third_party/libxml/src/xmlsave.c

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This source file includes following definitions.
xmlIsXHTML
xmlSaveErrMemory
xmlSaveErr
xmlSerializeHexCharRef
xmlEscapeEntities
xmlSaveCtxtInit
xmlFreeSaveCtxt
xmlNewSaveCtxt
xmlAttrSerializeContent
xmlSaveSwitchEncoding
xmlSaveClearEncoding
xmlNsDumpOutput
xmlNsListDumpOutput
xmlDtdDumpOutput
xmlAttrDumpOutput
xmlAttrListDumpOutput
xmlNodeListDumpOutput
htmlNodeDumpOutputInternal
xmlNodeDumpOutputInternal
xmlDocContentDumpOutput
xhtmlIsEmpty
xhtmlAttrListDumpOutput
xhtmlNodeListDumpOutput
xhtmlNodeDumpOutput
xmlSaveToFd
xmlSaveToFilename
xmlSaveToBuffer
xmlSaveToIO
xmlSaveDoc
xmlSaveTree
xmlSaveFlush
xmlSaveClose
xmlSaveSetEscape
xmlSaveSetAttrEscape
xmlAttrSerializeTxtContent
xmlNodeDump
xmlElemDump
xmlNodeDumpOutput
xmlDocDumpFormatMemoryEnc
xmlDocDumpMemory
xmlDocDumpFormatMemory
xmlDocDumpMemoryEnc
xmlDocFormatDump
xmlDocDump
xmlSaveFileTo
xmlSaveFormatFileTo
xmlSaveFormatFileEnc
xmlSaveFileEnc
xmlSaveFormatFile
xmlSaveFile
/*
 * xmlsave.c: Implemetation of the document serializer
 *
 * See Copyright for the status of this software.
 *
 * daniel@veillard.com
 */

#define IN_LIBXML
#include "libxml.h"

#include <string.h>
#include <libxml/xmlmemory.h>
#include <libxml/parserInternals.h>
#include <libxml/tree.h>
#include <libxml/xmlsave.h>

#define MAX_INDENT 60

#include <libxml/HTMLtree.h>

/************************************************************************
 *                                                                      *
 *                      XHTML detection                                 *
 *                                                                      *
 ************************************************************************/
#define XHTML_STRICT_PUBLIC_ID BAD_CAST \
   "-//W3C//DTD XHTML 1.0 Strict//EN"
#define XHTML_STRICT_SYSTEM_ID BAD_CAST \
   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"
#define XHTML_FRAME_PUBLIC_ID BAD_CAST \
   "-//W3C//DTD XHTML 1.0 Frameset//EN"
#define XHTML_FRAME_SYSTEM_ID BAD_CAST \
   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd"
#define XHTML_TRANS_PUBLIC_ID BAD_CAST \
   "-//W3C//DTD XHTML 1.0 Transitional//EN"
#define XHTML_TRANS_SYSTEM_ID BAD_CAST \
   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"

#define XHTML_NS_NAME BAD_CAST "http://www.w3.org/1999/xhtml"
/**
 * xmlIsXHTML:
 * @systemID:  the system identifier
 * @publicID:  the public identifier
 *
 * Try to find if the document correspond to an XHTML DTD
 *
 * Returns 1 if true, 0 if not and -1 in case of error
 */
int
xmlIsXHTML(const xmlChar *systemID, const xmlChar *publicID) {
    if ((systemID == NULL) && (publicID == NULL))
        return(-1);
    if (publicID != NULL) {
        if (xmlStrEqual(publicID, XHTML_STRICT_PUBLIC_ID)) return(1);
        if (xmlStrEqual(publicID, XHTML_FRAME_PUBLIC_ID)) return(1);
        if (xmlStrEqual(publicID, XHTML_TRANS_PUBLIC_ID)) return(1);
    }
    if (systemID != NULL) {
        if (xmlStrEqual(systemID, XHTML_STRICT_SYSTEM_ID)) return(1);
        if (xmlStrEqual(systemID, XHTML_FRAME_SYSTEM_ID)) return(1);
        if (xmlStrEqual(systemID, XHTML_TRANS_SYSTEM_ID)) return(1);
    }
    return(0);
}

#ifdef LIBXML_OUTPUT_ENABLED

#define TODO                                                            \
    xmlGenericError(xmlGenericErrorContext,                             \
            "Unimplemented block at %s:%d\n",                           \
            __FILE__, __LINE__);

struct _xmlSaveCtxt {
    void *_private;
    int type;
    int fd;
    const xmlChar *filename;
    const xmlChar *encoding;
    xmlCharEncodingHandlerPtr handler;
    xmlOutputBufferPtr buf;
    xmlDocPtr doc;
    int options;
    int level;
    int format;
    char indent[MAX_INDENT + 1];        /* array for indenting output */
    int indent_nr;
    int indent_size;
    xmlCharEncodingOutputFunc escape;   /* used for element content */
    xmlCharEncodingOutputFunc escapeAttr;/* used for attribute content */
};

/************************************************************************
 *                                                                      *
 *                      Output error handlers                           *
 *                                                                      *
 ************************************************************************/
/**
 * xmlSaveErrMemory:
 * @extra:  extra informations
 *
 * Handle an out of memory condition
 */
static void
xmlSaveErrMemory(const char *extra)
{
    __xmlSimpleError(XML_FROM_OUTPUT, XML_ERR_NO_MEMORY, NULL, NULL, extra);
}

/**
 * xmlSaveErr:
 * @code:  the error number
 * @node:  the location of the error.
 * @extra:  extra informations
 *
 * Handle an out of memory condition
 */
static void
xmlSaveErr(int code, xmlNodePtr node, const char *extra)
{
    const char *msg = NULL;

    switch(code) {
        case XML_SAVE_NOT_UTF8:
            msg = "string is not in UTF-8\n";
            break;
        case XML_SAVE_CHAR_INVALID:
            msg = "invalid character value\n";
            break;
        case XML_SAVE_UNKNOWN_ENCODING:
            msg = "unknown encoding %s\n";
            break;
        case XML_SAVE_NO_DOCTYPE:
            msg = "document has no DOCTYPE\n";
            break;
        default:
            msg = "unexpected error number\n";
    }
    __xmlSimpleError(XML_FROM_OUTPUT, code, node, msg, extra);
}

/************************************************************************
 *                                                                      *
 *                      Special escaping routines                       *
 *                                                                      *
 ************************************************************************/
static unsigned char *
xmlSerializeHexCharRef(unsigned char *out, int val) {
    unsigned char *ptr;

    *out++ = '&';
    *out++ = '#';
    *out++ = 'x';
    if (val < 0x10) ptr = out;
    else if (val < 0x100) ptr = out + 1;
    else if (val < 0x1000) ptr = out + 2;
    else if (val < 0x10000) ptr = out + 3;
    else if (val < 0x100000) ptr = out + 4;
    else ptr = out + 5;
    out = ptr + 1;
    while (val > 0) {
        switch (val & 0xF) {
            case 0: *ptr-- = '0'; break;
            case 1: *ptr-- = '1'; break;
            case 2: *ptr-- = '2'; break;
            case 3: *ptr-- = '3'; break;
            case 4: *ptr-- = '4'; break;
            case 5: *ptr-- = '5'; break;
            case 6: *ptr-- = '6'; break;
            case 7: *ptr-- = '7'; break;
            case 8: *ptr-- = '8'; break;
            case 9: *ptr-- = '9'; break;
            case 0xA: *ptr-- = 'A'; break;
            case 0xB: *ptr-- = 'B'; break;
            case 0xC: *ptr-- = 'C'; break;
            case 0xD: *ptr-- = 'D'; break;
            case 0xE: *ptr-- = 'E'; break;
            case 0xF: *ptr-- = 'F'; break;
            default: *ptr-- = '0'; break;
        }
        val >>= 4;
    }
    *out++ = ';';
    *out = 0;
    return(out);
}

/**
 * xmlEscapeEntities:
 * @out:  a pointer to an array of bytes to store the result
 * @outlen:  the length of @out
 * @in:  a pointer to an array of unescaped UTF-8 bytes
 * @inlen:  the length of @in
 *
 * Take a block of UTF-8 chars in and escape them. Used when there is no
 * encoding specified.
 *
 * Returns 0 if success, or -1 otherwise
 * The value of @inlen after return is the number of octets consumed
 *     if the return value is positive, else unpredictable.
 * The value of @outlen after return is the number of octets consumed.
 */
static int
xmlEscapeEntities(unsigned char* out, int *outlen,
                 const xmlChar* in, int *inlen) {
    unsigned char* outstart = out;
    const unsigned char* base = in;
    unsigned char* outend = out + *outlen;
    const unsigned char* inend;
    int val;

    inend = in + (*inlen);
    
    while ((in < inend) && (out < outend)) {
        if (*in == '<') {
            if (outend - out < 4) break;
            *out++ = '&';
            *out++ = 'l';
            *out++ = 't';
            *out++ = ';';
            in++;
            continue;
        } else if (*in == '>') {
            if (outend - out < 4) break;
            *out++ = '&';
            *out++ = 'g';
            *out++ = 't';
            *out++ = ';';
            in++;
            continue;
        } else if (*in == '&') {
            if (outend - out < 5) break;
            *out++ = '&';
            *out++ = 'a';
            *out++ = 'm';
            *out++ = 'p';
            *out++ = ';';
            in++;
            continue;
        } else if (((*in >= 0x20) && (*in < 0x80)) ||
                   (*in == '\n') || (*in == '\t')) {
            /*
             * default case, just copy !
             */
            *out++ = *in++;
            continue;
        } else if (*in >= 0x80) {
            /*
             * We assume we have UTF-8 input.
             */
            if (outend - out < 11) break;

            if (*in < 0xC0) {
                xmlSaveErr(XML_SAVE_NOT_UTF8, NULL, NULL);
                in++;
                goto error;
            } else if (*in < 0xE0) {
                if (inend - in < 2) break;
                val = (in[0]) & 0x1F;
                val <<= 6;
                val |= (in[1]) & 0x3F;
                in += 2;
            } else if (*in < 0xF0) {
                if (inend - in < 3) break;
                val = (in[0]) & 0x0F;
                val <<= 6;
                val |= (in[1]) & 0x3F;
                val <<= 6;
                val |= (in[2]) & 0x3F;
                in += 3;
            } else if (*in < 0xF8) {
                if (inend - in < 4) break;
                val = (in[0]) & 0x07;
                val <<= 6;
                val |= (in[1]) & 0x3F;
                val <<= 6;
                val |= (in[2]) & 0x3F;
                val <<= 6;
                val |= (in[3]) & 0x3F;
                in += 4;
            } else {
                xmlSaveErr(XML_SAVE_CHAR_INVALID, NULL, NULL);
                in++;
                goto error;
            }
            if (!IS_CHAR(val)) {
                xmlSaveErr(XML_SAVE_CHAR_INVALID, NULL, NULL);
                in++;
                goto error;
            }

            /*
             * We could do multiple things here. Just save as a char ref
             */
            out = xmlSerializeHexCharRef(out, val);
        } else if (IS_BYTE_CHAR(*in)) {
            if (outend - out < 6) break;
            out = xmlSerializeHexCharRef(out, *in++);
        } else {
            xmlGenericError(xmlGenericErrorContext,
                "xmlEscapeEntities : char out of range\n");
            in++;
            goto error;
        }
    }
    *outlen = out - outstart;
    *inlen = in - base;
    return(0);
error:
    *outlen = out - outstart;
    *inlen = in - base;
    return(-1);
}

/************************************************************************
 *                                                                      *
 *                      Allocation and deallocation                     *
 *                                                                      *
 ************************************************************************/
/**
 * xmlSaveCtxtInit:
 * @ctxt: the saving context
 *
 * Initialize a saving context
 */
static void
xmlSaveCtxtInit(xmlSaveCtxtPtr ctxt)
{
    int i;
    int len;

    if (ctxt == NULL) return;
    if ((ctxt->encoding == NULL) && (ctxt->escape == NULL))
        ctxt->escape = xmlEscapeEntities;
    len = xmlStrlen((xmlChar *)xmlTreeIndentString);
    if ((xmlTreeIndentString == NULL) || (len == 0)) {
        memset(&ctxt->indent[0], 0, MAX_INDENT + 1);
    } else {
        ctxt->indent_size = len;
        ctxt->indent_nr = MAX_INDENT / ctxt->indent_size;
        for (i = 0;i < ctxt->indent_nr;i++)
            memcpy(&ctxt->indent[i * ctxt->indent_size], xmlTreeIndentString,
                   ctxt->indent_size);
        ctxt->indent[ctxt->indent_nr * ctxt->indent_size] = 0;
    }

    if (xmlSaveNoEmptyTags) {
        ctxt->options |= XML_SAVE_NO_EMPTY;
    }
}

/**
 * xmlFreeSaveCtxt:
 *
 * Free a saving context, destroying the ouptut in any remaining buffer
 */
static void
xmlFreeSaveCtxt(xmlSaveCtxtPtr ctxt)
{
    if (ctxt == NULL) return;
    if (ctxt->encoding != NULL)
        xmlFree((char *) ctxt->encoding);
    if (ctxt->buf != NULL)
        xmlOutputBufferClose(ctxt->buf);
    xmlFree(ctxt);
}

/**
 * xmlNewSaveCtxt:
 *
 * Create a new saving context
 *
 * Returns the new structure or NULL in case of error
 */
static xmlSaveCtxtPtr
xmlNewSaveCtxt(const char *encoding, int options)
{
    xmlSaveCtxtPtr ret;

    ret = (xmlSaveCtxtPtr) xmlMalloc(sizeof(xmlSaveCtxt));
    if (ret == NULL) {
        xmlSaveErrMemory("creating saving context");
        return ( NULL );
    }
    memset(ret, 0, sizeof(xmlSaveCtxt));

    if (encoding != NULL) {
        ret->handler = xmlFindCharEncodingHandler(encoding);
        if (ret->handler == NULL) {
            xmlSaveErr(XML_SAVE_UNKNOWN_ENCODING, NULL, encoding);
            xmlFreeSaveCtxt(ret);
            return(NULL);
        }
        ret->encoding = xmlStrdup((const xmlChar *)encoding);
        ret->escape = NULL;
    }
    xmlSaveCtxtInit(ret);

    /*
     * Use the options
     */

    /* Re-check this option as it may already have been set */
    if ((ret->options & XML_SAVE_NO_EMPTY) && ! (options & XML_SAVE_NO_EMPTY)) {
        options |= XML_SAVE_NO_EMPTY;
    }

    ret->options = options;
    if (options & XML_SAVE_FORMAT)
        ret->format = 1;

    return(ret);
}

/************************************************************************
 *                                                                      *
 *              Dumping XML tree content to a simple buffer             *
 *                                                                      *
 ************************************************************************/
/**
 * xmlAttrSerializeContent:
 * @buf:  the XML buffer output
 * @doc:  the document
 * @attr:  the attribute pointer
 *
 * Serialize the attribute in the buffer
 */
static void
xmlAttrSerializeContent(xmlOutputBufferPtr buf, xmlAttrPtr attr)
{
    xmlNodePtr children;

    children = attr->children;
    while (children != NULL) {
        switch (children->type) {
            case XML_TEXT_NODE:
                xmlAttrSerializeTxtContent(buf->buffer, attr->doc,
                                           attr, children->content);
                break;
            case XML_ENTITY_REF_NODE:
                xmlBufferAdd(buf->buffer, BAD_CAST "&", 1);
                xmlBufferAdd(buf->buffer, children->name,
                             xmlStrlen(children->name));
                xmlBufferAdd(buf->buffer, BAD_CAST ";", 1);
                break;
            default:
                /* should not happen unless we have a badly built tree */
                break;
        }
        children = children->next;
    }
}

/************************************************************************
 *                                                                      *
 *              Dumping XML tree content to an I/O output buffer        *
 *                                                                      *
 ************************************************************************/

static int xmlSaveSwitchEncoding(xmlSaveCtxtPtr ctxt, const char *encoding) {
    xmlOutputBufferPtr buf = ctxt->buf;

    if ((encoding != NULL) && (buf->encoder == NULL) && (buf->conv == NULL)) {
        buf->encoder = xmlFindCharEncodingHandler((const char *)encoding);
        if (buf->encoder == NULL) {
            xmlSaveErr(XML_SAVE_UNKNOWN_ENCODING, NULL,
                       (const char *)encoding);
            return(-1);
        }
        buf->conv = xmlBufferCreate();
        if (buf->conv == NULL) {
            xmlCharEncCloseFunc(buf->encoder);
            xmlSaveErrMemory("creating encoding buffer");
            return(-1);
        }
        /*
         * initialize the state, e.g. if outputting a BOM
         */
        xmlCharEncOutFunc(buf->encoder, buf->conv, NULL);
    }
    return(0);
}

static int xmlSaveClearEncoding(xmlSaveCtxtPtr ctxt) {
    xmlOutputBufferPtr buf = ctxt->buf;
    xmlOutputBufferFlush(buf);
    xmlCharEncCloseFunc(buf->encoder);
    xmlBufferFree(buf->conv);
    buf->encoder = NULL;
    buf->conv = NULL;
    return(0);
}

#ifdef LIBXML_HTML_ENABLED
static void
xhtmlNodeDumpOutput(xmlSaveCtxtPtr ctxt, xmlNodePtr cur);
#endif
static void xmlNodeListDumpOutput(xmlSaveCtxtPtr ctxt, xmlNodePtr cur);
static void xmlNodeDumpOutputInternal(xmlSaveCtxtPtr ctxt, xmlNodePtr cur);
void xmlNsListDumpOutput(xmlOutputBufferPtr buf, xmlNsPtr cur);
static int xmlDocContentDumpOutput(xmlSaveCtxtPtr ctxt, xmlDocPtr cur);

/**
 * xmlNsDumpOutput:
 * @buf:  the XML buffer output
 * @cur:  a namespace
 *
 * Dump a local Namespace definition.
 * Should be called in the context of attributes dumps.
 */
static void
xmlNsDumpOutput(xmlOutputBufferPtr buf, xmlNsPtr cur) {
    if ((cur == NULL) || (buf == NULL)) return;
    if ((cur->type == XML_LOCAL_NAMESPACE) && (cur->href != NULL)) {
        if (xmlStrEqual(cur->prefix, BAD_CAST "xml"))
            return;

        /* Within the context of an element attributes */
        if (cur->prefix != NULL) {
            xmlOutputBufferWrite(buf, 7, " xmlns:");
            xmlOutputBufferWriteString(buf, (const char *)cur->prefix);
        } else
            xmlOutputBufferWrite(buf, 6, " xmlns");
        xmlOutputBufferWrite(buf, 1, "=");
        xmlBufferWriteQuotedString(buf->buffer, cur->href);
    }
}

/**
 * xmlNsListDumpOutput:
 * @buf:  the XML buffer output
 * @cur:  the first namespace
 *
 * Dump a list of local Namespace definitions.
 * Should be called in the context of attributes dumps.
 */
void
xmlNsListDumpOutput(xmlOutputBufferPtr buf, xmlNsPtr cur) {
    while (cur != NULL) {
        xmlNsDumpOutput(buf, cur);
        cur = cur->next;
    }
}

/**
 * xmlDtdDumpOutput:
 * @buf:  the XML buffer output
 * @dtd:  the pointer to the DTD
 * 
 * Dump the XML document DTD, if any.
 */
static void
xmlDtdDumpOutput(xmlSaveCtxtPtr ctxt, xmlDtdPtr dtd) {
    xmlOutputBufferPtr buf;
    int format, level;
    xmlDocPtr doc;

    if (dtd == NULL) return;
    if ((ctxt == NULL) || (ctxt->buf == NULL))
        return;
    buf = ctxt->buf;
    xmlOutputBufferWrite(buf, 10, "<!DOCTYPE ");
    xmlOutputBufferWriteString(buf, (const char *)dtd->name);
    if (dtd->ExternalID != NULL) {
        xmlOutputBufferWrite(buf, 8, " PUBLIC ");
        xmlBufferWriteQuotedString(buf->buffer, dtd->ExternalID);
        xmlOutputBufferWrite(buf, 1, " ");
        xmlBufferWriteQuotedString(buf->buffer, dtd->SystemID);
    }  else if (dtd->SystemID != NULL) {
        xmlOutputBufferWrite(buf, 8, " SYSTEM ");
        xmlBufferWriteQuotedString(buf->buffer, dtd->SystemID);
    }
    if ((dtd->entities == NULL) && (dtd->elements == NULL) &&
        (dtd->attributes == NULL) && (dtd->notations == NULL) &&
        (dtd->pentities == NULL)) {
        xmlOutputBufferWrite(buf, 1, ">");
        return;
    }
    xmlOutputBufferWrite(buf, 3, " [\n");
    /*
     * Dump the notations first they are not in the DTD children list
     * Do this only on a standalone DTD or on the internal subset though.
     */
    if ((dtd->notations != NULL) && ((dtd->doc == NULL) ||
        (dtd->doc->intSubset == dtd))) {
        xmlDumpNotationTable(buf->buffer, (xmlNotationTablePtr) dtd->notations);
    }
    format = ctxt->format;
    level = ctxt->level;
    doc = ctxt->doc;
    ctxt->format = 0;
    ctxt->level = -1;
    ctxt->doc = dtd->doc;
    xmlNodeListDumpOutput(ctxt, dtd->children);
    ctxt->format = format;
    ctxt->level = level;
    ctxt->doc = doc;
    xmlOutputBufferWrite(buf, 2, "]>");
}

/**
 * xmlAttrDumpOutput:
 * @buf:  the XML buffer output
 * @cur:  the attribute pointer
 *
 * Dump an XML attribute
 */
static void
xmlAttrDumpOutput(xmlSaveCtxtPtr ctxt, xmlAttrPtr cur) {
    xmlOutputBufferPtr buf;

    if (cur == NULL) return;
    buf = ctxt->buf;
    if (buf == NULL) return;
    xmlOutputBufferWrite(buf, 1, " ");
    if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
        xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);
        xmlOutputBufferWrite(buf, 1, ":");
    }
    xmlOutputBufferWriteString(buf, (const char *)cur->name);
    xmlOutputBufferWrite(buf, 2, "=\"");
    xmlAttrSerializeContent(buf, cur);
    xmlOutputBufferWrite(buf, 1, "\"");
}

/**
 * xmlAttrListDumpOutput:
 * @buf:  the XML buffer output
 * @doc:  the document
 * @cur:  the first attribute pointer
 * @encoding:  an optional encoding string
 *
 * Dump a list of XML attributes
 */
static void
xmlAttrListDumpOutput(xmlSaveCtxtPtr ctxt, xmlAttrPtr cur) {
    if (cur == NULL) return;
    while (cur != NULL) {
        xmlAttrDumpOutput(ctxt, cur);
        cur = cur->next;
    }
}



/**
 * xmlNodeListDumpOutput:
 * @cur:  the first node
 *
 * Dump an XML node list, recursive behaviour, children are printed too.
 */
static void
xmlNodeListDumpOutput(xmlSaveCtxtPtr ctxt, xmlNodePtr cur) {
    xmlOutputBufferPtr buf;

    if (cur == NULL) return;
    buf = ctxt->buf;
    while (cur != NULL) {
        if ((ctxt->format) && (xmlIndentTreeOutput) &&
            ((cur->type == XML_ELEMENT_NODE) ||
             (cur->type == XML_COMMENT_NODE) ||
             (cur->type == XML_PI_NODE)))
            xmlOutputBufferWrite(buf, ctxt->indent_size *
                                 (ctxt->level > ctxt->indent_nr ? 
                                  ctxt->indent_nr : ctxt->level),
                                 ctxt->indent);
        xmlNodeDumpOutputInternal(ctxt, cur);
        if (ctxt->format) {
            xmlOutputBufferWrite(buf, 1, "\n");
        }
        cur = cur->next;
    }
}

#ifdef LIBXML_HTML_ENABLED
/**
 * xmlNodeDumpOutputInternal:
 * @cur:  the current node
 *
 * Dump an HTML node, recursive behaviour, children are printed too.
 */
static int
htmlNodeDumpOutputInternal(xmlSaveCtxtPtr ctxt, xmlNodePtr cur) {
    const xmlChar *oldenc = NULL;
    const xmlChar *oldctxtenc = ctxt->encoding;
    const xmlChar *encoding = ctxt->encoding;
    xmlOutputBufferPtr buf = ctxt->buf;
    int switched_encoding = 0;
    xmlDocPtr doc;

    xmlInitParser();

    doc = cur->doc;
    if (doc != NULL) {
        oldenc = doc->encoding;
        if (ctxt->encoding != NULL) {
            doc->encoding = BAD_CAST ctxt->encoding;
        } else if (doc->encoding != NULL) {
            encoding = doc->encoding;
        }
    }

    if ((encoding != NULL) && (doc != NULL))
        htmlSetMetaEncoding(doc, (const xmlChar *) encoding);
    if ((encoding == NULL) && (doc != NULL))
        encoding = htmlGetMetaEncoding(doc);
    if (encoding == NULL)
        encoding = BAD_CAST "HTML";
    if ((encoding != NULL) && (oldctxtenc == NULL) &&
        (buf->encoder == NULL) && (buf->conv == NULL)) {
        if (xmlSaveSwitchEncoding(ctxt, (const char*) encoding) < 0) {
            doc->encoding = oldenc;
            return(-1);
        }
        switched_encoding = 1;
    }
    if (ctxt->options & XML_SAVE_FORMAT)
        htmlNodeDumpFormatOutput(buf, doc, cur,
                                       (const char *)encoding, 1);
    else
        htmlNodeDumpFormatOutput(buf, doc, cur,
                                       (const char *)encoding, 0);
    /*
     * Restore the state of the saving context at the end of the document
     */
    if ((switched_encoding) && (oldctxtenc == NULL)) {
        xmlSaveClearEncoding(ctxt);
    }
    if (doc != NULL)
        doc->encoding = oldenc;
    return(0);
}
#endif

/**
 * xmlNodeDumpOutputInternal:
 * @cur:  the current node
 *
 * Dump an XML node, recursive behaviour, children are printed too.
 */
static void
xmlNodeDumpOutputInternal(xmlSaveCtxtPtr ctxt, xmlNodePtr cur) {
    int format;
    xmlNodePtr tmp;
    xmlChar *start, *end;
    xmlOutputBufferPtr buf;

    if (cur == NULL) return;
    buf = ctxt->buf;
    if (cur->type == XML_XINCLUDE_START)
        return;
    if (cur->type == XML_XINCLUDE_END)
        return;
    if ((cur->type == XML_DOCUMENT_NODE) ||
        (cur->type == XML_HTML_DOCUMENT_NODE)) {
        xmlDocContentDumpOutput(ctxt, (xmlDocPtr) cur);
        return;
    }
#ifdef LIBXML_HTML_ENABLED
    if (ctxt->options & XML_SAVE_XHTML) {
        xhtmlNodeDumpOutput(ctxt, cur);
        return;
    }
    if (((cur->type != XML_NAMESPACE_DECL) && (cur->doc != NULL) &&
         (cur->doc->type == XML_HTML_DOCUMENT_NODE) &&
         ((ctxt->options & XML_SAVE_AS_XML) == 0)) ||
        (ctxt->options & XML_SAVE_AS_HTML)) {
        htmlNodeDumpOutputInternal(ctxt, cur);
        return;
    }
#endif
    if (cur->type == XML_DTD_NODE) {
        xmlDtdDumpOutput(ctxt, (xmlDtdPtr) cur);
        return;
    }
    if (cur->type == XML_DOCUMENT_FRAG_NODE) {
        xmlNodeListDumpOutput(ctxt, cur->children);
        return;
    }
    if (cur->type == XML_ELEMENT_DECL) {
        xmlDumpElementDecl(buf->buffer, (xmlElementPtr) cur);
        return;
    }
    if (cur->type == XML_ATTRIBUTE_DECL) {
        xmlDumpAttributeDecl(buf->buffer, (xmlAttributePtr) cur);
        return;
    }
    if (cur->type == XML_ENTITY_DECL) {
        xmlDumpEntityDecl(buf->buffer, (xmlEntityPtr) cur);
        return;
    }
    if (cur->type == XML_TEXT_NODE) {
        if (cur->content != NULL) {
            if (cur->name != xmlStringTextNoenc) {
                xmlOutputBufferWriteEscape(buf, cur->content, ctxt->escape);
            } else {
                /*
                 * Disable escaping, needed for XSLT
                 */
                xmlOutputBufferWriteString(buf, (const char *) cur->content);
            }
        }

        return;
    }
    if (cur->type == XML_PI_NODE) {
        if (cur->content != NULL) {
            xmlOutputBufferWrite(buf, 2, "<?");
            xmlOutputBufferWriteString(buf, (const char *)cur->name);
            if (cur->content != NULL) {
                xmlOutputBufferWrite(buf, 1, " ");
                xmlOutputBufferWriteString(buf, (const char *)cur->content);
            }
            xmlOutputBufferWrite(buf, 2, "?>");
        } else {
            xmlOutputBufferWrite(buf, 2, "<?");
            xmlOutputBufferWriteString(buf, (const char *)cur->name);
            xmlOutputBufferWrite(buf, 2, "?>");
        }
        return;
    }
    if (cur->type == XML_COMMENT_NODE) {
        if (cur->content != NULL) {
            xmlOutputBufferWrite(buf, 4, "<!--");
            xmlOutputBufferWriteString(buf, (const char *)cur->content);
            xmlOutputBufferWrite(buf, 3, "-->");
        }
        return;
    }
    if (cur->type == XML_ENTITY_REF_NODE) {
        xmlOutputBufferWrite(buf, 1, "&");
        xmlOutputBufferWriteString(buf, (const char *)cur->name);
        xmlOutputBufferWrite(buf, 1, ";");
        return;
    }
    if (cur->type == XML_CDATA_SECTION_NODE) {
        if (cur->content == NULL || *cur->content == '\0') {
            xmlOutputBufferWrite(buf, 12, "<![CDATA[]]>");
        } else {
            start = end = cur->content;
            while (*end != '\0') {
                if ((*end == ']') && (*(end + 1) == ']') &&
                    (*(end + 2) == '>')) {
                    end = end + 2;
                    xmlOutputBufferWrite(buf, 9, "<![CDATA[");
                    xmlOutputBufferWrite(buf, end - start, (const char *)start);
                    xmlOutputBufferWrite(buf, 3, "]]>");
                    start = end;
                }
                end++;
            }
            if (start != end) {
                xmlOutputBufferWrite(buf, 9, "<![CDATA[");
                xmlOutputBufferWriteString(buf, (const char *)start);
                xmlOutputBufferWrite(buf, 3, "]]>");
            }
        }
        return;
    }
    if (cur->type == XML_ATTRIBUTE_NODE) {
        xmlAttrDumpOutput(ctxt, (xmlAttrPtr) cur);
        return;
    }
    if (cur->type == XML_NAMESPACE_DECL) {
        xmlNsDumpOutput(buf, (xmlNsPtr) cur);
        return;
    }

    format = ctxt->format;
    if (format == 1) {
        tmp = cur->children;
        while (tmp != NULL) {
            if ((tmp->type == XML_TEXT_NODE) ||
                (tmp->type == XML_CDATA_SECTION_NODE) ||
                (tmp->type == XML_ENTITY_REF_NODE)) {
                ctxt->format = 0;
                break;
            }
            tmp = tmp->next;
        }
    }
    xmlOutputBufferWrite(buf, 1, "<");
    if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
        xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);
        xmlOutputBufferWrite(buf, 1, ":");
    }

    xmlOutputBufferWriteString(buf, (const char *)cur->name);
    if (cur->nsDef)
        xmlNsListDumpOutput(buf, cur->nsDef);
    if (cur->properties != NULL)
        xmlAttrListDumpOutput(ctxt, cur->properties);

    if (((cur->type == XML_ELEMENT_NODE) || (cur->content == NULL)) &&
        (cur->children == NULL) && ((ctxt->options & XML_SAVE_NO_EMPTY) == 0)) {
        xmlOutputBufferWrite(buf, 2, "/>");
        ctxt->format = format;
        return;
    }
    xmlOutputBufferWrite(buf, 1, ">");
    if ((cur->type != XML_ELEMENT_NODE) && (cur->content != NULL)) {
        xmlOutputBufferWriteEscape(buf, cur->content, ctxt->escape);
    }
    if (cur->children != NULL) {
        if (ctxt->format) xmlOutputBufferWrite(buf, 1, "\n");
        if (ctxt->level >= 0) ctxt->level++;
        xmlNodeListDumpOutput(ctxt, cur->children);
        if (ctxt->level > 0) ctxt->level--;
        if ((xmlIndentTreeOutput) && (ctxt->format))
            xmlOutputBufferWrite(buf, ctxt->indent_size *
                                 (ctxt->level > ctxt->indent_nr ? 
                                  ctxt->indent_nr : ctxt->level),
                                 ctxt->indent);
    }
    xmlOutputBufferWrite(buf, 2, "</");
    if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
        xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);
        xmlOutputBufferWrite(buf, 1, ":");
    }

    xmlOutputBufferWriteString(buf, (const char *)cur->name);
    xmlOutputBufferWrite(buf, 1, ">");
    ctxt->format = format;
}

/**
 * xmlDocContentDumpOutput:
 * @cur:  the document
 *
 * Dump an XML document.
 */
static int
xmlDocContentDumpOutput(xmlSaveCtxtPtr ctxt, xmlDocPtr cur) {
#ifdef LIBXML_HTML_ENABLED
    xmlDtdPtr dtd;
    int is_xhtml = 0;
#endif
    const xmlChar *oldenc = cur->encoding;
    const xmlChar *oldctxtenc = ctxt->encoding;
    const xmlChar *encoding = ctxt->encoding;
    xmlCharEncodingOutputFunc oldescape = ctxt->escape;
    xmlCharEncodingOutputFunc oldescapeAttr = ctxt->escapeAttr;
    xmlOutputBufferPtr buf = ctxt->buf;
    xmlCharEncoding enc;
    int switched_encoding = 0;

    xmlInitParser();

    if ((cur->type != XML_HTML_DOCUMENT_NODE) &&
        (cur->type != XML_DOCUMENT_NODE))
         return(-1);

    if (ctxt->encoding != NULL) {
        cur->encoding = BAD_CAST ctxt->encoding;
    } else if (cur->encoding != NULL) {
        encoding = cur->encoding;
    } else if (cur->charset != XML_CHAR_ENCODING_UTF8) {
        encoding = (const xmlChar *)
                     xmlGetCharEncodingName((xmlCharEncoding) cur->charset);
    }

    if (((cur->type == XML_HTML_DOCUMENT_NODE) &&
         ((ctxt->options & XML_SAVE_AS_XML) == 0) &&
         ((ctxt->options & XML_SAVE_XHTML) == 0)) ||
        (ctxt->options & XML_SAVE_AS_HTML)) {
#ifdef LIBXML_HTML_ENABLED
        if (encoding != NULL)
            htmlSetMetaEncoding(cur, (const xmlChar *) encoding);
        if (encoding == NULL)
            encoding = htmlGetMetaEncoding(cur);
        if (encoding == NULL)
            encoding = BAD_CAST "HTML";
        if ((encoding != NULL) && (oldctxtenc == NULL) &&
            (buf->encoder == NULL) && (buf->conv == NULL)) {
            if (xmlSaveSwitchEncoding(ctxt, (const char*) encoding) < 0) {
                cur->encoding = oldenc;
                return(-1);
            }
        }
        if (ctxt->options & XML_SAVE_FORMAT)
            htmlDocContentDumpFormatOutput(buf, cur,
                                           (const char *)encoding, 1);
        else
            htmlDocContentDumpFormatOutput(buf, cur,
                                           (const char *)encoding, 0);
        if (ctxt->encoding != NULL)
            cur->encoding = oldenc;
        return(0);
#else
        return(-1);
#endif
    } else if ((cur->type == XML_DOCUMENT_NODE) ||
               (ctxt->options & XML_SAVE_AS_XML) ||
               (ctxt->options & XML_SAVE_XHTML)) {
        enc = xmlParseCharEncoding((const char*) encoding);
        if ((encoding != NULL) && (oldctxtenc == NULL) &&
            (buf->encoder == NULL) && (buf->conv == NULL) &&
            ((ctxt->options & XML_SAVE_NO_DECL) == 0)) {
            if ((enc != XML_CHAR_ENCODING_UTF8) &&
                (enc != XML_CHAR_ENCODING_NONE) &&
                (enc != XML_CHAR_ENCODING_ASCII)) {
                /*
                 * we need to switch to this encoding but just for this
                 * document since we output the XMLDecl the conversion
                 * must be done to not generate not well formed documents.
                 */
                if (xmlSaveSwitchEncoding(ctxt, (const char*) encoding) < 0) {
                    cur->encoding = oldenc;
                    return(-1);
                }
                switched_encoding = 1;
            }
            if (ctxt->escape == xmlEscapeEntities)
                ctxt->escape = NULL;
            if (ctxt->escapeAttr == xmlEscapeEntities)
                ctxt->escapeAttr = NULL;
        }


        /*
         * Save the XML declaration
         */
        if ((ctxt->options & XML_SAVE_NO_DECL) == 0) {
            xmlOutputBufferWrite(buf, 14, "<?xml version=");
            if (cur->version != NULL) 
                xmlBufferWriteQuotedString(buf->buffer, cur->version);
            else
                xmlOutputBufferWrite(buf, 5, "\"1.0\"");
            if (encoding != NULL) {
                xmlOutputBufferWrite(buf, 10, " encoding=");
                xmlBufferWriteQuotedString(buf->buffer, (xmlChar *) encoding);
            }
            switch (cur->standalone) {
                case 0:
                    xmlOutputBufferWrite(buf, 16, " standalone=\"no\"");
                    break;
                case 1:
                    xmlOutputBufferWrite(buf, 17, " standalone=\"yes\"");
                    break;
            }
            xmlOutputBufferWrite(buf, 3, "?>\n");
        }

#ifdef LIBXML_HTML_ENABLED
        if (ctxt->options & XML_SAVE_XHTML)
            is_xhtml = 1;
        if ((ctxt->options & XML_SAVE_NO_XHTML) == 0) {
            dtd = xmlGetIntSubset(cur);
            if (dtd != NULL) {
                is_xhtml = xmlIsXHTML(dtd->SystemID, dtd->ExternalID);
                if (is_xhtml < 0) is_xhtml = 0;
            }
        }
#endif
        if (cur->children != NULL) {
            xmlNodePtr child = cur->children;

            while (child != NULL) {
                ctxt->level = 0;
#ifdef LIBXML_HTML_ENABLED
                if (is_xhtml)
                    xhtmlNodeDumpOutput(ctxt, child);
                else
#endif
                    xmlNodeDumpOutputInternal(ctxt, child);
                xmlOutputBufferWrite(buf, 1, "\n");
                child = child->next;
            }
        }
    }

    /*
     * Restore the state of the saving context at the end of the document
     */
    if ((switched_encoding) && (oldctxtenc == NULL)) {
        xmlSaveClearEncoding(ctxt);
        ctxt->escape = oldescape;
        ctxt->escapeAttr = oldescapeAttr;
    }
    cur->encoding = oldenc;
    return(0);
}

#ifdef LIBXML_HTML_ENABLED
/************************************************************************
 *                                                                      *
 *              Functions specific to XHTML serialization               *
 *                                                                      *
 ************************************************************************/

/**
 * xhtmlIsEmpty:
 * @node:  the node
 *
 * Check if a node is an empty xhtml node
 *
 * Returns 1 if the node is an empty node, 0 if not and -1 in case of error
 */
static int
xhtmlIsEmpty(xmlNodePtr node) {
    if (node == NULL)
        return(-1);
    if (node->type != XML_ELEMENT_NODE)
        return(0);
    if ((node->ns != NULL) && (!xmlStrEqual(node->ns->href, XHTML_NS_NAME)))
        return(0);
    if (node->children != NULL)
        return(0);
    switch (node->name[0]) {
        case 'a':
            if (xmlStrEqual(node->name, BAD_CAST "area"))
                return(1);
            return(0);
        case 'b':
            if (xmlStrEqual(node->name, BAD_CAST "br"))
                return(1);
            if (xmlStrEqual(node->name, BAD_CAST "base"))
                return(1);
            if (xmlStrEqual(node->name, BAD_CAST "basefont"))
                return(1);
            return(0);
        case 'c':
            if (xmlStrEqual(node->name, BAD_CAST "col"))
                return(1);
            return(0);
        case 'f':
            if (xmlStrEqual(node->name, BAD_CAST "frame"))
                return(1);
            return(0);
        case 'h':
            if (xmlStrEqual(node->name, BAD_CAST "hr"))
                return(1);
            return(0);
        case 'i':
            if (xmlStrEqual(node->name, BAD_CAST "img"))
                return(1);
            if (xmlStrEqual(node->name, BAD_CAST "input"))
                return(1);
            if (xmlStrEqual(node->name, BAD_CAST "isindex"))
                return(1);
            return(0);
        case 'l':
            if (xmlStrEqual(node->name, BAD_CAST "link"))
                return(1);
            return(0);
        case 'm':
            if (xmlStrEqual(node->name, BAD_CAST "meta"))
                return(1);
            return(0);
        case 'p':
            if (xmlStrEqual(node->name, BAD_CAST "param"))
                return(1);
            return(0);
    }
    return(0);
}

/**
 * xhtmlAttrListDumpOutput:
 * @cur:  the first attribute pointer
 *
 * Dump a list of XML attributes
 */
static void
xhtmlAttrListDumpOutput(xmlSaveCtxtPtr ctxt, xmlAttrPtr cur) {
    xmlAttrPtr xml_lang = NULL;
    xmlAttrPtr lang = NULL;
    xmlAttrPtr name = NULL;
    xmlAttrPtr id = NULL;
    xmlNodePtr parent;
    xmlOutputBufferPtr buf;

    if (cur == NULL) return;
    buf = ctxt->buf;
    parent = cur->parent;
    while (cur != NULL) {
        if ((cur->ns == NULL) && (xmlStrEqual(cur->name, BAD_CAST "id")))
            id = cur;
        else
        if ((cur->ns == NULL) && (xmlStrEqual(cur->name, BAD_CAST "name")))
            name = cur;
        else
        if ((cur->ns == NULL) && (xmlStrEqual(cur->name, BAD_CAST "lang")))
            lang = cur;
        else
        if ((cur->ns != NULL) && (xmlStrEqual(cur->name, BAD_CAST "lang")) &&
            (xmlStrEqual(cur->ns->prefix, BAD_CAST "xml")))
            xml_lang = cur;
        else if ((cur->ns == NULL) && 
                 ((cur->children == NULL) ||
                  (cur->children->content == NULL) ||
                  (cur->children->content[0] == 0)) &&
                 (htmlIsBooleanAttr(cur->name))) {
            if (cur->children != NULL)
                xmlFreeNode(cur->children);
            cur->children = xmlNewText(cur->name);
            if (cur->children != NULL)
                cur->children->parent = (xmlNodePtr) cur;
        }
        xmlAttrDumpOutput(ctxt, cur);
        cur = cur->next;
    }
    /*
     * C.8
     */
    if ((name != NULL) && (id == NULL)) {
        if ((parent != NULL) && (parent->name != NULL) &&
            ((xmlStrEqual(parent->name, BAD_CAST "a")) ||
             (xmlStrEqual(parent->name, BAD_CAST "p")) ||
             (xmlStrEqual(parent->name, BAD_CAST "div")) ||
             (xmlStrEqual(parent->name, BAD_CAST "img")) ||
             (xmlStrEqual(parent->name, BAD_CAST "map")) ||
             (xmlStrEqual(parent->name, BAD_CAST "applet")) ||
             (xmlStrEqual(parent->name, BAD_CAST "form")) ||
             (xmlStrEqual(parent->name, BAD_CAST "frame")) ||
             (xmlStrEqual(parent->name, BAD_CAST "iframe")))) {
            xmlOutputBufferWrite(buf, 5, " id=\"");
            xmlAttrSerializeContent(buf, name);
            xmlOutputBufferWrite(buf, 1, "\"");
        }
    }
    /*
     * C.7.
     */
    if ((lang != NULL) && (xml_lang == NULL)) {
        xmlOutputBufferWrite(buf, 11, " xml:lang=\"");
        xmlAttrSerializeContent(buf, lang);
        xmlOutputBufferWrite(buf, 1, "\"");
    } else 
    if ((xml_lang != NULL) && (lang == NULL)) {
        xmlOutputBufferWrite(buf, 7, " lang=\"");
        xmlAttrSerializeContent(buf, xml_lang);
        xmlOutputBufferWrite(buf, 1, "\"");
    }
}

/**
 * xhtmlNodeListDumpOutput:
 * @buf:  the XML buffer output
 * @doc:  the XHTML document
 * @cur:  the first node
 * @level: the imbrication level for indenting
 * @format: is formatting allowed
 * @encoding:  an optional encoding string
 *
 * Dump an XML node list, recursive behaviour, children are printed too.
 * Note that @format = 1 provide node indenting only if xmlIndentTreeOutput = 1
 * or xmlKeepBlanksDefault(0) was called
 */
static void
xhtmlNodeListDumpOutput(xmlSaveCtxtPtr ctxt, xmlNodePtr cur) {
    xmlOutputBufferPtr buf;

    if (cur == NULL) return;
    buf = ctxt->buf;
    while (cur != NULL) {
        if ((ctxt->format) && (xmlIndentTreeOutput) &&
            (cur->type == XML_ELEMENT_NODE))
            xmlOutputBufferWrite(buf, ctxt->indent_size *
                                 (ctxt->level > ctxt->indent_nr ? 
                                  ctxt->indent_nr : ctxt->level),
                                 ctxt->indent);
        xhtmlNodeDumpOutput(ctxt, cur);
        if (ctxt->format) {
            xmlOutputBufferWrite(buf, 1, "\n");
        }
        cur = cur->next;
    }
}

/**
 * xhtmlNodeDumpOutput:
 * @buf:  the XML buffer output
 * @doc:  the XHTML document
 * @cur:  the current node
 * @level: the imbrication level for indenting
 * @format: is formatting allowed
 * @encoding:  an optional encoding string
 *
 * Dump an XHTML node, recursive behaviour, children are printed too.
 */
static void
xhtmlNodeDumpOutput(xmlSaveCtxtPtr ctxt, xmlNodePtr cur) {
    int format, addmeta = 0;
    xmlNodePtr tmp;
    xmlChar *start, *end;
    xmlOutputBufferPtr buf;

    if (cur == NULL) return;
    if ((cur->type == XML_DOCUMENT_NODE) ||
        (cur->type == XML_HTML_DOCUMENT_NODE)) {
        xmlDocContentDumpOutput(ctxt, (xmlDocPtr) cur);
        return;
    }
    if (cur->type == XML_XINCLUDE_START)
        return;
    if (cur->type == XML_XINCLUDE_END)
        return;
    if (cur->type == XML_DTD_NODE) {
        xmlDtdDumpOutput(ctxt, (xmlDtdPtr) cur);
        return;
    }
    if (cur->type == XML_DOCUMENT_FRAG_NODE) {
        xhtmlNodeListDumpOutput(ctxt, cur->children);
        return;
    }
    buf = ctxt->buf;
    if (cur->type == XML_ELEMENT_DECL) {
        xmlDumpElementDecl(buf->buffer, (xmlElementPtr) cur);
        return;
    }
    if (cur->type == XML_ATTRIBUTE_DECL) {
        xmlDumpAttributeDecl(buf->buffer, (xmlAttributePtr) cur);
        return;
    }
    if (cur->type == XML_ENTITY_DECL) {
        xmlDumpEntityDecl(buf->buffer, (xmlEntityPtr) cur);
        return;
    }
    if (cur->type == XML_TEXT_NODE) {
        if (cur->content != NULL) {
            if ((cur->name == xmlStringText) ||
                (cur->name != xmlStringTextNoenc)) {
                xmlOutputBufferWriteEscape(buf, cur->content, ctxt->escape);
            } else {
                /*
                 * Disable escaping, needed for XSLT
                 */
                xmlOutputBufferWriteString(buf, (const char *) cur->content);
            }
        }

        return;
    }
    if (cur->type == XML_PI_NODE) {
        if (cur->content != NULL) {
            xmlOutputBufferWrite(buf, 2, "<?");
            xmlOutputBufferWriteString(buf, (const char *)cur->name);
            if (cur->content != NULL) {
                xmlOutputBufferWrite(buf, 1, " ");
                xmlOutputBufferWriteString(buf, (const char *)cur->content);
            }
            xmlOutputBufferWrite(buf, 2, "?>");
        } else {
            xmlOutputBufferWrite(buf, 2, "<?");
            xmlOutputBufferWriteString(buf, (const char *)cur->name);
            xmlOutputBufferWrite(buf, 2, "?>");
        }
        return;
    }
    if (cur->type == XML_COMMENT_NODE) {
        if (cur->content != NULL) {
            xmlOutputBufferWrite(buf, 4, "<!--");
            xmlOutputBufferWriteString(buf, (const char *)cur->content);
            xmlOutputBufferWrite(buf, 3, "-->");
        }
        return;
    }
    if (cur->type == XML_ENTITY_REF_NODE) {
        xmlOutputBufferWrite(buf, 1, "&");
        xmlOutputBufferWriteString(buf, (const char *)cur->name);
        xmlOutputBufferWrite(buf, 1, ";");
        return;
    }
    if (cur->type == XML_CDATA_SECTION_NODE) {
        if (cur->content == NULL || *cur->content == '\0') {
            xmlOutputBufferWrite(buf, 12, "<![CDATA[]]>");
        } else {
            start = end = cur->content;
            while (*end != '\0') {
                if (*end == ']' && *(end + 1) == ']' && *(end + 2) == '>') {
                    end = end + 2;
                    xmlOutputBufferWrite(buf, 9, "<![CDATA[");
                    xmlOutputBufferWrite(buf, end - start, (const char *)start);
                    xmlOutputBufferWrite(buf, 3, "]]>");
                    start = end;
                }
                end++;
            }
            if (start != end) {
                xmlOutputBufferWrite(buf, 9, "<![CDATA[");
                xmlOutputBufferWriteString(buf, (const char *)start);
                xmlOutputBufferWrite(buf, 3, "]]>");
            }
        }
        return;
    }
    if (cur->type == XML_ATTRIBUTE_NODE) {
        xmlAttrDumpOutput(ctxt, (xmlAttrPtr) cur);
        return;
    }

    format = ctxt->format;
    if (format == 1) {
        tmp = cur->children;
        while (tmp != NULL) {
            if ((tmp->type == XML_TEXT_NODE) || 
                (tmp->type == XML_ENTITY_REF_NODE)) {
                format = 0;
                break;
            }
            tmp = tmp->next;
        }
    }
    xmlOutputBufferWrite(buf, 1, "<");
    if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
        xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);
        xmlOutputBufferWrite(buf, 1, ":");
    }

    xmlOutputBufferWriteString(buf, (const char *)cur->name);
    if (cur->nsDef)
        xmlNsListDumpOutput(buf, cur->nsDef);
    if ((xmlStrEqual(cur->name, BAD_CAST "html") &&
        (cur->ns == NULL) && (cur->nsDef == NULL))) {
        /*
         * 3.1.1. Strictly Conforming Documents A.3.1.1 3/
         */
        xmlOutputBufferWriteString(buf,
                " xmlns=\"http://www.w3.org/1999/xhtml\"");
    }
    if (cur->properties != NULL)
        xhtmlAttrListDumpOutput(ctxt, cur->properties);

        if ((cur->type == XML_ELEMENT_NODE) && 
                (cur->parent != NULL) && 
                (cur->parent->parent == (xmlNodePtr) cur->doc) && 
                xmlStrEqual(cur->name, BAD_CAST"head") && 
                xmlStrEqual(cur->parent->name, BAD_CAST"html")) {

                tmp = cur->children;
                while (tmp != NULL) {
                        if (xmlStrEqual(tmp->name, BAD_CAST"meta")) {
                                xmlChar *httpequiv;

                                httpequiv = xmlGetProp(tmp, BAD_CAST"http-equiv");
                                if (httpequiv != NULL) {
                                        if (xmlStrcasecmp(httpequiv, BAD_CAST"Content-Type") == 0) {
                                                xmlFree(httpequiv);
                                                break;
                                        }
                                        xmlFree(httpequiv);
                                }
                        }
                        tmp = tmp->next;
                }
                if (tmp == NULL)
                        addmeta = 1;
        }

    if ((cur->type == XML_ELEMENT_NODE) && (cur->children == NULL)) {
        if (((cur->ns == NULL) || (cur->ns->prefix == NULL)) &&
            ((xhtmlIsEmpty(cur) == 1) && (addmeta == 0))) {
            /*
             * C.2. Empty Elements
             */
            xmlOutputBufferWrite(buf, 3, " />");
        } else {
                if (addmeta == 1) {
                        xmlOutputBufferWrite(buf, 1, ">");
                        if (ctxt->format) {
                                xmlOutputBufferWrite(buf, 1, "\n");
                                if (xmlIndentTreeOutput)
                                        xmlOutputBufferWrite(buf, ctxt->indent_size *
                                        (ctxt->level + 1 > ctxt->indent_nr ? 
                                        ctxt->indent_nr : ctxt->level + 1), ctxt->indent);
                        }
                        xmlOutputBufferWriteString(buf,
                                "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=");
                        if (ctxt->encoding) {
                                xmlOutputBufferWriteString(buf, (const char *)ctxt->encoding);
                        } else {
                                xmlOutputBufferWrite(buf, 5, "UTF-8");
                        }
                        xmlOutputBufferWrite(buf, 4, "\" />");
                        if (ctxt->format)
                                xmlOutputBufferWrite(buf, 1, "\n");
                } else {
                        xmlOutputBufferWrite(buf, 1, ">");
                }
            /*
             * C.3. Element Minimization and Empty Element Content
             */
            xmlOutputBufferWrite(buf, 2, "</");
            if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
                xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);
                xmlOutputBufferWrite(buf, 1, ":");
            }
            xmlOutputBufferWriteString(buf, (const char *)cur->name);
            xmlOutputBufferWrite(buf, 1, ">");
        }
        return;
    }
    xmlOutputBufferWrite(buf, 1, ">");
        if (addmeta == 1) {
                if (ctxt->format) {
                        xmlOutputBufferWrite(buf, 1, "\n");
                        if (xmlIndentTreeOutput)
                                xmlOutputBufferWrite(buf, ctxt->indent_size *
                                (ctxt->level + 1 > ctxt->indent_nr ? 
                                ctxt->indent_nr : ctxt->level + 1), ctxt->indent);
                }
                xmlOutputBufferWriteString(buf,
                        "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=");
                if (ctxt->encoding) {
                        xmlOutputBufferWriteString(buf, (const char *)ctxt->encoding);
                } else {
                        xmlOutputBufferWrite(buf, 5, "UTF-8");
                }
                xmlOutputBufferWrite(buf, 4, "\" />");
        }
    if ((cur->type != XML_ELEMENT_NODE) && (cur->content != NULL)) {
        xmlOutputBufferWriteEscape(buf, cur->content, ctxt->escape);
    }

#if 0
    /*
    * This was removed due to problems with HTML processors.
    * See bug #345147.
    */
    /*
     * 4.8. Script and Style elements
     */
    if ((cur->type == XML_ELEMENT_NODE) &&
        ((xmlStrEqual(cur->name, BAD_CAST "script")) ||
         (xmlStrEqual(cur->name, BAD_CAST "style"))) &&
        ((cur->ns == NULL) ||
         (xmlStrEqual(cur->ns->href, XHTML_NS_NAME)))) {
        xmlNodePtr child = cur->children;

        while (child != NULL) {
            if (child->type == XML_TEXT_NODE) {
                if ((xmlStrchr(child->content, '<') == NULL) &&
                    (xmlStrchr(child->content, '&') == NULL) &&
                    (xmlStrstr(child->content, BAD_CAST "]]>") == NULL)) {
                    /* Nothing to escape, so just output as is... */
                    /* FIXME: Should we do something about "--" also? */
                    int level = ctxt->level;
                    int indent = ctxt->format;

                    ctxt->level = 0;
                    ctxt->format = 0;
                    xmlOutputBufferWriteString(buf, (const char *) child->content);
                    /* (We cannot use xhtmlNodeDumpOutput() here because
                     * we wish to leave '>' unescaped!) */
                    ctxt->level = level;
                    ctxt->format = indent;
                } else {
                    /* We must use a CDATA section.  Unfortunately,
                     * this will break CSS and JavaScript when read by
                     * a browser in HTML4-compliant mode. :-( */
                    start = end = child->content;
                    while (*end != '\0') {
                        if (*end == ']' &&
                            *(end + 1) == ']' &&
                            *(end + 2) == '>') {
                            end = end + 2;
                            xmlOutputBufferWrite(buf, 9, "<![CDATA[");
                            xmlOutputBufferWrite(buf, end - start,
                                                 (const char *)start);
                            xmlOutputBufferWrite(buf, 3, "]]>");
                            start = end;
                        }
                        end++;
                    }
                    if (start != end) {
                        xmlOutputBufferWrite(buf, 9, "<![CDATA[");
                        xmlOutputBufferWrite(buf, end - start,
                                             (const char *)start);
                        xmlOutputBufferWrite(buf, 3, "]]>");
                    }
                }
            } else {
                int level = ctxt->level;
                int indent = ctxt->format;

                ctxt->level = 0;
                ctxt->format = 0;
                xhtmlNodeDumpOutput(ctxt, child);
                ctxt->level = level;
                ctxt->format = indent;
            }
            child = child->next;
        }
    }
#endif

    if (cur->children != NULL) {
        int indent = ctxt->format;
        
        if (format) xmlOutputBufferWrite(buf, 1, "\n");
        if (ctxt->level >= 0) ctxt->level++;
        ctxt->format = format;
        xhtmlNodeListDumpOutput(ctxt, cur->children);
        if (ctxt->level > 0) ctxt->level--;
        ctxt->format = indent;
        if ((xmlIndentTreeOutput) && (format))
            xmlOutputBufferWrite(buf, ctxt->indent_size *
                                 (ctxt->level > ctxt->indent_nr ? 
                                  ctxt->indent_nr : ctxt->level),
                                 ctxt->indent);
    }
    xmlOutputBufferWrite(buf, 2, "</");
    if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
        xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);
        xmlOutputBufferWrite(buf, 1, ":");
    }

    xmlOutputBufferWriteString(buf, (const char *)cur->name);
    xmlOutputBufferWrite(buf, 1, ">");
}
#endif

/************************************************************************
 *                                                                      *
 *                      Public entry points                             *
 *                                                                      *
 ************************************************************************/

/**
 * xmlSaveToFd:
 * @fd:  a file descriptor number
 * @encoding:  the encoding name to use or NULL
 * @options:  a set of xmlSaveOptions
 *
 * Create a document saving context serializing to a file descriptor
 * with the encoding and the options given.
 *
 * Returns a new serialization context or NULL in case of error.
 */
xmlSaveCtxtPtr
xmlSaveToFd(int fd, const char *encoding, int options)
{
    xmlSaveCtxtPtr ret;

    ret = xmlNewSaveCtxt(encoding, options);
    if (ret == NULL) return(NULL);
    ret->buf = xmlOutputBufferCreateFd(fd, ret->handler);
    if (ret->buf == NULL) {
        xmlFreeSaveCtxt(ret);
        return(NULL);
    }
    return(ret);
}

/**
 * xmlSaveToFilename:
 * @filename:  a file name or an URL
 * @encoding:  the encoding name to use or NULL
 * @options:  a set of xmlSaveOptions
 *
 * Create a document saving context serializing to a filename or possibly
 * to an URL (but this is less reliable) with the encoding and the options
 * given.
 *
 * Returns a new serialization context or NULL in case of error.
 */
xmlSaveCtxtPtr
xmlSaveToFilename(const char *filename, const char *encoding, int options)
{
    xmlSaveCtxtPtr ret;
    int compression = 0; /* TODO handle compression option */

    ret = xmlNewSaveCtxt(encoding, options);
    if (ret == NULL) return(NULL);
    ret->buf = xmlOutputBufferCreateFilename(filename, ret->handler,
                                             compression);
    if (ret->buf == NULL) {
        xmlFreeSaveCtxt(ret);
        return(NULL);
    }
    return(ret);
}

/**
 * xmlSaveToBuffer:
 * @buffer:  a buffer
 * @encoding:  the encoding name to use or NULL
 * @options:  a set of xmlSaveOptions
 *
 * Create a document saving context serializing to a buffer
 * with the encoding and the options given
 *
 * Returns a new serialization context or NULL in case of error.
 */

xmlSaveCtxtPtr
xmlSaveToBuffer(xmlBufferPtr buffer, const char *encoding, int options)
{
    xmlSaveCtxtPtr ret;
    xmlOutputBufferPtr out_buff;
    xmlCharEncodingHandlerPtr handler;

    ret = xmlNewSaveCtxt(encoding, options);
    if (ret == NULL) return(NULL);

    if (encoding != NULL) {
        handler = xmlFindCharEncodingHandler(encoding);
        if (handler == NULL) {
            xmlFree(ret);
            return(NULL);
        }
    } else
        handler = NULL;
    out_buff = xmlOutputBufferCreateBuffer(buffer, handler);
    if (out_buff == NULL) {
        xmlFree(ret);
        if (handler) xmlCharEncCloseFunc(handler);
        return(NULL);
    }

    ret->buf = out_buff;
    return(ret);
}

/**
 * xmlSaveToIO:
 * @iowrite:  an I/O write function
 * @ioclose:  an I/O close function
 * @ioctx:  an I/O handler
 * @encoding:  the encoding name to use or NULL
 * @options:  a set of xmlSaveOptions
 *
 * Create a document saving context serializing to a file descriptor
 * with the encoding and the options given
 *
 * Returns a new serialization context or NULL in case of error.
 */
xmlSaveCtxtPtr
xmlSaveToIO(xmlOutputWriteCallback iowrite,
            xmlOutputCloseCallback ioclose,
            void *ioctx, const char *encoding, int options)
{
    xmlSaveCtxtPtr ret;

    ret = xmlNewSaveCtxt(encoding, options);
    if (ret == NULL) return(NULL);
    ret->buf = xmlOutputBufferCreateIO(iowrite, ioclose, ioctx, ret->handler);
    if (ret->buf == NULL) {
        xmlFreeSaveCtxt(ret);
        return(NULL);
    }
    return(ret);
}

/**
 * xmlSaveDoc:
 * @ctxt:  a document saving context
 * @doc:  a document
 *
 * Save a full document to a saving context
 * TODO: The function is not fully implemented yet as it does not return the
 * byte count but 0 instead
 *
 * Returns the number of byte written or -1 in case of error
 */
long
xmlSaveDoc(xmlSaveCtxtPtr ctxt, xmlDocPtr doc)
{
    long ret = 0;

    if ((ctxt == NULL) || (doc == NULL)) return(-1);
    if (xmlDocContentDumpOutput(ctxt, doc) < 0)
        return(-1);
    return(ret);
}

/**
 * xmlSaveTree:
 * @ctxt:  a document saving context
 * @node:  the top node of the subtree to save
 *
 * Save a subtree starting at the node parameter to a saving context
 * TODO: The function is not fully implemented yet as it does not return the
 * byte count but 0 instead
 *
 * Returns the number of byte written or -1 in case of error
 */
long
xmlSaveTree(xmlSaveCtxtPtr ctxt, xmlNodePtr node)
{
    long ret = 0;

    if ((ctxt == NULL) || (node == NULL)) return(-1);
    xmlNodeDumpOutputInternal(ctxt, node);
    return(ret);
}

/**
 * xmlSaveFlush:
 * @ctxt:  a document saving context
 *
 * Flush a document saving context, i.e. make sure that all bytes have
 * been output.
 *
 * Returns the number of byte written or -1 in case of error.
 */
int
xmlSaveFlush(xmlSaveCtxtPtr ctxt)
{
    if (ctxt == NULL) return(-1);
    if (ctxt->buf == NULL) return(-1);
    return(xmlOutputBufferFlush(ctxt->buf));
}

/**
 * xmlSaveClose:
 * @ctxt:  a document saving context
 *
 * Close a document saving context, i.e. make sure that all bytes have
 * been output and free the associated data.
 *
 * Returns the number of byte written or -1 in case of error.
 */
int
xmlSaveClose(xmlSaveCtxtPtr ctxt)
{
    int ret;

    if (ctxt == NULL) return(-1);
    ret = xmlSaveFlush(ctxt);
    xmlFreeSaveCtxt(ctxt);
    return(ret);
}

/**
 * xmlSaveSetEscape:
 * @ctxt:  a document saving context
 * @escape:  the escaping function
 *
 * Set a custom escaping function to be used for text in element content
 *
 * Returns 0 if successful or -1 in case of error.
 */
int
xmlSaveSetEscape(xmlSaveCtxtPtr ctxt, xmlCharEncodingOutputFunc escape)
{
    if (ctxt == NULL) return(-1);
    ctxt->escape = escape;
    return(0);
}

/**
 * xmlSaveSetAttrEscape:
 * @ctxt:  a document saving context
 * @escape:  the escaping function
 *
 * Set a custom escaping function to be used for text in attribute content
 *
 * Returns 0 if successful or -1 in case of error.
 */
int
xmlSaveSetAttrEscape(xmlSaveCtxtPtr ctxt, xmlCharEncodingOutputFunc escape)
{
    if (ctxt == NULL) return(-1);
    ctxt->escapeAttr = escape;
    return(0);
}

/************************************************************************
 *                                                                      *
 *              Public entry points based on buffers                    *
 *                                                                      *
 ************************************************************************/
/**
 * xmlAttrSerializeTxtContent:
 * @buf:  the XML buffer output
 * @doc:  the document
 * @attr: the attribute node
 * @string: the text content
 *
 * Serialize text attribute values to an xml simple buffer
 */
void
xmlAttrSerializeTxtContent(xmlBufferPtr buf, xmlDocPtr doc,
                           xmlAttrPtr attr, const xmlChar * string)
{
    xmlChar *base, *cur;

    if (string == NULL)
        return;
    base = cur = (xmlChar *) string;
    while (*cur != 0) {
        if (*cur == '\n') {
            if (base != cur)
                xmlBufferAdd(buf, base, cur - base);
            xmlBufferAdd(buf, BAD_CAST "&#10;", 5);
            cur++;
            base = cur;
        } else if (*cur == '\r') {
            if (base != cur)
                xmlBufferAdd(buf, base, cur - base);
            xmlBufferAdd(buf, BAD_CAST "&#13;", 5);
            cur++;
            base = cur;
        } else if (*cur == '\t') {
            if (base != cur)
                xmlBufferAdd(buf, base, cur - base);
            xmlBufferAdd(buf, BAD_CAST "&#9;", 4);
            cur++;
            base = cur;
        } else if (*cur == '"') {
            if (base != cur)
                xmlBufferAdd(buf, base, cur - base);
            xmlBufferAdd(buf, BAD_CAST "&quot;", 6);
            cur++;
            base = cur;
        } else if (*cur == '<') {
            if (base != cur)
                xmlBufferAdd(buf, base, cur - base);
            xmlBufferAdd(buf, BAD_CAST "&lt;", 4);
            cur++;
            base = cur;
        } else if (*cur == '>') {
            if (base != cur)
                xmlBufferAdd(buf, base, cur - base);
            xmlBufferAdd(buf, BAD_CAST "&gt;", 4);
            cur++;
            base = cur;
        } else if (*cur == '&') {
            if (base != cur)
                xmlBufferAdd(buf, base, cur - base);
            xmlBufferAdd(buf, BAD_CAST "&amp;", 5);
            cur++;
            base = cur;
        } else if ((*cur >= 0x80) && ((doc == NULL) ||
                                      (doc->encoding == NULL))) {
            /*
             * We assume we have UTF-8 content.
             */
            unsigned char tmp[12];
            int val = 0, l = 1;

            if (base != cur)
                xmlBufferAdd(buf, base, cur - base);
            if (*cur < 0xC0) {
                xmlSaveErr(XML_SAVE_NOT_UTF8, (xmlNodePtr) attr, NULL);
                if (doc != NULL)
                    doc->encoding = xmlStrdup(BAD_CAST "ISO-8859-1");
                xmlSerializeHexCharRef(tmp, *cur);
                xmlBufferAdd(buf, (xmlChar *) tmp, -1);
                cur++;
                base = cur;
                continue;
            } else if (*cur < 0xE0) {
                val = (cur[0]) & 0x1F;
                val <<= 6;
                val |= (cur[1]) & 0x3F;
                l = 2;
            } else if (*cur < 0xF0) {
                val = (cur[0]) & 0x0F;
                val <<= 6;
                val |= (cur[1]) & 0x3F;
                val <<= 6;
                val |= (cur[2]) & 0x3F;
                l = 3;
            } else if (*cur < 0xF8) {
                val = (cur[0]) & 0x07;
                val <<= 6;
                val |= (cur[1]) & 0x3F;
                val <<= 6;
                val |= (cur[2]) & 0x3F;
                val <<= 6;
                val |= (cur[3]) & 0x3F;
                l = 4;
            }
            if ((l == 1) || (!IS_CHAR(val))) {
                xmlSaveErr(XML_SAVE_CHAR_INVALID, (xmlNodePtr) attr, NULL);
                if (doc != NULL)
                    doc->encoding = xmlStrdup(BAD_CAST "ISO-8859-1");
                
                xmlSerializeHexCharRef(tmp, *cur);
                xmlBufferAdd(buf, (xmlChar *) tmp, -1);
                cur++;
                base = cur;
                continue;
            }
            /*
             * We could do multiple things here. Just save
             * as a char ref
             */
            xmlSerializeHexCharRef(tmp, val);
            xmlBufferAdd(buf, (xmlChar *) tmp, -1);
            cur += l;
            base = cur;
        } else {
            cur++;
        }
    }
    if (base != cur)
        xmlBufferAdd(buf, base, cur - base);
}

/**
 * xmlNodeDump:
 * @buf:  the XML buffer output
 * @doc:  the document
 * @cur:  the current node
 * @level: the imbrication level for indenting
 * @format: is formatting allowed
 *
 * Dump an XML node, recursive behaviour,children are printed too.
 * Note that @format = 1 provide node indenting only if xmlIndentTreeOutput = 1
 * or xmlKeepBlanksDefault(0) was called
 *
 * Returns the number of bytes written to the buffer or -1 in case of error
 */
int
xmlNodeDump(xmlBufferPtr buf, xmlDocPtr doc, xmlNodePtr cur, int level,
            int format)
{
    unsigned int use;
    int ret;
    xmlOutputBufferPtr outbuf;

    xmlInitParser();

    if (cur == NULL) {
#ifdef DEBUG_TREE
        xmlGenericError(xmlGenericErrorContext,
                        "xmlNodeDump : node == NULL\n");
#endif
        return (-1);
    }
    if (buf == NULL) {
#ifdef DEBUG_TREE
        xmlGenericError(xmlGenericErrorContext,
                        "xmlNodeDump : buf == NULL\n");
#endif
        return (-1);
    }
    outbuf = (xmlOutputBufferPtr) xmlMalloc(sizeof(xmlOutputBuffer));
    if (outbuf == NULL) {
        xmlSaveErrMemory("creating buffer");
        return (-1);
    }
    memset(outbuf, 0, (size_t) sizeof(xmlOutputBuffer));
    outbuf->buffer = buf;
    outbuf->encoder = NULL;
    outbuf->writecallback = NULL;
    outbuf->closecallback = NULL;
    outbuf->context = NULL;
    outbuf->written = 0;

    use = buf->use;
    xmlNodeDumpOutput(outbuf, doc, cur, level, format, NULL);
    xmlFree(outbuf);
    ret = buf->use - use;
    return (ret);
}

/**
 * xmlElemDump:
 * @f:  the FILE * for the output
 * @doc:  the document
 * @cur:  the current node
 *
 * Dump an XML/HTML node, recursive behaviour, children are printed too.
 */
void
xmlElemDump(FILE * f, xmlDocPtr doc, xmlNodePtr cur)
{
    xmlOutputBufferPtr outbuf;

    xmlInitParser();

    if (cur == NULL) {
#ifdef DEBUG_TREE
        xmlGenericError(xmlGenericErrorContext,
                        "xmlElemDump : cur == NULL\n");
#endif
        return;
    }
#ifdef DEBUG_TREE
    if (doc == NULL) {
        xmlGenericError(xmlGenericErrorContext,
                        "xmlElemDump : doc == NULL\n");
    }
#endif

    outbuf = xmlOutputBufferCreateFile(f, NULL);
    if (outbuf == NULL)
        return;
    if ((doc != NULL) && (doc->type == XML_HTML_DOCUMENT_NODE)) {
#ifdef LIBXML_HTML_ENABLED
        htmlNodeDumpOutput(outbuf, doc, cur, NULL);
#else
        xmlSaveErr(XML_ERR_INTERNAL_ERROR, cur, "HTML support not compiled in\n");
#endif /* LIBXML_HTML_ENABLED */
    } else
        xmlNodeDumpOutput(outbuf, doc, cur, 0, 1, NULL);
    xmlOutputBufferClose(outbuf);
}

/************************************************************************
 *                                                                      *
 *              Saving functions front-ends                             *
 *                                                                      *
 ************************************************************************/

/**
 * xmlNodeDumpOutput:
 * @buf:  the XML buffer output
 * @doc:  the document
 * @cur:  the current node
 * @level: the imbrication level for indenting
 * @format: is formatting allowed
 * @encoding:  an optional encoding string
 *
 * Dump an XML node, recursive behaviour, children are printed too.
 * Note that @format = 1 provide node indenting only if xmlIndentTreeOutput = 1
 * or xmlKeepBlanksDefault(0) was called
 */
void
xmlNodeDumpOutput(xmlOutputBufferPtr buf, xmlDocPtr doc, xmlNodePtr cur,
                  int level, int format, const char *encoding)
{
    xmlSaveCtxt ctxt;
#ifdef LIBXML_HTML_ENABLED
    xmlDtdPtr dtd;
    int is_xhtml = 0;
#endif

    xmlInitParser();

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

    if (encoding == NULL)
        encoding = "UTF-8";

    memset(&ctxt, 0, sizeof(ctxt));
    ctxt.doc = doc;
    ctxt.buf = buf;
    ctxt.level = level;
    ctxt.format = format;
    ctxt.encoding = (const xmlChar *) encoding;
    xmlSaveCtxtInit(&ctxt);
    ctxt.options |= XML_SAVE_AS_XML;

#ifdef LIBXML_HTML_ENABLED
    dtd = xmlGetIntSubset(doc);
    if (dtd != NULL) {
        is_xhtml = xmlIsXHTML(dtd->SystemID, dtd->ExternalID);
        if (is_xhtml < 0)
            is_xhtml = 0;
    }

    if (is_xhtml)
        xhtmlNodeDumpOutput(&ctxt, cur);
    else
#endif
        xmlNodeDumpOutputInternal(&ctxt, cur);
}

/**
 * xmlDocDumpFormatMemoryEnc:
 * @out_doc:  Document to generate XML text from
 * @doc_txt_ptr:  Memory pointer for allocated XML text
 * @doc_txt_len:  Length of the generated XML text
 * @txt_encoding:  Character encoding to use when generating XML text
 * @format:  should formatting spaces been added
 *
 * Dump the current DOM tree into memory using the character encoding specified
 * by the caller.  Note it is up to the caller of this function to free the
 * allocated memory with xmlFree().
 * Note that @format = 1 provide node indenting only if xmlIndentTreeOutput = 1
 * or xmlKeepBlanksDefault(0) was called
 */

void
xmlDocDumpFormatMemoryEnc(xmlDocPtr out_doc, xmlChar **doc_txt_ptr,
                int * doc_txt_len, const char * txt_encoding,
                int format) {
    xmlSaveCtxt ctxt;
    int                         dummy = 0;
    xmlOutputBufferPtr          out_buff = NULL;
    xmlCharEncodingHandlerPtr   conv_hdlr = NULL;

    if (doc_txt_len == NULL) {
        doc_txt_len = &dummy;   /*  Continue, caller just won't get length */
    }

    if (doc_txt_ptr == NULL) {
        *doc_txt_len = 0;
        return;
    }

    *doc_txt_ptr = NULL;
    *doc_txt_len = 0;

    if (out_doc == NULL) {
        /*  No document, no output  */
        return;
    }

    /*
     *  Validate the encoding value, if provided.
     *  This logic is copied from xmlSaveFileEnc.
     */

    if (txt_encoding == NULL)
        txt_encoding = (const char *) out_doc->encoding;
    if (txt_encoding != NULL) {
        conv_hdlr = xmlFindCharEncodingHandler(txt_encoding);
        if ( conv_hdlr == NULL ) {
            xmlSaveErr(XML_SAVE_UNKNOWN_ENCODING, (xmlNodePtr) out_doc,
                       txt_encoding);
            return;
        }
    }

    if ((out_buff = xmlAllocOutputBuffer(conv_hdlr)) == NULL ) {
        xmlSaveErrMemory("creating buffer");
        return;
    }

    memset(&ctxt, 0, sizeof(ctxt));
    ctxt.doc = out_doc;
    ctxt.buf = out_buff;
    ctxt.level = 0;
    ctxt.format = format;
    ctxt.encoding = (const xmlChar *) txt_encoding;
    xmlSaveCtxtInit(&ctxt);
    ctxt.options |= XML_SAVE_AS_XML;
    xmlDocContentDumpOutput(&ctxt, out_doc);
    xmlOutputBufferFlush(out_buff);
    if (out_buff->conv != NULL) {
        *doc_txt_len = out_buff->conv->use;
        *doc_txt_ptr = xmlStrndup(out_buff->conv->content, *doc_txt_len);
    } else {
        *doc_txt_len = out_buff->buffer->use;
        *doc_txt_ptr = xmlStrndup(out_buff->buffer->content, *doc_txt_len);
    }
    (void)xmlOutputBufferClose(out_buff);

    if ((*doc_txt_ptr == NULL) && (*doc_txt_len > 0)) {
        *doc_txt_len = 0;
        xmlSaveErrMemory("creating output");
    }

    return;
}

/**
 * xmlDocDumpMemory:
 * @cur:  the document
 * @mem:  OUT: the memory pointer
 * @size:  OUT: the memory length
 *
 * Dump an XML document in memory and return the #xmlChar * and it's size
 * in bytes. It's up to the caller to free the memory with xmlFree().
 * The resulting byte array is zero terminated, though the last 0 is not
 * included in the returned size.
 */
void
xmlDocDumpMemory(xmlDocPtr cur, xmlChar**mem, int *size) {
    xmlDocDumpFormatMemoryEnc(cur, mem, size, NULL, 0);
}

/**
 * xmlDocDumpFormatMemory:
 * @cur:  the document
 * @mem:  OUT: the memory pointer
 * @size:  OUT: the memory length
 * @format:  should formatting spaces been added
 *
 *
 * Dump an XML document in memory and return the #xmlChar * and it's size.
 * It's up to the caller to free the memory with xmlFree().
 * Note that @format = 1 provide node indenting only if xmlIndentTreeOutput = 1
 * or xmlKeepBlanksDefault(0) was called
 */
void
xmlDocDumpFormatMemory(xmlDocPtr cur, xmlChar**mem, int *size, int format) {
    xmlDocDumpFormatMemoryEnc(cur, mem, size, NULL, format);
}

/**
 * xmlDocDumpMemoryEnc:
 * @out_doc:  Document to generate XML text from
 * @doc_txt_ptr:  Memory pointer for allocated XML text
 * @doc_txt_len:  Length of the generated XML text
 * @txt_encoding:  Character encoding to use when generating XML text
 *
 * Dump the current DOM tree into memory using the character encoding specified
 * by the caller.  Note it is up to the caller of this function to free the
 * allocated memory with xmlFree().
 */

void
xmlDocDumpMemoryEnc(xmlDocPtr out_doc, xmlChar **doc_txt_ptr,
                    int * doc_txt_len, const char * txt_encoding) {
    xmlDocDumpFormatMemoryEnc(out_doc, doc_txt_ptr, doc_txt_len,
                              txt_encoding, 0);
}

/**
 * xmlDocFormatDump:
 * @f:  the FILE*
 * @cur:  the document
 * @format: should formatting spaces been added
 *
 * Dump an XML document to an open FILE.
 *
 * returns: the number of bytes written or -1 in case of failure.
 * Note that @format = 1 provide node indenting only if xmlIndentTreeOutput = 1
 * or xmlKeepBlanksDefault(0) was called
 */
int
xmlDocFormatDump(FILE *f, xmlDocPtr cur, int format) {
    xmlSaveCtxt ctxt;
    xmlOutputBufferPtr buf;
    const char * encoding;
    xmlCharEncodingHandlerPtr handler = NULL;
    int ret;

    if (cur == NULL) {
#ifdef DEBUG_TREE
        xmlGenericError(xmlGenericErrorContext,
                "xmlDocDump : document == NULL\n");
#endif
        return(-1);
    }
    encoding = (const char *) cur->encoding;

    if (encoding != NULL) {
        handler = xmlFindCharEncodingHandler(encoding);
        if (handler == NULL) {
            xmlFree((char *) cur->encoding);
            cur->encoding = NULL;
            encoding = NULL;
        }
    }
    buf = xmlOutputBufferCreateFile(f, handler);
    if (buf == NULL) return(-1);
    memset(&ctxt, 0, sizeof(ctxt));
    ctxt.doc = cur;
    ctxt.buf = buf;
    ctxt.level = 0;
    ctxt.format = format;
    ctxt.encoding = (const xmlChar *) encoding;
    xmlSaveCtxtInit(&ctxt);
    ctxt.options |= XML_SAVE_AS_XML;
    xmlDocContentDumpOutput(&ctxt, cur);

    ret = xmlOutputBufferClose(buf);
    return(ret);
}

/**
 * xmlDocDump:
 * @f:  the FILE*
 * @cur:  the document
 *
 * Dump an XML document to an open FILE.
 *
 * returns: the number of bytes written or -1 in case of failure.
 */
int
xmlDocDump(FILE *f, xmlDocPtr cur) {
    return(xmlDocFormatDump (f, cur, 0));
}

/**
 * xmlSaveFileTo:
 * @buf:  an output I/O buffer
 * @cur:  the document
 * @encoding:  the encoding if any assuming the I/O layer handles the trancoding
 *
 * Dump an XML document to an I/O buffer.
 * Warning ! This call xmlOutputBufferClose() on buf which is not available
 * after this call.
 *
 * returns: the number of bytes written or -1 in case of failure.
 */
int
xmlSaveFileTo(xmlOutputBufferPtr buf, xmlDocPtr cur, const char *encoding) {
    xmlSaveCtxt ctxt;
    int ret;

    if (buf == NULL) return(-1);
    if (cur == NULL) {
        xmlOutputBufferClose(buf);
        return(-1);
    }
    memset(&ctxt, 0, sizeof(ctxt));
    ctxt.doc = cur;
    ctxt.buf = buf;
    ctxt.level = 0;
    ctxt.format = 0;
    ctxt.encoding = (const xmlChar *) encoding;
    xmlSaveCtxtInit(&ctxt);
    ctxt.options |= XML_SAVE_AS_XML;
    xmlDocContentDumpOutput(&ctxt, cur);
    ret = xmlOutputBufferClose(buf);
    return(ret);
}

/**
 * xmlSaveFormatFileTo:
 * @buf:  an output I/O buffer
 * @cur:  the document
 * @encoding:  the encoding if any assuming the I/O layer handles the trancoding
 * @format: should formatting spaces been added
 *
 * Dump an XML document to an I/O buffer.
 * Warning ! This call xmlOutputBufferClose() on buf which is not available
 * after this call.
 *
 * returns: the number of bytes written or -1 in case of failure.
 */
int
xmlSaveFormatFileTo(xmlOutputBufferPtr buf, xmlDocPtr cur,
                    const char *encoding, int format)
{
    xmlSaveCtxt ctxt;
    int ret;

    if (buf == NULL) return(-1);
    if ((cur == NULL) ||
        ((cur->type != XML_DOCUMENT_NODE) &&
         (cur->type != XML_HTML_DOCUMENT_NODE))) {
        xmlOutputBufferClose(buf);
        return(-1);
    }
    memset(&ctxt, 0, sizeof(ctxt));
    ctxt.doc = cur;
    ctxt.buf = buf;
    ctxt.level = 0;
    ctxt.format = format;
    ctxt.encoding = (const xmlChar *) encoding;
    xmlSaveCtxtInit(&ctxt);
    ctxt.options |= XML_SAVE_AS_XML;
    xmlDocContentDumpOutput(&ctxt, cur);
    ret = xmlOutputBufferClose(buf);
    return (ret);
}

/**
 * xmlSaveFormatFileEnc:
 * @filename:  the filename or URL to output
 * @cur:  the document being saved
 * @encoding:  the name of the encoding to use or NULL.
 * @format:  should formatting spaces be added.
 *
 * Dump an XML document to a file or an URL.
 *
 * Returns the number of bytes written or -1 in case of error.
 * Note that @format = 1 provide node indenting only if xmlIndentTreeOutput = 1
 * or xmlKeepBlanksDefault(0) was called
 */
int
xmlSaveFormatFileEnc( const char * filename, xmlDocPtr cur,
                        const char * encoding, int format ) {
    xmlSaveCtxt ctxt;
    xmlOutputBufferPtr buf;
    xmlCharEncodingHandlerPtr handler = NULL;
    int ret;

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

    if (encoding == NULL)
        encoding = (const char *) cur->encoding;

    if (encoding != NULL) {

            handler = xmlFindCharEncodingHandler(encoding);
            if (handler == NULL)
                return(-1);
    }

#ifdef HAVE_ZLIB_H
    if (cur->compression < 0) cur->compression = xmlGetCompressMode();
#endif
    /* 
     * save the content to a temp buffer.
     */
    buf = xmlOutputBufferCreateFilename(filename, handler, cur->compression);
    if (buf == NULL) return(-1);
    memset(&ctxt, 0, sizeof(ctxt));
    ctxt.doc = cur;
    ctxt.buf = buf;
    ctxt.level = 0;
    ctxt.format = format;
    ctxt.encoding = (const xmlChar *) encoding;
    xmlSaveCtxtInit(&ctxt);
    ctxt.options |= XML_SAVE_AS_XML;

    xmlDocContentDumpOutput(&ctxt, cur);

    ret = xmlOutputBufferClose(buf);
    return(ret);
}


/**
 * xmlSaveFileEnc:
 * @filename:  the filename (or URL)
 * @cur:  the document
 * @encoding:  the name of an encoding (or NULL)
 *
 * Dump an XML document, converting it to the given encoding
 *
 * returns: the number of bytes written or -1 in case of failure.
 */
int
xmlSaveFileEnc(const char *filename, xmlDocPtr cur, const char *encoding) {
    return ( xmlSaveFormatFileEnc( filename, cur, encoding, 0 ) );
}

/**
 * xmlSaveFormatFile:
 * @filename:  the filename (or URL)
 * @cur:  the document
 * @format:  should formatting spaces been added
 *
 * Dump an XML document to a file. Will use compression if
 * compiled in and enabled. If @filename is "-" the stdout file is
 * used. If @format is set then the document will be indented on output.
 * Note that @format = 1 provide node indenting only if xmlIndentTreeOutput = 1
 * or xmlKeepBlanksDefault(0) was called
 *
 * returns: the number of bytes written or -1 in case of failure.
 */
int
xmlSaveFormatFile(const char *filename, xmlDocPtr cur, int format) {
    return ( xmlSaveFormatFileEnc( filename, cur, NULL, format ) );
}

/**
 * xmlSaveFile:
 * @filename:  the filename (or URL)
 * @cur:  the document
 *
 * Dump an XML document to a file. Will use compression if
 * compiled in and enabled. If @filename is "-" the stdout file is
 * used.
 * returns: the number of bytes written or -1 in case of failure.
 */
int
xmlSaveFile(const char *filename, xmlDocPtr cur) {
    return(xmlSaveFormatFileEnc(filename, cur, NULL, 0));
}

#endif /* LIBXML_OUTPUT_ENABLED */

#define bottom_xmlsave
#include "elfgcchack.h"
/* [<][>][^][v][top][bottom][index][help] */
root/third_party/libxml/src/xmlsave.c

DEFINITIONS
