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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998, 1999 Andi Gutmans, Zeev Suraski |
+----------------------------------------------------------------------+
| This source file is subject to the Zend license, that is bundled |
| with this package in the file LICENSE. If you did not receive a |
| copy of the Zend license, please mail us at zend@zend.com so we can |
| send you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
#include <stdio.h>
#include "zend.h"
#include "zend_API.h"
#include "zend_globals.h"
#include "zend_constants.h"
#include "zend_variables.h"
#include "zend_list.h"
ZEND_API char *empty_string = ""; /* in order to save emalloc() and efree() time for
* empty strings (usually used to denote empty
* return values in failed functions).
* The macro STR_FREE() will not efree() it.
*/
ZEND_API char *undefined_variable_string = "\0";
/* this function MUST set the value for the variable to an empty string */
/* and empty strings must be evaluated as FALSE */
ZEND_API inline void var_reset(zval *var)
{
var->type = IS_STRING;
var->value.str.val = empty_string;
var->value.str.len = 0;
}
ZEND_API inline void var_uninit(zval *var)
{
var->type = IS_STRING;
var->value.str.val = undefined_variable_string;
var->value.str.len = 0;
}
ZEND_API int zval_dtor(zval *zvalue)
{
if (zvalue->type==IS_LONG) {
return;
}
switch(zvalue->type) {
case IS_STRING:
case IS_CONSTANT:
STR_FREE(zvalue->value.str.val);
break;
case IS_ARRAY: {
ELS_FETCH();
if (zvalue->value.ht && (zvalue->value.ht != &EG(symbol_table))) {
if (EG(AiCount)==0) {
zend_hash_destroy(zvalue->value.ht);
efree(zvalue->value.ht);
} else {
zend_ptr_stack_push(&EG(garbage), zvalue->value.ht);
}
}
}
break;
case IS_OBJECT: {
ELS_FETCH();
if (EG(AiCount)==0) {
zend_hash_destroy(zvalue->value.obj.properties);
efree(zvalue->value.obj.properties);
} else {
zend_ptr_stack_push(&EG(garbage), zvalue->value.obj.properties);
}
}
break;
case IS_RESOURCE:
/* destroy resource */
zend_list_delete(zvalue->value.lval);
break;
case IS_LONG:
case IS_DOUBLE:
case IS_BOOL:
default:
return;
break;
}
}
void zval_add_ref(zval **p)
{
(*p)->refcount++;
}
ZEND_API int zval_copy_ctor(zval *zvalue)
{
switch (zvalue->type) {
case IS_RESOURCE:
zend_list_addref(zvalue->value.lval);
break;
case IS_BOOL:
case IS_LONG:
break;
case IS_STRING:
if (zvalue->value.str.val) {
if (zvalue->value.str.len==0) {
if (zvalue->value.str.val==undefined_variable_string) {
zvalue->value.str.val = undefined_variable_string;
} else {
zvalue->value.str.val = empty_string;
}
return SUCCESS;
}
}
zvalue->value.str.val = (char *) estrndup(zvalue->value.str.val, zvalue->value.str.len);
break;
case IS_ARRAY: {
zval *tmp;
HashTable *original_ht = zvalue->value.ht;
ELS_FETCH();
if (!zvalue->value.ht || zvalue->value.ht==&EG(symbol_table)) {
var_reset(zvalue);
return FAILURE;
}
zvalue->value.ht = (HashTable *) emalloc(sizeof(HashTable));
zend_hash_init(zvalue->value.ht, 0, NULL, PVAL_PTR_DTOR, 0);
zend_hash_copy(zvalue->value.ht, original_ht, (void (*)(void *)) zval_add_ref, (void *) &tmp, sizeof(zval *));
}
break;
case IS_OBJECT: {
zval *tmp;
HashTable *original_ht = zvalue->value.obj.properties;
zvalue->value.obj.properties = (HashTable *) emalloc(sizeof(HashTable));
zend_hash_init(zvalue->value.obj.properties, 0, NULL, PVAL_PTR_DTOR, 0);
zend_hash_copy(zvalue->value.obj.properties, original_ht, (void (*)(void *)) zval_add_ref, (void *) &tmp, sizeof(zval *));
}
break;
}
return SUCCESS;
}
ZEND_API int zend_print_variable(zval *var)
{
return zend_print_zval(var, 0);
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/
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