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php-src/ext/standard/string.c
Egon Schmid 565c322797 Here was also something missing.
1999-09-20 20:05:26 +00:00

2046 lines
44 KiB
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/*
+----------------------------------------------------------------------+
| PHP version 4.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997, 1998, 1999 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.0 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_0.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@lerdorf.on.ca> |
| Stig Sæther Bakken <ssb@fast.no> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
/* Synced with php3 revision 1.193 1999-06-16 [ssb] */
#include <stdio.h>
#include "php.h"
#include "reg.h"
#include "post.h"
#include "php3_string.h"
#ifdef HAVE_LOCALE_H
# include <locale.h>
#endif
#include "zend_execute.h"
#include "php_globals.h"
static char hexconvtab[] = "0123456789abcdef";
static char *php_bin2hex(const unsigned char *old, const size_t oldlen, size_t *newlen)
{
unsigned char *new = NULL;
size_t i, j;
new = (char *) emalloc(oldlen * 2 * sizeof(char));
if(!new) {
return new;
}
for(i = j = 0; i < oldlen; i++) {
new[j++] = hexconvtab[old[i] >> 4];
new[j++] = hexconvtab[old[i] & 15];
}
if(newlen) *newlen = oldlen * 2 * sizeof(char);
return new;
}
/* proto bin2hex(string data)
converts the binary representation of data to hex */
PHP_FUNCTION(bin2hex)
{
pval *data;
char *new;
size_t newlen;
if(ARG_COUNT(ht) != 1 || getParameters(ht, 1, &data) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(data);
new = php_bin2hex(data->value.str.val, data->value.str.len, &newlen);
if(!new) {
RETURN_FALSE;
}
RETURN_STRINGL(new, newlen, 0);
}
/* {{{ proto int strspn(string str, string mask)
Find length of initial segment consisting entirely of characters found in mask */
PHP_FUNCTION(strspn)
{
pval *s1,*s2;
if (ARG_COUNT(ht)!=2 || getParameters(ht, 2, &s1, &s2) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(s1);
convert_to_string(s2);
RETURN_LONG(strspn(s1->value.str.val,s2->value.str.val));
}
/* }}} */
/* {{{ proto int strcspn(string str, string mask)
Find length of initial segment consisting entirely of characters not found in mask */
PHP_FUNCTION(strcspn)
{
pval *s1,*s2;
if (ARG_COUNT(ht)!=2 || getParameters(ht, 2, &s1, &s2) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(s1);
convert_to_string(s2);
RETURN_LONG(strcspn(s1->value.str.val,s2->value.str.val));
}
/* }}} */
PHPAPI void _php3_trim(pval *str, pval * return_value, int mode)
/* mode 1 : trim left
mode 2 : trim right
mode 3 : trim left and right
*/
{
register int i;
int len = str->value.str.len;
int trimmed = 0;
char *c = str->value.str.val;
if (mode & 1) {
for (i = 0; i < len; i++) {
if (c[i] == ' ' || c[i] == '\n' || c[i] == '\r' ||
c[i] == '\t' || c[i] == '\v') {
trimmed++;
} else {
break;
}
}
len -= trimmed;
c += trimmed;
}
if (mode & 2) {
for (i = len - 1; i >= 0; i--) {
if (c[i] == ' ' || c[i] == '\n' || c[i] == '\r' ||
c[i] == '\t' || c[i] == '\v') {
len--;
} else {
break;
}
}
}
RETVAL_STRINGL(c, len, 1);
}
/* {{{ proto string rtrim(string str)
An alias for chop */
/* }}} */
/* {{{ proto string chop(string str)
Remove trailing whitespace */
PHP_FUNCTION(chop)
{
pval *str;
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &str) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
if (str->type == IS_STRING) {
_php3_trim(str, return_value, 2);
return;
}
RETURN_FALSE;
}
/* }}} */
/* {{{ proto string trim(string str)
Strip whitespace from the beginning and end of a string */
PHP_FUNCTION(trim)
{
pval *str;
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &str) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
if (str->type == IS_STRING) {
_php3_trim(str, return_value, 3);
return;
}
RETURN_FALSE;
}
/* }}} */
/* {{{ proto string ltrim(string str)
Strip whitespace from the beginning of a string */
PHP_FUNCTION(ltrim)
{
pval *str;
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &str) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
if (str->type == IS_STRING) {
_php3_trim(str, return_value, 1);
return;
}
RETURN_FALSE;
}
/* }}} */
void _php3_explode(pval *delim, pval *str, pval *return_value)
{
char *work_str, *p1, *p2;
int i = 0;
work_str = p1 = estrndup(str->value.str.val,str->value.str.len);
p2 = strstr(p1, delim->value.str.val);
if (p2 == NULL) {
add_index_string(return_value, i++, p1, 1);
} else do {
p2[0] = 0;
add_index_string(return_value, i++, p1, 1);
p1 = p2 + delim->value.str.len;
} while ((p2 = strstr(p1, delim->value.str.val)) && p2 != work_str);
if (p1 != work_str) {
add_index_string(return_value, i++, p1, 1);
}
efree(work_str);
}
/* {{{ proto array explode(string separator, string str)
Split a string on string separator and return array of components */
PHP_FUNCTION(explode)
{
pval *str, *delim;
if (ARG_COUNT(ht) != 2 || getParameters(ht, 2, &delim, &str) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
convert_to_string(delim);
if (strlen(delim->value.str.val)==0) {
/* the delimiter must be a valid C string that's at least 1 character long */
php_error(E_WARNING,"Empty delimiter");
RETURN_FALSE;
}
if (array_init(return_value) == FAILURE) {
return;
}
_php3_explode(delim, str, return_value);
}
/* }}} */
/* {{{ proto string join(array src, string glue)
An alias for implode */
/* }}} */
void _php3_implode(pval *delim, pval *arr, pval *return_value)
{
pval **tmp;
int len = 0, count = 0;
/* convert everything to strings, and calculate length */
zend_hash_internal_pointer_reset(arr->value.ht);
while (zend_hash_get_current_data(arr->value.ht, (void **) &tmp) == SUCCESS) {
SEPARATE_ZVAL(tmp);
convert_to_string(*tmp);
if ((*tmp)->type == IS_STRING && (*tmp)->value.str.val != undefined_variable_string) {
len += (*tmp)->value.str.len;
if (count>0) {
len += delim->value.str.len;
}
count++;
}
zend_hash_move_forward(arr->value.ht);
}
/* do it */
return_value->value.str.val = (char *) emalloc(len + 1);
return_value->value.str.val[0] = '\0';
return_value->value.str.val[len] = '\0';
zend_hash_internal_pointer_reset(arr->value.ht);
while (zend_hash_get_current_data(arr->value.ht, (void **) &tmp) == SUCCESS) {
if ((*tmp)->type == IS_STRING && (*tmp)->value.str.val != undefined_variable_string) {
count--;
strcat(return_value->value.str.val, (*tmp)->value.str.val);
if (count > 0) {
strcat(return_value->value.str.val, delim->value.str.val);
}
}
zend_hash_move_forward(arr->value.ht);
}
return_value->type = IS_STRING;
return_value->value.str.len = len;
}
/* {{{ proto string implode(array src, string glue)
Join array elements placing glue string between items and return one string */
PHP_FUNCTION(implode)
{
pval *arg1, *arg2, *delim, *arr;
if (ARG_COUNT(ht) != 2 || getParameters(ht, 2, &arg1, &arg2) == FAILURE) {
WRONG_PARAM_COUNT;
}
if (arg1->type == IS_ARRAY && arg2->type == IS_STRING) {
arr = arg1;
delim = arg2;
} else if (arg2->type == IS_ARRAY) {
convert_to_string(arg1);
arr = arg2;
delim = arg1;
} else {
php_error(E_WARNING, "Bad arguments to %s()",
get_active_function_name());
return;
}
_php3_implode(delim, arr, return_value);
}
/* }}} */
#ifndef THREAD_SAFE
char *strtok_string;
#endif
/* {{{ proto string strtok([string str,] string token)
Tokenize a string */
PHP_FUNCTION(strtok)
{
pval *str, *tok;
#ifndef THREAD_SAFE
static char *strtok_pos1 = NULL;
static char *strtok_pos2 = NULL;
#endif
char *token = NULL, *tokp=NULL;
char *first = NULL;
int argc;
argc = ARG_COUNT(ht);
if ((argc == 1 && getParameters(ht, 1, &tok) == FAILURE) ||
(argc == 2 && getParameters(ht, 2, &str, &tok) == FAILURE) ||
argc < 1 || argc > 2) {
WRONG_PARAM_COUNT;
}
convert_to_string(tok);
tokp = token = tok->value.str.val;
if (argc == 2) {
convert_to_string(str);
STR_FREE(strtok_string);
strtok_string = estrndup(str->value.str.val,str->value.str.len);
strtok_pos1 = strtok_string;
strtok_pos2 = NULL;
}
if (strtok_pos1 && *strtok_pos1) {
for ( /* NOP */ ; token && *token; token++) {
strtok_pos2 = strchr(strtok_pos1, (int) *token);
if (!first || (strtok_pos2 && strtok_pos2 < first)) {
first = strtok_pos2;
}
} /* NB: token is unusable now */
strtok_pos2 = first;
if (strtok_pos2) {
*strtok_pos2 = '\0';
}
RETVAL_STRING(strtok_pos1,1);
#if 0
/* skip 'token' white space for next call to strtok */
while (strtok_pos2 &&
strchr(tokp, *(strtok_pos2+1))) {
strtok_pos2++;
}
#endif
if (strtok_pos2)
strtok_pos1 = strtok_pos2 + 1;
else
strtok_pos1 = NULL;
} else {
RETVAL_FALSE;
}
}
/* }}} */
PHPAPI char *_php3_strtoupper(char *s)
{
char *c;
int ch;
c = s;
while (*c) {
ch = toupper((unsigned char)*c);
*c++ = ch;
}
return (s);
}
/* {{{ proto string strtoupper(string str)
Make a string uppercase */
PHP_FUNCTION(strtoupper)
{
pval *arg;
char *ret;
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &arg)) {
WRONG_PARAM_COUNT;
}
convert_to_string(arg);
ret = _php3_strtoupper(arg->value.str.val);
RETVAL_STRING(ret,1);
}
/* }}} */
PHPAPI char *_php3_strtolower(char *s)
{
register int ch;
char *c;
c = s;
while (*c) {
ch = tolower((unsigned char)*c);
*c++ = ch;
}
return (s);
}
/* {{{ proto string strtolower(string str)
Make a string lowercase */
PHP_FUNCTION(strtolower)
{
pval *str;
char *ret;
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &str)) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
ret = _php3_strtolower(str->value.str.val);
RETVAL_STRING(ret,1);
}
/* }}} */
/* {{{ proto string basename(string path)
Return the filename component of the path */
PHP_FUNCTION(basename)
{
pval *str;
char *ret, *c;
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &str)) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
ret = estrdup(str->value.str.val);
c = ret + str->value.str.len -1;
while (*c == '/'
#ifdef MSVC5
|| *c == '\\'
#endif
)
c--;
*(c + 1) = '\0';
if ((c = strrchr(ret, '/'))
#ifdef MSVC5
|| (c = strrchr(ret, '\\'))
#endif
) {
RETVAL_STRING(c + 1,1);
} else {
RETVAL_STRING(str->value.str.val,1);
}
efree(ret);
}
/* }}} */
PHPAPI void _php3_dirname(char *str, int len) {
register char *c;
c = str + len - 1;
while (*c == '/'
#ifdef MSVC5
|| *c == '\\'
#endif
)
c--; /* strip trailing slashes */
*(c + 1) = '\0';
if ((c = strrchr(str, '/'))
#ifdef MSVC5
|| (c = strrchr(str, '\\'))
#endif
)
*c='\0';
}
/* {{{ proto string dirname(string path)
Return the directory name component of the path */
PHP_FUNCTION(dirname)
{
pval *str;
char *ret;
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &str)) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
ret = estrdup(str->value.str.val);
_php3_dirname(ret,str->value.str.len);
RETVAL_STRING(ret,1);
efree(ret);
}
/* }}} */
/* case insensitve strstr */
PHPAPI char *php3i_stristr(unsigned char *s, unsigned char *t)
{
int i, j, k, l;
for (i = 0; s[i]; i++) {
for (j = 0, l = k = i; s[k] && t[j] &&
tolower(s[k]) == tolower(t[j]); j++, k++)
;
if (t[j] == '\0')
return s + l;
}
return NULL;
}
/* {{{ proto string stristr(string haystack, string needle)
Find first occurrence of a string within another, case insensitive */
PHP_FUNCTION(stristr)
{
pval *haystack, *needle;
char *found = NULL;
if (ARG_COUNT(ht) != 2 || getParameters(ht, 2, &haystack, &needle) ==
FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(haystack);
convert_to_string(needle);
if (strlen(needle->value.str.val)==0) {
php_error(E_WARNING,"Empty delimiter");
RETURN_FALSE;
}
found = php3i_stristr(haystack->value.str.val, needle->value.str.val);
if (found) {
RETVAL_STRING(found,1);
} else {
RETVAL_FALSE;
}
}
/* }}} */
/* {{{ proto string strstr(string haystack, string needle)
Find first occurrence of a string within another */
PHP_FUNCTION(strstr)
{
pval *haystack, *needle;
char *found = NULL;
if (ARG_COUNT(ht) != 2 || getParameters(ht, 2, &haystack, &needle) ==
FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(haystack);
if (needle->type == IS_STRING) {
if (strlen(needle->value.str.val)==0) {
php_error(E_WARNING,"Empty delimiter");
RETURN_FALSE;
}
found = strstr(haystack->value.str.val, needle->value.str.val);
} else {
convert_to_long(needle);
found = strchr(haystack->value.str.val, (char) needle->value.lval);
}
if (found) {
RETVAL_STRING(found,1);
} else {
RETVAL_FALSE;
}
}
/* }}} */
/* {{{ proto string strchr(string haystack, string needle)
An alias for strstr */
/* }}} */
/* {{{ proto int strpos(string haystack, string needle [, int offset])
Find position of first occurrence of a string within another */
PHP_FUNCTION(strpos)
{
pval *haystack, *needle, *OFFSET;
int offset = 0;
char *found = NULL;
switch(ARG_COUNT(ht)) {
case 2:
if (getParameters(ht, 2, &haystack, &needle) == FAILURE) {
WRONG_PARAM_COUNT;
}
break;
case 3:
if (getParameters(ht, 3, &haystack, &needle, &OFFSET) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long(OFFSET);
offset = OFFSET->value.lval;
break;
default:
WRONG_PARAM_COUNT;
}
convert_to_string(haystack);
if (offset > haystack->value.str.len) {
php_error(E_WARNING,"offset not contained in string");
RETURN_FALSE;
}
if (needle->type == IS_STRING) {
if (needle->value.str.len==0) {
php_error(E_WARNING,"Empty delimiter");
RETURN_FALSE;
}
found = strstr(haystack->value.str.val+offset, needle->value.str.val);
} else {
convert_to_long(needle);
found = strchr(haystack->value.str.val+offset, (char) needle->value.lval);
}
if (found) {
RETVAL_LONG(found - haystack->value.str.val);
} else {
RETVAL_FALSE;
}
}
/* }}} */
/* {{{ proto int strrpos(string haystack, string needle)
Find the last occurrence of a character in a string within another */
PHP_FUNCTION(strrpos)
{
pval *haystack, *needle;
char *found = NULL;
if (ARG_COUNT(ht) != 2 || getParameters(ht, 2, &haystack, &needle) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(haystack);
if (needle->type == IS_STRING) {
found = strrchr(haystack->value.str.val, *needle->value.str.val);
} else {
convert_to_long(needle);
found = strrchr(haystack->value.str.val, (char) needle->value.lval);
}
if (found) {
RETVAL_LONG(haystack->value.str.len - strlen(found));
} else {
RETVAL_FALSE;
}
}
/* }}} */
/* {{{ proto string strrchr(string haystack, string needle)
Find the last occurrence of a character in a string within another */
PHP_FUNCTION(strrchr)
{
pval *haystack, *needle;
char *found = NULL;
if (ARG_COUNT(ht) != 2 || getParameters(ht, 2, &haystack, &needle) ==
FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(haystack);
if (needle->type == IS_STRING) {
found = strrchr(haystack->value.str.val, *needle->value.str.val);
} else {
convert_to_long(needle);
found = strrchr(haystack->value.str.val, needle->value.lval);
}
if (found) {
RETVAL_STRING(found,1);
} else {
RETVAL_FALSE;
}
}
/* }}} */
static char *
_php3_chunk_split(char *src, int srclen, char *end, int endlen,
int chunklen, int *destlen)
{
char *dest;
char *p, *q;
int chunks; /* complete chunks! */
int restlen;
chunks = srclen / chunklen;
restlen = srclen - chunks * chunklen; /* srclen % chunklen */
dest = emalloc((srclen + (chunks + 1) * endlen + 1) * sizeof(char));
for(p = src, q = dest; p < (src + srclen - chunklen + 1); ) {
memcpy(q, p, chunklen);
q += chunklen;
memcpy(q, end, endlen);
q += endlen;
p += chunklen;
}
if(restlen) {
memcpy(q, p, restlen);
q += restlen;
memcpy(q, end, endlen);
q += endlen;
}
*q = '\0';
if (destlen) {
*destlen = q - dest;
}
return(dest);
}
/* {{{ proto string chunk_split(string str [, int chunklen [, string ending]])
Return split line */
PHP_FUNCTION(chunk_split)
{
pval *p_str, *p_chunklen, *p_ending;
int argc;
char *result;
char *end = "\r\n";
int endlen = 2;
int chunklen = 76;
int result_len;
argc = ARG_COUNT(ht);
if (argc < 1 || argc > 3 ||
getParameters(ht, argc, &p_str, &p_chunklen, &p_ending) == FAILURE) {
WRONG_PARAM_COUNT;
}
switch(argc) {
case 3:
convert_to_string(p_ending);
end = p_ending->value.str.val;
endlen = p_ending->value.str.len;
case 2:
convert_to_long(p_chunklen);
chunklen = p_chunklen->value.lval;
case 1:
convert_to_string(p_str);
}
if(chunklen == 0) {
php_error(E_WARNING, "chunk length is 0");
RETURN_FALSE;
}
result = _php3_chunk_split(p_str->value.str.val, p_str->value.str.len,
end, endlen, chunklen, &result_len);
if(result) {
RETVAL_STRINGL(result, result_len, 0);
} else {
RETURN_FALSE;
}
}
/* }}} */
/* {{{ proto string substr(string str, int start [, int length])
Return part of a string */
PHP_FUNCTION(substr)
{
pval *string, *from, *len;
int argc, l;
int f;
argc = ARG_COUNT(ht);
if ((argc == 2 && getParameters(ht, 2, &string, &from) == FAILURE) ||
(argc == 3 && getParameters(ht, 3, &string, &from, &len) == FAILURE) ||
argc < 2 || argc > 3) {
WRONG_PARAM_COUNT;
}
convert_to_string(string);
convert_to_long(from);
f = from->value.lval;
if (argc == 2) {
l = string->value.str.len;
} else {
convert_to_long(len);
l = len->value.lval;
}
/* if "from" position is negative, count start position from the end
* of the string
*/
if (f < 0) {
f = string->value.str.len + f;
if (f < 0) {
f = 0;
}
}
/* if "length" position is negative, set it to the length
* needed to stop that many chars from the end of the string
*/
if (l < 0) {
l = (string->value.str.len - f) + l;
if (l < 0) {
l = 0;
}
}
if (f >= (int)string->value.str.len) {
RETURN_FALSE;
}
if((f+l) > (int)string->value.str.len) {
l = (int)string->value.str.len - f;
}
RETVAL_STRINGL(string->value.str.val + f, l, 1);
}
/* }}} */
/* {{{ proto string quotemeta(string str)
Quote meta characters */
PHP_FUNCTION(quotemeta)
{
pval *arg;
char *str, *old;
char *p, *q;
char c;
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &arg) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(arg);
old = arg->value.str.val;
if (!*old) {
RETURN_FALSE;
}
str = emalloc(2 * arg->value.str.len + 1);
for(p = old, q = str; (c = *p); p++) {
switch(c) {
case '.':
case '\\':
case '+':
case '*':
case '?':
case '[':
case '^':
case ']':
case '$':
case '(':
case ')':
*q++ = '\\';
/* break is missing _intentionally_ */
default:
*q++ = c;
}
}
*q = 0;
RETVAL_STRING(erealloc(str, q - str + 1), 0);
}
/* }}} */
/* {{{ proto int ord(string character)
Return ASCII value of character */
PHP_FUNCTION(ord)
{
pval *str;
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &str) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
RETVAL_LONG((unsigned char)str->value.str.val[0]);
}
/* }}} */
/* {{{ proto string chr(int ascii)
Convert ASCII code to a character */
PHP_FUNCTION(chr)
{
pval *num;
char temp[2];
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long(num);
temp[0] = (char) num->value.lval;
temp[1] = '\0';
RETVAL_STRINGL(temp, 1,1);
}
/* }}} */
/* {{{ proto string ucfirst(string str)
Make a string's first character uppercase */
PHP_FUNCTION(ucfirst)
{
pval *arg;
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &arg) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(arg);
if (!*arg->value.str.val) {
RETURN_FALSE;
}
*arg->value.str.val = toupper((unsigned char)*arg->value.str.val);
RETVAL_STRING(arg->value.str.val,1);
}
/* }}} */
/* {{{ proto string ucwords(string str)
Uppercase the first character of every word in a string */
PHP_FUNCTION(ucwords)
{
pval *arg;
char *r;
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &arg) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(arg);
if (!*arg->value.str.val) {
RETURN_FALSE;
}
*arg->value.str.val = toupper((unsigned char)*arg->value.str.val);
r=arg->value.str.val;
while((r=strstr(r," "))){
if(*(r+1)){
r++;
*r=toupper((unsigned char)*r);
} else {
break;
}
}
RETVAL_STRING(arg->value.str.val,1);
}
/* }}} */
PHPAPI char *_php3_strtr(char *string, int len, char *str_from,
char *str_to, int trlen)
{
int i;
unsigned char xlat[256];
if ((trlen < 1) || (len < 1)) {
return string;
}
for (i = 0; i < 256; xlat[i] = i, i++);
for (i = 0; i < trlen; i++) {
xlat[(unsigned char) str_from[i]] = str_to[i];
}
for (i = 0; i < len; i++) {
string[i] = xlat[(unsigned char) string[i]];
}
return string;
}
/* {{{ proto string strtr(string str, string from, string to)
Translate characters in str using given translation tables */
PHP_FUNCTION(strtr)
{ /* strtr(STRING,FROM,TO) */
pval *str, *from, *to;
if (ARG_COUNT(ht) != 3 || getParameters(ht, 3, &str, &from, &to) ==
FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
convert_to_string(from);
convert_to_string(to);
RETVAL_STRING(_php3_strtr(str->value.str.val,
str->value.str.len,
from->value.str.val,
to->value.str.val,
MIN(from->value.str.len,to->value.str.len)),
1);
}
/* }}} */
/* {{{ proto string strrev(string str)
Reverse a string */
PHP_FUNCTION(strrev)
{
pval *str;
int i,len;
char c;
if (ARG_COUNT(ht)!=1 || getParameters(ht, 1, &str)==FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
len = str->value.str.len;
for (i=0; i<len-1-i; i++) {
c=str->value.str.val[i];
str->value.str.val[i] = str->value.str.val[len-1-i];
str->value.str.val[len-1-i]=c;
}
*return_value = *str;
pval_copy_constructor(return_value);
}
/* }}} */
static void _php3_similar_str(const char *txt1, int len1, const char *txt2,
int len2, int *pos1, int *pos2, int *max)
{
char *p, *q;
char *end1 = (char *) txt1 + len1;
char *end2 = (char *) txt2 + len2;
int l;
*max = 0;
for (p = (char *) txt1; p < end1; p++) {
for (q = (char *) txt2; q < end2; q++) {
for (l = 0; (p + l < end1) && (q + l < end2) && (p[l] == q[l]);
l++);
if (l > *max) {
*max = l;
*pos1 = p - txt1;
*pos2 = q - txt2;
}
}
}
}
static int _php3_similar_char(const char *txt1, int len1,
const char *txt2, int len2)
{
int sum;
int pos1, pos2, max;
_php3_similar_str(txt1, len1, txt2, len2, &pos1, &pos2, &max);
if ((sum = max)) {
if (pos1 && pos2)
sum += _php3_similar_char(txt1, pos1, txt2, pos2);
if ((pos1 + max < len1) && (pos2 + max < len2))
sum += _php3_similar_char(txt1 + pos1 + max, len1 - pos1 - max,
txt2 + pos2 + max, len2 - pos2 -max);
}
return sum;
}
/* {{{ proto int similar_text(string str1, string str2 [, double percent])
Calculates the similarity between two strings */
PHP_FUNCTION(similar_text)
{
pval *t1, *t2, *percent;
int ac = ARG_COUNT(ht);
int sim;
if (ac < 2 || ac > 3 ||
getParameters(ht, ac, &t1, &t2, &percent) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(t1);
convert_to_string(t2);
if (ac > 2) {
convert_to_double(percent);
}
if ((t1->value.str.len + t2->value.str.len) == 0) {
if(ac > 2) {
percent->value.dval = 0;
}
RETURN_LONG(0);
}
sim = _php3_similar_char(t1->value.str.val, t1->value.str.len,
t2->value.str.val, t2->value.str.len);
if (ac > 2) {
percent->value.dval = sim * 200.0 / (t1->value.str.len + t2->value.str.len);
}
RETURN_LONG(sim);
}
/* }}} */
/* be careful, this edits the string in-place */
PHPAPI void php_stripslashes(char *string, int *len)
{
char *s, *t;
int l;
char escape_char='\\';
PLS_FETCH();
if (PG(magic_quotes_sybase)) {
escape_char='\'';
}
if (len != NULL) {
l = *len;
} else {
l = strlen(string);
}
s = string;
t = string;
while (l > 0) {
if (*t == escape_char) {
t++; /* skip the slash */
if (len != NULL)
(*len)--;
l--;
if (l > 0) {
if(*t=='0') {
*s++='\0';
t++;
} else {
*s++ = *t++; /* preserve the next character */
}
l--;
}
} else {
if (s != t)
*s++ = *t++;
else {
s++;
t++;
}
l--;
}
}
if (s != t) {
*s = '\0';
}
}
/* {{{ proto string addcslashes(string str, string charlist)
Escape all chars mentioned in charlist with backslash. It creates
octal representations if asked to backslash characters with 8th bit set
or with ASCII<32 (except '\n', '\r', '\t' etc...) */
PHP_FUNCTION(addcslashes)
{
pval *str, *what;
if (ARG_COUNT(ht) != 2 || getParameters(ht, 2, &str, &what) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
convert_to_string(what);
return_value->value.str.val = php_addcslashes(str->value.str.val,str->value.str.len,&return_value->value.str.len,0,what->value.str.val,what->value.str.len);
return_value->type = IS_STRING;
}
/* }}} */
/* {{{ proto string addslashes(string str)
Escape single quote, double quotes and backslash characters in a string with backslashes */
PHP_FUNCTION(addslashes)
{
pval *str;
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &str) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
return_value->value.str.val = php_addslashes(str->value.str.val,str->value.str.len,&return_value->value.str.len,0);
return_value->type = IS_STRING;
}
/* }}} */
/* {{{ proto string stripcslashes(string str)
Strip backslashes from a string. Uses C-style conventions*/
PHP_FUNCTION(stripcslashes)
{
pval *str;
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &str) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
/* let RETVAL do the estrdup() */
RETVAL_STRING(str->value.str.val,1);
php_stripcslashes(return_value->value.str.val,&return_value->value.str.len);
}
/* }}} */
/* {{{ proto string stripslashes(string str)
Strip backslashes from a string */
PHP_FUNCTION(stripslashes)
{
pval *str;
if (ARG_COUNT(ht) != 1 || getParameters(ht, 1, &str) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
/* let RETVAL do the estrdup() */
RETVAL_STRING(str->value.str.val,1);
php_stripslashes(return_value->value.str.val,&return_value->value.str.len);
}
/* }}} */
#ifndef HAVE_STRERROR
#if !APACHE
char *strerror(int errnum)
{
extern int sys_nerr;
extern char *sys_errlist[];
#ifndef THREAD_SAFE
static char str_ebuf[40];
#endif
if ((unsigned int)errnum < sys_nerr) return(sys_errlist[errnum]);
(void)sprintf(str_ebuf, "Unknown error: %d", errnum);
return(str_ebuf);
}
#endif
#endif
PHPAPI void php_stripcslashes(char *str, int *len)
{
char *source,*target,*end;
int nlen = *len, i;
char numtmp[4];
for (source=str,end=str+nlen,target=str; source<end; source++) {
if (*source == '\\' && source+1<end) {
source++;
switch (*source) {
case 'n': *target++='\n'; nlen--; break;
case 'r': *target++='\r'; nlen--; break;
case 'a': *target++='\a'; nlen--; break;
case 't': *target++='\t'; nlen--; break;
case 'v': *target++='\v'; nlen--; break;
case 'b': *target++='\b'; nlen--; break;
case 'f': *target++='\f'; nlen--; break;
case '\\': *target++='\\'; nlen--; break;
case 'x': if (source+1<end && isxdigit((int)(*(source+1)))) {
numtmp[0] = *++source;
if (source+1<end && isxdigit((int)(*(source+1)))) {
numtmp[1] = *++source;
numtmp[2] = '\0';
nlen-=3;
} else {
numtmp[1] = '\0';
nlen-=2;
}
*target++=(char)strtol(numtmp, NULL, 16);
break;
}
/* break is left intentionally */
default: i=0;
while (source<end && *source>='0' && *source<='7' && i<3) {
numtmp[i++] = *source++;
}
if (i) {
numtmp[i]='\0';
*target++=(char)strtol(numtmp, NULL, 8);
nlen-=i;
source--;
} else {
*target++='\\';
*target++=*source;
}
}
} else {
*target++=*source;
}
}
*target='\0';
*len = nlen;
}
PHPAPI char *php_addcslashes(char *str, int length, int *new_length, int should_free, char *what, int wlength)
{
char flags[256];
char *new_str = emalloc((length?length:(length=strlen(str)))*4+1);
char *source,*target;
char *end;
char c;
int newlen;
if (!wlength) {
wlength = strlen(what);
}
if (!length) {
length = strlen(str);
}
memset(flags, '\0', sizeof(flags));
for (source=what,end=source+wlength; (c=*source) || source<end; source++) {
if (source+3<end && *(source+1) == '.' && *(source+2) == '.' && (unsigned char)*(source+3)>=(unsigned char)c) {
memset(flags+c, 1, (unsigned char)*(source+3)-(unsigned char)c+1);
source+=3;
} else
flags[(unsigned char)c]=1;
}
for (source=str,end=source+length,target=new_str; (c=*source) || source<end; source++) {
if (flags[(unsigned char)c]) {
if ((unsigned char)c<32 || (unsigned char)c>126) {
*target++ = '\\';
switch (c) {
case '\n': *target++ = 'n'; break;
case '\t': *target++ = 't'; break;
case '\r': *target++ = 'r'; break;
case '\a': *target++ = 'a'; break;
case '\v': *target++ = 'v'; break;
case '\b': *target++ = 'b'; break;
case '\f': *target++ = 'f'; break;
default: target += sprintf(target, "%03o", (unsigned char)c);
}
continue;
}
*target++ = '\\';
}
*target++ = c;
}
*target = 0;
newlen = target-new_str;
if (target-new_str<length*4) {
new_str = erealloc(new_str, newlen+1);
}
if (new_length) {
*new_length = newlen;
}
if (should_free) {
STR_FREE(str);
}
return new_str;
}
PHPAPI char *php_addslashes(char *str, int length, int *new_length, int should_free)
{
/* maximum string length, worst case situation */
char *new_str = (char *) emalloc((length?length:(length=strlen(str)))*2+1);
char *source,*target;
char *end;
char c;
PLS_FETCH();
for (source=str,end=source+length,target=new_str; (c = *source) || source<end; source++) {
switch(c) {
case '\0':
*target++ = '\\';
*target++ = '0';
break;
case '\'':
if (PG(magic_quotes_sybase)) {
*target++ = '\'';
*target++ = '\'';
break;
}
/* break is missing *intentionally* */
case '\"':
case '\\':
if (!PG(magic_quotes_sybase)) {
*target++ = '\\';
}
/* break is missing *intentionally* */
default:
*target++ = c;
break;
}
}
*target = 0;
if (new_length) {
*new_length = target - new_str;
}
if (should_free) {
STR_FREE(str);
}
return new_str;
}
#define _HEB_BLOCK_TYPE_ENG 1
#define _HEB_BLOCK_TYPE_HEB 2
#define isheb(c) (((((unsigned char) c)>=224) && (((unsigned char) c)<=250)) ? 1 : 0)
#define _isblank(c) (((((unsigned char) c)==' ' || ((unsigned char) c)=='\t')) ? 1 : 0)
#define _isnewline(c) (((((unsigned char) c)=='\n' || ((unsigned char) c)=='\r')) ? 1 : 0)
PHPAPI void _php3_char_to_str(char *str,uint len,char from,char *to,int to_len,pval *result)
{
int char_count=0;
char *source,*target,*tmp,*source_end=str+len, *tmp_end=NULL;
for (source=str; source<source_end; source++) {
if (*source==from) {
char_count++;
}
}
result->type = IS_STRING;
if (char_count==0) {
result->value.str.val = estrndup(str,len);
result->value.str.len = len;
return;
}
result->value.str.len = len+char_count*(to_len-1);
result->value.str.val = target = (char *) emalloc(result->value.str.len+1);
for (source=str; source<source_end; source++) {
if (*source==from) {
for (tmp=to,tmp_end=tmp+to_len; tmp<tmp_end; tmp++) {
*target = *tmp;
target++;
}
} else {
*target = *source;
target++;
}
}
*target = 0;
}
static inline char *
_php3_memnstr(char *haystack, char *needle, int needle_len, char *end)
{
char *p = haystack;
char *s = NULL;
for(; p <= end - needle_len &&
(s = memchr(p, *needle, end - p - needle_len + 1)); p = s + 1) {
if(memcmp(s, needle, needle_len) == 0)
return s;
}
return NULL;
}
PHPAPI char *_php3_str_to_str(char *haystack, int length,
char *needle, int needle_len, char *str, int str_len, int *_new_length)
{
char *p, *q;
char *r, *s;
char *end = haystack + length;
char *new;
char *off;
new = emalloc(length);
/* we jump through haystack searching for the needle. hurray! */
for(p = haystack, q = new;
(r = _php3_memnstr(p, needle, needle_len, end));) {
/* this ain't optimal. you could call it `efficient memory usage' */
off = erealloc(new, (q - new) + (r - p) + (str_len) + 1);
if(off != new) {
if(!off) {
goto finish;
}
q += off - new;
new = off;
}
memcpy(q, p, r - p);
q += r - p;
memcpy(q, str, str_len);
q += str_len;
p = r + needle_len;
}
/* if there is a rest, copy it */
if((end - p) > 0) {
s = (q) + (end - p);
off = erealloc(new, s - new + 1);
if(off != new) {
if(!off) {
goto finish;
}
q += off - new;
new = off;
s = q + (end - p);
}
memcpy(q, p, end - p);
q = s;
}
finish:
*q = '\0';
if(_new_length) *_new_length = q - new;
return new;
}
/* {{{ proto string str_replace(string needle, string str, string haystack)
Replace all occurrences of needle in haystack with str */
PHP_FUNCTION(str_replace)
{
pval *haystack, *needle, *str;
char *new;
int len = 0;
if(ARG_COUNT(ht) != 3 ||
getParameters(ht, 3, &needle, &str, &haystack) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(haystack);
convert_to_string(needle);
convert_to_string(str);
if(haystack->value.str.len == 0) {
RETURN_STRING(empty_string,1);
}
if(needle->value.str.len == 1) {
_php3_char_to_str(haystack->value.str.val,
haystack->value.str.len,
needle->value.str.val[0],
str->value.str.val,
str->value.str.len,
return_value);
return;
}
if(needle->value.str.len == 0) {
php_error(E_WARNING, "The length of the needle must not be 0");
RETURN_FALSE;
}
new = _php3_str_to_str(haystack->value.str.val, haystack->value.str.len,
needle->value.str.val, needle->value.str.len,
str->value.str.val, str->value.str.len, &len);
RETURN_STRINGL(new, len, 0);
}
/* }}} */
/* Converts Logical Hebrew text (Hebrew Windows style) to Visual text
* Cheers/complaints/flames - Zeev Suraski <zeev@php.net>
*/
static void _php3_hebrev(INTERNAL_FUNCTION_PARAMETERS,int convert_newlines)
{
pval *str,*max_chars_per_line;
char *heb_str,*tmp,*target,*opposite_target,*broken_str;
int block_start, block_end, block_type, block_length, i;
int block_ended;
long max_chars=0;
int begin,end,char_count,orig_begin;
switch(ARG_COUNT(ht)) {
case 1:
if (getParameters(ht, 1, &str)==FAILURE) {
RETURN_FALSE;
}
break;
case 2:
if (getParameters(ht, 2, &str, &max_chars_per_line)==FAILURE) {
RETURN_FALSE;
}
convert_to_long(max_chars_per_line);
max_chars = max_chars_per_line->value.lval;
break;
default:
WRONG_PARAM_COUNT;
break;
}
convert_to_string(str);
if (str->value.str.len==0) {
RETURN_FALSE;
}
tmp = str->value.str.val;
block_start=block_end=0;
block_ended=0;
heb_str = (char *) emalloc(str->value.str.len+1);
target = heb_str+str->value.str.len;
opposite_target = heb_str;
*target = 0;
target--;
block_length=0;
if (isheb(*tmp)) {
block_type = _HEB_BLOCK_TYPE_HEB;
} else {
block_type = _HEB_BLOCK_TYPE_ENG;
}
do {
if (block_type==_HEB_BLOCK_TYPE_HEB) {
while((isheb((int)*(tmp+1)) || _isblank((int)*(tmp+1)) || ispunct((int)*(tmp+1)) || (int)*(tmp+1)=='\n' ) && block_end<str->value.str.len-1) {
tmp++;
block_end++;
block_length++;
}
for (i=block_start; i<=block_end; i++) {
*target = str->value.str.val[i];
switch (*target) {
case '(':
*target = ')';
break;
case ')':
*target = '(';
break;
default:
break;
}
target--;
}
block_type = _HEB_BLOCK_TYPE_ENG;
} else {
while(!isheb(*(tmp+1)) && (int)*(tmp+1)!='\n' && block_end<str->value.str.len-1) {
tmp++;
block_end++;
block_length++;
}
while ((_isblank((int)*tmp) || ispunct((int)*tmp)) && *tmp!='/' && *tmp!='-' && block_end>block_start) {
tmp--;
block_end--;
}
for (i=block_end; i>=block_start; i--) {
*target = str->value.str.val[i];
target--;
}
block_type = _HEB_BLOCK_TYPE_HEB;
}
block_start=block_end+1;
} while(block_end<str->value.str.len-1);
broken_str = (char *) emalloc(str->value.str.len+1);
begin=end=str->value.str.len-1;
target = broken_str;
while (1) {
char_count=0;
while ((!max_chars || char_count<max_chars) && begin>0) {
char_count++;
begin--;
if (begin<=0 || _isnewline(heb_str[begin])) {
while(begin>0 && _isnewline(heb_str[begin-1])) {
begin--;
char_count++;
}
break;
}
}
if (char_count==max_chars) { /* try to avoid breaking words */
int new_char_count=char_count, new_begin=begin;
while (new_char_count>0) {
if (_isblank(heb_str[new_begin]) || _isnewline(heb_str[new_begin])) {
break;
}
new_begin++;
new_char_count--;
}
if (new_char_count>0) {
char_count=new_char_count;
begin=new_begin;
}
}
orig_begin=begin;
if (_isblank(heb_str[begin])) {
heb_str[begin]='\n';
}
while (begin<=end && _isnewline(heb_str[begin])) { /* skip leading newlines */
begin++;
}
for (i=begin; i<=end; i++) { /* copy content */
*target = heb_str[i];
target++;
}
for (i=orig_begin; i<=end && _isnewline(heb_str[i]); i++) {
*target = heb_str[i];
target++;
}
begin=orig_begin;
if (begin<=0) {
*target = 0;
break;
}
begin--;
end=begin;
}
efree(heb_str);
if (convert_newlines) {
_php3_char_to_str(broken_str,str->value.str.len,'\n',"<br>\n",5,return_value);
efree(broken_str);
} else {
return_value->value.str.val = broken_str;
return_value->value.str.len = str->value.str.len;
return_value->type = IS_STRING;
}
}
/* {{{ proto string hebrev(string str [, int max_chars_per_line])
Convert logical Hebrew text to visual text */
PHP_FUNCTION(hebrev)
{
_php3_hebrev(INTERNAL_FUNCTION_PARAM_PASSTHRU,0);
}
/* }}} */
/* {{{ proto string hebrevc(string str [, int max_chars_per_line])
Convert logical Hebrew text to visual text with newline conversion */
PHP_FUNCTION(hebrevc)
{
_php3_hebrev(INTERNAL_FUNCTION_PARAM_PASSTHRU,1);
}
/* }}} */
/* {{{ proto string nl2br(string str)
Converts newlines to HTML line breaks */
PHP_FUNCTION(nl2br)
{
pval *str;
if (ARG_COUNT(ht)!=1 || getParameters(ht, 1, &str)==FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(str);
_php3_char_to_str(str->value.str.val,str->value.str.len,'\n',"<br>\n",5,return_value);
}
/* }}} */
/* {{{ proto string strip_tags(string str [, string allowable_tags])
Strips HTML and PHP tags from a string */
PHP_FUNCTION(strip_tags)
{
char *buf;
pval *str, *allow=NULL;
switch(ARG_COUNT(ht)) {
case 1:
if(getParameters(ht, 1, &str)==FAILURE) {
RETURN_FALSE;
}
break;
case 2:
if(getParameters(ht, 2, &str, &allow)==FAILURE) {
RETURN_FALSE;
}
convert_to_string(allow);
break;
default:
WRONG_PARAM_COUNT;
break;
}
convert_to_string(str);
buf = estrdup(str->value.str.val);
_php3_strip_tags(buf, str->value.str.len, 0, allow->value.str.val);
RETURN_STRING(buf, 0);
}
/* }}} */
/* {{{ proto string setlocale(string category, string locale)
Set locale information */
PHP_FUNCTION(setlocale)
{
pval *category, *locale;
int cat;
char *loc, *retval;
if (ARG_COUNT(ht)!=2 || getParameters(ht, 2, &category, &locale)==FAILURE)
WRONG_PARAM_COUNT;
#ifdef HAVE_SETLOCALE
convert_to_string(category);
convert_to_string(locale);
if (!strcasecmp ("LC_ALL", category->value.str.val))
cat = LC_ALL;
else if (!strcasecmp ("LC_COLLATE", category->value.str.val))
cat = LC_COLLATE;
else if (!strcasecmp ("LC_CTYPE", category->value.str.val))
cat = LC_CTYPE;
else if (!strcasecmp ("LC_MONETARY", category->value.str.val))
cat = LC_MONETARY;
else if (!strcasecmp ("LC_NUMERIC", category->value.str.val))
cat = LC_NUMERIC;
else if (!strcasecmp ("LC_TIME", category->value.str.val))
cat = LC_TIME;
else {
php_error(E_WARNING,"Invalid locale category name %s, must be one of LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY, LC_NUMERIC or LC_TIME", category->value.str.val);
RETURN_FALSE;
}
if (!strcmp ("0", locale->value.str.val))
loc = NULL;
else
loc = locale->value.str.val;
retval = setlocale (cat, loc);
if (retval) {
RETVAL_STRING(retval,1);
return;
}
#endif
RETURN_FALSE;
}
/* }}} */
/* {{{ proto void parse_str(string encoded_string)
Parses GET/POST/COOKIE data and sets global variables. */
PHP_FUNCTION(parse_str)
{
pval *arg;
char *res = NULL;
ELS_FETCH();
PLS_FETCH();
SLS_FETCH();
if (getParameters(ht, 1, &arg) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(arg);
if (arg->value.str.val && *arg->value.str.val) {
res = estrndup(arg->value.str.val,arg->value.str.len);
}
php_treat_data(PARSE_STRING, res ELS_CC PLS_CC SLS_CC);
}
/* }}} */
#define PHP_TAG_BUF_SIZE 1023
/* Check if tag is in a set of tags
*
* states:
*
* 0 start tag
* 1 first non-whitespace char seen
*/
int php_tag_find(char *tag, int len, char *set) {
char c, *n, *t;
int i=0, state=0, done=0;
char *norm = emalloc(len);
n = norm;
t = tag;
c = tolower(*t);
/*
normalize the tag removing leading and trailing whitespace
and turn any <a whatever...> into just <a> and any </tag>
into <tag>
*/
while(i<len && !done) {
switch(c) {
case '<':
*(n++) = c;
break;
case '>':
done =1;
break;
default:
if(!isspace(c)) {
if(state==0) {
state=1;
if(c!='/') *(n++) = c;
} else {
*(n++) = c;
}
} else {
if(state==1) done=1;
}
break;
}
c = tolower(*(++t));
}
*(n++) = '>';
*n = '\0';
if(strstr(set,norm)) done=1;
else done=0;
efree(norm);
return done;
}
/* A simple little state-machine to strip out html and php tags
State 0 is the output state, State 1 means we are inside a
normal html tag and state 2 means we are inside a php tag.
The state variable is passed in to allow a function like fgetss
to maintain state across calls to the function.
lc holds the last significant character read and br is a bracket
counter.
When an allow string is passed in we keep track of the string
in state 1 and when the tag is closed check it against the
allow string to see if we should allow it.
*/
void _php3_strip_tags(char *rbuf, int len, int state, char *allow) {
char *tbuf, *buf, *p, *tp, *rp, c, lc;
int br, i=0;
buf = estrdup(rbuf);
c = *buf;
lc = '\0';
p = buf;
rp = rbuf;
br = 0;
if(allow) {
_php3_strtolower(allow);
tbuf = emalloc(PHP_TAG_BUF_SIZE+1);
tp = tbuf;
} else tp=NULL;
while(i<len) {
switch (c) {
case '<':
if (state == 0) {
lc = '<';
state = 1;
if(allow) {
*(tp++) = '<';
}
}
break;
case '(':
if (state == 2) {
if (lc != '\"') {
lc = '(';
br++;
}
} else if (state == 0) {
*(rp++) = c;
}
break;
case ')':
if (state == 2) {
if (lc != '\"') {
lc = ')';
br--;
}
} else if (state == 0) {
*(rp++) = c;
}
break;
case '>':
if (state == 1) {
lc = '>';
state = 0;
if(allow) {
*(tp++) = '>';
*tp='\0';
if(php_tag_find(tbuf, tp-tbuf, allow)) {
memcpy(rp,tbuf,tp-tbuf);
rp += tp-tbuf;
}
tp = tbuf;
}
} else if (state == 2) {
if (!br && lc != '\"' && *(p-1)=='?') {
state = 0;
}
}
break;
case '\"':
if (state == 2) {
if (lc == '\"') {
lc = '\0';
} else if (lc != '\\') {
lc = '\"';
}
} else if (state == 0) {
*(rp++) = c;
} else if (allow && state == 1) {
*(tp++) = c;
}
break;
case '?':
if (state==1 && *(p-1)=='<') {
br=0;
state=2;
break;
}
/* fall-through */
default:
if (state == 0) {
*(rp++) = c;
} else if(allow && state == 1) {
*(tp++) = c;
if( (tp-tbuf)>=PHP_TAG_BUF_SIZE ) { /* no buffer overflows */
tp = tbuf;
}
}
break;
}
c = *(++p);
i++;
}
*rp = '\0';
efree(buf);
if(allow) efree(tbuf);
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/
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