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string.c
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string.c
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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2007 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@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
/* Synced with php 3.0 revision 1.193 1999-06-16 [ssb] */
#include <stdio.h>
#include "php.h"
#include "reg.h"
#include "php_rand.h"
#include "php_string.h"
#include "php_variables.h"
#ifdef HAVE_LOCALE_H
# include <locale.h>
#endif
#ifdef HAVE_LANGINFO_H
# include <langinfo.h>
#endif
#ifdef HAVE_MONETARY_H
# include <monetary.h>
#endif
#ifdef HAVE_LIBINTL
# include <libintl.h> /* For LC_MESSAGES */
#endif
#include <math.h>
#include "scanf.h"
#include "zend_API.h"
#include "zend_execute.h"
#include "php_globals.h"
#include "basic_functions.h"
#include "php_smart_str.h"
#ifdef ZTS
#include "TSRM.h"
#endif
#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);
#ifdef HAVE_LOCALECONV
/* If last members of struct lconv equal CHAR_MAX, no grouping is done */
/* This is bad, but since we are going to be hardcoding in the POSIX stuff anyway... */
# ifndef HAVE_LIMITS_H
# define CHAR_MAX 127
# endif
REGISTER_LONG_CONSTANT("CHAR_MAX", CHAR_MAX, CONST_CS | CONST_PERSISTENT);
#endif
#ifdef HAVE_LOCALE_H
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
#endif
}
/* }}} */
int php_tag_find(char *tag, int len, char *set);
/* this is read-only, so it's ok */
static char hexconvtab[] = "0123456789abcdef";
/* localeconv mutex */
#ifdef ZTS
static MUTEX_T locale_mutex = NULL;
#endif
/* {{{ php_bin2hex
*/
static char *php_bin2hex(const unsigned char *old, const size_t oldlen, size_t *newlen)
{
register unsigned char *result = NULL;
size_t i, j;
result = (char *) safe_emalloc(oldlen * 2, sizeof(char), 1);
for (i = j = 0; i < oldlen; i++) {
result[j++] = hexconvtab[old[i] >> 4];
result[j++] = hexconvtab[old[i] & 15];
}
result[j] = '\0';
if (newlen)
*newlen = oldlen * 2 * sizeof(char);
return result;
}
/* }}} */
#ifdef HAVE_LOCALECONV
/* {{{ localeconv_r
* glibc's localeconv is not reentrant, so lets make it so ... sorta */
PHPAPI struct lconv *localeconv_r(struct lconv *out)
{
struct lconv *res;
# ifdef ZTS
tsrm_mutex_lock( locale_mutex );
# endif
/* localeconv doesn't return an error condition */
res = localeconv();
*out = *res;
# 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
#endif
/* {{{ proto string bin2hex(string data)
Converts the binary representation of data to hex */
PHP_FUNCTION(bin2hex)
{
zval **data;
char *result;
size_t newlen;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &data) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(data);
result = php_bin2hex(Z_STRVAL_PP(data), Z_STRLEN_PP(data), &newlen);
if (!result) {
RETURN_FALSE;
}
RETURN_STRINGL(result, newlen, 0);
}
/* }}} */
static void php_spn_common_handler(INTERNAL_FUNCTION_PARAMETERS, int behavior)
{
char *s11, *s22;
int len1, len2;
long start, len;
start = 0;
len = 0;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss|ll", &s11, &len1,
&s22, &len2, &start, &len) == FAILURE) {
return;
}
if (ZEND_NUM_ARGS() < 4) {
len = len1;
}
/* look at substr() function for more information */
if (start < 0) {
start += len1;
if (start < 0) {
start = 0;
}
} else if (start > len1) {
RETURN_FALSE;
}
if (len < 0) {
len += (len1 - start);
if (len < 0) {
len = 0;
}
}
if ((start + len) > len1) {
len = len1 - start;
}
if (behavior == STR_STRSPN) {
RETURN_LONG(php_strspn(s11 + start /*str1_start*/,
s22 /*str2_start*/,
s11 + start + len /*str1_end*/,
s22 + len2 /*str2_end*/));
} else if (behavior == STR_STRCSPN) {
RETURN_LONG(php_strcspn(s11 + start /*str1_start*/,
s22 /*str2_start*/,
s11 + start + len /*str1_end*/,
s22 + len2 /*str2_end*/));
}
}
/* {{{ proto int strspn(string str, string mask [, start [, len]])
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);
}
/* }}} */
/* {{{ proto int strcspn(string str, string mask [, start [, len]])
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;
}
/* }}} */
/* {{{ proto string nl_langinfo(int item)
Query language and locale information */
PHP_FUNCTION(nl_langinfo)
{
zval **item;
char *value;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &item) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(item);
value = nl_langinfo(Z_LVAL_PP(item));
if (value == NULL) {
RETURN_FALSE;
} else {
RETURN_STRING(value, 1);
}
}
#endif
/* }}} */
#ifdef HAVE_STRCOLL
/* {{{ proto int strcoll(string str1, string str2)
Compares two strings using the current locale */
PHP_FUNCTION(strcoll)
{
zval **s1, **s2;
if (ZEND_NUM_ARGS()!=2 || zend_get_parameters_ex(2, &s1, &s2) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(s1);
convert_to_string_ex(s2);
RETURN_LONG(strcoll((const char *) Z_STRVAL_PP(s1),
(const char *) Z_STRVAL_PP(s2)));
}
/* }}} */
#endif
/* {{{ 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(unsigned char *input, int len, char *mask TSRMLS_DC)
{
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 TSRMLS_CC, 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 TSRMLS_CC, E_WARNING, "Invalid '..'-range, no character to the right of '..'.");
result = FAILURE;
continue;
}
if (input[-1] > input[2]) { /* wrong order */
php_error_docref(NULL TSRMLS_CC, 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 TSRMLS_CC, E_WARNING, "Invalid '..'-range.");
result = FAILURE;
continue;
} else {
mask[c]=1;
}
}
return result;
}
/* }}} */
/* {{{ php_trim()
* 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 char *php_trim(char *c, int len, char *what, int what_len, zval *return_value, int mode TSRMLS_DC)
{
register int i;
int trimmed = 0;
char mask[256];
if (what) {
php_charmask(what, what_len, mask TSRMLS_CC);
} else {
php_charmask(" \n\r\t\v\0", 6, mask TSRMLS_CC);
}
if (mode & 1) {
for (i = 0; i < len; i++) {
if (mask[(unsigned char)c[i]]) {
trimmed++;
} else {
break;
}
}
len -= trimmed;
c += trimmed;
}
if (mode & 2) {
for (i = len - 1; i >= 0; i--) {
if (mask[(unsigned char)c[i]]) {
len--;
} else {
break;
}
}
}
if (return_value) {
RETVAL_STRINGL(c, len, 1);
} else {
return estrndup(c, len);
}
return "";
}
/* }}} */
/* {{{ php_do_trim
* Base for trim(), rtrim() and ltrim() functions.
*/
static void php_do_trim(INTERNAL_FUNCTION_PARAMETERS, int mode)
{
zval **str;
zval **what = NULL;
int argc = ZEND_NUM_ARGS();
if (argc < 1 || argc > 2 || zend_get_parameters_ex(argc, &str, &what) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(str);
if (argc > 1) {
convert_to_string_ex(what);
php_trim(Z_STRVAL_PP(str), Z_STRLEN_PP(str), Z_STRVAL_PP(what), Z_STRLEN_PP(what), return_value, mode TSRMLS_CC);
} else {
php_trim(Z_STRVAL_PP(str), Z_STRLEN_PP(str), NULL, 0, return_value, mode TSRMLS_CC);
}
}
/* }}} */
/* {{{ proto string trim(string str [, string character_mask])
Strips whitespace from the beginning and end of a string */
PHP_FUNCTION(trim)
{
php_do_trim(INTERNAL_FUNCTION_PARAM_PASSTHRU, 3);
}
/* }}} */
/* {{{ proto string rtrim(string str [, string character_mask])
Removes trailing whitespace */
PHP_FUNCTION(rtrim)
{
php_do_trim(INTERNAL_FUNCTION_PARAM_PASSTHRU, 2);
}
/* }}} */
/* {{{ proto string ltrim(string str [, string character_mask])
Strips whitespace from the beginning of a string */
PHP_FUNCTION(ltrim)
{
php_do_trim(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1);
}
/* }}} */
/* {{{ proto string wordwrap(string str [, int width [, string break [, boolean cut]]])
Wraps buffer to selected number of characters using string break char */
PHP_FUNCTION(wordwrap)
{
const char *text, *breakchar = "\n";
char *newtext;
int textlen, breakcharlen = 1, newtextlen, chk;
size_t alloced;
long current = 0, laststart = 0, lastspace = 0;
long linelength = 75;
zend_bool docut = 0;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|lsb", &text, &textlen, &linelength, &breakchar, &breakcharlen, &docut) == FAILURE) {
return;
}
if (textlen == 0) {
RETURN_EMPTY_STRING();
}
if (linelength == 0 && docut) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Can't force cut when width is zero.");
RETURN_FALSE;
}
/* Special case for a single-character break as it needs no
additional storage space */
if (breakcharlen == 1 && !docut) {
newtext = estrndup(text, textlen);
laststart = lastspace = 0;
for (current = 0; current < textlen; current++) {
if (text[current] == breakchar[0]) {
laststart = lastspace = current;
} else if (text[current] == ' ') {
if (current - laststart >= linelength) {
newtext[current] = breakchar[0];
laststart = current + 1;
}
lastspace = current;
} else if (current - laststart >= linelength && laststart != lastspace) {
newtext[lastspace] = breakchar[0];
laststart = lastspace + 1;
}
}
RETURN_STRINGL(newtext, textlen, 0);
} else {
/* Multiple character line break or forced cut */
if (linelength > 0) {
chk = (int)(textlen/linelength + 1);
newtext = safe_emalloc(chk, breakcharlen, textlen + 1);
alloced = textlen + chk * breakcharlen + 1;
} else {
chk = textlen;
alloced = textlen * (breakcharlen + 1) + 1;
newtext = safe_emalloc(textlen, (breakcharlen + 1), 1);
}
/* now keep track of the actual new text length */
newtextlen = 0;
laststart = lastspace = 0;
for (current = 0; current < textlen; current++) {
if (chk <= 0) {
alloced += (int) (((textlen - current + 1)/linelength + 1) * breakcharlen) + 1;
newtext = erealloc(newtext, alloced);
chk = (int) ((textlen - current)/linelength) + 1;
}
/* when we hit an existing break, copy to new buffer, and
* fix up laststart and lastspace */
if (text[current] == breakchar[0]
&& current + breakcharlen < textlen
&& !strncmp(text+current, breakchar, breakcharlen)) {
memcpy(newtext+newtextlen, text+laststart, current-laststart+breakcharlen);
newtextlen += current-laststart+breakcharlen;
current += breakcharlen - 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 (text[current] == ' ') {
if (current - laststart >= linelength) {
memcpy(newtext+newtextlen, text+laststart, current-laststart);
newtextlen += current - laststart;
memcpy(newtext+newtextlen, breakchar, breakcharlen);
newtextlen += breakcharlen;
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(newtext+newtextlen, text+laststart, current-laststart);
newtextlen += current - laststart;
memcpy(newtext+newtextlen, breakchar, breakcharlen);
newtextlen += breakcharlen;
laststart = lastspace = current;
chk--;
}
/* if the current word puts us over the linelength, copy
* back up until the last space, insert a break, and move
* up the laststart */
else if (current - laststart >= linelength
&& laststart < lastspace) {
memcpy(newtext+newtextlen, text+laststart, lastspace-laststart);
newtextlen += lastspace - laststart;
memcpy(newtext+newtextlen, breakchar, breakcharlen);
newtextlen += breakcharlen;
laststart = lastspace = lastspace + 1;
chk--;
}
}
/* copy over any stragglers */
if (laststart != current) {
memcpy(newtext+newtextlen, text+laststart, current-laststart);
newtextlen += current - laststart;
}
newtext[newtextlen] = '\0';
/* free unused memory */
newtext = erealloc(newtext, newtextlen+1);
RETURN_STRINGL(newtext, newtextlen, 0);
}
}
/* }}} */
/* {{{ php_explode
*/
PHPAPI void php_explode(zval *delim, zval *str, zval *return_value, int limit)
{
char *p1, *p2, *endp;
endp = Z_STRVAL_P(str) + Z_STRLEN_P(str);
p1 = Z_STRVAL_P(str);
p2 = php_memnstr(Z_STRVAL_P(str), Z_STRVAL_P(delim), Z_STRLEN_P(delim), endp);
if (p2 == NULL) {
add_next_index_stringl(return_value, p1, Z_STRLEN_P(str), 1);
} else {
do {
add_next_index_stringl(return_value, p1, p2 - p1, 1);
p1 = p2 + Z_STRLEN_P(delim);
} while ((p2 = php_memnstr(p1, Z_STRVAL_P(delim), Z_STRLEN_P(delim), endp)) != NULL &&
(limit == -1 || --limit > 1));
if (p1 <= endp)
add_next_index_stringl(return_value, p1, endp-p1, 1);
}
}
/* }}} */
/* {{{ php_explode_negative_limit
*/
PHPAPI void php_explode_negative_limit(zval *delim, zval *str, zval *return_value, int limit)
{
#define EXPLODE_ALLOC_STEP 50
char *p1, *p2, *endp;
int allocated = EXPLODE_ALLOC_STEP, found = 0, i = 0, to_return = 0;
char **positions = safe_emalloc(allocated, sizeof(char *), 0);
endp = Z_STRVAL_P(str) + Z_STRLEN_P(str);
p1 = Z_STRVAL_P(str);
p2 = php_memnstr(Z_STRVAL_P(str), Z_STRVAL_P(delim), Z_STRLEN_P(delim), endp);
if (p2 == NULL) {
/*
do nothing since limit <= -1, thus if only one chunk - 1 + (limit) <= 0
by doing nothing we return empty array
*/
} else {
positions[found++] = p1;
do {
if (found >= allocated) {
allocated = found + EXPLODE_ALLOC_STEP;/* make sure we have enough memory */
positions = erealloc(positions, allocated*sizeof(char *));
}
positions[found++] = p1 = p2 + Z_STRLEN_P(delim);
} while ((p2 = php_memnstr(p1, Z_STRVAL_P(delim), Z_STRLEN_P(delim), endp)) != NULL);
to_return = limit + found;
/* limit is at least -1 therefore no need of bounds checking : i will be always less than found */
for (i = 0;i < to_return;i++) { /* this checks also for to_return > 0 */
add_next_index_stringl(return_value, positions[i],
(positions[i+1] - Z_STRLEN_P(delim)) - positions[i],
1
);
}
}
efree(positions);
#undef EXPLODE_ALLOC_STEP
}
/* }}} */
/* {{{ proto array explode(string separator, string str [, int limit])
Splits a string on string separator and return array of components. If limit is positive only limit number of components is returned. If limit is negative all components except the last abs(limit) are returned. */
PHP_FUNCTION(explode)
{
zval **str, **delim, **zlimit = NULL;
int limit = -1;
int argc = ZEND_NUM_ARGS();
if (argc < 2 || argc > 3 || zend_get_parameters_ex(argc, &delim, &str, &zlimit) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(str);
convert_to_string_ex(delim);
if (argc > 2) {
convert_to_long_ex(zlimit);
limit = Z_LVAL_PP(zlimit);
}
if (! Z_STRLEN_PP(delim)) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Empty delimiter.");
RETURN_FALSE;
}
array_init(return_value);
if (! Z_STRLEN_PP(str)) {
add_next_index_stringl(return_value, "", sizeof("") - 1, 1);
return;
}
if (limit == 0 || limit == 1) {
add_index_stringl(return_value, 0, Z_STRVAL_PP(str), Z_STRLEN_PP(str), 1);
} else if (limit < 0 && argc == 3) {
php_explode_negative_limit(*delim, *str, return_value, limit);
} else {
php_explode(*delim, *str, return_value, limit);
}
}
/* }}} */
/* {{{ proto string join(array src, string glue)
An alias for implode */
/* }}} */
/* {{{ php_implode
*/
PHPAPI void php_implode(zval *delim, zval *arr, zval *return_value TSRMLS_DC)
{
zval **tmp;
HashPosition pos;
smart_str implstr = {0};
int numelems, i = 0;
zval tmp_val;
int str_len;
numelems = zend_hash_num_elements(Z_ARRVAL_P(arr));
if (numelems == 0) {
RETURN_EMPTY_STRING();
}
zend_hash_internal_pointer_reset_ex(Z_ARRVAL_P(arr), &pos);
while (zend_hash_get_current_data_ex(Z_ARRVAL_P(arr), (void **) &tmp, &pos) == SUCCESS) {
switch ((*tmp)->type) {
case IS_STRING:
smart_str_appendl(&implstr, Z_STRVAL_PP(tmp), Z_STRLEN_PP(tmp));
break;
case IS_LONG: {
char stmp[MAX_LENGTH_OF_LONG + 1];
str_len = sprintf(stmp, "%ld", Z_LVAL_PP(tmp));
smart_str_appendl(&implstr, stmp, str_len);
}
break;
case IS_BOOL:
if (Z_LVAL_PP(tmp) == 1) {
smart_str_appendl(&implstr, "1", sizeof("1")-1);
}
break;
case IS_NULL:
break;
case IS_DOUBLE: {
char *stmp;
str_len = spprintf(&stmp, 0, "%.*G", (int) EG(precision), Z_DVAL_PP(tmp));
smart_str_appendl(&implstr, stmp, str_len);
efree(stmp);
}
break;
case IS_OBJECT: {
int copy;
zval expr;
zend_make_printable_zval(*tmp, &expr, ©);
smart_str_appendl(&implstr, Z_STRVAL(expr), Z_STRLEN(expr));
if (copy) {
zval_dtor(&expr);
}
}
break;
default:
tmp_val = **tmp;
zval_copy_ctor(&tmp_val);
convert_to_string(&tmp_val);
smart_str_appendl(&implstr, Z_STRVAL(tmp_val), Z_STRLEN(tmp_val));
zval_dtor(&tmp_val);
break;
}
if (++i != numelems) {
smart_str_appendl(&implstr, Z_STRVAL_P(delim), Z_STRLEN_P(delim));
}
zend_hash_move_forward_ex(Z_ARRVAL_P(arr), &pos);
}
smart_str_0(&implstr);
if (implstr.len) {
RETURN_STRINGL(implstr.c, implstr.len, 0);
} else {
smart_str_free(&implstr);
RETURN_EMPTY_STRING();
}
}
/* }}} */
/* {{{ proto string implode([string glue,] array pieces)
Joins array elements placing glue string between items and return one string */
PHP_FUNCTION(implode)
{
zval **arg1 = NULL, **arg2 = NULL, *delim, *arr;
int argc = ZEND_NUM_ARGS();
HashPosition pos;
if (argc < 1 || argc > 2 ||
zend_get_parameters_ex(argc, &arg1, &arg2) == FAILURE) {
WRONG_PARAM_COUNT;
}
if (argc == 1) {
if (Z_TYPE_PP(arg1) != IS_ARRAY) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Argument to implode must be an array.");
return;
}
MAKE_STD_ZVAL(delim);
#define _IMPL_EMPTY ""
ZVAL_STRINGL(delim, _IMPL_EMPTY, sizeof(_IMPL_EMPTY) - 1, 0);
SEPARATE_ZVAL(arg1);
arr = *arg1;
} else {
if (Z_TYPE_PP(arg1) == IS_ARRAY) {
arr = *arg1;
convert_to_string_ex(arg2);
delim = *arg2;
} else if (Z_TYPE_PP(arg2) == IS_ARRAY) {
arr = *arg2;
convert_to_string_ex(arg1);
delim = *arg1;