/* [<][>][^][v][top][bottom][index][help] */
DEFINITIONS
This source file includes following definitions.
- get_next_char
- php_next_utf8_char
- determine_charset
- php_utf32_utf8
- php_mb2_int_to_char
- php_mb3_int_to_char
- unimap_bsearch
- map_from_unicode
- map_to_unicode
- unicode_cp_is_allowed
- numeric_entity_is_allowed
- process_numeric_entity
- process_named_entity_html
- resolve_named_entity_html
- write_octet_sequence
- traverse_for_entities
- unescape_inverse_map
- determine_entity_table
- php_unescape_html_entities
- php_escape_html_entities
- find_entity_for_char
- find_entity_for_char_basic
- php_escape_html_entities_ex
- php_html_entities
- register_html_constants
- PHP_FUNCTION
- PHP_FUNCTION
- PHP_FUNCTION
- PHP_FUNCTION
- write_s3row_data
- PHP_FUNCTION
/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2015 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Rasmus Lerdorf <rasmus@php.net> |
| Jaakko Hyvätti <jaakko.hyvatti@iki.fi> |
| Wez Furlong <wez@thebrainroom.com> |
| Gustavo Lopes <cataphract@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
/*
* HTML entity resources:
*
* http://www.unicode.org/Public/MAPPINGS/OBSOLETE/UNI2SGML.TXT
*
* XHTML 1.0 DTD
* http://www.w3.org/TR/2002/REC-xhtml1-20020801/dtds.html#h-A2
*
* From HTML 4.01 strict DTD:
* http://www.w3.org/TR/html4/HTMLlat1.ent
* http://www.w3.org/TR/html4/HTMLsymbol.ent
* http://www.w3.org/TR/html4/HTMLspecial.ent
*
* HTML 5:
* http://dev.w3.org/html5/spec/Overview.html#named-character-references
*/
#include "php.h"
#if PHP_WIN32
#include "config.w32.h"
#else
#include <php_config.h>
#endif
#include "php_standard.h"
#include "php_string.h"
#include "SAPI.h"
#if HAVE_LOCALE_H
#include <locale.h>
#endif
#if HAVE_LANGINFO_H
#include <langinfo.h>
#endif
#include <zend_hash.h>
#include "html_tables.h"
/* Macro for disabling flag of translation of non-basic entities where this isn't supported.
* Not appropriate for html_entity_decode/htmlspecialchars_decode */
#define LIMIT_ALL(all, doctype, charset) do { \
(all) = (all) && !CHARSET_PARTIAL_SUPPORT((charset)) && ((doctype) != ENT_HTML_DOC_XML1); \
} while (0)
#define MB_FAILURE(pos, advance) do { \
*cursor = pos + (advance); \
*status = FAILURE; \
return 0; \
} while (0)
#define CHECK_LEN(pos, chars_need) ((str_len - (pos)) >= (chars_need))
/* valid as single byte character or leading byte */
#define utf8_lead(c) ((c) < 0x80 || ((c) >= 0xC2 && (c) <= 0xF4))
/* whether it's actually valid depends on other stuff;
* this macro cannot check for non-shortest forms, surrogates or
* code points above 0x10FFFF */
#define utf8_trail(c) ((c) >= 0x80 && (c) <= 0xBF)
#define gb2312_lead(c) ((c) != 0x8E && (c) != 0x8F && (c) != 0xA0 && (c) != 0xFF)
#define gb2312_trail(c) ((c) >= 0xA1 && (c) <= 0xFE)
#define sjis_lead(c) ((c) != 0x80 && (c) != 0xA0 && (c) < 0xFD)
#define sjis_trail(c) ((c) >= 0x40 && (c) != 0x7F && (c) < 0xFD)
/* {{{ get_next_char
*/
static inline unsigned int get_next_char(
enum entity_charset charset,
const unsigned char *str,
size_t str_len,
size_t *cursor,
int *status)
{
size_t pos = *cursor;
unsigned int this_char = 0;
*status = SUCCESS;
assert(pos <= str_len);
if (!CHECK_LEN(pos, 1))
MB_FAILURE(pos, 1);
switch (charset) {
case cs_utf_8:
{
/* We'll follow strategy 2. from section 3.6.1 of UTR #36:
* "In a reported illegal byte sequence, do not include any
* non-initial byte that encodes a valid character or is a leading
* byte for a valid sequence." */
unsigned char c;
c = str[pos];
if (c < 0x80) {
this_char = c;
pos++;
} else if (c < 0xc2) {
MB_FAILURE(pos, 1);
} else if (c < 0xe0) {
if (!CHECK_LEN(pos, 2))
MB_FAILURE(pos, 1);
if (!utf8_trail(str[pos + 1])) {
MB_FAILURE(pos, utf8_lead(str[pos + 1]) ? 1 : 2);
}
this_char = ((c & 0x1f) << 6) | (str[pos + 1] & 0x3f);
if (this_char < 0x80) { /* non-shortest form */
MB_FAILURE(pos, 2);
}
pos += 2;
} else if (c < 0xf0) {
size_t avail = str_len - pos;
if (avail < 3 ||
!utf8_trail(str[pos + 1]) || !utf8_trail(str[pos + 2])) {
if (avail < 2 || utf8_lead(str[pos + 1]))
MB_FAILURE(pos, 1);
else if (avail < 3 || utf8_lead(str[pos + 2]))
MB_FAILURE(pos, 2);
else
MB_FAILURE(pos, 3);
}
this_char = ((c & 0x0f) << 12) | ((str[pos + 1] & 0x3f) << 6) | (str[pos + 2] & 0x3f);
if (this_char < 0x800) { /* non-shortest form */
MB_FAILURE(pos, 3);
} else if (this_char >= 0xd800 && this_char <= 0xdfff) { /* surrogate */
MB_FAILURE(pos, 3);
}
pos += 3;
} else if (c < 0xf5) {
size_t avail = str_len - pos;
if (avail < 4 ||
!utf8_trail(str[pos + 1]) || !utf8_trail(str[pos + 2]) ||
!utf8_trail(str[pos + 3])) {
if (avail < 2 || utf8_lead(str[pos + 1]))
MB_FAILURE(pos, 1);
else if (avail < 3 || utf8_lead(str[pos + 2]))
MB_FAILURE(pos, 2);
else if (avail < 4 || utf8_lead(str[pos + 3]))
MB_FAILURE(pos, 3);
else
MB_FAILURE(pos, 4);
}
this_char = ((c & 0x07) << 18) | ((str[pos + 1] & 0x3f) << 12) | ((str[pos + 2] & 0x3f) << 6) | (str[pos + 3] & 0x3f);
if (this_char < 0x10000 || this_char > 0x10FFFF) { /* non-shortest form or outside range */
MB_FAILURE(pos, 4);
}
pos += 4;
} else {
MB_FAILURE(pos, 1);
}
}
break;
case cs_big5:
/* reference http://demo.icu-project.org/icu-bin/convexp?conv=big5 */
{
unsigned char c = str[pos];
if (c >= 0x81 && c <= 0xFE) {
unsigned char next;
if (!CHECK_LEN(pos, 2))
MB_FAILURE(pos, 1);
next = str[pos + 1];
if ((next >= 0x40 && next <= 0x7E) ||
(next >= 0xA1 && next <= 0xFE)) {
this_char = (c << 8) | next;
} else {
MB_FAILURE(pos, 1);
}
pos += 2;
} else {
this_char = c;
pos += 1;
}
}
break;
case cs_big5hkscs:
{
unsigned char c = str[pos];
if (c >= 0x81 && c <= 0xFE) {
unsigned char next;
if (!CHECK_LEN(pos, 2))
MB_FAILURE(pos, 1);
next = str[pos + 1];
if ((next >= 0x40 && next <= 0x7E) ||
(next >= 0xA1 && next <= 0xFE)) {
this_char = (c << 8) | next;
} else if (next != 0x80 && next != 0xFF) {
MB_FAILURE(pos, 1);
} else {
MB_FAILURE(pos, 2);
}
pos += 2;
} else {
this_char = c;
pos += 1;
}
}
break;
case cs_gb2312: /* EUC-CN */
{
unsigned char c = str[pos];
if (c >= 0xA1 && c <= 0xFE) {
unsigned char next;
if (!CHECK_LEN(pos, 2))
MB_FAILURE(pos, 1);
next = str[pos + 1];
if (gb2312_trail(next)) {
this_char = (c << 8) | next;
} else if (gb2312_lead(next)) {
MB_FAILURE(pos, 1);
} else {
MB_FAILURE(pos, 2);
}
pos += 2;
} else if (gb2312_lead(c)) {
this_char = c;
pos += 1;
} else {
MB_FAILURE(pos, 1);
}
}
break;
case cs_sjis:
{
unsigned char c = str[pos];
if ((c >= 0x81 && c <= 0x9F) || (c >= 0xE0 && c <= 0xFC)) {
unsigned char next;
if (!CHECK_LEN(pos, 2))
MB_FAILURE(pos, 1);
next = str[pos + 1];
if (sjis_trail(next)) {
this_char = (c << 8) | next;
} else if (sjis_lead(next)) {
MB_FAILURE(pos, 1);
} else {
MB_FAILURE(pos, 2);
}
pos += 2;
} else if (c < 0x80 || (c >= 0xA1 && c <= 0xDF)) {
this_char = c;
pos += 1;
} else {
MB_FAILURE(pos, 1);
}
}
break;
case cs_eucjp:
{
unsigned char c = str[pos];
if (c >= 0xA1 && c <= 0xFE) {
unsigned next;
if (!CHECK_LEN(pos, 2))
MB_FAILURE(pos, 1);
next = str[pos + 1];
if (next >= 0xA1 && next <= 0xFE) {
/* this a jis kanji char */
this_char = (c << 8) | next;
} else {
MB_FAILURE(pos, (next != 0xA0 && next != 0xFF) ? 1 : 2);
}
pos += 2;
} else if (c == 0x8E) {
unsigned next;
if (!CHECK_LEN(pos, 2))
MB_FAILURE(pos, 1);
next = str[pos + 1];
if (next >= 0xA1 && next <= 0xDF) {
/* JIS X 0201 kana */
this_char = (c << 8) | next;
} else {
MB_FAILURE(pos, (next != 0xA0 && next != 0xFF) ? 1 : 2);
}
pos += 2;
} else if (c == 0x8F) {
size_t avail = str_len - pos;
if (avail < 3 || !(str[pos + 1] >= 0xA1 && str[pos + 1] <= 0xFE) ||
!(str[pos + 2] >= 0xA1 && str[pos + 2] <= 0xFE)) {
if (avail < 2 || (str[pos + 1] != 0xA0 && str[pos + 1] != 0xFF))
MB_FAILURE(pos, 1);
else if (avail < 3 || (str[pos + 2] != 0xA0 && str[pos + 2] != 0xFF))
MB_FAILURE(pos, 2);
else
MB_FAILURE(pos, 3);
} else {
/* JIS X 0212 hojo-kanji */
this_char = (c << 16) | (str[pos + 1] << 8) | str[pos + 2];
}
pos += 3;
} else if (c != 0xA0 && c != 0xFF) {
/* character encoded in 1 code unit */
this_char = c;
pos += 1;
} else {
MB_FAILURE(pos, 1);
}
}
break;
default:
/* single-byte charsets */
this_char = str[pos++];
break;
}
*cursor = pos;
return this_char;
}
/* }}} */
/* {{{ php_next_utf8_char
* Public interface for get_next_char used with UTF-8 */
PHPAPI unsigned int php_next_utf8_char(
const unsigned char *str,
size_t str_len,
size_t *cursor,
int *status)
{
return get_next_char(cs_utf_8, str, str_len, cursor, status);
}
/* }}} */
/* {{{ entity_charset determine_charset
* returns the charset identifier based on current locale or a hint.
* defaults to UTF-8 */
static enum entity_charset determine_charset(char *charset_hint TSRMLS_DC)
{
int i;
enum entity_charset charset = cs_utf_8;
int len = 0;
const zend_encoding *zenc;
/* Default is now UTF-8 */
if (charset_hint == NULL)
return cs_utf_8;
if ((len = strlen(charset_hint)) != 0) {
goto det_charset;
}
zenc = zend_multibyte_get_internal_encoding(TSRMLS_C);
if (zenc != NULL) {
charset_hint = (char *)zend_multibyte_get_encoding_name(zenc);
if (charset_hint != NULL && (len=strlen(charset_hint)) != 0) {
if ((len == 4) /* sizeof (none|auto|pass) */ &&
(!memcmp("pass", charset_hint, 4) ||
!memcmp("auto", charset_hint, 4) ||
!memcmp("auto", charset_hint, 4))) {
charset_hint = NULL;
len = 0;
} else {
goto det_charset;
}
}
}
charset_hint = SG(default_charset);
if (charset_hint != NULL && (len=strlen(charset_hint)) != 0) {
goto det_charset;
}
/* try to detect the charset for the locale */
#if HAVE_NL_LANGINFO && HAVE_LOCALE_H && defined(CODESET)
charset_hint = nl_langinfo(CODESET);
if (charset_hint != NULL && (len=strlen(charset_hint)) != 0) {
goto det_charset;
}
#endif
#if HAVE_LOCALE_H
/* try to figure out the charset from the locale */
{
char *localename;
char *dot, *at;
/* lang[_territory][.codeset][@modifier] */
localename = setlocale(LC_CTYPE, NULL);
dot = strchr(localename, '.');
if (dot) {
dot++;
/* locale specifies a codeset */
at = strchr(dot, '@');
if (at)
len = at - dot;
else
len = strlen(dot);
charset_hint = dot;
} else {
/* no explicit name; see if the name itself
* is the charset */
charset_hint = localename;
len = strlen(charset_hint);
}
}
#endif
det_charset:
if (charset_hint) {
int found = 0;
/* now walk the charset map and look for the codeset */
for (i = 0; charset_map[i].codeset; i++) {
if (len == strlen(charset_map[i].codeset) && strncasecmp(charset_hint, charset_map[i].codeset, len) == 0) {
charset = charset_map[i].charset;
found = 1;
break;
}
}
if (!found) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "charset `%s' not supported, assuming utf-8",
charset_hint);
}
}
return charset;
}
/* }}} */
/* {{{ php_utf32_utf8 */
static inline size_t php_utf32_utf8(unsigned char *buf, unsigned k)
{
size_t retval = 0;
/* assert(0x0 <= k <= 0x10FFFF); */
if (k < 0x80) {
buf[0] = k;
retval = 1;
} else if (k < 0x800) {
buf[0] = 0xc0 | (k >> 6);
buf[1] = 0x80 | (k & 0x3f);
retval = 2;
} else if (k < 0x10000) {
buf[0] = 0xe0 | (k >> 12);
buf[1] = 0x80 | ((k >> 6) & 0x3f);
buf[2] = 0x80 | (k & 0x3f);
retval = 3;
} else {
buf[0] = 0xf0 | (k >> 18);
buf[1] = 0x80 | ((k >> 12) & 0x3f);
buf[2] = 0x80 | ((k >> 6) & 0x3f);
buf[3] = 0x80 | (k & 0x3f);
retval = 4;
}
/* UTF-8 has been restricted to max 4 bytes since RFC 3629 */
return retval;
}
/* }}} */
/* {{{ php_mb2_int_to_char
* Convert back big endian int representation of sequence of one or two 8-bit code units. */
static inline size_t php_mb2_int_to_char(unsigned char *buf, unsigned k)
{
assert(k <= 0xFFFFU);
/* one or two bytes */
if (k <= 0xFFU) { /* 1 */
buf[0] = k;
return 1U;
} else { /* 2 */
buf[0] = k >> 8;
buf[1] = k & 0xFFU;
return 2U;
}
}
/* }}} */
/* {{{ php_mb3_int_to_char
* Convert back big endian int representation of sequence of one to three 8-bit code units.
* For EUC-JP. */
static inline size_t php_mb3_int_to_char(unsigned char *buf, unsigned k)
{
assert(k <= 0xFFFFFFU);
/* one to three bytes */
if (k <= 0xFFU) { /* 1 */
buf[0] = k;
return 1U;
} else if (k <= 0xFFFFU) { /* 2 */
buf[0] = k >> 8;
buf[1] = k & 0xFFU;
return 2U;
} else {
buf[0] = k >> 16;
buf[1] = (k >> 8) & 0xFFU;
buf[2] = k & 0xFFU;
return 3U;
}
}
/* }}} */
/* {{{ unimap_bsearc_cmp
* Binary search of unicode code points in unicode <--> charset mapping.
* Returns the code point in the target charset (whose mapping table was given) or 0 if
* the unicode code point is not in the table.
*/
static inline unsigned char unimap_bsearch(const uni_to_enc *table, unsigned code_key_a, size_t num)
{
const uni_to_enc *l = table,
*h = &table[num-1],
*m;
unsigned short code_key;
/* we have no mappings outside the BMP */
if (code_key_a > 0xFFFFU)
return 0;
code_key = (unsigned short) code_key_a;
while (l <= h) {
m = l + (h - l) / 2;
if (code_key < m->un_code_point)
h = m - 1;
else if (code_key > m->un_code_point)
l = m + 1;
else
return m->cs_code;
}
return 0;
}
/* }}} */
/* {{{ map_from_unicode */
static inline int map_from_unicode(unsigned code, enum entity_charset charset, unsigned *res)
{
unsigned char found;
const uni_to_enc *table;
size_t table_size;
switch (charset) {
case cs_8859_1:
/* identity mapping of code points to unicode */
if (code > 0xFF) {
return FAILURE;
}
*res = code;
break;
case cs_8859_5:
if (code <= 0xA0 || code == 0xAD /* soft hyphen */) {
*res = code;
} else if (code == 0x2116) {
*res = 0xF0; /* numero sign */
} else if (code == 0xA7) {
*res = 0xFD; /* section sign */
} else if (code >= 0x0401 && code <= 0x044F) {
if (code == 0x040D || code == 0x0450 || code == 0x045D)
return FAILURE;
*res = code - 0x360;
} else {
return FAILURE;
}
break;
case cs_8859_15:
if (code < 0xA4 || (code > 0xBE && code <= 0xFF)) {
*res = code;
} else { /* between A4 and 0xBE */
found = unimap_bsearch(unimap_iso885915,
code, sizeof(unimap_iso885915) / sizeof(*unimap_iso885915));
if (found)
*res = found;
else
return FAILURE;
}
break;
case cs_cp1252:
if (code <= 0x7F || (code >= 0xA0 && code <= 0xFF)) {
*res = code;
} else {
found = unimap_bsearch(unimap_win1252,
code, sizeof(unimap_win1252) / sizeof(*unimap_win1252));
if (found)
*res = found;
else
return FAILURE;
}
break;
case cs_macroman:
if (code == 0x7F)
return FAILURE;
table = unimap_macroman;
table_size = sizeof(unimap_macroman) / sizeof(*unimap_macroman);
goto table_over_7F;
case cs_cp1251:
table = unimap_win1251;
table_size = sizeof(unimap_win1251) / sizeof(*unimap_win1251);
goto table_over_7F;
case cs_koi8r:
table = unimap_koi8r;
table_size = sizeof(unimap_koi8r) / sizeof(*unimap_koi8r);
goto table_over_7F;
case cs_cp866:
table = unimap_cp866;
table_size = sizeof(unimap_cp866) / sizeof(*unimap_cp866);
table_over_7F:
if (code <= 0x7F) {
*res = code;
} else {
found = unimap_bsearch(table, code, table_size);
if (found)
*res = found;
else
return FAILURE;
}
break;
/* from here on, only map the possible characters in the ASCII range.
* to improve support here, it's a matter of building the unicode mappings.
* See <http://www.unicode.org/Public/6.0.0/ucd/Unihan.zip> */
case cs_sjis:
case cs_eucjp:
/* we interpret 0x5C as the Yen symbol. This is not universal.
* See <http://www.w3.org/Submission/japanese-xml/#ambiguity_of_yen> */
if (code >= 0x20 && code <= 0x7D) {
if (code == 0x5C)
return FAILURE;
*res = code;
} else {
return FAILURE;
}
break;
case cs_big5:
case cs_big5hkscs:
case cs_gb2312:
if (code >= 0x20 && code <= 0x7D) {
*res = code;
} else {
return FAILURE;
}
break;
default:
return FAILURE;
}
return SUCCESS;
}
/* }}} */
/* {{{ */
static inline void map_to_unicode(unsigned code, const enc_to_uni *table, unsigned *res)
{
/* only single byte encodings are currently supported; assumed code <= 0xFF */
*res = table->inner[ENT_ENC_TO_UNI_STAGE1(code)]->uni_cp[ENT_ENC_TO_UNI_STAGE2(code)];
}
/* }}} */
/* {{{ unicode_cp_is_allowed */
static inline int unicode_cp_is_allowed(unsigned uni_cp, int document_type)
{
/* XML 1.0 HTML 4.01 HTML 5
* 0x09..0x0A 0x09..0x0A 0x09..0x0A
* 0x0D 0x0D 0x0C..0x0D
* 0x0020..0xD7FF 0x20..0x7E 0x20..0x7E
* 0x00A0..0xD7FF 0x00A0..0xD7FF
* 0xE000..0xFFFD 0xE000..0x10FFFF 0xE000..0xFDCF
* 0x010000..0x10FFFF 0xFDF0..0x10FFFF (*)
*
* (*) exclude code points where ((code & 0xFFFF) >= 0xFFFE)
*
* References:
* XML 1.0: <http://www.w3.org/TR/REC-xml/#charsets>
* HTML 4.01: <http://www.w3.org/TR/1999/PR-html40-19990824/sgml/sgmldecl.html>
* HTML 5: <http://dev.w3.org/html5/spec/Overview.html#preprocessing-the-input-stream>
*
* Not sure this is the relevant part for HTML 5, though. I opted to
* disallow the characters that would result in a parse error when
* preprocessing of the input stream. See also section 8.1.3.
*
* It's unclear if XHTML 1.0 allows C1 characters. I'll opt to apply to
* XHTML 1.0 the same rules as for XML 1.0.
* See <http://cmsmcq.com/2007/C1.xml>.
*/
switch (document_type) {
case ENT_HTML_DOC_HTML401:
return (uni_cp >= 0x20 && uni_cp <= 0x7E) ||
(uni_cp == 0x0A || uni_cp == 0x09 || uni_cp == 0x0D) ||
(uni_cp >= 0xA0 && uni_cp <= 0xD7FF) ||
(uni_cp >= 0xE000 && uni_cp <= 0x10FFFF);
case ENT_HTML_DOC_HTML5:
return (uni_cp >= 0x20 && uni_cp <= 0x7E) ||
(uni_cp >= 0x09 && uni_cp <= 0x0D && uni_cp != 0x0B) || /* form feed U+0C allowed */
(uni_cp >= 0xA0 && uni_cp <= 0xD7FF) ||
(uni_cp >= 0xE000 && uni_cp <= 0x10FFFF &&
((uni_cp & 0xFFFF) < 0xFFFE) && /* last two of each plane (nonchars) disallowed */
(uni_cp < 0xFDD0 || uni_cp > 0xFDEF)); /* U+FDD0-U+FDEF (nonchars) disallowed */
case ENT_HTML_DOC_XHTML:
case ENT_HTML_DOC_XML1:
return (uni_cp >= 0x20 && uni_cp <= 0xD7FF) ||
(uni_cp == 0x0A || uni_cp == 0x09 || uni_cp == 0x0D) ||
(uni_cp >= 0xE000 && uni_cp <= 0x10FFFF && uni_cp != 0xFFFE && uni_cp != 0xFFFF);
default:
return 1;
}
}
/* }}} */
/* {{{ unicode_cp_is_allowed */
static inline int numeric_entity_is_allowed(unsigned uni_cp, int document_type)
{
/* less restrictive than unicode_cp_is_allowed */
switch (document_type) {
case ENT_HTML_DOC_HTML401:
/* all non-SGML characters (those marked with UNUSED in DESCSET) should be
* representable with numeric entities */
return uni_cp <= 0x10FFFF;
case ENT_HTML_DOC_HTML5:
/* 8.1.4. The numeric character reference forms described above are allowed to
* reference any Unicode code point other than U+0000, U+000D, permanently
* undefined Unicode characters (noncharacters), and control characters other
* than space characters (U+0009, U+000A, U+000C and U+000D) */
/* seems to allow surrogate characters, then */
return (uni_cp >= 0x20 && uni_cp <= 0x7E) ||
(uni_cp >= 0x09 && uni_cp <= 0x0C && uni_cp != 0x0B) || /* form feed U+0C allowed, but not U+0D */
(uni_cp >= 0xA0 && uni_cp <= 0x10FFFF &&
((uni_cp & 0xFFFF) < 0xFFFE) && /* last two of each plane (nonchars) disallowed */
(uni_cp < 0xFDD0 || uni_cp > 0xFDEF)); /* U+FDD0-U+FDEF (nonchars) disallowed */
case ENT_HTML_DOC_XHTML:
case ENT_HTML_DOC_XML1:
/* OTOH, XML 1.0 requires "character references to match the production for Char
* See <http://www.w3.org/TR/REC-xml/#NT-CharRef> */
return unicode_cp_is_allowed(uni_cp, document_type);
default:
return 1;
}
}
/* }}} */
/* {{{ process_numeric_entity
* Auxiliary function to traverse_for_entities.
* On input, *buf should point to the first character after # and on output, it's the last
* byte read, no matter if there was success or insuccess.
*/
static inline int process_numeric_entity(const char **buf, unsigned *code_point)
{
long code_l;
int hexadecimal = (**buf == 'x' || **buf == 'X'); /* TODO: XML apparently disallows "X" */
char *endptr;
if (hexadecimal && (**buf != '\0'))
(*buf)++;
/* strtol allows whitespace and other stuff in the beginning
* we're not interested */
if ((hexadecimal && !isxdigit(**buf)) ||
(!hexadecimal && !isdigit(**buf))) {
return FAILURE;
}
code_l = strtol(*buf, &endptr, hexadecimal ? 16 : 10);
/* we're guaranteed there were valid digits, so *endptr > buf */
*buf = endptr;
if (**buf != ';')
return FAILURE;
/* many more are invalid, but that depends on whether it's HTML
* (and which version) or XML. */
if (code_l > 0x10FFFFL)
return FAILURE;
if (code_point != NULL)
*code_point = (unsigned)code_l;
return SUCCESS;
}
/* }}} */
/* {{{ process_named_entity */
static inline int process_named_entity_html(const char **buf, const char **start, size_t *length)
{
*start = *buf;
/* "&" is represented by a 0x26 in all supported encodings. That means
* the byte after represents a character or is the leading byte of an
* sequence of 8-bit code units. If in the ranges below, it represents
* necessarily a alpha character because none of the supported encodings
* has an overlap with ASCII in the leading byte (only on the second one) */
while ((**buf >= 'a' && **buf <= 'z') ||
(**buf >= 'A' && **buf <= 'Z') ||
(**buf >= '0' && **buf <= '9')) {
(*buf)++;
}
if (**buf != ';')
return FAILURE;
/* cast to size_t OK as the quantity is always non-negative */
*length = *buf - *start;
if (*length == 0)
return FAILURE;
return SUCCESS;
}
/* }}} */
/* {{{ resolve_named_entity_html */
static inline int resolve_named_entity_html(const char *start, size_t length, const entity_ht *ht, unsigned *uni_cp1, unsigned *uni_cp2)
{
const entity_cp_map *s;
ulong hash = zend_inline_hash_func(start, length);
s = ht->buckets[hash % ht->num_elems];
while (s->entity) {
if (s->entity_len == length) {
if (memcmp(start, s->entity, length) == 0) {
*uni_cp1 = s->codepoint1;
*uni_cp2 = s->codepoint2;
return SUCCESS;
}
}
s++;
}
return FAILURE;
}
/* }}} */
static inline size_t write_octet_sequence(unsigned char *buf, enum entity_charset charset, unsigned code) {
/* code is not necessarily a unicode code point */
switch (charset) {
case cs_utf_8:
return php_utf32_utf8(buf, code);
case cs_8859_1:
case cs_cp1252:
case cs_8859_15:
case cs_koi8r:
case cs_cp1251:
case cs_8859_5:
case cs_cp866:
case cs_macroman:
/* single byte stuff */
*buf = code;
return 1;
case cs_big5:
case cs_big5hkscs:
case cs_sjis:
case cs_gb2312:
/* we don't have complete unicode mappings for these yet in entity_decode,
* and we opt to pass through the octet sequences for these in htmlentities
* instead of converting to an int and then converting back. */
#if 0
return php_mb2_int_to_char(buf, code);
#else
#ifdef ZEND_DEBUG
assert(code <= 0xFFU);
#endif
*buf = code;
return 1;
#endif
case cs_eucjp:
#if 0 /* idem */
return php_mb2_int_to_char(buf, code);
#else
#ifdef ZEND_DEBUG
assert(code <= 0xFFU);
#endif
*buf = code;
return 1;
#endif
default:
assert(0);
return 0;
}
}
/* {{{ traverse_for_entities
* Auxiliary function to php_unescape_html_entities().
* - The argument "all" determines if all numeric entities are decode or only those
* that correspond to quotes (depending on quote_style).
*/
/* maximum expansion (factor 1.2) for HTML 5 with ≫⃒ and ≪⃒ */
/* +2 is 1 because of rest (probably unnecessary), 1 because of terminating 0 */
#define TRAVERSE_FOR_ENTITIES_EXPAND_SIZE(oldlen) ((oldlen) + (oldlen) / 5 + 2)
static void traverse_for_entities(
const char *old,
size_t oldlen,
char *ret, /* should have allocated TRAVERSE_FOR_ENTITIES_EXPAND_SIZE(olden) */
size_t *retlen,
int all,
int flags,
const entity_ht *inv_map,
enum entity_charset charset)
{
const char *p,
*lim;
char *q;
int doctype = flags & ENT_HTML_DOC_TYPE_MASK;
lim = old + oldlen; /* terminator address */
assert(*lim == '\0');
for (p = old, q = ret; p < lim;) {
unsigned code, code2 = 0;
const char *next = NULL; /* when set, next > p, otherwise possible inf loop */
/* Shift JIS, Big5 and HKSCS use multi-byte encodings where an
* ASCII range byte can be part of a multi-byte sequence.
* However, they start at 0x40, therefore if we find a 0x26 byte,
* we're sure it represents the '&' character. */
/* assumes there are no single-char entities */
if (p[0] != '&' || (p + 3 >= lim)) {
*(q++) = *(p++);
continue;
}
/* now p[3] is surely valid and is no terminator */
/* numerical entity */
if (p[1] == '#') {
next = &p[2];
if (process_numeric_entity(&next, &code) == FAILURE)
goto invalid_code;
/* If we're in htmlspecialchars_decode, we're only decoding entities
* that represent &, <, >, " and '. Is this one of them? */
if (!all && (code > 63U ||
stage3_table_be_apos_00000[code].data.ent.entity == NULL))
goto invalid_code;
/* are we allowed to decode this entity in this document type?
* HTML 5 is the only that has a character that cannot be used in
* a numeric entity but is allowed literally (U+000D). The
* unoptimized version would be ... || !numeric_entity_is_allowed(code) */
if (!unicode_cp_is_allowed(code, doctype) ||
(doctype == ENT_HTML_DOC_HTML5 && code == 0x0D))
goto invalid_code;
} else {
const char *start;
size_t ent_len;
next = &p[1];
start = next;
if (process_named_entity_html(&next, &start, &ent_len) == FAILURE)
goto invalid_code;
if (resolve_named_entity_html(start, ent_len, inv_map, &code, &code2) == FAILURE) {
if (doctype == ENT_HTML_DOC_XHTML && ent_len == 4 && start[0] == 'a'
&& start[1] == 'p' && start[2] == 'o' && start[3] == 's') {
/* uses html4 inv_map, which doesn't include apos;. This is a
* hack to support it */
code = (unsigned) '\'';
} else {
goto invalid_code;
}
}
}
assert(*next == ';');
if (((code == '\'' && !(flags & ENT_HTML_QUOTE_SINGLE)) ||
(code == '"' && !(flags & ENT_HTML_QUOTE_DOUBLE)))
/* && code2 == '\0' always true for current maps */)
goto invalid_code;
/* UTF-8 doesn't need mapping (ISO-8859-1 doesn't either, but
* the call is needed to ensure the codepoint <= U+00FF) */
if (charset != cs_utf_8) {
/* replace unicode code point */
if (map_from_unicode(code, charset, &code) == FAILURE || code2 != 0)
goto invalid_code; /* not representable in target charset */
}
q += write_octet_sequence(q, charset, code);
if (code2) {
q += write_octet_sequence(q, charset, code2);
}
/* jump over the valid entity; may go beyond size of buffer; np */
p = next + 1;
continue;
invalid_code:
for (; p < next; p++) {
*(q++) = *p;
}
}
*q = '\0';
*retlen = (size_t)(q - ret);
}
/* }}} */
/* {{{ unescape_inverse_map */
static const entity_ht *unescape_inverse_map(int all, int flags)
{
int document_type = flags & ENT_HTML_DOC_TYPE_MASK;
if (all) {
switch (document_type) {
case ENT_HTML_DOC_HTML401:
case ENT_HTML_DOC_XHTML: /* but watch out for '...*/
return &ent_ht_html4;
case ENT_HTML_DOC_HTML5:
return &ent_ht_html5;
default:
return &ent_ht_be_apos;
}
} else {
switch (document_type) {
case ENT_HTML_DOC_HTML401:
return &ent_ht_be_noapos;
default:
return &ent_ht_be_apos;
}
}
}
/* }}} */
/* {{{ determine_entity_table
* Entity table to use. Note that entity tables are defined in terms of
* unicode code points */
static entity_table_opt determine_entity_table(int all, int doctype)
{
entity_table_opt retval = {NULL};
assert(!(doctype == ENT_HTML_DOC_XML1 && all));
if (all) {
retval.ms_table = (doctype == ENT_HTML_DOC_HTML5) ?
entity_ms_table_html5 : entity_ms_table_html4;
} else {
retval.table = (doctype == ENT_HTML_DOC_HTML401) ?
stage3_table_be_noapos_00000 : stage3_table_be_apos_00000;
}
return retval;
}
/* }}} */
/* {{{ php_unescape_html_entities
* The parameter "all" should be true to decode all possible entities, false to decode
* only the basic ones, i.e., those in basic_entities_ex + the numeric entities
* that correspond to quotes.
*/
PHPAPI char *php_unescape_html_entities(unsigned char *old, size_t oldlen, size_t *newlen, int all, int flags, char *hint_charset TSRMLS_DC)
{
size_t retlen;
char *ret;
enum entity_charset charset;
const entity_ht *inverse_map = NULL;
size_t new_size = TRAVERSE_FOR_ENTITIES_EXPAND_SIZE(oldlen);
if (all) {
charset = determine_charset(hint_charset TSRMLS_CC);
} else {
charset = cs_8859_1; /* charset shouldn't matter, use ISO-8859-1 for performance */
}
/* don't use LIMIT_ALL! */
if (oldlen > new_size) {
/* overflow, refuse to do anything */
ret = estrndup((char*)old, oldlen);
retlen = oldlen;
goto empty_source;
}
ret = emalloc(new_size);
*ret = '\0';
retlen = oldlen;
if (retlen == 0) {
goto empty_source;
}
inverse_map = unescape_inverse_map(all, flags);
/* replace numeric entities */
traverse_for_entities(old, oldlen, ret, &retlen, all, flags, inverse_map, charset);
empty_source:
*newlen = retlen;
return ret;
}
/* }}} */
PHPAPI char *php_escape_html_entities(unsigned char *old, size_t oldlen, size_t *newlen, int all, int flags, char *hint_charset TSRMLS_DC)
{
return php_escape_html_entities_ex(old, oldlen, newlen, all, flags, hint_charset, 1 TSRMLS_CC);
}
/* {{{ find_entity_for_char */
static inline void find_entity_for_char(
unsigned int k,
enum entity_charset charset,
const entity_stage1_row *table,
const unsigned char **entity,
size_t *entity_len,
unsigned char *old,
size_t oldlen,
size_t *cursor)
{
unsigned stage1_idx = ENT_STAGE1_INDEX(k);
const entity_stage3_row *c;
if (stage1_idx > 0x1D) {
*entity = NULL;
*entity_len = 0;
return;
}
c = &table[stage1_idx][ENT_STAGE2_INDEX(k)][ENT_STAGE3_INDEX(k)];
if (!c->ambiguous) {
*entity = (const unsigned char *)c->data.ent.entity;
*entity_len = c->data.ent.entity_len;
} else {
/* peek at next char */
size_t cursor_before = *cursor;
int status = SUCCESS;
unsigned next_char;
if (!(*cursor < oldlen))
goto no_suitable_2nd;
next_char = get_next_char(charset, old, oldlen, cursor, &status);
if (status == FAILURE)
goto no_suitable_2nd;
{
const entity_multicodepoint_row *s, *e;
s = &c->data.multicodepoint_table[1];
e = s - 1 + c->data.multicodepoint_table[0].leading_entry.size;
/* we could do a binary search but it's not worth it since we have
* at most two entries... */
for ( ; s <= e; s++) {
if (s->normal_entry.second_cp == next_char) {
*entity = s->normal_entry.entity;
*entity_len = s->normal_entry.entity_len;
return;
}
}
}
no_suitable_2nd:
*cursor = cursor_before;
*entity = (const unsigned char *)
c->data.multicodepoint_table[0].leading_entry.default_entity;
*entity_len = c->data.multicodepoint_table[0].leading_entry.default_entity_len;
}
}
/* }}} */
/* {{{ find_entity_for_char_basic */
static inline void find_entity_for_char_basic(
unsigned int k,
const entity_stage3_row *table,
const unsigned char **entity,
size_t *entity_len)
{
if (k >= 64U) {
*entity = NULL;
*entity_len = 0;
return;
}
*entity = table[k].data.ent.entity;
*entity_len = table[k].data.ent.entity_len;
}
/* }}} */
/* {{{ php_escape_html_entities
*/
PHPAPI char *php_escape_html_entities_ex(unsigned char *old, size_t oldlen, size_t *newlen, int all, int flags, char *hint_charset, zend_bool double_encode TSRMLS_DC)
{
size_t cursor, maxlen, len;
char *replaced;
enum entity_charset charset = determine_charset(hint_charset TSRMLS_CC);
int doctype = flags & ENT_HTML_DOC_TYPE_MASK;
entity_table_opt entity_table;
const enc_to_uni *to_uni_table = NULL;
const entity_ht *inv_map = NULL; /* used for !double_encode */
/* only used if flags includes ENT_HTML_IGNORE_ERRORS or ENT_HTML_SUBSTITUTE_DISALLOWED_CHARS */
const unsigned char *replacement = NULL;
size_t replacement_len = 0;
if (all) { /* replace with all named entities */
if (CHARSET_PARTIAL_SUPPORT(charset)) {
php_error_docref0(NULL TSRMLS_CC, E_STRICT, "Only basic entities "
"substitution is supported for multi-byte encodings other than UTF-8; "
"functionality is equivalent to htmlspecialchars");
}
LIMIT_ALL(all, doctype, charset);
}
entity_table = determine_entity_table(all, doctype);
if (all && !CHARSET_UNICODE_COMPAT(charset)) {
to_uni_table = enc_to_uni_index[charset];
}
if (!double_encode) {
/* first arg is 1 because we want to identify valid named entities
* even if we are only encoding the basic ones */
inv_map = unescape_inverse_map(1, flags);
}
if (flags & (ENT_HTML_SUBSTITUTE_ERRORS | ENT_HTML_SUBSTITUTE_DISALLOWED_CHARS)) {
if (charset == cs_utf_8) {
replacement = (const unsigned char*)"\xEF\xBF\xBD";
replacement_len = sizeof("\xEF\xBF\xBD") - 1;
} else {
replacement = (const unsigned char*)"�";
replacement_len = sizeof("�") - 1;
}
}
/* initial estimate */
if (oldlen < 64) {
maxlen = 128;
} else {
maxlen = 2 * oldlen;
if (maxlen < oldlen) {
zend_error_noreturn(E_ERROR, "Input string is too long");
return NULL;
}
}
replaced = emalloc(maxlen + 1); /* adding 1 is safe: maxlen is even */
len = 0;
cursor = 0;
while (cursor < oldlen) {
const unsigned char *mbsequence = NULL;
size_t mbseqlen = 0,
cursor_before = cursor;
int status = SUCCESS;
unsigned int this_char = get_next_char(charset, old, oldlen, &cursor, &status);
/* guarantee we have at least 40 bytes to write.
* In HTML5, entities may take up to 33 bytes */
if (len > maxlen - 40) { /* maxlen can never be smaller than 128 */
replaced = safe_erealloc(replaced, maxlen , 1, 128 + 1);
maxlen += 128;
}
if (status == FAILURE) {
/* invalid MB sequence */
if (flags & ENT_HTML_IGNORE_ERRORS) {
continue;
} else if (flags & ENT_HTML_SUBSTITUTE_ERRORS) {
memcpy(&replaced[len], replacement, replacement_len);
len += replacement_len;
continue;
} else {
efree(replaced);
*newlen = 0;
return STR_EMPTY_ALLOC();
}
} else { /* SUCCESS */
mbsequence = &old[cursor_before];
mbseqlen = cursor - cursor_before;
}
if (this_char != '&') { /* no entity on this position */
const unsigned char *rep = NULL;
size_t rep_len = 0;
if (((this_char == '\'' && !(flags & ENT_HTML_QUOTE_SINGLE)) ||
(this_char == '"' && !(flags & ENT_HTML_QUOTE_DOUBLE))))
goto pass_char_through;
if (all) { /* false that CHARSET_PARTIAL_SUPPORT(charset) */
if (to_uni_table != NULL) {
/* !CHARSET_UNICODE_COMPAT therefore not UTF-8; since UTF-8
* is the only multibyte encoding with !CHARSET_PARTIAL_SUPPORT,
* we're using a single byte encoding */
map_to_unicode(this_char, to_uni_table, &this_char);
if (this_char == 0xFFFF) /* no mapping; pass through */
goto pass_char_through;
}
/* the cursor may advance */
find_entity_for_char(this_char, charset, entity_table.ms_table, &rep,
&rep_len, old, oldlen, &cursor);
} else {
find_entity_for_char_basic(this_char, entity_table.table, &rep, &rep_len);
}
if (rep != NULL) {
replaced[len++] = '&';
memcpy(&replaced[len], rep, rep_len);
len += rep_len;
replaced[len++] = ';';
} else {
/* we did not find an entity for this char.
* check for its validity, if its valid pass it unchanged */
if (flags & ENT_HTML_SUBSTITUTE_DISALLOWED_CHARS) {
if (CHARSET_UNICODE_COMPAT(charset)) {
if (!unicode_cp_is_allowed(this_char, doctype)) {
mbsequence = replacement;
mbseqlen = replacement_len;
}
} else if (to_uni_table) {
if (!all) /* otherwise we already did this */
map_to_unicode(this_char, to_uni_table, &this_char);
if (!unicode_cp_is_allowed(this_char, doctype)) {
mbsequence = replacement;
mbseqlen = replacement_len;
}
} else {
/* not a unicode code point, unless, coincidentally, it's in
* the 0x20..0x7D range (except 0x5C in sjis). We know nothing
* about other code points, because we have no tables. Since
* Unicode code points in that range are not disallowed in any
* document type, we could do nothing. However, conversion
* tables frequently map 0x00-0x1F to the respective C0 code
* points. Let's play it safe and admit that's the case */
if (this_char <= 0x7D &&
!unicode_cp_is_allowed(this_char, doctype)) {
mbsequence = replacement;
mbseqlen = replacement_len;
}
}
}
pass_char_through:
if (mbseqlen > 1) {
memcpy(replaced + len, mbsequence, mbseqlen);
len += mbseqlen;
} else {
replaced[len++] = mbsequence[0];
}
}
} else { /* this_char == '&' */
if (double_encode) {
encode_amp:
memcpy(&replaced[len], "&", sizeof("&") - 1);
len += sizeof("&") - 1;
} else { /* no double encode */
/* check if entity is valid */
size_t ent_len; /* not counting & or ; */
/* peek at next char */
if (old[cursor] == '#') { /* numeric entity */
unsigned code_point;
int valid;
char *pos = (char*)&old[cursor+1];
valid = process_numeric_entity((const char **)&pos, &code_point);
if (valid == FAILURE)
goto encode_amp;
if (flags & ENT_HTML_SUBSTITUTE_DISALLOWED_CHARS) {
if (!numeric_entity_is_allowed(code_point, doctype))
goto encode_amp;
}
ent_len = pos - (char*)&old[cursor];
} else { /* named entity */
/* check for vality of named entity */
const char *start = &old[cursor],
*next = start;
unsigned dummy1, dummy2;
if (process_named_entity_html(&next, &start, &ent_len) == FAILURE)
goto encode_amp;
if (resolve_named_entity_html(start, ent_len, inv_map, &dummy1, &dummy2) == FAILURE) {
if (!(doctype == ENT_HTML_DOC_XHTML && ent_len == 4 && start[0] == 'a'
&& start[1] == 'p' && start[2] == 'o' && start[3] == 's')) {
/* uses html4 inv_map, which doesn't include apos;. This is a
* hack to support it */
goto encode_amp;
}
}
}
/* checks passed; copy entity to result */
/* entity size is unbounded, we may need more memory */
/* at this point maxlen - len >= 40 */
if (maxlen - len < ent_len + 2 /* & and ; */) {
/* ent_len < oldlen, which is certainly <= SIZE_MAX/2 */
replaced = safe_erealloc(replaced, maxlen, 1, ent_len + 128 + 1);
maxlen += ent_len + 128;
}
replaced[len++] = '&';
memcpy(&replaced[len], &old[cursor], ent_len);
len += ent_len;
replaced[len++] = ';';
cursor += ent_len + 1;
}
}
}
replaced[len] = '\0';
*newlen = len;
return replaced;
}
/* }}} */
/* {{{ php_html_entities
*/
static void php_html_entities(INTERNAL_FUNCTION_PARAMETERS, int all)
{
char *str, *hint_charset = NULL;
int str_len, hint_charset_len = 0;
size_t new_len;
long flags = ENT_COMPAT;
char *replaced;
zend_bool double_encode = 1;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|ls!b", &str, &str_len, &flags, &hint_charset, &hint_charset_len, &double_encode) == FAILURE) {
return;
}
replaced = php_escape_html_entities_ex(str, str_len, &new_len, all, (int) flags, hint_charset, double_encode TSRMLS_CC);
RETVAL_STRINGL(replaced, (int)new_len, 0);
}
/* }}} */
#define HTML_SPECIALCHARS 0
#define HTML_ENTITIES 1
/* {{{ register_html_constants
*/
void register_html_constants(INIT_FUNC_ARGS)
{
REGISTER_LONG_CONSTANT("HTML_SPECIALCHARS", HTML_SPECIALCHARS, CONST_PERSISTENT|CONST_CS);
REGISTER_LONG_CONSTANT("HTML_ENTITIES", HTML_ENTITIES, CONST_PERSISTENT|CONST_CS);
REGISTER_LONG_CONSTANT("ENT_COMPAT", ENT_COMPAT, CONST_PERSISTENT|CONST_CS);
REGISTER_LONG_CONSTANT("ENT_QUOTES", ENT_QUOTES, CONST_PERSISTENT|CONST_CS);
REGISTER_LONG_CONSTANT("ENT_NOQUOTES", ENT_NOQUOTES, CONST_PERSISTENT|CONST_CS);
REGISTER_LONG_CONSTANT("ENT_IGNORE", ENT_IGNORE, CONST_PERSISTENT|CONST_CS);
REGISTER_LONG_CONSTANT("ENT_SUBSTITUTE", ENT_SUBSTITUTE, CONST_PERSISTENT|CONST_CS);
REGISTER_LONG_CONSTANT("ENT_DISALLOWED", ENT_DISALLOWED, CONST_PERSISTENT|CONST_CS);
REGISTER_LONG_CONSTANT("ENT_HTML401", ENT_HTML401, CONST_PERSISTENT|CONST_CS);
REGISTER_LONG_CONSTANT("ENT_XML1", ENT_XML1, CONST_PERSISTENT|CONST_CS);
REGISTER_LONG_CONSTANT("ENT_XHTML", ENT_XHTML, CONST_PERSISTENT|CONST_CS);
REGISTER_LONG_CONSTANT("ENT_HTML5", ENT_HTML5, CONST_PERSISTENT|CONST_CS);
}
/* }}} */
/* {{{ proto string htmlspecialchars(string string [, int quote_style[, string charset[, bool double_encode]]])
Convert special characters to HTML entities */
PHP_FUNCTION(htmlspecialchars)
{
php_html_entities(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0);
}
/* }}} */
/* {{{ proto string htmlspecialchars_decode(string string [, int quote_style])
Convert special HTML entities back to characters */
PHP_FUNCTION(htmlspecialchars_decode)
{
char *str;
int str_len;
size_t new_len = 0;
long quote_style = ENT_COMPAT;
char *replaced;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|l", &str, &str_len, "e_style) == FAILURE) {
return;
}
replaced = php_unescape_html_entities(str, str_len, &new_len, 0 /*!all*/, quote_style, NULL TSRMLS_CC);
if (replaced) {
RETURN_STRINGL(replaced, (int)new_len, 0);
}
RETURN_FALSE;
}
/* }}} */
/* {{{ proto string html_entity_decode(string string [, int quote_style][, string charset])
Convert all HTML entities to their applicable characters */
PHP_FUNCTION(html_entity_decode)
{
char *str, *hint_charset = NULL;
int str_len, hint_charset_len = 0;
size_t new_len = 0;
long quote_style = ENT_COMPAT;
char *replaced;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|ls", &str, &str_len,
"e_style, &hint_charset, &hint_charset_len) == FAILURE) {
return;
}
replaced = php_unescape_html_entities(str, str_len, &new_len, 1 /*all*/, quote_style, hint_charset TSRMLS_CC);
if (replaced) {
RETURN_STRINGL(replaced, (int)new_len, 0);
}
RETURN_FALSE;
}
/* }}} */
/* {{{ proto string htmlentities(string string [, int quote_style[, string charset[, bool double_encode]]])
Convert all applicable characters to HTML entities */
PHP_FUNCTION(htmlentities)
{
php_html_entities(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1);
}
/* }}} */
/* {{{ write_s3row_data */
static inline void write_s3row_data(
const entity_stage3_row *r,
unsigned orig_cp,
enum entity_charset charset,
zval *arr)
{
char key[9] = ""; /* two unicode code points in UTF-8 */
char entity[LONGEST_ENTITY_LENGTH + 2] = {'&'};
size_t written_k1;
written_k1 = write_octet_sequence(key, charset, orig_cp);
if (!r->ambiguous) {
size_t l = r->data.ent.entity_len;
memcpy(&entity[1], r->data.ent.entity, l);
entity[l + 1] = ';';
add_assoc_stringl_ex(arr, key, written_k1 + 1, entity, l + 2, 1);
} else {
unsigned i,
num_entries;
const entity_multicodepoint_row *mcpr = r->data.multicodepoint_table;
if (mcpr[0].leading_entry.default_entity != NULL) {
size_t l = mcpr[0].leading_entry.default_entity_len;
memcpy(&entity[1], mcpr[0].leading_entry.default_entity, l);
entity[l + 1] = ';';
add_assoc_stringl_ex(arr, key, written_k1 + 1, entity, l + 2, 1);
}
num_entries = mcpr[0].leading_entry.size;
for (i = 1; i <= num_entries; i++) {
size_t l,
written_k2;
unsigned uni_cp,
spe_cp;
uni_cp = mcpr[i].normal_entry.second_cp;
l = mcpr[i].normal_entry.entity_len;
if (!CHARSET_UNICODE_COMPAT(charset)) {
if (map_from_unicode(uni_cp, charset, &spe_cp) == FAILURE)
continue; /* non representable in this charset */
} else {
spe_cp = uni_cp;
}
written_k2 = write_octet_sequence(&key[written_k1], charset, spe_cp);
memcpy(&entity[1], mcpr[i].normal_entry.entity, l);
entity[l + 1] = ';';
entity[l + 1] = '\0';
add_assoc_stringl_ex(arr, key, written_k1 + written_k2 + 1, entity, l + 1, 1);
}
}
}
/* }}} */
/* {{{ proto array get_html_translation_table([int table [, int flags [, string charset_hint]]])
Returns the internal translation table used by htmlspecialchars and htmlentities */
PHP_FUNCTION(get_html_translation_table)
{
long all = HTML_SPECIALCHARS,
flags = ENT_COMPAT;
int doctype;
entity_table_opt entity_table;
const enc_to_uni *to_uni_table = NULL;
char *charset_hint = NULL;
int charset_hint_len;
enum entity_charset charset;
/* in this function we have to jump through some loops because we're
* getting the translated table from data structures that are optimized for
* random access, not traversal */
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|lls",
&all, &flags, &charset_hint, &charset_hint_len) == FAILURE) {
return;
}
charset = determine_charset(charset_hint TSRMLS_CC);
doctype = flags & ENT_HTML_DOC_TYPE_MASK;
LIMIT_ALL(all, doctype, charset);
array_init(return_value);
entity_table = determine_entity_table(all, doctype);
if (all && !CHARSET_UNICODE_COMPAT(charset)) {
to_uni_table = enc_to_uni_index[charset];
}
if (all) { /* HTML_ENTITIES (actually, any non-zero value for 1st param) */
const entity_stage1_row *ms_table = entity_table.ms_table;
if (CHARSET_UNICODE_COMPAT(charset)) {
unsigned i, j, k,
max_i, max_j, max_k;
/* no mapping to unicode required */
if (CHARSET_SINGLE_BYTE(charset)) { /* ISO-8859-1 */
max_i = 1; max_j = 4; max_k = 64;
} else {
max_i = 0x1E; max_j = 64; max_k = 64;
}
for (i = 0; i < max_i; i++) {
if (ms_table[i] == empty_stage2_table)
continue;
for (j = 0; j < max_j; j++) {
if (ms_table[i][j] == empty_stage3_table)
continue;
for (k = 0; k < max_k; k++) {
const entity_stage3_row *r = &ms_table[i][j][k];
unsigned code;
if (r->data.ent.entity == NULL)
continue;
code = ENT_CODE_POINT_FROM_STAGES(i, j, k);
if (((code == '\'' && !(flags & ENT_HTML_QUOTE_SINGLE)) ||
(code == '"' && !(flags & ENT_HTML_QUOTE_DOUBLE))))
continue;
write_s3row_data(r, code, charset, return_value);
}
}
}
} else {
/* we have to iterate through the set of code points for this
* encoding and map them to unicode code points */
unsigned i;
for (i = 0; i <= 0xFF; i++) {
const entity_stage3_row *r;
unsigned uni_cp;
/* can be done before mapping, they're invariant */
if (((i == '\'' && !(flags & ENT_HTML_QUOTE_SINGLE)) ||
(i == '"' && !(flags & ENT_HTML_QUOTE_DOUBLE))))
continue;
map_to_unicode(i, to_uni_table, &uni_cp);
r = &ms_table[ENT_STAGE1_INDEX(uni_cp)][ENT_STAGE2_INDEX(uni_cp)][ENT_STAGE3_INDEX(uni_cp)];
if (r->data.ent.entity == NULL)
continue;
write_s3row_data(r, i, charset, return_value);
}
}
} else {
/* we could use sizeof(stage3_table_be_apos_00000) as well */
unsigned j,
numelems = sizeof(stage3_table_be_noapos_00000) /
sizeof(*stage3_table_be_noapos_00000);
for (j = 0; j < numelems; j++) {
const entity_stage3_row *r = &entity_table.table[j];
if (r->data.ent.entity == NULL)
continue;
if (((j == '\'' && !(flags & ENT_HTML_QUOTE_SINGLE)) ||
(j == '"' && !(flags & ENT_HTML_QUOTE_DOUBLE))))
continue;
/* charset is indifferent, used cs_8859_1 for efficiency */
write_s3row_data(r, j, cs_8859_1, return_value);
}
}
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/