while ((c != 0) && (c != ':')) { /* tested bigname.xml */
            if (len + 10 > max) {
                xmlChar *tmp;

                max *= 2;
                tmp = (xmlChar *) xmlRealloc(buffer,
                                                max * sizeof(xmlChar));
                if (tmp == NULL) {
                    xmlFree(buffer);
                    xmlErrMemory(ctxt, NULL);
                    return(NULL);
                }
                buffer = tmp;
            }
            buffer[len++] = c;
            c = *cur++;
        }
        buffer[len] = 0;
    }

    if ((c == ':') && (*cur == 0)) {
        if (buffer != NULL)
            xmlFree(buffer);
        *prefix = NULL;
        return(xmlStrdup(name));
    }

    if (buffer == NULL)
        ret = xmlStrndup(buf, len);
    else {
        ret = buffer;
        buffer = NULL;
        max = XML_MAX_NAMELEN;
    }


    if (c == ':') {
        c = *cur;
        *prefix = ret;
        if (c == 0) {
            return(xmlStrndup(BAD_CAST "", 0));
        }
        len = 0;

        /*
         * Check that the first character is proper to start
         * a new name
         */
        if (!(((c >= 0x61) && (c <= 0x7A)) ||
              ((c >= 0x41) && (c <= 0x5A)) ||
              (c == '_') || (c == ':'))) {
            int l;
            int first = CUR_SCHAR(cur, l);

            if (!IS_LETTER(first) && (first != '_')) {
                xmlFatalErrMsgStr(ctxt, XML_NS_ERR_QNAME,
                            "Name %s is not XML Namespace compliant\n",
                                  name);
            }
        }
        cur++;

        while ((c != 0) && (len < max)) { /* tested bigname2.xml */
            buf[len++] = c;
            c = *cur++;
        }
        if (len >= max) {
            /*
             * Okay someone managed to make a huge name, so he's ready to pay
             * for the processing speed.
             */
            max = len * 2;

            buffer = (xmlChar *) xmlMallocAtomic(max * sizeof(xmlChar));
            if (buffer == NULL) {
                xmlErrMemory(ctxt, NULL);
                return(NULL);
            }
            memcpy(buffer, buf, len);
            while (c != 0) { /* tested bigname2.xml */
                if (len + 10 > max) {
                    xmlChar *tmp;

                    max *= 2;
                    tmp = (xmlChar *) xmlRealloc(buffer,
                                                    max * sizeof(xmlChar));
                    if (tmp == NULL) {
                        xmlErrMemory(ctxt, NULL);
                        xmlFree(buffer);
                        return(NULL);
                    }
                    buffer = tmp;
                }
                buffer[len++] = c;
                c = *cur++;
            }
            buffer[len] = 0;
        }

        if (buffer == NULL)
            ret = xmlStrndup(buf, len);
        else {
            ret = buffer;
        }
    }

    return(ret);
}

/************************************************************************
 *                                                                      *
 *                      The parser itself                               *
 *      Relates to http://www.w3.org/TR/REC-xml                         *
 *                                                                      *
 ************************************************************************/

/************************************************************************
 *                                                                      *
 *      Routines to parse Name, NCName and NmToken                      *
 *                                                                      *
 ************************************************************************/
#ifdef DEBUG
static unsigned long nbParseName = 0;
static unsigned long nbParseNmToken = 0;
static unsigned long nbParseNCName = 0;
static unsigned long nbParseNCNameComplex = 0;
static unsigned long nbParseNameComplex = 0;
static unsigned long nbParseStringName = 0;
#endif

/*
 * The two following functions are related to the change of accepted
 * characters for Name and NmToken in the Revision 5 of XML-1.0
 * They correspond to the modified production [4] and the new production [4a]
 * changes in that revision. Also note that the macros used for the
 * productions Letter, Digit, CombiningChar and Extender are not needed
 * anymore.
 * We still keep compatibility to pre-revision5 parsing semantic if the
 * new XML_PARSE_OLD10 option is given to the parser.
 */
static int
xmlIsNameStartChar(xmlParserCtxtPtr ctxt, int c) {
    if ((ctxt->options & XML_PARSE_OLD10) == 0) {
        /*
         * Use the new checks of production [4] [4a] amd [5] of the
         * Update 5 of XML-1.0
         */
        if ((c != ' ') && (c != '>') && (c != '/') && /* accelerators */
            (((c >= 'a') && (c <= 'z')) ||
             ((c >= 'A') && (c <= 'Z')) ||
             (c == '_') || (c == ':') ||
             ((c >= 0xC0) && (c <= 0xD6)) ||
             ((c >= 0xD8) && (c <= 0xF6)) ||
             ((c >= 0xF8) && (c <= 0x2FF)) ||
             ((c >= 0x370) && (c <= 0x37D)) ||
             ((c >= 0x37F) && (c <= 0x1FFF)) ||
             ((c >= 0x200C) && (c <= 0x200D)) ||
             ((c >= 0x2070) && (c <= 0x218F)) ||
             ((c >= 0x2C00) && (c <= 0x2FEF)) ||
             ((c >= 0x3001) && (c <= 0xD7FF)) ||
             ((c >= 0xF900) && (c <= 0xFDCF)) ||
             ((c >= 0xFDF0) && (c <= 0xFFFD)) ||
             ((c >= 0x10000) && (c <= 0xEFFFF))))
            return(1);
    } else {
        if (IS_LETTER(c) || (c == '_') || (c == ':'))
            return(1);
    }
    return(0);
}

static int
xmlIsNameChar(xmlParserCtxtPtr ctxt, int c) {
    if ((ctxt->options & XML_PARSE_OLD10) == 0) {
        /*
         * Use the new checks of production [4] [4a] amd [5] of the
         * Update 5 of XML-1.0
         */
        if ((c != ' ') && (c != '>') && (c != '/') && /* accelerators */
            (((c >= 'a') && (c <= 'z')) ||
             ((c >= 'A') && (c <= 'Z')) ||
             ((c >= '0') && (c <= '9')) || /* !start */
             (c == '_') || (c == ':') ||
             (c == '-') || (c == '.') || (c == 0xB7) || /* !start */
             ((c >= 0xC0) && (c <= 0xD6)) ||
             ((c >= 0xD8) && (c <= 0xF6)) ||
             ((c >= 0xF8) && (c <= 0x2FF)) ||
             ((c >= 0x300) && (c <= 0x36F)) || /* !start */
             ((c >= 0x370) && (c <= 0x37D)) ||
             ((c >= 0x37F) && (c <= 0x1FFF)) ||
             ((c >= 0x200C) && (c <= 0x200D)) ||
             ((c >= 0x203F) && (c <= 0x2040)) || /* !start */
             ((c >= 0x2070) && (c <= 0x218F)) ||
             ((c >= 0x2C00) && (c <= 0x2FEF)) ||
             ((c >= 0x3001) && (c <= 0xD7FF)) ||
             ((c >= 0xF900) && (c <= 0xFDCF)) ||
             ((c >= 0xFDF0) && (c <= 0xFFFD)) ||
             ((c >= 0x10000) && (c <= 0xEFFFF))))
             return(1);
    } else {
        if ((IS_LETTER(c)) || (IS_DIGIT(c)) ||
            (c == '.') || (c == '-') ||
            (c == '_') || (c == ':') || 
            (IS_COMBINING(c)) ||
            (IS_EXTENDER(c)))
            return(1);
    }
    return(0);
}

static xmlChar * xmlParseAttValueInternal(xmlParserCtxtPtr ctxt,
                                          int *len, int *alloc, int normalize);

static const xmlChar *
xmlParseNameComplex(xmlParserCtxtPtr ctxt) {
    int len = 0, l;
    int c;
    int count = 0;

#ifdef DEBUG
    nbParseNameComplex++;
#endif

    /*
     * Handler for more complex cases
     */
    GROW;
    if (ctxt->instate == XML_PARSER_EOF)
        return(NULL);
    c = CUR_CHAR(l);
    if ((ctxt->options & XML_PARSE_OLD10) == 0) {
        /*
         * Use the new checks of production [4] [4a] amd [5] of the
         * Update 5 of XML-1.0
         */
        if ((c == ' ') || (c == '>') || (c == '/') || /* accelerators */
            (!(((c >= 'a') && (c <= 'z')) ||
               ((c >= 'A') && (c <= 'Z')) ||
               (c == '_') || (c == ':') ||
               ((c >= 0xC0) && (c <= 0xD6)) ||
               ((c >= 0xD8) && (c <= 0xF6)) ||
               ((c >= 0xF8) && (c <= 0x2FF)) ||
               ((c >= 0x370) && (c <= 0x37D)) ||
               ((c >= 0x37F) && (c <= 0x1FFF)) ||
               ((c >= 0x200C) && (c <= 0x200D)) ||
               ((c >= 0x2070) && (c <= 0x218F)) ||
               ((c >= 0x2C00) && (c <= 0x2FEF)) ||
               ((c >= 0x3001) && (c <= 0xD7FF)) ||
               ((c >= 0xF900) && (c <= 0xFDCF)) ||
               ((c >= 0xFDF0) && (c <= 0xFFFD)) ||
               ((c >= 0x10000) && (c <= 0xEFFFF))))) {
            return(NULL);
        }
        len += l;
        NEXTL(l);
        c = CUR_CHAR(l);
        while ((c != ' ') && (c != '>') && (c != '/') && /* accelerators */
               (((c >= 'a') && (c <= 'z')) ||
                ((c >= 'A') && (c <= 'Z')) ||
                ((c >= '0') && (c <= '9')) || /* !start */
                (c == '_') || (c == ':') ||
                (c == '-') || (c == '.') || (c == 0xB7) || /* !start */
                ((c >= 0xC0) && (c <= 0xD6)) ||
                ((c >= 0xD8) && (c <= 0xF6)) ||
                ((c >= 0xF8) && (c <= 0x2FF)) ||
                ((c >= 0x300) && (c <= 0x36F)) || /* !start */
                ((c >= 0x370) && (c <= 0x37D)) ||
                ((c >= 0x37F) && (c <= 0x1FFF)) ||
                ((c >= 0x200C) && (c <= 0x200D)) ||
                ((c >= 0x203F) && (c <= 0x2040)) || /* !start */
                ((c >= 0x2070) && (c <= 0x218F)) ||
                ((c >= 0x2C00) && (c <= 0x2FEF)) ||
                ((c >= 0x3001) && (c <= 0xD7FF)) ||
                ((c >= 0xF900) && (c <= 0xFDCF)) ||
                ((c >= 0xFDF0) && (c <= 0xFFFD)) ||
                ((c >= 0x10000) && (c <= 0xEFFFF))
                )) {
            if (count++ > 100) {
                count = 0;
                GROW;
                if (ctxt->instate == XML_PARSER_EOF)
                    return(NULL);
            }
            len += l;
            NEXTL(l);
            c = CUR_CHAR(l);
        }
    } else {
        if ((c == ' ') || (c == '>') || (c == '/') || /* accelerators */
            (!IS_LETTER(c) && (c != '_') &&
             (c != ':'))) {
            return(NULL);
        }
        len += l;
        NEXTL(l);
        c = CUR_CHAR(l);

        while ((c != ' ') && (c != '>') && (c != '/') && /* test bigname.xml */
               ((IS_LETTER(c)) || (IS_DIGIT(c)) ||
                (c == '.') || (c == '-') ||
                (c == '_') || (c == ':') || 
                (IS_COMBINING(c)) ||
                (IS_EXTENDER(c)))) {
            if (count++ > 100) {
                count = 0;
                GROW;
                if (ctxt->instate == XML_PARSER_EOF)
                    return(NULL);
            }
            len += l;
            NEXTL(l);
            c = CUR_CHAR(l);
        }
    }
    if ((*ctxt->input->cur == '\n') && (ctxt->input->cur[-1] == '\r'))
        return(xmlDictLookup(ctxt->dict, ctxt->input->cur - (len + 1), len));
    return(xmlDictLookup(ctxt->dict, ctxt->input->cur - len, len));
}

/**
 * xmlParseName:
 * @ctxt:  an XML parser context
 *
 * parse an XML name.
 *
 * [4] NameChar ::= Letter | Digit | '.' | '-' | '_' | ':' |
 *                  CombiningChar | Extender
 *
 * [5] Name ::= (Letter | '_' | ':') (NameChar)*
 *
 * [6] Names ::= Name (#x20 Name)*
 *
 * Returns the Name parsed or NULL
 */

const xmlChar *
xmlParseName(xmlParserCtxtPtr ctxt) {
    const xmlChar *in;
    const xmlChar *ret;
    int count = 0;

    GROW;

#ifdef DEBUG
    nbParseName++;
#endif

    /*
     * Accelerator for simple ASCII names
     */
    in = ctxt->input->cur;
    if (((*in >= 0x61) && (*in <= 0x7A)) ||
        ((*in >= 0x41) && (*in <= 0x5A)) ||
        (*in == '_') || (*in == ':')) {
        in++;
        while (((*in >= 0x61) && (*in <= 0x7A)) ||
               ((*in >= 0x41) && (*in <= 0x5A)) ||
               ((*in >= 0x30) && (*in <= 0x39)) ||
               (*in == '_') || (*in == '-') ||
               (*in == ':') || (*in == '.'))
            in++;
        if ((*in > 0) && (*in < 0x80)) {
            count = in - ctxt->input->cur;
            ret = xmlDictLookup(ctxt->dict, ctxt->input->cur, count);
            ctxt->input->cur = in;
            ctxt->nbChars += count;
            ctxt->input->col += count;
            if (ret == NULL)
                xmlErrMemory(ctxt, NULL);
            return(ret);
        }
    }
    /* accelerator for special cases */
    return(xmlParseNameComplex(ctxt));
}

static const xmlChar *
xmlParseNCNameComplex(xmlParserCtxtPtr ctxt) {
    int len = 0, l;
    int c;
    int count = 0;

#ifdef DEBUG
    nbParseNCNameComplex++;
#endif

    /*
     * Handler for more complex cases
     */
    GROW;
    c = CUR_CHAR(l);
    if ((c == ' ') || (c == '>') || (c == '/') || /* accelerators */
        (!xmlIsNameStartChar(ctxt, c) || (c == ':'))) {
        return(NULL);
    }

    while ((c != ' ') && (c != '>') && (c != '/') && /* test bigname.xml */
           (xmlIsNameChar(ctxt, c) && (c != ':'))) {
        if (count++ > 100) {
            count = 0;
            GROW;
            if (ctxt->instate == XML_PARSER_EOF)
                return(NULL);
        }
        len += l;
        NEXTL(l);
        c = CUR_CHAR(l);
    }
    return(xmlDictLookup(ctxt->dict, ctxt->input->cur - len, len));
}

/**
 * xmlParseNCName:
 * @ctxt:  an XML parser context
 * @len:  lenght of the string parsed
 *
 * parse an XML name.
 *
 * [4NS] NCNameChar ::= Letter | Digit | '.' | '-' | '_' |
 *                      CombiningChar | Extender
 *
 * [5NS] NCName ::= (Letter | '_') (NCNameChar)*
 *
 * Returns the Name parsed or NULL
 */

static const xmlChar *
xmlParseNCName(xmlParserCtxtPtr ctxt) {
    const xmlChar *in;
    const xmlChar *ret;
    int count = 0;

#ifdef DEBUG
    nbParseNCName++;
#endif

    /*
     * Accelerator for simple ASCII names
     */
    in = ctxt->input->cur;
    if (((*in >= 0x61) && (*in <= 0x7A)) ||
        ((*in >= 0x41) && (*in <= 0x5A)) ||
        (*in == '_')) {
        in++;
        while (((*in >= 0x61) && (*in <= 0x7A)) ||
               ((*in >= 0x41) && (*in <= 0x5A)) ||
               ((*in >= 0x30) && (*in <= 0x39)) ||
               (*in == '_') || (*in == '-') ||
               (*in == '.'))
            in++;
        if ((*in > 0) && (*in < 0x80)) {
            count = in - ctxt->input->cur;
            ret = xmlDictLookup(ctxt->dict, ctxt->input->cur, count);
            ctxt->input->cur = in;
            ctxt->nbChars += count;
            ctxt->input->col += count;
            if (ret == NULL) {
                xmlErrMemory(ctxt, NULL);
            }
            return(ret);
        }
    }
    return(xmlParseNCNameComplex(ctxt));
}

/**
 * xmlParseNameAndCompare:
 * @ctxt:  an XML parser context
 *
 * parse an XML name and compares for match
 * (specialized for endtag parsing)
 *
 * Returns NULL for an illegal name, (xmlChar*) 1 for success
 * and the name for mismatch
 */

static const xmlChar *
xmlParseNameAndCompare(xmlParserCtxtPtr ctxt, xmlChar const *other) {
    register const xmlChar *cmp = other;
    register const xmlChar *in;
    const xmlChar *ret;

    GROW;
    if (ctxt->instate == XML_PARSER_EOF)
        return(NULL);

    in = ctxt->input->cur;
    while (*in != 0 && *in == *cmp) {
        ++in;
        ++cmp;
        ctxt->input->col++;
    }
    if (*cmp == 0 && (*in == '>' || IS_BLANK_CH (*in))) {
        /* success */
        ctxt->input->cur = in;
        return (const xmlChar*) 1;
    }
    /* failure (or end of input buffer), check with full function */
    ret = xmlParseName (ctxt);
    /* strings coming from the dictionnary direct compare possible */
    if (ret == other) {
        return (const xmlChar*) 1;
    }
    return ret;
}

/**
 * xmlParseStringName:
 * @ctxt:  an XML parser context
 * @str:  a pointer to the string pointer (IN/OUT)
 *
 * parse an XML name.
 *
 * [4] NameChar ::= Letter | Digit | '.' | '-' | '_' | ':' |
 *                  CombiningChar | Extender
 *
 * [5] Name ::= (Letter | '_' | ':') (NameChar)*
 *
 * [6] Names ::= Name (#x20 Name)*
 *
 * Returns the Name parsed or NULL. The @str pointer 
 * is updated to the current location in the string.
 */

static xmlChar *
xmlParseStringName(xmlParserCtxtPtr ctxt, const xmlChar** str) {
    xmlChar buf[XML_MAX_NAMELEN + 5];
    const xmlChar *cur = *str;
    int len = 0, l;
    int c;

#ifdef DEBUG
    nbParseStringName++;
#endif

    c = CUR_SCHAR(cur, l);
    if (!xmlIsNameStartChar(ctxt, c)) {
        return(NULL);
    }

    COPY_BUF(l,buf,len,c);
    cur += l;
    c = CUR_SCHAR(cur, l);
    while (xmlIsNameChar(ctxt, c)) {
        COPY_BUF(l,buf,len,c);
        cur += l;
        c = CUR_SCHAR(cur, l);
        if (len >= XML_MAX_NAMELEN) { /* test bigentname.xml */
            /*
             * Okay someone managed to make a huge name, so he's ready to pay
             * for the processing speed.
             */
            xmlChar *buffer;
            int max = len * 2;

            buffer = (xmlChar *) xmlMallocAtomic(max * sizeof(xmlChar));
            if (buffer == NULL) {
                xmlErrMemory(ctxt, NULL);
                return(NULL);
            }
            memcpy(buffer, buf, len);
            while (xmlIsNameChar(ctxt, c)) {
                if (len + 10 > max) {
                    xmlChar *tmp;
                    max *= 2;
                    tmp = (xmlChar *) xmlRealloc(buffer,
                                                    max * sizeof(xmlChar));
                    if (tmp == NULL) {
                        xmlErrMemory(ctxt, NULL);
                        xmlFree(buffer);
                        return(NULL);
                    }
                    buffer = tmp;
                }
                COPY_BUF(l,buffer,len,c);
                cur += l;
                c = CUR_SCHAR(cur, l);
            }
            buffer[len] = 0;
            *str = cur;
            return(buffer);
        }
    }
    *str = cur;
    return(xmlStrndup(buf, len));
}

/**
 * xmlParseNmtoken:
 * @ctxt:  an XML parser context
 *
 * parse an XML Nmtoken.
 *
 * [7] Nmtoken ::= (NameChar)+
 *
 * [8] Nmtokens ::= Nmtoken (#x20 Nmtoken)*
 *
 * Returns the Nmtoken parsed or NULL
 */

xmlChar *
xmlParseNmtoken(xmlParserCtxtPtr ctxt) {
    xmlChar buf[XML_MAX_NAMELEN + 5];
    int len = 0, l;
    int c;
    int count = 0;

#ifdef DEBUG
    nbParseNmToken++;
#endif

    GROW;
    if (ctxt->instate == XML_PARSER_EOF)
        return(NULL);
    c = CUR_CHAR(l);

    while (xmlIsNameChar(ctxt, c)) {
        if (count++ > 100) {
            count = 0;
            GROW;
        }
        COPY_BUF(l,buf,len,c);
        NEXTL(l);
        c = CUR_CHAR(l);
        if (len >= XML_MAX_NAMELEN) {
            /*
             * Okay someone managed to make a huge token, so he's ready to pay
             * for the processing speed.
             */
            xmlChar *buffer;
            int max = len * 2;

            buffer = (xmlChar *) xmlMallocAtomic(max * sizeof(xmlChar));
            if (buffer == NULL) {
                xmlErrMemory(ctxt, NULL);
                return(NULL);
            }
            memcpy(buffer, buf, len);
            while (xmlIsNameChar(ctxt, c)) {
                if (count++ > 100) {
                    count = 0;
                    GROW;
                    if (ctxt->instate == XML_PARSER_EOF) {
                        xmlFree(buffer);
                        return(NULL);
                    }
                }
                if (len + 10 > max) {
                    xmlChar *tmp;

                    max *= 2;
                    tmp = (xmlChar *) xmlRealloc(buffer,
                                                    max * sizeof(xmlChar));
                    if (tmp == NULL) {
                        xmlErrMemory(ctxt, NULL);
                        xmlFree(buffer);
                        return(NULL);
                    }
                    buffer = tmp;
                }
                COPY_BUF(l,buffer,len,c);
                NEXTL(l);
                c = CUR_CHAR(l);
            }
            buffer[len] = 0;
            return(buffer);
        }
    }
    if (len == 0)
        return(NULL);
    return(xmlStrndup(buf, len));
}

/**
 * xmlParseEntityValue:
 * @ctxt:  an XML parser context
 * @orig:  if non-NULL store a copy of the original entity value
 *
 * parse a value for ENTITY declarations
 *
 * [9] EntityValue ::= '"' ([^%&"] | PEReference | Reference)* '"' |
 *                     "'" ([^%&'] | PEReference | Reference)* "'"
 *
 * Returns the EntityValue parsed with reference substituted or NULL
 */

xmlChar *
xmlParseEntityValue(xmlParserCtxtPtr ctxt, xmlChar **orig) {
    xmlChar *buf = NULL;
    int len = 0;
    int size = XML_PARSER_BUFFER_SIZE;
    int c, l;
    xmlChar stop;
    xmlChar *ret = NULL;
    const xmlChar *cur = NULL;
    xmlParserInputPtr input;

    if (RAW == '"') stop = '"';
    else if (RAW == '\'') stop = '\'';
    else {
        xmlFatalErr(ctxt, XML_ERR_ENTITY_NOT_STARTED, NULL);
        return(NULL);
    }
    buf = (xmlChar *) xmlMallocAtomic(size * sizeof(xmlChar));
    if (buf == NULL) {
        xmlErrMemory(ctxt, NULL);
        return(NULL);
    }

    /*
     * The content of the entity definition is copied in a buffer.
     */

    ctxt->instate = XML_PARSER_ENTITY_VALUE;
    input = ctxt->input;
    GROW;
    if (ctxt->instate == XML_PARSER_EOF) {
        xmlFree(buf);
        return(NULL);
    }
    NEXT;
    c = CUR_CHAR(l);
    /*
     * NOTE: 4.4.5 Included in Literal
     * When a parameter entity reference appears in a literal entity
     * value, ... a single or double quote character in the replacement
     * text is always treated as a normal data character and will not
     * terminate the literal. 
     * In practice it means we stop the loop only when back at parsing
     * the initial entity and the quote is found
     */
    while (((IS_CHAR(c)) && ((c != stop) || /* checked */
            (ctxt->input != input))) && (ctxt->instate != XML_PARSER_EOF)) {
        if (len + 5 >= size) {
            xmlChar *tmp;

            size *= 2;
            tmp = (xmlChar *) xmlRealloc(buf, size * sizeof(xmlChar));
            if (tmp == NULL) {
                xmlErrMemory(ctxt, NULL);
                xmlFree(buf);
                return(NULL);
            }
            buf = tmp;
        }
        COPY_BUF(l,buf,len,c);
        NEXTL(l);
        /*
         * Pop-up of finished entities.
         */
        while ((RAW == 0) && (ctxt->inputNr > 1)) /* non input consuming */
            xmlPopInput(ctxt);

        GROW;
        c = CUR_CHAR(l);
        if (c == 0) {
            GROW;
            c = CUR_CHAR(l);
        }
    }
    buf[len] = 0;
    if (ctxt->instate == XML_PARSER_EOF) {
        xmlFree(buf);
        return(NULL);
    }

    /*
     * Raise problem w.r.t. '&' and '%' being used in non-entities
     * reference constructs. Note Charref will be handled in
     * xmlStringDecodeEntities()
     */
    cur = buf;
    while (*cur != 0) { /* non input consuming */
        if ((*cur == '%') || ((*cur == '&') && (cur[1] != '#'))) {
            xmlChar *name;
            xmlChar tmp = *cur;

            cur++;
            name = xmlParseStringName(ctxt, &cur);
            if ((name == NULL) || (*cur != ';')) {
                xmlFatalErrMsgInt(ctxt, XML_ERR_ENTITY_CHAR_ERROR,
            "EntityValue: '%c' forbidden except for entities references\n",
                                  tmp);
            }
            if ((tmp == '%') && (ctxt->inSubset == 1) &&
                (ctxt->inputNr == 1)) {
                xmlFatalErr(ctxt, XML_ERR_ENTITY_PE_INTERNAL, NULL);
            }
            if (name != NULL)
                xmlFree(name);
            if (*cur == 0)
                break;
        }
        cur++;
    }

    /*
     * Then PEReference entities are substituted.
     */
    if (c != stop) {
        xmlFatalErr(ctxt, XML_ERR_ENTITY_NOT_FINISHED, NULL);
        xmlFree(buf);
    } else {
        NEXT;
        /*
         * NOTE: 4.4.7 Bypassed
         * When a general entity reference appears in the EntityValue in
         * an entity declaration, it is bypassed and left as is.
         * so XML_SUBSTITUTE_REF is not set here.
         */
        ret = xmlStringDecodeEntities(ctxt, buf, XML_SUBSTITUTE_PEREF,
                                      0, 0, 0);
        if (orig != NULL)
            *orig = buf;
        else
            xmlFree(buf);
    }

    return(ret);
}

/**
 * xmlParseAttValueComplex:
 * @ctxt:  an XML parser context
 * @len:   the resulting attribute len
 * @normalize:  wether to apply the inner normalization
 *
 * parse a value for an attribute, this is the fallback function
 * of xmlParseAttValue() when the attribute parsing requires handling
 * of non-ASCII characters, or normalization compaction.
 *
 * Returns the AttValue parsed or NULL. The value has to be freed by the caller.
 */
static xmlChar *
xmlParseAttValueComplex(xmlParserCtxtPtr ctxt, int *attlen, int normalize) {
    xmlChar limit = 0;
    xmlChar *buf = NULL;
    xmlChar *rep = NULL;
    int len = 0;
    int buf_size = 0;
    int c, l, in_space = 0;
    xmlChar *current = NULL;
    xmlEntityPtr ent;

    if (NXT(0) == '"') {
        ctxt->instate = XML_PARSER_ATTRIBUTE_VALUE;
        limit = '"';
        NEXT;
    } else if (NXT(0) == '\'') {
        limit = '\'';
        ctxt->instate = XML_PARSER_ATTRIBUTE_VALUE;
        NEXT;
    } else {
        xmlFatalErr(ctxt, XML_ERR_ATTRIBUTE_NOT_STARTED, NULL);
        return(NULL);
    }

    /*
     * allocate a translation buffer.
     */
    buf_size = XML_PARSER_BUFFER_SIZE;
    buf = (xmlChar *) xmlMallocAtomic(buf_size * sizeof(xmlChar));
    if (buf == NULL) goto mem_error;

    /*
     * OK loop until we reach one of the ending char or a size limit.
     */
    c = CUR_CHAR(l);
    while (((NXT(0) != limit) && /* checked */
            (IS_CHAR(c)) && (c != '<')) &&
            (ctxt->instate != XML_PARSER_EOF)) {
        if (c == 0) break;
        if (c == '&') {
            in_space = 0;
            if (NXT(1) == '#') {
                int val = xmlParseCharRef(ctxt);

                if (val == '&') {
                    if (ctxt->replaceEntities) {
                        if (len > buf_size - 10) {
                            growBuffer(buf, 10);
                        }
                        buf[len++] = '&';
                    } else {
                        /*
                         * The reparsing will be done in xmlStringGetNodeList()
                         * called by the attribute() function in SAX.c
                         */
                        if (len > buf_size - 10) {
                            growBuffer(buf, 10);
                        }
                        buf[len++] = '&';
                        buf[len++] = '#';
                        buf[len++] = '3';
                        buf[len++] = '8';
                        buf[len++] = ';';
                    }
                } else if (val != 0) {
                    if (len > buf_size - 10) {
                        growBuffer(buf, 10);
                    }
                    len += xmlCopyChar(0, &buf[len], val);
                }
            } else {
                ent = xmlParseEntityRef(ctxt);
                ctxt->nbentities++;
                if (ent != NULL)
                    ctxt->nbentities += ent->owner;
                if ((ent != NULL) &&
                    (ent->etype == XML_INTERNAL_PREDEFINED_ENTITY)) {
                    if (len > buf_size - 10) {
                        growBuffer(buf, 10);
                    }
                    if ((ctxt->replaceEntities == 0) &&
                        (ent->content[0] == '&')) {
                        buf[len++] = '&';
                        buf[len++] = '#';
                        buf[len++] = '3';
                        buf[len++] = '8';
                        buf[len++] = ';';
                    } else {
                        buf[len++] = ent->content[0];
                    }
                } else if ((ent != NULL) && 
                           (ctxt->replaceEntities != 0)) {
                    if (ent->etype != XML_INTERNAL_PREDEFINED_ENTITY) {
                        rep = xmlStringDecodeEntities(ctxt, ent->content,
                                                      XML_SUBSTITUTE_REF,
                                                      0, 0, 0);
                        if (rep != NULL) {
                            current = rep;
                            while (*current != 0) { /* non input consuming */
                                if ((*current == 0xD) || (*current == 0xA) ||
                                    (*current == 0x9)) {
                                    buf[len++] = 0x20;
                                    current++;
                                } else
                                    buf[len++] = *current++;
                                if (len > buf_size - 10) {
                                    growBuffer(buf, 10);
                                }
                            }
                            xmlFree(rep);
                            rep = NULL;
                        }
                    } else {
                        if (len > buf_size - 10) {
                            growBuffer(buf, 10);
                        }
                        if (ent->content != NULL)
                            buf[len++] = ent->content[0];
                    }
                } else if (ent != NULL) {
                    int i = xmlStrlen(ent->name);
                    const xmlChar *cur = ent->name;

                    /*
                     * This may look absurd but is needed to detect
                     * entities problems
                     */
                    if ((ent->etype != XML_INTERNAL_PREDEFINED_ENTITY) &&
                        (ent->content != NULL)) {
                        rep = xmlStringDecodeEntities(ctxt, ent->content,
                                                  XML_SUBSTITUTE_REF, 0, 0, 0);
                        if (rep != NULL) {
                            xmlFree(rep);
                            rep = NULL;
                        }
                    }

                    /*
                     * Just output the reference
                     */
                    buf[len++] = '&';
                    while (len > buf_size - i - 10) {
                        growBuffer(buf, i + 10);
                    }
                    for (;i > 0;i--)
                        buf[len++] = *cur++;
                    buf[len++] = ';';
                }
            }
        } else {
            if ((c == 0x20) || (c == 0xD) || (c == 0xA) || (c == 0x9)) {
                if ((len != 0) || (!normalize)) {
                    if ((!normalize) || (!in_space)) {
                        COPY_BUF(l,buf,len,0x20);
                        while (len > buf_size - 10) {
                            growBuffer(buf, 10);
                        }
                    }
                    in_space = 1;
                }
            } else {
                in_space = 0;
                COPY_BUF(l,buf,len,c);
                if (len > buf_size - 10) {
                    growBuffer(buf, 10);
                }
            }
            NEXTL(l);
        }
        GROW;
        c = CUR_CHAR(l);
    }
    if (ctxt->instate == XML_PARSER_EOF)
        goto error;

    if ((in_space) && (normalize)) {
        while ((len > 0) && (buf[len - 1] == 0x20)) len--;
    }
    buf[len] = 0;
    if (RAW == '<') {
        xmlFatalErr(ctxt, XML_ERR_LT_IN_ATTRIBUTE, NULL);
    } else if (RAW != limit) {
        if ((c != 0) && (!IS_CHAR(c))) {
            xmlFatalErrMsg(ctxt, XML_ERR_INVALID_CHAR,
                           "invalid character in attribute value\n");
        } else {
            xmlFatalErrMsg(ctxt, XML_ERR_ATTRIBUTE_NOT_FINISHED,
                           "AttValue: ' expected\n");
        }
    } else
        NEXT;
    if (attlen != NULL) *attlen = len;
    return(buf);

mem_error:
    xmlErrMemory(ctxt, NULL);
error:
    if (buf != NULL)
        xmlFree(buf);
    if (rep != NULL)
        xmlFree(rep);
    return(NULL);
}

/**
 * xmlParseAttValue:
 * @ctxt:  an XML parser context
 *
 * parse a value for an attribute
 * Note: the parser won't do substitution of entities here, this
 * will be handled later in xmlStringGetNodeList
 *
 * [10] AttValue ::= '"' ([^<&"] | Reference)* '"' |
 *                   "'" ([^<&'] | Reference)* "'"
 *
 * 3.3.3 Attribute-Value Normalization:
 * Before the value of an attribute is passed to the application or
 * checked for validity, the XML processor must normalize it as follows: 
 * - a character reference is processed by appending the referenced
 *   character to the attribute value
 * - an entity reference is processed by recursively processing the
 *   replacement text of the entity 
 * - a whitespace character (#x20, #xD, #xA, #x9) is processed by
 *   appending #x20 to the normalized value, except that only a single
 *   #x20 is appended for a "#xD#xA" sequence that is part of an external
 *   parsed entity or the literal entity value of an internal parsed entity 
 * - other characters are processed by appending them to the normalized value 
 * If the declared value is not CDATA, then the XML processor must further
 * process the normalized attribute value by discarding any leading and
 * trailing space (#x20) characters, and by replacing sequences of space
 * (#x20) characters by a single space (#x20) character.  
 * All attributes for which no declaration has been read should be treated
 * by a non-validating parser as if declared CDATA.
 *
 * Returns the AttValue parsed or NULL. The value has to be freed by the caller.
 */


xmlChar *
xmlParseAttValue(xmlParserCtxtPtr ctxt) {
    if ((ctxt == NULL) || (ctxt->input == NULL)) return(NULL);
    return(xmlParseAttValueInternal(ctxt, NULL, NULL, 0));
}

/**
 * xmlParseSystemLiteral:
 * @ctxt:  an XML parser context
 * 
 * parse an XML Literal
 *
 * [11] SystemLiteral ::= ('"' [^"]* '"') | ("'" [^']* "'")
 *
 * Returns the SystemLiteral parsed or NULL
 */

xmlChar *
xmlParseSystemLiteral(xmlParserCtxtPtr ctxt) {
    xmlChar *buf = NULL;
    int len = 0;
    int size = XML_PARSER_BUFFER_SIZE;
    int cur, l;
    xmlChar stop;
    int state = ctxt->instate;
    int count = 0;

    SHRINK;
    if (RAW == '"') {
        NEXT;
        stop = '"';
    } else if (RAW == '\'') {
        NEXT;
        stop = '\'';
    } else {
        xmlFatalErr(ctxt, XML_ERR_LITERAL_NOT_STARTED, NULL);
        return(NULL);
    }
    
    buf = (xmlChar *) xmlMallocAtomic(size * sizeof(xmlChar));
    if (buf == NULL) {
        xmlErrMemory(ctxt, NULL);
        return(NULL);
    }
    ctxt->instate = XML_PARSER_SYSTEM_LITERAL;
    cur = CUR_CHAR(l);
    while ((IS_CHAR(cur)) && (cur != stop)) { /* checked */
        if (len + 5 >= size) {
            xmlChar *tmp;

            size *= 2;
            tmp = (xmlChar *) xmlRealloc(buf, size * sizeof(xmlChar));
            if (tmp == NULL) {
                xmlFree(buf);
                xmlErrMemory(ctxt, NULL);
                ctxt->instate = (xmlParserInputState) state;
                return(NULL);
            }
            buf = tmp;
        }
        count++;
        if (count > 50) {
            GROW;
            count = 0;
            if (ctxt->instate == XML_PARSER_EOF) {
                xmlFree(buf);
                return(NULL);
            }
        }
        COPY_BUF(l,buf,len,cur);
        NEXTL(l);
        cur = CUR_CHAR(l);
        if (cur == 0) {
            GROW;
            SHRINK;
            cur = CUR_CHAR(l);
        }
    }
    buf[len] = 0;
    ctxt->instate = (xmlParserInputState) state;
    if (!IS_CHAR(cur)) {
        xmlFatalErr(ctxt, XML_ERR_LITERAL_NOT_FINISHED, NULL);
    } else {
        NEXT;
    }
    return(buf);
}

/**
 * xmlParsePubidLiteral:
 * @ctxt:  an XML parser context
 *
 * parse an XML public literal
 *
 * [12] PubidLiteral ::= '"' PubidChar* '"' | "'" (PubidChar - "'")* "'"
 *
 * Returns the PubidLiteral parsed or NULL.
 */

xmlChar *
xmlParsePubidLiteral(xmlParserCtxtPtr ctxt) {
    xmlChar *buf = NULL;
    int len = 0;
    int size = XML_PARSER_BUFFER_SIZE;
    xmlChar cur;
    xmlChar stop;
    int count = 0;
    xmlParserInputState oldstate = ctxt->instate;

    SHRINK;
    if (RAW == '"') {
        NEXT;
        stop = '"';
    } else if (RAW == '\'') {
        NEXT;
        stop = '\'';
    } else {
        xmlFatalErr(ctxt, XML_ERR_LITERAL_NOT_STARTED, NULL);
        return(NULL);
    }
    buf = (xmlChar *) xmlMallocAtomic(size * sizeof(xmlChar));
    if (buf == NULL) {
        xmlErrMemory(ctxt, NULL);
        return(NULL);
    }
    ctxt->instate = XML_PARSER_PUBLIC_LITERAL;
    cur = CUR;
    while ((IS_PUBIDCHAR_CH(cur)) && (cur != stop)) { /* checked */
        if (len + 1 >= size) {
            xmlChar *tmp;

            size *= 2;
            tmp = (xmlChar *) xmlRealloc(buf, size * sizeof(xmlChar));
            if (tmp == NULL) {
                xmlErrMemory(ctxt, NULL);
                xmlFree(buf);
                return(NULL);
            }
            buf = tmp;
        }
        buf[len++] = cur;
        count++;
        if (count > 50) {
            GROW;
            count = 0;
            if (ctxt->instate == XML_PARSER_EOF) {
                xmlFree(buf);
                return(NULL);
            }
        }
        NEXT;
        cur = CUR;
        if (cur == 0) {
            GROW;
            SHRINK;
            cur = CUR;
        }
    }
    buf[len] = 0;
    if (cur != stop) {
        xmlFatalErr(ctxt, XML_ERR_LITERAL_NOT_FINISHED, NULL);
    } else {
        NEXT;
    }
    ctxt->instate = oldstate;
    return(buf);
}

static void xmlParseCharDataComplex(xmlParserCtxtPtr ctxt, int cdata);

/*
 * used for the test in the inner loop of the char data testing
 */
static const unsigned char test_char_data[256] = {
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x9, CR/LF separated */
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x00, 0x27, /* & */
    0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
    0x38, 0x39, 0x3A, 0x3B, 0x00, 0x3D, 0x3E, 0x3F, /* < */
    0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
    0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
    0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
    0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x00, 0x5E, 0x5F, /* ] */
    0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
    0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
    0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
    0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* non-ascii */
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

/**
 * xmlParseCharData:
 * @ctxt:  an XML parser context
 * @cdata:  int indicating whether we are within a CDATA section
 *
 * parse a CharData section.
 * if we are within a CDATA section ']]>' marks an end of section.
 *
 * The right angle bracket (>) may be represented using the string "&gt;",
 * and must, for compatibility, be escaped using "&gt;" or a character
 * reference when it appears in the string "]]>" in content, when that
 * string is not marking the end of a CDATA section. 
 *
 * [14] CharData ::= [^<&]* - ([^<&]* ']]>' [^<&]*)
 */

void
xmlParseCharData(xmlParserCtxtPtr ctxt, int cdata) {
    const xmlChar *in;
    int nbchar = 0;
    int line = ctxt->input->line;
    int col = ctxt->input->col;
    int ccol;

    SHRINK;
    GROW;
    /*
     * Accelerated common case where input don't need to be
     * modified before passing it to the handler.
     */
    if (!cdata) {
        in = ctxt->input->cur;
        do {
get_more_space:
            while (*in == 0x20) { in++; ctxt->input->col++; }
            if (*in == 0xA) {
                do {
                    ctxt->input->line++; ctxt->input->col = 1;
                    in++;
                } while (*in == 0xA);
                goto get_more_space;
            }
            if (*in == '<') {
                nbchar = in - ctxt->input->cur;
                if (nbchar > 0) {
                    const xmlChar *tmp = ctxt->input->cur;
                    ctxt->input->cur = in;

                    if ((ctxt->sax != NULL) &&
                        (ctxt->sax->ignorableWhitespace !=
                         ctxt->sax->characters)) {
                        if (areBlanks(ctxt, tmp, nbchar, 1)) {
                            if (ctxt->sax->ignorableWhitespace != NULL)
                                ctxt->sax->ignorableWhitespace(ctxt->userData,
                                                       tmp, nbchar);
                        } else {
                            if (ctxt->sax->characters != NULL)
                                ctxt->sax->characters(ctxt->userData,
                                                      tmp, nbchar);
                            if (*ctxt->space == -1)
                                *ctxt->space = -2;
                        }
                    } else if ((ctxt->sax != NULL) &&
                               (ctxt->sax->characters != NULL)) {
                        ctxt->sax->characters(ctxt->userData,
                                              tmp, nbchar);
                    }
                }
                return;
            }

get_more:
            ccol = ctxt->input->col;
            while (test_char_data[*in]) {
                in++;
                ccol++;
            }
            ctxt->input->col = ccol;
            if (*in == 0xA) {
                do {
                    ctxt->input->line++; ctxt->input->col = 1;
                    in++;
                } while (*in == 0xA);
                goto get_more;
            }
            if (*in == ']') {
                if ((in[1] == ']') && (in[2] == '>')) {
                    xmlFatalErr(ctxt, XML_ERR_MISPLACED_CDATA_END, NULL);
                    ctxt->input->cur = in;
                    return;
                }
                in++;
                ctxt->input->col++;
                goto get_more;
            }
            nbchar = in - ctxt->input->cur;
            if (nbchar > 0) {
                if ((ctxt->sax != NULL) &&
                    (ctxt->sax->ignorableWhitespace !=
                     ctxt->sax->characters) &&
                    (IS_BLANK_CH(*ctxt->input->cur))) {
                    const xmlChar *tmp = ctxt->input->cur;
                    ctxt->input->cur = in;

                    if (areBlanks(ctxt, tmp, nbchar, 0)) {
                        if (ctxt->sax->ignorableWhitespace != NULL)
                            ctxt->sax->ignorableWhitespace(ctxt->userData,
                                                           tmp, nbchar);
                    } else {
                        if (ctxt->sax->characters != NULL)
                            ctxt->sax->characters(ctxt->userData,
                                                  tmp, nbchar);
                        if (*ctxt->space == -1)
                            *ctxt->space = -2;
                    }
                    line = ctxt->input->line;
                    col = ctxt->input->col;
                } else if (ctxt->sax != NULL) {
                    if (ctxt->sax->characters != NULL)
                        ctxt->sax->characters(ctxt->userData,
                                              ctxt->input->cur, nbchar);
                    line = ctxt->input->line;
                    col = ctxt->input->col;
                }
                /* something really bad happened in the SAX callback */
                if (ctxt->instate != XML_PARSER_CONTENT)
                    return;
            }
            ctxt->input->cur = in;
            if (*in == 0xD) {
                in++;
                if (*in == 0xA) {
                    ctxt->input->cur = in;
                    in++;
                    ctxt->input->line++; ctxt->input->col = 1;
                    continue; /* while */
                }
                in--;
            }
            if (*in == '<') {
                return;
            }
            if (*in == '&') {
                return;
            }
            SHRINK;
            GROW;
            if (ctxt->instate == XML_PARSER_EOF)
                return;
            in = ctxt->input->cur;
        } while (((*in >= 0x20) && (*in <= 0x7F)) || (*in == 0x09));
        nbchar = 0;
    }
    ctxt->input->line = line;
    ctxt->input->col = col;
    xmlParseCharDataComplex(ctxt, cdata);
}

/**
 * xmlParseCharDataComplex:
 * @ctxt:  an XML parser context
 * @cdata:  int indicating whether we are within a CDATA section
 *
 * parse a CharData section.this is the fallback function
 * of xmlParseCharData() when the parsing requires handling
 * of non-ASCII characters.
 */
static void
xmlParseCharDataComplex(xmlParserCtxtPtr ctxt, int cdata) {
    xmlChar buf[XML_PARSER_BIG_BUFFER_SIZE + 5];
    int nbchar = 0;
    int cur, l;
    int count = 0;

    SHRINK;
    GROW;
    cur = CUR_CHAR(l);
    while ((cur != '<') && /* checked */
           (cur != '&') && 
           (IS_CHAR(cur))) /* test also done in xmlCurrentChar() */ {
        if ((cur == ']') && (NXT(1) == ']') &&
            (NXT(2) == '>')) {
            if (cdata) break;
            else {
                xmlFatalErr(ctxt, XML_ERR_MISPLACED_CDATA_END, NULL);
            }
        }
        COPY_BUF(l,buf,nbchar,cur);
        if (nbchar >= XML_PARSER_BIG_BUFFER_SIZE) {
            buf[nbchar] = 0;

            /*
             * OK the segment is to be consumed as chars.
             */
            if ((ctxt->sax != NULL) && (!ctxt->disableSAX)) {
                if (areBlanks(ctxt, buf, nbchar, 0)) {
                    if (ctxt->sax->ignorableWhitespace != NULL)
                        ctxt->sax->ignorableWhitespace(ctxt->userData,
                                                       buf, nbchar);
                } else {
                    if (ctxt->sax->characters != NULL)
                        ctxt->sax->characters(ctxt->userData, buf, nbchar);
                    if ((ctxt->sax->characters !=
                         ctxt->sax->ignorableWhitespace) &&
                        (*ctxt->space == -1))
                        *ctxt->space = -2;
                }
            }
            nbchar = 0;
            /* something really bad happened in the SAX callback */
            if (ctxt->instate != XML_PARSER_CONTENT)
                return;
        }
        count++;
        if (count > 50) {
            GROW;
            count = 0;
            if (ctxt->instate == XML_PARSER_EOF)
                return;
        }
        NEXTL(l);
        cur = CUR_CHAR(l);
    }
    if (nbchar != 0) {
        buf[nbchar] = 0;
        /*
         * OK the segment is to be consumed as chars.
         */
        if ((ctxt->sax != NULL) && (!ctxt->disableSAX)) {
            if (areBlanks(ctxt, buf, nbchar, 0)) {
                if (ctxt->sax->ignorableWhitespace != NULL)
                    ctxt->sax->ignorableWhitespace(ctxt->userData, buf, nbchar);
            } else {
                if (ctxt->sax->characters != NULL)
                    ctxt->sax->characters(ctxt->userData, buf, nbchar);
                if ((ctxt->sax->characters != ctxt->sax->ignorableWhitespace) &&
                    (*ctxt->space == -1))
                    *ctxt->space = -2;
            }
        }
    }
    if ((cur != 0) && (!IS_CHAR(cur))) {
        /* Generate the error and skip the offending character */
        xmlFatalErrMsgInt(ctxt, XML_ERR_INVALID_CHAR,
                          "PCDATA invalid Char value %d\n",
                          cur);
        NEXTL(l);
    }
}

/**
 * xmlParseExternalID:
 * @ctxt:  an XML parser context
 * @publicID:  a xmlChar** receiving PubidLiteral
 * @strict: indicate whether we should restrict parsing to only
 *          production [75], see NOTE below
 *
 * Parse an External ID or a Public ID
 *
 * NOTE: Productions [75] and [83] interact badly since [75] can generate
 *       'PUBLIC' S PubidLiteral S SystemLiteral
 *
 * [75] ExternalID ::= 'SYSTEM' S SystemLiteral
 *                   | 'PUBLIC' S PubidLiteral S SystemLiteral
 *
 * [83] PublicID ::= 'PUBLIC' S PubidLiteral
 *
 * Returns the function returns SystemLiteral and in the second
 *                case publicID receives PubidLiteral, is strict is off
 *                it is possible to return NULL and have publicID set.
 */

xmlChar *
xmlParseExternalID(xmlParserCtxtPtr ctxt, xmlChar **publicID, int strict) {
    xmlChar *URI = NULL;

    SHRINK;

    *publicID = NULL;
    if (CMP6(CUR_PTR, 'S', 'Y', 'S', 'T', 'E', 'M')) {
        SKIP(6);
        if (!IS_BLANK_CH(CUR)) {
            xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                           "Space required after 'SYSTEM'\n");
        }
        SKIP_BLANKS;
        URI = xmlParseSystemLiteral(ctxt);
        if (URI == NULL) {
            xmlFatalErr(ctxt, XML_ERR_URI_REQUIRED, NULL);
        }
    } else if (CMP6(CUR_PTR, 'P', 'U', 'B', 'L', 'I', 'C')) {
        SKIP(6);
        if (!IS_BLANK_CH(CUR)) {
            xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                    "Space required after 'PUBLIC'\n");
        }
        SKIP_BLANKS;
        *publicID = xmlParsePubidLiteral(ctxt);
        if (*publicID == NULL) {
            xmlFatalErr(ctxt, XML_ERR_PUBID_REQUIRED, NULL);
        }
        if (strict) {
            /*
             * We don't handle [83] so "S SystemLiteral" is required.
             */
            if (!IS_BLANK_CH(CUR)) {
                xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                        "Space required after the Public Identifier\n");
            }
        } else {
            /*
             * We handle [83] so we return immediately, if 
             * "S SystemLiteral" is not detected. From a purely parsing
             * point of view that's a nice mess.
             */
            const xmlChar *ptr;
            GROW;

            ptr = CUR_PTR;
            if (!IS_BLANK_CH(*ptr)) return(NULL);
            
            while (IS_BLANK_CH(*ptr)) ptr++; /* TODO: dangerous, fix ! */
            if ((*ptr != '\'') && (*ptr != '"')) return(NULL);
        }
        SKIP_BLANKS;
        URI = xmlParseSystemLiteral(ctxt);
        if (URI == NULL) {
            xmlFatalErr(ctxt, XML_ERR_URI_REQUIRED, NULL);
        }
    }
    return(URI);
}

/**
 * xmlParseCommentComplex:
 * @ctxt:  an XML parser context
 * @buf:  the already parsed part of the buffer
 * @len:  number of bytes filles in the buffer
 * @size:  allocated size of the buffer
 *
 * Skip an XML (SGML) comment <!-- .... -->
 *  The spec says that "For compatibility, the string "--" (double-hyphen)
 *  must not occur within comments. "
 * This is the slow routine in case the accelerator for ascii didn't work
 *
 * [15] Comment ::= '<!--' ((Char - '-') | ('-' (Char - '-')))* '-->'
 */
static void
xmlParseCommentComplex(xmlParserCtxtPtr ctxt, xmlChar *buf, int len, int size) {
    int q, ql;
    int r, rl;
    int cur, l;
    int count = 0;
    int inputid;

    inputid = ctxt->input->id;

    if (buf == NULL) {
        len = 0;
        size = XML_PARSER_BUFFER_SIZE;
        buf = (xmlChar *) xmlMallocAtomic(size * sizeof(xmlChar));
        if (buf == NULL) {
            xmlErrMemory(ctxt, NULL);
            return;
        }
    }
    GROW;       /* Assure there's enough input data */
    q = CUR_CHAR(ql);
    if (q == 0)
        goto not_terminated;
    if (!IS_CHAR(q)) {
        xmlFatalErrMsgInt(ctxt, XML_ERR_INVALID_CHAR,
                          "xmlParseComment: invalid xmlChar value %d\n",
                          q);
        xmlFree (buf);
        return;
    }
    NEXTL(ql);
    r = CUR_CHAR(rl);
    if (r == 0)
        goto not_terminated;
    if (!IS_CHAR(r)) {
        xmlFatalErrMsgInt(ctxt, XML_ERR_INVALID_CHAR,
                          "xmlParseComment: invalid xmlChar value %d\n",
                          q);
        xmlFree (buf);
        return;
    }
    NEXTL(rl);
    cur = CUR_CHAR(l);
    if (cur == 0)
        goto not_terminated;
    while (IS_CHAR(cur) && /* checked */
           ((cur != '>') ||
            (r != '-') || (q != '-'))) {
        if ((r == '-') && (q == '-')) {
            xmlFatalErr(ctxt, XML_ERR_HYPHEN_IN_COMMENT, NULL);
        }
        if (len + 5 >= size) {
            xmlChar *new_buf;
            size *= 2;
            new_buf = (xmlChar *) xmlRealloc(buf, size * sizeof(xmlChar));
            if (new_buf == NULL) {
                xmlFree (buf);
                xmlErrMemory(ctxt, NULL);
                return;
            }
            buf = new_buf;
        }
        COPY_BUF(ql,buf,len,q);
        q = r;
        ql = rl;
        r = cur;
        rl = l;

        count++;
        if (count > 50) {
            GROW;
            count = 0;
            if (ctxt->instate == XML_PARSER_EOF) {
                xmlFree(buf);
                return;
            }
        }
        NEXTL(l);
        cur = CUR_CHAR(l);
        if (cur == 0) {
            SHRINK;
            GROW;
            cur = CUR_CHAR(l);
        }
    }
    buf[len] = 0;
    if (cur == 0) {
        xmlFatalErrMsgStr(ctxt, XML_ERR_COMMENT_NOT_FINISHED,
                             "Comment not terminated \n<!--%.50s\n", buf);
    } else if (!IS_CHAR(cur)) {
        xmlFatalErrMsgInt(ctxt, XML_ERR_INVALID_CHAR,
                          "xmlParseComment: invalid xmlChar value %d\n",
                          cur);
    } else {
        if (inputid != ctxt->input->id) {
            xmlFatalErrMsg(ctxt, XML_ERR_ENTITY_BOUNDARY,
                "Comment doesn't start and stop in the same entity\n");
        }
        NEXT;
        if ((ctxt->sax != NULL) && (ctxt->sax->comment != NULL) &&
            (!ctxt->disableSAX))
            ctxt->sax->comment(ctxt->userData, buf);
    }
    xmlFree(buf);
    return;
not_terminated:
    xmlFatalErrMsgStr(ctxt, XML_ERR_COMMENT_NOT_FINISHED,
                         "Comment not terminated\n", NULL);
    xmlFree(buf);
    return;
}

/**
 * xmlParseComment:
 * @ctxt:  an XML parser context
 *
 * Skip an XML (SGML) comment <!-- .... -->
 *  The spec says that "For compatibility, the string "--" (double-hyphen)
 *  must not occur within comments. "
 *
 * [15] Comment ::= '<!--' ((Char - '-') | ('-' (Char - '-')))* '-->'
 */
void
xmlParseComment(xmlParserCtxtPtr ctxt) {
    xmlChar *buf = NULL;
    int size = XML_PARSER_BUFFER_SIZE;
    int len = 0;
    xmlParserInputState state;
    const xmlChar *in;
    int nbchar = 0, ccol;
    int inputid;

    /*
     * Check that there is a comment right here.
     */
    if ((RAW != '<') || (NXT(1) != '!') ||
        (NXT(2) != '-') || (NXT(3) != '-')) return;
    state = ctxt->instate;
    ctxt->instate = XML_PARSER_COMMENT;
    inputid = ctxt->input->id;
    SKIP(4);
    SHRINK;
    GROW;

    /*
     * Accelerated common case where input don't need to be
     * modified before passing it to the handler.
     */
    in = ctxt->input->cur;
    do {
        if (*in == 0xA) {
            do {
                ctxt->input->line++; ctxt->input->col = 1;
                in++;
            } while (*in == 0xA);
        }
get_more:
        ccol = ctxt->input->col;
        while (((*in > '-') && (*in <= 0x7F)) ||
               ((*in >= 0x20) && (*in < '-')) ||
               (*in == 0x09)) {
                    in++;
                    ccol++;
        }
        ctxt->input->col = ccol;
        if (*in == 0xA) {
            do {
                ctxt->input->line++; ctxt->input->col = 1;
                in++;
            } while (*in == 0xA);
            goto get_more;
        }
        nbchar = in - ctxt->input->cur;
        /*
         * save current set of data
         */
        if (nbchar > 0) {
            if ((ctxt->sax != NULL) &&
                (ctxt->sax->comment != NULL)) {
                if (buf == NULL) {
                    if ((*in == '-') && (in[1] == '-'))
                        size = nbchar + 1;
                    else
                        size = XML_PARSER_BUFFER_SIZE + nbchar;
                    buf = (xmlChar *) xmlMallocAtomic(size * sizeof(xmlChar));
                    if (buf == NULL) {
                        xmlErrMemory(ctxt, NULL);
                        ctxt->instate = state;
                        return;
                    }
                    len = 0;
                } else if (len + nbchar + 1 >= size) {
                    xmlChar *new_buf;
                    size  += len + nbchar + XML_PARSER_BUFFER_SIZE;
                    new_buf = (xmlChar *) xmlRealloc(buf,
                                                     size * sizeof(xmlChar));
                    if (new_buf == NULL) {
                        xmlFree (buf);
                        xmlErrMemory(ctxt, NULL);
                        ctxt->instate = state;
                        return;
                    }
                    buf = new_buf;
                }
                memcpy(&buf[len], ctxt->input->cur, nbchar);
                len += nbchar;
                buf[len] = 0;
            }
        }
        ctxt->input->cur = in;
        if (*in == 0xA) {
            in++;
            ctxt->input->line++; ctxt->input->col = 1;
        }
        if (*in == 0xD) {
            in++;
            if (*in == 0xA) {
                ctxt->input->cur = in;
                in++;
                ctxt->input->line++; ctxt->input->col = 1;
                continue; /* while */
            }
            in--;
        }
        SHRINK;
        GROW;
        if (ctxt->instate == XML_PARSER_EOF) {
            xmlFree(buf);
            return;
        }
        in = ctxt->input->cur;
        if (*in == '-') {
            if (in[1] == '-') {
                if (in[2] == '>') {
                    if (ctxt->input->id != inputid) {
                        xmlFatalErrMsg(ctxt, XML_ERR_ENTITY_BOUNDARY,
                        "comment doesn't start and stop in the same entity\n");
                    }
                    SKIP(3);
                    if ((ctxt->sax != NULL) && (ctxt->sax->comment != NULL) &&
                        (!ctxt->disableSAX)) {
                        if (buf != NULL)
                            ctxt->sax->comment(ctxt->userData, buf);
                        else
                            ctxt->sax->comment(ctxt->userData, BAD_CAST "");
                    }
                    if (buf != NULL)
                        xmlFree(buf);
                    if (ctxt->instate != XML_PARSER_EOF)
                        ctxt->instate = state;
                    return;
                }
                if (buf != NULL)
                    xmlFatalErrMsgStr(ctxt, XML_ERR_COMMENT_NOT_FINISHED,
                                      "Comment not terminated \n<!--%.50s\n",
                                      buf);
                else
                    xmlFatalErrMsgStr(ctxt, XML_ERR_COMMENT_NOT_FINISHED,
                                      "Comment not terminated \n", NULL);
                in++;
                ctxt->input->col++;
            }
            in++;
            ctxt->input->col++;
            goto get_more;
        }
    } while (((*in >= 0x20) && (*in <= 0x7F)) || (*in == 0x09));
    xmlParseCommentComplex(ctxt, buf, len, size);
    ctxt->instate = state;
    return;
}


/**
 * xmlParsePITarget:
 * @ctxt:  an XML parser context
 * 
 * parse the name of a PI
 *
 * [17] PITarget ::= Name - (('X' | 'x') ('M' | 'm') ('L' | 'l'))
 *
 * Returns the PITarget name or NULL
 */

const xmlChar *
xmlParsePITarget(xmlParserCtxtPtr ctxt) {
    const xmlChar *name;

    name = xmlParseName(ctxt);
    if ((name != NULL) &&
        ((name[0] == 'x') || (name[0] == 'X')) &&
        ((name[1] == 'm') || (name[1] == 'M')) &&
        ((name[2] == 'l') || (name[2] == 'L'))) {
        int i;
        if ((name[0] == 'x') && (name[1] == 'm') &&
            (name[2] == 'l') && (name[3] == 0)) {
            xmlFatalErrMsg(ctxt, XML_ERR_RESERVED_XML_NAME,
                 "XML declaration allowed only at the start of the document\n");
            return(name);
        } else if (name[3] == 0) {
            xmlFatalErr(ctxt, XML_ERR_RESERVED_XML_NAME, NULL);
            return(name);
        }
        for (i = 0;;i++) {
            if (xmlW3CPIs[i] == NULL) break;
            if (xmlStrEqual(name, (const xmlChar *)xmlW3CPIs[i]))
                return(name);
        }
        xmlWarningMsg(ctxt, XML_ERR_RESERVED_XML_NAME,
                      "xmlParsePITarget: invalid name prefix 'xml'\n",
                      NULL, NULL);
    }
    if ((name != NULL) && (xmlStrchr(name, ':') != NULL)) {
        xmlNsErr(ctxt, XML_NS_ERR_COLON, 
                 "colon are forbidden from PI names '%s'\n", name, NULL, NULL);
    }
    return(name);
}

#ifdef LIBXML_CATALOG_ENABLED
/**
 * xmlParseCatalogPI:
 * @ctxt:  an XML parser context
 * @catalog:  the PI value string
 * 
 * parse an XML Catalog Processing Instruction.
 *
 * <?oasis-xml-catalog catalog="http://example.com/catalog.xml"?>
 *
 * Occurs only if allowed by the user and if happening in the Misc
 * part of the document before any doctype informations
 * This will add the given catalog to the parsing context in order
 * to be used if there is a resolution need further down in the document
 */

static void
xmlParseCatalogPI(xmlParserCtxtPtr ctxt, const xmlChar *catalog) {
    xmlChar *URL = NULL;
    const xmlChar *tmp, *base;
    xmlChar marker;

    tmp = catalog;
    while (IS_BLANK_CH(*tmp)) tmp++;
    if (xmlStrncmp(tmp, BAD_CAST"catalog", 7))
        goto error;
    tmp += 7;
    while (IS_BLANK_CH(*tmp)) tmp++;
    if (*tmp != '=') {
        return;
    }
    tmp++;
    while (IS_BLANK_CH(*tmp)) tmp++;
    marker = *tmp;
    if ((marker != '\'') && (marker != '"'))
        goto error;
    tmp++;
    base = tmp;
    while ((*tmp != 0) && (*tmp != marker)) tmp++;
    if (*tmp == 0)
        goto error;
    URL = xmlStrndup(base, tmp - base);
    tmp++;
    while (IS_BLANK_CH(*tmp)) tmp++;
    if (*tmp != 0)
        goto error;

    if (URL != NULL) {
        ctxt->catalogs = xmlCatalogAddLocal(ctxt->catalogs, URL);
        xmlFree(URL);
    }
    return;

error:
    xmlWarningMsg(ctxt, XML_WAR_CATALOG_PI,
                  "Catalog PI syntax error: %s\n",
                  catalog, NULL);
    if (URL != NULL)
        xmlFree(URL);
}
#endif

/**
 * xmlParsePI:
 * @ctxt:  an XML parser context
 * 
 * parse an XML Processing Instruction.
 *
 * [16] PI ::= '<?' PITarget (S (Char* - (Char* '?>' Char*)))? '?>'
 *
 * The processing is transfered to SAX once parsed.
 */

void
xmlParsePI(xmlParserCtxtPtr ctxt) {
    xmlChar *buf = NULL;
    int len = 0;
    int size = XML_PARSER_BUFFER_SIZE;
    int cur, l;
    const xmlChar *target;
    xmlParserInputState state;
    int count = 0;

    if ((RAW == '<') && (NXT(1) == '?')) {
        xmlParserInputPtr input = ctxt->input;
        state = ctxt->instate;
        ctxt->instate = XML_PARSER_PI;
        /*
         * this is a Processing Instruction.
         */
        SKIP(2);
        SHRINK;

        /*
         * Parse the target name and check for special support like
         * namespace.
         */
        target = xmlParsePITarget(ctxt);
        if (target != NULL) {
            if ((RAW == '?') && (NXT(1) == '>')) {
                if (input != ctxt->input) {
                    xmlFatalErrMsg(ctxt, XML_ERR_ENTITY_BOUNDARY,
            "PI declaration doesn't start and stop in the same entity\n");
                }
                SKIP(2);

                /*
                 * SAX: PI detected.
                 */
                if ((ctxt->sax) && (!ctxt->disableSAX) &&
                    (ctxt->sax->processingInstruction != NULL))
                    ctxt->sax->processingInstruction(ctxt->userData,
                                                     target, NULL);
                if (ctxt->instate != XML_PARSER_EOF)
                    ctxt->instate = state;
                return;
            }
            buf = (xmlChar *) xmlMallocAtomic(size * sizeof(xmlChar));
            if (buf == NULL) {
                xmlErrMemory(ctxt, NULL);
                ctxt->instate = state;
                return;
            }
            cur = CUR;
            if (!IS_BLANK(cur)) {
                xmlFatalErrMsgStr(ctxt, XML_ERR_SPACE_REQUIRED,
                          "ParsePI: PI %s space expected\n", target);
            }
            SKIP_BLANKS;
            cur = CUR_CHAR(l);
            while (IS_CHAR(cur) && /* checked */
                   ((cur != '?') || (NXT(1) != '>'))) {
                if (len + 5 >= size) {
                    xmlChar *tmp;

                    size *= 2;
                    tmp = (xmlChar *) xmlRealloc(buf, size * sizeof(xmlChar));
                    if (tmp == NULL) {
                        xmlErrMemory(ctxt, NULL);
                        xmlFree(buf);
                        ctxt->instate = state;
                        return;
                    }
                    buf = tmp;
                }
                count++;
                if (count > 50) {
                    GROW;
                    if (ctxt->instate == XML_PARSER_EOF) {
                        xmlFree(buf);
                        return;
                    }
                    count = 0;
                }
                COPY_BUF(l,buf,len,cur);
                NEXTL(l);
                cur = CUR_CHAR(l);
                if (cur == 0) {
                    SHRINK;
                    GROW;
                    cur = CUR_CHAR(l);
                }
            }
            buf[len] = 0;
            if (cur != '?') {
                xmlFatalErrMsgStr(ctxt, XML_ERR_PI_NOT_FINISHED,
                      "ParsePI: PI %s never end ...\n", target);
            } else {
                if (input != ctxt->input) {
                    xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
            "PI declaration doesn't start and stop in the same entity\n");
                }
                SKIP(2);

#ifdef LIBXML_CATALOG_ENABLED
                if (((state == XML_PARSER_MISC) ||
                     (state == XML_PARSER_START)) &&
                    (xmlStrEqual(target, XML_CATALOG_PI))) {
                    xmlCatalogAllow allow = xmlCatalogGetDefaults();
                    if ((allow == XML_CATA_ALLOW_DOCUMENT) ||
                        (allow == XML_CATA_ALLOW_ALL))
                        xmlParseCatalogPI(ctxt, buf);
                }
#endif


                /*
                 * SAX: PI detected.
                 */
                if ((ctxt->sax) && (!ctxt->disableSAX) &&
                    (ctxt->sax->processingInstruction != NULL))
                    ctxt->sax->processingInstruction(ctxt->userData,
                                                     target, buf);
            }
            xmlFree(buf);
        } else {
            xmlFatalErr(ctxt, XML_ERR_PI_NOT_STARTED, NULL);
        }
        if (ctxt->instate != XML_PARSER_EOF)
            ctxt->instate = state;
    }
}

/**
 * xmlParseNotationDecl:
 * @ctxt:  an XML parser context
 *
 * parse a notation declaration
 *
 * [82] NotationDecl ::= '<!NOTATION' S Name S (ExternalID |  PublicID) S? '>'
 *
 * Hence there is actually 3 choices:
 *     'PUBLIC' S PubidLiteral
 *     'PUBLIC' S PubidLiteral S SystemLiteral
 * and 'SYSTEM' S SystemLiteral
 *
 * See the NOTE on xmlParseExternalID().
 */

void
xmlParseNotationDecl(xmlParserCtxtPtr ctxt) {
    const xmlChar *name;
    xmlChar *Pubid;
    xmlChar *Systemid;
    
    if (CMP10(CUR_PTR, '<', '!', 'N', 'O', 'T', 'A', 'T', 'I', 'O', 'N')) {
        xmlParserInputPtr input = ctxt->input;
        SHRINK;
        SKIP(10);
        if (!IS_BLANK_CH(CUR)) {
            xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                           "Space required after '<!NOTATION'\n");
            return;
        }
        SKIP_BLANKS;

        name = xmlParseName(ctxt);
        if (name == NULL) {
            xmlFatalErr(ctxt, XML_ERR_NOTATION_NOT_STARTED, NULL);
            return;
        }
        if (!IS_BLANK_CH(CUR)) {
            xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                     "Space required after the NOTATION name'\n");
            return;
        }
        if (xmlStrchr(name, ':') != NULL) {
            xmlNsErr(ctxt, XML_NS_ERR_COLON, 
                     "colon are forbidden from notation names '%s'\n",
                     name, NULL, NULL);
        }
        SKIP_BLANKS;

        /*
         * Parse the IDs.
         */
        Systemid = xmlParseExternalID(ctxt, &Pubid, 0);
        SKIP_BLANKS;

        if (RAW == '>') {
            if (input != ctxt->input) {
                xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
        "Notation declaration doesn't start and stop in the same entity\n");
            }
            NEXT;
            if ((ctxt->sax != NULL) && (!ctxt->disableSAX) &&
                (ctxt->sax->notationDecl != NULL))
                ctxt->sax->notationDecl(ctxt->userData, name, Pubid, Systemid);
        } else {
            xmlFatalErr(ctxt, XML_ERR_NOTATION_NOT_FINISHED, NULL);
        }
        if (Systemid != NULL) xmlFree(Systemid);
        if (Pubid != NULL) xmlFree(Pubid);
    }
}

/**
 * xmlParseEntityDecl:
 * @ctxt:  an XML parser context
 *
 * parse <!ENTITY declarations
 *
 * [70] EntityDecl ::= GEDecl | PEDecl
 *
 * [71] GEDecl ::= '<!ENTITY' S Name S EntityDef S? '>'
 *
 * [72] PEDecl ::= '<!ENTITY' S '%' S Name S PEDef S? '>'
 *
 * [73] EntityDef ::= EntityValue | (ExternalID NDataDecl?)
 *
 * [74] PEDef ::= EntityValue | ExternalID
 *
 * [76] NDataDecl ::= S 'NDATA' S Name
 *
 * [ VC: Notation Declared ]
 * The Name must match the declared name of a notation.
 */

void
xmlParseEntityDecl(xmlParserCtxtPtr ctxt) {
    const xmlChar *name = NULL;
    xmlChar *value = NULL;
    xmlChar *URI = NULL, *literal = NULL;
    const xmlChar *ndata = NULL;
    int isParameter = 0;
    xmlChar *orig = NULL;
    int skipped;
    
    /* GROW; done in the caller */
    if (CMP8(CUR_PTR, '<', '!', 'E', 'N', 'T', 'I', 'T', 'Y')) {
        xmlParserInputPtr input = ctxt->input;
        SHRINK;
        SKIP(8);
        skipped = SKIP_BLANKS;
        if (skipped == 0) {
            xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                           "Space required after '<!ENTITY'\n");
        }

        if (RAW == '%') {
            NEXT;
            skipped = SKIP_BLANKS;
            if (skipped == 0) {
                xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                               "Space required after '%'\n");
            }
            isParameter = 1;
        }

        name = xmlParseName(ctxt);
        if (name == NULL) {
            xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
                           "xmlParseEntityDecl: no name\n");
            return;
        }
        if (xmlStrchr(name, ':') != NULL) {
            xmlNsErr(ctxt, XML_NS_ERR_COLON, 
                     "colon are forbidden from entities names '%s'\n",
                     name, NULL, NULL);
        }
        skipped = SKIP_BLANKS;
        if (skipped == 0) {
            xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                           "Space required after the entity name\n");
        }

        ctxt->instate = XML_PARSER_ENTITY_DECL;
        /*
         * handle the various case of definitions...
         */
        if (isParameter) {
            if ((RAW == '"') || (RAW == '\'')) {
                value = xmlParseEntityValue(ctxt, &orig);
                if (value) {
                    if ((ctxt->sax != NULL) &&
                        (!ctxt->disableSAX) && (ctxt->sax->entityDecl != NULL))
                        ctxt->sax->entityDecl(ctxt->userData, name,
                                    XML_INTERNAL_PARAMETER_ENTITY,
                                    NULL, NULL, value);
                }
            } else {
                URI = xmlParseExternalID(ctxt, &literal, 1);
                if ((URI == NULL) && (literal == NULL)) {
                    xmlFatalErr(ctxt, XML_ERR_VALUE_REQUIRED, NULL);
                }
                if (URI) {
                    xmlURIPtr uri;

                    uri = xmlParseURI((const char *) URI);
                    if (uri == NULL) {
                        xmlErrMsgStr(ctxt, XML_ERR_INVALID_URI,
                                     "Invalid URI: %s\n", URI);
                        /*
                         * This really ought to be a well formedness error
                         * but the XML Core WG decided otherwise c.f. issue
                         * E26 of the XML erratas.
                         */
                    } else {
                        if (uri->fragment != NULL) {
                            /*
                             * Okay this is foolish to block those but not
                             * invalid URIs.
                             */
                            xmlFatalErr(ctxt, XML_ERR_URI_FRAGMENT, NULL);
                        } else {
                            if ((ctxt->sax != NULL) &&
                                (!ctxt->disableSAX) &&
                                (ctxt->sax->entityDecl != NULL))
                                ctxt->sax->entityDecl(ctxt->userData, name,
                                            XML_EXTERNAL_PARAMETER_ENTITY,
                                            literal, URI, NULL);
                        }
                        xmlFreeURI(uri);
                    }
                }
            }
        } else {
            if ((RAW == '"') || (RAW == '\'')) {
                value = xmlParseEntityValue(ctxt, &orig);
                if ((ctxt->sax != NULL) &&
                    (!ctxt->disableSAX) && (ctxt->sax->entityDecl != NULL))
                    ctxt->sax->entityDecl(ctxt->userData, name,
                                XML_INTERNAL_GENERAL_ENTITY,
                                NULL, NULL, value);
                /*
                 * For expat compatibility in SAX mode.
                 */
                if ((ctxt->myDoc == NULL) ||
                    (xmlStrEqual(ctxt->myDoc->version, SAX_COMPAT_MODE))) {
                    if (ctxt->myDoc == NULL) {
                        ctxt->myDoc = xmlNewDoc(SAX_COMPAT_MODE);
                        if (ctxt->myDoc == NULL) {
                            xmlErrMemory(ctxt, "New Doc failed");
                            return;
                        }
                        ctxt->myDoc->properties = XML_DOC_INTERNAL;
                    }
                    if (ctxt->myDoc->intSubset == NULL)
                        ctxt->myDoc->intSubset = xmlNewDtd(ctxt->myDoc,
                                            BAD_CAST "fake", NULL, NULL);

                    xmlSAX2EntityDecl(ctxt, name, XML_INTERNAL_GENERAL_ENTITY,
                                      NULL, NULL, value);
                }
            } else {
                URI = xmlParseExternalID(ctxt, &literal, 1);
                if ((URI == NULL) && (literal == NULL)) {
                    xmlFatalErr(ctxt, XML_ERR_VALUE_REQUIRED, NULL);
                }
                if (URI) {
                    xmlURIPtr uri;

                    uri = xmlParseURI((const char *)URI);
                    if (uri == NULL) {
                        xmlErrMsgStr(ctxt, XML_ERR_INVALID_URI,
                                     "Invalid URI: %s\n", URI);
                        /*
                         * This really ought to be a well formedness error
                         * but the XML Core WG decided otherwise c.f. issue
                         * E26 of the XML erratas.
                         */
                    } else {
                        if (uri->fragment != NULL) {
                            /*
                             * Okay this is foolish to block those but not
                             * invalid URIs.
                             */
                            xmlFatalErr(ctxt, XML_ERR_URI_FRAGMENT, NULL);
                        }
                        xmlFreeURI(uri);
                    }
                }
                if ((RAW != '>') && (!IS_BLANK_CH(CUR))) {
                    xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                                   "Space required before 'NDATA'\n");
                }
                SKIP_BLANKS;
                if (CMP5(CUR_PTR, 'N', 'D', 'A', 'T', 'A')) {
                    SKIP(5);
                    if (!IS_BLANK_CH(CUR)) {
                        xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                                       "Space required after 'NDATA'\n");
                    }
                    SKIP_BLANKS;
                    ndata = xmlParseName(ctxt);
                    if ((ctxt->sax != NULL) && (!ctxt->disableSAX) &&
                        (ctxt->sax->unparsedEntityDecl != NULL))
                        ctxt->sax->unparsedEntityDecl(ctxt->userData, name,
                                    literal, URI, ndata);
                } else {
                    if ((ctxt->sax != NULL) &&
                        (!ctxt->disableSAX) && (ctxt->sax->entityDecl != NULL))
                        ctxt->sax->entityDecl(ctxt->userData, name,
                                    XML_EXTERNAL_GENERAL_PARSED_ENTITY,
                                    literal, URI, NULL);
                    /*
                     * For expat compatibility in SAX mode.
                     * assuming the entity repalcement was asked for
                     */
                    if ((ctxt->replaceEntities != 0) &&
                        ((ctxt->myDoc == NULL) ||
                        (xmlStrEqual(ctxt->myDoc->version, SAX_COMPAT_MODE)))) {
                        if (ctxt->myDoc == NULL) {
                            ctxt->myDoc = xmlNewDoc(SAX_COMPAT_MODE);
                            if (ctxt->myDoc == NULL) {
                                xmlErrMemory(ctxt, "New Doc failed");
                                return;
                            }
                            ctxt->myDoc->properties = XML_DOC_INTERNAL;
                        }

                        if (ctxt->myDoc->intSubset == NULL)
                            ctxt->myDoc->intSubset = xmlNewDtd(ctxt->myDoc,
                                                BAD_CAST "fake", NULL, NULL);
                        xmlSAX2EntityDecl(ctxt, name,
                                          XML_EXTERNAL_GENERAL_PARSED_ENTITY,
                                          literal, URI, NULL);
                    }
                }
            }
        }
        if (ctxt->instate == XML_PARSER_EOF)
            return;
        SKIP_BLANKS;
        if (RAW != '>') {
            xmlFatalErrMsgStr(ctxt, XML_ERR_ENTITY_NOT_FINISHED,
                    "xmlParseEntityDecl: entity %s not terminated\n", name);
        } else {
            if (input != ctxt->input) {
                xmlFatalErrMsg(ctxt, XML_ERR_ENTITY_BOUNDARY,
        "Entity declaration doesn't start and stop in the same entity\n");
            }
            NEXT;
        }
        if (orig != NULL) {
            /*
             * Ugly mechanism to save the raw entity value.
             */
            xmlEntityPtr cur = NULL;

            if (isParameter) {
                if ((ctxt->sax != NULL) &&
                    (ctxt->sax->getParameterEntity != NULL))
                    cur = ctxt->sax->getParameterEntity(ctxt->userData, name);
            } else {
                if ((ctxt->sax != NULL) &&
                    (ctxt->sax->getEntity != NULL))
                    cur = ctxt->sax->getEntity(ctxt->userData, name);
                if ((cur == NULL) && (ctxt->userData==ctxt)) {
                    cur = xmlSAX2GetEntity(ctxt, name);
                }
            }
            if (cur != NULL) {
                if (cur->orig != NULL)
                    xmlFree(orig);
                else
                    cur->orig = orig;
            } else
                xmlFree(orig);
        }
        if (value != NULL) xmlFree(value);
        if (URI != NULL) xmlFree(URI);
        if (literal != NULL) xmlFree(literal);
    }
}

/**
 * xmlParseDefaultDecl:
 * @ctxt:  an XML parser context
 * @value:  Receive a possible fixed default value for the attribute
 *
 * Parse an attribute default declaration
 *
 * [60] DefaultDecl ::= '#REQUIRED' | '#IMPLIED' | (('#FIXED' S)? AttValue)
 *
 * [ VC: Required Attribute ]
 * if the default declaration is the keyword #REQUIRED, then the
 * attribute must be specified for all elements of the type in the
 * attribute-list declaration.
 *
 * [ VC: Attribute Default Legal ]
 * The declared default value must meet the lexical constraints of
 * the declared attribute type c.f. xmlValidateAttributeDecl()
 *
 * [ VC: Fixed Attribute Default ]
 * if an attribute has a default value declared with the #FIXED
 * keyword, instances of that attribute must match the default value. 
 *
 * [ WFC: No < in Attribute Values ]
 * handled in xmlParseAttValue()
 *
 * returns: XML_ATTRIBUTE_NONE, XML_ATTRIBUTE_REQUIRED, XML_ATTRIBUTE_IMPLIED
 *          or XML_ATTRIBUTE_FIXED. 
 */

int
xmlParseDefaultDecl(xmlParserCtxtPtr ctxt, xmlChar **value) {
    int val;
    xmlChar *ret;

    *value = NULL;
    if (CMP9(CUR_PTR, '#', 'R', 'E', 'Q', 'U', 'I', 'R', 'E', 'D')) {
        SKIP(9);
        return(XML_ATTRIBUTE_REQUIRED);
    }
    if (CMP8(CUR_PTR, '#', 'I', 'M', 'P', 'L', 'I', 'E', 'D')) {
        SKIP(8);
        return(XML_ATTRIBUTE_IMPLIED);
    }
    val = XML_ATTRIBUTE_NONE;
    if (CMP6(CUR_PTR, '#', 'F', 'I', 'X', 'E', 'D')) {
        SKIP(6);
        val = XML_ATTRIBUTE_FIXED;
        if (!IS_BLANK_CH(CUR)) {
            xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                           "Space required after '#FIXED'\n");
        }
        SKIP_BLANKS;
    }
    ret = xmlParseAttValue(ctxt);
    ctxt->instate = XML_PARSER_DTD;
    if (ret == NULL) {
        xmlFatalErrMsg(ctxt, (xmlParserErrors)ctxt->errNo,
                       "Attribute default value declaration error\n");
    } else
        *value = ret;
    return(val);
}

/**
 * xmlParseNotationType:
 * @ctxt:  an XML parser context
 *
 * parse an Notation attribute type.
 *
 * Note: the leading 'NOTATION' S part has already being parsed...
 *
 * [58] NotationType ::= 'NOTATION' S '(' S? Name (S? '|' S? Name)* S? ')'
 *
 * [ VC: Notation Attributes ]
 * Values of this type must match one of the notation names included
 * in the declaration; all notation names in the declaration must be declared. 
 *
 * Returns: the notation attribute tree built while parsing
 */

xmlEnumerationPtr
xmlParseNotationType(xmlParserCtxtPtr ctxt) {
    const xmlChar *name;
    xmlEnumerationPtr ret = NULL, last = NULL, cur, tmp;

    if (RAW != '(') {
        xmlFatalErr(ctxt, XML_ERR_NOTATION_NOT_STARTED, NULL);
        return(NULL);
    }
    SHRINK;
    do {
        NEXT;
        SKIP_BLANKS;
        name = xmlParseName(ctxt);
        if (name == NULL) {
            xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
                           "Name expected in NOTATION declaration\n");
            xmlFreeEnumeration(ret);
            return(NULL);
        }
        tmp = ret;
        while (tmp != NULL) {
            if (xmlStrEqual(name, tmp->name)) {
                xmlValidityError(ctxt, XML_DTD_DUP_TOKEN,
          "standalone: attribute notation value token %s duplicated\n",
                                 name, NULL);
                if (!xmlDictOwns(ctxt->dict, name))
                    xmlFree((xmlChar *) name);
                break;
            }
            tmp = tmp->next;
        }
        if (tmp == NULL) {
            cur = xmlCreateEnumeration(name);
            if (cur == NULL) {
                xmlFreeEnumeration(ret);
                return(NULL);
            }
            if (last == NULL) ret = last = cur;
            else {
                last->next = cur;
                last = cur;
            }
        }
        SKIP_BLANKS;
    } while (RAW == '|');
    if (RAW != ')') {
        xmlFatalErr(ctxt, XML_ERR_NOTATION_NOT_FINISHED, NULL);
        xmlFreeEnumeration(ret);
        return(NULL);
    }
    NEXT;
    return(ret);
}

/**
 * xmlParseEnumerationType:
 * @ctxt:  an XML parser context
 *
 * parse an Enumeration attribute type.
 *
 * [59] Enumeration ::= '(' S? Nmtoken (S? '|' S? Nmtoken)* S? ')'
 *
 * [ VC: Enumeration ]
 * Values of this type must match one of the Nmtoken tokens in
 * the declaration
 *
 * Returns: the enumeration attribute tree built while parsing
 */

xmlEnumerationPtr
xmlParseEnumerationType(xmlParserCtxtPtr ctxt) {
    xmlChar *name;
    xmlEnumerationPtr ret = NULL, last = NULL, cur, tmp;

    if (RAW != '(') {
        xmlFatalErr(ctxt, XML_ERR_ATTLIST_NOT_STARTED, NULL);
        return(NULL);
    }
    SHRINK;
    do {
        NEXT;
        SKIP_BLANKS;
        name = xmlParseNmtoken(ctxt);
        if (name == NULL) {
            xmlFatalErr(ctxt, XML_ERR_NMTOKEN_REQUIRED, NULL);
            return(ret);
        }
        tmp = ret;
        while (tmp != NULL) {
            if (xmlStrEqual(name, tmp->name)) {
                xmlValidityError(ctxt, XML_DTD_DUP_TOKEN,
          "standalone: attribute enumeration value token %s duplicated\n",
                                 name, NULL);
                if (!xmlDictOwns(ctxt->dict, name))
                    xmlFree(name);
                break;
            }
            tmp = tmp->next;
        }
        if (tmp == NULL) {
            cur = xmlCreateEnumeration(name);
            if (!xmlDictOwns(ctxt->dict, name))
                xmlFree(name);
            if (cur == NULL) {
                xmlFreeEnumeration(ret);
                return(NULL);
            }
            if (last == NULL) ret = last = cur;
            else {
                last->next = cur;
                last = cur;
            }
        }
        SKIP_BLANKS;
    } while (RAW == '|');
    if (RAW != ')') {
        xmlFatalErr(ctxt, XML_ERR_ATTLIST_NOT_FINISHED, NULL);
        return(ret);
    }
    NEXT;
    return(ret);
}

/**
 * xmlParseEnumeratedType:
 * @ctxt:  an XML parser context
 * @tree:  the enumeration tree built while parsing
 *
 * parse an Enumerated attribute type.
 *
 * [57] EnumeratedType ::= NotationType | Enumeration
 *
 * [58] NotationType ::= 'NOTATION' S '(' S? Name (S? '|' S? Name)* S? ')'
 *
 *
 * Returns: XML_ATTRIBUTE_ENUMERATION or XML_ATTRIBUTE_NOTATION
 */

int
xmlParseEnumeratedType(xmlParserCtxtPtr ctxt, xmlEnumerationPtr *tree) {
    if (CMP8(CUR_PTR, 'N', 'O', 'T', 'A', 'T', 'I', 'O', 'N')) {
        SKIP(8);
        if (!IS_BLANK_CH(CUR)) {
            xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                           "Space required after 'NOTATION'\n");
            return(0);
        }
        SKIP_BLANKS;
        *tree = xmlParseNotationType(ctxt);
        if (*tree == NULL) return(0);
        return(XML_ATTRIBUTE_NOTATION);
    }
    *tree = xmlParseEnumerationType(ctxt);
    if (*tree == NULL) return(0);
    return(XML_ATTRIBUTE_ENUMERATION);
}

/**
 * xmlParseAttributeType:
 * @ctxt:  an XML parser context
 * @tree:  the enumeration tree built while parsing
 *
 * parse the Attribute list def for an element
 *
 * [54] AttType ::= StringType | TokenizedType | EnumeratedType
 *
 * [55] StringType ::= 'CDATA'
 *
 * [56] TokenizedType ::= 'ID' | 'IDREF' | 'IDREFS' | 'ENTITY' |
 *                        'ENTITIES' | 'NMTOKEN' | 'NMTOKENS'
 *
 * Validity constraints for attribute values syntax are checked in
 * xmlValidateAttributeValue()
 *
 * [ VC: ID ]
 * Values of type ID must match the Name production. A name must not
 * appear more than once in an XML document as a value of this type;
 * i.e., ID values must uniquely identify the elements which bear them.
 *
 * [ VC: One ID per Element Type ]
 * No element type may have more than one ID attribute specified.
 *
 * [ VC: ID Attribute Default ]
 * An ID attribute must have a declared default of #IMPLIED or #REQUIRED.
 *
 * [ VC: IDREF ]
 * Values of type IDREF must match the Name production, and values
 * of type IDREFS must match Names; each IDREF Name must match the value
 * of an ID attribute on some element in the XML document; i.e. IDREF
 * values must match the value of some ID attribute.
 *
 * [ VC: Entity Name ]
 * Values of type ENTITY must match the Name production, values
 * of type ENTITIES must match Names; each Entity Name must match the
 * name of an unparsed entity declared in the DTD.  
 *
 * [ VC: Name Token ]
 * Values of type NMTOKEN must match the Nmtoken production; values
 * of type NMTOKENS must match Nmtokens. 
 *
 * Returns the attribute type
 */
int 
xmlParseAttributeType(xmlParserCtxtPtr ctxt, xmlEnumerationPtr *tree) {
    SHRINK;
    if (CMP5(CUR_PTR, 'C', 'D', 'A', 'T', 'A')) {
        SKIP(5);
        return(XML_ATTRIBUTE_CDATA);
     } else if (CMP6(CUR_PTR, 'I', 'D', 'R', 'E', 'F', 'S')) {
        SKIP(6);
        return(XML_ATTRIBUTE_IDREFS);
     } else if (CMP5(CUR_PTR, 'I', 'D', 'R', 'E', 'F')) {
        SKIP(5);
        return(XML_ATTRIBUTE_IDREF);
     } else if ((RAW == 'I') && (NXT(1) == 'D')) {
        SKIP(2);
        return(XML_ATTRIBUTE_ID);
     } else if (CMP6(CUR_PTR, 'E', 'N', 'T', 'I', 'T', 'Y')) {
        SKIP(6);
        return(XML_ATTRIBUTE_ENTITY);
     } else if (CMP8(CUR_PTR, 'E', 'N', 'T', 'I', 'T', 'I', 'E', 'S')) {
        SKIP(8);
        return(XML_ATTRIBUTE_ENTITIES);
     } else if (CMP8(CUR_PTR, 'N', 'M', 'T', 'O', 'K', 'E', 'N', 'S')) {
        SKIP(8);
        return(XML_ATTRIBUTE_NMTOKENS);
     } else if (CMP7(CUR_PTR, 'N', 'M', 'T', 'O', 'K', 'E', 'N')) {
        SKIP(7);
        return(XML_ATTRIBUTE_NMTOKEN);
     }
     return(xmlParseEnumeratedType(ctxt, tree));
}

/**
 * xmlParseAttributeListDecl:
 * @ctxt:  an XML parser context
 *
 * : parse the Attribute list def for an element
 *
 * [52] AttlistDecl ::= '<!ATTLIST' S Name AttDef* S? '>'
 *
 * [53] AttDef ::= S Name S AttType S DefaultDecl
 *
 */
void
xmlParseAttributeListDecl(xmlParserCtxtPtr ctxt) {
    const xmlChar *elemName;
    const xmlChar *attrName;
    xmlEnumerationPtr tree;

    if (CMP9(CUR_PTR, '<', '!', 'A', 'T', 'T', 'L', 'I', 'S', 'T')) {
        xmlParserInputPtr input = ctxt->input;

        SKIP(9);
        if (!IS_BLANK_CH(CUR)) {
            xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                                 "Space required after '<!ATTLIST'\n");
        }
        SKIP_BLANKS;
        elemName = xmlParseName(ctxt);
        if (elemName == NULL) {
            xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
                           "ATTLIST: no name for Element\n");
            return;
        }
        SKIP_BLANKS;
        GROW;
        while ((RAW != '>') && (ctxt->instate != XML_PARSER_EOF)) {
            const xmlChar *check = CUR_PTR;
            int type;
            int def;
            xmlChar *defaultValue = NULL;

            GROW;
            tree = NULL;
            attrName = xmlParseName(ctxt);
            if (attrName == NULL) {
                xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
                               "ATTLIST: no name for Attribute\n");
                break;
            }
            GROW;
            if (!IS_BLANK_CH(CUR)) {
                xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                        "Space required after the attribute name\n");
                break;
            }
            SKIP_BLANKS;

            type = xmlParseAttributeType(ctxt, &tree);
            if (type <= 0) {
                break;
            }

            GROW;
            if (!IS_BLANK_CH(CUR)) {
                xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                               "Space required after the attribute type\n");
                if (tree != NULL)
                    xmlFreeEnumeration(tree);
                break;
            }
            SKIP_BLANKS;

            def = xmlParseDefaultDecl(ctxt, &defaultValue);
            if (def <= 0) {
                if (defaultValue != NULL)
                    xmlFree(defaultValue);
                if (tree != NULL)
                    xmlFreeEnumeration(tree);
                break;
            }
            if ((type != XML_ATTRIBUTE_CDATA) && (defaultValue != NULL))
                xmlAttrNormalizeSpace(defaultValue, defaultValue);

            GROW;
            if (RAW != '>') {
                if (!IS_BLANK_CH(CUR)) {
                    xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                        "Space required after the attribute default value\n");
                    if (defaultValue != NULL)
                        xmlFree(defaultValue);
                    if (tree != NULL)
                        xmlFreeEnumeration(tree);
                    break;
                }
                SKIP_BLANKS;
            }
            if (check == CUR_PTR) {
                xmlFatalErr(ctxt, XML_ERR_INTERNAL_ERROR,
                            "in xmlParseAttributeListDecl\n");
                if (defaultValue != NULL)
                    xmlFree(defaultValue);
                if (tree != NULL)
                    xmlFreeEnumeration(tree);
                break;
            }
            if ((ctxt->sax != NULL) && (!ctxt->disableSAX) &&
                (ctxt->sax->attributeDecl != NULL))
                ctxt->sax->attributeDecl(ctxt->userData, elemName, attrName,
                                type, def, defaultValue, tree);
            else if (tree != NULL)
                xmlFreeEnumeration(tree);

            if ((ctxt->sax2) && (defaultValue != NULL) &&
                (def != XML_ATTRIBUTE_IMPLIED) && 
                (def != XML_ATTRIBUTE_REQUIRED)) {
                xmlAddDefAttrs(ctxt, elemName, attrName, defaultValue);
            }
            if (ctxt->sax2) {
                xmlAddSpecialAttr(ctxt, elemName, attrName, type);
            }
            if (defaultValue != NULL)
                xmlFree(defaultValue);
            GROW;
        }
        if (RAW == '>') {
            if (input != ctxt->input) {
                xmlValidityError(ctxt, XML_ERR_ENTITY_BOUNDARY,
    "Attribute list declaration doesn't start and stop in the same entity\n",
                                 NULL, NULL);
            }
            NEXT;
        }
    }
}

/**
 * xmlParseElementMixedContentDecl:
 * @ctxt:  an XML parser context
 * @inputchk:  the input used for the current entity, needed for boundary checks
 *
 * parse the declaration for a Mixed Element content
 * The leading '(' and spaces have been skipped in xmlParseElementContentDecl
 * 
 * [51] Mixed ::= '(' S? '#PCDATA' (S? '|' S? Name)* S? ')*' |
 *                '(' S? '#PCDATA' S? ')'
 *
 * [ VC: Proper Group/PE Nesting ] applies to [51] too (see [49])
 *
 * [ VC: No Duplicate Types ]
 * The same name must not appear more than once in a single
 * mixed-content declaration. 
 *
 * returns: the list of the xmlElementContentPtr describing the element choices
 */
xmlElementContentPtr
xmlParseElementMixedContentDecl(xmlParserCtxtPtr ctxt, int inputchk) {
    xmlElementContentPtr ret = NULL, cur = NULL, n;
    const xmlChar *elem = NULL;

    GROW;
    if (CMP7(CUR_PTR, '#', 'P', 'C', 'D', 'A', 'T', 'A')) {
        SKIP(7);
        SKIP_BLANKS;
        SHRINK;
        if (RAW == ')') {
            if ((ctxt->validate) && (ctxt->input->id != inputchk)) {
                xmlValidityError(ctxt, XML_ERR_ENTITY_BOUNDARY,
"Element content declaration doesn't start and stop in the same entity\n",
                                 NULL, NULL);
            }
            NEXT;
            ret = xmlNewDocElementContent(ctxt->myDoc, NULL, XML_ELEMENT_CONTENT_PCDATA);
            if (ret == NULL)
                return(NULL);
            if (RAW == '*') {
                ret->ocur = XML_ELEMENT_CONTENT_MULT;
                NEXT;
            }
            return(ret);
        }
        if ((RAW == '(') || (RAW == '|')) {
            ret = cur = xmlNewDocElementContent(ctxt->myDoc, NULL, XML_ELEMENT_CONTENT_PCDATA);
            if (ret == NULL) return(NULL);
        }
        while ((RAW == '|') && (ctxt->instate != XML_PARSER_EOF)) {
            NEXT;
            if (elem == NULL) {
                ret = xmlNewDocElementContent(ctxt->myDoc, NULL, XML_ELEMENT_CONTENT_OR);
                if (ret == NULL) return(NULL);
                ret->c1 = cur;
                if (cur != NULL)
                    cur->parent = ret;
                cur = ret;
            } else {
                n = xmlNewDocElementContent(ctxt->myDoc, NULL, XML_ELEMENT_CONTENT_OR);
                if (n == NULL) return(NULL);
                n->c1 = xmlNewDocElementContent(ctxt->myDoc, elem, XML_ELEMENT_CONTENT_ELEMENT);
                if (n->c1 != NULL)
                    n->c1->parent = n;
                cur->c2 = n;
                if (n != NULL)
                    n->parent = cur;
                cur = n;
            }
            SKIP_BLANKS;
            elem = xmlParseName(ctxt);
            if (elem == NULL) {
                xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
                        "xmlParseElementMixedContentDecl : Name expected\n");
                xmlFreeDocElementContent(ctxt->myDoc, cur);
                return(NULL);
            }
            SKIP_BLANKS;
            GROW;
        }
        if ((RAW == ')') && (NXT(1) == '*')) {
            if (elem != NULL) {
                cur->c2 = xmlNewDocElementContent(ctxt->myDoc, elem,
                                               XML_ELEMENT_CONTENT_ELEMENT);
                if (cur->c2 != NULL)
                    cur->c2->parent = cur;
            }
            if (ret != NULL)
                ret->ocur = XML_ELEMENT_CONTENT_MULT;
            if ((ctxt->validate) && (ctxt->input->id != inputchk)) {
                xmlValidityError(ctxt, XML_ERR_ENTITY_BOUNDARY,
"Element content declaration doesn't start and stop in the same entity\n",
                                 NULL, NULL);
            }
            SKIP(2);
        } else {
            xmlFreeDocElementContent(ctxt->myDoc, ret);
            xmlFatalErr(ctxt, XML_ERR_MIXED_NOT_STARTED, NULL);
            return(NULL);
        }

    } else {
        xmlFatalErr(ctxt, XML_ERR_PCDATA_REQUIRED, NULL);
    }
    return(ret);
}

/**
 * xmlParseElementChildrenContentDeclPriv:
 * @ctxt:  an XML parser context
 * @inputchk:  the input used for the current entity, needed for boundary checks
 * @depth: the level of recursion
 *
 * parse the declaration for a Mixed Element content
 * The leading '(' and spaces have been skipped in xmlParseElementContentDecl
 * 
 *
 * [47] children ::= (choice | seq) ('?' | '*' | '+')?
 *
 * [48] cp ::= (Name | choice | seq) ('?' | '*' | '+')?
 *
 * [49] choice ::= '(' S? cp ( S? '|' S? cp )* S? ')'
 *
 * [50] seq ::= '(' S? cp ( S? ',' S? cp )* S? ')'
 *
 * [ VC: Proper Group/PE Nesting ] applies to [49] and [50]
 * TODO Parameter-entity replacement text must be properly nested
 *      with parenthesized groups. That is to say, if either of the
 *      opening or closing parentheses in a choice, seq, or Mixed
 *      construct is contained in the replacement text for a parameter
 *      entity, both must be contained in the same replacement text. For
 *      interoperability, if a parameter-entity reference appears in a
 *      choice, seq, or Mixed construct, its replacement text should not
 *      be empty, and neither the first nor last non-blank character of
 *      the replacement text should be a connector (| or ,).
 *
 * Returns the tree of xmlElementContentPtr describing the element 
 *          hierarchy.
 */
static xmlElementContentPtr
xmlParseElementChildrenContentDeclPriv(xmlParserCtxtPtr ctxt, int inputchk,
                                       int depth) {
    xmlElementContentPtr ret = NULL, cur = NULL, last = NULL, op = NULL;
    const xmlChar *elem;
    xmlChar type = 0;

    if (((depth > 128) && ((ctxt->options & XML_PARSE_HUGE) == 0)) ||
        (depth >  2048)) {
        xmlFatalErrMsgInt(ctxt, XML_ERR_ELEMCONTENT_NOT_FINISHED,
"xmlParseElementChildrenContentDecl : depth %d too deep, use XML_PARSE_HUGE\n",
                          depth);
        return(NULL);
    }
    SKIP_BLANKS;
    GROW;
    if (RAW == '(') {
        int inputid = ctxt->input->id;

        /* Recurse on first child */
        NEXT;
        SKIP_BLANKS;
        cur = ret = xmlParseElementChildrenContentDeclPriv(ctxt, inputid,
                                                           depth + 1);
        SKIP_BLANKS;
        GROW;
    } else {
        elem = xmlParseName(ctxt);
        if (elem == NULL) {
            xmlFatalErr(ctxt, XML_ERR_ELEMCONTENT_NOT_STARTED, NULL);
            return(NULL);
        }
        cur = ret = xmlNewDocElementContent(ctxt->myDoc, elem, XML_ELEMENT_CONTENT_ELEMENT);
        if (cur == NULL) {
            xmlErrMemory(ctxt, NULL);
            return(NULL);
        }
        GROW;
        if (RAW == '?') {
            cur->ocur = XML_ELEMENT_CONTENT_OPT;
            NEXT;
        } else if (RAW == '*') {
            cur->ocur = XML_ELEMENT_CONTENT_MULT;
            NEXT;
        } else if (RAW == '+') {
            cur->ocur = XML_ELEMENT_CONTENT_PLUS;
            NEXT;
        } else {
            cur->ocur = XML_ELEMENT_CONTENT_ONCE;
        }
        GROW;
    }
    SKIP_BLANKS;
    SHRINK;
    while ((RAW != ')') && (ctxt->instate != XML_PARSER_EOF)) {
        /*
         * Each loop we parse one separator and one element.
         */
        if (RAW == ',') {
            if (type == 0) type = CUR;

            /*
             * Detect "Name | Name , Name" error
             */
            else if (type != CUR) {
                xmlFatalErrMsgInt(ctxt, XML_ERR_SEPARATOR_REQUIRED,
                    "xmlParseElementChildrenContentDecl : '%c' expected\n",
                                  type);
                if ((last != NULL) && (last != ret))
                    xmlFreeDocElementContent(ctxt->myDoc, last);
                if (ret != NULL)
                    xmlFreeDocElementContent(ctxt->myDoc, ret);
                return(NULL);
            }
            NEXT;

            op = xmlNewDocElementContent(ctxt->myDoc, NULL, XML_ELEMENT_CONTENT_SEQ);
            if (op == NULL) {
                if ((last != NULL) && (last != ret))
                    xmlFreeDocElementContent(ctxt->myDoc, last);
                xmlFreeDocElementContent(ctxt->myDoc, ret);
                return(NULL);
            }
            if (last == NULL) {
                op->c1 = ret;
                if (ret != NULL)
                    ret->parent = op;
                ret = cur = op;
            } else {
                cur->c2 = op;
                if (op != NULL)
                    op->parent = cur;
                op->c1 = last;
                if (last != NULL)
                    last->parent = op;
                cur =op;
                last = NULL;
            }
        } else if (RAW == '|') {
            if (type == 0) type = CUR;

            /*
             * Detect "Name , Name | Name" error
             */
            else if (type != CUR) {
                xmlFatalErrMsgInt(ctxt, XML_ERR_SEPARATOR_REQUIRED,
                    "xmlParseElementChildrenContentDecl : '%c' expected\n",
                                  type);
                if ((last != NULL) && (last != ret))
                    xmlFreeDocElementContent(ctxt->myDoc, last);
                if (ret != NULL)
                    xmlFreeDocElementContent(ctxt->myDoc, ret);
                return(NULL);
            }
            NEXT;

            op = xmlNewDocElementContent(ctxt->myDoc, NULL, XML_ELEMENT_CONTENT_OR);
            if (op == NULL) {
                if ((last != NULL) && (last != ret))
                    xmlFreeDocElementContent(ctxt->myDoc, last);
                if (ret != NULL)
                    xmlFreeDocElementContent(ctxt->myDoc, ret);
                return(NULL);
            }
            if (last == NULL) {
                op->c1 = ret;
                if (ret != NULL)
                    ret->parent = op;
                ret = cur = op;
            } else {
                cur->c2 = op;
                if (op != NULL)
                    op->parent = cur;
                op->c1 = last;
                if (last != NULL)
                    last->parent = op;
                cur =op;
                last = NULL;
            }
        } else {
            xmlFatalErr(ctxt, XML_ERR_ELEMCONTENT_NOT_FINISHED, NULL);
            if ((last != NULL) && (last != ret))
                xmlFreeDocElementContent(ctxt->myDoc, last);
            if (ret != NULL)
                xmlFreeDocElementContent(ctxt->myDoc, ret);
            return(NULL);
        }
        GROW;
        SKIP_BLANKS;
        GROW;
        if (RAW == '(') {
            int inputid = ctxt->input->id;
            /* Recurse on second child */
            NEXT;
            SKIP_BLANKS;
            last = xmlParseElementChildrenContentDeclPriv(ctxt, inputid,
                                                          depth + 1);
            SKIP_BLANKS;
        } else {
            elem = xmlParseName(ctxt);
            if (elem == NULL) {
                xmlFatalErr(ctxt, XML_ERR_ELEMCONTENT_NOT_STARTED, NULL);
                if (ret != NULL)
                    xmlFreeDocElementContent(ctxt->myDoc, ret);
                return(NULL);
            }
            last = xmlNewDocElementContent(ctxt->myDoc, elem, XML_ELEMENT_CONTENT_ELEMENT);
            if (last == NULL) {
                if (ret != NULL)
                    xmlFreeDocElementContent(ctxt->myDoc, ret);
                return(NULL);
            }
            if (RAW == '?') {
                last->ocur = XML_ELEMENT_CONTENT_OPT;
                NEXT;
            } else if (RAW == '*') {
                last->ocur = XML_ELEMENT_CONTENT_MULT;
                NEXT;
            } else if (RAW == '+') {
                last->ocur = XML_ELEMENT_CONTENT_PLUS;
                NEXT;
            } else {
                last->ocur = XML_ELEMENT_CONTENT_ONCE;
            }
        }
        SKIP_BLANKS;
        GROW;
    }
    if ((cur != NULL) && (last != NULL)) {
        cur->c2 = last;
        if (last != NULL)
            last->parent = cur;
    }
    if ((ctxt->validate) && (ctxt->input->id != inputchk)) {
        xmlValidityError(ctxt, XML_ERR_ENTITY_BOUNDARY,
"Element content declaration doesn't start and stop in the same entity\n",
                         NULL, NULL);
    }
    NEXT;
    if (RAW == '?') {
        if (ret != NULL) {
            if ((ret->ocur == XML_ELEMENT_CONTENT_PLUS) ||
                (ret->ocur == XML_ELEMENT_CONTENT_MULT))
                ret->ocur = XML_ELEMENT_CONTENT_MULT;
            else
                ret->ocur = XML_ELEMENT_CONTENT_OPT;
        }
        NEXT;
    } else if (RAW == '*') {
        if (ret != NULL) {
            ret->ocur = XML_ELEMENT_CONTENT_MULT;
            cur = ret;
            /*
             * Some normalization:
             * (a | b* | c?)* == (a | b | c)*
             */
            while ((cur != NULL) && (cur->type == XML_ELEMENT_CONTENT_OR)) {
                if ((cur->c1 != NULL) &&
                    ((cur->c1->ocur == XML_ELEMENT_CONTENT_OPT) ||
                     (cur->c1->ocur == XML_ELEMENT_CONTENT_MULT)))
                    cur->c1->ocur = XML_ELEMENT_CONTENT_ONCE;
                if ((cur->c2 != NULL) &&
                    ((cur->c2->ocur == XML_ELEMENT_CONTENT_OPT) ||
                     (cur->c2->ocur == XML_ELEMENT_CONTENT_MULT)))
                    cur->c2->ocur = XML_ELEMENT_CONTENT_ONCE;
                cur = cur->c2;
            }
        }
        NEXT;
    } else if (RAW == '+') {
        if (ret != NULL) {
            int found = 0;

            if ((ret->ocur == XML_ELEMENT_CONTENT_OPT) ||
                (ret->ocur == XML_ELEMENT_CONTENT_MULT))
                ret->ocur = XML_ELEMENT_CONTENT_MULT;
            else
                ret->ocur = XML_ELEMENT_CONTENT_PLUS;
            /*
             * Some normalization:
             * (a | b*)+ == (a | b)*
             * (a | b?)+ == (a | b)*
             */
            while ((cur != NULL) && (cur->type == XML_ELEMENT_CONTENT_OR)) {
                if ((cur->c1 != NULL) &&
                    ((cur->c1->ocur == XML_ELEMENT_CONTENT_OPT) ||
                     (cur->c1->ocur == XML_ELEMENT_CONTENT_MULT))) {
                    cur->c1->ocur = XML_ELEMENT_CONTENT_ONCE;
                    found = 1;
                }
                if ((cur->c2 != NULL) &&
                    ((cur->c2->ocur == XML_ELEMENT_CONTENT_OPT) ||
                     (cur->c2->ocur == XML_ELEMENT_CONTENT_MULT))) {
                    cur->c2->ocur = XML_ELEMENT_CONTENT_ONCE;
                    found = 1;
                }
                cur = cur->c2;
            }
            if (found)
                ret->ocur = XML_ELEMENT_CONTENT_MULT;
        }
        NEXT;
    }
    return(ret);
}

/**
 * xmlParseElementChildrenContentDecl:
 * @ctxt:  an XML parser context
 * @inputchk:  the input used for the current entity, needed for boundary checks
 *
 * parse the declaration for a Mixed Element content
 * The leading '(' and spaces have been skipped in xmlParseElementContentDecl
 *
 * [47] children ::= (choice | seq) ('?' | '*' | '+')?
 *
 * [48] cp ::= (Name | choice | seq) ('?' | '*' | '+')?
 *
 * [49] choice ::= '(' S? cp ( S? '|' S? cp )* S? ')'
 *
 * [50] seq ::= '(' S? cp ( S? ',' S? cp )* S? ')'
 *
 * [ VC: Proper Group/PE Nesting ] applies to [49] and [50]
 * TODO Parameter-entity replacement text must be properly nested
 *      with parenthesized groups. That is to say, if either of the
 *      opening or closing parentheses in a choice, seq, or Mixed
 *      construct is contained in the replacement text for a parameter
 *      entity, both must be contained in the same replacement text. For
 *      interoperability, if a parameter-entity reference appears in a
 *      choice, seq, or Mixed construct, its replacement text should not
 *      be empty, and neither the first nor last non-blank character of
 *      the replacement text should be a connector (| or ,).
 *
 * Returns the tree of xmlElementContentPtr describing the element
 *          hierarchy.
 */
xmlElementContentPtr
xmlParseElementChildrenContentDecl(xmlParserCtxtPtr ctxt, int inputchk) {
    /* stub left for API/ABI compat */
    return(xmlParseElementChildrenContentDeclPriv(ctxt, inputchk, 1));
}

/**
 * xmlParseElementContentDecl:
 * @ctxt:  an XML parser context
 * @name:  the name of the element being defined.
 * @result:  the Element Content pointer will be stored here if any
 *
 * parse the declaration for an Element content either Mixed or Children,
 * the cases EMPTY and ANY are handled directly in xmlParseElementDecl
 * 
 * [46] contentspec ::= 'EMPTY' | 'ANY' | Mixed | children
 *
 * returns: the type of element content XML_ELEMENT_TYPE_xxx
 */

int
xmlParseElementContentDecl(xmlParserCtxtPtr ctxt, const xmlChar *name,
                           xmlElementContentPtr *result) {

    xmlElementContentPtr tree = NULL;
    int inputid = ctxt->input->id;
    int res;

    *result = NULL;

    if (RAW != '(') {
        xmlFatalErrMsgStr(ctxt, XML_ERR_ELEMCONTENT_NOT_STARTED,
                "xmlParseElementContentDecl : %s '(' expected\n", name);
        return(-1);
    }
    NEXT;
    GROW;
    if (ctxt->instate == XML_PARSER_EOF)
        return(-1);
    SKIP_BLANKS;
    if (CMP7(CUR_PTR, '#', 'P', 'C', 'D', 'A', 'T', 'A')) {
        tree = xmlParseElementMixedContentDecl(ctxt, inputid);
        res = XML_ELEMENT_TYPE_MIXED;
    } else {
        tree = xmlParseElementChildrenContentDeclPriv(ctxt, inputid, 1);
        res = XML_ELEMENT_TYPE_ELEMENT;
    }
    SKIP_BLANKS;
    *result = tree;
    return(res);
}

/**
 * xmlParseElementDecl:
 * @ctxt:  an XML parser context
 *
 * parse an Element declaration.
 *
 * [45] elementdecl ::= '<!ELEMENT' S Name S contentspec S? '>'
 *
 * [ VC: Unique Element Type Declaration ]
 * No element type may be declared more than once
 *
 * Returns the type of the element, or -1 in case of error
 */
int
xmlParseElementDecl(xmlParserCtxtPtr ctxt) {
    const xmlChar *name;
    int ret = -1;
    xmlElementContentPtr content  = NULL;

    /* GROW; done in the caller */
    if (CMP9(CUR_PTR, '<', '!', 'E', 'L', 'E', 'M', 'E', 'N', 'T')) {
        xmlParserInputPtr input = ctxt->input;

        SKIP(9);
        if (!IS_BLANK_CH(CUR)) {
            xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                           "Space required after 'ELEMENT'\n");
        }
        SKIP_BLANKS;
        name = xmlParseName(ctxt);
        if (name == NULL) {
            xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
                           "xmlParseElementDecl: no name for Element\n");
            return(-1);
        }
        while ((RAW == 0) && (ctxt->inputNr > 1))
            xmlPopInput(ctxt);
        if (!IS_BLANK_CH(CUR)) {
            xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                           "Space required after the element name\n");
        }
        SKIP_BLANKS;
        if (CMP5(CUR_PTR, 'E', 'M', 'P', 'T', 'Y')) {
            SKIP(5);
            /*
             * Element must always be empty.
             */
            ret = XML_ELEMENT_TYPE_EMPTY;
        } else if ((RAW == 'A') && (NXT(1) == 'N') &&
                   (NXT(2) == 'Y')) {
            SKIP(3);
            /*
             * Element is a generic container.
             */
            ret = XML_ELEMENT_TYPE_ANY;
        } else if (RAW == '(') {
            ret = xmlParseElementContentDecl(ctxt, name, &content);
        } else {
            /*
             * [ WFC: PEs in Internal Subset ] error handling.
             */
            if ((RAW == '%') && (ctxt->external == 0) &&
                (ctxt->inputNr == 1)) {
                xmlFatalErrMsg(ctxt, XML_ERR_PEREF_IN_INT_SUBSET,
          "PEReference: forbidden within markup decl in internal subset\n");
            } else {
                xmlFatalErrMsg(ctxt, XML_ERR_ELEMCONTENT_NOT_STARTED,
                      "xmlParseElementDecl: 'EMPTY', 'ANY' or '(' expected\n");
            }
            return(-1);
        }

        SKIP_BLANKS;
        /*
         * Pop-up of finished entities.
         */
        while ((RAW == 0) && (ctxt->inputNr > 1))
            xmlPopInput(ctxt);
        SKIP_BLANKS;

        if (RAW != '>') {
            xmlFatalErr(ctxt, XML_ERR_GT_REQUIRED, NULL);
            if (content != NULL) {
                xmlFreeDocElementContent(ctxt->myDoc, content);
            }
        } else {
            if (input != ctxt->input) {
                xmlFatalErrMsg(ctxt, XML_ERR_ENTITY_BOUNDARY,
    "Element declaration doesn't start and stop in the same entity\n");
            }
                
            NEXT;
            if ((ctxt->sax != NULL) && (!ctxt->disableSAX) &&
                (ctxt->sax->elementDecl != NULL)) {
                if (content != NULL)
                    content->parent = NULL;
                ctxt->sax->elementDecl(ctxt->userData, name, ret,
                                       content);
                if ((content != NULL) && (content->parent == NULL)) {
                    /*
                     * this is a trick: if xmlAddElementDecl is called,
                     * instead of copying the full tree it is plugged directly
                     * if called from the parser. Avoid duplicating the 
                     * interfaces or change the API/ABI
                     */
                    xmlFreeDocElementContent(ctxt->myDoc, content);
                }
            } else if (content != NULL) {
                xmlFreeDocElementContent(ctxt->myDoc, content);
            }
        }
    }
    return(ret);
}

/**
 * xmlParseConditionalSections
 * @ctxt:  an XML parser context
 *
 * [61] conditionalSect ::= includeSect | ignoreSect 
 * [62] includeSect ::= '<![' S? 'INCLUDE' S? '[' extSubsetDecl ']]>' 
 * [63] ignoreSect ::= '<![' S? 'IGNORE' S? '[' ignoreSectContents* ']]>'
 * [64] ignoreSectContents ::= Ignore ('<![' ignoreSectContents ']]>' Ignore)*
 * [65] Ignore ::= Char* - (Char* ('<![' | ']]>') Char*)
 */

static void
xmlParseConditionalSections(xmlParserCtxtPtr ctxt) {
    int id = ctxt->input->id;

    SKIP(3);
    SKIP_BLANKS;
    if (CMP7(CUR_PTR, 'I', 'N', 'C', 'L', 'U', 'D', 'E')) {
        SKIP(7);
        SKIP_BLANKS;
        if (RAW != '[') {
            xmlFatalErr(ctxt, XML_ERR_CONDSEC_INVALID, NULL);
        } else {
            if (ctxt->input->id != id) {
                xmlValidityError(ctxt, XML_ERR_ENTITY_BOUNDARY,
            "All markup of the conditional section is not in the same entity\n",
                                     NULL, NULL);
            }
            NEXT;
        }
        if (xmlParserDebugEntities) {
            if ((ctxt->input != NULL) && (ctxt->input->filename))
                xmlGenericError(xmlGenericErrorContext,
                        "%s(%d): ", ctxt->input->filename,
                        ctxt->input->line);
            xmlGenericError(xmlGenericErrorContext,
                    "Entering INCLUDE Conditional Section\n");
        }

        while (((RAW != 0) && ((RAW != ']') || (NXT(1) != ']') ||
                (NXT(2) != '>'))) && (ctxt->instate != XML_PARSER_EOF)) {
            const xmlChar *check = CUR_PTR;
            unsigned int cons = ctxt->input->consumed;

            if ((RAW == '<') && (NXT(1) == '!') && (NXT(2) == '[')) {
                xmlParseConditionalSections(ctxt);
            } else if (IS_BLANK_CH(CUR)) {
                NEXT;
            } else if (RAW == '%') {
                xmlParsePEReference(ctxt);
            } else
                xmlParseMarkupDecl(ctxt);

            /*
             * Pop-up of finished entities.
             */
            while ((RAW == 0) && (ctxt->inputNr > 1))
                xmlPopInput(ctxt);

            if ((CUR_PTR == check) && (cons == ctxt->input->consumed)) {
                xmlFatalErr(ctxt, XML_ERR_EXT_SUBSET_NOT_FINISHED, NULL);
                break;
            }
        }
        if (xmlParserDebugEntities) {
            if ((ctxt->input != NULL) && (ctxt->input->filename))
                xmlGenericError(xmlGenericErrorContext,
                        "%s(%d): ", ctxt->input->filename,
                        ctxt->input->line);
            xmlGenericError(xmlGenericErrorContext,
                    "Leaving INCLUDE Conditional Section\n");
        }

    } else if (CMP6(CUR_PTR, 'I', 'G', 'N', 'O', 'R', 'E')) {
        int state;
        xmlParserInputState instate;
        int depth = 0;

        SKIP(6);
        SKIP_BLANKS;
        if (RAW != '[') {
            xmlFatalErr(ctxt, XML_ERR_CONDSEC_INVALID, NULL);
        } else {
            if (ctxt->input->id != id) {
                xmlValidityError(ctxt, XML_ERR_ENTITY_BOUNDARY,
            "All markup of the conditional section is not in the same entity\n",
                                     NULL, NULL);
            }
            NEXT;
        }
        if (xmlParserDebugEntities) {
            if ((ctxt->input != NULL) && (ctxt->input->filename))
                xmlGenericError(xmlGenericErrorContext,
                        "%s(%d): ", ctxt->input->filename,
                        ctxt->input->line);
            xmlGenericError(xmlGenericErrorContext,
                    "Entering IGNORE Conditional Section\n");
        }

        /*
         * Parse up to the end of the conditional section
         * But disable SAX event generating DTD building in the meantime
         */
        state = ctxt->disableSAX;
        instate = ctxt->instate;
        if (ctxt->recovery == 0) ctxt->disableSAX = 1;
        ctxt->instate = XML_PARSER_IGNORE;

        while (((depth >= 0) && (RAW != 0)) &&
               (ctxt->instate != XML_PARSER_EOF)) {
          if ((RAW == '<') && (NXT(1) == '!') && (NXT(2) == '[')) {
            depth++;
            SKIP(3);
            continue;
          }
          if ((RAW == ']') && (NXT(1) == ']') && (NXT(2) == '>')) {
            if (--depth >= 0) SKIP(3);
            continue;
          }
          NEXT;
          continue;
        }

        ctxt->disableSAX = state;
        ctxt->instate = instate;

        if (xmlParserDebugEntities) {
            if ((ctxt->input != NULL) && (ctxt->input->filename))
                xmlGenericError(xmlGenericErrorContext,
                        "%s(%d): ", ctxt->input->filename,
                        ctxt->input->line);
            xmlGenericError(xmlGenericErrorContext,
                    "Leaving IGNORE Conditional Section\n");
        }

    } else {
        xmlFatalErr(ctxt, XML_ERR_CONDSEC_INVALID_KEYWORD, NULL);
    }

    if (RAW == 0)
        SHRINK;

    if (RAW == 0) {
        xmlFatalErr(ctxt, XML_ERR_CONDSEC_NOT_FINISHED, NULL);
    } else {
        if (ctxt->input->id != id) {
            xmlValidityError(ctxt, XML_ERR_ENTITY_BOUNDARY,
        "All markup of the conditional section is not in the same entity\n",
                                 NULL, NULL);
        }
        SKIP(3);
    }
}

/**
 * xmlParseMarkupDecl:
 * @ctxt:  an XML parser context
 * 
 * parse Markup declarations
 *
 * [29] markupdecl ::= elementdecl | AttlistDecl | EntityDecl |
 *                     NotationDecl | PI | Comment
 *
 * [ VC: Proper Declaration/PE Nesting ]
 * Parameter-entity replacement text must be properly nested with
 * markup declarations. That is to say, if either the first character
 * or the last character of a markup declaration (markupdecl above) is
 * contained in the replacement text for a parameter-entity reference,
 * both must be contained in the same replacement text.
 *
 * [ WFC: PEs in Internal Subset ]
 * In the internal DTD subset, parameter-entity references can occur
 * only where markup declarations can occur, not within markup declarations.
 * (This does not apply to references that occur in external parameter
 * entities or to the external subset.) 
 */
void
xmlParseMarkupDecl(xmlParserCtxtPtr ctxt) {
    GROW;
    if (CUR == '<') {
        if (NXT(1) == '!') {
            switch (NXT(2)) {
                case 'E':
                    if (NXT(3) == 'L')
                        xmlParseElementDecl(ctxt);
                    else if (NXT(3) == 'N')
                        xmlParseEntityDecl(ctxt);
                    break;
                case 'A':
                    xmlParseAttributeListDecl(ctxt);
                    break;
                case 'N':
                    xmlParseNotationDecl(ctxt);
                    break;
                case '-':
                    xmlParseComment(ctxt);
                    break;
                default:
                    /* there is an error but it will be detected later */
                    break;
            }
        } else if (NXT(1) == '?') {
            xmlParsePI(ctxt);
        }
    }
    /*
     * This is only for internal subset. On external entities,
     * the replacement is done before parsing stage
     */
    if ((ctxt->external == 0) && (ctxt->inputNr == 1))
        xmlParsePEReference(ctxt);

    /*
     * Conditional sections are allowed from entities included
     * by PE References in the internal subset.
     */
    if ((ctxt->external == 0) && (ctxt->inputNr > 1)) {
        if ((RAW == '<') && (NXT(1) == '!') && (NXT(2) == '[')) {
            xmlParseConditionalSections(ctxt);
        }
    }

    ctxt->instate = XML_PARSER_DTD;
}

/**
 * xmlParseTextDecl:
 * @ctxt:  an XML parser context
 *
 * parse an XML declaration header for external entities
 *
 * [77] TextDecl ::= '<?xml' VersionInfo? EncodingDecl S? '?>'
 */

void
xmlParseTextDecl(xmlParserCtxtPtr ctxt) {
    xmlChar *version;
    const xmlChar *encoding;

    /*
     * We know that '<?xml' is here.
     */
    if ((CMP5(CUR_PTR, '<', '?', 'x', 'm', 'l')) && (IS_BLANK_CH(NXT(5)))) {
        SKIP(5);
    } else {
        xmlFatalErr(ctxt, XML_ERR_XMLDECL_NOT_STARTED, NULL);
        return;
    }

    if (!IS_BLANK_CH(CUR)) {
        xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                       "Space needed after '<?xml'\n");
    }
    SKIP_BLANKS;

    /*
     * We may have the VersionInfo here.
     */
    version = xmlParseVersionInfo(ctxt);
    if (version == NULL)
        version = xmlCharStrdup(XML_DEFAULT_VERSION);
    else {
        if (!IS_BLANK_CH(CUR)) {
            xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                           "Space needed here\n");
        }
    }
    ctxt->input->version = version;

    /*
     * We must have the encoding declaration
     */
    encoding = xmlParseEncodingDecl(ctxt);
    if (ctxt->errNo == XML_ERR_UNSUPPORTED_ENCODING) {
        /*
         * The XML REC instructs us to stop parsing right here
         */
        return;
    }
    if ((encoding == NULL) && (ctxt->errNo == XML_ERR_OK)) {
        xmlFatalErrMsg(ctxt, XML_ERR_MISSING_ENCODING,
                       "Missing encoding in text declaration\n");
    }

    SKIP_BLANKS;
    if ((RAW == '?') && (NXT(1) == '>')) {
        SKIP(2);
    } else if (RAW == '>') {
        /* Deprecated old WD ... */
        xmlFatalErr(ctxt, XML_ERR_XMLDECL_NOT_FINISHED, NULL);
        NEXT;
    } else {
        xmlFatalErr(ctxt, XML_ERR_XMLDECL_NOT_FINISHED, NULL);
        MOVETO_ENDTAG(CUR_PTR);
        NEXT;
    }
}

/**
 * xmlParseExternalSubset:
 * @ctxt:  an XML parser context
 * @ExternalID: the external identifier
 * @SystemID: the system identifier (or URL)
 * 
 * parse Markup declarations from an external subset
 *
 * [30] extSubset ::= textDecl? extSubsetDecl
 *
 * [31] extSubsetDecl ::= (markupdecl | conditionalSect | PEReference | S) *
 */
void
xmlParseExternalSubset(xmlParserCtxtPtr ctxt, const xmlChar *ExternalID,
                       const xmlChar *SystemID) {
    xmlDetectSAX2(ctxt);
    GROW;

    if ((ctxt->encoding == (const xmlChar *)XML_CHAR_ENCODING_NONE) &&
        (ctxt->input->end - ctxt->input->cur >= 4)) {
        xmlChar start[4];
        xmlCharEncoding enc;

        start[0] = RAW;
        start[1] = NXT(1);
        start[2] = NXT(2);
        start[3] = NXT(3);
        enc = xmlDetectCharEncoding(start, 4);
        if (enc != XML_CHAR_ENCODING_NONE)
            xmlSwitchEncoding(ctxt, enc);
    }

    if (CMP5(CUR_PTR, '<', '?', 'x', 'm', 'l')) {
        xmlParseTextDecl(ctxt);
        if (ctxt->errNo == XML_ERR_UNSUPPORTED_ENCODING) {
            /*
             * The XML REC instructs us to stop parsing right here
             */
            ctxt->instate = XML_PARSER_EOF;
            return;
        }
    }
    if (ctxt->myDoc == NULL) {
        ctxt->myDoc = xmlNewDoc(BAD_CAST "1.0");
        if (ctxt->myDoc == NULL) {
            xmlErrMemory(ctxt, "New Doc failed");
            return;
        }
        ctxt->myDoc->properties = XML_DOC_INTERNAL;
    }
    if ((ctxt->myDoc != NULL) && (ctxt->myDoc->intSubset == NULL))
        xmlCreateIntSubset(ctxt->myDoc, NULL, ExternalID, SystemID);

    ctxt->instate = XML_PARSER_DTD;
    ctxt->external = 1;
    while (((RAW == '<') && (NXT(1) == '?')) ||
           ((RAW == '<') && (NXT(1) == '!')) ||
           (RAW == '%') || IS_BLANK_CH(CUR)) {
        const xmlChar *check = CUR_PTR;
        unsigned int cons = ctxt->input->consumed;

        GROW;
        if ((RAW == '<') && (NXT(1) == '!') && (NXT(2) == '[')) {
            xmlParseConditionalSections(ctxt);
        } else if (IS_BLANK_CH(CUR)) {
            NEXT;
        } else if (RAW == '%') {
            xmlParsePEReference(ctxt);
        } else
            xmlParseMarkupDecl(ctxt);

        /*
         * Pop-up of finished entities.
         */
        while ((RAW == 0) && (ctxt->inputNr > 1))
            xmlPopInput(ctxt);

        if ((CUR_PTR == check) && (cons == ctxt->input->consumed)) {
            xmlFatalErr(ctxt, XML_ERR_EXT_SUBSET_NOT_FINISHED, NULL);
            break;
        }
    }

    if (RAW != 0) {
        xmlFatalErr(ctxt, XML_ERR_EXT_SUBSET_NOT_FINISHED, NULL);
    }

}

/**
 * xmlParseReference:
 * @ctxt:  an XML parser context
 *
 * parse and handle entity references in content, depending on the SAX
 * interface, this may end-up in a call to character() if this is a
 * CharRef, a predefined entity, if there is no reference() callback.
 * or if the parser was asked to switch to that mode.
 *
 * [67] Reference ::= EntityRef | CharRef
 */
void
xmlParseReference(xmlParserCtxtPtr ctxt) {
    xmlEntityPtr ent;
    xmlChar *val;
    int was_checked;
    xmlNodePtr list = NULL;
    xmlParserErrors ret = XML_ERR_OK;


    if (RAW != '&')
        return;

    /*
     * Simple case of a CharRef
     */
    if (NXT(1) == '#') {
        int i = 0;
        xmlChar out[10];
        int hex = NXT(2);
        int value = xmlParseCharRef(ctxt);

        if (value == 0)
            return;
        if (ctxt->charset != XML_CHAR_ENCODING_UTF8) {
            /*
             * So we are using non-UTF-8 buffers
             * Check that the char fit on 8bits, if not
             * generate a CharRef.
             */
            if (value <= 0xFF) {
                out[0] = value;
                out[1] = 0;
                if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL) &&
                    (!ctxt->disableSAX))
                    ctxt->sax->characters(ctxt->userData, out, 1);
            } else {
                if ((hex == 'x') || (hex == 'X'))
                    snprintf((char *)out, sizeof(out), "#x%X", value);
                else
                    snprintf((char *)out, sizeof(out), "#%d", value);
                if ((ctxt->sax != NULL) && (ctxt->sax->reference != NULL) &&
                    (!ctxt->disableSAX))
                    ctxt->sax->reference(ctxt->userData, out);
            }
        } else {
            /*
             * Just encode the value in UTF-8
             */
            COPY_BUF(0 ,out, i, value);
            out[i] = 0;
            if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL) &&
                (!ctxt->disableSAX))
                ctxt->sax->characters(ctxt->userData, out, i);
        }
        return;
    }

    /*
     * We are seeing an entity reference
     */
    ent = xmlParseEntityRef(ctxt);
    if (ent == NULL) return;
    if (!ctxt->wellFormed)
        return;
    was_checked = ent->checked;

    /* special case of predefined entities */
    if ((ent->name == NULL) ||
        (ent->etype == XML_INTERNAL_PREDEFINED_ENTITY)) {
        val = ent->content;
        if (val == NULL) return;
        /*
         * inline the entity.
         */
        if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL) &&
            (!ctxt->disableSAX))
            ctxt->sax->characters(ctxt->userData, val, xmlStrlen(val));
        return;
    }

    /*
     * The first reference to the entity trigger a parsing phase
     * where the ent->children is filled with the result from
     * the parsing.
     */
    if (ent->checked == 0) {
        unsigned long oldnbent = ctxt->nbentities;

        /*
         * This is a bit hackish but this seems the best
         * way to make sure both SAX and DOM entity support
         * behaves okay.
         */
        void *user_data;
        if (ctxt->userData == ctxt)
            user_data = NULL;
        else
            user_data = ctxt->userData;

        /*
         * Check that this entity is well formed
         * 4.3.2: An internal general parsed entity is well-formed
         * if its replacement text matches the production labeled
         * content.
         */
        if (ent->etype == XML_INTERNAL_GENERAL_ENTITY) {
            ctxt->depth++;
            ret = xmlParseBalancedChunkMemoryInternal(ctxt, ent->content,
                                                      user_data, &list);
            ctxt->depth--;

        } else if (ent->etype == XML_EXTERNAL_GENERAL_PARSED_ENTITY) {
            ctxt->depth++;
            ret = xmlParseExternalEntityPrivate(ctxt->myDoc, ctxt, ctxt->sax,
                                           user_data, ctxt->depth, ent->URI,
                                           ent->ExternalID, &list);
            ctxt->depth--;
        } else {
            ret = XML_ERR_ENTITY_PE_INTERNAL;
            xmlErrMsgStr(ctxt, XML_ERR_INTERNAL_ERROR,
                         "invalid entity type found\n", NULL);
        }

        /*
         * Store the number of entities needing parsing for this entity
         * content and do checkings
         */
        ent->checked = ctxt->nbentities - oldnbent;
        if (ret == XML_ERR_ENTITY_LOOP) {
            xmlFatalErr(ctxt, XML_ERR_ENTITY_LOOP, NULL);
            xmlFreeNodeList(list);
            return;
        }
        if (xmlParserEntityCheck(ctxt, 0, ent)) {
            xmlFreeNodeList(list);
            return;
        }

        if ((ret == XML_ERR_OK) && (list != NULL)) {
            if (((ent->etype == XML_INTERNAL_GENERAL_ENTITY) ||
             (ent->etype == XML_EXTERNAL_GENERAL_PARSED_ENTITY))&&
                (ent->children == NULL)) {
                ent->children = list;
                if (ctxt->replaceEntities) {
                    /*
                     * Prune it directly in the generated document
                     * except for single text nodes.
                     */
                    if (((list->type == XML_TEXT_NODE) &&
                         (list->next == NULL)) ||
                        (ctxt->parseMode == XML_PARSE_READER)) {
                        list->parent = (xmlNodePtr) ent;
                        list = NULL;
                        ent->owner = 1;
                    } else {
                        ent->owner = 0;
                        while (list != NULL) {
                            list->parent = (xmlNodePtr) ctxt->node;
                            list->doc = ctxt->myDoc;
                            if (list->next == NULL)
                                ent->last = list;
                            list = list->next;
                        }
                        list = ent->children;
#ifdef LIBXML_LEGACY_ENABLED
                        if (ent->etype == XML_EXTERNAL_GENERAL_PARSED_ENTITY)
                          xmlAddEntityReference(ent, list, NULL);
#endif /* LIBXML_LEGACY_ENABLED */
                    }
                } else {
                    ent->owner = 1;
                    while (list != NULL) {
                        list->parent = (xmlNodePtr) ent;
                        if (list->next == NULL)
                            ent->last = list;
                        list = list->next;
                    }
                }
            } else {
                xmlFreeNodeList(list);
                list = NULL;
            }
        } else if ((ret != XML_ERR_OK) &&
                   (ret != XML_WAR_UNDECLARED_ENTITY)) {
            xmlFatalErrMsgStr(ctxt, XML_ERR_UNDECLARED_ENTITY,
                     "Entity '%s' failed to parse\n", ent->name);
        } else if (list != NULL) {
            xmlFreeNodeList(list);
            list = NULL;
        }
        if (ent->checked == 0)
            ent->checked = 1;
    } else if (ent->checked != 1) {
        ctxt->nbentities += ent->checked;
    }

    /*
     * Now that the entity content has been gathered
     * provide it to the application, this can take different forms based
     * on the parsing modes.
     */
    if (ent->children == NULL) {
        /*
         * Probably running in SAX mode and the callbacks don't
         * build the entity content. So unless we already went
         * though parsing for first checking go though the entity
         * content to generate callbacks associated to the entity
         */
        if (was_checked != 0) {
            void *user_data;
            /*
             * This is a bit hackish but this seems the best
             * way to make sure both SAX and DOM entity support
             * behaves okay.
             */
            if (ctxt->userData == ctxt)
                user_data = NULL;
            else
                user_data = ctxt->userData;

            if (ent->etype == XML_INTERNAL_GENERAL_ENTITY) {
                ctxt->depth++;
                ret = xmlParseBalancedChunkMemoryInternal(ctxt,
                                   ent->content, user_data, NULL);
                ctxt->depth--;
            } else if (ent->etype ==
                       XML_EXTERNAL_GENERAL_PARSED_ENTITY) {
                ctxt->depth++;
                ret = xmlParseExternalEntityPrivate(ctxt->myDoc, ctxt,
                           ctxt->sax, user_data, ctxt->depth,
                           ent->URI, ent->ExternalID, NULL);
                ctxt->depth--;
            } else {
                ret = XML_ERR_ENTITY_PE_INTERNAL;
                xmlErrMsgStr(ctxt, XML_ERR_INTERNAL_ERROR,
                             "invalid entity type found\n", NULL);
            }
            if (ret == XML_ERR_ENTITY_LOOP) {
                xmlFatalErr(ctxt, XML_ERR_ENTITY_LOOP, NULL);
                return;
            }
        }
        if ((ctxt->sax != NULL) && (ctxt->sax->reference != NULL) &&
            (ctxt->replaceEntities == 0) && (!ctxt->disableSAX)) {
            /*
             * Entity reference callback comes second, it's somewhat
             * superfluous but a compatibility to historical behaviour
             */
            ctxt->sax->reference(ctxt->userData, ent->name);
        }
        return;
    }

    /*
     * If we didn't get any children for the entity being built
     */
    if ((ctxt->sax != NULL) && (ctxt->sax->reference != NULL) &&
        (ctxt->replaceEntities == 0) && (!ctxt->disableSAX)) {
        /*
         * Create a node.
         */
        ctxt->sax->reference(ctxt->userData, ent->name);
        return;
    }

    if ((ctxt->replaceEntities) || (ent->children == NULL))  {
        /*
         * There is a problem on the handling of _private for entities
         * (bug 155816): Should we copy the content of the field from
         * the entity (possibly overwriting some value set by the user
         * when a copy is created), should we leave it alone, or should
         * we try to take care of different situations?  The problem
         * is exacerbated by the usage of this field by the xmlReader.
         * To fix this bug, we look at _private on the created node
         * and, if it's NULL, we copy in whatever was in the entity.
         * If it's not NULL we leave it alone.  This is somewhat of a
         * hack - maybe we should have further tests to determine
         * what to do.
         */
        if ((ctxt->node != NULL) && (ent->children != NULL)) {
            /*
             * Seems we are generating the DOM content, do
             * a simple tree copy for all references except the first
             * In the first occurrence list contains the replacement.
             * progressive == 2 means we are operating on the Reader
             * and since nodes are discarded we must copy all the time.
             */
            if (((list == NULL) && (ent->owner == 0)) ||
                (ctxt->parseMode == XML_PARSE_READER)) {
                xmlNodePtr nw = NULL, cur, firstChild = NULL;

                /*
                 * when operating on a reader, the entities definitions
                 * are always owning the entities subtree.
                if (ctxt->parseMode == XML_PARSE_READER)
                    ent->owner = 1;
                 */

                cur = ent->children;
                while (cur != NULL) {
                    nw = xmlDocCopyNode(cur, ctxt->myDoc, 1);
                    if (nw != NULL) {
                        if (nw->_private == NULL)
                            nw->_private = cur->_private;
                        if (firstChild == NULL){
                            firstChild = nw;
                        }
                        nw = xmlAddChild(ctxt->node, nw);
                    }
                    if (cur == ent->last) {
                        /*
                         * needed to detect some strange empty
                         * node cases in the reader tests
                         */
                        if ((ctxt->parseMode == XML_PARSE_READER) &&
                            (nw != NULL) &&
                            (nw->type == XML_ELEMENT_NODE) &&
                            (nw->children == NULL))
                            nw->extra = 1;

                        break;
                    }
                    cur = cur->next;
                }
#ifdef LIBXML_LEGACY_ENABLED
                if (ent->etype == XML_EXTERNAL_GENERAL_PARSED_ENTITY)
                  xmlAddEntityReference(ent, firstChild, nw);
#endif /* LIBXML_LEGACY_ENABLED */
            } else if (list == NULL) {
                xmlNodePtr nw = NULL, cur, next, last,
                           firstChild = NULL;
                /*
                 * Copy the entity child list and make it the new
                 * entity child list. The goal is to make sure any
                 * ID or REF referenced will be the one from the
                 * document content and not the entity copy.
                 */
                cur = ent->children;
                ent->children = NULL;
                last = ent->last;
                ent->last = NULL;
                while (cur != NULL) {
                    next = cur->next;
                    cur->next = NULL;
                    cur->parent = NULL;
                    nw = xmlDocCopyNode(cur, ctxt->myDoc, 1);
                    if (nw != NULL) {
                        if (nw->_private == NULL)
                            nw->_private = cur->_private;
                        if (firstChild == NULL){
                            firstChild = cur;
                        }
                        xmlAddChild((xmlNodePtr) ent, nw);
                        xmlAddChild(ctxt->node, cur);
                    }
                    if (cur == last)
                        break;
                    cur = next;
                }
                if (ent->owner == 0)
                    ent->owner = 1;
#ifdef LIBXML_LEGACY_ENABLED
                if (ent->etype == XML_EXTERNAL_GENERAL_PARSED_ENTITY)
                  xmlAddEntityReference(ent, firstChild, nw);
#endif /* LIBXML_LEGACY_ENABLED */
            } else {
                const xmlChar *nbktext;

                /*
                 * the name change is to avoid coalescing of the
                 * node with a possible previous text one which
                 * would make ent->children a dangling pointer
                 */
                nbktext = xmlDictLookup(ctxt->dict, BAD_CAST "nbktext",
                                        -1);
                if (ent->children->type == XML_TEXT_NODE)
                    ent->children->name = nbktext;
                if ((ent->last != ent->children) &&
                    (ent->last->type == XML_TEXT_NODE))
                    ent->last->name = nbktext;
                xmlAddChildList(ctxt->node, ent->children);
            }

            /*
             * This is to avoid a nasty side effect, see
             * characters() in SAX.c
             */
            ctxt->nodemem = 0;
            ctxt->nodelen = 0;
            return;
        }
    }
}

/**
 * xmlParseEntityRef:
 * @ctxt:  an XML parser context
 *
 * parse ENTITY references declarations
 *
 * [68] EntityRef ::= '&' Name ';'
 *
 * [ WFC: Entity Declared ]
 * In a document without any DTD, a document with only an internal DTD
 * subset which contains no parameter entity references, or a document
 * with "standalone='yes'", the Name given in the entity reference
 * must match that in an entity declaration, except that well-formed
 * documents need not declare any of the following entities: amp, lt,
 * gt, apos, quot.  The declaration of a parameter entity must precede
 * any reference to it.  Similarly, the declaration of a general entity
 * must precede any reference to it which appears in a default value in an
 * attribute-list declaration. Note that if entities are declared in the
 * external subset or in external parameter entities, a non-validating
 * processor is not obligated to read and process their declarations;
 * for such documents, the rule that an entity must be declared is a
 * well-formedness constraint only if standalone='yes'.
 *
 * [ WFC: Parsed Entity ]
 * An entity reference must not contain the name of an unparsed entity
 *
 * Returns the xmlEntityPtr if found, or NULL otherwise.
 */
xmlEntityPtr
xmlParseEntityRef(xmlParserCtxtPtr ctxt) {
    const xmlChar *name;
    xmlEntityPtr ent = NULL;

    GROW;
    if (ctxt->instate == XML_PARSER_EOF)
        return(NULL);

    if (RAW != '&')
        return(NULL);
    NEXT;
    name = xmlParseName(ctxt);
    if (name == NULL) {
        xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
                       "xmlParseEntityRef: no name\n");
        return(NULL);
    }
    if (RAW != ';') {
        xmlFatalErr(ctxt, XML_ERR_ENTITYREF_SEMICOL_MISSING, NULL);
        return(NULL);
    }
    NEXT;

    /*
     * Predefined entites override any extra definition
     */
    if ((ctxt->options & XML_PARSE_OLDSAX) == 0) {
        ent = xmlGetPredefinedEntity(name);
        if (ent != NULL)
            return(ent);
    }

    /*
     * Increate the number of entity references parsed
     */
    ctxt->nbentities++;

    /*
     * Ask first SAX for entity resolution, otherwise try the
     * entities which may have stored in the parser context.
     */
    if (ctxt->sax != NULL) {
        if (ctxt->sax->getEntity != NULL)
            ent = ctxt->sax->getEntity(ctxt->userData, name);
        if ((ctxt->wellFormed == 1 ) && (ent == NULL) && 
            (ctxt->options & XML_PARSE_OLDSAX))
            ent = xmlGetPredefinedEntity(name);
        if ((ctxt->wellFormed == 1 ) && (ent == NULL) &&
            (ctxt->userData==ctxt)) {
            ent = xmlSAX2GetEntity(ctxt, name);
        }
    }
    if (ctxt->instate == XML_PARSER_EOF)
        return(NULL);
    /*
     * [ WFC: Entity Declared ]
     * In a document without any DTD, a document with only an
     * internal DTD subset which contains no parameter entity
     * references, or a document with "standalone='yes'", the
     * Name given in the entity reference must match that in an
     * entity declaration, except that well-formed documents
     * need not declare any of the following entities: amp, lt,
     * gt, apos, quot.
     * The declaration of a parameter entity must precede any
     * reference to it.
     * Similarly, the declaration of a general entity must
     * precede any reference to it which appears in a default
     * value in an attribute-list declaration. Note that if
     * entities are declared in the external subset or in
     * external parameter entities, a non-validating processor
     * is not obligated to read and process their declarations;
     * for such documents, the rule that an entity must be
     * declared is a well-formedness constraint only if
     * standalone='yes'.
     */
    if (ent == NULL) {
        if ((ctxt->standalone == 1) ||
            ((ctxt->hasExternalSubset == 0) &&
             (ctxt->hasPErefs == 0))) {
            xmlFatalErrMsgStr(ctxt, XML_ERR_UNDECLARED_ENTITY,
                     "Entity '%s' not defined\n", name);
        } else {
            xmlErrMsgStr(ctxt, XML_WAR_UNDECLARED_ENTITY,
                     "Entity '%s' not defined\n", name);
            if ((ctxt->inSubset == 0) &&
                (ctxt->sax != NULL) &&
                (ctxt->sax->reference != NULL)) {
                ctxt->sax->reference(ctxt->userData, name);
            }
        }
        ctxt->valid = 0;
    }

    /*
     * [ WFC: Parsed Entity ]
     * An entity reference must not contain the name of an
     * unparsed entity
     */
    else if (ent->etype == XML_EXTERNAL_GENERAL_UNPARSED_ENTITY) {
        xmlFatalErrMsgStr(ctxt, XML_ERR_UNPARSED_ENTITY,
                 "Entity reference to unparsed entity %s\n", name);
    }

    /*
     * [ WFC: No External Entity References ]
     * Attribute values cannot contain direct or indirect
     * entity references to external entities.
     */
    else if ((ctxt->instate == XML_PARSER_ATTRIBUTE_VALUE) &&
             (ent->etype == XML_EXTERNAL_GENERAL_PARSED_ENTITY)) {
        xmlFatalErrMsgStr(ctxt, XML_ERR_ENTITY_IS_EXTERNAL,
             "Attribute references external entity '%s'\n", name);
    }
    /*
     * [ WFC: No < in Attribute Values ]
     * The replacement text of any entity referred to directly or
     * indirectly in an attribute value (other than "&lt;") must
     * not contain a <. 
     */
    else if ((ctxt->instate == XML_PARSER_ATTRIBUTE_VALUE) &&
             (ent != NULL) && (ent->content != NULL) &&
             (ent->etype != XML_INTERNAL_PREDEFINED_ENTITY) &&
             (xmlStrchr(ent->content, '<'))) {
        xmlFatalErrMsgStr(ctxt, XML_ERR_LT_IN_ATTRIBUTE,
    "'<' in entity '%s' is not allowed in attributes values\n", name);
    }

    /*
     * Internal check, no parameter entities here ...
     */
    else {
        switch (ent->etype) {
            case XML_INTERNAL_PARAMETER_ENTITY:
            case XML_EXTERNAL_PARAMETER_ENTITY:
            xmlFatalErrMsgStr(ctxt, XML_ERR_ENTITY_IS_PARAMETER,
             "Attempt to reference the parameter entity '%s'\n",
                              name);
            break;
            default:
            break;
        }
    }

    /*
     * [ WFC: No Recursion ]
     * A parsed entity must not contain a recursive reference
     * to itself, either directly or indirectly. 
     * Done somewhere else
     */
    return(ent);
}

/**
 * xmlParseStringEntityRef:
 * @ctxt:  an XML parser context
 * @str:  a pointer to an index in the string
 *
 * parse ENTITY references declarations, but this version parses it from
 * a string value.
 *
 * [68] EntityRef ::= '&' Name ';'
 *
 * [ WFC: Entity Declared ]
 * In a document without any DTD, a document with only an internal DTD
 * subset which contains no parameter entity references, or a document
 * with "standalone='yes'", the Name given in the entity reference
 * must match that in an entity declaration, except that well-formed
 * documents need not declare any of the following entities: amp, lt,
 * gt, apos, quot.  The declaration of a parameter entity must precede
 * any reference to it.  Similarly, the declaration of a general entity
 * must precede any reference to it which appears in a default value in an
 * attribute-list declaration. Note that if entities are declared in the
 * external subset or in external parameter entities, a non-validating
 * processor is not obligated to read and process their declarations;
 * for such documents, the rule that an entity must be declared is a
 * well-formedness constraint only if standalone='yes'.
 *
 * [ WFC: Parsed Entity ]
 * An entity reference must not contain the name of an unparsed entity
 *
 * Returns the xmlEntityPtr if found, or NULL otherwise. The str pointer
 * is updated to the current location in the string.
 */
static xmlEntityPtr
xmlParseStringEntityRef(xmlParserCtxtPtr ctxt, const xmlChar ** str) {
    xmlChar *name;
    const xmlChar *ptr;
    xmlChar cur;
    xmlEntityPtr ent = NULL;

    if ((str == NULL) || (*str == NULL))
        return(NULL);
    ptr = *str;
    cur = *ptr;
    if (cur != '&')
        return(NULL);

    ptr++;
    name = xmlParseStringName(ctxt, &ptr);
    if (name == NULL) {
        xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
                       "xmlParseStringEntityRef: no name\n");
        *str = ptr;
        return(NULL);
    }
    if (*ptr != ';') {
        xmlFatalErr(ctxt, XML_ERR_ENTITYREF_SEMICOL_MISSING, NULL);
        xmlFree(name);
        *str = ptr;
        return(NULL);
    }
    ptr++;


    /*
     * Predefined entites override any extra definition
     */
    if ((ctxt->options & XML_PARSE_OLDSAX) == 0) {
        ent = xmlGetPredefinedEntity(name);
        if (ent != NULL) {
            xmlFree(name);
            *str = ptr;
            return(ent);
        }
    }

    /*
     * Increate the number of entity references parsed
     */
    ctxt->nbentities++;

    /*
     * Ask first SAX for entity resolution, otherwise try the
     * entities which may have stored in the parser context.
     */
    if (ctxt->sax != NULL) {
        if (ctxt->sax->getEntity != NULL)
            ent = ctxt->sax->getEntity(ctxt->userData, name);
        if ((ent == NULL) && (ctxt->options & XML_PARSE_OLDSAX))
            ent = xmlGetPredefinedEntity(name);
        if ((ent == NULL) && (ctxt->userData==ctxt)) {
            ent = xmlSAX2GetEntity(ctxt, name);
        }
    }
    if (ctxt->instate == XML_PARSER_EOF) {
        xmlFree(name);
        return(NULL);
    }

    /*
     * [ WFC: Entity Declared ]
     * In a document without any DTD, a document with only an
     * internal DTD subset which contains no parameter entity
     * references, or a document with "standalone='yes'", the
     * Name given in the entity reference must match that in an
     * entity declaration, except that well-formed documents
     * need not declare any of the following entities: amp, lt,
     * gt, apos, quot.
     * The declaration of a parameter entity must precede any
     * reference to it.
     * Similarly, the declaration of a general entity must
     * precede any reference to it which appears in a default
     * value in an attribute-list declaration. Note that if
     * entities are declared in the external subset or in
     * external parameter entities, a non-validating processor
     * is not obligated to read and process their declarations;
     * for such documents, the rule that an entity must be
     * declared is a well-formedness constraint only if
     * standalone='yes'. 
     */
    if (ent == NULL) {
        if ((ctxt->standalone == 1) ||
            ((ctxt->hasExternalSubset == 0) &&
             (ctxt->hasPErefs == 0))) {
            xmlFatalErrMsgStr(ctxt, XML_ERR_UNDECLARED_ENTITY,
                     "Entity '%s' not defined\n", name);
        } else {
            xmlErrMsgStr(ctxt, XML_WAR_UNDECLARED_ENTITY,
                          "Entity '%s' not defined\n",
                          name);
        }
        /* TODO ? check regressions ctxt->valid = 0; */
    }

    /*
     * [ WFC: Parsed Entity ]
     * An entity reference must not contain the name of an
     * unparsed entity
     */
    else if (ent->etype == XML_EXTERNAL_GENERAL_UNPARSED_ENTITY) {
        xmlFatalErrMsgStr(ctxt, XML_ERR_UNPARSED_ENTITY,
                 "Entity reference to unparsed entity %s\n", name);
    }

    /*
     * [ WFC: No External Entity References ]
     * Attribute values cannot contain direct or indirect
     * entity references to external entities.
     */
    else if ((ctxt->instate == XML_PARSER_ATTRIBUTE_VALUE) &&
             (ent->etype == XML_EXTERNAL_GENERAL_PARSED_ENTITY)) {
        xmlFatalErrMsgStr(ctxt, XML_ERR_ENTITY_IS_EXTERNAL,
         "Attribute references external entity '%s'\n", name);
    }
    /*
     * [ WFC: No < in Attribute Values ]
     * The replacement text of any entity referred to directly or
     * indirectly in an attribute value (other than "&lt;") must
     * not contain a <.
     */
    else if ((ctxt->instate == XML_PARSER_ATTRIBUTE_VALUE) &&
             (ent != NULL) && (ent->content != NULL) &&
             (ent->etype != XML_INTERNAL_PREDEFINED_ENTITY) &&
             (xmlStrchr(ent->content, '<'))) {
        xmlFatalErrMsgStr(ctxt, XML_ERR_LT_IN_ATTRIBUTE,
     "'<' in entity '%s' is not allowed in attributes values\n",
                          name);
    }

    /*
     * Internal check, no parameter entities here ...
     */
    else {
        switch (ent->etype) {
            case XML_INTERNAL_PARAMETER_ENTITY:
            case XML_EXTERNAL_PARAMETER_ENTITY:
                xmlFatalErrMsgStr(ctxt, XML_ERR_ENTITY_IS_PARAMETER,
             "Attempt to reference the parameter entity '%s'\n",
                                  name);
            break;
            default:
            break;
        }
    }

    /*
     * [ WFC: No Recursion ]
     * A parsed entity must not contain a recursive reference
     * to itself, either directly or indirectly.
     * Done somewhere else
     */

    xmlFree(name);
    *str = ptr;
    return(ent);
}

/**
 * xmlParsePEReference:
 * @ctxt:  an XML parser context
 *
 * parse PEReference declarations
 * The entity content is handled directly by pushing it's content as
 * a new input stream.
 *
 * [69] PEReference ::= '%' Name ';'
 *
 * [ WFC: No Recursion ]
 * A parsed entity must not contain a recursive
 * reference to itself, either directly or indirectly. 
 *
 * [ WFC: Entity Declared ]
 * In a document without any DTD, a document with only an internal DTD
 * subset which contains no parameter entity references, or a document
 * with "standalone='yes'", ...  ... The declaration of a parameter
 * entity must precede any reference to it...
 *
 * [ VC: Entity Declared ]
 * In a document with an external subset or external parameter entities
 * with "standalone='no'", ...  ... The declaration of a parameter entity
 * must precede any reference to it...
 *
 * [ WFC: In DTD ]
 * Parameter-entity references may only appear in the DTD.
 * NOTE: misleading but this is handled.
 */
void
xmlParsePEReference(xmlParserCtxtPtr ctxt)
{
    const xmlChar *name;
    xmlEntityPtr entity = NULL;
    xmlParserInputPtr input;

    if (RAW != '%')
        return;
    NEXT;
    name = xmlParseName(ctxt);
    if (name == NULL) {
        xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
                       "xmlParsePEReference: no name\n");
        return;
    }
    if (RAW != ';') {
        xmlFatalErr(ctxt, XML_ERR_ENTITYREF_SEMICOL_MISSING, NULL);
        return;
    }

    NEXT;

    /*
     * Increate the number of entity references parsed
     */
    ctxt->nbentities++;

    /*
     * Request the entity from SAX
     */
    if ((ctxt->sax != NULL) &&
        (ctxt->sax->getParameterEntity != NULL))
        entity = ctxt->sax->getParameterEntity(ctxt->userData, name);
    if (ctxt->instate == XML_PARSER_EOF)
        return;
    if (entity == NULL) {
        /*
         * [ WFC: Entity Declared ]
         * In a document without any DTD, a document with only an
         * internal DTD subset which contains no parameter entity
         * references, or a document with "standalone='yes'", ...
         * ... The declaration of a parameter entity must precede
         * any reference to it...
         */
        if ((ctxt->standalone == 1) ||
            ((ctxt->hasExternalSubset == 0) &&
             (ctxt->hasPErefs == 0))) {
            xmlFatalErrMsgStr(ctxt, XML_ERR_UNDECLARED_ENTITY,
                              "PEReference: %%%s; not found\n",
                              name);
        } else {
            /*
             * [ VC: Entity Declared ]
             * In a document with an external subset or external
             * parameter entities with "standalone='no'", ...
             * ... The declaration of a parameter entity must
             * precede any reference to it...
             */
            xmlWarningMsg(ctxt, XML_WAR_UNDECLARED_ENTITY,
                          "PEReference: %%%s; not found\n",
                          name, NULL);
            ctxt->valid = 0;
        }
    } else {
        /*
         * Internal checking in case the entity quest barfed
         */
        if ((entity->etype != XML_INTERNAL_PARAMETER_ENTITY) &&
            (entity->etype != XML_EXTERNAL_PARAMETER_ENTITY)) {
            xmlWarningMsg(ctxt, XML_WAR_UNDECLARED_ENTITY,
                  "Internal: %%%s; is not a parameter entity\n",
                          name, NULL);
        } else if (ctxt->input->free != deallocblankswrapper) {
            input = xmlNewBlanksWrapperInputStream(ctxt, entity);
            if (xmlPushInput(ctxt, input) < 0)
                return;
        } else {
            /*
             * TODO !!!
             * handle the extra spaces added before and after
             * c.f. http://www.w3.org/TR/REC-xml#as-PE
             */
            input = xmlNewEntityInputStream(ctxt, entity);
            if (xmlPushInput(ctxt, input) < 0)
                return;
            if ((entity->etype == XML_EXTERNAL_PARAMETER_ENTITY) &&
                (CMP5(CUR_PTR, '<', '?', 'x', 'm', 'l')) &&
                (IS_BLANK_CH(NXT(5)))) {
                xmlParseTextDecl(ctxt);
                if (ctxt->errNo ==
                    XML_ERR_UNSUPPORTED_ENCODING) {
                    /*
                     * The XML REC instructs us to stop parsing
                     * right here
                     */
                    ctxt->instate = XML_PARSER_EOF;
                    return;
                }
            }
        }
    }
    ctxt->hasPErefs = 1;
}

/**
 * xmlLoadEntityContent:
 * @ctxt:  an XML parser context
 * @entity: an unloaded system entity
 *
 * Load the original content of the given system entity from the
 * ExternalID/SystemID given. This is to be used for Included in Literal
 * http://www.w3.org/TR/REC-xml/#inliteral processing of entities references
 *
 * Returns 0 in case of success and -1 in case of failure
 */
static int
xmlLoadEntityContent(xmlParserCtxtPtr ctxt, xmlEntityPtr entity) {
    xmlParserInputPtr input;
    xmlBufferPtr buf;
    int l, c;
    int count = 0;

    if ((ctxt == NULL) || (entity == NULL) ||
        ((entity->etype != XML_EXTERNAL_PARAMETER_ENTITY) &&
         (entity->etype != XML_EXTERNAL_GENERAL_PARSED_ENTITY)) ||
        (entity->content != NULL)) {
        xmlFatalErr(ctxt, XML_ERR_INTERNAL_ERROR,
                    "xmlLoadEntityContent parameter error");
        return(-1);
    }

    if (xmlParserDebugEntities)
        xmlGenericError(xmlGenericErrorContext,
                "Reading %s entity content input\n", entity->name);

    buf = xmlBufferCreate();
    if (buf == NULL) {
        xmlFatalErr(ctxt, XML_ERR_INTERNAL_ERROR,
                    "xmlLoadEntityContent parameter error");
        return(-1);
    }

    input = xmlNewEntityInputStream(ctxt, entity);
    if (input == NULL) {
        xmlFatalErr(ctxt, XML_ERR_INTERNAL_ERROR,
                    "xmlLoadEntityContent input error");
        xmlBufferFree(buf);
        return(-1);
    }

    /*
     * Push the entity as the current input, read char by char
     * saving to the buffer until the end of the entity or an error
     */
    if (xmlPushInput(ctxt, input) < 0) {
        xmlBufferFree(buf);
        return(-1);
    }

    GROW;
    c = CUR_CHAR(l);
    while ((ctxt->input == input) && (ctxt->input->cur < ctxt->input->end) &&
           (IS_CHAR(c))) {
        xmlBufferAdd(buf, ctxt->input->cur, l);
        if (count++ > 100) {
            count = 0;
            GROW;
            if (ctxt->instate == XML_PARSER_EOF) {
                xmlBufferFree(buf);
                return(-1);
            }
        }
        NEXTL(l);
        c = CUR_CHAR(l);
    }

    if ((ctxt->input == input) && (ctxt->input->cur >= ctxt->input->end)) {
        xmlPopInput(ctxt);
    } else if (!IS_CHAR(c)) {
        xmlFatalErrMsgInt(ctxt, XML_ERR_INVALID_CHAR,
                          "xmlLoadEntityContent: invalid char value %d\n",
                          c);
        xmlBufferFree(buf);
        return(-1);
    }
    entity->content = buf->content;
    buf->content = NULL;
    xmlBufferFree(buf);

    return(0);
}

/**
 * xmlParseStringPEReference:
 * @ctxt:  an XML parser context
 * @str:  a pointer to an index in the string
 *
 * parse PEReference declarations
 *
 * [69] PEReference ::= '%' Name ';'
 *
 * [ WFC: No Recursion ]
 * A parsed entity must not contain a recursive
 * reference to itself, either directly or indirectly.
 *
 * [ WFC: Entity Declared ]
 * In a document without any DTD, a document with only an internal DTD
 * subset which contains no parameter entity references, or a document
 * with "standalone='yes'", ...  ... The declaration of a parameter
 * entity must precede any reference to it...
 *
 * [ VC: Entity Declared ]
 * In a document with an external subset or external parameter entities
 * with "standalone='no'", ...  ... The declaration of a parameter entity
 * must precede any reference to it...
 *
 * [ WFC: In DTD ]
 * Parameter-entity references may only appear in the DTD.
 * NOTE: misleading but this is handled.
 *
 * Returns the string of the entity content.
 *         str is updated to the current value of the index
 */
static xmlEntityPtr
xmlParseStringPEReference(xmlParserCtxtPtr ctxt, const xmlChar **str) {
    const xmlChar *ptr;
    xmlChar cur;
    xmlChar *name;
    xmlEntityPtr entity = NULL;

    if ((str == NULL) || (*str == NULL)) return(NULL);
    ptr = *str;
    cur = *ptr;
    if (cur != '%')
        return(NULL);
    ptr++;
    name = xmlParseStringName(ctxt, &ptr);
    if (name == NULL) {
        xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
                       "xmlParseStringPEReference: no name\n");
        *str = ptr;
        return(NULL);
    }
    cur = *ptr;
    if (cur != ';') {
        xmlFatalErr(ctxt, XML_ERR_ENTITYREF_SEMICOL_MISSING, NULL);
        xmlFree(name);
        *str = ptr;
        return(NULL);
    }
    ptr++;

    /*
     * Increate the number of entity references parsed
     */
    ctxt->nbentities++;

    /*
     * Request the entity from SAX
     */
    if ((ctxt->sax != NULL) &&
        (ctxt->sax->getParameterEntity != NULL))
        entity = ctxt->sax->getParameterEntity(ctxt->userData, name);
    if (ctxt->instate == XML_PARSER_EOF) {
        xmlFree(name);
        return(NULL);
    }
    if (entity == NULL) {
        /*
         * [ WFC: Entity Declared ]
         * In a document without any DTD, a document with only an
         * internal DTD subset which contains no parameter entity
         * references, or a document with "standalone='yes'", ...
         * ... The declaration of a parameter entity must precede
         * any reference to it...
         */
        if ((ctxt->standalone == 1) ||
            ((ctxt->hasExternalSubset == 0) && (ctxt->hasPErefs == 0))) {
            xmlFatalErrMsgStr(ctxt, XML_ERR_UNDECLARED_ENTITY,
                 "PEReference: %%%s; not found\n", name);
        } else {
            /*
             * [ VC: Entity Declared ]
             * In a document with an external subset or external
             * parameter entities with "standalone='no'", ...
             * ... The declaration of a parameter entity must
             * precede any reference to it...
             */
            xmlWarningMsg(ctxt, XML_WAR_UNDECLARED_ENTITY,
                          "PEReference: %%%s; not found\n",
                          name, NULL);
            ctxt->valid = 0;
        }
    } else {
        /*
         * Internal checking in case the entity quest barfed
         */
        if ((entity->etype != XML_INTERNAL_PARAMETER_ENTITY) &&
            (entity->etype != XML_EXTERNAL_PARAMETER_ENTITY)) {
            xmlWarningMsg(ctxt, XML_WAR_UNDECLARED_ENTITY,
                          "%%%s; is not a parameter entity\n",
                          name, NULL);
        }
    }
    ctxt->hasPErefs = 1;
    xmlFree(name);
    *str = ptr;
    return(entity);
}

/**
 * xmlParseDocTypeDecl:
 * @ctxt:  an XML parser context
 *
 * parse a DOCTYPE declaration
 *
 * [28] doctypedecl ::= '<!DOCTYPE' S Name (S ExternalID)? S? 
 *                      ('[' (markupdecl | PEReference | S)* ']' S?)? '>'
 *
 * [ VC: Root Element Type ]
 * The Name in the document type declaration must match the element
 * type of the root element. 
 */

void
xmlParseDocTypeDecl(xmlParserCtxtPtr ctxt) {
    const xmlChar *name = NULL;
    xmlChar *ExternalID = NULL;
    xmlChar *URI = NULL;

    /*
     * We know that '<!DOCTYPE' has been detected.
     */
    SKIP(9);

    SKIP_BLANKS;

    /*
     * Parse the DOCTYPE name.
     */
    name = xmlParseName(ctxt);
    if (name == NULL) {
        xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
                       "xmlParseDocTypeDecl : no DOCTYPE name !\n");
    }
    ctxt->intSubName = name;

    SKIP_BLANKS;

    /*
     * Check for SystemID and ExternalID
     */
    URI = xmlParseExternalID(ctxt, &ExternalID, 1);

    if ((URI != NULL) || (ExternalID != NULL)) {
        ctxt->hasExternalSubset = 1;
    }
    ctxt->extSubURI = URI;
    ctxt->extSubSystem = ExternalID;

    SKIP_BLANKS;

    /*
     * Create and update the internal subset.
     */
    if ((ctxt->sax != NULL) && (ctxt->sax->internalSubset != NULL) &&
        (!ctxt->disableSAX))
        ctxt->sax->internalSubset(ctxt->userData, name, ExternalID, URI);
    if (ctxt->instate == XML_PARSER_EOF)
        return;

    /*
     * Is there any internal subset declarations ?
     * they are handled separately in xmlParseInternalSubset()
     */
    if (RAW == '[')
        return;

    /*
     * We should be at the end of the DOCTYPE declaration.
     */
    if (RAW != '>') {
        xmlFatalErr(ctxt, XML_ERR_DOCTYPE_NOT_FINISHED, NULL);
    }
    NEXT;
}

/**
 * xmlParseInternalSubset:
 * @ctxt:  an XML parser context
 *
 * parse the internal subset declaration
 *
 * [28 end] ('[' (markupdecl | PEReference | S)* ']' S?)? '>'
 */

static void
xmlParseInternalSubset(xmlParserCtxtPtr ctxt) {
    /*
     * Is there any DTD definition ?
     */
    if (RAW == '[') {
        ctxt->instate = XML_PARSER_DTD;
        NEXT;
        /*
         * Parse the succession of Markup declarations and 
         * PEReferences.
         * Subsequence (markupdecl | PEReference | S)*
         */
        while ((RAW != ']') && (ctxt->instate != XML_PARSER_EOF)) {
            const xmlChar *check = CUR_PTR;
            unsigned int cons = ctxt->input->consumed;

            SKIP_BLANKS;
            xmlParseMarkupDecl(ctxt);
            xmlParsePEReference(ctxt);

            /*
             * Pop-up of finished entities.
             */
            while ((RAW == 0) && (ctxt->inputNr > 1))
                xmlPopInput(ctxt);

            if ((CUR_PTR == check) && (cons == ctxt->input->consumed)) {
                xmlFatalErr(ctxt, XML_ERR_INTERNAL_ERROR,
             "xmlParseInternalSubset: error detected in Markup declaration\n");
                break;
            }
        }
        if (RAW == ']') { 
            NEXT;
            SKIP_BLANKS;
        }
    }

    /*
     * We should be at the end of the DOCTYPE declaration.
     */
    if (RAW != '>') {
        xmlFatalErr(ctxt, XML_ERR_DOCTYPE_NOT_FINISHED, NULL);
    }
    NEXT;
}

#ifdef LIBXML_SAX1_ENABLED
/**
 * xmlParseAttribute:
 * @ctxt:  an XML parser context
 * @value:  a xmlChar ** used to store the value of the attribute
 *
 * parse an attribute
 *
 * [41] Attribute ::= Name Eq AttValue
 *
 * [ WFC: No External Entity References ]
 * Attribute values cannot contain direct or indirect entity references
 * to external entities.
 *
 * [ WFC: No < in Attribute Values ]
 * The replacement text of any entity referred to directly or indirectly in
 * an attribute value (other than "&lt;") must not contain a <. 
 * 
 * [ VC: Attribute Value Type ]
 * The attribute must have been declared; the value must be of the type
 * declared for it.
 *
 * [25] Eq ::= S? '=' S?
 *
 * With namespace:
 *
 * [NS 11] Attribute ::= QName Eq AttValue
 *
 * Also the case QName == xmlns:??? is handled independently as a namespace
 * definition.
 *
 * Returns the attribute name, and the value in *value.
 */

const xmlChar *
xmlParseAttribute(xmlParserCtxtPtr ctxt, xmlChar **value) {
    const xmlChar *name;
    xmlChar *val;

    *value = NULL;
    GROW;
    name = xmlParseName(ctxt);
    if (name == NULL) {
        xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
                       "error parsing attribute name\n");
        return(NULL);
    }

    /*
     * read the value
     */
    SKIP_BLANKS;
    if (RAW == '=') {
        NEXT;
        SKIP_BLANKS;
        val = xmlParseAttValue(ctxt);
        ctxt->instate = XML_PARSER_CONTENT;
    } else {
        xmlFatalErrMsgStr(ctxt, XML_ERR_ATTRIBUTE_WITHOUT_VALUE,
               "Specification mandate value for attribute %s\n", name);
        return(NULL);
    }

    /*
     * Check that xml:lang conforms to the specification
     * No more registered as an error, just generate a warning now
     * since this was deprecated in XML second edition
     */
    if ((ctxt->pedantic) && (xmlStrEqual(name, BAD_CAST "xml:lang"))) {
        if (!xmlCheckLanguageID(val)) {
            xmlWarningMsg(ctxt, XML_WAR_LANG_VALUE,
                          "Malformed value for xml:lang : %s\n",
                          val, NULL);
        }
    }

    /*
     * Check that xml:space conforms to the specification
     */
    if (xmlStrEqual(name, BAD_CAST "xml:space")) {
        if (xmlStrEqual(val, BAD_CAST "default"))
            *(ctxt->space) = 0;
        else if (xmlStrEqual(val, BAD_CAST "preserve"))
            *(ctxt->space) = 1;
        else {
                xmlWarningMsg(ctxt, XML_WAR_SPACE_VALUE,
"Invalid value \"%s\" for xml:space : \"default\" or \"preserve\" expected\n",
                                 val, NULL);
        }
    }

    *value = val;
    return(name);
}

/**
 * xmlParseStartTag:
 * @ctxt:  an XML parser context
 * 
 * parse a start of tag either for rule element or
 * EmptyElement. In both case we don't parse the tag closing chars.
 *
 * [40] STag ::= '<' Name (S Attribute)* S? '>'
 *
 * [ WFC: Unique Att Spec ]
 * No attribute name may appear more than once in the same start-tag or
 * empty-element tag. 
 *
 * [44] EmptyElemTag ::= '<' Name (S Attribute)* S? '/>'
 *
 * [ WFC: Unique Att Spec ]
 * No attribute name may appear more than once in the same start-tag or
 * empty-element tag. 
 *
 * With namespace:
 *
 * [NS 8] STag ::= '<' QName (S Attribute)* S? '>'
 *
 * [NS 10] EmptyElement ::= '<' QName (S Attribute)* S? '/>'
 *
 * Returns the element name parsed
 */

const xmlChar *
xmlParseStartTag(xmlParserCtxtPtr ctxt) {
    const xmlChar *name;
    const xmlChar *attname;
    xmlChar *attvalue;
    const xmlChar **atts = ctxt->atts;
    int nbatts = 0;
    int maxatts = ctxt->maxatts;
    int i;

    if (RAW != '<') return(NULL);
    NEXT1;

    name = xmlParseName(ctxt);
    if (name == NULL) {
        xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
             "xmlParseStartTag: invalid element name\n");
        return(NULL);
    }

    /*
     * Now parse the attributes, it ends up with the ending
     *
     * (S Attribute)* S?
     */
    SKIP_BLANKS;
    GROW;

    while (((RAW != '>') && 
           ((RAW != '/') || (NXT(1) != '>')) &&
           (IS_BYTE_CHAR(RAW))) && (ctxt->instate != XML_PARSER_EOF)) {
        const xmlChar *q = CUR_PTR;
        unsigned int cons = ctxt->input->consumed;

        attname = xmlParseAttribute(ctxt, &attvalue);
        if ((attname != NULL) && (attvalue != NULL)) {
            /*
             * [ WFC: Unique Att Spec ]
             * No attribute name may appear more than once in the same
             * start-tag or empty-element tag. 
             */
            for (i = 0; i < nbatts;i += 2) {
                if (xmlStrEqual(atts[i], attname)) {
                    xmlErrAttributeDup(ctxt, NULL, attname);
                    xmlFree(attvalue);
                    goto failed;
                }
            }
            /*
             * Add the pair to atts
             */
            if (atts == NULL) {
                maxatts = 22; /* allow for 10 attrs by default */
                atts = (const xmlChar **)
                       xmlMalloc(maxatts * sizeof(xmlChar *));
                if (atts == NULL) {
                    xmlErrMemory(ctxt, NULL);
                    if (attvalue != NULL)
                        xmlFree(attvalue);
                    goto failed;
                }
                ctxt->atts = atts;
                ctxt->maxatts = maxatts;
            } else if (nbatts + 4 > maxatts) {
                const xmlChar **n;

                maxatts *= 2;
                n = (const xmlChar **) xmlRealloc((void *) atts,
                                             maxatts * sizeof(const xmlChar *));
                if (n == NULL) {
                    xmlErrMemory(ctxt, NULL);
                    if (attvalue != NULL)
                        xmlFree(attvalue);
                    goto failed;
                }
                atts = n;
                ctxt->atts = atts;
                ctxt->maxatts = maxatts;
            }
            atts[nbatts++] = attname;
            atts[nbatts++] = attvalue;
            atts[nbatts] = NULL;
            atts[nbatts + 1] = NULL;
        } else {
            if (attvalue != NULL)
                xmlFree(attvalue);
        }

failed:     

        GROW
        if ((RAW == '>') || (((RAW == '/') && (NXT(1) == '>'))))
            break;
        if (!IS_BLANK_CH(RAW)) {
            xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                           "attributes construct error\n");
        }
        SKIP_BLANKS;
        if ((cons == ctxt->input->consumed) && (q == CUR_PTR) &&
            (attname == NULL) && (attvalue == NULL)) {
            xmlFatalErrMsg(ctxt, XML_ERR_INTERNAL_ERROR,
                           "xmlParseStartTag: problem parsing attributes\n");
            break;
        }
        SHRINK;
        GROW;
    }

    /*
     * SAX: Start of Element !
     */
    if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL) &&
        (!ctxt->disableSAX)) {
        if (nbatts > 0)
            ctxt->sax->startElement(ctxt->userData, name, atts);
        else
            ctxt->sax->startElement(ctxt->userData, name, NULL);
    }

    if (atts != NULL) {
        /* Free only the content strings */
        for (i = 1;i < nbatts;i+=2)
            if (atts[i] != NULL)
               xmlFree((xmlChar *) atts[i]);
    }
    return(name);
}

/**
 * xmlParseEndTag1:
 * @ctxt:  an XML parser context
 * @line:  line of the start tag
 * @nsNr:  number of namespaces on the start tag
 *
 * parse an end of tag
 *
 * [42] ETag ::= '</' Name S? '>'
 *
 * With namespace
 *
 * [NS 9] ETag ::= '</' QName S? '>'
 */

static void
xmlParseEndTag1(xmlParserCtxtPtr ctxt, int line) {
    const xmlChar *name;

    GROW;
    if ((RAW != '<') || (NXT(1) != '/')) {
        xmlFatalErrMsg(ctxt, XML_ERR_LTSLASH_REQUIRED,
                       "xmlParseEndTag: '</' not found\n");
        return;
    }
    SKIP(2);

    name = xmlParseNameAndCompare(ctxt,ctxt->name);

    /*
     * We should definitely be at the ending "S? '>'" part
     */
    GROW;
    SKIP_BLANKS;
    if ((!IS_BYTE_CHAR(RAW)) || (RAW != '>')) {
        xmlFatalErr(ctxt, XML_ERR_GT_REQUIRED, NULL);
    } else
        NEXT1;

    /*
     * [ WFC: Element Type Match ]
     * The Name in an element's end-tag must match the element type in the
     * start-tag. 
     *
     */
    if (name != (xmlChar*)1) {
        if (name == NULL) name = BAD_CAST "unparseable";
        xmlFatalErrMsgStrIntStr(ctxt, XML_ERR_TAG_NAME_MISMATCH,
                     "Opening and ending tag mismatch: %s line %d and %s\n",
                                ctxt->name, line, name);
    }

    /*
     * SAX: End of Tag
     */
    if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL) &&
        (!ctxt->disableSAX))
        ctxt->sax->endElement(ctxt->userData, ctxt->name);

    namePop(ctxt);
    spacePop(ctxt);
    return;
}

/**
 * xmlParseEndTag:
 * @ctxt:  an XML parser context
 *
 * parse an end of tag
 *
 * [42] ETag ::= '</' Name S? '>'
 *
 * With namespace
 *
 * [NS 9] ETag ::= '</' QName S? '>'
 */

void
xmlParseEndTag(xmlParserCtxtPtr ctxt) {
    xmlParseEndTag1(ctxt, 0);
}
#endif /* LIBXML_SAX1_ENABLED */

/************************************************************************
 *                                                                      *
 *                    SAX 2 specific operations                         *
 *                                                                      *
 ************************************************************************/

/*
 * xmlGetNamespace:
 * @ctxt:  an XML parser context
 * @prefix:  the prefix to lookup
 *
 * Lookup the namespace name for the @prefix (which ca be NULL)
 * The prefix must come from the @ctxt->dict dictionnary
 *
 * Returns the namespace name or NULL if not bound
 */
static const xmlChar *
xmlGetNamespace(xmlParserCtxtPtr ctxt, const xmlChar *prefix) {
    int i;

    if (prefix == ctxt->str_xml) return(ctxt->str_xml_ns);
    for (i = ctxt->nsNr - 2;i >= 0;i-=2)
        if (ctxt->nsTab[i] == prefix) {
            if ((prefix == NULL) && (*ctxt->nsTab[i + 1] == 0))
                return(NULL);
            return(ctxt->nsTab[i + 1]);
        }
    return(NULL);
}

/**
 * xmlParseQName:
 * @ctxt:  an XML parser context
 * @prefix:  pointer to store the prefix part
 *
 * parse an XML Namespace QName
 *
 * [6]  QName  ::= (Prefix ':')? LocalPart
 * [7]  Prefix  ::= NCName
 * [8]  LocalPart  ::= NCName
 *
 * Returns the Name parsed or NULL
 */

static const xmlChar *
xmlParseQName(xmlParserCtxtPtr ctxt, const xmlChar **prefix) {
    const xmlChar *l, *p;

    GROW;

    l = xmlParseNCName(ctxt);
    if (l == NULL) {
        if (CUR == ':') {
            l = xmlParseName(ctxt);
            if (l != NULL) {
                xmlNsErr(ctxt, XML_NS_ERR_QNAME, 
                         "Failed to parse QName '%s'\n", l, NULL, NULL);
                *prefix = NULL;
                return(l);
            }
        }
        return(NULL);
    }
    if (CUR == ':') {
        NEXT;
        p = l;
        l = xmlParseNCName(ctxt);
        if (l == NULL) {
            xmlChar *tmp;

            xmlNsErr(ctxt, XML_NS_ERR_QNAME,
                     "Failed to parse QName '%s:'\n", p, NULL, NULL);
            l = xmlParseNmtoken(ctxt);
            if (l == NULL)
                tmp = xmlBuildQName(BAD_CAST "", p, NULL, 0);
            else {
                tmp = xmlBuildQName(l, p, NULL, 0);
                xmlFree((char *)l);
            }
            p = xmlDictLookup(ctxt->dict, tmp, -1);
            if (tmp != NULL) xmlFree(tmp);
            *prefix = NULL;
            return(p);
        }
        if (CUR == ':') {
            xmlChar *tmp;

            xmlNsErr(ctxt, XML_NS_ERR_QNAME,
                     "Failed to parse QName '%s:%s:'\n", p, l, NULL);
            NEXT;
            tmp = (xmlChar *) xmlParseName(ctxt);
            if (tmp != NULL) {
                tmp = xmlBuildQName(tmp, l, NULL, 0);
                l = xmlDictLookup(ctxt->dict, tmp, -1);
                if (tmp != NULL) xmlFree(tmp);
                *prefix = p;
                return(l);
            }
            tmp = xmlBuildQName(BAD_CAST "", l, NULL, 0);
            l = xmlDictLookup(ctxt->dict, tmp, -1);
            if (tmp != NULL) xmlFree(tmp);
            *prefix = p;
            return(l);
        }
        *prefix = p;
    } else
        *prefix = NULL;
    return(l);
}

/**
 * xmlParseQNameAndCompare:
 * @ctxt:  an XML parser context
 * @name:  the localname
 * @prefix:  the prefix, if any.
 *
 * parse an XML name and compares for match
 * (specialized for endtag parsing)
 *
 * Returns NULL for an illegal name, (xmlChar*) 1 for success
 * and the name for mismatch
 */

static const xmlChar *
xmlParseQNameAndCompare(xmlParserCtxtPtr ctxt, xmlChar const *name,
                        xmlChar const *prefix) {
    const xmlChar *cmp;
    const xmlChar *in;
    const xmlChar *ret;
    const xmlChar *prefix2;

    if (prefix == NULL) return(xmlParseNameAndCompare(ctxt, name));

    GROW;
    in = ctxt->input->cur;

    cmp = prefix;
    while (*in != 0 && *in == *cmp) {
        ++in;
        ++cmp;
    }
    if ((*cmp == 0) && (*in == ':')) {
        in++;
        cmp = name;
        while (*in != 0 && *in == *cmp) {
            ++in;
            ++cmp;
        }
        if (*cmp == 0 && (*in == '>' || IS_BLANK_CH (*in))) {
            /* success */
            ctxt->input->cur = in;
            return((const xmlChar*) 1);
        }
    }
    /*
     * all strings coms from the dictionary, equality can be done directly
     */
    ret = xmlParseQName (ctxt, &prefix2);
    if ((ret == name) && (prefix == prefix2))
        return((const xmlChar*) 1);
    return ret;
}

/**
 * xmlParseAttValueInternal:
 * @ctxt:  an XML parser context
 * @len:  attribute len result
 * @alloc:  whether the attribute was reallocated as a new string
 * @normalize:  if 1 then further non-CDATA normalization must be done
 *
 * parse a value for an attribute.
 * NOTE: if no normalization is needed, the routine will return pointers
 *       directly from the data buffer.
 *
 * 3.3.3 Attribute-Value Normalization:
 * Before the value of an attribute is passed to the application or
 * checked for validity, the XML processor must normalize it as follows: 
 * - a character reference is processed by appending the referenced
 *   character to the attribute value
 * - an entity reference is processed by recursively processing the
 *   replacement text of the entity 
 * - a whitespace character (#x20, #xD, #xA, #x9) is processed by
 *   appending #x20 to the normalized value, except that only a single
 *   #x20 is appended for a "#xD#xA" sequence that is part of an external
 *   parsed entity or the literal entity value of an internal parsed entity 
 * - other characters are processed by appending them to the normalized value 
 * If the declared value is not CDATA, then the XML processor must further
 * process the normalized attribute value by discarding any leading and
 * trailing space (#x20) characters, and by replacing sequences of space
 * (#x20) characters by a single space (#x20) character.  
 * All attributes for which no declaration has been read should be treated
 * by a non-validating parser as if declared CDATA.
 *
 * Returns the AttValue parsed or NULL. The value has to be freed by the
 *     caller if it was copied, this can be detected by val[*len] == 0.
 */

static xmlChar *
xmlParseAttValueInternal(xmlParserCtxtPtr ctxt, int *len, int *alloc,
                         int normalize)
{
    xmlChar limit = 0;
    const xmlChar *in = NULL, *start, *end, *last;
    xmlChar *ret = NULL;

    GROW;
    in = (xmlChar *) CUR_PTR;
    if (*in != '"' && *in != '\'') {
        xmlFatalErr(ctxt, XML_ERR_ATTRIBUTE_NOT_STARTED, NULL);
        return (NULL);
    }
    ctxt->instate = XML_PARSER_ATTRIBUTE_VALUE;

    /*
     * try to handle in this routine the most common case where no
     * allocation of a new string is required and where content is
     * pure ASCII.
     */
    limit = *in++;
    end = ctxt->input->end;
    start = in;
    if (in >= end) {
        const xmlChar *oldbase = ctxt->input->base;
        GROW;
        if (oldbase != ctxt->input->base) {
            long delta = ctxt->input->base - oldbase;
            start = start + delta;
            in = in + delta;
        }
        end = ctxt->input->end;
    }
    if (normalize) {
        /*
         * Skip any leading spaces
         */
        while ((in < end) && (*in != limit) && 
               ((*in == 0x20) || (*in == 0x9) ||
                (*in == 0xA) || (*in == 0xD))) {
            in++;
            start = in;
            if (in >= end) {
                const xmlChar *oldbase = ctxt->input->base;
                GROW;
                if (ctxt->instate == XML_PARSER_EOF)
                    return(NULL);
                if (oldbase != ctxt->input->base) {
                    long delta = ctxt->input->base - oldbase;
                    start = start + delta;
                    in = in + delta;
                }
                end = ctxt->input->end;
            }
        }
        while ((in < end) && (*in != limit) && (*in >= 0x20) &&
               (*in <= 0x7f) && (*in != '&') && (*in != '<')) {
            if ((*in++ == 0x20) && (*in == 0x20)) break;
            if (in >= end) {
                const xmlChar *oldbase = ctxt->input->base;
                GROW;
                if (ctxt->instate == XML_PARSER_EOF)
                    return(NULL);
                if (oldbase != ctxt->input->base) {
                    long delta = ctxt->input->base - oldbase;
                    start = start + delta;
                    in = in + delta;
                }
                end = ctxt->input->end;
            }
        }
        last = in;
        /*
         * skip the trailing blanks
         */
        while ((last[-1] == 0x20) && (last > start)) last--;
        while ((in < end) && (*in != limit) && 
               ((*in == 0x20) || (*in == 0x9) ||
                (*in == 0xA) || (*in == 0xD))) {
            in++;
            if (in >= end) {
                const xmlChar *oldbase = ctxt->input->base;
                GROW;
                if (ctxt->instate == XML_PARSER_EOF)
                    return(NULL);
                if (oldbase != ctxt->input->base) {
                    long delta = ctxt->input->base - oldbase;
                    start = start + delta;
                    in = in + delta;
                    last = last + delta;
                }
                end = ctxt->input->end;
            }
        }
        if (*in != limit) goto need_complex;
    } else {
        while ((in < end) && (*in != limit) && (*in >= 0x20) &&
               (*in <= 0x7f) && (*in != '&') && (*in != '<')) {
            in++;
            if (in >= end) {
                const xmlChar *oldbase = ctxt->input->base;
                GROW;
                if (ctxt->instate == XML_PARSER_EOF)
                    return(NULL);
                if (oldbase != ctxt->input->base) {
                    long delta = ctxt->input->base - oldbase;
                    start = start + delta;
                    in = in + delta;
                }
                end = ctxt->input->end;
            }
        }
        last = in;
        if (*in != limit) goto need_complex;
    }
    in++;
    if (len != NULL) {
        *len = last - start;
        ret = (xmlChar *) start;
    } else {
        if (alloc) *alloc = 1;
        ret = xmlStrndup(start, last - start);
    }
    CUR_PTR = in;
    if (alloc) *alloc = 0;
    return ret;
need_complex:
    if (alloc) *alloc = 1;
    return xmlParseAttValueComplex(ctxt, len, normalize);
}

/**
 * xmlParseAttribute2:
 * @ctxt:  an XML parser context
 * @pref:  the element prefix
 * @elem:  the element name
 * @prefix:  a xmlChar ** used to store the value of the attribute prefix
 * @value:  a xmlChar ** used to store the value of the attribute
 * @len:  an int * to save the length of the attribute
 * @alloc:  an int * to indicate if the attribute was allocated
 *
 * parse an attribute in the new SAX2 framework.
 *
 * Returns the attribute name, and the value in *value, .
 */

static const xmlChar *
xmlParseAttribute2(xmlParserCtxtPtr ctxt,
                   const xmlChar * pref, const xmlChar * elem,
                   const xmlChar ** prefix, xmlChar ** value,
                   int *len, int *alloc)
{
    const xmlChar *name;
    xmlChar *val, *internal_val = NULL;
    int normalize = 0;

    *value = NULL;
    GROW;
    name = xmlParseQName(ctxt, prefix);
    if (name == NULL) {
        xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
                       "error parsing attribute name\n");
        return (NULL);
    }

    /*
     * get the type if needed
     */
    if (ctxt->attsSpecial != NULL) {
        int type;

        type = (int) (long) xmlHashQLookup2(ctxt->attsSpecial,
                                            pref, elem, *prefix, name);
        if (type != 0)
            normalize = 1;
    }

    /*
     * read the value
     */
    SKIP_BLANKS;
    if (RAW == '=') {
        NEXT;
        SKIP_BLANKS;
        val = xmlParseAttValueInternal(ctxt, len, alloc, normalize);
        if (normalize) {
            /*
             * Sometimes a second normalisation pass for spaces is needed
             * but that only happens if charrefs or entities refernces
             * have been used in the attribute value, i.e. the attribute
             * value have been extracted in an allocated string already.
             */
            if (*alloc) {
                const xmlChar *val2;

                val2 = xmlAttrNormalizeSpace2(ctxt, val, len);
                if ((val2 != NULL) && (val2 != val)) {
                    xmlFree(val);
                    val = (xmlChar *) val2;
                }
            }
        }
        ctxt->instate = XML_PARSER_CONTENT;
    } else {
        xmlFatalErrMsgStr(ctxt, XML_ERR_ATTRIBUTE_WITHOUT_VALUE,
                          "Specification mandate value for attribute %s\n",
                          name);
        return (NULL);
    }

    if (*prefix == ctxt->str_xml) {
        /*
         * Check that xml:lang conforms to the specification
         * No more registered as an error, just generate a warning now
         * since this was deprecated in XML second edition
         */
        if ((ctxt->pedantic) && (xmlStrEqual(name, BAD_CAST "lang"))) {
            internal_val = xmlStrndup(val, *len);
            if (!xmlCheckLanguageID(internal_val)) {
                xmlWarningMsg(ctxt, XML_WAR_LANG_VALUE,
                              "Malformed value for xml:lang : %s\n",
                              internal_val, NULL);
            }
        }

        /*
         * Check that xml:space conforms to the specification
         */
        if (xmlStrEqual(name, BAD_CAST "space")) {
            internal_val = xmlStrndup(val, *len);
            if (xmlStrEqual(internal_val, BAD_CAST "default"))
                *(ctxt->space) = 0;
            else if (xmlStrEqual(internal_val, BAD_CAST "preserve"))
                *(ctxt->space) = 1;
            else {
                xmlWarningMsg(ctxt, XML_WAR_SPACE_VALUE,
                              "Invalid value \"%s\" for xml:space : \"default\" or \"preserve\" expected\n",
                              internal_val, NULL);
            }
        }
        if (internal_val) {
            xmlFree(internal_val);
        }
    }

    *value = val;
    return (name);
}
/**
 * xmlParseStartTag2:
 * @ctxt:  an XML parser context
 * 
 * parse a start of tag either for rule element or
 * EmptyElement. In both case we don't parse the tag closing chars.
 * This routine is called when running SAX2 parsing
 *
 * [40] STag ::= '<' Name (S Attribute)* S? '>'
 *
 * [ WFC: Unique Att Spec ]
 * No attribute name may appear more than once in the same start-tag or
 * empty-element tag. 
 *
 * [44] EmptyElemTag ::= '<' Name (S Attribute)* S? '/>'
 *
 * [ WFC: Unique Att Spec ]
 * No attribute name may appear more than once in the same start-tag or
 * empty-element tag. 
 *
 * With namespace:
 *
 * [NS 8] STag ::= '<' QName (S Attribute)* S? '>'
 *
 * [NS 10] EmptyElement ::= '<' QName (S Attribute)* S? '/>'
 *
 * Returns the element name parsed
 */

static const xmlChar *
xmlParseStartTag2(xmlParserCtxtPtr ctxt, const xmlChar **pref,
                  const xmlChar **URI, int *tlen) {
    const xmlChar *localname;
    const xmlChar *prefix;
    const xmlChar *attname;
    const xmlChar *aprefix;
    const xmlChar *nsname;
    xmlChar *attvalue;
    const xmlChar **atts = ctxt->atts;
    int maxatts = ctxt->maxatts;
    int nratts, nbatts, nbdef;
    int i, j, nbNs, attval, oldline, oldcol;
    const xmlChar *base;
    unsigned long cur;
    int nsNr = ctxt->nsNr;

    if (RAW != '<') return(NULL);
    NEXT1;

    /*
     * NOTE: it is crucial with the SAX2 API to never call SHRINK beyond that
     *       point since the attribute values may be stored as pointers to
     *       the buffer and calling SHRINK would destroy them !
     *       The Shrinking is only possible once the full set of attribute
     *       callbacks have been done.
     */
reparse:
    SHRINK;
    base = ctxt->input->base;
    cur = ctxt->input->cur - ctxt->input->base;
    oldline = ctxt->input->line;
    oldcol = ctxt->input->col;
    nbatts = 0;
    nratts = 0;
    nbdef = 0;
    nbNs = 0;
    attval = 0;
    /* Forget any namespaces added during an earlier parse of this element. */
    ctxt->nsNr = nsNr;

    localname = xmlParseQName(ctxt, &prefix);
    if (localname == NULL) {
        xmlFatalErrMsg(ctxt, XML_ERR_NAME_REQUIRED,
                       "StartTag: invalid element name\n");
        return(NULL);
    }
    *tlen = ctxt->input->cur - ctxt->input->base - cur;

    /*
     * Now parse the attributes, it ends up with the ending
     *
     * (S Attribute)* S?
     */
    SKIP_BLANKS;
    GROW;
    if (ctxt->input->base != base) goto base_changed;

    while (((RAW != '>') && 
           ((RAW != '/') || (NXT(1) != '>')) &&
           (IS_BYTE_CHAR(RAW))) && (ctxt->instate != XML_PARSER_EOF)) {
        const xmlChar *q = CUR_PTR;
        unsigned int cons = ctxt->input->consumed;
        int len = -1, alloc = 0;

        attname = xmlParseAttribute2(ctxt, prefix, localname,
                                     &aprefix, &attvalue, &len, &alloc);
        if (ctxt->input->base != base) {
            if ((attvalue != NULL) && (alloc != 0))
                xmlFree(attvalue);
            attvalue = NULL;
            goto base_changed;
        }
        if ((attname != NULL) && (attvalue != NULL)) {
            if (len < 0) len = xmlStrlen(attvalue);
            if ((attname == ctxt->str_xmlns) && (aprefix == NULL)) {
                const xmlChar *URL = xmlDictLookup(ctxt->dict, attvalue, len);
                xmlURIPtr uri;

                if (*URL != 0) {
                    uri = xmlParseURI((const char *) URL);
                    if (uri == NULL) {
                        xmlNsErr(ctxt, XML_WAR_NS_URI,
                                 "xmlns: '%s' is not a valid URI\n",
                                           URL, NULL, NULL);
                    } else {
                        if (uri->scheme == NULL) {
                            xmlNsWarn(ctxt, XML_WAR_NS_URI_RELATIVE,
                                      "xmlns: URI %s is not absolute\n",
                                      URL, NULL, NULL);
                        }
                        xmlFreeURI(uri);
                    }
                    if (URL == ctxt->str_xml_ns) {
                        if (attname != ctxt->str_xml) {
                            xmlNsErr(ctxt, XML_NS_ERR_XML_NAMESPACE,
                         "xml namespace URI cannot be the default namespace\n",
                                     NULL, NULL, NULL);
                        }
                        goto skip_default_ns;
                    }
                    if ((len == 29) &&
                        (xmlStrEqual(URL,
                                 BAD_CAST "http://www.w3.org/2000/xmlns/"))) {
                        xmlNsErr(ctxt, XML_NS_ERR_XML_NAMESPACE,
                             "reuse of the xmlns namespace name is forbidden\n",
                                 NULL, NULL, NULL);
                        goto skip_default_ns;
                    }
                }
                /*
                 * check that it's not a defined namespace
                 */
                for (j = 1;j <= nbNs;j++)
                    if (ctxt->nsTab[ctxt->nsNr - 2 * j] == NULL)
                        break;
                if (j <= nbNs)
                    xmlErrAttributeDup(ctxt, NULL, attname);
                else
                    if (nsPush(ctxt, NULL, URL) > 0) nbNs++;
skip_default_ns:
                if (alloc != 0) xmlFree(attvalue);
                SKIP_BLANKS;
                continue;
            }
            if (aprefix == ctxt->str_xmlns) {
                const xmlChar *URL = xmlDictLookup(ctxt->dict, attvalue, len);
                xmlURIPtr uri;

                if (attname == ctxt->str_xml) {
                    if (URL != ctxt->str_xml_ns) {
                        xmlNsErr(ctxt, XML_NS_ERR_XML_NAMESPACE,
                                 "xml namespace prefix mapped to wrong URI\n",
                                 NULL, NULL, NULL);
                    }
                    /*
                     * Do not keep a namespace definition node
                     */
                    goto skip_ns;
                }
                if (URL == ctxt->str_xml_ns) {
                    if (attname != ctxt->str_xml) {
                        xmlNsErr(ctxt, XML_NS_ERR_XML_NAMESPACE,
                                 "xml namespace URI mapped to wrong prefix\n",
                                 NULL, NULL, NULL);
                    }
                    goto skip_ns;
                }
                if (attname == ctxt->str_xmlns) {
                    xmlNsErr(ctxt, XML_NS_ERR_XML_NAMESPACE,
                             "redefinition of the xmlns prefix is forbidden\n",
                             NULL, NULL, NULL);
                    goto skip_ns;
                }
                if ((len == 29) &&
                    (xmlStrEqual(URL,
                                 BAD_CAST "http://www.w3.org/2000/xmlns/"))) {
                    xmlNsErr(ctxt, XML_NS_ERR_XML_NAMESPACE,
                             "reuse of the xmlns namespace name is forbidden\n",
                             NULL, NULL, NULL);
                    goto skip_ns;
                }
                if ((URL == NULL) || (URL[0] == 0)) {
                    xmlNsErr(ctxt, XML_NS_ERR_XML_NAMESPACE,
                             "xmlns:%s: Empty XML namespace is not allowed\n",
                                  attname, NULL, NULL);
                    goto skip_ns;
                } else {
                    uri = xmlParseURI((const char *) URL);
                    if (uri == NULL) {
                        xmlNsErr(ctxt, XML_WAR_NS_URI,
                             "xmlns:%s: '%s' is not a valid URI\n",
                                           attname, URL, NULL);
                    } else {
                        if ((ctxt->pedantic) && (uri->scheme == NULL)) {
                            xmlNsWarn(ctxt, XML_WAR_NS_URI_RELATIVE,
                                      "xmlns:%s: URI %s is not absolute\n",
                                      attname, URL, NULL);
                        }
                        xmlFreeURI(uri);
                    }
                }

                /*
                 * check that it's not a defined namespace
                 */
                for (j = 1;j <= nbNs;j++)
                    if (ctxt->nsTab[ctxt->nsNr - 2 * j] == attname)
                        break;
                if (j <= nbNs)
                    xmlErrAttributeDup(ctxt, aprefix, attname);
                else
                    if (nsPush(ctxt, attname, URL) > 0) nbNs++;
skip_ns:
                if (alloc != 0) xmlFree(attvalue);
                SKIP_BLANKS;
                if (ctxt->input->base != base) goto base_changed;
                continue;
            }

            /*
             * Add the pair to atts
             */
            if ((atts == NULL) || (nbatts + 5 > maxatts)) {
                if (xmlCtxtGrowAttrs(ctxt, nbatts + 5) < 0) {
                    if (attvalue[len] == 0)
                        xmlFree(attvalue);
                    goto failed;
                }
                maxatts = ctxt->maxatts;
                atts = ctxt->atts;
            }
            ctxt->attallocs[nratts++] = alloc;
            atts[nbatts++] = attname;
            atts[nbatts++] = aprefix;
            atts[nbatts++] = NULL; /* the URI will be fetched later */
            atts[nbatts++] = attvalue;
            attvalue += len;
            atts[nbatts++] = attvalue;
            /*
             * tag if some deallocation is needed
             */
            if (alloc != 0) attval = 1;
        } else {
            if ((attvalue != NULL) && (attvalue[len] == 0))
                xmlFree(attvalue);
        }

failed:

        GROW
        if (ctxt->instate == XML_PARSER_EOF)
            break;
        if (ctxt->input->base != base) goto base_changed;
        if ((RAW == '>') || (((RAW == '/') && (NXT(1) == '>'))))
            break;
        if (!IS_BLANK_CH(RAW)) {
            xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                           "attributes construct error\n");
            break;
        }
        SKIP_BLANKS;
        if ((cons == ctxt->input->consumed) && (q == CUR_PTR) &&
            (attname == NULL) && (attvalue == NULL)) {
            xmlFatalErr(ctxt, XML_ERR_INTERNAL_ERROR,
                 "xmlParseStartTag: problem parsing attributes\n");
            break;
        }
        GROW;
        if (ctxt->input->base != base) goto base_changed;
    }

    /*
     * The attributes defaulting
     */
    if (ctxt->attsDefault != NULL) {
        xmlDefAttrsPtr defaults;

        defaults = xmlHashLookup2(ctxt->attsDefault, localname, prefix);
        if (defaults != NULL) {
            for (i = 0;i < defaults->nbAttrs;i++) {
                attname = defaults->values[5 * i];
                aprefix = defaults->values[5 * i + 1];

                /*
                 * special work for namespaces defaulted defs
                 */
                if ((attname == ctxt->str_xmlns) && (aprefix == NULL)) {
                    /*
                     * check that it's not a defined namespace
                     */
                    for (j = 1;j <= nbNs;j++)
                        if (ctxt->nsTab[ctxt->nsNr - 2 * j] == NULL)
                            break;
                    if (j <= nbNs) continue;

                    nsname = xmlGetNamespace(ctxt, NULL);
                    if (nsname != defaults->values[5 * i + 2]) {
                        if (nsPush(ctxt, NULL,
                                   defaults->values[5 * i + 2]) > 0)
                            nbNs++;
                    }
                } else if (aprefix == ctxt->str_xmlns) {
                    /*
                     * check that it's not a defined namespace
                     */
                    for (j = 1;j <= nbNs;j++)
                        if (ctxt->nsTab[ctxt->nsNr - 2 * j] == attname)
                            break;
                    if (j <= nbNs) continue;

                    nsname = xmlGetNamespace(ctxt, attname);
                    if (nsname != defaults->values[2]) {
                        if (nsPush(ctxt, attname,
                                   defaults->values[5 * i + 2]) > 0)
                            nbNs++;
                    }
                } else {
                    /*
                     * check that it's not a defined attribute
                     */
                    for (j = 0;j < nbatts;j+=5) {
                        if ((attname == atts[j]) && (aprefix == atts[j+1]))
                            break;
                    }
                    if (j < nbatts) continue;

                    if ((atts == NULL) || (nbatts + 5 > maxatts)) {
                        if (xmlCtxtGrowAttrs(ctxt, nbatts + 5) < 0) {
                            return(NULL);
                        }
                        maxatts = ctxt->maxatts;
                        atts = ctxt->atts;
                    }
                    atts[nbatts++] = attname;
                    atts[nbatts++] = aprefix;
                    if (aprefix == NULL)
                        atts[nbatts++] = NULL;
                    else
                        atts[nbatts++] = xmlGetNamespace(ctxt, aprefix);
                    atts[nbatts++] = defaults->values[5 * i + 2];
                    atts[nbatts++] = defaults->values[5 * i + 3];
                    if ((ctxt->standalone == 1) &&
                        (defaults->values[5 * i + 4] != NULL)) {
                        xmlValidityError(ctxt, XML_DTD_STANDALONE_DEFAULTED, 
          "standalone: attribute %s on %s defaulted from external subset\n",
                                         attname, localname);
                    }
                    nbdef++;
                }
            }
        }
    }

    /*
     * The attributes checkings
     */
    for (i = 0; i < nbatts;i += 5) {
        /*
        * The default namespace does not apply to attribute names.
        */
        if (atts[i + 1] != NULL) {
            nsname = xmlGetNamespace(ctxt, atts[i + 1]);
            if (nsname == NULL) {
                xmlNsErr(ctxt, XML_NS_ERR_UNDEFINED_NAMESPACE,
                    "Namespace prefix %s for %s on %s is not defined\n",
                    atts[i + 1], atts[i], localname);
            }
            atts[i + 2] = nsname;
        } else
            nsname = NULL;
        /*
         * [ WFC: Unique Att Spec ]
         * No attribute name may appear more than once in the same
         * start-tag or empty-element tag. 
         * As extended by the Namespace in XML REC.
         */
        for (j = 0; j < i;j += 5) {
            if (atts[i] == atts[j]) {
                if (atts[i+1] == atts[j+1]) {
                    xmlErrAttributeDup(ctxt, atts[i+1], atts[i]);
                    break;
                }
                if ((nsname != NULL) && (atts[j + 2] == nsname)) {
                    xmlNsErr(ctxt, XML_NS_ERR_ATTRIBUTE_REDEFINED,
                             "Namespaced Attribute %s in '%s' redefined\n",
                             atts[i], nsname, NULL);
                    break;
                }
            }
        }
    }

    nsname = xmlGetNamespace(ctxt, prefix);
    if ((prefix != NULL) && (nsname == NULL)) {
        xmlNsErr(ctxt, XML_NS_ERR_UNDEFINED_NAMESPACE,
                 "Namespace prefix %s on %s is not defined\n",
                 prefix, localname, NULL);
    }
    *pref = prefix;
    *URI = nsname;

    /*
     * SAX: Start of Element !
     */
    if ((ctxt->sax != NULL) && (ctxt->sax->startElementNs != NULL) &&
        (!ctxt->disableSAX)) {
        if (nbNs > 0)
            ctxt->sax->startElementNs(ctxt->userData, localname, prefix,
                          nsname, nbNs, &ctxt->nsTab[ctxt->nsNr - 2 * nbNs],
                          nbatts / 5, nbdef, atts);
        else
            ctxt->sax->startElementNs(ctxt->userData, localname, prefix,
                          nsname, 0, NULL, nbatts / 5, nbdef, atts);
    }

    /*
     * Free up attribute allocated strings if needed
     */
    if (attval != 0) {
        for (i = 3,j = 0; j < nratts;i += 5,j++)
            if ((ctxt->attallocs[j] != 0) && (atts[i] != NULL))
                xmlFree((xmlChar *) atts[i]);
    }

    return(localname);

base_changed:
    /*
     * the attribute strings are valid iif the base didn't changed
     */
    if (attval != 0) {
        for (i = 3,j = 0; j < nratts;i += 5,j++)
            if ((ctxt->attallocs[j] != 0) && (atts[i] != NULL))
                xmlFree((xmlChar *) atts[i]);
    }
    ctxt->input->cur = ctxt->input->base + cur;
    ctxt->input->line = oldline;
    ctxt->input->col = oldcol;
    if (ctxt->wellFormed == 1) {
        goto reparse;
    }
    return(NULL);
}

/**
 * xmlParseEndTag2:
 * @ctxt:  an XML parser context
 * @line:  line of the start tag
 * @nsNr:  number of namespaces on the start tag
 *
 * parse an end of tag
 *
 * [42] ETag ::= '</' Name S? '>'
 *
 * With namespace
 *
 * [NS 9] ETag ::= '</' QName S? '>'
 */

static void
xmlParseEndTag2(xmlParserCtxtPtr ctxt, const xmlChar *prefix,
                const xmlChar *URI, int line, int nsNr, int tlen) {
    const xmlChar *name;

    GROW;
    if ((RAW != '<') || (NXT(1) != '/')) {
        xmlFatalErr(ctxt, XML_ERR_LTSLASH_REQUIRED, NULL);
        return;
    }
    SKIP(2);

    if ((tlen > 0) && (xmlStrncmp(ctxt->input->cur, ctxt->name, tlen) == 0)) {
        if (ctxt->input->cur[tlen] == '>') {
            ctxt->input->cur += tlen + 1;
            goto done;
        }
        ctxt->input->cur += tlen;
        name = (xmlChar*)1;
    } else {
        if (prefix == NULL)
            name = xmlParseNameAndCompare(ctxt, ctxt->name);
        else
            name = xmlParseQNameAndCompare(ctxt, ctxt->name, prefix);
    }

    /*
     * We should definitely be at the ending "S? '>'" part
     */
    GROW;
    if (ctxt->instate == XML_PARSER_EOF)
        return;
    SKIP_BLANKS;
    if ((!IS_BYTE_CHAR(RAW)) || (RAW != '>')) {
        xmlFatalErr(ctxt, XML_ERR_GT_REQUIRED, NULL);
    } else
        NEXT1;

    /*
     * [ WFC: Element Type Match ]
     * The Name in an element's end-tag must match the element type in the
     * start-tag. 
     *
     */
    if (name != (xmlChar*)1) {
        if (name == NULL) name = BAD_CAST "unparseable";
        if ((line == 0) && (ctxt->node != NULL))
            line = ctxt->node->line;
        xmlFatalErrMsgStrIntStr(ctxt, XML_ERR_TAG_NAME_MISMATCH,
                     "Opening and ending tag mismatch: %s line %d and %s\n",
                                ctxt->name, line, name);
    }

    /*
     * SAX: End of Tag
     */
done:
    if ((ctxt->sax != NULL) && (ctxt->sax->endElementNs != NULL) &&
        (!ctxt->disableSAX))
        ctxt->sax->endElementNs(ctxt->userData, ctxt->name, prefix, URI);

    spacePop(ctxt);
    if (nsNr != 0)
        nsPop(ctxt, nsNr);
    return;
}

/**
 * xmlParseCDSect:
 * @ctxt:  an XML parser context
 * 
 * Parse escaped pure raw content.
 *
 * [18] CDSect ::= CDStart CData CDEnd
 *
 * [19] CDStart ::= '<![CDATA['
 *
 * [20] Data ::= (Char* - (Char* ']]>' Char*))
 *
 * [21] CDEnd ::= ']]>'
 */
void
xmlParseCDSect(xmlParserCtxtPtr ctxt) {
    xmlChar *buf = NULL;
    int len = 0;
    int size = XML_PARSER_BUFFER_SIZE;
    int r, rl;
    int s, sl;
    int cur, l;
    int count = 0;

    /* Check 2.6.0 was NXT(0) not RAW */
    if (CMP9(CUR_PTR, '<', '!', '[', 'C', 'D', 'A', 'T', 'A', '[')) {
        SKIP(9);
    } else
        return;

    ctxt->instate = XML_PARSER_CDATA_SECTION;
    r = CUR_CHAR(rl);
    if (!IS_CHAR(r)) {
        xmlFatalErr(ctxt, XML_ERR_CDATA_NOT_FINISHED, NULL);
        ctxt->instate = XML_PARSER_CONTENT;
        return;
    }
    NEXTL(rl);
    s = CUR_CHAR(sl);
    if (!IS_CHAR(s)) {
        xmlFatalErr(ctxt, XML_ERR_CDATA_NOT_FINISHED, NULL);
        ctxt->instate = XML_PARSER_CONTENT;
        return;
    }
    NEXTL(sl);
    cur = CUR_CHAR(l);
    buf = (xmlChar *) xmlMallocAtomic(size * sizeof(xmlChar));
    if (buf == NULL) {
        xmlErrMemory(ctxt, NULL);
        return;
    }
    while (IS_CHAR(cur) &&
           ((r != ']') || (s != ']') || (cur != '>'))) {
        if (len + 5 >= size) {
            xmlChar *tmp;

            size *= 2;
            tmp = (xmlChar *) xmlRealloc(buf, size * sizeof(xmlChar));
            if (tmp == NULL) {
                xmlFree(buf);
                xmlErrMemory(ctxt, NULL);
                return;
            }
            buf = tmp;
        }
        COPY_BUF(rl,buf,len,r);
        r = s;
        rl = sl;
        s = cur;
        sl = l;
        count++;
        if (count > 50) {
            GROW;
            if (ctxt->instate == XML_PARSER_EOF) {
                xmlFree(buf);
                return;
            }
            count = 0;
        }
        NEXTL(l);
        cur = CUR_CHAR(l);
    }
    buf[len] = 0;
    ctxt->instate = XML_PARSER_CONTENT;
    if (cur != '>') {
        xmlFatalErrMsgStr(ctxt, XML_ERR_CDATA_NOT_FINISHED,
                             "CData section not finished\n%.50s\n", buf);
        xmlFree(buf);
        return;
    }
    NEXTL(l);

    /*
     * OK the buffer is to be consumed as cdata.
     */
    if ((ctxt->sax != NULL) && (!ctxt->disableSAX)) {
        if (ctxt->sax->cdataBlock != NULL)
            ctxt->sax->cdataBlock(ctxt->userData, buf, len);
        else if (ctxt->sax->characters != NULL)
            ctxt->sax->characters(ctxt->userData, buf, len);
    }
    xmlFree(buf);
}

/**
 * xmlParseContent:
 * @ctxt:  an XML parser context
 *
 * Parse a content:
 *
 * [43] content ::= (element | CharData | Reference | CDSect | PI | Comment)*
 */

void
xmlParseContent(xmlParserCtxtPtr ctxt) {
    GROW;
    while ((RAW != 0) &&
           ((RAW != '<') || (NXT(1) != '/')) &&
           (ctxt->instate != XML_PARSER_EOF)) {
        const xmlChar *test = CUR_PTR;
        unsigned int cons = ctxt->input->consumed;
        const xmlChar *cur = ctxt->input->cur;

        /*
         * First case : a Processing Instruction.
         */
        if ((*cur == '<') && (cur[1] == '?')) {
            xmlParsePI(ctxt);
        }

        /*
         * Second case : a CDSection
         */
        /* 2.6.0 test was *cur not RAW */
        else if (CMP9(CUR_PTR, '<', '!', '[', 'C', 'D', 'A', 'T', 'A', '[')) {
            xmlParseCDSect(ctxt);
        }

        /*
         * Third case :  a comment
         */
        else if ((*cur == '<') && (NXT(1) == '!') &&
                 (NXT(2) == '-') && (NXT(3) == '-')) {
            xmlParseComment(ctxt);
            ctxt->instate = XML_PARSER_CONTENT;
        }

        /*
         * Fourth case :  a sub-element.
         */
        else if (*cur == '<') {
            xmlParseElement(ctxt);
        }

        /*
         * Fifth case : a reference. If if has not been resolved,
         *    parsing returns it's Name, create the node 
         */

        else if (*cur == '&') {
            xmlParseReference(ctxt);
        }

        /*
         * Last case, text. Note that References are handled directly.
         */
        else {
            xmlParseCharData(ctxt, 0);
        }

        GROW;
        /*
         * Pop-up of finished entities.
         */
        while ((RAW == 0) && (ctxt->inputNr > 1))
            xmlPopInput(ctxt);
        SHRINK;

        if ((cons == ctxt->input->consumed) && (test == CUR_PTR)) {
            xmlFatalErr(ctxt, XML_ERR_INTERNAL_ERROR,
                        "detected an error in element content\n");
            ctxt->instate = XML_PARSER_EOF;
            break;
        }
    }
}

/**
 * xmlParseElement:
 * @ctxt:  an XML parser context
 *
 * parse an XML element, this is highly recursive
 *
 * [39] element ::= EmptyElemTag | STag content ETag
 *
 * [ WFC: Element Type Match ]
 * The Name in an element's end-tag must match the element type in the
 * start-tag. 
 *
 */

void
xmlParseElement(xmlParserCtxtPtr ctxt) {
    const xmlChar *name;
    const xmlChar *prefix = NULL;
    const xmlChar *URI = NULL;
    xmlParserNodeInfo node_info;
    int line, tlen;
    xmlNodePtr ret;
    int nsNr = ctxt->nsNr;

    if (((unsigned int) ctxt->nameNr > xmlParserMaxDepth) &&
        ((ctxt->options & XML_PARSE_HUGE) == 0)) {
        xmlFatalErrMsgInt(ctxt, XML_ERR_INTERNAL_ERROR,
                 "Excessive depth in document: %d use XML_PARSE_HUGE option\n",
                          xmlParserMaxDepth);
        ctxt->instate = XML_PARSER_EOF;
        return;
    }

    /* Capture start position */
    if (ctxt->record_info) {
        node_info.begin_pos = ctxt->input->consumed +
                          (CUR_PTR - ctxt->input->base);
        node_info.begin_line = ctxt->input->line;
    }

    if (ctxt->spaceNr == 0)
        spacePush(ctxt, -1);
    else if (*ctxt->space == -2)
        spacePush(ctxt, -1);
    else
        spacePush(ctxt, *ctxt->space);

    line = ctxt->input->line;
#ifdef LIBXML_SAX1_ENABLED
    if (ctxt->sax2)
#endif /* LIBXML_SAX1_ENABLED */
        name = xmlParseStartTag2(ctxt, &prefix, &URI, &tlen);
#ifdef LIBXML_SAX1_ENABLED
    else
        name = xmlParseStartTag(ctxt);
#endif /* LIBXML_SAX1_ENABLED */
    if (ctxt->instate == XML_PARSER_EOF)
        return;
    if (name == NULL) {
        spacePop(ctxt);
        return;
    }
    namePush(ctxt, name);
    ret = ctxt->node;

#ifdef LIBXML_VALID_ENABLED
    /*
     * [ VC: Root Element Type ]
     * The Name in the document type declaration must match the element
     * type of the root element. 
     */
    if (ctxt->validate && ctxt->wellFormed && ctxt->myDoc &&
        ctxt->node && (ctxt->node == ctxt->myDoc->children))
        ctxt->valid &= xmlValidateRoot(&ctxt->vctxt, ctxt->myDoc);
#endif /* LIBXML_VALID_ENABLED */

    /*
     * Check for an Empty Element.
     */
    if ((RAW == '/') && (NXT(1) == '>')) {
        SKIP(2);
        if (ctxt->sax2) {
            if ((ctxt->sax != NULL) && (ctxt->sax->endElementNs != NULL) &&
                (!ctxt->disableSAX))
                ctxt->sax->endElementNs(ctxt->userData, name, prefix, URI);
#ifdef LIBXML_SAX1_ENABLED
        } else {
            if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL) &&
                (!ctxt->disableSAX))
                ctxt->sax->endElement(ctxt->userData, name);
#endif /* LIBXML_SAX1_ENABLED */
        }
        namePop(ctxt);
        spacePop(ctxt);
        if (nsNr != ctxt->nsNr)
            nsPop(ctxt, ctxt->nsNr - nsNr);
        if ( ret != NULL && ctxt->record_info ) {
           node_info.end_pos = ctxt->input->consumed +
                              (CUR_PTR - ctxt->input->base);
           node_info.end_line = ctxt->input->line;
           node_info.node = ret;
           xmlParserAddNodeInfo(ctxt, &node_info);
        }
        return;
    }
    if (RAW == '>') {
        NEXT1;
    } else {
        xmlFatalErrMsgStrIntStr(ctxt, XML_ERR_GT_REQUIRED,
                     "Couldn't find end of Start Tag %s line %d\n",
                                name, line, NULL);

        /*
         * end of parsing of this node.
         */
        nodePop(ctxt);
        namePop(ctxt);
        spacePop(ctxt);
        if (nsNr != ctxt->nsNr)
            nsPop(ctxt, ctxt->nsNr - nsNr);

        /*
         * Capture end position and add node
         */
        if ( ret != NULL && ctxt->record_info ) {
           node_info.end_pos = ctxt->input->consumed +
                              (CUR_PTR - ctxt->input->base);
           node_info.end_line = ctxt->input->line;
           node_info.node = ret;
           xmlParserAddNodeInfo(ctxt, &node_info);
        }
        return;
    }

    /*
     * Parse the content of the element:
     */
    xmlParseContent(ctxt);
    if (ctxt->instate == XML_PARSER_EOF)
        return;
    if (!IS_BYTE_CHAR(RAW)) {
        xmlFatalErrMsgStrIntStr(ctxt, XML_ERR_TAG_NOT_FINISHED,
         "Premature end of data in tag %s line %d\n",
                                name, line, NULL);

        /*
         * end of parsing of this node.
         */
        nodePop(ctxt);
        namePop(ctxt);
        spacePop(ctxt);
        if (nsNr != ctxt->nsNr)
            nsPop(ctxt, ctxt->nsNr - nsNr);
        return;
    }

    /*
     * parse the end of tag: '</' should be here.
     */
    if (ctxt->sax2) {
        xmlParseEndTag2(ctxt, prefix, URI, line, ctxt->nsNr - nsNr, tlen);
        namePop(ctxt);
    }
#ifdef LIBXML_SAX1_ENABLED
      else
        xmlParseEndTag1(ctxt, line);
#endif /* LIBXML_SAX1_ENABLED */

    /*
     * Capture end position and add node
     */
    if ( ret != NULL && ctxt->record_info ) {
       node_info.end_pos = ctxt->input->consumed +
                          (CUR_PTR - ctxt->input->base);
       node_info.end_line = ctxt->input->line;
       node_info.node = ret;
       xmlParserAddNodeInfo(ctxt, &node_info);
    }
}

/**
 * xmlParseVersionNum:
 * @ctxt:  an XML parser context
 *
 * parse the XML version value.
 *
 * [26] VersionNum ::= '1.' [0-9]+
 *
 * In practice allow [0-9].[0-9]+ at that level
 *
 * Returns the string giving the XML version number, or NULL
 */
xmlChar *
xmlParseVersionNum(xmlParserCtxtPtr ctxt) {
    xmlChar *buf = NULL;
    int len = 0;
    int size = 10;
    xmlChar cur;

    buf = (xmlChar *) xmlMallocAtomic(size * sizeof(xmlChar));
    if (buf == NULL) {
        xmlErrMemory(ctxt, NULL);
        return(NULL);
    }
    cur = CUR;
    if (!((cur >= '0') && (cur <= '9'))) {
        xmlFree(buf);
        return(NULL);
    }
    buf[len++] = cur;
    NEXT;
    cur=CUR;
    if (cur != '.') {
        xmlFree(buf);
        return(NULL);
    }
    buf[len++] = cur;
    NEXT;
    cur=CUR;
    while ((cur >= '0') && (cur <= '9')) {
        if (len + 1 >= size) {
            xmlChar *tmp;

            size *= 2;
            tmp = (xmlChar *) xmlRealloc(buf, size * sizeof(xmlChar));
            if (tmp == NULL) {
                xmlFree(buf);
                xmlErrMemory(ctxt, NULL);
                return(NULL);
            }
            buf = tmp;
        }
        buf[len++] = cur;
        NEXT;
        cur=CUR;
    }
    buf[len] = 0;
    return(buf);
}

/**
 * xmlParseVersionInfo:
 * @ctxt:  an XML parser context
 *
 * parse the XML version.
 *
 * [24] VersionInfo ::= S 'version' Eq (' VersionNum ' | " VersionNum ")
 *
 * [25] Eq ::= S? '=' S?
 *
 * Returns the version string, e.g. "1.0"
 */

xmlChar *
xmlParseVersionInfo(xmlParserCtxtPtr ctxt) {
    xmlChar *version = NULL;

    if (CMP7(CUR_PTR, 'v', 'e', 'r', 's', 'i', 'o', 'n')) {
        SKIP(7);
        SKIP_BLANKS;
        if (RAW != '=') {
            xmlFatalErr(ctxt, XML_ERR_EQUAL_REQUIRED, NULL);
            return(NULL);
        }
        NEXT;
        SKIP_BLANKS;
        if (RAW == '"') {
            NEXT;
            version = xmlParseVersionNum(ctxt);
            if (RAW != '"') {
                xmlFatalErr(ctxt, XML_ERR_STRING_NOT_CLOSED, NULL);
            } else
                NEXT;
        } else if (RAW == '\''){
            NEXT;
            version = xmlParseVersionNum(ctxt);
            if (RAW != '\'') {
                xmlFatalErr(ctxt, XML_ERR_STRING_NOT_CLOSED, NULL);
            } else
                NEXT;
        } else {
            xmlFatalErr(ctxt, XML_ERR_STRING_NOT_STARTED, NULL);
        }
    }
    return(version);
}

/**
 * xmlParseEncName:
 * @ctxt:  an XML parser context
 *
 * parse the XML encoding name
 *
 * [81] EncName ::= [A-Za-z] ([A-Za-z0-9._] | '-')*
 *
 * Returns the encoding name value or NULL
 */
xmlChar *
xmlParseEncName(xmlParserCtxtPtr ctxt) {
    xmlChar *buf = NULL;
    int len = 0;
    int size = 10;
    xmlChar cur;

    cur = CUR;
    if (((cur >= 'a') && (cur <= 'z')) ||
        ((cur >= 'A') && (cur <= 'Z'))) {
        buf = (xmlChar *) xmlMallocAtomic(size * sizeof(xmlChar));
        if (buf == NULL) {
            xmlErrMemory(ctxt, NULL);
            return(NULL);
        }

        buf[len++] = cur;
        NEXT;
        cur = CUR;
        while (((cur >= 'a') && (cur <= 'z')) ||
               ((cur >= 'A') && (cur <= 'Z')) ||
               ((cur >= '0') && (cur <= '9')) ||
               (cur == '.') || (cur == '_') ||
               (cur == '-')) {
            if (len + 1 >= size) {
                xmlChar *tmp;

                size *= 2;
                tmp = (xmlChar *) xmlRealloc(buf, size * sizeof(xmlChar));
                if (tmp == NULL) {
                    xmlErrMemory(ctxt, NULL);
                    xmlFree(buf);
                    return(NULL);
                }
                buf = tmp;
            }
            buf[len++] = cur;
            NEXT;
            cur = CUR;
            if (cur == 0) {
                SHRINK;
                GROW;
                cur = CUR;
            }
        }
        buf[len] = 0;
    } else {
        xmlFatalErr(ctxt, XML_ERR_ENCODING_NAME, NULL);
    }
    return(buf);
}

/**
 * xmlParseEncodingDecl:
 * @ctxt:  an XML parser context
 * 
 * parse the XML encoding declaration
 *
 * [80] EncodingDecl ::= S 'encoding' Eq ('"' EncName '"' |  "'" EncName "'")
 *
 * this setups the conversion filters.
 *
 * Returns the encoding value or NULL
 */

const xmlChar *
xmlParseEncodingDecl(xmlParserCtxtPtr ctxt) {
    xmlChar *encoding = NULL;

    SKIP_BLANKS;
    if (CMP8(CUR_PTR, 'e', 'n', 'c', 'o', 'd', 'i', 'n', 'g')) {
        SKIP(8);
        SKIP_BLANKS;
        if (RAW != '=') {
            xmlFatalErr(ctxt, XML_ERR_EQUAL_REQUIRED, NULL);
            return(NULL);
        }
        NEXT;
        SKIP_BLANKS;
        if (RAW == '"') {
            NEXT;
            encoding = xmlParseEncName(ctxt);
            if (RAW != '"') {
                xmlFatalErr(ctxt, XML_ERR_STRING_NOT_CLOSED, NULL);
            } else
                NEXT;
        } else if (RAW == '\''){
            NEXT;
            encoding = xmlParseEncName(ctxt);
            if (RAW != '\'') {
                xmlFatalErr(ctxt, XML_ERR_STRING_NOT_CLOSED, NULL);
            } else
                NEXT;
        } else {
            xmlFatalErr(ctxt, XML_ERR_STRING_NOT_STARTED, NULL);
        }
        /*
         * UTF-16 encoding stwich has already taken place at this stage,
         * more over the little-endian/big-endian selection is already done
         */
        if ((encoding != NULL) &&
            ((!xmlStrcasecmp(encoding, BAD_CAST "UTF-16")) ||
             (!xmlStrcasecmp(encoding, BAD_CAST "UTF16")))) {
            /*
             * If no encoding was passed to the parser, that we are
             * using UTF-16 and no decoder is present i.e. the 
             * document is apparently UTF-8 compatible, then raise an
             * encoding mismatch fatal error
             */
            if ((ctxt->encoding == NULL) &&
                (ctxt->input->buf != NULL) &&
                (ctxt->input->buf->encoder == NULL)) {
                xmlFatalErrMsg(ctxt, XML_ERR_INVALID_ENCODING,
                  "Document labelled UTF-16 but has UTF-8 content\n");
            }
            if (ctxt->encoding != NULL)
                xmlFree((xmlChar *) ctxt->encoding);
            ctxt->encoding = encoding;
        }
        /*
         * UTF-8 encoding is handled natively
         */
        else if ((encoding != NULL) &&
            ((!xmlStrcasecmp(encoding, BAD_CAST "UTF-8")) ||
             (!xmlStrcasecmp(encoding, BAD_CAST "UTF8")))) {
            if (ctxt->encoding != NULL)
                xmlFree((xmlChar *) ctxt->encoding);
            ctxt->encoding = encoding;
        }
        else if (encoding != NULL) {
            xmlCharEncodingHandlerPtr handler;

            if (ctxt->input->encoding != NULL)
                xmlFree((xmlChar *) ctxt->input->encoding);
            ctxt->input->encoding = encoding;

            handler = xmlFindCharEncodingHandler((const char *) encoding);
            if (handler != NULL) {
                xmlSwitchToEncoding(ctxt, handler);
            } else {
                xmlFatalErrMsgStr(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
                        "Unsupported encoding %s\n", encoding);
                return(NULL);
            }
        }
    }
    return(encoding);
}

/**
 * xmlParseSDDecl:
 * @ctxt:  an XML parser context
 *
 * parse the XML standalone declaration
 *
 * [32] SDDecl ::= S 'standalone' Eq
 *                 (("'" ('yes' | 'no') "'") | ('"' ('yes' | 'no')'"')) 
 *
 * [ VC: Standalone Document Declaration ]
 * TODO The standalone document declaration must have the value "no"
 * if any external markup declarations contain declarations of:
 *  - attributes with default values, if elements to which these
 *    attributes apply appear in the document without specifications
 *    of values for these attributes, or
 *  - entities (other than amp, lt, gt, apos, quot), if references
 *    to those entities appear in the document, or
 *  - attributes with values subject to normalization, where the
 *    attribute appears in the document with a value which will change
 *    as a result of normalization, or
 *  - element types with element content, if white space occurs directly
 *    within any instance of those types.
 *
 * Returns:
 *   1 if standalone="yes"
 *   0 if standalone="no"
 *  -2 if standalone attribute is missing or invalid
 *        (A standalone value of -2 means that the XML declaration was found,
 *         but no value was specified for the standalone attribute).
 */

int
xmlParseSDDecl(xmlParserCtxtPtr ctxt) {
    int standalone = -2;

    SKIP_BLANKS;
    if (CMP10(CUR_PTR, 's', 't', 'a', 'n', 'd', 'a', 'l', 'o', 'n', 'e')) {
        SKIP(10);
        SKIP_BLANKS;
        if (RAW != '=') {
            xmlFatalErr(ctxt, XML_ERR_EQUAL_REQUIRED, NULL);
            return(standalone);
        }
        NEXT;
        SKIP_BLANKS;
        if (RAW == '\''){
            NEXT;
            if ((RAW == 'n') && (NXT(1) == 'o')) {
                standalone = 0;
                SKIP(2);
            } else if ((RAW == 'y') && (NXT(1) == 'e') &&
                       (NXT(2) == 's')) {
                standalone = 1;
                SKIP(3);
            } else {
                xmlFatalErr(ctxt, XML_ERR_STANDALONE_VALUE, NULL);
            }
            if (RAW != '\'') {
                xmlFatalErr(ctxt, XML_ERR_STRING_NOT_CLOSED, NULL);
            } else
                NEXT;
        } else if (RAW == '"'){
            NEXT;
            if ((RAW == 'n') && (NXT(1) == 'o')) {
                standalone = 0;
                SKIP(2);
            } else if ((RAW == 'y') && (NXT(1) == 'e') &&
                       (NXT(2) == 's')) {
                standalone = 1;
                SKIP(3);
            } else {
                xmlFatalErr(ctxt, XML_ERR_STANDALONE_VALUE, NULL);
            }
            if (RAW != '"') {
                xmlFatalErr(ctxt, XML_ERR_STRING_NOT_CLOSED, NULL);
            } else
                NEXT;
        } else {
            xmlFatalErr(ctxt, XML_ERR_STRING_NOT_STARTED, NULL);
        }
    }
    return(standalone);
}

/**
 * xmlParseXMLDecl:
 * @ctxt:  an XML parser context
 * 
 * parse an XML declaration header
 *
 * [23] XMLDecl ::= '<?xml' VersionInfo EncodingDecl? SDDecl? S? '?>'
 */

void
xmlParseXMLDecl(xmlParserCtxtPtr ctxt) {
    xmlChar *version;

    /*
     * This value for standalone indicates that the document has an
     * XML declaration but it does not have a standalone attribute.
     * It will be overwritten later if a standalone attribute is found.
     */
    ctxt->input->standalone = -2;

    /*
     * We know that '<?xml' is here.
     */
    SKIP(5);

    if (!IS_BLANK_CH(RAW)) {
        xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED,
                       "Blank needed after '<?xml'\n");
    }
    SKIP_BLANKS;

    /*
     * We must have the VersionInfo here.
     */
    version = xmlParseVersionInfo(ctxt);
    if (version == NULL) {
        xmlFatalErr(ctxt, XML_ERR_VERSION_MISSING, NULL);
    } else {
        if (!xmlStrEqual(version, (const xmlChar *) XML_DEFAULT_VERSION)) {
            /*
             * Changed here for XML-1.0 5th edition
             */
            if (ctxt->options & XML_PARSE_OLD10) {
                xmlFatalErrMsgStr(ctxt, XML_ERR_UNKNOWN_VERSION,
                                  "Unsupported version '%s'\n",
                                  version);
            } else {
                if ((version[0] == '1') && ((version[1] == '.'))) {
                    xmlWarningMsg(ctxt, XML_WAR_UNKNOWN_VERSION,
                                  "Unsupported version '%s'\n",
                                  version, NULL);
                } else {
                    xmlFatalErrMsgStr(ctxt, XML_ERR_UNKNOWN_VERSION,
                                      "Unsupported version '%s'\n",
                                      version);
                }
            }
        }
        if (ctxt->version != NULL)
            xmlFree((void *) ctxt->version);
        ctxt->version = version;
    }

    /*
     * We may have the encoding declaration
     */
    if (!IS_BLANK_CH(RAW)) {
        if ((RAW == '?') && (NXT(1) == '>')) {
            SKIP(2);
            return;
        }
        xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED, "Blank needed here\n");
    }
    xmlParseEncodingDecl(ctxt);
    if (ctxt->errNo == XML_ERR_UNSUPPORTED_ENCODING) {
        /*
         * The XML REC instructs us to stop parsing right here
         */
        return;
    }

    /*
     * We may have the standalone status.
     */
    if ((ctxt->input->encoding != NULL) && (!IS_BLANK_CH(RAW))) {
        if ((RAW == '?') && (NXT(1) == '>')) {
            SKIP(2);
            return;
        }
        xmlFatalErrMsg(ctxt, XML_ERR_SPACE_REQUIRED, "Blank needed here\n");
    }

    /*
     * We can grow the input buffer freely at that point
     */
    GROW;

    SKIP_BLANKS;
    ctxt->input->standalone = xmlParseSDDecl(ctxt);

    SKIP_BLANKS;
    if ((RAW == '?') && (NXT(1) == '>')) {
        SKIP(2);
    } else if (RAW == '>') {
        /* Deprecated old WD ... */
        xmlFatalErr(ctxt, XML_ERR_XMLDECL_NOT_FINISHED, NULL);
        NEXT;
    } else {
        xmlFatalErr(ctxt, XML_ERR_XMLDECL_NOT_FINISHED, NULL);
        MOVETO_ENDTAG(CUR_PTR);
        NEXT;
    }
}

/**
 * xmlParseMisc:
 * @ctxt:  an XML parser context
 * 
 * parse an XML Misc* optional field.
 *
 * [27] Misc ::= Comment | PI |  S
 */

void
xmlParseMisc(xmlParserCtxtPtr ctxt) {
    while ((ctxt->instate != XML_PARSER_EOF) &&
           (((RAW == '<') && (NXT(1) == '?')) ||
            (CMP4(CUR_PTR, '<', '!', '-', '-')) ||
            IS_BLANK_CH(CUR))) {
        if ((RAW == '<') && (NXT(1) == '?')) {
            xmlParsePI(ctxt);
        } else if (IS_BLANK_CH(CUR)) {
            NEXT;
        } else
            xmlParseComment(ctxt);
    }
}

/**
 * xmlParseDocument:
 * @ctxt:  an XML parser context
 * 
 * parse an XML document (and build a tree if using the standard SAX
 * interface).
 *
 * [1] document ::= prolog element Misc*
 *
 * [22] prolog ::= XMLDecl? Misc* (doctypedecl Misc*)?
 *
 * Returns 0, -1 in case of error. the parser context is augmented
 *                as a result of the parsing.
 */

int
xmlParseDocument(xmlParserCtxtPtr ctxt) {
    xmlChar start[4];
    xmlCharEncoding enc;

    xmlInitParser();

    if ((ctxt == NULL) || (ctxt->input == NULL))
        return(-1);

    GROW;

    /*
     * SAX: detecting the level.
     */
    xmlDetectSAX2(ctxt);

    /*
     * SAX: beginning of the document processing.
     */
    if ((ctxt->sax) && (ctxt->sax->setDocumentLocator))
        ctxt->sax->setDocumentLocator(ctxt->userData, &xmlDefaultSAXLocator);
    if (ctxt->instate == XML_PARSER_EOF)
        return(-1);

    if ((ctxt->encoding == (const xmlChar *)XML_CHAR_ENCODING_NONE) &&
        ((ctxt->input->end - ctxt->input->cur) >= 4)) {
        /* 
         * Get the 4 first bytes and decode the charset
         * if enc != XML_CHAR_ENCODING_NONE
         * plug some encoding conversion routines.
         */
        start[0] = RAW;
        start[1] = NXT(1);
        start[2] = NXT(2);
        start[3] = NXT(3);
        enc = xmlDetectCharEncoding(&start[0], 4);
        if (enc != XML_CHAR_ENCODING_NONE) {
            xmlSwitchEncoding(ctxt, enc);
        }
    }


    if (CUR == 0) {
        xmlFatalErr(ctxt, XML_ERR_DOCUMENT_EMPTY, NULL);
    }

    /*
     * Check for the XMLDecl in the Prolog.
     * do not GROW here to avoid the detected encoder to decode more
     * than just the first line, unless the amount of data is really
     * too small to hold "<?xml version="1.0" encoding="foo"
     */
    if ((ctxt->input->end - ctxt->input->cur) < 35) {
       GROW;
    }
    if ((CMP5(CUR_PTR, '<', '?', 'x', 'm', 'l')) && (IS_BLANK_CH(NXT(5)))) {

        /*
         * Note that we will switch encoding on the fly.
         */
        xmlParseXMLDecl(ctxt);
        if (ctxt->errNo == XML_ERR_UNSUPPORTED_ENCODING) {
            /*
             * The XML REC instructs us to stop parsing right here
             */
            return(-1);
        }
        ctxt->standalone = ctxt->input->standalone;
        SKIP_BLANKS;
    } else {
        ctxt->version = xmlCharStrdup(XML_DEFAULT_VERSION);
    }
    if ((ctxt->sax) && (ctxt->sax->startDocument) && (!ctxt->disableSAX))
        ctxt->sax->startDocument(ctxt->userData);
    if (ctxt->instate == XML_PARSER_EOF)
        return(-1);

    /*
     * The Misc part of the Prolog
     */
    GROW;
    xmlParseMisc(ctxt);

    /*
     * Then possibly doc type declaration(s) and more Misc
     * (doctypedecl Misc*)?
     */
    GROW;
    if (CMP9(CUR_PTR, '<', '!', 'D', 'O', 'C', 'T', 'Y', 'P', 'E')) {

        ctxt->inSubset = 1;
        xmlParseDocTypeDecl(ctxt);
        if (RAW == '[') {
            ctxt->instate = XML_PARSER_DTD;
            xmlParseInternalSubset(ctxt);
            if (ctxt->instate == XML_PARSER_EOF)
                return(-1);
        }

        /*
         * Create and update the external subset.
         */
        ctxt->inSubset = 2;
        if ((ctxt->sax != NULL) && (ctxt->sax->externalSubset != NULL) &&
            (!ctxt->disableSAX))
            ctxt->sax->externalSubset(ctxt->userData, ctxt->intSubName,
                                      ctxt->extSubSystem, ctxt->extSubURI);
        if (ctxt->instate == XML_PARSER_EOF)
            return(-1);
        ctxt->inSubset = 0;

        xmlCleanSpecialAttr(ctxt);

        ctxt->instate = XML_PARSER_PROLOG;
        xmlParseMisc(ctxt);
    }

    /*
     * Time to start parsing the tree itself
     */
    GROW;
    if (RAW != '<') {
        xmlFatalErrMsg(ctxt, XML_ERR_DOCUMENT_EMPTY,
                       "Start tag expected, '<' not found\n");
    } else {
        ctxt->instate = XML_PARSER_CONTENT;
        xmlParseElement(ctxt);
        ctxt->instate = XML_PARSER_EPILOG;


        /*
         * The Misc part at the end
         */
        xmlParseMisc(ctxt);

        if (RAW != 0) {
            xmlFatalErr(ctxt, XML_ERR_DOCUMENT_END, NULL);
        }
        ctxt->instate = XML_PARSER_EOF;
    }

    /*
     * SAX: end of the document processing.
     */
    if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
        ctxt->sax->endDocument(ctxt->userData);

    /*
     * Remove locally kept entity definitions if the tree was not built
     */
    if ((ctxt->myDoc != NULL) &&
        (xmlStrEqual(ctxt->myDoc->version, SAX_COMPAT_MODE))) {
        xmlFreeDoc(ctxt->myDoc);
        ctxt->myDoc = NULL;
    }

    if ((ctxt->wellFormed) && (ctxt->myDoc != NULL)) {
        ctxt->myDoc->properties |= XML_DOC_WELLFORMED;
        if (ctxt->valid)
            ctxt->myDoc->properties |= XML_DOC_DTDVALID;
        if (ctxt->nsWellFormed)
            ctxt->myDoc->properties |= XML_DOC_NSVALID;
        if (ctxt->options & XML_PARSE_OLD10)
            ctxt->myDoc->properties |= XML_DOC_OLD10;
    }
    if (! ctxt->wellFormed) {
        ctxt->valid = 0;
        return(-1);
    }
    return(0);
}

/**
 * xmlParseExtParsedEnt:
 * @ctxt:  an XML parser context
 * 
 * parse a general parsed entity
 * An external general parsed entity is well-formed if it matches the
 * production labeled extParsedEnt.
 *
 * [78] extParsedEnt ::= TextDecl? content
 *
 * Returns 0, -1 in case of error. the parser context is augmented
 *                as a result of the parsing.
 */

int
xmlParseExtParsedEnt(xmlParserCtxtPtr ctxt) {
    xmlChar start[4];
    xmlCharEncoding enc;

    if ((ctxt == NULL) || (ctxt->input == NULL))
        return(-1);

    xmlDefaultSAXHandlerInit();

    xmlDetectSAX2(ctxt);

    GROW;

    /*
     * SAX: beginning of the document processing.
     */
    if ((ctxt->sax) && (ctxt->sax->setDocumentLocator))
        ctxt->sax->setDocumentLocator(ctxt->userData, &xmlDefaultSAXLocator);

    /* 
     * Get the 4 first bytes and decode the charset
     * if enc != XML_CHAR_ENCODING_NONE
     * plug some encoding conversion routines.
     */
    if ((ctxt->input->end - ctxt->input->cur) >= 4) {
        start[0] = RAW;
        start[1] = NXT(1);
        start[2] = NXT(2);
        start[3] = NXT(3);
        enc = xmlDetectCharEncoding(start, 4);
        if (enc != XML_CHAR_ENCODING_NONE) {
            xmlSwitchEncoding(ctxt, enc);
        }
    }


    if (CUR == 0) {
        xmlFatalErr(ctxt, XML_ERR_DOCUMENT_EMPTY, NULL);
    }

    /*
     * Check for the XMLDecl in the Prolog.
     */
    GROW;
    if ((CMP5(CUR_PTR, '<', '?', 'x', 'm', 'l')) && (IS_BLANK_CH(NXT(5)))) {

        /*
         * Note that we will switch encoding on the fly.
         */
        xmlParseXMLDecl(ctxt);
        if (ctxt->errNo == XML_ERR_UNSUPPORTED_ENCODING) {
            /*
             * The XML REC instructs us to stop parsing right here
             */
            return(-1);
        }
        SKIP_BLANKS;
    } else {
        ctxt->version = xmlCharStrdup(XML_DEFAULT_VERSION);
    }
    if ((ctxt->sax) && (ctxt->sax->startDocument) && (!ctxt->disableSAX))
        ctxt->sax->startDocument(ctxt->userData);
    if (ctxt->instate == XML_PARSER_EOF)
        return(-1);

    /*
     * Doing validity checking on chunk doesn't make sense
     */
    ctxt->instate = XML_PARSER_CONTENT;
    ctxt->validate = 0;
    ctxt->loadsubset = 0;
    ctxt->depth = 0;

    xmlParseContent(ctxt);
    if (ctxt->instate == XML_PARSER_EOF)
        return(-1);
   
    if ((RAW == '<') && (NXT(1) == '/')) {
        xmlFatalErr(ctxt, XML_ERR_NOT_WELL_BALANCED, NULL);
    } else if (RAW != 0) {
        xmlFatalErr(ctxt, XML_ERR_EXTRA_CONTENT, NULL);
    }

    /*
     * SAX: end of the document processing.
     */
    if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
        ctxt->sax->endDocument(ctxt->userData);

    if (! ctxt->wellFormed) return(-1);
    return(0);
}

#ifdef LIBXML_PUSH_ENABLED
/************************************************************************
 *                                                                      *
 *              Progressive parsing interfaces                          *
 *                                                                      *
 ************************************************************************/

/**
 * xmlParseLookupSequence:
 * @ctxt:  an XML parser context
 * @first:  the first char to lookup
 * @next:  the next char to lookup or zero
 * @third:  the next char to lookup or zero
 *
 * Try to find if a sequence (first, next, third) or  just (first next) or
 * (first) is available in the input stream.
 * This function has a side effect of (possibly) incrementing ctxt->checkIndex
 * to avoid rescanning sequences of bytes, it DOES change the state of the
 * parser, do not use liberally.
 *
 * Returns the index to the current parsing point if the full sequence
 *      is available, -1 otherwise.
 */
static int
xmlParseLookupSequence(xmlParserCtxtPtr ctxt, xmlChar first,
                       xmlChar next, xmlChar third) {
    int base, len;
    xmlParserInputPtr in;
    const xmlChar *buf;

    in = ctxt->input;
    if (in == NULL) return(-1);
    base = in->cur - in->base;
    if (base < 0) return(-1);
    if (ctxt->checkIndex > base)
        base = ctxt->checkIndex;
    if (in->buf == NULL) {
        buf = in->base;
        len = in->length;
    } else {
        buf = in->buf->buffer->content;
        len = in->buf->buffer->use;
    }
    /* take into account the sequence length */
    if (third) len -= 2;
    else if (next) len --;
    for (;base < len;base++) {
        if (buf[base] == first) {
            if (third != 0) {
                if ((buf[base + 1] != next) ||
                    (buf[base + 2] != third)) continue;
            } else if (next != 0) {
                if (buf[base + 1] != next) continue;
            }
            ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
            if (next == 0)
                xmlGenericError(xmlGenericErrorContext,
                        "PP: lookup '%c' found at %d\n",
                        first, base);
            else if (third == 0)
                xmlGenericError(xmlGenericErrorContext,
                        "PP: lookup '%c%c' found at %d\n",
                        first, next, base);
            else 
                xmlGenericError(xmlGenericErrorContext,
                        "PP: lookup '%c%c%c' found at %d\n",
                        first, next, third, base);
#endif
            return(base - (in->cur - in->base));
        }
    }
    ctxt->checkIndex = base;
#ifdef DEBUG_PUSH
    if (next == 0)
        xmlGenericError(xmlGenericErrorContext,
                "PP: lookup '%c' failed\n", first);
    else if (third == 0)
        xmlGenericError(xmlGenericErrorContext,
                "PP: lookup '%c%c' failed\n", first, next);
    else        
        xmlGenericError(xmlGenericErrorContext,
                "PP: lookup '%c%c%c' failed\n", first, next, third);
#endif
    return(-1);
}

/**
 * xmlParseGetLasts:
 * @ctxt:  an XML parser context
 * @lastlt:  pointer to store the last '<' from the input
 * @lastgt:  pointer to store the last '>' from the input
 *
 * Lookup the last < and > in the current chunk
 */
static void
xmlParseGetLasts(xmlParserCtxtPtr ctxt, const xmlChar **lastlt,
                 const xmlChar **lastgt) {
    const xmlChar *tmp;

    if ((ctxt == NULL) || (lastlt == NULL) || (lastgt == NULL)) {
        xmlGenericError(xmlGenericErrorContext,
                    "Internal error: xmlParseGetLasts\n");
        return;
    }
    if ((ctxt->progressive != 0) && (ctxt->inputNr == 1)) {
        tmp = ctxt->input->end;
        tmp--;
        while ((tmp >= ctxt->input->base) && (*tmp != '<')) tmp--;
        if (tmp < ctxt->input->base) {
            *lastlt = NULL;
            *lastgt = NULL;
        } else {
            *lastlt = tmp;
            tmp++;
            while ((tmp < ctxt->input->end) && (*tmp != '>')) {
                if (*tmp == '\'') {
                    tmp++;
                    while ((tmp < ctxt->input->end) && (*tmp != '\'')) tmp++;
                    if (tmp < ctxt->input->end) tmp++;
                } else if (*tmp == '"') {
                    tmp++;
                    while ((tmp < ctxt->input->end) && (*tmp != '"')) tmp++;
                    if (tmp < ctxt->input->end) tmp++;
                } else
                    tmp++;
            }
            if (tmp < ctxt->input->end)
                *lastgt = tmp;
            else {
                tmp = *lastlt;
                tmp--;
                while ((tmp >= ctxt->input->base) && (*tmp != '>')) tmp--;
                if (tmp >= ctxt->input->base)
                    *lastgt = tmp;
                else
                    *lastgt = NULL;
            }
        }
    } else {
        *lastlt = NULL;
        *lastgt = NULL;
    }
}
/**
 * xmlCheckCdataPush:
 * @cur: pointer to the bock of characters
 * @len: length of the block in bytes
 *
 * Check that the block of characters is okay as SCdata content [20]
 *
 * Returns the number of bytes to pass if okay, a negative index where an
 *         UTF-8 error occured otherwise
 */
static int
xmlCheckCdataPush(const xmlChar *utf, int len) {
    int ix;
    unsigned char c;
    int codepoint;

    if ((utf == NULL) || (len <= 0))
        return(0);
    
    for (ix = 0; ix < len;) {      /* string is 0-terminated */
        c = utf[ix];
        if ((c & 0x80) == 0x00) {       /* 1-byte code, starts with 10 */
            if (c >= 0x20)
                ix++;
            else if ((c == 0xA) || (c == 0xD) || (c == 0x9))
                ix++;
            else
                return(-ix);
        } else if ((c & 0xe0) == 0xc0) {/* 2-byte code, starts with 110 */
            if (ix + 2 > len) return(ix);
            if ((utf[ix+1] & 0xc0 ) != 0x80)
                return(-ix);
            codepoint = (utf[ix] & 0x1f) << 6;
            codepoint |= utf[ix+1] & 0x3f;
            if (!xmlIsCharQ(codepoint))
                return(-ix);
            ix += 2;
        } else if ((c & 0xf0) == 0xe0) {/* 3-byte code, starts with 1110 */
            if (ix + 3 > len) return(ix);
            if (((utf[ix+1] & 0xc0) != 0x80) ||
                ((utf[ix+2] & 0xc0) != 0x80))
                    return(-ix);
            codepoint = (utf[ix] & 0xf) << 12;
            codepoint |= (utf[ix+1] & 0x3f) << 6;
            codepoint |= utf[ix+2] & 0x3f;
            if (!xmlIsCharQ(codepoint))
                return(-ix);
            ix += 3;
        } else if ((c & 0xf8) == 0xf0) {/* 4-byte code, starts with 11110 */
            if (ix + 4 > len) return(ix);
            if (((utf[ix+1] & 0xc0) != 0x80) ||
                ((utf[ix+2] & 0xc0) != 0x80) ||
                ((utf[ix+3] & 0xc0) != 0x80))
                    return(-ix);
            codepoint = (utf[ix] & 0x7) << 18;
            codepoint |= (utf[ix+1] & 0x3f) << 12;
            codepoint |= (utf[ix+2] & 0x3f) << 6;
            codepoint |= utf[ix+3] & 0x3f;
            if (!xmlIsCharQ(codepoint))
                return(-ix);
            ix += 4;
        } else                          /* unknown encoding */
            return(-ix);
      }
      return(ix);
}

/**
 * xmlParseTryOrFinish:
 * @ctxt:  an XML parser context
 * @terminate:  last chunk indicator
 *
 * Try to progress on parsing
 *
 * Returns zero if no parsing was possible
 */
static int
xmlParseTryOrFinish(xmlParserCtxtPtr ctxt, int terminate) {
    int ret = 0;
    int avail, tlen;
    xmlChar cur, next;
    const xmlChar *lastlt, *lastgt;

    if (ctxt->input == NULL)
        return(0);

#ifdef DEBUG_PUSH
    switch (ctxt->instate) {
        case XML_PARSER_EOF:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try EOF\n"); break;
        case XML_PARSER_START:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try START\n"); break;
        case XML_PARSER_MISC:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try MISC\n");break;
        case XML_PARSER_COMMENT:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try COMMENT\n");break;
        case XML_PARSER_PROLOG:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try PROLOG\n");break;
        case XML_PARSER_START_TAG:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try START_TAG\n");break;
        case XML_PARSER_CONTENT:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try CONTENT\n");break;
        case XML_PARSER_CDATA_SECTION:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try CDATA_SECTION\n");break;
        case XML_PARSER_END_TAG:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try END_TAG\n");break;
        case XML_PARSER_ENTITY_DECL:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try ENTITY_DECL\n");break;
        case XML_PARSER_ENTITY_VALUE:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try ENTITY_VALUE\n");break;
        case XML_PARSER_ATTRIBUTE_VALUE:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try ATTRIBUTE_VALUE\n");break;
        case XML_PARSER_DTD:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try DTD\n");break;
        case XML_PARSER_EPILOG:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try EPILOG\n");break;
        case XML_PARSER_PI:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try PI\n");break;
        case XML_PARSER_IGNORE:
            xmlGenericError(xmlGenericErrorContext,
                    "PP: try IGNORE\n");break;
    }
#endif

    if ((ctxt->input != NULL) &&
        (ctxt->input->cur - ctxt->input->base > 4096)) {
        xmlSHRINK(ctxt);
        ctxt->checkIndex = 0;
    }
    xmlParseGetLasts(ctxt, &lastlt, &lastgt);

    while (ctxt->instate != XML_PARSER_EOF) {
        if ((ctxt->errNo != XML_ERR_OK) && (ctxt->disableSAX == 1))
            return(0);

        
        /*
         * Pop-up of finished entities.
         */
        while ((RAW == 0) && (ctxt->inputNr > 1))
            xmlPopInput(ctxt);

        if (ctxt->input == NULL) break;
        if (ctxt->input->buf == NULL)
            avail = ctxt->input->length -
                    (ctxt->input->cur - ctxt->input->base);
        else {
            /*
             * If we are operating on converted input, try to flush
             * remainng chars to avoid them stalling in the non-converted
             * buffer.
             */
            if ((ctxt->input->buf->raw != NULL) &&
                (ctxt->input->buf->raw->use > 0)) {
                int base = ctxt->input->base -
                           ctxt->input->buf->buffer->content;
                int current = ctxt->input->cur - ctxt->input->base;

                xmlParserInputBufferPush(ctxt->input->buf, 0, "");
                ctxt->input->base = ctxt->input->buf->buffer->content + base;
                ctxt->input->cur = ctxt->input->base + current;
                ctxt->input->end =
                    &ctxt->input->buf->buffer->content[
                                       ctxt->input->buf->buffer->use];
            }
            avail = ctxt->input->buf->buffer->use -
                    (ctxt->input->cur - ctxt->input->base);
        }
        if (avail < 1)
            goto done;
        switch (ctxt->instate) {
            case XML_PARSER_EOF:
                /*
                 * Document parsing is done !
                 */
                goto done;
            case XML_PARSER_START:
                if (ctxt->charset == XML_CHAR_ENCODING_NONE) {
                    xmlChar start[4];
                    xmlCharEncoding enc;

                    /*
                     * Very first chars read from the document flow.
                     */
                    if (avail < 4)
                        goto done;

                    /* 
                     * Get the 4 first bytes and decode the charset
                     * if enc != XML_CHAR_ENCODING_NONE
                     * plug some encoding conversion routines,
                     * else xmlSwitchEncoding will set to (default)
                     * UTF8.
                     */
                    start[0] = RAW;
                    start[1] = NXT(1);
                    start[2] = NXT(2);
                    start[3] = NXT(3);
                    enc = xmlDetectCharEncoding(start, 4);
                    xmlSwitchEncoding(ctxt, enc);
                    break;
                }

                if (avail < 2)
                    goto done;
                cur = ctxt->input->cur[0];
                next = ctxt->input->cur[1];
                if (cur == 0) {
                    if ((ctxt->sax) && (ctxt->sax->setDocumentLocator))
                        ctxt->sax->setDocumentLocator(ctxt->userData,
                                                      &xmlDefaultSAXLocator);
                    xmlFatalErr(ctxt, XML_ERR_DOCUMENT_EMPTY, NULL);
                    ctxt->instate = XML_PARSER_EOF;
#ifdef DEBUG_PUSH
                    xmlGenericError(xmlGenericErrorContext,
                            "PP: entering EOF\n");
#endif
                    if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
                        ctxt->sax->endDocument(ctxt->userData);
                    goto done;
                }
                if ((cur == '<') && (next == '?')) {
                    /* PI or XML decl */
                    if (avail < 5) return(ret);
                    if ((!terminate) &&
                        (xmlParseLookupSequence(ctxt, '?', '>', 0) < 0))
                        return(ret);
                    if ((ctxt->sax) && (ctxt->sax->setDocumentLocator))
                        ctxt->sax->setDocumentLocator(ctxt->userData,
                                                      &xmlDefaultSAXLocator);
                    if ((ctxt->input->cur[2] == 'x') &&
                        (ctxt->input->cur[3] == 'm') &&
                        (ctxt->input->cur[4] == 'l') &&
                        (IS_BLANK_CH(ctxt->input->cur[5]))) {
                        ret += 5;
#ifdef DEBUG_PUSH
                        xmlGenericError(xmlGenericErrorContext,
                                "PP: Parsing XML Decl\n");
#endif
                        xmlParseXMLDecl(ctxt);
                        if (ctxt->errNo == XML_ERR_UNSUPPORTED_ENCODING) {
                            /*
                             * The XML REC instructs us to stop parsing right
                             * here
                             */
                            ctxt->instate = XML_PARSER_EOF;
                            return(0);
                        }
                        ctxt->standalone = ctxt->input->standalone;
                        if ((ctxt->encoding == NULL) &&
                            (ctxt->input->encoding != NULL))
                            ctxt->encoding = xmlStrdup(ctxt->input->encoding);
                        if ((ctxt->sax) && (ctxt->sax->startDocument) &&
                            (!ctxt->disableSAX))
                            ctxt->sax->startDocument(ctxt->userData);
                        ctxt->instate = XML_PARSER_MISC;
#ifdef DEBUG_PUSH
                        xmlGenericError(xmlGenericErrorContext,
                                "PP: entering MISC\n");
#endif
                    } else {
                        ctxt->version = xmlCharStrdup(XML_DEFAULT_VERSION);
                        if ((ctxt->sax) && (ctxt->sax->startDocument) &&
                            (!ctxt->disableSAX))
                            ctxt->sax->startDocument(ctxt->userData);
                        ctxt->instate = XML_PARSER_MISC;
#ifdef DEBUG_PUSH
                        xmlGenericError(xmlGenericErrorContext,
                                "PP: entering MISC\n");
#endif
                    }
                } else {
                    if ((ctxt->sax) && (ctxt->sax->setDocumentLocator))
                        ctxt->sax->setDocumentLocator(ctxt->userData,
                                                      &xmlDefaultSAXLocator);
                    ctxt->version = xmlCharStrdup(XML_DEFAULT_VERSION);
                    if (ctxt->version == NULL) {
                        xmlErrMemory(ctxt, NULL);
                        break;
                    }
                    if ((ctxt->sax) && (ctxt->sax->startDocument) &&
                        (!ctxt->disableSAX))
                        ctxt->sax->startDocument(ctxt->userData);
                    ctxt->instate = XML_PARSER_MISC;
#ifdef DEBUG_PUSH
                    xmlGenericError(xmlGenericErrorContext,
                            "PP: entering MISC\n");
#endif
                }
                break;
            case XML_PARSER_START_TAG: {
                const xmlChar *name;
                const xmlChar *prefix = NULL;
                const xmlChar *URI = NULL;
                int nsNr = ctxt->nsNr;

                if ((avail < 2) && (ctxt->inputNr == 1))
                    goto done;
                cur = ctxt->input->cur[0];
                if (cur != '<') {
                    xmlFatalErr(ctxt, XML_ERR_DOCUMENT_EMPTY, NULL);
                    ctxt->instate = XML_PARSER_EOF;
                    if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
                        ctxt->sax->endDocument(ctxt->userData);
                    goto done;
                }
                if (!terminate) {
                    if (ctxt->progressive) {
                        /* > can be found unescaped in attribute values */
                        if ((lastgt == NULL) || (ctxt->input->cur >= lastgt))
                            goto done;
                    } else if (xmlParseLookupSequence(ctxt, '>', 0, 0) < 0) {
                        goto done;
                    }
                }
                if (ctxt->spaceNr == 0)
                    spacePush(ctxt, -1);
                else if (*ctxt->space == -2)
                    spacePush(ctxt, -1);
                else
                    spacePush(ctxt, *ctxt->space);
#ifdef LIBXML_SAX1_ENABLED
                if (ctxt->sax2)
#endif /* LIBXML_SAX1_ENABLED */
                    name = xmlParseStartTag2(ctxt, &prefix, &URI, &tlen);
#ifdef LIBXML_SAX1_ENABLED
                else
                    name = xmlParseStartTag(ctxt);
#endif /* LIBXML_SAX1_ENABLED */
                if (ctxt->instate == XML_PARSER_EOF)
                    goto done;
                if (name == NULL) {
                    spacePop(ctxt);
                    ctxt->instate = XML_PARSER_EOF;
                    if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
                        ctxt->sax->endDocument(ctxt->userData);
                    goto done;
                }
#ifdef LIBXML_VALID_ENABLED
                /*
                 * [ VC: Root Element Type ]
                 * The Name in the document type declaration must match
                 * the element type of the root element. 
                 */
                if (ctxt->validate && ctxt->wellFormed && ctxt->myDoc &&
                    ctxt->node && (ctxt->node == ctxt->myDoc->children))
                    ctxt->valid &= xmlValidateRoot(&ctxt->vctxt, ctxt->myDoc);
#endif /* LIBXML_VALID_ENABLED */

                /*
                 * Check for an Empty Element.
                 */
                if ((RAW == '/') && (NXT(1) == '>')) {
                    SKIP(2);

                    if (ctxt->sax2) {
                        if ((ctxt->sax != NULL) &&
                            (ctxt->sax->endElementNs != NULL) &&
                            (!ctxt->disableSAX))
                            ctxt->sax->endElementNs(ctxt->userData, name,
                                                    prefix, URI);
                        if (ctxt->nsNr - nsNr > 0)
                            nsPop(ctxt, ctxt->nsNr - nsNr);
#ifdef LIBXML_SAX1_ENABLED
                    } else {
                        if ((ctxt->sax != NULL) &&
                            (ctxt->sax->endElement != NULL) &&
                            (!ctxt->disableSAX))
                            ctxt->sax->endElement(ctxt->userData, name);
#endif /* LIBXML_SAX1_ENABLED */
                    }
                    if (ctxt->instate == XML_PARSER_EOF)
                        goto done;
                    spacePop(ctxt);
                    if (ctxt->nameNr == 0) {
                        ctxt->instate = XML_PARSER_EPILOG;
                    } else {
                        ctxt->instate = XML_PARSER_CONTENT;
                    }
                    break;
                }
                if (RAW == '>') {
                    NEXT;
                } else {
                    xmlFatalErrMsgStr(ctxt, XML_ERR_GT_REQUIRED,
                                         "Couldn't find end of Start Tag %s\n",
                                         name);
                    nodePop(ctxt);
                    spacePop(ctxt);
                }
                if (ctxt->sax2)
                    nameNsPush(ctxt, name, prefix, URI, ctxt->nsNr - nsNr);
#ifdef LIBXML_SAX1_ENABLED
                else
                    namePush(ctxt, name);
#endif /* LIBXML_SAX1_ENABLED */

                ctxt->instate = XML_PARSER_CONTENT;
                break;
            }
            case XML_PARSER_CONTENT: {
                const xmlChar *test;
                unsigned int cons;
                if ((avail < 2) && (ctxt->inputNr == 1))
                    goto done;
                cur = ctxt->input->cur[0];
                next = ctxt->input->cur[1];

                test = CUR_PTR;
                cons = ctxt->input->consumed;
                if ((cur == '<') && (next == '/')) {
                    ctxt->instate = XML_PARSER_END_TAG;
                    break;
                } else if ((cur == '<') && (next == '?')) {
                    if ((!terminate) &&
                        (xmlParseLookupSequence(ctxt, '?', '>', 0) < 0))
                        goto done;
                    xmlParsePI(ctxt);
                } else if ((cur == '<') && (next != '!')) {
                    ctxt->instate = XML_PARSER_START_TAG;
                    break;
                } else if ((cur == '<') && (next == '!') &&
                           (ctxt->input->cur[2] == '-') &&
                           (ctxt->input->cur[3] == '-')) {
                    int term;

                    if (avail < 4)
                        goto done;
                    ctxt->input->cur += 4;
                    term = xmlParseLookupSequence(ctxt, '-', '-', '>');
                    ctxt->input->cur -= 4;
                    if ((!terminate) && (term < 0))
                        goto done;
                    xmlParseComment(ctxt);
                    ctxt->instate = XML_PARSER_CONTENT;
                } else if ((cur == '<') && (ctxt->input->cur[1] == '!') &&
                    (ctxt->input->cur[2] == '[') &&
                    (ctxt->input->cur[3] == 'C') &&
                    (ctxt->input->cur[4] == 'D') &&
                    (ctxt->input->cur[5] == 'A') &&
                    (ctxt->input->cur[6] == 'T') &&
                    (ctxt->input->cur[7] == 'A') &&
                    (ctxt->input->cur[8] == '[')) {
                    SKIP(9);
                    ctxt->instate = XML_PARSER_CDATA_SECTION;
                    break;
                } else if ((cur == '<') && (next == '!') &&
                           (avail < 9)) {
                    goto done;
                } else if (cur == '&') {
                    if ((!terminate) &&
                        (xmlParseLookupSequence(ctxt, ';', 0, 0) < 0))
                        goto done;
                    xmlParseReference(ctxt);
                } else {
                    /* TODO Avoid the extra copy, handle directly !!! */
                    /*
                     * Goal of the following test is:
                     *  - minimize calls to the SAX 'character' callback
                     *    when they are mergeable
                     *  - handle an problem for isBlank when we only parse
                     *    a sequence of blank chars and the next one is
                     *    not available to check against '<' presence.
                     *  - tries to homogenize the differences in SAX
                     *    callbacks between the push and pull versions
                     *    of the parser.
                     */
                    if ((ctxt->inputNr == 1) &&
                        (avail < XML_PARSER_BIG_BUFFER_SIZE)) {
                        if (!terminate) {
                            if (ctxt->progressive) {
                                if ((lastlt == NULL) ||
                                    (ctxt->input->cur > lastlt))
                                    goto done;
                            } else if (xmlParseLookupSequence(ctxt,
                                                              '<', 0, 0) < 0) {
                                goto done;
                            }
                        }
                    }
                    ctxt->checkIndex = 0;
                    xmlParseCharData(ctxt, 0);
                }
                /*
                 * Pop-up of finished entities.
                 */
                while ((RAW == 0) && (ctxt->inputNr > 1))
                    xmlPopInput(ctxt);
                if ((cons == ctxt->input->consumed) && (test == CUR_PTR)) {
                    xmlFatalErr(ctxt, XML_ERR_INTERNAL_ERROR,
                                "detected an error in element content\n");
                    ctxt->instate = XML_PARSER_EOF;
                    break;
                }
                break;
            }
            case XML_PARSER_END_TAG:
                if (avail < 2)
                    goto done;
                if (!terminate) {
                    if (ctxt->progressive) {
                        /* > can be found unescaped in attribute values */
                        if ((lastgt == NULL) || (ctxt->input->cur >= lastgt))
                            goto done;
                    } else if (xmlParseLookupSequence(ctxt, '>', 0, 0) < 0) {
                        goto done;
                    }
                }
                if (ctxt->sax2) {
                    xmlParseEndTag2(ctxt,
                           (void *) ctxt->pushTab[ctxt->nameNr * 3 - 3],
                           (void *) ctxt->pushTab[ctxt->nameNr * 3 - 2], 0,
                       (int) (long) ctxt->pushTab[ctxt->nameNr * 3 - 1], 0);
                    nameNsPop(ctxt);
                }
#ifdef LIBXML_SAX1_ENABLED
                  else
                    xmlParseEndTag1(ctxt, 0);
#endif /* LIBXML_SAX1_ENABLED */
                if (ctxt->instate == XML_PARSER_EOF) {
                    /* Nothing */
                } else if (ctxt->nameNr == 0) {
                    ctxt->instate = XML_PARSER_EPILOG;
                } else {
                    ctxt->instate = XML_PARSER_CONTENT;
                }
                break;
            case XML_PARSER_CDATA_SECTION: {
                /*
                 * The Push mode need to have the SAX callback for 
                 * cdataBlock merge back contiguous callbacks.
                 */
                int base;

                base = xmlParseLookupSequence(ctxt, ']', ']', '>');
                if (base < 0) {
                    if (avail >= XML_PARSER_BIG_BUFFER_SIZE + 2) {
                        int tmp;

                        tmp = xmlCheckCdataPush(ctxt->input->cur, 
                                                XML_PARSER_BIG_BUFFER_SIZE);
                        if (tmp < 0) {
                            tmp = -tmp;
                            ctxt->input->cur += tmp;
                            goto encoding_error;
                        }
                        if ((ctxt->sax != NULL) && (!ctxt->disableSAX)) {
                            if (ctxt->sax->cdataBlock != NULL)
                                ctxt->sax->cdataBlock(ctxt->userData,
                                                      ctxt->input->cur, tmp);
                            else if (ctxt->sax->characters != NULL)
                                ctxt->sax->characters(ctxt->userData,
                                                      ctxt->input->cur, tmp);
                        }
                        if (ctxt->instate == XML_PARSER_EOF)
                            goto done;
                        SKIPL(tmp);
                        ctxt->checkIndex = 0;
                    }
                    goto done;
                } else {
                    int tmp;

                    tmp = xmlCheckCdataPush(ctxt->input->cur, base);
                    if ((tmp < 0) || (tmp != base)) {
                        tmp = -tmp;
                        ctxt->input->cur += tmp;
                        goto encoding_error;
                    }
                    if ((ctxt->sax != NULL) && (base == 0) &&
                        (ctxt->sax->cdataBlock != NULL) &&
                        (!ctxt->disableSAX)) {
                        /*
                         * Special case to provide identical behaviour
                         * between pull and push parsers on enpty CDATA
                         * sections
                         */
                         if ((ctxt->input->cur - ctxt->input->base >= 9) &&
                             (!strncmp((const char *)&ctxt->input->cur[-9],
                                       "<![CDATA[", 9)))
                             ctxt->sax->cdataBlock(ctxt->userData,
                                                   BAD_CAST "", 0);
                    } else if ((ctxt->sax != NULL) && (base > 0) &&
                        (!ctxt->disableSAX)) {
                        if (ctxt->sax->cdataBlock != NULL)
                            ctxt->sax->cdataBlock(ctxt->userData,
                                                  ctxt->input->cur, base);
                        else if (ctxt->sax->characters != NULL)
                            ctxt->sax->characters(ctxt->userData,
                                                  ctxt->input->cur, base);
                    }
                    if (ctxt->instate == XML_PARSER_EOF)
                        goto done;
                    SKIPL(base + 3);
                    ctxt->checkIndex = 0;
                    ctxt->instate = XML_PARSER_CONTENT;
#ifdef DEBUG_PUSH
                    xmlGenericError(xmlGenericErrorContext,
                            "PP: entering CONTENT\n");
#endif
                }
                break;
            }
            case XML_PARSER_MISC:
                SKIP_BLANKS;
                if (ctxt->input->buf == NULL)
                    avail = ctxt->input->length -
                            (ctxt->input->cur - ctxt->input->base);
                else
                    avail = ctxt->input->buf->buffer->use -
                            (ctxt->input->cur - ctxt->input->base);
                if (avail < 2)
                    goto done;
                cur = ctxt->input->cur[0];
                next = ctxt->input->cur[1];
                if ((cur == '<') && (next == '?')) {
                    if ((!terminate) &&
                        (xmlParseLookupSequence(ctxt, '?', '>', 0) < 0))
                        goto done;
#ifdef DEBUG_PUSH
                    xmlGenericError(xmlGenericErrorContext,
                            "PP: Parsing PI\n");
#endif
                    xmlParsePI(ctxt);
                    if (ctxt->instate == XML_PARSER_EOF)
                        goto done;
                    ctxt->checkIndex = 0;
                } else if ((cur == '<') && (next == '!') &&
                    (ctxt->input->cur[2] == '-') &&
                    (ctxt->input->cur[3] == '-')) {
                    if ((!terminate) &&
                        (xmlParseLookupSequence(ctxt, '-', '-', '>') < 0))
                        goto done;
#ifdef DEBUG_PUSH
                    xmlGenericError(xmlGenericErrorContext,
                            "PP: Parsing Comment\n");
#endif
                    xmlParseComment(ctxt);
                    if (ctxt->instate == XML_PARSER_EOF)
                        goto done;
                    ctxt->instate = XML_PARSER_MISC;
                    ctxt->checkIndex = 0;
                } else if ((cur == '<') && (next == '!') &&
                    (ctxt->input->cur[2] == 'D') &&
                    (ctxt->input->cur[3] == 'O') &&
                    (ctxt->input->cur[4] == 'C') &&
                    (ctxt->input->cur[5] == 'T') &&
                    (ctxt->input->cur[6] == 'Y') &&
                    (ctxt->input->cur[7] == 'P') &&
                    (ctxt->input->cur[8] == 'E')) {
                    if ((!terminate) &&
                        (xmlParseLookupSequence(ctxt, '>', 0, 0) < 0))
                        goto done;
#ifdef DEBUG_PUSH
                    xmlGenericError(xmlGenericErrorContext,
                            "PP: Parsing internal subset\n");
#endif
                    ctxt->inSubset = 1;
                    xmlParseDocTypeDecl(ctxt);
                    if (ctxt->instate == XML_PARSER_EOF)
                        goto done;
                    if (RAW == '[') {
                        ctxt->instate = XML_PARSER_DTD;
#ifdef DEBUG_PUSH
                        xmlGenericError(xmlGenericErrorContext,
                                "PP: entering DTD\n");
#endif
                    } else {
                        /*
                         * Create and update the external subset.
                         */
                        ctxt->inSubset = 2;
                        if ((ctxt->sax != NULL) && (!ctxt->disableSAX) &&
                            (ctxt->sax->externalSubset != NULL))
                            ctxt->sax->externalSubset(ctxt->userData,
                                    ctxt->intSubName, ctxt->extSubSystem,
                                    ctxt->extSubURI);
                        ctxt->inSubset = 0;
                        xmlCleanSpecialAttr(ctxt);
                        ctxt->instate = XML_PARSER_PROLOG;
#ifdef DEBUG_PUSH
                        xmlGenericError(xmlGenericErrorContext,
                                "PP: entering PROLOG\n");
#endif
                    }
                } else if ((cur == '<') && (next == '!') &&
                           (avail < 9)) {
                    goto done;
                } else {
                    ctxt->instate = XML_PARSER_START_TAG;
                    ctxt->progressive = 1;
                    xmlParseGetLasts(ctxt, &lastlt, &lastgt);
#ifdef DEBUG_PUSH
                    xmlGenericError(xmlGenericErrorContext,
                            "PP: entering START_TAG\n");
#endif
                }
                break;
            case XML_PARSER_PROLOG:
                SKIP_BLANKS;
                if (ctxt->input->buf == NULL)
                    avail = ctxt->input->length - (ctxt->input->cur - ctxt->input->base);
                else
                    avail = ctxt->input->buf->buffer->use - (ctxt->input->cur - ctxt->input->base);
                if (avail < 2) 
                    goto done;
                cur = ctxt->input->cur[0];
                next = ctxt->input->cur[1];
                if ((cur == '<') && (next == '?')) {
                    if ((!terminate) &&
                        (xmlParseLookupSequence(ctxt, '?', '>', 0) < 0))
                        goto done;
#ifdef DEBUG_PUSH
                    xmlGenericError(xmlGenericErrorContext,
                            "PP: Parsing PI\n");
#endif
                    xmlParsePI(ctxt);
                    if (ctxt->instate == XML_PARSER_EOF)
                        goto done;
                } else if ((cur == '<') && (next == '!') &&
                    (ctxt->input->cur[2] == '-') && (ctxt->input->cur[3] == '-')) {
                    if ((!terminate) &&
                        (xmlParseLookupSequence(ctxt, '-', '-', '>') < 0))
                        goto done;
#ifdef DEBUG_PUSH
                    xmlGenericError(xmlGenericErrorContext,
                            "PP: Parsing Comment\n");
#endif
                    xmlParseComment(ctxt);
                    if (ctxt->instate == XML_PARSER_EOF)
                        goto done;
                    ctxt->instate = XML_PARSER_PROLOG;
                } else if ((cur == '<') && (next == '!') &&
                           (avail < 4)) {
                    goto done;
                } else {
                    ctxt->instate = XML_PARSER_START_TAG;
                    if (ctxt->progressive == 0)
                        ctxt->progressive = 1;
                    xmlParseGetLasts(ctxt, &lastlt, &lastgt);
#ifdef DEBUG_PUSH
                    xmlGenericError(xmlGenericErrorContext,
                            "PP: entering START_TAG\n");
#endif
                }
                break;
            case XML_PARSER_EPILOG:
                SKIP_BLANKS;
                if (ctxt->input->buf == NULL)
                    avail = ctxt->input->length - (ctxt->input->cur - ctxt->input->base);
                else
                    avail = ctxt->input->buf->buffer->use - (ctxt->input->cur - ctxt->input->base);
                if (avail < 2)
                    goto done;
                cur = ctxt->input->cur[0];
                next = ctxt->input->cur[1];
                if ((cur == '<') && (next == '?')) {
                    if ((!terminate) &&
                        (xmlParseLookupSequence(ctxt, '?', '>', 0) < 0))
                        goto done;
#ifdef DEBUG_PUSH
                    xmlGenericError(xmlGenericErrorContext,
                            "PP: Parsing PI\n");
#endif
                    xmlParsePI(ctxt);
                    if (ctxt->instate == XML_PARSER_EOF)
                        goto done;
                    ctxt->instate = XML_PARSER_EPILOG;
                } else if ((cur == '<') && (next == '!') &&
                    (ctxt->input->cur[2] == '-') && (ctxt->input->cur[3] == '-')) {
                    if ((!terminate) &&
                        (xmlParseLookupSequence(ctxt, '-', '-', '>') < 0))
                        goto done;
#ifdef DEBUG_PUSH
                    xmlGenericError(xmlGenericErrorContext,
                            "PP: Parsing Comment\n");
#endif
                    xmlParseComment(ctxt);
                    if (ctxt->instate == XML_PARSER_EOF)
                        goto done;
                    ctxt->instate = XML_PARSER_EPILOG;
                } else if ((cur == '<') && (next == '!') &&
                           (avail < 4)) {
                    goto done;
                } else {
                    xmlFatalErr(ctxt, XML_ERR_DOCUMENT_END, NULL);
                    ctxt->instate = XML_PARSER_EOF;
#ifdef DEBUG_PUSH
                    xmlGenericError(xmlGenericErrorContext,
                            "PP: entering EOF\n");
#endif
                    if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
                        ctxt->sax->endDocument(ctxt->userData);
                    goto done;
                }
                break;
            case XML_PARSER_DTD: {
                /*
                 * Sorry but progressive parsing of the internal subset
                 * is not expected to be supported. We first check that
                 * the full content of the internal subset is available and
                 * the parsing is launched only at that point.
                 * Internal subset ends up with "']' S? '>'" in an unescaped
                 * section and not in a ']]>' sequence which are conditional
                 * sections (whoever argued to keep that crap in XML deserve
                 * a place in hell !).
                 */
                int base, i;
                xmlChar *buf;
                xmlChar quote = 0;

                base = ctxt->input->cur - ctxt->input->base;
                if (base < 0) return(0);
                if (ctxt->checkIndex > base)
                    base = ctxt->checkIndex;
                buf = ctxt->input->buf->buffer->content;
                for (;(unsigned int) base < ctxt->input->buf->buffer->use;
                     base++) {
                    if (quote != 0) {
                        if (buf[base] == quote)
                            quote = 0;
                        continue;    
                    }
                    if ((quote == 0) && (buf[base] == '<')) {
                        int found  = 0;
                        /* special handling of comments */
                        if (((unsigned int) base + 4 <
                             ctxt->input->buf->buffer->use) &&
                            (buf[base + 1] == '!') &&
                            (buf[base + 2] == '-') &&
                            (buf[base + 3] == '-')) {
                            for (;(unsigned int) base + 3 <
                                  ctxt->input->buf->buffer->use; base++) {
                                if ((buf[base] == '-') &&
                                    (buf[base + 1] == '-') &&
                                    (buf[base + 2] == '>')) {
                                    found = 1;
                                    base += 2;
                                    break;
                                }
                            }
                            if (!found) {
#if 0
                                fprintf(stderr, "unfinished comment\n");
#endif
                                break; /* for */
                            }
                            continue;
                        }
                    }
                    if (buf[base] == '"') {
                        quote = '"';
                        continue;
                    }
                    if (buf[base] == '\'') {
                        quote = '\'';
                        continue;
                    }
                    if (buf[base] == ']') {
#if 0
                        fprintf(stderr, "%c%c%c%c: ", buf[base],
                                buf[base + 1], buf[base + 2], buf[base + 3]);
#endif
                        if ((unsigned int) base +1 >=
                            ctxt->input->buf->buffer->use)
                            break;
                        if (buf[base + 1] == ']') {
                            /* conditional crap, skip both ']' ! */
                            base++;
                            continue;
                        }
                        for (i = 1;
                     (unsigned int) base + i < ctxt->input->buf->buffer->use;
                             i++) {
                            if (buf[base + i] == '>') {
#if 0
                                fprintf(stderr, "found\n");
#endif
                                goto found_end_int_subset;
                            }
                            if (!IS_BLANK_CH(buf[base + i])) {
#if 0
                                fprintf(stderr, "not found\n");
#endif
                                goto not_end_of_int_subset;
                            }
                        }
#if 0
                        fprintf(stderr, "end of stream\n");
#endif
                        break;
                        
                    }
not_end_of_int_subset:
                    continue; /* for */
                }
                /*
                 * We didn't found the end of the Internal subset
                 */
#ifdef DEBUG_PUSH
                if (next == 0)
                    xmlGenericError(xmlGenericErrorContext,
                            "PP: lookup of int subset end filed\n");
#endif
                goto done;

found_end_int_subset:
                xmlParseInternalSubset(ctxt);
                if (ctxt->instate == XML_PARSER_EOF)
                    goto done;
                ctxt->inSubset = 2;
                if ((ctxt->sax != NULL) && (!ctxt->disableSAX) &&
                    (ctxt->sax->externalSubset != NULL))
                    ctxt->sax->externalSubset(ctxt->userData, ctxt->intSubName,
                            ctxt->extSubSystem, ctxt->extSubURI);
                ctxt->inSubset = 0;
                xmlCleanSpecialAttr(ctxt);
                if (ctxt->instate == XML_PARSER_EOF)
                    goto done;
                ctxt->instate = XML_PARSER_PROLOG;
                ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
                xmlGenericError(xmlGenericErrorContext,
                        "PP: entering PROLOG\n");
#endif
                break;
            }
            case XML_PARSER_COMMENT:
                xmlGenericError(xmlGenericErrorContext,
                        "PP: internal error, state == COMMENT\n");
                ctxt->instate = XML_PARSER_CONTENT;
#ifdef DEBUG_PUSH
                xmlGenericError(xmlGenericErrorContext,
                        "PP: entering CONTENT\n");
#endif
                break;
            case XML_PARSER_IGNORE:
                xmlGenericError(xmlGenericErrorContext,
                        "PP: internal error, state == IGNORE");
                ctxt->instate = XML_PARSER_DTD;
#ifdef DEBUG_PUSH
                xmlGenericError(xmlGenericErrorContext,
                        "PP: entering DTD\n");
#endif
                break;
            case XML_PARSER_PI:
                xmlGenericError(xmlGenericErrorContext,
                        "PP: internal error, state == PI\n");
                ctxt->instate = XML_PARSER_CONTENT;
#ifdef DEBUG_PUSH
                xmlGenericError(xmlGenericErrorContext,
                        "PP: entering CONTENT\n");
#endif
                break;
            case XML_PARSER_ENTITY_DECL:
                xmlGenericError(xmlGenericErrorContext,
                        "PP: internal error, state == ENTITY_DECL\n");
                ctxt->instate = XML_PARSER_DTD;
#ifdef DEBUG_PUSH
                xmlGenericError(xmlGenericErrorContext,
                        "PP: entering DTD\n");
#endif
                break;
            case XML_PARSER_ENTITY_VALUE:
                xmlGenericError(xmlGenericErrorContext,
                        "PP: internal error, state == ENTITY_VALUE\n");
                ctxt->instate = XML_PARSER_CONTENT;
#ifdef DEBUG_PUSH
                xmlGenericError(xmlGenericErrorContext,
                        "PP: entering DTD\n");
#endif
                break;
            case XML_PARSER_ATTRIBUTE_VALUE:
                xmlGenericError(xmlGenericErrorContext,
                        "PP: internal error, state == ATTRIBUTE_VALUE\n");
                ctxt->instate = XML_PARSER_START_TAG;
#ifdef DEBUG_PUSH
                xmlGenericError(xmlGenericErrorContext,
                        "PP: entering START_TAG\n");
#endif
                break;
            case XML_PARSER_SYSTEM_LITERAL:
                xmlGenericError(xmlGenericErrorContext,
                        "PP: internal error, state == SYSTEM_LITERAL\n");
                ctxt->instate = XML_PARSER_START_TAG;
#ifdef DEBUG_PUSH
                xmlGenericError(xmlGenericErrorContext,
                        "PP: entering START_TAG\n");
#endif
                break;
            case XML_PARSER_PUBLIC_LITERAL:
                xmlGenericError(xmlGenericErrorContext,
                        "PP: internal error, state == PUBLIC_LITERAL\n");
                ctxt->instate = XML_PARSER_START_TAG;
#ifdef DEBUG_PUSH
                xmlGenericError(xmlGenericErrorContext,
                        "PP: entering START_TAG\n");
#endif
                break;
        }
    }
done:    
#ifdef DEBUG_PUSH
    xmlGenericError(xmlGenericErrorContext, "PP: done %d\n", ret);
#endif
    return(ret);
encoding_error:
    {
        char buffer[150];

        snprintf(buffer, 149, "Bytes: 0x%02X 0x%02X 0x%02X 0x%02X\n",
                        ctxt->input->cur[0], ctxt->input->cur[1],
                        ctxt->input->cur[2], ctxt->input->cur[3]);
        __xmlErrEncoding(ctxt, XML_ERR_INVALID_CHAR,
                     "Input is not proper UTF-8, indicate encoding !\n%s",
                     BAD_CAST buffer, NULL);
    }
    return(0);
}

/**
 * xmlParseChunk:
 * @ctxt:  an XML parser context
 * @chunk:  an char array
 * @size:  the size in byte of the chunk
 * @terminate:  last chunk indicator
 *
 * Parse a Chunk of memory
 *
 * Returns zero if no error, the xmlParserErrors otherwise.
 */
int
xmlParseChunk(xmlParserCtxtPtr ctxt, const char *chunk, int size,
              int terminate) {
    int end_in_lf = 0;
    int remain = 0;

    if (ctxt == NULL)
        return(XML_ERR_INTERNAL_ERROR);
    if ((ctxt->errNo != XML_ERR_OK) && (ctxt->disableSAX == 1))
        return(ctxt->errNo);
    if (ctxt->instate == XML_PARSER_EOF)
        return(-1);
    if (ctxt->instate == XML_PARSER_START)
        xmlDetectSAX2(ctxt);
    if ((size > 0) && (chunk != NULL) && (!terminate) &&
        (chunk[size - 1] == '\r')) {
        end_in_lf = 1;
        size--;
    }

xmldecl_done:

    if ((size > 0) && (chunk != NULL) && (ctxt->input != NULL) &&
        (ctxt->input->buf != NULL) && (ctxt->instate != XML_PARSER_EOF))  {
        int base = ctxt->input->base - ctxt->input->buf->buffer->content;
        int cur = ctxt->input->cur - ctxt->input->base;
        int res;

        /*
         * Specific handling if we autodetected an encoding, we should not
         * push more than the first line ... which depend on the encoding
         * And only push the rest once the final encoding was detected
         */
        if ((ctxt->instate == XML_PARSER_START) && (ctxt->input != NULL) &&
            (ctxt->input->buf != NULL) && (ctxt->input->buf->encoder != NULL)) {
            unsigned int len = 45;

            if ((xmlStrcasestr(BAD_CAST ctxt->input->buf->encoder->name,
                               BAD_CAST "UTF-16")) ||
                (xmlStrcasestr(BAD_CAST ctxt->input->buf->encoder->name,
                               BAD_CAST "UTF16")))
                len = 90;
            else if ((xmlStrcasestr(BAD_CAST ctxt->input->buf->encoder->name,
                                    BAD_CAST "UCS-4")) ||
                     (xmlStrcasestr(BAD_CAST ctxt->input->buf->encoder->name,
                                    BAD_CAST "UCS4")))
                len = 180;

            if (ctxt->input->buf->rawconsumed < len)
                len -= ctxt->input->buf->rawconsumed;

            /*
             * Change size for reading the initial declaration only
             * if size is greater than len. Otherwise, memmove in xmlBufferAdd
             * will blindly copy extra bytes from memory.
             */
            if (size > len) {
                remain = size - len;
                size = len;
            } else {
                remain = 0;
            }
        }
        res =xmlParserInputBufferPush(ctxt->input->buf, size, chunk);
        if (res < 0) {
            ctxt->errNo = XML_PARSER_EOF;
            ctxt->disableSAX = 1;
            return (XML_PARSER_EOF);
        }
        ctxt->input->base = ctxt->input->buf->buffer->content + base;
        ctxt->input->cur = ctxt->input->base + cur;
        ctxt->input->end =
            &ctxt->input->buf->buffer->content[ctxt->input->buf->buffer->use];
#ifdef DEBUG_PUSH
        xmlGenericError(xmlGenericErrorContext, "PP: pushed %d\n", size);
#endif

    } else if (ctxt->instate != XML_PARSER_EOF) {
        if ((ctxt->input != NULL) && ctxt->input->buf != NULL) {
            xmlParserInputBufferPtr in = ctxt->input->buf;
            if ((in->encoder != NULL) && (in->buffer != NULL) &&
                    (in->raw != NULL)) {
                int nbchars;

                nbchars = xmlCharEncInFunc(in->encoder, in->buffer, in->raw);
                if (nbchars < 0) {
                    /* TODO 2.6.0 */
                    xmlGenericError(xmlGenericErrorContext,
                                    "xmlParseChunk: encoder error\n");
                    return(XML_ERR_INVALID_ENCODING);
                }
            }
        }
    }
    if (remain != 0)
        xmlParseTryOrFinish(ctxt, 0);
    else
        xmlParseTryOrFinish(ctxt, terminate);
    if (ctxt->instate == XML_PARSER_EOF)
        return(ctxt->errNo);
    if ((ctxt->errNo != XML_ERR_OK) && (ctxt->disableSAX == 1))
        return(ctxt->errNo);

    if (remain != 0) {
        chunk += size;
        size = remain;
        remain = 0;
        goto xmldecl_done;
    }
    if ((end_in_lf == 1) && (ctxt->input != NULL) &&
        (ctxt->input->buf != NULL)) {
        xmlParserInputBufferPush(ctxt->input->buf, 1, "\r");
    }
    if (terminate) {
        /*
         * Check for termination
         */
        int avail = 0;

        if (ctxt->input != NULL) {
            if (ctxt->input->buf == NULL)
                avail = ctxt->input->length -
                        (ctxt->input->cur - ctxt->input->base);
            else
                avail = ctxt->input->buf->buffer->use -
                        (ctxt->input->cur - ctxt->input->base);
        }
                            
        if ((ctxt->instate != XML_PARSER_EOF) &&
            (ctxt->instate != XML_PARSER_EPILOG)) {
            xmlFatalErr(ctxt, XML_ERR_DOCUMENT_END, NULL);
        } 
        if ((ctxt->instate == XML_PARSER_EPILOG) && (avail > 0)) {
            xmlFatalErr(ctxt, XML_ERR_DOCUMENT_END, NULL);
        }
        if (ctxt->instate != XML_PARSER_EOF) {
            if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
                ctxt->sax->endDocument(ctxt->userData);
        }
        ctxt->instate = XML_PARSER_EOF;
    }
    return((xmlParserErrors) ctxt->errNo);            
}

/************************************************************************
 *                                                                      *
 *              I/O front end functions to the parser                   *
 *                                                                      *
 ************************************************************************/

/**
 * xmlCreatePushParserCtxt:
 * @sax:  a SAX handler
 * @user_data:  The user data returned on SAX callbacks
 * @chunk:  a pointer to an array of chars
 * @size:  number of chars in the array
 * @filename:  an optional file name or URI
 *
 * Create a parser context for using the XML parser in push mode.
 * If @buffer and @size are non-NULL, the data is used to detect
 * the encoding.  The remaining characters will be parsed so they
 * don't need to be fed in again through xmlParseChunk.
 * To allow content encoding detection, @size should be >= 4
 * The value of @filename is used for fetching external entities
 * and error/warning reports.
 *
 * Returns the new parser context or NULL
 */

xmlParserCtxtPtr
xmlCreatePushParserCtxt(xmlSAXHandlerPtr sax, void *user_data, 
                        const char *chunk, int size, const char *filename) {
    xmlParserCtxtPtr ctxt;
    xmlParserInputPtr inputStream;
    xmlParserInputBufferPtr buf;
    xmlCharEncoding enc = XML_CHAR_ENCODING_NONE;

    /*
     * plug some encoding conversion routines
     */
    if ((chunk != NULL) && (size >= 4))
        enc = xmlDetectCharEncoding((const xmlChar *) chunk, size);

    buf = xmlAllocParserInputBuffer(enc);
    if (buf == NULL) return(NULL);

    ctxt = xmlNewParserCtxt();
    if (ctxt == NULL) {
        xmlErrMemory(NULL, "creating parser: out of memory\n");
        xmlFreeParserInputBuffer(buf);
        return(NULL);
    }
    ctxt->dictNames = 1;
    ctxt->pushTab = (void **) xmlMalloc(ctxt->nameMax * 3 * sizeof(xmlChar *));
    if (ctxt->pushTab == NULL) {
        xmlErrMemory(ctxt, NULL);
        xmlFreeParserInputBuffer(buf);
        xmlFreeParserCtxt(ctxt);
        return(NULL);
    }
    if (sax != NULL) {
#ifdef LIBXML_SAX1_ENABLED
        if (ctxt->sax != (xmlSAXHandlerPtr) &xmlDefaultSAXHandler)
#endif /* LIBXML_SAX1_ENABLED */
            xmlFree(ctxt->sax);
        ctxt->sax = (xmlSAXHandlerPtr) xmlMalloc(sizeof(xmlSAXHandler));
        if (ctxt->sax == NULL) {
            xmlErrMemory(ctxt, NULL);
            xmlFreeParserInputBuffer(buf);
            xmlFreeParserCtxt(ctxt);
            return(NULL);
        }
        memset(ctxt->sax, 0, sizeof(xmlSAXHandler));
        if (sax->initialized == XML_SAX2_MAGIC)
            memcpy(ctxt->sax, sax, sizeof(xmlSAXHandler));
        else
            memcpy(ctxt->sax, sax, sizeof(xmlSAXHandlerV1));
        if (user_data != NULL)
            ctxt->userData = user_data;
    }   
    if (filename == NULL) {
        ctxt->directory = NULL;
    } else {
        ctxt->directory = xmlParserGetDirectory(filename);
    }

    inputStream = xmlNewInputStream(ctxt);
    if (inputStream == NULL) {
        xmlFreeParserCtxt(ctxt);
        xmlFreeParserInputBuffer(buf);
        return(NULL);
    }

    if (filename == NULL)
        inputStream->filename = NULL;
    else {
        inputStream->filename = (char *)
            xmlCanonicPath((const xmlChar *) filename);
        if (inputStream->filename == NULL) {
            xmlFreeParserCtxt(ctxt);
            xmlFreeParserInputBuffer(buf);
            return(NULL);
        }
    }
    inputStream->buf = buf;
    inputStream->base = inputStream->buf->buffer->content;
    inputStream->cur = inputStream->buf->buffer->content;
    inputStream->end = 
        &inputStream->buf->buffer->content[inputStream->buf->buffer->use];

    inputPush(ctxt, inputStream);

    /*
     * If the caller didn't provide an initial 'chunk' for determining
     * the encoding, we set the context to XML_CHAR_ENCODING_NONE so
     * that it can be automatically determined later
     */
    if ((size == 0) || (chunk == NULL)) {
        ctxt->charset = XML_CHAR_ENCODING_NONE;
    } else if ((ctxt->input != NULL) && (ctxt->input->buf != NULL)) {
        int base = ctxt->input->base - ctxt->input->buf->buffer->content;
        int cur = ctxt->input->cur - ctxt->input->base;

        xmlParserInputBufferPush(ctxt->input->buf, size, chunk);              

        ctxt->input->base = ctxt->input->buf->buffer->content + base;
        ctxt->input->cur = ctxt->input->base + cur;
        ctxt->input->end =
            &ctxt->input->buf->buffer->content[ctxt->input->buf->buffer->use];
#ifdef DEBUG_PUSH
        xmlGenericError(xmlGenericErrorContext, "PP: pushed %d\n", size);
#endif
    }

    if (enc != XML_CHAR_ENCODING_NONE) {
        xmlSwitchEncoding(ctxt, enc);
    }

    return(ctxt);
}
#endif /* LIBXML_PUSH_ENABLED */

/**
 * xmlStopParser:
 * @ctxt:  an XML parser context
 *
 * Blocks further parser processing
 */
void           
xmlStopParser(xmlParserCtxtPtr ctxt) {
    if (ctxt == NULL)
        return;
    ctxt->instate = XML_PARSER_EOF;
    ctxt->errNo = XML_ERR_USER_STOP;
    ctxt->disableSAX = 1;
    if (ctxt->input != NULL) {
        ctxt->input->cur = BAD_CAST"";
        ctxt->input->base = ctxt->input->cur;
    }
}

/**
 * xmlCreateIOParserCtxt:
 * @sax:  a SAX handler
 * @user_data:  The user data returned on SAX callbacks
 * @ioread:  an I/O read function
 * @ioclose:  an I/O close function
 * @ioctx:  an I/O handler
 * @enc:  the charset encoding if known
 *
 * Create a parser context for using the XML parser with an existing
 * I/O stream
 *
 * Returns the new parser context or NULL
 */
xmlParserCtxtPtr
xmlCreateIOParserCtxt(xmlSAXHandlerPtr sax, void *user_data,
        xmlInputReadCallback   ioread, xmlInputCloseCallback  ioclose,
        void *ioctx, xmlCharEncoding enc) {
    xmlParserCtxtPtr ctxt;
    xmlParserInputPtr inputStream;
    xmlParserInputBufferPtr buf;
    
    if (ioread == NULL) return(NULL);

    buf = xmlParserInputBufferCreateIO(ioread, ioclose, ioctx, enc);
    if (buf == NULL) return(NULL);

    ctxt = xmlNewParserCtxt();
    if (ctxt == NULL) {
        xmlFreeParserInputBuffer(buf);
        return(NULL);
    }
    if (sax != NULL) {
#ifdef LIBXML_SAX1_ENABLED
        if (ctxt->sax != (xmlSAXHandlerPtr) &xmlDefaultSAXHandler)
#endif /* LIBXML_SAX1_ENABLED */
            xmlFree(ctxt->sax);
        ctxt->sax = (xmlSAXHandlerPtr) xmlMalloc(sizeof(xmlSAXHandler));
        if (ctxt->sax == NULL) {
            xmlErrMemory(ctxt, NULL);
            xmlFreeParserCtxt(ctxt);
            return(NULL);
        }
        memset(ctxt->sax, 0, sizeof(xmlSAXHandler));
        if (sax->initialized == XML_SAX2_MAGIC)
            memcpy(ctxt->sax, sax, sizeof(xmlSAXHandler));
        else
            memcpy(ctxt->sax, sax, sizeof(xmlSAXHandlerV1));
        if (user_data != NULL)
            ctxt->userData = user_data;
    }   

    inputStream = xmlNewIOInputStream(ctxt, buf, enc);
    if (inputStream == NULL) {
        xmlFreeParserCtxt(ctxt);
        return(NULL);
    }
    inputPush(ctxt, inputStream);

    return(ctxt);
}

#ifdef LIBXML_VALID_ENABLED
/************************************************************************
 *                                                                      *
 *              Front ends when parsing a DTD                           *
 *                                                                      *
 ************************************************************************/

/**
 * xmlIOParseDTD:
 * @sax:  the SAX handler block or NULL
 * @input:  an Input Buffer
 * @enc:  the charset encoding if known
 *
 * Load and parse a DTD
 * 
 * Returns the resulting xmlDtdPtr or NULL in case of error.
 * @input will be freed by the function in any case.
 */

xmlDtdPtr
xmlIOParseDTD(xmlSAXHandlerPtr sax, xmlParserInputBufferPtr input,
              xmlCharEncoding enc) {
    xmlDtdPtr ret = NULL;
    xmlParserCtxtPtr ctxt;
    xmlParserInputPtr pinput = NULL;
    xmlChar start[4];

    if (input == NULL)
        return(NULL);

    ctxt = xmlNewParserCtxt();
    if (ctxt == NULL) {
        xmlFreeParserInputBuffer(input);
        return(NULL);
    }

    /*
     * Set-up the SAX context
     */
    if (sax != NULL) { 
        if (ctxt->sax != NULL)
            xmlFree(ctxt->sax);
        ctxt->sax = sax;
        ctxt->userData = ctxt;
    }
    xmlDetectSAX2(ctxt);

    /*
     * generate a parser input from the I/O handler
     */

    pinput = xmlNewIOInputStream(ctxt, input, XML_CHAR_ENCODING_NONE);
    if (pinput == NULL) {
        if (sax != NULL) ctxt->sax = NULL;
        xmlFreeParserInputBuffer(input);
        xmlFreeParserCtxt(ctxt);
        return(NULL);
    }

    /*
     * plug some encoding conversion routines here.
     */
    if (xmlPushInput(ctxt, pinput) < 0) {
        if (sax != NULL) ctxt->sax = NULL;
        xmlFreeParserCtxt(ctxt);
        return(NULL);
    }
    if (enc != XML_CHAR_ENCODING_NONE) {
        xmlSwitchEncoding(ctxt, enc);
    }

    pinput->filename = NULL;
    pinput->line = 1;
    pinput->col = 1;
    pinput->base = ctxt->input->cur;
    pinput->cur = ctxt->input->cur;
    pinput->free = NULL;

    /*
     * let's parse that entity knowing it's an external subset.
     */
    ctxt->inSubset = 2;
    ctxt->myDoc = xmlNewDoc(BAD_CAST "1.0");
    if (ctxt->myDoc == NULL) {
        xmlErrMemory(ctxt, "New Doc failed");
        return(NULL);
    }
    ctxt->myDoc->properties = XML_DOC_INTERNAL;
    ctxt->myDoc->extSubset = xmlNewDtd(ctxt->myDoc, BAD_CAST "none",
                                       BAD_CAST "none", BAD_CAST "none");

    if ((enc == XML_CHAR_ENCODING_NONE) &&
        ((ctxt->input->end - ctxt->input->cur) >= 4)) {
        /* 
         * Get the 4 first bytes and decode the charset
         * if enc != XML_CHAR_ENCODING_NONE
         * plug some encoding conversion routines.
         */
        start[0] = RAW;
        start[1] = NXT(1);
        start[2] = NXT(2);
        start[3] = NXT(3);
        enc = xmlDetectCharEncoding(start, 4);
        if (enc != XML_CHAR_ENCODING_NONE) {
            xmlSwitchEncoding(ctxt, enc);
        }
    }

    xmlParseExternalSubset(ctxt, BAD_CAST "none", BAD_CAST "none");

    if (ctxt->myDoc != NULL) {
        if (ctxt->wellFormed) {
            ret = ctxt->myDoc->extSubset;
            ctxt->myDoc->extSubset = NULL;
            if (ret != NULL) {
                xmlNodePtr tmp;

                ret->doc = NULL;
                tmp = ret->children;
                while (tmp != NULL) {
                    tmp->doc = NULL;
                    tmp = tmp->next;
                }
            }
        } else {
            ret = NULL;
        }
        xmlFreeDoc(ctxt->myDoc);
        ctxt->myDoc = NULL;
    }
    if (sax != NULL) ctxt->sax = NULL;
    xmlFreeParserCtxt(ctxt);
    
    return(ret);
}

/**
 * xmlSAXParseDTD:
 * @sax:  the SAX handler block
 * @ExternalID:  a NAME* containing the External ID of the DTD
 * @SystemID:  a NAME* containing the URL to the DTD
 *
 * Load and parse an external subset.
 * 
 * Returns the resulting xmlDtdPtr or NULL in case of error.
 */

xmlDtdPtr
xmlSAXParseDTD(xmlSAXHandlerPtr sax, const xmlChar *ExternalID,
                          const xmlChar *SystemID) {
    xmlDtdPtr ret = NULL;
    xmlParserCtxtPtr ctxt;
    xmlParserInputPtr input = NULL;
    xmlCharEncoding enc;
    xmlChar* systemIdCanonic;

    if ((ExternalID == NULL) && (SystemID == NULL)) return(NULL);

    ctxt = xmlNewParserCtxt();
    if (ctxt == NULL) {
        return(NULL);
    }

    /*
     * Set-up the SAX context
     */
    if (sax != NULL) { 
        if (ctxt->sax != NULL)
            xmlFree(ctxt->sax);
        ctxt->sax = sax;
        ctxt->userData = ctxt;
    }
    
    /*
     * Canonicalise the system ID
     */
    systemIdCanonic = xmlCanonicPath(SystemID);
    if ((SystemID != NULL) && (systemIdCanonic == NULL)) {
        xmlFreeParserCtxt(ctxt);
        return(NULL);
    }

    /*
     * Ask the Entity resolver to load the damn thing
     */

    if ((ctxt->sax != NULL) && (ctxt->sax->resolveEntity != NULL))
        input = ctxt->sax->resolveEntity(ctxt->userData, ExternalID,
                                         systemIdCanonic);
    if (input == NULL) {
        if (sax != NULL) ctxt->sax = NULL;
        xmlFreeParserCtxt(ctxt);
        if (systemIdCanonic != NULL)
            xmlFree(systemIdCanonic);
        return(NULL);
    }

    /*
     * plug some encoding conversion routines here.
     */
    if (xmlPushInput(ctxt, input) < 0) {
        if (sax != NULL) ctxt->sax = NULL;
        xmlFreeParserCtxt(ctxt);
        if (systemIdCanonic != NULL)
            xmlFree(systemIdCanonic);
        return(NULL);
    }
    if ((ctxt->input->end - ctxt->input->cur) >= 4) {
        enc = xmlDetectCharEncoding(ctxt->input->cur, 4);
        xmlSwitchEncoding(ctxt, enc);
    }

    if (input->filename == NULL)
        input->filename = (char *) systemIdCanonic;
    else
        xmlFree(systemIdCanonic);
    input->line = 1;
    input->col = 1;
    input->base = ctxt->input->cur;
    input->cur = ctxt->input->cur;
    input->free = NULL;

    /*
     * let's parse that entity knowing it's an external subset.
     */
    ctxt->inSubset = 2;
    ctxt->myDoc = xmlNewDoc(BAD_CAST "1.0");
    if (ctxt->myDoc == NULL) {
        xmlErrMemory(ctxt, "New Doc failed");
        if (sax != NULL) ctxt->sax = NULL;
        xmlFreeParserCtxt(ctxt);
        return(NULL);
    }
    ctxt->myDoc->properties = XML_DOC_INTERNAL;
    ctxt->myDoc->extSubset = xmlNewDtd(ctxt->myDoc, BAD_CAST "none",
                                       ExternalID, SystemID);
    xmlParseExternalSubset(ctxt, ExternalID, SystemID);

    if (ctxt->myDoc != NULL) {
        if (ctxt->wellFormed) {
            ret = ctxt->myDoc->extSubset;
            ctxt->myDoc->extSubset = NULL;
            if (ret != NULL) {
                xmlNodePtr tmp;

                ret->doc = NULL;
                tmp = ret->children;
                while (tmp != NULL) {
                    tmp->doc = NULL;
                    tmp = tmp->next;
                }
            }
        } else {
            ret = NULL;
        }
        xmlFreeDoc(ctxt->myDoc);
        ctxt->myDoc = NULL;
    }
    if (sax != NULL) ctxt->sax = NULL;
    xmlFreeParserCtxt(ctxt);

    return(ret);
}


/**
 * xmlParseDTD:
 * @ExternalID:  a NAME* containing the External ID of the DTD
 * @SystemID:  a NAME* containing the URL to the DTD
 *
 * Load and parse an external subset.
 *
 * Returns the resulting xmlDtdPtr or NULL in case of error.
 */

xmlDtdPtr
xmlParseDTD(const xmlChar *ExternalID, const xmlChar *SystemID) {
    return(xmlSAXParseDTD(NULL, ExternalID, SystemID));
}
#endif /* LIBXML_VALID_ENABLED */

/************************************************************************
 *                                                                      *
 *              Front ends when parsing an Entity                       *
 *                                                                      *
 ************************************************************************/

/**
 * xmlParseCtxtExternalEntity:
 * @ctx:  the existing parsing context
 * @URL:  the URL for the entity to load
 * @ID:  the System ID for the entity to load
 * @lst:  the return value for the set of parsed nodes
 *
 * Parse an external general entity within an existing parsing context
 * An external general parsed entity is well-formed if it matches the
 * production labeled extParsedEnt.
 *
 * [78] extParsedEnt ::= TextDecl? content
 *
 * Returns 0 if the entity is well formed, -1 in case of args problem and
 *    the parser error code otherwise
 */

int
xmlParseCtxtExternalEntity(xmlParserCtxtPtr ctx, const xmlChar *URL,
                       const xmlChar *ID, xmlNodePtr *lst) {
    xmlParserCtxtPtr ctxt;
    xmlDocPtr newDoc;
    xmlNodePtr newRoot;
    xmlSAXHandlerPtr oldsax = NULL;
    int ret = 0;
    xmlChar start[4];
    xmlCharEncoding enc;

    if (ctx == NULL) return(-1);

    if (((ctx->depth > 40) && ((ctx->options & XML_PARSE_HUGE) == 0)) ||
        (ctx->depth > 1024)) {
        return(XML_ERR_ENTITY_LOOP);
    }

    if (lst != NULL)
        *lst = NULL;
    if ((URL == NULL) && (ID == NULL))
        return(-1);
    if (ctx->myDoc == NULL) /* @@ relax but check for dereferences */
        return(-1);

    ctxt = xmlCreateEntityParserCtxtInternal(URL, ID, NULL, ctx);
    if (ctxt == NULL) {
        return(-1);
    }

    oldsax = ctxt->sax;
    ctxt->sax = ctx->sax;
    xmlDetectSAX2(ctxt);
    newDoc = xmlNewDoc(BAD_CAST "1.0");
    if (newDoc == NULL) {
        xmlFreeParserCtxt(ctxt);
        return(-1);
    }
    newDoc->properties = XML_DOC_INTERNAL;
    if (ctx->myDoc->dict) {
        newDoc->dict = ctx->myDoc->dict;
        xmlDictReference(newDoc->dict);
    }
    if (ctx->myDoc != NULL) {
        newDoc->intSubset = ctx->myDoc->intSubset;
        newDoc->extSubset = ctx->myDoc->extSubset;
    }
    if (ctx->myDoc->URL != NULL) {
        newDoc->URL = xmlStrdup(ctx->myDoc->URL);
    }
    newRoot = xmlNewDocNode(newDoc, NULL, BAD_CAST "pseudoroot", NULL);
    if (newRoot == NULL) {
        ctxt->sax = oldsax;
        xmlFreeParserCtxt(ctxt);
        newDoc->intSubset = NULL;
        newDoc->extSubset = NULL;
        xmlFreeDoc(newDoc);
        return(-1);
    }
    xmlAddChild((xmlNodePtr) newDoc, newRoot);
    nodePush(ctxt, newDoc->children);
    if (ctx->myDoc == NULL) {
        ctxt->myDoc = newDoc;
    } else {
        ctxt->myDoc = ctx->myDoc;
        newDoc->children->doc = ctx->myDoc;
    }

    /*
     * Get the 4 first bytes and decode the charset
     * if enc != XML_CHAR_ENCODING_NONE
     * plug some encoding conversion routines.
     */
    GROW
    if ((ctxt->input->end - ctxt->input->cur) >= 4) {
        start[0] = RAW;
        start[1] = NXT(1);
        start[2] = NXT(2);
        start[3] = NXT(3);
        enc = xmlDetectCharEncoding(start, 4);
        if (enc != XML_CHAR_ENCODING_NONE) {
            xmlSwitchEncoding(ctxt, enc);
        }
    }

    /*
     * Parse a possible text declaration first
     */
    if ((CMP5(CUR_PTR, '<', '?', 'x', 'm', 'l')) && (IS_BLANK_CH(NXT(5)))) {
        xmlParseTextDecl(ctxt);
        /*
         * An XML-1.0 document can't reference an entity not XML-1.0
         */
        if ((xmlStrEqual(ctx->version, BAD_CAST "1.0")) &&
            (!xmlStrEqual(ctxt->input->version, BAD_CAST "1.0"))) {
            xmlFatalErrMsg(ctxt, XML_ERR_VERSION_MISMATCH, 
                           "Version mismatch between document and entity\n");
        }
    }

    /*
     * Doing validity checking on chunk doesn't make sense
     */
    ctxt->instate = XML_PARSER_CONTENT;
    ctxt->validate = ctx->validate;
    ctxt->valid = ctx->valid;
    ctxt->loadsubset = ctx->loadsubset;
    ctxt->depth = ctx->depth + 1;
    ctxt->replaceEntities = ctx->replaceEntities;
    if (ctxt->validate) {
        ctxt->vctxt.error = ctx->vctxt.error;
        ctxt->vctxt.warning = ctx->vctxt.warning;
    } else {
        ctxt->vctxt.error = NULL;
        ctxt->vctxt.warning = NULL;
    }
    ctxt->vctxt.nodeTab = NULL;
    ctxt->vctxt.nodeNr = 0;
    ctxt->vctxt.nodeMax = 0;
    ctxt->vctxt.node = NULL;
    if (ctxt->dict != NULL) xmlDictFree(ctxt->dict);
    ctxt->dict = ctx->dict;
    ctxt->str_xml = xmlDictLookup(ctxt->dict, BAD_CAST "xml", 3);
    ctxt->str_xmlns = xmlDictLookup(ctxt->dict, BAD_CAST "xmlns", 5);
    ctxt->str_xml_ns = xmlDictLookup(ctxt->dict, XML_XML_NAMESPACE, 36);
    ctxt->dictNames = ctx->dictNames;
    ctxt->attsDefault = ctx->attsDefault;
    ctxt->attsSpecial = ctx->attsSpecial;
    ctxt->linenumbers = ctx->linenumbers;

    xmlParseContent(ctxt);

    ctx->validate = ctxt->validate;
    ctx->valid = ctxt->valid;
    if ((RAW == '<') && (NXT(1) == '/')) {
        xmlFatalErr(ctxt, XML_ERR_NOT_WELL_BALANCED, NULL);
    } else if (RAW != 0) {
        xmlFatalErr(ctxt, XML_ERR_EXTRA_CONTENT, NULL);
    }
    if (ctxt->node != newDoc->children) {
        xmlFatalErr(ctxt, XML_ERR_NOT_WELL_BALANCED, NULL);
    }

    if (!ctxt->wellFormed) {
        if (ctxt->errNo == 0)
            ret = 1;
        else
            ret = ctxt->errNo;
    } else {
        if (lst != NULL) {
            xmlNodePtr cur;

            /*
             * Return the newly created nodeset after unlinking it from
             * they pseudo parent.
             */
            cur = newDoc->children->children;
            *lst = cur;
            while (cur != NULL) {
                cur->parent = NULL;
                cur = cur->next;
            }
            newDoc->children->children = NULL;
        }
        ret = 0;
    }
    ctxt->sax = oldsax;
    ctxt->dict = NULL;
    ctxt->attsDefault = NULL;
    ctxt->attsSpecial = NULL;
    xmlFreeParserCtxt(ctxt);
    newDoc->intSubset = NULL;
    newDoc->extSubset = NULL;
    xmlFreeDoc(newDoc);

    return(ret);
}

/**
 * xmlParseExternalEntityPrivate:
 * @doc:  the document the chunk pertains to
 * @oldctxt:  the previous parser context if available
 * @sax:  the SAX handler bloc (possibly NULL)
 * @user_data:  The user data returned on SAX callbacks (possibly NULL)
 * @depth:  Used for loop detection, use 0
 * @URL:  the URL for the entity to load
 * @ID:  the System ID for the entity to load
 * @list:  the return value for the set of parsed nodes
 *
 * Private version of xmlParseExternalEntity()
 *
 * Returns 0 if the entity is well formed, -1 in case of args problem and
 *    the parser error code otherwise
 */

static xmlParserErrors
xmlParseExternalEntityPrivate(xmlDocPtr doc, xmlParserCtxtPtr oldctxt,
                      xmlSAXHandlerPtr sax,
                      void *user_data, int depth, const xmlChar *URL,
                      const xmlChar *ID, xmlNodePtr *list) {
    xmlParserCtxtPtr ctxt;
    xmlDocPtr newDoc;
    xmlNodePtr newRoot;
    xmlSAXHandlerPtr oldsax = NULL;
    xmlParserErrors ret = XML_ERR_OK;
    xmlChar start[4];
    xmlCharEncoding enc;

    if (((depth > 40) &&
        ((oldctxt == NULL) || (oldctxt->options & XML_PARSE_HUGE) == 0)) ||
        (depth > 1024)) {
        return(XML_ERR_ENTITY_LOOP);
    }

    if (list != NULL)
        *list = NULL;
    if ((URL == NULL) && (ID == NULL))
        return(XML_ERR_INTERNAL_ERROR);
    if (doc == NULL)
        return(XML_ERR_INTERNAL_ERROR);


    ctxt = xmlCreateEntityParserCtxtInternal(URL, ID, NULL, oldctxt);
    if (ctxt == NULL) return(XML_WAR_UNDECLARED_ENTITY);
    ctxt->userData = ctxt;
    if (oldctxt != NULL) {
        ctxt->_private = oldctxt->_private;
        ctxt->loadsubset = oldctxt->loadsubset;
        ctxt->validate = oldctxt->validate;
        ctxt->external = oldctxt->external;
        ctxt->record_info = oldctxt->record_info;
        ctxt->node_seq.maximum = oldctxt->node_seq.maximum;
        ctxt->node_seq.length = oldctxt->node_seq.length;
        ctxt->node_seq.buffer = oldctxt->node_seq.buffer;
    } else {
        /*
         * Doing validity checking on chunk without context
         * doesn't make sense
         */
        ctxt->_private = NULL;
        ctxt->validate = 0;
        ctxt->external = 2;
        ctxt->loadsubset = 0;
    }
    if (sax != NULL) {
        oldsax = ctxt->sax;
        ctxt->sax = sax;
        if (user_data != NULL)
            ctxt->userData = user_data;
    }
    xmlDetectSAX2(ctxt);
    newDoc = xmlNewDoc(BAD_CAST "1.0");
    if (newDoc == NULL) {
        ctxt->node_seq.maximum = 0;
        ctxt->node_seq.length = 0;
        ctxt->node_seq.buffer = NULL;
        xmlFreeParserCtxt(ctxt);
        return(XML_ERR_INTERNAL_ERROR);
    }
    newDoc->properties = XML_DOC_INTERNAL;
    newDoc->intSubset = doc->intSubset;
    newDoc->extSubset = doc->extSubset;
    newDoc->dict = doc->dict;
    xmlDictReference(newDoc->dict);

    if (doc->URL != NULL) {
        newDoc->URL = xmlStrdup(doc->URL);
    }
    newRoot = xmlNewDocNode(newDoc, NULL, BAD_CAST "pseudoroot", NULL);
    if (newRoot == NULL) {
        if (sax != NULL)
            ctxt->sax = oldsax;
        ctxt->node_seq.maximum = 0;
        ctxt->node_seq.length = 0;
        ctxt->node_seq.buffer = NULL;
        xmlFreeParserCtxt(ctxt);
        newDoc->intSubset = NULL;
        newDoc->extSubset = NULL;
        xmlFreeDoc(newDoc);
        return(XML_ERR_INTERNAL_ERROR);
    }
    xmlAddChild((xmlNodePtr) newDoc, newRoot);
    nodePush(ctxt, newDoc->children);
    ctxt->myDoc = doc;
    newRoot->doc = doc;

    /*
     * Get the 4 first bytes and decode the charset
     * if enc != XML_CHAR_ENCODING_NONE
     * plug some encoding conversion routines.
     */
    GROW;
    if ((ctxt->input->end - ctxt->input->cur) >= 4) {
        start[0] = RAW;
        start[1] = NXT(1);
        start[2] = NXT(2);
        start[3] = NXT(3);
        enc = xmlDetectCharEncoding(start, 4);
        if (enc != XML_CHAR_ENCODING_NONE) {
            xmlSwitchEncoding(ctxt, enc);
        }
    }

    /*
     * Parse a possible text declaration first
     */
    if ((CMP5(CUR_PTR, '<', '?', 'x', 'm', 'l')) && (IS_BLANK_CH(NXT(5)))) {
        xmlParseTextDecl(ctxt);
    }

    ctxt->instate = XML_PARSER_CONTENT;
    ctxt->depth = depth;

    xmlParseContent(ctxt);

    if ((RAW == '<') && (NXT(1) == '/')) {
        xmlFatalErr(ctxt, XML_ERR_NOT_WELL_BALANCED, NULL);
    } else if (RAW != 0) {
        xmlFatalErr(ctxt, XML_ERR_EXTRA_CONTENT, NULL);
    }
    if (ctxt->node != newDoc->children) {
        xmlFatalErr(ctxt, XML_ERR_NOT_WELL_BALANCED, NULL);
    }

    if (!ctxt->wellFormed) {
        if (ctxt->errNo == 0)
            ret = XML_ERR_INTERNAL_ERROR;
        else
            ret = (xmlParserErrors)ctxt->errNo;
    } else {
        if (list != NULL) {
            xmlNodePtr cur;

            /*
             * Return the newly created nodeset after unlinking it from
             * they pseudo parent.
             */
            cur = newDoc->children->children;
            *list = cur;
            while (cur != NULL) {
                cur->parent = NULL;
                cur = cur->next;
            }
            newDoc->children->children = NULL;
        }
        ret = XML_ERR_OK;
    }

    /*
     * Record in the parent context the number of entities replacement
     * done when parsing that reference.
     */
    if (oldctxt != NULL)
        oldctxt->nbentities += ctxt->nbentities;

    /*
     * Also record the size of the entity parsed
     */
    if (ctxt->input != NULL) {
        oldctxt->sizeentities += ctxt->input->consumed;
        oldctxt->sizeentities += (ctxt->input->cur - ctxt->input->base);
    }
    /*
     * And record the last error if any
     */
    if (ctxt->lastError.code != XML_ERR_OK)
        xmlCopyError(&ctxt->lastError, &oldctxt->lastError);

    if (sax != NULL) 
        ctxt->sax = oldsax;
    oldctxt->node_seq.maximum = ctxt->node_seq.maximum;
    oldctxt->node_seq.length = ctxt->node_seq.length;
    oldctxt->node_seq.buffer = ctxt->node_seq.buffer;
    ctxt->node_seq.maximum = 0;
    ctxt->node_seq.length = 0;
    ctxt->node_seq.buffer = NULL;
    xmlFreeParserCtxt(ctxt);
    newDoc->intSubset = NULL;
    newDoc->extSubset = NULL;
    xmlFreeDoc(newDoc);

    return(ret);
}

#ifdef LIBXML_SAX1_ENABLED
/**
 * xmlParseExternalEntity:
 * @doc:  the document the chunk pertains to
 * @sax:  the SAX handler bloc (possibly NULL)
 * @user_data:  The user data returned on SAX callbacks (possibly NULL)
 * @depth:  Used for loop detection, use 0
 * @URL:  the URL for the entity to load
 * @ID:  the System ID for the entity to load
 * @lst:  the return value for the set of parsed nodes
 *
 * Parse an external general entity
 * An external general parsed entity is well-formed if it matches the
 * production labeled extParsedEnt.
 *
 * [78] extParsedEnt ::= TextDecl? content
 *
 * Returns 0 if the entity is well formed, -1 in case of args problem and
 *    the parser error code otherwise
 */

int
xmlParseExternalEntity(xmlDocPtr doc, xmlSAXHandlerPtr sax, void *user_data,
          int depth, const xmlChar *URL, const xmlChar *ID, xmlNodePtr *lst) {
    return(xmlParseExternalEntityPrivate(doc, NULL, sax, user_data, depth, URL,
                                       ID, lst));
}

/**
 * xmlParseBalancedChunkMemory:
 * @doc:  the document the chunk pertains to
 * @sax:  the SAX handler bloc (possibly NULL)
 * @user_data:  The user data returned on SAX callbacks (possibly NULL)
 * @depth:  Used for loop detection, use 0
 * @string:  the input string in UTF8 or ISO-Latin (zero terminated)
 * @lst:  the return value for the set of parsed nodes
 *
 * Parse a well-balanced chunk of an XML document
 * called by the parser
 * The allowed sequence for the Well Balanced Chunk is the one defined by
 * the content production in the XML grammar:
 *
 * [43] content ::= (element | CharData | Reference | CDSect | PI | Comment)*
 *
 * Returns 0 if the chunk is well balanced, -1 in case of args problem and
 *    the parser error code otherwise
 */

int
xmlParseBalancedChunkMemory(xmlDocPtr doc, xmlSAXHandlerPtr sax,
     void *user_data, int depth, const xmlChar *string, xmlNodePtr *lst) {
    return xmlParseBalancedChunkMemoryRecover( doc, sax, user_data,
                                                depth, string, lst, 0 );
}
#endif /* LIBXML_SAX1_ENABLED */

/**
 * xmlParseBalancedChunkMemoryInternal:
 * @oldctxt:  the existing parsing context
 * @string:  the input string in UTF8 or ISO-Latin (zero terminated)
 * @user_data:  the user data field for the parser context
 * @lst:  the return value for the set of parsed nodes
 *
 *
 * Parse a well-balanced chunk of an XML document
 * called by the parser
 * The allowed sequence for the Well Balanced Chunk is the one defined by
 * the content production in the XML grammar:
 *
 * [43] content ::= (element | CharData | Reference | CDSect | PI | Comment)*
 *
 * Returns XML_ERR_OK if the chunk is well balanced, and the parser
 * error code otherwise
 *
 * In case recover is set to 1, the nodelist will not be empty even if
 * the parsed chunk is not well balanced.
 */
static xmlParserErrors
xmlParseBalancedChunkMemoryInternal(xmlParserCtxtPtr oldctxt,
        const xmlChar *string, void *user_data, xmlNodePtr *lst) {
    xmlParserCtxtPtr ctxt;
    xmlDocPtr newDoc = NULL;
    xmlNodePtr newRoot;
    xmlSAXHandlerPtr oldsax = NULL;
    xmlNodePtr content = NULL;
    xmlNodePtr last = NULL;
    int size;
    xmlParserErrors ret = XML_ERR_OK;
#ifdef SAX2
    int i;
#endif

    if (((oldctxt->depth > 40) && ((oldctxt->options & XML_PARSE_HUGE) == 0)) ||
        (oldctxt->depth >  1024)) {
        return(XML_ERR_ENTITY_LOOP);
    }


    if (lst != NULL)
        *lst = NULL;
    if (string == NULL)
        return(XML_ERR_INTERNAL_ERROR);

    size = xmlStrlen(string);

    ctxt = xmlCreateMemoryParserCtxt((char *) string, size);
    if (ctxt == NULL) return(XML_WAR_UNDECLARED_ENTITY);
    if (user_data != NULL)
        ctxt->userData = user_data;
    else
        ctxt->userData = ctxt;
    if (ctxt->dict != NULL) xmlDictFree(ctxt->dict);
    ctxt->dict = oldctxt->dict;
    ctxt->str_xml = xmlDictLookup(ctxt->dict, BAD_CAST "xml", 3);
    ctxt->str_xmlns = xmlDictLookup(ctxt->dict, BAD_CAST "xmlns", 5);
    ctxt->str_xml_ns = xmlDictLookup(ctxt->dict, XML_XML_NAMESPACE, 36);

#ifdef SAX2
    /* propagate namespaces down the entity */
    for (i = 0;i < oldctxt->nsNr;i += 2) {
        nsPush(ctxt, oldctxt->nsTab[i], oldctxt->nsTab[i+1]);
    }
#endif

    oldsax = ctxt->sax;
    ctxt->sax = oldctxt->sax;
    xmlDetectSAX2(ctxt);
    ctxt->replaceEntities = oldctxt->replaceEntities;
    ctxt->options = oldctxt->options;

    ctxt->_private = oldctxt->_private;
    if (oldctxt->myDoc == NULL) {
        newDoc = xmlNewDoc(BAD_CAST "1.0");
        if (newDoc == NULL) {
            ctxt->sax = oldsax;
            ctxt->dict = NULL;
            xmlFreeParserCtxt(ctxt);
            return(XML_ERR_INTERNAL_ERROR);
        }
        newDoc->properties = XML_DOC_INTERNAL;
        newDoc->dict = ctxt->dict;
        xmlDictReference(newDoc->dict);
        ctxt->myDoc = newDoc;
    } else {
        ctxt->myDoc = oldctxt->myDoc;
        content = ctxt->myDoc->children;
        last = ctxt->myDoc->last;
    }
    newRoot = xmlNewDocNode(ctxt->myDoc, NULL, BAD_CAST "pseudoroot", NULL);
    if (newRoot == NULL) {
        ctxt->sax = oldsax;
        ctxt->dict = NULL;
        xmlFreeParserCtxt(ctxt);
        if (newDoc != NULL) {
            xmlFreeDoc(newDoc);
        }
        return(XML_ERR_INTERNAL_ERROR);
    }
    ctxt->myDoc->children = NULL;
    ctxt->myDoc->last = NULL;
    xmlAddChild((xmlNodePtr) ctxt->myDoc, newRoot);
    nodePush(ctxt, ctxt->myDoc->children);
    ctxt->instate = XML_PARSER_CONTENT;
    ctxt->depth = oldctxt->depth + 1;

    ctxt->validate = 0;
    ctxt->loadsubset = oldctxt->loadsubset;
    if ((oldctxt->validate) || (oldctxt->replaceEntities != 0)) {
        /*
         * ID/IDREF registration will be done in xmlValidateElement below
         */
        ctxt->loadsubset |= XML_SKIP_IDS;
    }
    ctxt->dictNames = oldctxt->dictNames;
    ctxt->attsDefault = oldctxt->attsDefault;
    ctxt->attsSpecial = oldctxt->attsSpecial;

    xmlParseContent(ctxt);
    if ((RAW == '<') && (NXT(1) == '/')) {
        xmlFatalErr(ctxt, XML_ERR_NOT_WELL_BALANCED, NULL);
    } else if (RAW != 0) {
        xmlFatalErr(ctxt, XML_ERR_EXTRA_CONTENT, NULL);
    }
    if (ctxt->node != ctxt->myDoc->children) {
        xmlFatalErr(ctxt, XML_ERR_NOT_WELL_BALANCED, NULL);
    }

    if (!ctxt->wellFormed) {
        if (ctxt->errNo == 0)
            ret = XML_ERR_INTERNAL_ERROR;
        else
            ret = (xmlParserErrors)ctxt->errNo;
    } else {
      ret = XML_ERR_OK;
    }

    if ((lst != NULL) && (ret == XML_ERR_OK)) {
        xmlNodePtr cur;

        /*
         * Return the newly created nodeset after unlinking it from
         * they pseudo parent.
         */
        cur = ctxt->myDoc->children->children;
        *lst = cur;
        while (cur != NULL) {
#ifdef LIBXML_VALID_ENABLED
            if ((oldctxt->validate) && (oldctxt->wellFormed) &&
                (oldctxt->myDoc) && (oldctxt->myDoc->intSubset) &&
                (cur->type == XML_ELEMENT_NODE)) {
                oldctxt->valid &= xmlValidateElement(&oldctxt->vctxt,
                        oldctxt->myDoc, cur);
            }
#endif /* LIBXML_VALID_ENABLED */
            cur->parent = NULL;
            cur = cur->next;
        }
        ctxt->myDoc->children->children = NULL;
    }
    if (ctxt->myDoc != NULL) {
        xmlFreeNode(ctxt->myDoc->children);
        ctxt->myDoc->children = content;
        ctxt->myDoc->last = last;
    }

    /*
     * Record in the parent context the number of entities replacement
     * done when parsing that reference.
     */
    if (oldctxt != NULL)
        oldctxt->nbentities += ctxt->nbentities;

    /*
     * Also record the last error if any
     */
    if (ctxt->lastError.code != XML_ERR_OK)
        xmlCopyError(&ctxt->lastError, &oldctxt->lastError);

    ctxt->sax = oldsax;
    ctxt->dict = NULL;
    ctxt->attsDefault = NULL;
    ctxt->attsSpecial = NULL;
    xmlFreeParserCtxt(ctxt);
    if (newDoc != NULL) {
        xmlFreeDoc(newDoc);
    }

    return(ret);
}

/**
 * xmlParseInNodeContext:
 * @node:  the context node
 * @data:  the input string
 * @datalen:  the input string length in bytes
 * @options:  a combination of xmlParserOption
 * @lst:  the return value for the set of parsed nodes
 *
 * Parse a well-balanced chunk of an XML document
 * within the context (DTD, namespaces, etc ...) of the given node.
 *
 * The allowed sequence for the data is a Well Balanced Chunk defined by
 * the content production in the XML grammar:
 *
 * [43] content ::= (element | CharData | Reference | CDSect | PI | Comment)*
 *
 * Returns XML_ERR_OK if the chunk is well balanced, and the parser
 * error code otherwise
 */
xmlParserErrors
xmlParseInNodeContext(xmlNodePtr node, const char *data, int datalen,
                      int options, xmlNodePtr *lst) {
#ifdef SAX2
    xmlParserCtxtPtr ctxt;
    xmlDocPtr doc = NULL;
    xmlNodePtr fake, cur;
    int nsnr = 0;

    xmlParserErrors ret = XML_ERR_OK;

    /*
     * check all input parameters, grab the document
     */
    if ((lst == NULL) || (node == NULL) || (data == NULL) || (datalen < 0))
        return(XML_ERR_INTERNAL_ERROR);
    switch (node->type) {
        case XML_ELEMENT_NODE:
        case XML_ATTRIBUTE_NODE:
        case XML_TEXT_NODE:
        case XML_CDATA_SECTION_NODE:
        case XML_ENTITY_REF_NODE:
        case XML_PI_NODE:
        case XML_COMMENT_NODE:
        case XML_DOCUMENT_NODE:
        case XML_HTML_DOCUMENT_NODE:
            break;
        default:
            return(XML_ERR_INTERNAL_ERROR);

    }
    while ((node != NULL) && (node->type != XML_ELEMENT_NODE) &&
           (node->type != XML_DOCUMENT_NODE) &&
           (node->type != XML_HTML_DOCUMENT_NODE))
        node = node->parent;
    if (node == NULL)
        return(XML_ERR_INTERNAL_ERROR);
    if (node->type == XML_ELEMENT_NODE)
        doc = node->doc;
    else
        doc = (xmlDocPtr) node;
    if (doc == NULL)
        return(XML_ERR_INTERNAL_ERROR);

    /*
     * allocate a context and set-up everything not related to the
     * node position in the tree
     */
    if (doc->type == XML_DOCUMENT_NODE)
        ctxt = xmlCreateMemoryParserCtxt((char *) data, datalen);
#ifdef LIBXML_HTML_ENABLED
    else if (doc->type == XML_HTML_DOCUMENT_NODE) {
        ctxt = htmlCreateMemoryParserCtxt((char *) data, datalen);
        /*
         * When parsing in context, it makes no sense to add implied
         * elements like html/body/etc...
         */
        options |= HTML_PARSE_NOIMPLIED;
    }
#endif
    else
        return(XML_ERR_INTERNAL_ERROR);

    if (ctxt == NULL)
        return(XML_ERR_NO_MEMORY);

    /*
     * Use input doc's dict if present, else assure XML_PARSE_NODICT is set.
     * We need a dictionary for xmlDetectSAX2, so if there's no doc dict
     * we must wait until the last moment to free the original one.
     */
    if (doc->dict != NULL) {
        if (ctxt->dict != NULL)
            xmlDictFree(ctxt->dict);
        ctxt->dict = doc->dict;
    } else
        options |= XML_PARSE_NODICT;

    if (doc->encoding != NULL) {
        xmlCharEncodingHandlerPtr hdlr;

        if (ctxt->encoding != NULL)
            xmlFree((xmlChar *) ctxt->encoding);
        ctxt->encoding = xmlStrdup((const xmlChar *) doc->encoding);

        hdlr = xmlFindCharEncodingHandler(doc->encoding);
        if (hdlr != NULL) {
            xmlSwitchToEncoding(ctxt, hdlr);
        } else {
            return(XML_ERR_UNSUPPORTED_ENCODING);
        }
    }

    xmlCtxtUseOptionsInternal(ctxt, options, NULL);
    xmlDetectSAX2(ctxt);
    ctxt->myDoc = doc;

    fake = xmlNewComment(NULL);
    if (fake == NULL) {
        xmlFreeParserCtxt(ctxt);
        return(XML_ERR_NO_MEMORY);
    }
    xmlAddChild(node, fake);

    if (node->type == XML_ELEMENT_NODE) {
        nodePush(ctxt, node);
        /*
         * initialize the SAX2 namespaces stack
         */
        cur = node;
        while ((cur != NULL) && (cur->type == XML_ELEMENT_NODE)) {
            xmlNsPtr ns = cur->nsDef;
            const xmlChar *iprefix, *ihref;

            while (ns != NULL) {
                if (ctxt->dict) {
                    iprefix = xmlDictLookup(ctxt->dict, ns->prefix, -1);
                    ihref = xmlDictLookup(ctxt->dict, ns->href, -1);
                } else {
                    iprefix = ns->prefix;
                    ihref = ns->href;
                }

                if (xmlGetNamespace(ctxt, iprefix) == NULL) {
                    nsPush(ctxt, iprefix, ihref);
                    nsnr++;
                }
                ns = ns->next;
            }
            cur = cur->parent;
        }
        ctxt->instate = XML_PARSER_CONTENT;
    }

    if ((ctxt->validate) || (ctxt->replaceEntities != 0)) {
        /*
         * ID/IDREF registration will be done in xmlValidateElement below
         */
        ctxt->loadsubset |= XML_SKIP_IDS;
    }

#ifdef LIBXML_HTML_ENABLED
    if (doc->type == XML_HTML_DOCUMENT_NODE)
        __htmlParseContent(ctxt);
    else
#endif
        xmlParseContent(ctxt);

    nsPop(ctxt, nsnr);
    if ((RAW == '<') && (NXT(1) == '/')) {
        xmlFatalErr(ctxt, XML_ERR_NOT_WELL_BALANCED, NULL);
    } else if (RAW != 0) {
        xmlFatalErr(ctxt, XML_ERR_EXTRA_CONTENT, NULL);
    }
    if ((ctxt->node != NULL) && (ctxt->node != node)) {
        xmlFatalErr(ctxt, XML_ERR_NOT_WELL_BALANCED, NULL);
        ctxt->wellFormed = 0;
    }

    if (!ctxt->wellFormed) {
        if (ctxt->errNo == 0)
            ret = XML_ERR_INTERNAL_ERROR;
        else
            ret = (xmlParserErrors)ctxt->errNo;
    } else {
        ret = XML_ERR_OK;
    }

    /*
     * Return the newly created nodeset after unlinking it from
     * the pseudo sibling.
     */

    cur = fake->next;
    fake->next = NULL;
    node->last = fake;

    if (cur != NULL) {
        cur->prev = NULL;
    }

    *lst = cur;

    while (cur != NULL) {
        cur->parent = NULL;
        cur = cur->next;
    }

    xmlUnlinkNode(fake);
    xmlFreeNode(fake);


    if (ret != XML_ERR_OK) {
        xmlFreeNodeList(*lst);
        *lst = NULL;
    }

    if (doc->dict != NULL)
        ctxt->dict = NULL;
    xmlFreeParserCtxt(ctxt);

    return(ret);
#else /* !SAX2 */
    return(XML_ERR_INTERNAL_ERROR);
#endif
}

#ifdef LIBXML_SAX1_ENABLED
/**
 * xmlParseBalancedChunkMemoryRecover:
 * @doc:  the document the chunk pertains to
 * @sax:  the SAX handler bloc (possibly NULL)
 * @user_data:  The user data returned on SAX callbacks (possibly NULL)
 * @depth:  Used for loop detection, use 0
 * @string:  the input string in UTF8 or ISO-Latin (zero terminated)
 * @lst:  the return value for the set of parsed nodes
 * @recover: return nodes even if the data is broken (use 0)
 *
 *
 * Parse a well-balanced chunk of an XML document
 * called by the parser
 * The allowed sequence for the Well Balanced Chunk is the one defined by
 * the content production in the XML grammar:
 *
 * [43] content ::= (element | CharData | Reference | CDSect | PI | Comment)*
 *
 * Returns 0 if the chunk is well balanced, -1 in case of args problem and
 *    the parser error code otherwise
 *
 * In case recover is set to 1, the nodelist will not be empty even if
 * the parsed chunk is not well balanced, assuming the parsing succeeded to
 * some extent.
 */
int
xmlParseBalancedChunkMemoryRecover(xmlDocPtr doc, xmlSAXHandlerPtr sax,
     void *user_data, int depth, const xmlChar *string, xmlNodePtr *lst,
     int recover) {
    xmlParserCtxtPtr ctxt;
    xmlDocPtr newDoc;
    xmlSAXHandlerPtr oldsax = NULL;
    xmlNodePtr content, newRoot;
    int size;
    int ret = 0;

    if (depth > 40) {
        return(XML_ERR_ENTITY_LOOP);
    }


    if (lst != NULL)
        *lst = NULL;
    if (string == NULL)
        return(-1);

    size = xmlStrlen(string);

    ctxt = xmlCreateMemoryParserCtxt((char *) string, size);
    if (ctxt == NULL) return(-1);
    ctxt->userData = ctxt;
    if (sax != NULL) {
        oldsax = ctxt->sax;
        ctxt->sax = sax;
        if (user_data != NULL)
            ctxt->userData = user_data;
    }
    newDoc = xmlNewDoc(BAD_CAST "1.0");
    if (newDoc == NULL) {
        xmlFreeParserCtxt(ctxt);
        return(-1);
    }
    newDoc->properties = XML_DOC_INTERNAL;
    if ((doc != NULL) && (doc->dict != NULL)) {
        xmlDictFree(ctxt->dict);
        ctxt->dict = doc->dict;
        xmlDictReference(ctxt->dict);
        ctxt->str_xml = xmlDictLookup(ctxt->dict, BAD_CAST "xml", 3);
        ctxt->str_xmlns = xmlDictLookup(ctxt->dict, BAD_CAST "xmlns", 5);
        ctxt->str_xml_ns = xmlDictLookup(ctxt->dict, XML_XML_NAMESPACE, 36);
        ctxt->dictNames = 1;
    } else {
        xmlCtxtUseOptionsInternal(ctxt, XML_PARSE_NODICT, NULL);
    }
    if (doc != NULL) {
        newDoc->intSubset = doc->intSubset;
        newDoc->extSubset = doc->extSubset;
    }
    newRoot = xmlNewDocNode(newDoc, NULL, BAD_CAST "pseudoroot", NULL);
    if (newRoot == NULL) {
        if (sax != NULL)
            ctxt->sax = oldsax;
        xmlFreeParserCtxt(ctxt);
        newDoc->intSubset = NULL;
        newDoc->extSubset = NULL;
        xmlFreeDoc(newDoc);
        return(-1);
    }
    xmlAddChild((xmlNodePtr) newDoc, newRoot);
    nodePush(ctxt, newRoot);
    if (doc == NULL) {
        ctxt->myDoc = newDoc;
    } else {
        ctxt->myDoc = newDoc;
        newDoc->children->doc = doc;
        /* Ensure that doc has XML spec namespace */
        xmlSearchNsByHref(doc, (xmlNodePtr)doc, XML_XML_NAMESPACE);
        newDoc->oldNs = doc->oldNs;
    }
    ctxt->instate = XML_PARSER_CONTENT;
    ctxt->depth = depth;

    /*
     * Doing validity checking on chunk doesn't make sense
     */
    ctxt->validate = 0;
    ctxt->loadsubset = 0;
    xmlDetectSAX2(ctxt);

    if ( doc != NULL ){
        content = doc->children;
        doc->children = NULL;
        xmlParseContent(ctxt);
        doc->children = content;
    }
    else {
        xmlParseContent(ctxt);
    }
    if ((RAW == '<') && (NXT(1) == '/')) {
        xmlFatalErr(ctxt, XML_ERR_NOT_WELL_BALANCED, NULL);
    } else if (RAW != 0) {
        xmlFatalErr(ctxt, XML_ERR_EXTRA_CONTENT, NULL);
    }
    if (ctxt->node != newDoc->children) {
        xmlFatalErr(ctxt, XML_ERR_NOT_WELL_BALANCED, NULL);
    }

    if (!ctxt->wellFormed) {
        if (ctxt->errNo == 0)
            ret = 1;
        else
            ret = ctxt->errNo;
    } else {
      ret = 0;
    }

    if ((lst != NULL) && ((ret == 0) || (recover == 1))) {
        xmlNodePtr cur;

        /*
         * Return the newly created nodeset after unlinking it from
         * they pseudo parent.
         */
        cur = newDoc->children->children;
        *lst = cur;
        while (cur != NULL) {
            xmlSetTreeDoc(cur, doc);
            cur->parent = NULL;
            cur = cur->next;
        }
        newDoc->children->children = NULL;
    }

    if (sax != NULL)
        ctxt->sax = oldsax;
    xmlFreeParserCtxt(ctxt);
    newDoc->intSubset = NULL;
    newDoc->extSubset = NULL;
    newDoc->oldNs = NULL;
    xmlFreeDoc(newDoc);

    return(ret);
}

/**
 * xmlSAXParseEntity:
 * @sax:  the SAX handler block
 * @filename:  the filename
 *
 * parse an XML external entity out of context and build a tree.
 * It use the given SAX function block to handle the parsing callback.
 * If sax is NULL, fallback to the default DOM tree building routines.
 *
 * [78] extParsedEnt ::= TextDecl? content
 *
 * This correspond to a "Well Balanced" chunk
 *
 * Returns the resulting document tree
 */

xmlDocPtr
xmlSAXParseEntity(xmlSAXHandlerPtr sax, const char *filename) {
    xmlDocPtr ret;
    xmlParserCtxtPtr ctxt;

    ctxt = xmlCreateFileParserCtxt(filename);
    if (ctxt == NULL) {
        return(NULL);
    }
    if (sax != NULL) {
        if (ctxt->sax != NULL)
            xmlFree(ctxt->sax);
        ctxt->sax = sax;
        ctxt->userData = NULL;
    }

    xmlParseExtParsedEnt(ctxt);

    if (ctxt->wellFormed)
        ret = ctxt->myDoc;
    else {
        ret = NULL;
        xmlFreeDoc(ctxt->myDoc);
        ctxt->myDoc = NULL;
    }
    if (sax != NULL)
        ctxt->sax = NULL;
    xmlFreeParserCtxt(ctxt);

    return(ret);
}

/**
 * xmlParseEntity:
 * @filename:  the filename
 *
 * parse an XML external entity out of context and build a tree.
 *
 * [78] extParsedEnt ::= TextDecl? content
 *
 * This correspond to a "Well Balanced" chunk
 *
 * Returns the resulting document tree
 */

xmlDocPtr
xmlParseEntity(const char *filename) {
    return(xmlSAXParseEntity(NULL, filename));
}
#endif /* LIBXML_SAX1_ENABLED */

/**
 * xmlCreateEntityParserCtxtInternal:
 * @URL:  the entity URL
 * @ID:  the entity PUBLIC ID
 * @base:  a possible base for the target URI
 * @pctx:  parser context used to set options on new context
 *
 * Create a parser context for an external entity
 * Automatic support for ZLIB/Compress compressed document is provided
 * by default if found at compile-time.
 *
 * Returns the new parser context or NULL
 */
static xmlParserCtxtPtr
xmlCreateEntityParserCtxtInternal(const xmlChar *URL, const xmlChar *ID,
                          const xmlChar *base, xmlParserCtxtPtr pctx) {
    xmlParserCtxtPtr ctxt;
    xmlParserInputPtr inputStream;
    char *directory = NULL;
    xmlChar *uri;

    ctxt = xmlNewParserCtxt();
    if (ctxt == NULL) {
        return(NULL);
    }

    if (pctx != NULL) {
        ctxt->options = pctx->options;
        ctxt->_private = pctx->_private;
    }

    uri = xmlBuildURI(URL, base);

    if (uri == NULL) {
        inputStream = xmlLoadExternalEntity((char *)URL, (char *)ID, ctxt);
        if (inputStream == NULL) {
            xmlFreeParserCtxt(ctxt);
            return(NULL);
        }

        inputPush(ctxt, inputStream);

        if ((ctxt->directory == NULL) && (directory == NULL))
            directory = xmlParserGetDirectory((char *)URL);
        if ((ctxt->directory == NULL) && (directory != NULL))
            ctxt->directory = directory;
    } else {
        inputStream = xmlLoadExternalEntity((char *)uri, (char *)ID, ctxt);
        if (inputStream == NULL) {
            xmlFree(uri);
            xmlFreeParserCtxt(ctxt);
            return(NULL);
        }

        inputPush(ctxt, inputStream);

        if ((ctxt->directory == NULL) && (directory == NULL))
            directory = xmlParserGetDirectory((char *)uri);
        if ((ctxt->directory == NULL) && (directory != NULL))
            ctxt->directory = directory;
        xmlFree(uri);
    }
    return(ctxt);
}

/**
 * xmlCreateEntityParserCtxt:
 * @URL:  the entity URL
 * @ID:  the entity PUBLIC ID
 * @base:  a possible base for the target URI
 *
 * Create a parser context for an external entity
 * Automatic support for ZLIB/Compress compressed document is provided
 * by default if found at compile-time.
 *
 * Returns the new parser context or NULL
 */
xmlParserCtxtPtr
xmlCreateEntityParserCtxt(const xmlChar *URL, const xmlChar *ID,
                          const xmlChar *base) {
    return xmlCreateEntityParserCtxtInternal(URL, ID, base, NULL);

}

/************************************************************************
 *                                                                      *
 *              Front ends when parsing from a file                     *
 *                                                                      *
 ************************************************************************/

/**
 * xmlCreateURLParserCtxt:
 * @filename:  the filename or URL
 * @options:  a combination of xmlParserOption
 *
 * Create a parser context for a file or URL content. 
 * Automatic support for ZLIB/Compress compressed document is provided
 * by default if found at compile-time and for file accesses
 *
 * Returns the new parser context or NULL
 */
xmlParserCtxtPtr
xmlCreateURLParserCtxt(const char *filename, int options)
{
    xmlParserCtxtPtr ctxt;
    xmlParserInputPtr inputStream;
    char *directory = NULL;

    ctxt = xmlNewParserCtxt();
    if (ctxt == NULL) {
        xmlErrMemory(NULL, "cannot allocate parser context");
        return(NULL);
    }

    if (options)
        xmlCtxtUseOptionsInternal(ctxt, options, NULL);
    ctxt->linenumbers = 1;

    inputStream = xmlLoadExternalEntity(filename, NULL, ctxt);
    if (inputStream == NULL) {
        xmlFreeParserCtxt(ctxt);
        return(NULL);
    }

    inputPush(ctxt, inputStream);
    if ((ctxt->directory == NULL) && (directory == NULL))
        directory = xmlParserGetDirectory(filename);
    if ((ctxt->directory == NULL) && (directory != NULL))
        ctxt->directory = directory;

    return(ctxt);
}

/**
 * xmlCreateFileParserCtxt:
 * @filename:  the filename
 *
 * Create a parser context for a file content. 
 * Automatic support for ZLIB/Compress compressed document is provided
 * by default if found at compile-time.
 *
 * Returns the new parser context or NULL
 */
xmlParserCtxtPtr
xmlCreateFileParserCtxt(const char *filename)
{
    return(xmlCreateURLParserCtxt(filename, 0));
}

#ifdef LIBXML_SAX1_ENABLED
/**
 * xmlSAXParseFileWithData:
 * @sax:  the SAX handler block
 * @filename:  the filename
 * @recovery:  work in recovery mode, i.e. tries to read no Well Formed
 *             documents
 * @data:  the userdata
 *
 * parse an XML file and build a tree. Automatic support for ZLIB/Compress
 * compressed document is provided by default if found at compile-time.
 * It use the given SAX function block to handle the parsing callback.
 * If sax is NULL, fallback to the default DOM tree building routines.
 *
 * User data (void *) is stored within the parser context in the
 * context's _private member, so it is available nearly everywhere in libxml
 *
 * Returns the resulting document tree
 */

xmlDocPtr
xmlSAXParseFileWithData(xmlSAXHandlerPtr sax, const char *filename,
                        int recovery, void *data) {
    xmlDocPtr ret;
    xmlParserCtxtPtr ctxt;

    xmlInitParser();

    ctxt = xmlCreateFileParserCtxt(filename);
    if (ctxt == NULL) {
        return(NULL);
    }
    if (sax != NULL) {
        if (ctxt->sax != NULL)
            xmlFree(ctxt->sax);
        ctxt->sax = sax;
    }
    xmlDetectSAX2(ctxt);
    if (data!=NULL) {
        ctxt->_private = data;
    }

    if (ctxt->directory == NULL)
        ctxt->directory = xmlParserGetDirectory(filename);

    ctxt->recovery = recovery;

    xmlParseDocument(ctxt);

    if ((ctxt->wellFormed) || recovery) {
        ret = ctxt->myDoc;
        if (ret != NULL) {
            if (ctxt->input->buf->compressed > 0)
                ret->compression = 9;
            else
                ret->compression = ctxt->input->buf->compressed;
        }
    }
    else {
       ret = NULL;
       xmlFreeDoc(ctxt->myDoc);
       ctxt->myDoc = NULL;
    }
    if (sax != NULL)
        ctxt->sax = NULL;
    xmlFreeParserCtxt(ctxt);
    
    return(ret);
}

/**
 * xmlSAXParseFile:
 * @sax:  the SAX handler block
 * @filename:  the filename
 * @recovery:  work in recovery mode, i.e. tries to read no Well Formed
 *             documents
 *
 * parse an XML file and build a tree. Automatic support for ZLIB/Compress
 * compressed document is provided by default if found at compile-time.
 * It use the given SAX function block to handle the parsing callback.
 * If sax is NULL, fallback to the default DOM tree building routines.
 *
 * Returns the resulting document tree
 */

xmlDocPtr
xmlSAXParseFile(xmlSAXHandlerPtr sax, const char *filename,
                          int recovery) {
    return(xmlSAXParseFileWithData(sax,filename,recovery,NULL));
}

/**
 * xmlRecoverDoc:
 * @cur:  a pointer to an array of xmlChar
 *
 * parse an XML in-memory document and build a tree.
 * In the case the document is not Well Formed, a attempt to build a
 * tree is tried anyway
 *
 * Returns the resulting document tree or NULL in case of failure
 */

xmlDocPtr
xmlRecoverDoc(const xmlChar *cur) {
    return(xmlSAXParseDoc(NULL, cur, 1));
}

/**
 * xmlParseFile:
 * @filename:  the filename
 *
 * parse an XML file and build a tree. Automatic support for ZLIB/Compress
 * compressed document is provided by default if found at compile-time.
 *
 * Returns the resulting document tree if the file was wellformed,
 * NULL otherwise.
 */

xmlDocPtr
xmlParseFile(const char *filename) {
    return(xmlSAXParseFile(NULL, filename, 0));
}

/**
 * xmlRecoverFile:
 * @filename:  the filename
 *
 * parse an XML file and build a tree. Automatic support for ZLIB/Compress
 * compressed document is provided by default if found at compile-time.
 * In the case the document is not Well Formed, it attempts to build
 * a tree anyway
 *
 * Returns the resulting document tree or NULL in case of failure
 */

xmlDocPtr
xmlRecoverFile(const char *filename) {
    return(xmlSAXParseFile(NULL, filename, 1));
}


/**
 * xmlSetupParserForBuffer:
 * @ctxt:  an XML parser context
 * @buffer:  a xmlChar * buffer
 * @filename:  a file name
 *
 * Setup the parser context to parse a new buffer; Clears any prior
 * contents from the parser context. The buffer parameter must not be
 * NULL, but the filename parameter can be
 */
void
xmlSetupParserForBuffer(xmlParserCtxtPtr ctxt, const xmlChar* buffer,
                             const char* filename)
{
    xmlParserInputPtr input;

    if ((ctxt == NULL) || (buffer == NULL))
        return;

    input = xmlNewInputStream(ctxt);
    if (input == NULL) {
        xmlErrMemory(NULL, "parsing new buffer: out of memory\n");
        xmlClearParserCtxt(ctxt);
        return;
    }
  
    xmlClearParserCtxt(ctxt);
    if (filename != NULL)
        input->filename = (char *) xmlCanonicPath((const xmlChar *)filename);
    input->base = buffer;
    input->cur = buffer;
    input->end = &buffer[xmlStrlen(buffer)];
    inputPush(ctxt, input);
}

/**
 * xmlSAXUserParseFile:
 * @sax:  a SAX handler
 * @user_data:  The user data returned on SAX callbacks
 * @filename:  a file name
 *
 * parse an XML file and call the given SAX handler routines.
 * Automatic support for ZLIB/Compress compressed document is provided
 * 
 * Returns 0 in case of success or a error number otherwise
 */
int
xmlSAXUserParseFile(xmlSAXHandlerPtr sax, void *user_data,
                    const char *filename) {
    int ret = 0;
    xmlParserCtxtPtr ctxt;
    
    ctxt = xmlCreateFileParserCtxt(filename);
    if (ctxt == NULL) return -1;
    if (ctxt->sax != (xmlSAXHandlerPtr) &xmlDefaultSAXHandler)
        xmlFree(ctxt->sax);
    ctxt->sax = sax;
    xmlDetectSAX2(ctxt);

    if (user_data != NULL)
        ctxt->userData = user_data;
    
    xmlParseDocument(ctxt);
    
    if (ctxt->wellFormed)
        ret = 0;
    else {
        if (ctxt->errNo != 0)
            ret = ctxt->errNo;
        else
            ret = -1;
    }
    if (sax != NULL)
        ctxt->sax = NULL;
    if (ctxt->myDoc != NULL) {
        xmlFreeDoc(ctxt->myDoc);
        ctxt->myDoc = NULL;
    }
    xmlFreeParserCtxt(ctxt);
    
    return ret;
}
#endif /* LIBXML_SAX1_ENABLED */

/************************************************************************
 *                                                                      *
 *              Front ends when parsing from memory                     *
 *                                                                      *
 ************************************************************************/

/**
 * xmlCreateMemoryParserCtxt:
 * @buffer:  a pointer to a char array
 * @size:  the size of the array
 *
 * Create a parser context for an XML in-memory document.
 *
 * Returns the new parser context or NULL
 */
xmlParserCtxtPtr
xmlCreateMemoryParserCtxt(const char *buffer, int size) {
    xmlParserCtxtPtr ctxt;
    xmlParserInputPtr input;
    xmlParserInputBufferPtr buf;

    if (buffer == NULL)
        return(NULL);
    if (size <= 0)
        return(NULL);

    ctxt = xmlNewParserCtxt();
    if (ctxt == NULL)
        return(NULL);

    /* TODO: xmlParserInputBufferCreateStatic, requires some serious changes */
    buf = xmlParserInputBufferCreateMem(buffer, size, XML_CHAR_ENCODING_NONE);
    if (buf == NULL) {
        xmlFreeParserCtxt(ctxt);
        return(NULL);
    }

    input = xmlNewInputStream(ctxt);
    if (input == NULL) {
        xmlFreeParserInputBuffer(buf);
        xmlFreeParserCtxt(ctxt);
        return(NULL);
    }

    input->filename = NULL;
    input->buf = buf;
    input->base = input->buf->buffer->content;
    input->cur = input->buf->buffer->content;
    input->end = &input->buf->buffer->content[input->buf->buffer->use];

    inputPush(ctxt, input);
    return(ctxt);
}

#ifdef LIBXML_SAX1_ENABLED
/**
 * xmlSAXParseMemoryWithData:
 * @sax:  the SAX handler block
 * @buffer:  an pointer to a char array
 * @size:  the size of the array
 * @recovery:  work in recovery mode, i.e. tries to read no Well Formed
 *             documents
 * @data:  the userdata
 *
 * parse an XML in-memory block and use the given SAX function block
 * to handle the parsing callback. If sax is NULL, fallback to the default
 * DOM tree building routines.
 *
 * User data (void *) is stored within the parser context in the
 * context's _private member, so it is available nearly everywhere in libxml
 *
 * Returns the resulting document tree
 */

xmlDocPtr
xmlSAXParseMemoryWithData(xmlSAXHandlerPtr sax, const char *buffer,
                  int size, int recovery, void *data) {
    xmlDocPtr ret;
    xmlParserCtxtPtr ctxt;

    xmlInitParser();

    ctxt = xmlCreateMemoryParserCtxt(buffer, size);
    if (ctxt == NULL) return(NULL);
    if (sax != NULL) {
        if (ctxt->sax != NULL)
            xmlFree(ctxt->sax);
        ctxt->sax = sax;
    }
    xmlDetectSAX2(ctxt);
    if (data!=NULL) {
        ctxt->_private=data;
    }

    ctxt->recovery = recovery;

    xmlParseDocument(ctxt);

    if ((ctxt->wellFormed) || recovery) ret = ctxt->myDoc;
    else {
       ret = NULL;
       xmlFreeDoc(ctxt->myDoc);
       ctxt->myDoc = NULL;
    }
    if (sax != NULL) 
        ctxt->sax = NULL;
    xmlFreeParserCtxt(ctxt);

    return(ret);
}

/**
 * xmlSAXParseMemory:
 * @sax:  the SAX handler block
 * @buffer:  an pointer to a char array
 * @size:  the size of the array
 * @recovery:  work in recovery mode, i.e. tries to read not Well Formed
 *             documents
 *
 * parse an XML in-memory block and use the given SAX function block
 * to handle the parsing callback. If sax is NULL, fallback to the default
 * DOM tree building routines.
 * 
 * Returns the resulting document tree
 */
xmlDocPtr
xmlSAXParseMemory(xmlSAXHandlerPtr sax, const char *buffer,
                  int size, int recovery) {
    return xmlSAXParseMemoryWithData(sax, buffer, size, recovery, NULL);
}

/**
 * xmlParseMemory:
 * @buffer:  an pointer to a char array
 * @size:  the size of the array
 *
 * parse an XML in-memory block and build a tree.
 * 
 * Returns the resulting document tree
 */

xmlDocPtr xmlParseMemory(const char *buffer, int size) {
   return(xmlSAXParseMemory(NULL, buffer, size, 0));
}

/**
 * xmlRecoverMemory:
 * @buffer:  an pointer to a char array
 * @size:  the size of the array
 *
 * parse an XML in-memory block and build a tree.
 * In the case the document is not Well Formed, an attempt to
 * build a tree is tried anyway
 *
 * Returns the resulting document tree or NULL in case of error
 */

xmlDocPtr xmlRecoverMemory(const char *buffer, int size) {
   return(xmlSAXParseMemory(NULL, buffer, size, 1));
}

/**
 * xmlSAXUserParseMemory:
 * @sax:  a SAX handler
 * @user_data:  The user data returned on SAX callbacks
 * @buffer:  an in-memory XML document input
 * @size:  the length of the XML document in bytes
 *
 * A better SAX parsing routine.
 * parse an XML in-memory buffer and call the given SAX handler routines.
 *
 * Returns 0 in case of success or a error number otherwise
 */
int xmlSAXUserParseMemory(xmlSAXHandlerPtr sax, void *user_data,
                          const char *buffer, int size) {
    int ret = 0;
    xmlParserCtxtPtr ctxt;

    xmlInitParser();

    ctxt = xmlCreateMemoryParserCtxt(buffer, size);
    if (ctxt == NULL) return -1;
    if (ctxt->sax != (xmlSAXHandlerPtr) &xmlDefaultSAXHandler)
        xmlFree(ctxt->sax);
    ctxt->sax = sax;
    xmlDetectSAX2(ctxt);

    if (user_data != NULL)
        ctxt->userData = user_data;

    xmlParseDocument(ctxt);
    
    if (ctxt->wellFormed)
        ret = 0;
    else {
        if (ctxt->errNo != 0)
            ret = ctxt->errNo;
        else
            ret = -1;
    }
    if (sax != NULL)
        ctxt->sax = NULL;
    if (ctxt->myDoc != NULL) {
        xmlFreeDoc(ctxt->myDoc);
        ctxt->myDoc = NULL;
    }
    xmlFreeParserCtxt(ctxt);
    
    return ret;
}
#endif /* LIBXML_SAX1_ENABLED */

/**
 * xmlCreateDocParserCtxt:
 * @cur:  a pointer to an array of xmlChar
 *
 * Creates a parser context for an XML in-memory document.
 *
 * Returns the new parser context or NULL
 */
xmlParserCtxtPtr
xmlCreateDocParserCtxt(const xmlChar *cur) {
    int len;

    if (cur == NULL)
        return(NULL);
    len = xmlStrlen(cur);
    return(xmlCreateMemoryParserCtxt((const char *)cur, len));
}

#ifdef LIBXML_SAX1_ENABLED
/**
 * xmlSAXParseDoc:
 * @sax:  the SAX handler block
 * @cur:  a pointer to an array of xmlChar
 * @recovery:  work in recovery mode, i.e. tries to read no Well Formed
 *             documents
 *
 * parse an XML in-memory document and build a tree.
 * It use the given SAX function block to handle the parsing callback.
 * If sax is NULL, fallback to the default DOM tree building routines.
 * 
 * Returns the resulting document tree
 */

xmlDocPtr
xmlSAXParseDoc(xmlSAXHandlerPtr sax, const xmlChar *cur, int recovery) {
    xmlDocPtr ret;
    xmlParserCtxtPtr ctxt;
    xmlSAXHandlerPtr oldsax = NULL;

    if (cur == NULL) return(NULL);


    ctxt = xmlCreateDocParserCtxt(cur);
    if (ctxt == NULL) return(NULL);
    if (sax != NULL) { 
        oldsax = ctxt->sax;
        ctxt->sax = sax;
        ctxt->userData = NULL;
    }
    xmlDetectSAX2(ctxt);

    xmlParseDocument(ctxt);
    if ((ctxt->wellFormed) || recovery) ret = ctxt->myDoc;
    else {
       ret = NULL;
       xmlFreeDoc(ctxt->myDoc);
       ctxt->myDoc = NULL;
    }
    if (sax != NULL)
        ctxt->sax = oldsax;
    xmlFreeParserCtxt(ctxt);
    
    return(ret);
}

/**
 * xmlParseDoc:
 * @cur:  a pointer to an array of xmlChar
 *
 * parse an XML in-memory document and build a tree.
 * 
 * Returns the resulting document tree
 */

xmlDocPtr
xmlParseDoc(const xmlChar *cur) {
    return(xmlSAXParseDoc(NULL, cur, 0));
}
#endif /* LIBXML_SAX1_ENABLED */

#ifdef LIBXML_LEGACY_ENABLED
/************************************************************************
 *                                                                      *
 *      Specific function to keep track of entities references          *
 *      and used by the XSLT debugger                                   *
 *                                                                      *
 ************************************************************************/

static xmlEntityReferenceFunc xmlEntityRefFunc = NULL;

/**
 * xmlAddEntityReference:
 * @ent : A valid entity
 * @firstNode : A valid first node for children of entity
 * @lastNode : A valid last node of children entity 
 *
 * Notify of a reference to an entity of type XML_EXTERNAL_GENERAL_PARSED_ENTITY
 */
static void
xmlAddEntityReference(xmlEntityPtr ent, xmlNodePtr firstNode,
                      xmlNodePtr lastNode)
{
    if (xmlEntityRefFunc != NULL) {
        (*xmlEntityRefFunc) (ent, firstNode, lastNode);
    }
}


/**
 * xmlSetEntityReferenceFunc:
 * @func: A valid function
 *
 * Set the function to call call back when a xml reference has been made
 */
void
xmlSetEntityReferenceFunc(xmlEntityReferenceFunc func)
{
    xmlEntityRefFunc = func;
}
#endif /* LIBXML_LEGACY_ENABLED */

/************************************************************************
 *                                                                      *
 *                              Miscellaneous                           *
 *                                                                      *
 ************************************************************************/

#ifdef LIBXML_XPATH_ENABLED
#include <libxml/xpath.h>
#endif

extern void XMLCDECL xmlGenericErrorDefaultFunc(void *ctx, const char *msg, ...);
static int xmlParserInitialized = 0;

/**
 * xmlInitParser:
 *
 * Initialization function for the XML parser.
 * This is not reentrant. Call once before processing in case of
 * use in multithreaded programs.
 */

void
xmlInitParser(void) {
    if (xmlParserInitialized != 0)
        return;

#ifdef LIBXML_THREAD_ENABLED
    __xmlGlobalInitMutexLock();
    if (xmlParserInitialized == 0) {
#endif
        xmlInitGlobals();
        xmlInitThreads();
        if ((xmlGenericError == xmlGenericErrorDefaultFunc) ||
            (xmlGenericError == NULL))
            initGenericErrorDefaultFunc(NULL);
        xmlInitMemory();
        xmlInitCharEncodingHandlers();
        xmlDefaultSAXHandlerInit();
        xmlRegisterDefaultInputCallbacks();
#ifdef LIBXML_OUTPUT_ENABLED
        xmlRegisterDefaultOutputCallbacks();
#endif /* LIBXML_OUTPUT_ENABLED */
#ifdef LIBXML_HTML_ENABLED
        htmlInitAutoClose();
        htmlDefaultSAXHandlerInit();
#endif
#ifdef LIBXML_XPATH_ENABLED
        xmlXPathInit();
#endif
        xmlParserInitialized = 1;
#ifdef LIBXML_THREAD_ENABLED
    }
    __xmlGlobalInitMutexUnlock();
#endif
}

/**
 * xmlCleanupParser:
 *
 * This function name is somewhat misleading. It does not clean up
 * parser state, it cleans up memory allocated by the library itself.
 * It is a cleanup function for the XML library. It tries to reclaim all
 * related global memory allocated for the library processing.
 * It doesn't deallocate any document related memory. One should
 * call xmlCleanupParser() only when the process has finished using
 * the library and all XML/HTML documents built with it.
 * See also xmlInitParser() which has the opposite function of preparing
 * the library for operations.
 *
 * WARNING: if your application is multithreaded or has plugin support
 *          calling this may crash the application if another thread or
 *          a plugin is still using libxml2. It's sometimes very hard to
 *          guess if libxml2 is in use in the application, some libraries
 *          or plugins may use it without notice. In case of doubt abstain
 *          from calling this function or do it just before calling exit()
 *          to avoid leak reports from valgrind !
 */

void
xmlCleanupParser(void) {
    if (!xmlParserInitialized)
        return;

    xmlCleanupCharEncodingHandlers();
#ifdef LIBXML_CATALOG_ENABLED
    xmlCatalogCleanup();
#endif
    xmlDictCleanup();
    xmlCleanupInputCallbacks();
#ifdef LIBXML_OUTPUT_ENABLED
    xmlCleanupOutputCallbacks();
#endif
#ifdef LIBXML_SCHEMAS_ENABLED
    xmlSchemaCleanupTypes();
    xmlRelaxNGCleanupTypes();
#endif
    xmlCleanupGlobals();
    xmlResetLastError();
    xmlCleanupThreads(); /* must be last if called not from the main thread */
    xmlCleanupMemory();
    xmlParserInitialized = 0;
}

/************************************************************************
 *                                                                      *
 *      New set (2.6.0) of simpler and more flexible APIs               *
 *                                                                      *
 ************************************************************************/

/**
 * DICT_FREE:
 * @str:  a string
 *
 * Free a string if it is not owned by the "dict" dictionnary in the
 * current scope
 */
#define DICT_FREE(str)                                          \
        if ((str) && ((!dict) ||                                \
            (xmlDictOwns(dict, (const xmlChar *)(str)) == 0)))  \
            xmlFree((char *)(str));

/**
 * xmlCtxtReset:
 * @ctxt: an XML parser context
 *
 * Reset a parser context
 */
void
xmlCtxtReset(xmlParserCtxtPtr ctxt)
{
    xmlParserInputPtr input;
    xmlDictPtr dict;
    
    if (ctxt == NULL)
        return;

    dict = ctxt->dict;

    while ((input = inputPop(ctxt)) != NULL) { /* Non consuming */
        xmlFreeInputStream(input);
    }
    ctxt->inputNr = 0;
    ctxt->input = NULL;

    ctxt->spaceNr = 0;
    if (ctxt->spaceTab != NULL) {
        ctxt->spaceTab[0] = -1;
        ctxt->space = &ctxt->spaceTab[0];
    } else {
        ctxt->space = NULL;
    }


    ctxt->nodeNr = 0;
    ctxt->node = NULL;

    ctxt->nameNr = 0;
    ctxt->name = NULL;

    DICT_FREE(ctxt->version);
    ctxt->version = NULL;
    DICT_FREE(ctxt->encoding);
    ctxt->encoding = NULL;
    DICT_FREE(ctxt->directory);
    ctxt->directory = NULL;
    DICT_FREE(ctxt->extSubURI);
    ctxt->extSubURI = NULL;
    DICT_FREE(ctxt->extSubSystem);
    ctxt->extSubSystem = NULL;
    if (ctxt->myDoc != NULL)
        xmlFreeDoc(ctxt->myDoc);
    ctxt->myDoc = NULL;

    ctxt->standalone = -1;
    ctxt->hasExternalSubset = 0;
    ctxt->hasPErefs = 0;
    ctxt->html = 0;
    ctxt->external = 0;
    ctxt->instate = XML_PARSER_START;
    ctxt->token = 0;

    ctxt->wellFormed = 1;
    ctxt->nsWellFormed = 1;
    ctxt->disableSAX = 0;
    ctxt->valid = 1;
#if 0
    ctxt->vctxt.userData = ctxt;
    ctxt->vctxt.error = xmlParserValidityError;
    ctxt->vctxt.warning = xmlParserValidityWarning;
#endif
    ctxt->record_info = 0;
    ctxt->nbChars = 0;
    ctxt->checkIndex = 0;
    ctxt->inSubset = 0;
    ctxt->errNo = XML_ERR_OK;
    ctxt->depth = 0;
    ctxt->charset = XML_CHAR_ENCODING_UTF8;
    ctxt->catalogs = NULL;
    ctxt->nbentities = 0;
    ctxt->sizeentities = 0;
    xmlInitNodeInfoSeq(&ctxt->node_seq);

    if (ctxt->attsDefault != NULL) {
        xmlHashFree(ctxt->attsDefault, (xmlHashDeallocator) xmlFree);
        ctxt->attsDefault = NULL;
    }
    if (ctxt->attsSpecial != NULL) {
        xmlHashFree(ctxt->attsSpecial, NULL);
        ctxt->attsSpecial = NULL;
    }

#ifdef LIBXML_CATALOG_ENABLED
    if (ctxt->catalogs != NULL)
        xmlCatalogFreeLocal(ctxt->catalogs);
#endif
    if (ctxt->lastError.code != XML_ERR_OK)
        xmlResetError(&ctxt->lastError);
}

/**
 * xmlCtxtResetPush:
 * @ctxt: an XML parser context
 * @chunk:  a pointer to an array of chars
 * @size:  number of chars in the array
 * @filename:  an optional file name or URI
 * @encoding:  the document encoding, or NULL
 *
 * Reset a push parser context
 *
 * Returns 0 in case of success and 1 in case of error
 */
int
xmlCtxtResetPush(xmlParserCtxtPtr ctxt, const char *chunk,
                 int size, const char *filename, const char *encoding)
{
    xmlParserInputPtr inputStream;
    xmlParserInputBufferPtr buf;
    xmlCharEncoding enc = XML_CHAR_ENCODING_NONE;

    if (ctxt == NULL)
        return(1);

    if ((encoding == NULL) && (chunk != NULL) && (size >= 4))
        enc = xmlDetectCharEncoding((const xmlChar *) chunk, size);

    buf = xmlAllocParserInputBuffer(enc);
    if (buf == NULL)
        return(1);

    if (ctxt == NULL) {
        xmlFreeParserInputBuffer(buf);
        return(1);
    }

    xmlCtxtReset(ctxt);

    if (ctxt->pushTab == NULL) {
        ctxt->pushTab = (void **) xmlMalloc(ctxt->nameMax * 3 *
                                            sizeof(xmlChar *));
        if (ctxt->pushTab == NULL) {
            xmlErrMemory(ctxt, NULL);
            xmlFreeParserInputBuffer(buf);
            return(1);
        }
    }

    if (filename == NULL) {
        ctxt->directory = NULL;
    } else {
        ctxt->directory = xmlParserGetDirectory(filename);
    }

    inputStream = xmlNewInputStream(ctxt);
    if (inputStream == NULL) {
        xmlFreeParserInputBuffer(buf);
        return(1);
    }

    if (filename == NULL)
        inputStream->filename = NULL;
    else
        inputStream->filename = (char *)
            xmlCanonicPath((const xmlChar *) filename);
    inputStream->buf = buf;
    inputStream->base = inputStream->buf->buffer->content;
    inputStream->cur = inputStream->buf->buffer->content;
    inputStream->end =
        &inputStream->buf->buffer->content[inputStream->buf->buffer->use];

    inputPush(ctxt, inputStream);

    if ((size > 0) && (chunk != NULL) && (ctxt->input != NULL) &&
        (ctxt->input->buf != NULL)) {
        int base = ctxt->input->base - ctxt->input->buf->buffer->content;
        int cur = ctxt->input->cur - ctxt->input->base;

        xmlParserInputBufferPush(ctxt->input->buf, size, chunk);

        ctxt->input->base = ctxt->input->buf->buffer->content + base;
        ctxt->input->cur = ctxt->input->base + cur;
        ctxt->input->end =
            &ctxt->input->buf->buffer->content[ctxt->input->buf->buffer->
                                               use];
#ifdef DEBUG_PUSH
        xmlGenericError(xmlGenericErrorContext, "PP: pushed %d\n", size);
#endif
    }

    if (encoding != NULL) {
        xmlCharEncodingHandlerPtr hdlr;

        if (ctxt->encoding != NULL)
            xmlFree((xmlChar *) ctxt->encoding);
        ctxt->encoding = xmlStrdup((const xmlChar *) encoding);

        hdlr = xmlFindCharEncodingHandler(encoding);
        if (hdlr != NULL) {
            xmlSwitchToEncoding(ctxt, hdlr);
        } else {
            xmlFatalErrMsgStr(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
                              "Unsupported encoding %s\n", BAD_CAST encoding);
        }
    } else if (enc != XML_CHAR_ENCODING_NONE) {
        xmlSwitchEncoding(ctxt, enc);
    }

    return(0);
}


/**
 * xmlCtxtUseOptionsInternal:
 * @ctxt: an XML parser context
 * @options:  a combination of xmlParserOption
 * @encoding:  the user provided encoding to use
 *
 * Applies the options to the parser context
 *
 * Returns 0 in case of success, the set of unknown or unimplemented options
 *         in case of error.
 */
static int
xmlCtxtUseOptionsInternal(xmlParserCtxtPtr ctxt, int options, const char *encoding)
{
    if (ctxt == NULL)
        return(-1);
    if (encoding != NULL) {
        if (ctxt->encoding != NULL)
            xmlFree((xmlChar *) ctxt->encoding);
        ctxt->encoding = xmlStrdup((const xmlChar *) encoding);
    }
    if (options & XML_PARSE_RECOVER) {
        ctxt->recovery = 1;
        options -= XML_PARSE_RECOVER;
        ctxt->options |= XML_PARSE_RECOVER;
    } else
        ctxt->recovery = 0;
    if (options & XML_PARSE_DTDLOAD) {
        ctxt->loadsubset = XML_DETECT_IDS;
        options -= XML_PARSE_DTDLOAD;
        ctxt->options |= XML_PARSE_DTDLOAD;
    } else
        ctxt->loadsubset = 0;
    if (options & XML_PARSE_DTDATTR) {
        ctxt->loadsubset |= XML_COMPLETE_ATTRS;
        options -= XML_PARSE_DTDATTR;
        ctxt->options |= XML_PARSE_DTDATTR;
    }
    if (options & XML_PARSE_NOENT) {
        ctxt->replaceEntities = 1;
        /* ctxt->loadsubset |= XML_DETECT_IDS; */
        options -= XML_PARSE_NOENT;
        ctxt->options |= XML_PARSE_NOENT;
    } else
        ctxt->replaceEntities = 0;
    if (options & XML_PARSE_PEDANTIC) {
        ctxt->pedantic = 1;
        options -= XML_PARSE_PEDANTIC;
        ctxt->options |= XML_PARSE_PEDANTIC;
    } else
        ctxt->pedantic = 0;
    if (options & XML_PARSE_NOBLANKS) {
        ctxt->keepBlanks = 0;
        ctxt->sax->ignorableWhitespace = xmlSAX2IgnorableWhitespace;
        options -= XML_PARSE_NOBLANKS;
        ctxt->options |= XML_PARSE_NOBLANKS;
    } else
        ctxt->keepBlanks = 1;
    if (options & XML_PARSE_DTDVALID) {
        ctxt->validate = 1;
        if (options & XML_PARSE_NOWARNING)
            ctxt->vctxt.warning = NULL;
        if (options & XML_PARSE_NOERROR)
            ctxt->vctxt.error = NULL;
        options -= XML_PARSE_DTDVALID;
        ctxt->options |= XML_PARSE_DTDVALID;
    } else
        ctxt->validate = 0;
    if (options & XML_PARSE_NOWARNING) {
        ctxt->sax->warning = NULL;
        options -= XML_PARSE_NOWARNING;
    }
    if (options & XML_PARSE_NOERROR) {
        ctxt->sax->error = NULL;
        ctxt->sax->fatalError = NULL;
        options -= XML_PARSE_NOERROR;
    }
#ifdef LIBXML_SAX1_ENABLED
    if (options & XML_PARSE_SAX1) {
        ctxt->sax->startElement = xmlSAX2StartElement;
        ctxt->sax->endElement = xmlSAX2EndElement;
        ctxt->sax->startElementNs = NULL;
        ctxt->sax->endElementNs = NULL;
        ctxt->sax->initialized = 1;
        options -= XML_PARSE_SAX1;
        ctxt->options |= XML_PARSE_SAX1;
    }
#endif /* LIBXML_SAX1_ENABLED */
    if (options & XML_PARSE_NODICT) {
        ctxt->dictNames = 0;
        options -= XML_PARSE_NODICT;
        ctxt->options |= XML_PARSE_NODICT;
    } else {
        ctxt->dictNames = 1;
    }
    if (options & XML_PARSE_NOCDATA) {
        ctxt->sax->cdataBlock = NULL;
        options -= XML_PARSE_NOCDATA;
        ctxt->options |= XML_PARSE_NOCDATA;
    }
    if (options & XML_PARSE_NSCLEAN) {
        ctxt->options |= XML_PARSE_NSCLEAN;
        options -= XML_PARSE_NSCLEAN;
    }
    if (options & XML_PARSE_NONET) {
        ctxt->options |= XML_PARSE_NONET;
        options -= XML_PARSE_NONET;
    }
    if (options & XML_PARSE_COMPACT) {
        ctxt->options |= XML_PARSE_COMPACT;
        options -= XML_PARSE_COMPACT;
    }
    if (options & XML_PARSE_OLD10) {
        ctxt->options |= XML_PARSE_OLD10;
        options -= XML_PARSE_OLD10;
    }
    if (options & XML_PARSE_NOBASEFIX) {
        ctxt->options |= XML_PARSE_NOBASEFIX;
        options -= XML_PARSE_NOBASEFIX;
    }
    if (options & XML_PARSE_HUGE) {
        ctxt->options |= XML_PARSE_HUGE;
        options -= XML_PARSE_HUGE;
    }
    if (options & XML_PARSE_OLDSAX) {
        ctxt->options |= XML_PARSE_OLDSAX;
        options -= XML_PARSE_OLDSAX;
    }
    ctxt->linenumbers = 1;
    return (options);
}

/**
 * xmlCtxtUseOptions:
 * @ctxt: an XML parser context
 * @options:  a combination of xmlParserOption
 *
 * Applies the options to the parser context
 *
 * Returns 0 in case of success, the set of unknown or unimplemented options
 *         in case of error.
 */
int
xmlCtxtUseOptions(xmlParserCtxtPtr ctxt, int options)
{
   return(xmlCtxtUseOptionsInternal(ctxt, options, NULL));
}

/**
 * xmlDoRead:
 * @ctxt:  an XML parser context
 * @URL:  the base URL to use for the document
 * @encoding:  the document encoding, or NULL
 * @options:  a combination of xmlParserOption
 * @reuse:  keep the context for reuse
 *
 * Common front-end for the xmlRead functions
 *
 * Returns the resulting document tree or NULL
 */
static xmlDocPtr
xmlDoRead(xmlParserCtxtPtr ctxt, const char *URL, const char *encoding,
          int options, int reuse)
{
    xmlDocPtr ret;

    xmlCtxtUseOptionsInternal(ctxt, options, encoding);
    if (encoding != NULL) {
        xmlCharEncodingHandlerPtr hdlr;

        hdlr = xmlFindCharEncodingHandler(encoding);
        if (hdlr != NULL)
            xmlSwitchToEncoding(ctxt, hdlr);
    }
    if ((URL != NULL) && (ctxt->input != NULL) &&
        (ctxt->input->filename == NULL))
        ctxt->input->filename = (char *) xmlStrdup((const xmlChar *) URL);
    xmlParseDocument(ctxt);
    if ((ctxt->wellFormed) || ctxt->recovery)
        ret = ctxt->myDoc;
    else {
        ret = NULL;
        if (ctxt->myDoc != NULL) {
            xmlFreeDoc(ctxt->myDoc);
        }
    }
    ctxt->myDoc = NULL;
    if (!reuse) {
        xmlFreeParserCtxt(ctxt);
    }

    return (ret);
}

/**
 * xmlReadDoc:
 * @cur:  a pointer to a zero terminated string
 * @URL:  the base URL to use for the document
 * @encoding:  the document encoding, or NULL
 * @options:  a combination of xmlParserOption
 *
 * parse an XML in-memory document and build a tree.
 * 
 * Returns the resulting document tree
 */
xmlDocPtr
xmlReadDoc(const xmlChar * cur, const char *URL, const char *encoding, int options)
{
    xmlParserCtxtPtr ctxt;

    if (cur == NULL)
        return (NULL);

    ctxt = xmlCreateDocParserCtxt(cur);
    if (ctxt == NULL)
        return (NULL);
    return (xmlDoRead(ctxt, URL, encoding, options, 0));
}

/**
 * xmlReadFile:
 * @filename:  a file or URL
 * @encoding:  the document encoding, or NULL
 * @options:  a combination of xmlParserOption
 *
 * parse an XML file from the filesystem or the network.
 * 
 * Returns the resulting document tree
 */
xmlDocPtr
xmlReadFile(const char *filename, const char *encoding, int options)
{
    xmlParserCtxtPtr ctxt;

    ctxt = xmlCreateURLParserCtxt(filename, options);
    if (ctxt == NULL)
        return (NULL);
    return (xmlDoRead(ctxt, NULL, encoding, options, 0));
}

/**
 * xmlReadMemory:
 * @buffer:  a pointer to a char array
 * @size:  the size of the array
 * @URL:  the base URL to use for the document
 * @encoding:  the document encoding, or NULL
 * @options:  a combination of xmlParserOption
 *
 * parse an XML in-memory document and build a tree.
 * 
 * Returns the resulting document tree
 */
xmlDocPtr
xmlReadMemory(const char *buffer, int size, const char *URL, const char *encoding, int options)
{
    xmlParserCtxtPtr ctxt;

    ctxt = xmlCreateMemoryParserCtxt(buffer, size);
    if (ctxt == NULL)
        return (NULL);
    return (xmlDoRead(ctxt, URL, encoding, options, 0));
}

/**
 * xmlReadFd:
 * @fd:  an open file descriptor
 * @URL:  the base URL to use for the document
 * @encoding:  the document encoding, or NULL
 * @options:  a combination of xmlParserOption
 *
 * parse an XML from a file descriptor and build a tree.
 * NOTE that the file descriptor will not be closed when the
 *      reader is closed or reset.
 * 
 * Returns the resulting document tree
 */
xmlDocPtr
xmlReadFd(int fd, const char *URL, const char *encoding, int options)
{
    xmlParserCtxtPtr ctxt;
    xmlParserInputBufferPtr input;
    xmlParserInputPtr stream;

    if (fd < 0)
        return (NULL);

    input = xmlParserInputBufferCreateFd(fd, XML_CHAR_ENCODING_NONE);
    if (input == NULL)
        return (NULL);
    input->closecallback = NULL;
    ctxt = xmlNewParserCtxt();
    if (ctxt == NULL) {
        xmlFreeParserInputBuffer(input);
        return (NULL);
    }
    stream = xmlNewIOInputStream(ctxt, input, XML_CHAR_ENCODING_NONE);
    if (stream == NULL) {
        xmlFreeParserInputBuffer(input);
        xmlFreeParserCtxt(ctxt);
        return (NULL);
    }
    inputPush(ctxt, stream);
    return (xmlDoRead(ctxt, URL, encoding, options, 0));
}

/**
 * xmlReadIO:
 * @ioread:  an I/O read function
 * @ioclose:  an I/O close function
 * @ioctx:  an I/O handler
 * @URL:  the base URL to use for the document
 * @encoding:  the document encoding, or NULL
 * @options:  a combination of xmlParserOption
 *
 * parse an XML document from I/O functions and source and build a tree.
 * 
 * Returns the resulting document tree
 */
xmlDocPtr
xmlReadIO(xmlInputReadCallback ioread, xmlInputCloseCallback ioclose,
          void *ioctx, const char *URL, const char *encoding, int options)
{
    xmlParserCtxtPtr ctxt;
    xmlParserInputBufferPtr input;
    xmlParserInputPtr stream;

    if (ioread == NULL)
        return (NULL);

    input = xmlParserInputBufferCreateIO(ioread, ioclose, ioctx,
                                         XML_CHAR_ENCODING_NONE);
    if (input == NULL)
        return (NULL);
    ctxt = xmlNewParserCtxt();
    if (ctxt == NULL) {
        xmlFreeParserInputBuffer(input);
        return (NULL);
    }
    stream = xmlNewIOInputStream(ctxt, input, XML_CHAR_ENCODING_NONE);
    if (stream == NULL) {
        xmlFreeParserInputBuffer(input);
        xmlFreeParserCtxt(ctxt);
        return (NULL);
    }
    inputPush(ctxt, stream);
    return (xmlDoRead(ctxt, URL, encoding, options, 0));
}

/**
 * xmlCtxtReadDoc:
 * @ctxt:  an XML parser context
 * @cur:  a pointer to a zero terminated string
 * @URL:  the base URL to use for the document
 * @encoding:  the document encoding, or NULL
 * @options:  a combination of xmlParserOption
 *
 * parse an XML in-memory document and build a tree.
 * This reuses the existing @ctxt parser context
 * 
 * Returns the resulting document tree
 */
xmlDocPtr
xmlCtxtReadDoc(xmlParserCtxtPtr ctxt, const xmlChar * cur,
               const char *URL, const char *encoding, int options)
{
    xmlParserInputPtr stream;

    if (cur == NULL)
        return (NULL);
    if (ctxt == NULL)
        return (NULL);

    xmlCtxtReset(ctxt);

    stream = xmlNewStringInputStream(ctxt, cur);
    if (stream == NULL) {
        return (NULL);
    }
    inputPush(ctxt, stream);
    return (xmlDoRead(ctxt, URL, encoding, options, 1));
}

/**
 * xmlCtxtReadFile:
 * @ctxt:  an XML parser context
 * @filename:  a file or URL
 * @encoding:  the document encoding, or NULL
 * @options:  a combination of xmlParserOption
 *
 * parse an XML file from the filesystem or the network.
 * This reuses the existing @ctxt parser context
 * 
 * Returns the resulting document tree
 */
xmlDocPtr
xmlCtxtReadFile(xmlParserCtxtPtr ctxt, const char *filename,
                const char *encoding, int options)
{
    xmlParserInputPtr stream;

    if (filename == NULL)
        return (NULL);
    if (ctxt == NULL)
        return (NULL);

    xmlCtxtReset(ctxt);

    stream = xmlLoadExternalEntity(filename, NULL, ctxt);
    if (stream == NULL) {
        return (NULL);
    }
    inputPush(ctxt, stream);
    return (xmlDoRead(ctxt, NULL, encoding, options, 1));
}

/**
 * xmlCtxtReadMemory:
 * @ctxt:  an XML parser context
 * @buffer:  a pointer to a char array
 * @size:  the size of the array
 * @URL:  the base URL to use for the document
 * @encoding:  the document encoding, or NULL
 * @options:  a combination of xmlParserOption
 *
 * parse an XML in-memory document and build a tree.
 * This reuses the existing @ctxt parser context
 * 
 * Returns the resulting document tree
 */
xmlDocPtr
xmlCtxtReadMemory(xmlParserCtxtPtr ctxt, const char *buffer, int size,
                  const char *URL, const char *encoding, int options)
{
    xmlParserInputBufferPtr input;
    xmlParserInputPtr stream;

    if (ctxt == NULL)
        return (NULL);
    if (buffer == NULL)
        return (NULL);

    xmlCtxtReset(ctxt);

    input = xmlParserInputBufferCreateMem(buffer, size, XML_CHAR_ENCODING_NONE);
    if (input == NULL) {
        return(NULL);
    }

    stream = xmlNewIOInputStream(ctxt, input, XML_CHAR_ENCODING_NONE);
    if (stream == NULL) {
        xmlFreeParserInputBuffer(input);
        return(NULL);
    }

    inputPush(ctxt, stream);
    return (xmlDoRead(ctxt, URL, encoding, options, 1));
}

/**
 * xmlCtxtReadFd:
 * @ctxt:  an XML parser context
 * @fd:  an open file descriptor
 * @URL:  the base URL to use for the document
 * @encoding:  the document encoding, or NULL
 * @options:  a combination of xmlParserOption
 *
 * parse an XML from a file descriptor and build a tree.
 * This reuses the existing @ctxt parser context
 * NOTE that the file descriptor will not be closed when the
 *      reader is closed or reset.
 * 
 * Returns the resulting document tree
 */
xmlDocPtr
xmlCtxtReadFd(xmlParserCtxtPtr ctxt, int fd,
              const char *URL, const char *encoding, int options)
{
    xmlParserInputBufferPtr input;
    xmlParserInputPtr stream;

    if (fd < 0)
        return (NULL);
    if (ctxt == NULL)
        return (NULL);

    xmlCtxtReset(ctxt);


    input = xmlParserInputBufferCreateFd(fd, XML_CHAR_ENCODING_NONE);
    if (input == NULL)
        return (NULL);
    input->closecallback = NULL;
    stream = xmlNewIOInputStream(ctxt, input, XML_CHAR_ENCODING_NONE);
    if (stream == NULL) {
        xmlFreeParserInputBuffer(input);
        return (NULL);
    }
    inputPush(ctxt, stream);
    return (xmlDoRead(ctxt, URL, encoding, options, 1));
}

/**
 * xmlCtxtReadIO:
 * @ctxt:  an XML parser context
 * @ioread:  an I/O read function
 * @ioclose:  an I/O close function
 * @ioctx:  an I/O handler
 * @URL:  the base URL to use for the document
 * @encoding:  the document encoding, or NULL
 * @options:  a combination of xmlParserOption
 *
 * parse an XML document from I/O functions and source and build a tree.
 * This reuses the existing @ctxt parser context
 * 
 * Returns the resulting document tree
 */
xmlDocPtr
xmlCtxtReadIO(xmlParserCtxtPtr ctxt, xmlInputReadCallback ioread,
              xmlInputCloseCallback ioclose, void *ioctx,
              const char *URL,
              const char *encoding, int options)
{
    xmlParserInputBufferPtr input;
    xmlParserInputPtr stream;

    if (ioread == NULL)
        return (NULL);
    if (ctxt == NULL)
        return (NULL);

    xmlCtxtReset(ctxt);

    input = xmlParserInputBufferCreateIO(ioread, ioclose, ioctx,
                                         XML_CHAR_ENCODING_NONE);
    if (input == NULL)
        return (NULL);
    stream = xmlNewIOInputStream(ctxt, input, XML_CHAR_ENCODING_NONE);
    if (stream == NULL) {
        xmlFreeParserInputBuffer(input);
        return (NULL);
    }
    inputPush(ctxt, stream);
    return (xmlDoRead(ctxt, URL, encoding, options, 1));
}

#define bottom_parser
#include "elfgcchack.h"