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string.c
6041 lines (5340 loc) · 143 KB
/
string.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. |
+----------------------------------------------------------------------+
| Authors: Rasmus Lerdorf <rasmus@php.net> |
| Stig Sæther Bakken <ssb@php.net> |
| Zeev Suraski <zeev@php.net> |
+----------------------------------------------------------------------+
*/
#include <stdio.h>
#include "php.h"
#include "php_rand.h"
#include "php_string.h"
#include "php_variables.h"
#include <locale.h>
#ifdef HAVE_LANGINFO_H
# include <langinfo.h>
#endif
/*
* This define is here because some versions of libintl redefine setlocale
* to point to libintl_setlocale. That's a ridiculous thing to do as far
* as I am concerned, but with this define and the subsequent undef we
* limit the damage to just the actual setlocale() call in this file
* without turning zif_setlocale into zif_libintl_setlocale. -Rasmus
*/
#define php_my_setlocale setlocale
#ifdef HAVE_LIBINTL
# include <libintl.h> /* For LC_MESSAGES */
#ifdef setlocale
# undef setlocale
#endif
#endif
#include "scanf.h"
#include "zend_API.h"
#include "zend_execute.h"
#include "php_globals.h"
#include "basic_functions.h"
#include "zend_smart_str.h"
#include <Zend/zend_exceptions.h>
#ifdef ZTS
#include "TSRM.h"
#endif
/* For str_getcsv() support */
#include "ext/standard/file.h"
/* For php_next_utf8_char() */
#include "ext/standard/html.h"
#define STR_PAD_LEFT 0
#define STR_PAD_RIGHT 1
#define STR_PAD_BOTH 2
#define PHP_PATHINFO_DIRNAME 1
#define PHP_PATHINFO_BASENAME 2
#define PHP_PATHINFO_EXTENSION 4
#define PHP_PATHINFO_FILENAME 8
#define PHP_PATHINFO_ALL (PHP_PATHINFO_DIRNAME | PHP_PATHINFO_BASENAME | PHP_PATHINFO_EXTENSION | PHP_PATHINFO_FILENAME)
#define STR_STRSPN 0
#define STR_STRCSPN 1
/* {{{ register_string_constants */
void register_string_constants(INIT_FUNC_ARGS)
{
REGISTER_LONG_CONSTANT("STR_PAD_LEFT", STR_PAD_LEFT, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STR_PAD_RIGHT", STR_PAD_RIGHT, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STR_PAD_BOTH", STR_PAD_BOTH, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("PATHINFO_DIRNAME", PHP_PATHINFO_DIRNAME, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("PATHINFO_BASENAME", PHP_PATHINFO_BASENAME, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("PATHINFO_EXTENSION", PHP_PATHINFO_EXTENSION, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("PATHINFO_FILENAME", PHP_PATHINFO_FILENAME, CONST_CS | CONST_PERSISTENT);
/* If last members of struct lconv equal CHAR_MAX, no grouping is done */
REGISTER_LONG_CONSTANT("CHAR_MAX", CHAR_MAX, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("LC_CTYPE", LC_CTYPE, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("LC_NUMERIC", LC_NUMERIC, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("LC_TIME", LC_TIME, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("LC_COLLATE", LC_COLLATE, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("LC_MONETARY", LC_MONETARY, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("LC_ALL", LC_ALL, CONST_CS | CONST_PERSISTENT);
# ifdef LC_MESSAGES
REGISTER_LONG_CONSTANT("LC_MESSAGES", LC_MESSAGES, CONST_CS | CONST_PERSISTENT);
# endif
}
/* }}} */
int php_tag_find(char *tag, size_t len, const char *set);
/* this is read-only, so it's ok */
ZEND_SET_ALIGNED(16, static char hexconvtab[]) = "0123456789abcdef";
/* localeconv mutex */
#ifdef ZTS
static MUTEX_T locale_mutex = NULL;
#endif
/* {{{ php_bin2hex */
static zend_string *php_bin2hex(const unsigned char *old, const size_t oldlen)
{
zend_string *result;
size_t i, j;
result = zend_string_safe_alloc(oldlen, 2 * sizeof(char), 0, 0);
for (i = j = 0; i < oldlen; i++) {
ZSTR_VAL(result)[j++] = hexconvtab[old[i] >> 4];
ZSTR_VAL(result)[j++] = hexconvtab[old[i] & 15];
}
ZSTR_VAL(result)[j] = '\0';
return result;
}
/* }}} */
/* {{{ php_hex2bin */
static zend_string *php_hex2bin(const unsigned char *old, const size_t oldlen)
{
size_t target_length = oldlen >> 1;
zend_string *str = zend_string_alloc(target_length, 0);
unsigned char *ret = (unsigned char *)ZSTR_VAL(str);
size_t i, j;
for (i = j = 0; i < target_length; i++) {
unsigned char c = old[j++];
unsigned char l = c & ~0x20;
int is_letter = ((unsigned int) ((l - 'A') ^ (l - 'F' - 1))) >> (8 * sizeof(unsigned int) - 1);
unsigned char d;
/* basically (c >= '0' && c <= '9') || (l >= 'A' && l <= 'F') */
if (EXPECTED((((c ^ '0') - 10) >> (8 * sizeof(unsigned int) - 1)) | is_letter)) {
d = (l - 0x10 - 0x27 * is_letter) << 4;
} else {
zend_string_efree(str);
return NULL;
}
c = old[j++];
l = c & ~0x20;
is_letter = ((unsigned int) ((l - 'A') ^ (l - 'F' - 1))) >> (8 * sizeof(unsigned int) - 1);
if (EXPECTED((((c ^ '0') - 10) >> (8 * sizeof(unsigned int) - 1)) | is_letter)) {
d |= l - 0x10 - 0x27 * is_letter;
} else {
zend_string_efree(str);
return NULL;
}
ret[i] = d;
}
ret[i] = '\0';
return str;
}
/* }}} */
/* {{{ localeconv_r
* glibc's localeconv is not reentrant, so lets make it so ... sorta */
PHPAPI struct lconv *localeconv_r(struct lconv *out)
{
#ifdef ZTS
tsrm_mutex_lock( locale_mutex );
#endif
/* cur->locinfo is struct __crt_locale_info which implementation is
hidden in vc14. TODO revisit this and check if a workaround available
and needed. */
#if defined(PHP_WIN32) && _MSC_VER < 1900 && defined(ZTS)
{
/* Even with the enabled per thread locale, localeconv
won't check any locale change in the master thread. */
_locale_t cur = _get_current_locale();
*out = *cur->locinfo->lconv;
_free_locale(cur);
}
#else
/* localeconv doesn't return an error condition */
*out = *localeconv();
#endif
#ifdef ZTS
tsrm_mutex_unlock( locale_mutex );
#endif
return out;
}
/* }}} */
#ifdef ZTS
/* {{{ PHP_MINIT_FUNCTION */
PHP_MINIT_FUNCTION(localeconv)
{
locale_mutex = tsrm_mutex_alloc();
return SUCCESS;
}
/* }}} */
/* {{{ PHP_MSHUTDOWN_FUNCTION */
PHP_MSHUTDOWN_FUNCTION(localeconv)
{
tsrm_mutex_free( locale_mutex );
locale_mutex = NULL;
return SUCCESS;
}
/* }}} */
#endif
/* {{{ Converts the binary representation of data to hex */
PHP_FUNCTION(bin2hex)
{
zend_string *result;
zend_string *data;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_STR(data)
ZEND_PARSE_PARAMETERS_END();
result = php_bin2hex((unsigned char *)ZSTR_VAL(data), ZSTR_LEN(data));
RETURN_STR(result);
}
/* }}} */
/* {{{ Converts the hex representation of data to binary */
PHP_FUNCTION(hex2bin)
{
zend_string *result, *data;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_STR(data)
ZEND_PARSE_PARAMETERS_END();
if (ZSTR_LEN(data) % 2 != 0) {
php_error_docref(NULL, E_WARNING, "Hexadecimal input string must have an even length");
RETURN_FALSE;
}
result = php_hex2bin((unsigned char *)ZSTR_VAL(data), ZSTR_LEN(data));
if (!result) {
php_error_docref(NULL, E_WARNING, "Input string must be hexadecimal string");
RETURN_FALSE;
}
RETVAL_STR(result);
}
/* }}} */
static void php_spn_common_handler(INTERNAL_FUNCTION_PARAMETERS, int behavior) /* {{{ */
{
zend_string *s11, *s22;
zend_long start = 0, len = 0;
ZEND_PARSE_PARAMETERS_START(2, 4)
Z_PARAM_STR(s11)
Z_PARAM_STR(s22)
Z_PARAM_OPTIONAL
Z_PARAM_LONG(start)
Z_PARAM_LONG(len)
ZEND_PARSE_PARAMETERS_END();
if (ZEND_NUM_ARGS() < 4) {
len = ZSTR_LEN(s11);
}
/* look at substr() function for more information */
if (start < 0) {
start += (zend_long)ZSTR_LEN(s11);
if (start < 0) {
start = 0;
}
} else if ((size_t)start > ZSTR_LEN(s11)) {
RETURN_FALSE;
}
if (len < 0) {
len += (ZSTR_LEN(s11) - start);
if (len < 0) {
len = 0;
}
}
if (len > (zend_long)ZSTR_LEN(s11) - start) {
len = ZSTR_LEN(s11) - start;
}
if(len == 0) {
RETURN_LONG(0);
}
if (behavior == STR_STRSPN) {
RETURN_LONG(php_strspn(ZSTR_VAL(s11) + start /*str1_start*/,
ZSTR_VAL(s22) /*str2_start*/,
ZSTR_VAL(s11) + start + len /*str1_end*/,
ZSTR_VAL(s22) + ZSTR_LEN(s22) /*str2_end*/));
} else if (behavior == STR_STRCSPN) {
RETURN_LONG(php_strcspn(ZSTR_VAL(s11) + start /*str1_start*/,
ZSTR_VAL(s22) /*str2_start*/,
ZSTR_VAL(s11) + start + len /*str1_end*/,
ZSTR_VAL(s22) + ZSTR_LEN(s22) /*str2_end*/));
}
}
/* }}} */
/* {{{ Finds length of initial segment consisting entirely of characters found in mask. If start or/and length is provided works like strspn(substr($s,$start,$len),$good_chars) */
PHP_FUNCTION(strspn)
{
php_spn_common_handler(INTERNAL_FUNCTION_PARAM_PASSTHRU, STR_STRSPN);
}
/* }}} */
/* {{{ Finds length of initial segment consisting entirely of characters not found in mask. If start or/and length is provide works like strcspn(substr($s,$start,$len),$bad_chars) */
PHP_FUNCTION(strcspn)
{
php_spn_common_handler(INTERNAL_FUNCTION_PARAM_PASSTHRU, STR_STRCSPN);
}
/* }}} */
/* {{{ PHP_MINIT_FUNCTION(nl_langinfo) */
#if HAVE_NL_LANGINFO
PHP_MINIT_FUNCTION(nl_langinfo)
{
#define REGISTER_NL_LANGINFO_CONSTANT(x) REGISTER_LONG_CONSTANT(#x, x, CONST_CS | CONST_PERSISTENT)
#ifdef ABDAY_1
REGISTER_NL_LANGINFO_CONSTANT(ABDAY_1);
REGISTER_NL_LANGINFO_CONSTANT(ABDAY_2);
REGISTER_NL_LANGINFO_CONSTANT(ABDAY_3);
REGISTER_NL_LANGINFO_CONSTANT(ABDAY_4);
REGISTER_NL_LANGINFO_CONSTANT(ABDAY_5);
REGISTER_NL_LANGINFO_CONSTANT(ABDAY_6);
REGISTER_NL_LANGINFO_CONSTANT(ABDAY_7);
#endif
#ifdef DAY_1
REGISTER_NL_LANGINFO_CONSTANT(DAY_1);
REGISTER_NL_LANGINFO_CONSTANT(DAY_2);
REGISTER_NL_LANGINFO_CONSTANT(DAY_3);
REGISTER_NL_LANGINFO_CONSTANT(DAY_4);
REGISTER_NL_LANGINFO_CONSTANT(DAY_5);
REGISTER_NL_LANGINFO_CONSTANT(DAY_6);
REGISTER_NL_LANGINFO_CONSTANT(DAY_7);
#endif
#ifdef ABMON_1
REGISTER_NL_LANGINFO_CONSTANT(ABMON_1);
REGISTER_NL_LANGINFO_CONSTANT(ABMON_2);
REGISTER_NL_LANGINFO_CONSTANT(ABMON_3);
REGISTER_NL_LANGINFO_CONSTANT(ABMON_4);
REGISTER_NL_LANGINFO_CONSTANT(ABMON_5);
REGISTER_NL_LANGINFO_CONSTANT(ABMON_6);
REGISTER_NL_LANGINFO_CONSTANT(ABMON_7);
REGISTER_NL_LANGINFO_CONSTANT(ABMON_8);
REGISTER_NL_LANGINFO_CONSTANT(ABMON_9);
REGISTER_NL_LANGINFO_CONSTANT(ABMON_10);
REGISTER_NL_LANGINFO_CONSTANT(ABMON_11);
REGISTER_NL_LANGINFO_CONSTANT(ABMON_12);
#endif
#ifdef MON_1
REGISTER_NL_LANGINFO_CONSTANT(MON_1);
REGISTER_NL_LANGINFO_CONSTANT(MON_2);
REGISTER_NL_LANGINFO_CONSTANT(MON_3);
REGISTER_NL_LANGINFO_CONSTANT(MON_4);
REGISTER_NL_LANGINFO_CONSTANT(MON_5);
REGISTER_NL_LANGINFO_CONSTANT(MON_6);
REGISTER_NL_LANGINFO_CONSTANT(MON_7);
REGISTER_NL_LANGINFO_CONSTANT(MON_8);
REGISTER_NL_LANGINFO_CONSTANT(MON_9);
REGISTER_NL_LANGINFO_CONSTANT(MON_10);
REGISTER_NL_LANGINFO_CONSTANT(MON_11);
REGISTER_NL_LANGINFO_CONSTANT(MON_12);
#endif
#ifdef AM_STR
REGISTER_NL_LANGINFO_CONSTANT(AM_STR);
#endif
#ifdef PM_STR
REGISTER_NL_LANGINFO_CONSTANT(PM_STR);
#endif
#ifdef D_T_FMT
REGISTER_NL_LANGINFO_CONSTANT(D_T_FMT);
#endif
#ifdef D_FMT
REGISTER_NL_LANGINFO_CONSTANT(D_FMT);
#endif
#ifdef T_FMT
REGISTER_NL_LANGINFO_CONSTANT(T_FMT);
#endif
#ifdef T_FMT_AMPM
REGISTER_NL_LANGINFO_CONSTANT(T_FMT_AMPM);
#endif
#ifdef ERA
REGISTER_NL_LANGINFO_CONSTANT(ERA);
#endif
#ifdef ERA_YEAR
REGISTER_NL_LANGINFO_CONSTANT(ERA_YEAR);
#endif
#ifdef ERA_D_T_FMT
REGISTER_NL_LANGINFO_CONSTANT(ERA_D_T_FMT);
#endif
#ifdef ERA_D_FMT
REGISTER_NL_LANGINFO_CONSTANT(ERA_D_FMT);
#endif
#ifdef ERA_T_FMT
REGISTER_NL_LANGINFO_CONSTANT(ERA_T_FMT);
#endif
#ifdef ALT_DIGITS
REGISTER_NL_LANGINFO_CONSTANT(ALT_DIGITS);
#endif
#ifdef INT_CURR_SYMBOL
REGISTER_NL_LANGINFO_CONSTANT(INT_CURR_SYMBOL);
#endif
#ifdef CURRENCY_SYMBOL
REGISTER_NL_LANGINFO_CONSTANT(CURRENCY_SYMBOL);
#endif
#ifdef CRNCYSTR
REGISTER_NL_LANGINFO_CONSTANT(CRNCYSTR);
#endif
#ifdef MON_DECIMAL_POINT
REGISTER_NL_LANGINFO_CONSTANT(MON_DECIMAL_POINT);
#endif
#ifdef MON_THOUSANDS_SEP
REGISTER_NL_LANGINFO_CONSTANT(MON_THOUSANDS_SEP);
#endif
#ifdef MON_GROUPING
REGISTER_NL_LANGINFO_CONSTANT(MON_GROUPING);
#endif
#ifdef POSITIVE_SIGN
REGISTER_NL_LANGINFO_CONSTANT(POSITIVE_SIGN);
#endif
#ifdef NEGATIVE_SIGN
REGISTER_NL_LANGINFO_CONSTANT(NEGATIVE_SIGN);
#endif
#ifdef INT_FRAC_DIGITS
REGISTER_NL_LANGINFO_CONSTANT(INT_FRAC_DIGITS);
#endif
#ifdef FRAC_DIGITS
REGISTER_NL_LANGINFO_CONSTANT(FRAC_DIGITS);
#endif
#ifdef P_CS_PRECEDES
REGISTER_NL_LANGINFO_CONSTANT(P_CS_PRECEDES);
#endif
#ifdef P_SEP_BY_SPACE
REGISTER_NL_LANGINFO_CONSTANT(P_SEP_BY_SPACE);
#endif
#ifdef N_CS_PRECEDES
REGISTER_NL_LANGINFO_CONSTANT(N_CS_PRECEDES);
#endif
#ifdef N_SEP_BY_SPACE
REGISTER_NL_LANGINFO_CONSTANT(N_SEP_BY_SPACE);
#endif
#ifdef P_SIGN_POSN
REGISTER_NL_LANGINFO_CONSTANT(P_SIGN_POSN);
#endif
#ifdef N_SIGN_POSN
REGISTER_NL_LANGINFO_CONSTANT(N_SIGN_POSN);
#endif
#ifdef DECIMAL_POINT
REGISTER_NL_LANGINFO_CONSTANT(DECIMAL_POINT);
#endif
#ifdef RADIXCHAR
REGISTER_NL_LANGINFO_CONSTANT(RADIXCHAR);
#endif
#ifdef THOUSANDS_SEP
REGISTER_NL_LANGINFO_CONSTANT(THOUSANDS_SEP);
#endif
#ifdef THOUSEP
REGISTER_NL_LANGINFO_CONSTANT(THOUSEP);
#endif
#ifdef GROUPING
REGISTER_NL_LANGINFO_CONSTANT(GROUPING);
#endif
#ifdef YESEXPR
REGISTER_NL_LANGINFO_CONSTANT(YESEXPR);
#endif
#ifdef NOEXPR
REGISTER_NL_LANGINFO_CONSTANT(NOEXPR);
#endif
#ifdef YESSTR
REGISTER_NL_LANGINFO_CONSTANT(YESSTR);
#endif
#ifdef NOSTR
REGISTER_NL_LANGINFO_CONSTANT(NOSTR);
#endif
#ifdef CODESET
REGISTER_NL_LANGINFO_CONSTANT(CODESET);
#endif
#undef REGISTER_NL_LANGINFO_CONSTANT
return SUCCESS;
}
/* }}} */
/* {{{ Query language and locale information */
PHP_FUNCTION(nl_langinfo)
{
zend_long item;
char *value;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_LONG(item)
ZEND_PARSE_PARAMETERS_END();
switch(item) { /* {{{ */
#ifdef ABDAY_1
case ABDAY_1:
case ABDAY_2:
case ABDAY_3:
case ABDAY_4:
case ABDAY_5:
case ABDAY_6:
case ABDAY_7:
#endif
#ifdef DAY_1
case DAY_1:
case DAY_2:
case DAY_3:
case DAY_4:
case DAY_5:
case DAY_6:
case DAY_7:
#endif
#ifdef ABMON_1
case ABMON_1:
case ABMON_2:
case ABMON_3:
case ABMON_4:
case ABMON_5:
case ABMON_6:
case ABMON_7:
case ABMON_8:
case ABMON_9:
case ABMON_10:
case ABMON_11:
case ABMON_12:
#endif
#ifdef MON_1
case MON_1:
case MON_2:
case MON_3:
case MON_4:
case MON_5:
case MON_6:
case MON_7:
case MON_8:
case MON_9:
case MON_10:
case MON_11:
case MON_12:
#endif
#ifdef AM_STR
case AM_STR:
#endif
#ifdef PM_STR
case PM_STR:
#endif
#ifdef D_T_FMT
case D_T_FMT:
#endif
#ifdef D_FMT
case D_FMT:
#endif
#ifdef T_FMT
case T_FMT:
#endif
#ifdef T_FMT_AMPM
case T_FMT_AMPM:
#endif
#ifdef ERA
case ERA:
#endif
#ifdef ERA_YEAR
case ERA_YEAR:
#endif
#ifdef ERA_D_T_FMT
case ERA_D_T_FMT:
#endif
#ifdef ERA_D_FMT
case ERA_D_FMT:
#endif
#ifdef ERA_T_FMT
case ERA_T_FMT:
#endif
#ifdef ALT_DIGITS
case ALT_DIGITS:
#endif
#ifdef INT_CURR_SYMBOL
case INT_CURR_SYMBOL:
#endif
#ifdef CURRENCY_SYMBOL
case CURRENCY_SYMBOL:
#endif
#ifdef CRNCYSTR
case CRNCYSTR:
#endif
#ifdef MON_DECIMAL_POINT
case MON_DECIMAL_POINT:
#endif
#ifdef MON_THOUSANDS_SEP
case MON_THOUSANDS_SEP:
#endif
#ifdef MON_GROUPING
case MON_GROUPING:
#endif
#ifdef POSITIVE_SIGN
case POSITIVE_SIGN:
#endif
#ifdef NEGATIVE_SIGN
case NEGATIVE_SIGN:
#endif
#ifdef INT_FRAC_DIGITS
case INT_FRAC_DIGITS:
#endif
#ifdef FRAC_DIGITS
case FRAC_DIGITS:
#endif
#ifdef P_CS_PRECEDES
case P_CS_PRECEDES:
#endif
#ifdef P_SEP_BY_SPACE
case P_SEP_BY_SPACE:
#endif
#ifdef N_CS_PRECEDES
case N_CS_PRECEDES:
#endif
#ifdef N_SEP_BY_SPACE
case N_SEP_BY_SPACE:
#endif
#ifdef P_SIGN_POSN
case P_SIGN_POSN:
#endif
#ifdef N_SIGN_POSN
case N_SIGN_POSN:
#endif
#ifdef DECIMAL_POINT
case DECIMAL_POINT:
#elif defined(RADIXCHAR)
case RADIXCHAR:
#endif
#ifdef THOUSANDS_SEP
case THOUSANDS_SEP:
#elif defined(THOUSEP)
case THOUSEP:
#endif
#ifdef GROUPING
case GROUPING:
#endif
#ifdef YESEXPR
case YESEXPR:
#endif
#ifdef NOEXPR
case NOEXPR:
#endif
#ifdef YESSTR
case YESSTR:
#endif
#ifdef NOSTR
case NOSTR:
#endif
#ifdef CODESET
case CODESET:
#endif
break;
default:
php_error_docref(NULL, E_WARNING, "Item '" ZEND_LONG_FMT "' is not valid", item);
RETURN_FALSE;
}
/* }}} */
value = nl_langinfo(item);
if (value == NULL) {
RETURN_FALSE;
} else {
RETURN_STRING(value);
}
}
#endif
/* }}} */
/* {{{ Compares two strings using the current locale */
PHP_FUNCTION(strcoll)
{
zend_string *s1, *s2;
ZEND_PARSE_PARAMETERS_START(2, 2)
Z_PARAM_STR(s1)
Z_PARAM_STR(s2)
ZEND_PARSE_PARAMETERS_END();
RETURN_LONG(strcoll((const char *) ZSTR_VAL(s1),
(const char *) ZSTR_VAL(s2)));
}
/* }}} */
/* {{{ php_charmask
* Fills a 256-byte bytemask with input. You can specify a range like 'a..z',
* it needs to be incrementing.
* Returns: FAILURE/SUCCESS whether the input was correct (i.e. no range errors)
*/
static inline int php_charmask(const unsigned char *input, size_t len, char *mask)
{
const unsigned char *end;
unsigned char c;
int result = SUCCESS;
memset(mask, 0, 256);
for (end = input+len; input < end; input++) {
c=*input;
if ((input+3 < end) && input[1] == '.' && input[2] == '.'
&& input[3] >= c) {
memset(mask+c, 1, input[3] - c + 1);
input+=3;
} else if ((input+1 < end) && input[0] == '.' && input[1] == '.') {
/* Error, try to be as helpful as possible:
(a range ending/starting with '.' won't be captured here) */
if (end-len >= input) { /* there was no 'left' char */
php_error_docref(NULL, E_WARNING, "Invalid '..'-range, no character to the left of '..'");
result = FAILURE;
continue;
}
if (input+2 >= end) { /* there is no 'right' char */
php_error_docref(NULL, E_WARNING, "Invalid '..'-range, no character to the right of '..'");
result = FAILURE;
continue;
}
if (input[-1] > input[2]) { /* wrong order */
php_error_docref(NULL, E_WARNING, "Invalid '..'-range, '..'-range needs to be incrementing");
result = FAILURE;
continue;
}
/* FIXME: better error (a..b..c is the only left possibility?) */
php_error_docref(NULL, E_WARNING, "Invalid '..'-range");
result = FAILURE;
continue;
} else {
mask[c]=1;
}
}
return result;
}
/* }}} */
/* {{{ php_trim_int()
* mode 1 : trim left
* mode 2 : trim right
* mode 3 : trim left and right
* what indicates which chars are to be trimmed. NULL->default (' \t\n\r\v\0')
*/
static zend_always_inline zend_string *php_trim_int(zend_string *str, const char *what, size_t what_len, int mode)
{
const char *start = ZSTR_VAL(str);
const char *end = start + ZSTR_LEN(str);
char mask[256];
if (what) {
if (what_len == 1) {
char p = *what;
if (mode & 1) {
while (start != end) {
if (*start == p) {
start++;
} else {
break;
}
}
}
if (mode & 2) {
while (start != end) {
if (*(end-1) == p) {
end--;
} else {
break;
}
}
}
} else {
php_charmask((const unsigned char *) what, what_len, mask);
if (mode & 1) {
while (start != end) {
if (mask[(unsigned char)*start]) {
start++;
} else {
break;
}
}
}
if (mode & 2) {
while (start != end) {
if (mask[(unsigned char)*(end-1)]) {
end--;
} else {
break;
}
}
}
}
} else {
if (mode & 1) {
while (start != end) {
unsigned char c = (unsigned char)*start;
if (c <= ' ' &&
(c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == '\v' || c == '\0')) {
start++;
} else {
break;
}
}
}
if (mode & 2) {
while (start != end) {
unsigned char c = (unsigned char)*(end-1);
if (c <= ' ' &&
(c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == '\v' || c == '\0')) {
end--;
} else {
break;
}
}
}
}
if (ZSTR_LEN(str) == end - start) {
return zend_string_copy(str);
} else if (end - start == 0) {
return ZSTR_EMPTY_ALLOC();
} else {
return zend_string_init(start, end - start, 0);
}
}
/* }}} */
/* {{{ php_trim_int()
* mode 1 : trim left
* mode 2 : trim right
* mode 3 : trim left and right
* what indicates which chars are to be trimmed. NULL->default (' \t\n\r\v\0')
*/
PHPAPI zend_string *php_trim(zend_string *str, const char *what, size_t what_len, int mode)
{
return php_trim_int(str, what, what_len, mode);
}
/* }}} */
/* {{{ php_do_trim
* Base for trim(), rtrim() and ltrim() functions.
*/
static zend_always_inline void php_do_trim(INTERNAL_FUNCTION_PARAMETERS, int mode)
{
zend_string *str;
zend_string *what = NULL;
ZEND_PARSE_PARAMETERS_START(1, 2)
Z_PARAM_STR(str)
Z_PARAM_OPTIONAL
Z_PARAM_STR(what)
ZEND_PARSE_PARAMETERS_END();
ZVAL_STR(return_value, php_trim_int(str, (what ? ZSTR_VAL(what) : NULL), (what ? ZSTR_LEN(what) : 0), mode));
}
/* }}} */
/* {{{ Strips whitespace from the beginning and end of a string */
PHP_FUNCTION(trim)
{
php_do_trim(INTERNAL_FUNCTION_PARAM_PASSTHRU, 3);
}
/* }}} */
/* {{{ Removes trailing whitespace */
PHP_FUNCTION(rtrim)
{
php_do_trim(INTERNAL_FUNCTION_PARAM_PASSTHRU, 2);
}
/* }}} */
/* {{{ Strips whitespace from the beginning of a string */
PHP_FUNCTION(ltrim)
{
php_do_trim(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1);
}
/* }}} */
/* {{{ Wraps buffer to selected number of characters using string break char */
PHP_FUNCTION(wordwrap)
{
zend_string *text;
char *breakchar = "\n";
size_t newtextlen, chk, breakchar_len = 1;
size_t alloced;
zend_long current = 0, laststart = 0, lastspace = 0;
zend_long linelength = 75;
zend_bool docut = 0;
zend_string *newtext;
ZEND_PARSE_PARAMETERS_START(1, 4)
Z_PARAM_STR(text)
Z_PARAM_OPTIONAL
Z_PARAM_LONG(linelength)
Z_PARAM_STRING(breakchar, breakchar_len)
Z_PARAM_BOOL(docut)
ZEND_PARSE_PARAMETERS_END();
if (ZSTR_LEN(text) == 0) {
RETURN_EMPTY_STRING();
}
if (breakchar_len == 0) {
zend_argument_value_error(3, "cannot be empty");
RETURN_THROWS();
}
if (linelength == 0 && docut) {
zend_argument_value_error(4, "cannot be true when argument #2 ($width) is 0");
RETURN_THROWS();
}
/* Special case for a single-character break as it needs no
additional storage space */
if (breakchar_len == 1 && !docut) {
newtext = zend_string_init(ZSTR_VAL(text), ZSTR_LEN(text), 0);
laststart = lastspace = 0;
for (current = 0; current < (zend_long)ZSTR_LEN(text); current++) {
if (ZSTR_VAL(text)[current] == breakchar[0]) {
laststart = lastspace = current + 1;
} else if (ZSTR_VAL(text)[current] == ' ') {
if (current - laststart >= linelength) {
ZSTR_VAL(newtext)[current] = breakchar[0];
laststart = current + 1;
}
lastspace = current;
} else if (current - laststart >= linelength && laststart != lastspace) {
ZSTR_VAL(newtext)[lastspace] = breakchar[0];
laststart = lastspace + 1;
}
}
RETURN_NEW_STR(newtext);
} else {
/* Multiple character line break or forced cut */
if (linelength > 0) {
chk = (size_t)(ZSTR_LEN(text)/linelength + 1);
newtext = zend_string_safe_alloc(chk, breakchar_len, ZSTR_LEN(text), 0);
alloced = ZSTR_LEN(text) + chk * breakchar_len + 1;
} else {
chk = ZSTR_LEN(text);
alloced = ZSTR_LEN(text) * (breakchar_len + 1) + 1;
newtext = zend_string_safe_alloc(ZSTR_LEN(text), breakchar_len + 1, 0, 0);
}
/* now keep track of the actual new text length */
newtextlen = 0;
laststart = lastspace = 0;
for (current = 0; current < (zend_long)ZSTR_LEN(text); current++) {
if (chk == 0) {
alloced += (size_t) (((ZSTR_LEN(text) - current + 1)/linelength + 1) * breakchar_len) + 1;
newtext = zend_string_extend(newtext, alloced, 0);
chk = (size_t) ((ZSTR_LEN(text) - current)/linelength) + 1;
}
/* when we hit an existing break, copy to new buffer, and
* fix up laststart and lastspace */
if (ZSTR_VAL(text)[current] == breakchar[0]
&& current + breakchar_len < ZSTR_LEN(text)
&& !strncmp(ZSTR_VAL(text) + current, breakchar, breakchar_len)) {
memcpy(ZSTR_VAL(newtext) + newtextlen, ZSTR_VAL(text) + laststart, current - laststart + breakchar_len);
newtextlen += current - laststart + breakchar_len;
current += breakchar_len - 1;
laststart = lastspace = current + 1;
chk--;
}
/* if it is a space, check if it is at the line boundary,
* copy and insert a break, or just keep track of it */
else if (ZSTR_VAL(text)[current] == ' ') {
if (current - laststart >= linelength) {
memcpy(ZSTR_VAL(newtext) + newtextlen, ZSTR_VAL(text) + laststart, current - laststart);
newtextlen += current - laststart;
memcpy(ZSTR_VAL(newtext) + newtextlen, breakchar, breakchar_len);
newtextlen += breakchar_len;
laststart = current + 1;
chk--;
}
lastspace = current;
}
/* if we are cutting, and we've accumulated enough
* characters, and we haven't see a space for this line,
* copy and insert a break. */
else if (current - laststart >= linelength
&& docut && laststart >= lastspace) {
memcpy(ZSTR_VAL(newtext) + newtextlen, ZSTR_VAL(text) + laststart, current - laststart);
newtextlen += current - laststart;
memcpy(ZSTR_VAL(newtext) + newtextlen, breakchar, breakchar_len);