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php-src/main/php_variables.c

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/*
+----------------------------------------------------------------------+
| PHP Version 4 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2002 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 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_02.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> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include <stdio.h>
#include "php.h"
#include "ext/standard/php_standard.h"
#include "php_variables.h"
#include "php_globals.h"
#include "php_content_types.h"
#include "SAPI.h"
#include "zend_globals.h"
/* for systems that need to override reading of environment variables */
void _php_import_environment_variables(zval *array_ptr TSRMLS_DC);
PHPAPI void (*php_import_environment_variables)(zval *array_ptr TSRMLS_DC) = _php_import_environment_variables;
PHPAPI void php_register_variable(char *var, char *strval, zval *track_vars_array TSRMLS_DC)
{
php_register_variable_safe(var, strval, strlen(strval), track_vars_array TSRMLS_CC);
}
/* binary-safe version */
PHPAPI void php_register_variable_safe(char *var, char *strval, int str_len, zval *track_vars_array TSRMLS_DC)
{
zval new_entry;
assert(strval != NULL);
/* Prepare value */
Z_STRLEN(new_entry) = str_len;
if (PG(magic_quotes_gpc)) {
Z_STRVAL(new_entry) = php_addslashes(strval, Z_STRLEN(new_entry), &Z_STRLEN(new_entry), 0 TSRMLS_CC);
} else {
Z_STRVAL(new_entry) = estrndup(strval, Z_STRLEN(new_entry));
}
Z_TYPE(new_entry) = IS_STRING;
php_register_variable_ex(var, &new_entry, track_vars_array TSRMLS_CC);
}
PHPAPI void php_register_variable_ex(char *var, zval *val, pval *track_vars_array TSRMLS_DC)
{
char *p = NULL;
char *ip; /* index pointer */
char *index;
int var_len, index_len;
zval *gpc_element, **gpc_element_p, **top_gpc_p=NULL;
zend_bool is_array;
HashTable *symtable1=NULL;
HashTable *symtable2=NULL;
assert(var != NULL);
if (PG(register_globals)) {
symtable1 = EG(active_symbol_table);
}
if (track_vars_array) {
if (symtable1) {
symtable2 = Z_ARRVAL_P(track_vars_array);
} else {
symtable1 = Z_ARRVAL_P(track_vars_array);
}
}
if (!symtable1) {
/* Nothing to do */
zval_dtor(val);
return;
}
/*
* Prepare variable name
*/
ip = strchr(var, '[');
if (ip) {
is_array = 1;
*ip = 0;
} else {
is_array = 0;
}
/* ignore leading spaces in the variable name */
while (*var && *var==' ') {
var++;
}
var_len = strlen(var);
if (var_len==0) { /* empty variable name, or variable name with a space in it */
zval_dtor(val);
return;
}
/* ensure that we don't have spaces or dots in the variable name (not binary safe) */
for (p=var; *p; p++) {
switch(*p) {
case ' ':
case '.':
*p='_';
break;
}
}
index = var;
index_len = var_len;
while (1) {
if (is_array) {
char *escaped_index;
if (!index) {
MAKE_STD_ZVAL(gpc_element);
array_init(gpc_element);
zend_hash_next_index_insert(symtable1, &gpc_element, sizeof(zval *), (void **) &gpc_element_p);
} else {
if (PG(magic_quotes_gpc) && (index!=var)) {
/* no need to addslashes() the index if it's the main variable name */
escaped_index = php_addslashes(index, index_len, &index_len, 0 TSRMLS_CC);
} else {
escaped_index = index;
}
if (zend_hash_find(symtable1, escaped_index, index_len+1, (void **) &gpc_element_p)==FAILURE
|| Z_TYPE_PP(gpc_element_p) != IS_ARRAY) {
MAKE_STD_ZVAL(gpc_element);
array_init(gpc_element);
zend_hash_update(symtable1, escaped_index, index_len+1, &gpc_element, sizeof(zval *), (void **) &gpc_element_p);
}
if (index!=escaped_index) {
efree(escaped_index);
}
}
if (!top_gpc_p) {
top_gpc_p = gpc_element_p;
}
symtable1 = Z_ARRVAL_PP(gpc_element_p);
/* ip pointed to the '[' character, now obtain the key */
index = ++ip;
index_len = 0;
if (*ip=='\n' || *ip=='\r' || *ip=='\t' || *ip==' ') {
ip++;
}
if (*ip==']') {
index = NULL;
} else {
ip = strchr(ip, ']');
if (!ip) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Missing ] in %s variable", var);
return;
}
*ip = 0;
index_len = strlen(index);
}
ip++;
if (*ip=='[') {
is_array = 1;
*ip = 0;
} else {
is_array = 0;
}
} else {
MAKE_STD_ZVAL(gpc_element);
gpc_element->value = val->value;
Z_TYPE_P(gpc_element) = Z_TYPE_P(val);
if (!index) {
zend_hash_next_index_insert(symtable1, &gpc_element, sizeof(zval *), (void **) &gpc_element_p);
} else {
zend_hash_update(symtable1, index, index_len+1, &gpc_element, sizeof(zval *), (void **) &gpc_element_p);
}
if (!top_gpc_p) {
top_gpc_p = gpc_element_p;
}
break;
}
}
if (top_gpc_p) {
if (symtable2) {
zend_hash_update(symtable2, var, var_len+1, top_gpc_p, sizeof(zval *), NULL);
(*top_gpc_p)->refcount++;
}
}
}
SAPI_API SAPI_POST_HANDLER_FUNC(php_std_post_handler)
{
char *var, *val;
char *strtok_buf = NULL;
zval *array_ptr = (zval *) arg;
if (SG(request_info).post_data==NULL) {
return;
}
var = php_strtok_r(SG(request_info).post_data, "&", &strtok_buf);
while (var) {
val = strchr(var, '=');
if (val) { /* have a value */
int val_len;
*val++ = '\0';
php_url_decode(var, strlen(var));
val_len = php_url_decode(val, strlen(val));
php_register_variable_safe(var, val, val_len, array_ptr TSRMLS_CC);
}
var = php_strtok_r(NULL, "&", &strtok_buf);
}
}
SAPI_API SAPI_TREAT_DATA_FUNC(php_default_treat_data)
{
char *res = NULL, *var, *val, *separator=NULL;
const char *c_var;
pval *array_ptr;
int free_buffer=0;
char *strtok_buf = NULL;
switch (arg) {
case PARSE_POST:
case PARSE_GET:
case PARSE_COOKIE:
ALLOC_ZVAL(array_ptr);
array_init(array_ptr);
INIT_PZVAL(array_ptr);
switch (arg) {
case PARSE_POST:
PG(http_globals)[TRACK_VARS_POST] = array_ptr;
break;
case PARSE_GET:
PG(http_globals)[TRACK_VARS_GET] = array_ptr;
break;
case PARSE_COOKIE:
PG(http_globals)[TRACK_VARS_COOKIE] = array_ptr;
break;
}
break;
default:
array_ptr=destArray;
break;
}
if (arg==PARSE_POST) {
sapi_handle_post(array_ptr TSRMLS_CC);
return;
}
if (arg == PARSE_GET) { /* GET data */
c_var = SG(request_info).query_string;
if (c_var && *c_var) {
res = (char *) estrdup(c_var);
free_buffer = 1;
} else {
free_buffer = 0;
}
} else if (arg == PARSE_COOKIE) { /* Cookie data */
c_var = SG(request_info).cookie_data;
if (c_var && *c_var) {
res = (char *) estrdup(c_var);
free_buffer = 1;
} else {
free_buffer = 0;
}
} else if (arg == PARSE_STRING) { /* String data */
res = str;
free_buffer = 1;
}
if (!res) {
return;
}
switch (arg) {
case PARSE_GET:
case PARSE_STRING:
separator = (char *) estrdup(PG(arg_separator).input);
break;
case PARSE_COOKIE:
separator = ";\0";
break;
}
var = php_strtok_r(res, separator, &strtok_buf);
while (var) {
val = strchr(var, '=');
if (val) { /* have a value */
int val_len;
*val++ = '\0';
php_url_decode(var, strlen(var));
val_len = php_url_decode(val, strlen(val));
php_register_variable_safe(var, val, val_len, array_ptr TSRMLS_CC);
} else {
php_url_decode(var, strlen(var));
php_register_variable_safe(var, "", 0, array_ptr TSRMLS_CC);
}
var = php_strtok_r(NULL, separator, &strtok_buf);
}
if(arg != PARSE_COOKIE) {
efree(separator);
}
if (free_buffer) {
efree(res);
}
}
void _php_import_environment_variables(zval *array_ptr TSRMLS_DC)
{
char **env, *p, *t;
for (env = environ; env != NULL && *env != NULL; env++) {
p = strchr(*env, '=');
if (!p) { /* malformed entry? */
continue;
}
t = estrndup(*env, p - *env);
php_register_variable(t, p+1, array_ptr TSRMLS_CC);
efree(t);
}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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