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php_mbregex.c
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/*
+----------------------------------------------------------------------+
| Copyright (c) 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. |
+----------------------------------------------------------------------+
| Author: Tsukada Takuya <tsukada@fminn.nagano.nagano.jp> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#include "php_ini.h"
#ifdef HAVE_MBREGEX
#include "zend_smart_str.h"
#include "ext/standard/info.h"
#include "php_mbregex.h"
#include "mbstring.h"
#include "libmbfl/filters/mbfilter_utf8.h"
#include "php_onig_compat.h" /* must come prior to the oniguruma header */
#include <oniguruma.h>
#undef UChar
#if !defined(ONIGURUMA_VERSION_INT) || ONIGURUMA_VERSION_INT < 60800
typedef void OnigMatchParam;
#define onig_new_match_param() (NULL)
#define onig_initialize_match_param(x) (void)(x)
#define onig_set_match_stack_limit_size_of_match_param(x, y)
#define onig_set_retry_limit_in_match_of_match_param(x, y)
#define onig_free_match_param(x)
#define onig_search_with_param(reg, str, end, start, range, region, option, mp) \
onig_search(reg, str, end, start, range, region, option)
#define onig_match_with_param(re, str, end, at, region, option, mp) \
onig_match(re, str, end, at, region, option)
#endif
ZEND_EXTERN_MODULE_GLOBALS(mbstring)
struct _zend_mb_regex_globals {
OnigEncoding default_mbctype;
OnigEncoding current_mbctype;
const mbfl_encoding *current_mbctype_mbfl_encoding;
HashTable ht_rc;
zval search_str;
zval *search_str_val;
size_t search_pos;
php_mb_regex_t *search_re;
OnigRegion *search_regs;
OnigOptionType regex_default_options;
OnigSyntaxType *regex_default_syntax;
};
#define MBREX(g) (MBSTRG(mb_regex_globals)->g)
/* {{{ static void php_mb_regex_free_cache() */
static void php_mb_regex_free_cache(zval *el) {
onig_free((php_mb_regex_t *)Z_PTR_P(el));
}
/* }}} */
/* {{{ _php_mb_regex_globals_ctor */
static int _php_mb_regex_globals_ctor(zend_mb_regex_globals *pglobals)
{
pglobals->default_mbctype = ONIG_ENCODING_UTF8;
pglobals->current_mbctype = ONIG_ENCODING_UTF8;
pglobals->current_mbctype_mbfl_encoding = &mbfl_encoding_utf8;
ZVAL_UNDEF(&pglobals->search_str);
pglobals->search_re = (php_mb_regex_t*)NULL;
pglobals->search_pos = 0;
pglobals->search_regs = (OnigRegion*)NULL;
pglobals->regex_default_options = ONIG_OPTION_MULTILINE | ONIG_OPTION_SINGLELINE;
pglobals->regex_default_syntax = ONIG_SYNTAX_RUBY;
return SUCCESS;
}
/* }}} */
/* {{{ _php_mb_regex_globals_dtor */
static void _php_mb_regex_globals_dtor(zend_mb_regex_globals *pglobals)
{
}
/* }}} */
/* {{{ php_mb_regex_globals_alloc */
zend_mb_regex_globals *php_mb_regex_globals_alloc(void)
{
zend_mb_regex_globals *pglobals = pemalloc(
sizeof(zend_mb_regex_globals), 1);
if (SUCCESS != _php_mb_regex_globals_ctor(pglobals)) {
pefree(pglobals, 1);
return NULL;
}
return pglobals;
}
/* }}} */
/* {{{ php_mb_regex_globals_free */
void php_mb_regex_globals_free(zend_mb_regex_globals *pglobals)
{
if (!pglobals) {
return;
}
_php_mb_regex_globals_dtor(pglobals);
pefree(pglobals, 1);
}
/* }}} */
/* {{{ PHP_MINIT_FUNCTION(mb_regex) */
PHP_MINIT_FUNCTION(mb_regex)
{
char version[256];
onig_init();
snprintf(version, sizeof(version), "%d.%d.%d",
ONIGURUMA_VERSION_MAJOR, ONIGURUMA_VERSION_MINOR, ONIGURUMA_VERSION_TEENY);
REGISTER_STRING_CONSTANT("MB_ONIGURUMA_VERSION", version, CONST_CS | CONST_PERSISTENT);
return SUCCESS;
}
/* }}} */
/* {{{ PHP_MSHUTDOWN_FUNCTION(mb_regex) */
PHP_MSHUTDOWN_FUNCTION(mb_regex)
{
onig_end();
return SUCCESS;
}
/* }}} */
/* {{{ PHP_RINIT_FUNCTION(mb_regex) */
PHP_RINIT_FUNCTION(mb_regex)
{
if (!MBSTRG(mb_regex_globals)) return FAILURE;
zend_hash_init(&MBREX(ht_rc), 0, NULL, php_mb_regex_free_cache, 0);
return SUCCESS;
}
/* }}} */
/* {{{ PHP_RSHUTDOWN_FUNCTION(mb_regex) */
PHP_RSHUTDOWN_FUNCTION(mb_regex)
{
MBREX(current_mbctype) = MBREX(default_mbctype);
MBREX(current_mbctype_mbfl_encoding) = mbfl_name2encoding(php_mb_regex_get_default_mbctype());
if (!Z_ISUNDEF(MBREX(search_str))) {
zval_ptr_dtor(&MBREX(search_str));
ZVAL_UNDEF(&MBREX(search_str));
}
MBREX(search_pos) = 0;
MBREX(search_re) = NULL;
if (MBREX(search_regs) != NULL) {
onig_region_free(MBREX(search_regs), 1);
MBREX(search_regs) = (OnigRegion *)NULL;
}
zend_hash_destroy(&MBREX(ht_rc));
return SUCCESS;
}
/* }}} */
/* {{{ PHP_MINFO_FUNCTION(mb_regex) */
PHP_MINFO_FUNCTION(mb_regex)
{
char buf[32];
php_info_print_table_start();
php_info_print_table_row(2, "Multibyte (japanese) regex support", "enabled");
snprintf(buf, sizeof(buf), "%d.%d.%d",
ONIGURUMA_VERSION_MAJOR,
ONIGURUMA_VERSION_MINOR,
ONIGURUMA_VERSION_TEENY);
php_info_print_table_row(2, "Multibyte regex (oniguruma) version", buf);
php_info_print_table_end();
}
/* }}} */
/*
* encoding name resolver
*/
/* {{{ encoding name map */
typedef struct _php_mb_regex_enc_name_map_t {
const char *names;
OnigEncoding code;
} php_mb_regex_enc_name_map_t;
static const php_mb_regex_enc_name_map_t enc_name_map[] = {
#ifdef ONIG_ENCODING_EUC_JP
{
"EUC-JP\0EUCJP\0X-EUC-JP\0UJIS\0EUCJP\0EUCJP-WIN\0",
ONIG_ENCODING_EUC_JP
},
#endif
#ifdef ONIG_ENCODING_UTF8
{
"UTF-8\0UTF8\0",
ONIG_ENCODING_UTF8
},
#endif
#ifdef ONIG_ENCODING_UTF16_BE
{
"UTF-16\0UTF-16BE\0",
ONIG_ENCODING_UTF16_BE
},
#endif
#ifdef ONIG_ENCODING_UTF16_LE
{
"UTF-16LE\0",
ONIG_ENCODING_UTF16_LE
},
#endif
#ifdef ONIG_ENCODING_UTF32_BE
{
"UCS-4\0UTF-32\0UTF-32BE\0",
ONIG_ENCODING_UTF32_BE
},
#endif
#ifdef ONIG_ENCODING_UTF32_LE
{
"UCS-4LE\0UTF-32LE\0",
ONIG_ENCODING_UTF32_LE
},
#endif
#ifdef ONIG_ENCODING_SJIS
{
"SJIS\0CP932\0MS932\0SHIFT_JIS\0SJIS-WIN\0WINDOWS-31J\0",
ONIG_ENCODING_SJIS
},
#endif
#ifdef ONIG_ENCODING_BIG5
{
"BIG5\0BIG-5\0BIGFIVE\0CN-BIG5\0BIG-FIVE\0",
ONIG_ENCODING_BIG5
},
#endif
#ifdef ONIG_ENCODING_EUC_CN
{
"EUC-CN\0EUCCN\0EUC_CN\0GB-2312\0GB2312\0",
ONIG_ENCODING_EUC_CN
},
#endif
#ifdef ONIG_ENCODING_EUC_TW
{
"EUC-TW\0EUCTW\0EUC_TW\0",
ONIG_ENCODING_EUC_TW
},
#endif
#ifdef ONIG_ENCODING_EUC_KR
{
"EUC-KR\0EUCKR\0EUC_KR\0",
ONIG_ENCODING_EUC_KR
},
#endif
#if defined(ONIG_ENCODING_KOI8) && !PHP_ONIG_BAD_KOI8_ENTRY
{
"KOI8\0KOI-8\0",
ONIG_ENCODING_KOI8
},
#endif
#ifdef ONIG_ENCODING_KOI8_R
{
"KOI8R\0KOI8-R\0KOI-8R\0",
ONIG_ENCODING_KOI8_R
},
#endif
#ifdef ONIG_ENCODING_ISO_8859_1
{
"ISO-8859-1\0ISO8859-1\0ISO_8859_1\0ISO8859_1\0",
ONIG_ENCODING_ISO_8859_1
},
#endif
#ifdef ONIG_ENCODING_ISO_8859_2
{
"ISO-8859-2\0ISO8859-2\0ISO_8859_2\0ISO8859_2\0",
ONIG_ENCODING_ISO_8859_2
},
#endif
#ifdef ONIG_ENCODING_ISO_8859_3
{
"ISO-8859-3\0ISO8859-3\0ISO_8859_3\0ISO8859_3\0",
ONIG_ENCODING_ISO_8859_3
},
#endif
#ifdef ONIG_ENCODING_ISO_8859_4
{
"ISO-8859-4\0ISO8859-4\0ISO_8859_4\0ISO8859_4\0",
ONIG_ENCODING_ISO_8859_4
},
#endif
#ifdef ONIG_ENCODING_ISO_8859_5
{
"ISO-8859-5\0ISO8859-5\0ISO_8859_5\0ISO8859_5\0",
ONIG_ENCODING_ISO_8859_5
},
#endif
#ifdef ONIG_ENCODING_ISO_8859_6
{
"ISO-8859-6\0ISO8859-6\0ISO_8859_6\0ISO8859_6\0",
ONIG_ENCODING_ISO_8859_6
},
#endif
#ifdef ONIG_ENCODING_ISO_8859_7
{
"ISO-8859-7\0ISO8859-7\0ISO_8859_7\0ISO8859_7\0",
ONIG_ENCODING_ISO_8859_7
},
#endif
#ifdef ONIG_ENCODING_ISO_8859_8
{
"ISO-8859-8\0ISO8859-8\0ISO_8859_8\0ISO8859_8\0",
ONIG_ENCODING_ISO_8859_8
},
#endif
#ifdef ONIG_ENCODING_ISO_8859_9
{
"ISO-8859-9\0ISO8859-9\0ISO_8859_9\0ISO8859_9\0",
ONIG_ENCODING_ISO_8859_9
},
#endif
#ifdef ONIG_ENCODING_ISO_8859_10
{
"ISO-8859-10\0ISO8859-10\0ISO_8859_10\0ISO8859_10\0",
ONIG_ENCODING_ISO_8859_10
},
#endif
#ifdef ONIG_ENCODING_ISO_8859_11
{
"ISO-8859-11\0ISO8859-11\0ISO_8859_11\0ISO8859_11\0",
ONIG_ENCODING_ISO_8859_11
},
#endif
#ifdef ONIG_ENCODING_ISO_8859_13
{
"ISO-8859-13\0ISO8859-13\0ISO_8859_13\0ISO8859_13\0",
ONIG_ENCODING_ISO_8859_13
},
#endif
#ifdef ONIG_ENCODING_ISO_8859_14
{
"ISO-8859-14\0ISO8859-14\0ISO_8859_14\0ISO8859_14\0",
ONIG_ENCODING_ISO_8859_14
},
#endif
#ifdef ONIG_ENCODING_ISO_8859_15
{
"ISO-8859-15\0ISO8859-15\0ISO_8859_15\0ISO8859_15\0",
ONIG_ENCODING_ISO_8859_15
},
#endif
#ifdef ONIG_ENCODING_ISO_8859_16
{
"ISO-8859-16\0ISO8859-16\0ISO_8859_16\0ISO8859_16\0",
ONIG_ENCODING_ISO_8859_16
},
#endif
#ifdef ONIG_ENCODING_ASCII
{
"ASCII\0US-ASCII\0US_ASCII\0ISO646\0",
ONIG_ENCODING_ASCII
},
#endif
{ NULL, ONIG_ENCODING_UNDEF }
};
/* }}} */
/* {{{ php_mb_regex_name2mbctype */
static OnigEncoding _php_mb_regex_name2mbctype(const char *pname)
{
const char *p;
const php_mb_regex_enc_name_map_t *mapping;
if (pname == NULL || !*pname) {
return ONIG_ENCODING_UNDEF;
}
for (mapping = enc_name_map; mapping->names != NULL; mapping++) {
for (p = mapping->names; *p != '\0'; p += (strlen(p) + 1)) {
if (strcasecmp(p, pname) == 0) {
return mapping->code;
}
}
}
return ONIG_ENCODING_UNDEF;
}
/* }}} */
/* {{{ php_mb_regex_mbctype2name */
static const char *_php_mb_regex_mbctype2name(OnigEncoding mbctype)
{
const php_mb_regex_enc_name_map_t *mapping;
for (mapping = enc_name_map; mapping->names != NULL; mapping++) {
if (mapping->code == mbctype) {
return mapping->names;
}
}
return NULL;
}
/* }}} */
/* {{{ php_mb_regex_set_mbctype */
int php_mb_regex_set_mbctype(const char *encname)
{
OnigEncoding mbctype = _php_mb_regex_name2mbctype(encname);
if (mbctype == ONIG_ENCODING_UNDEF) {
return FAILURE;
}
MBREX(current_mbctype) = mbctype;
MBREX(current_mbctype_mbfl_encoding) = mbfl_name2encoding(encname);
return SUCCESS;
}
/* }}} */
/* {{{ php_mb_regex_set_default_mbctype */
int php_mb_regex_set_default_mbctype(const char *encname)
{
OnigEncoding mbctype = _php_mb_regex_name2mbctype(encname);
if (mbctype == ONIG_ENCODING_UNDEF) {
return FAILURE;
}
MBREX(default_mbctype) = mbctype;
return SUCCESS;
}
/* }}} */
/* {{{ php_mb_regex_get_mbctype */
const char *php_mb_regex_get_mbctype(void)
{
return _php_mb_regex_mbctype2name(MBREX(current_mbctype));
}
/* }}} */
/* {{{ php_mb_regex_get_mbctype_encoding */
const mbfl_encoding *php_mb_regex_get_mbctype_encoding(void)
{
return MBREX(current_mbctype_mbfl_encoding);
}
/* }}} */
/* {{{ php_mb_regex_get_default_mbctype */
const char *php_mb_regex_get_default_mbctype(void)
{
return _php_mb_regex_mbctype2name(MBREX(default_mbctype));
}
/* }}} */
/*
* regex cache
*/
/* {{{ php_mbregex_compile_pattern */
static php_mb_regex_t *php_mbregex_compile_pattern(const char *pattern, size_t patlen, OnigOptionType options, OnigSyntaxType *syntax)
{
int err_code = 0;
php_mb_regex_t *retval = NULL, *rc = NULL;
OnigErrorInfo err_info;
OnigUChar err_str[ONIG_MAX_ERROR_MESSAGE_LEN];
OnigEncoding enc = MBREX(current_mbctype);
if (!php_mb_check_encoding(pattern, patlen, php_mb_regex_get_mbctype_encoding())) {
php_error_docref(NULL, E_WARNING,
"Pattern is not valid under %s encoding", _php_mb_regex_mbctype2name(enc));
return NULL;
}
rc = zend_hash_str_find_ptr(&MBREX(ht_rc), (char *)pattern, patlen);
if (!rc || onig_get_options(rc) != options || onig_get_encoding(rc) != enc || onig_get_syntax(rc) != syntax) {
if ((err_code = onig_new(&retval, (OnigUChar *)pattern, (OnigUChar *)(pattern + patlen), options, enc, syntax, &err_info)) != ONIG_NORMAL) {
onig_error_code_to_str(err_str, err_code, &err_info);
php_error_docref(NULL, E_WARNING, "mbregex compile err: %s", err_str);
return NULL;
}
if (rc == MBREX(search_re)) {
/* reuse the new rc? see bug #72399 */
MBREX(search_re) = NULL;
}
zend_hash_str_update_ptr(&MBREX(ht_rc), (char *)pattern, patlen, retval);
} else {
retval = rc;
}
return retval;
}
/* }}} */
/* {{{ _php_mb_regex_get_option_string */
static size_t _php_mb_regex_get_option_string(char *str, size_t len, OnigOptionType option, OnigSyntaxType *syntax)
{
size_t len_left = len;
size_t len_req = 0;
char *p = str;
char c;
if ((option & ONIG_OPTION_IGNORECASE) != 0) {
if (len_left > 0) {
--len_left;
*(p++) = 'i';
}
++len_req;
}
if ((option & ONIG_OPTION_EXTEND) != 0) {
if (len_left > 0) {
--len_left;
*(p++) = 'x';
}
++len_req;
}
if ((option & (ONIG_OPTION_MULTILINE | ONIG_OPTION_SINGLELINE)) ==
(ONIG_OPTION_MULTILINE | ONIG_OPTION_SINGLELINE)) {
if (len_left > 0) {
--len_left;
*(p++) = 'p';
}
++len_req;
} else {
if ((option & ONIG_OPTION_MULTILINE) != 0) {
if (len_left > 0) {
--len_left;
*(p++) = 'm';
}
++len_req;
}
if ((option & ONIG_OPTION_SINGLELINE) != 0) {
if (len_left > 0) {
--len_left;
*(p++) = 's';
}
++len_req;
}
}
if ((option & ONIG_OPTION_FIND_LONGEST) != 0) {
if (len_left > 0) {
--len_left;
*(p++) = 'l';
}
++len_req;
}
if ((option & ONIG_OPTION_FIND_NOT_EMPTY) != 0) {
if (len_left > 0) {
--len_left;
*(p++) = 'n';
}
++len_req;
}
c = 0;
if (syntax == ONIG_SYNTAX_JAVA) {
c = 'j';
} else if (syntax == ONIG_SYNTAX_GNU_REGEX) {
c = 'u';
} else if (syntax == ONIG_SYNTAX_GREP) {
c = 'g';
} else if (syntax == ONIG_SYNTAX_EMACS) {
c = 'c';
} else if (syntax == ONIG_SYNTAX_RUBY) {
c = 'r';
} else if (syntax == ONIG_SYNTAX_PERL) {
c = 'z';
} else if (syntax == ONIG_SYNTAX_POSIX_BASIC) {
c = 'b';
} else if (syntax == ONIG_SYNTAX_POSIX_EXTENDED) {
c = 'd';
}
if (c != 0) {
if (len_left > 0) {
--len_left;
*(p++) = c;
}
++len_req;
}
if (len_left > 0) {
--len_left;
*(p++) = '\0';
}
++len_req;
if (len < len_req) {
return len_req;
}
return 0;
}
/* }}} */
/* {{{ _php_mb_regex_init_options */
static void
_php_mb_regex_init_options(const char *parg, size_t narg, OnigOptionType *option, OnigSyntaxType **syntax, int *eval)
{
size_t n;
char c;
OnigOptionType optm = 0;
*syntax = ONIG_SYNTAX_RUBY;
if (parg != NULL) {
n = 0;
while(n < narg) {
c = parg[n++];
switch (c) {
case 'i':
optm |= ONIG_OPTION_IGNORECASE;
break;
case 'x':
optm |= ONIG_OPTION_EXTEND;
break;
case 'm':
optm |= ONIG_OPTION_MULTILINE;
break;
case 's':
optm |= ONIG_OPTION_SINGLELINE;
break;
case 'p':
optm |= ONIG_OPTION_MULTILINE | ONIG_OPTION_SINGLELINE;
break;
case 'l':
optm |= ONIG_OPTION_FIND_LONGEST;
break;
case 'n':
optm |= ONIG_OPTION_FIND_NOT_EMPTY;
break;
case 'j':
*syntax = ONIG_SYNTAX_JAVA;
break;
case 'u':
*syntax = ONIG_SYNTAX_GNU_REGEX;
break;
case 'g':
*syntax = ONIG_SYNTAX_GREP;
break;
case 'c':
*syntax = ONIG_SYNTAX_EMACS;
break;
case 'r':
*syntax = ONIG_SYNTAX_RUBY;
break;
case 'z':
*syntax = ONIG_SYNTAX_PERL;
break;
case 'b':
*syntax = ONIG_SYNTAX_POSIX_BASIC;
break;
case 'd':
*syntax = ONIG_SYNTAX_POSIX_EXTENDED;
break;
case 'e':
if (eval != NULL) *eval = 1;
break;
default:
break;
}
}
if (option != NULL) *option|=optm;
}
}
/* }}} */
/*
* Callbacks for named subpatterns
*/
/* {{{ struct mb_ereg_groups_iter_arg */
typedef struct mb_regex_groups_iter_args {
zval *groups;
char *search_str;
size_t search_len;
OnigRegion *region;
} mb_regex_groups_iter_args;
/* }}} */
/* {{{ mb_ereg_groups_iter */
static int
mb_regex_groups_iter(const OnigUChar* name, const OnigUChar* name_end, int ngroup_num, int* group_nums, regex_t* reg, void* parg)
{
mb_regex_groups_iter_args *args = (mb_regex_groups_iter_args *) parg;
int gn, beg, end;
/*
* In case of duplicate groups, keep only the last succeeding one
* to be consistent with preg_match with the PCRE_DUPNAMES option.
*/
gn = onig_name_to_backref_number(reg, name, name_end, args->region);
beg = args->region->beg[gn];
end = args->region->end[gn];
if (beg >= 0 && beg < end && end <= args->search_len) {
add_assoc_stringl_ex(args->groups, (char *)name, name_end - name, &args->search_str[beg], end - beg);
} else {
add_assoc_bool_ex(args->groups, (char *)name, name_end - name, 0);
}
return 0;
}
/* }}} */
/*
* Helper for _php_mb_regex_ereg_replace_exec
*/
/* {{{ mb_regex_substitute */
static inline void mb_regex_substitute(
smart_str *pbuf,
const char *subject,
size_t subject_len,
char *replace,
size_t replace_len,
php_mb_regex_t *regexp,
OnigRegion *regs,
const mbfl_encoding *enc
) {
char *p, *sp, *eos;
int no; /* bakreference group number */
int clen; /* byte-length of the current character */
p = replace;
eos = replace + replace_len;
while (p < eos) {
clen = (int) php_mb_mbchar_bytes_ex(p, enc);
if (clen != 1 || p == eos || p[0] != '\\') {
/* skip anything that's not an ascii backslash */
smart_str_appendl(pbuf, p, clen);
p += clen;
continue;
}
sp = p; /* save position */
clen = (int) php_mb_mbchar_bytes_ex(++p, enc);
if (clen != 1 || p == eos) {
/* skip backslash followed by multibyte char */
smart_str_appendl(pbuf, sp, p - sp);
continue;
}
no = -1;
switch (p[0]) {
case '0':
no = 0;
p++;
break;
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
if (!onig_noname_group_capture_is_active(regexp)) {
/*
* FIXME:
* Oniguruma throws a compile error if numbered backrefs are used with named groups in the pattern.
* For now we just ignore them, but in the future we might want to raise a warning
* and abort the whole replace operation.
*/
p++;
smart_str_appendl(pbuf, sp, p - sp);
continue;
}
no = p[0] - '0';
p++;
break;
case 'k':
{
clen = (int) php_mb_mbchar_bytes_ex(++p, enc);
if (clen != 1 || p == eos || (p[0] != '<' && p[0] != '\'')) {
/* not a backref delimiter */
p += clen;
smart_str_appendl(pbuf, sp, p - sp);
continue;
}
/* try to consume everything until next delimiter */
char delim = p[0] == '<' ? '>' : '\'';
char *name, *name_end;
char maybe_num = 1;
name_end = name = p + 1;
while (name_end < eos) {
clen = (int) php_mb_mbchar_bytes_ex(name_end, enc);
if (clen != 1) {
name_end += clen;
maybe_num = 0;
continue;
}
if (name_end[0] == delim) break;
if (maybe_num && !isdigit(name_end[0])) maybe_num = 0;
name_end++;
}
p = name_end + 1;
if (name_end - name < 1 || name_end >= eos) {
/* the backref was empty or we failed to find the end delimiter */
smart_str_appendl(pbuf, sp, p - sp);
continue;
}
/* we have either a name or a number */
if (maybe_num) {
if (!onig_noname_group_capture_is_active(regexp)) {
/* see above note on mixing numbered & named backrefs */
smart_str_appendl(pbuf, sp, p - sp);
continue;
}
if (name_end - name == 1) {
no = name[0] - '0';
break;
}
if (name[0] == '0') {
/* 01 is not a valid number */
break;
}
no = (int) strtoul(name, NULL, 10);
break;
}
no = onig_name_to_backref_number(regexp, (OnigUChar *)name, (OnigUChar *)name_end, regs);
break;
}
default:
/* We're not treating \ as an escape character and will interpret something like
* \\1 as \ followed by \1, rather than \\ followed by 1. This is because this
* function has not supported escaping of backslashes historically. */
smart_str_appendl(pbuf, sp, p - sp);
continue;
}
if (no < 0 || no >= regs->num_regs) {
/* invalid group number reference, keep the escape sequence in the output */
smart_str_appendl(pbuf, sp, p - sp);
continue;
}
if (regs->beg[no] >= 0 && regs->beg[no] < regs->end[no] && (size_t)regs->end[no] <= subject_len) {
smart_str_appendl(pbuf, subject + regs->beg[no], regs->end[no] - regs->beg[no]);
}
}
if (p < eos) {
smart_str_appendl(pbuf, p, eos - p);
}
}
/* }}} */
/*
* php functions
*/
/* {{{ proto string mb_regex_encoding([string encoding])
Returns the current encoding for regex as a string. */
PHP_FUNCTION(mb_regex_encoding)
{
char *encoding = NULL;
size_t encoding_len;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "|s", &encoding, &encoding_len) == FAILURE) {
RETURN_THROWS();
}
if (!encoding) {
const char *retval = php_mb_regex_get_mbctype();
ZEND_ASSERT(retval != NULL);
RETURN_STRING(retval);
} else {
if (php_mb_regex_set_mbctype(encoding) == FAILURE) {
zend_argument_value_error(1, "must be a valid encoding, \"%s\" given", encoding);
RETURN_THROWS();
}
/* TODO Make function return previous encoding? */
RETURN_TRUE;
}
}
/* }}} */
/* {{{ _php_mb_onig_search */
static int _php_mb_onig_search(regex_t* reg, const OnigUChar* str, const OnigUChar* end, const OnigUChar* start,
const OnigUChar* range, OnigRegion* region, OnigOptionType option) {
OnigMatchParam *mp = onig_new_match_param();
int err;
onig_initialize_match_param(mp);
if (!ZEND_LONG_UINT_OVFL(MBSTRG(regex_stack_limit))) {
onig_set_match_stack_limit_size_of_match_param(mp, (unsigned int)MBSTRG(regex_stack_limit));
}
if (!ZEND_LONG_UINT_OVFL(MBSTRG(regex_retry_limit))) {
onig_set_retry_limit_in_match_of_match_param(mp, (unsigned int)MBSTRG(regex_retry_limit));
}
/* search */
err = onig_search_with_param(reg, str, end, start, range, region, option, mp);
onig_free_match_param(mp);
return err;
}
/* }}} */
/* {{{ _php_mb_regex_ereg_exec */
static void _php_mb_regex_ereg_exec(INTERNAL_FUNCTION_PARAMETERS, int icase)
{
zval *array = NULL;
char *arg_pattern, *string;
size_t arg_pattern_len, string_len;
php_mb_regex_t *re;
OnigRegion *regs = NULL;
int i, match_len, beg, end;
OnigOptionType options;
char *str;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "ss|z", &arg_pattern, &arg_pattern_len, &string, &string_len, &array) == FAILURE) {
RETURN_THROWS();
}
if (array != NULL) {
array = zend_try_array_init(array);
if (!array) {
RETURN_THROWS();
}
}
if (!php_mb_check_encoding(
string,
string_len,
php_mb_regex_get_mbctype_encoding()
)) {
RETURN_FALSE;
}
options = MBREX(regex_default_options);
if (icase) {
options |= ONIG_OPTION_IGNORECASE;
}
if (arg_pattern_len == 0) {
php_error_docref(NULL, E_WARNING, "Empty pattern");
RETVAL_FALSE;
goto out;
}
re = php_mbregex_compile_pattern(arg_pattern, arg_pattern_len, options, MBREX(regex_default_syntax));
if (re == NULL) {
RETVAL_FALSE;
goto out;
}
regs = onig_region_new();
/* actually execute the regular expression */
if (_php_mb_onig_search(re, (OnigUChar *)string, (OnigUChar *)(string + string_len), (OnigUChar *)string, (OnigUChar *)(string + string_len), regs, 0) < 0) {
RETVAL_FALSE;
goto out;
}
match_len = 1;
str = string;
if (array != NULL) {
match_len = regs->end[0] - regs->beg[0];
for (i = 0; i < regs->num_regs; i++) {
beg = regs->beg[i];
end = regs->end[i];
if (beg >= 0 && beg < end && (size_t)end <= string_len) {
add_index_stringl(array, i, (char *)&str[beg], end - beg);
} else {
add_index_bool(array, i, 0);
}
}
if (onig_number_of_names(re) > 0) {
mb_regex_groups_iter_args args = {array, string, string_len, regs};
onig_foreach_name(re, mb_regex_groups_iter, &args);
}
}
if (match_len == 0) {
match_len = 1;
}
RETVAL_LONG(match_len);
out:
if (regs != NULL) {
onig_region_free(regs, 1);
}
}
/* }}} */
/* {{{ proto int mb_ereg(string pattern, string string [, array registers])
Regular expression match for multibyte string */
PHP_FUNCTION(mb_ereg)
{
_php_mb_regex_ereg_exec(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0);
}
/* }}} */
/* {{{ proto int mb_eregi(string pattern, string string [, array registers])
Case-insensitive regular expression match for multibyte string */
PHP_FUNCTION(mb_eregi)
{
_php_mb_regex_ereg_exec(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1);
}
/* }}} */