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|
/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2003 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.0 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_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: Marcus Boerger <helly@php.net> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "zend_compile.h"
#include "zend_execute_locks.h"
#include "php_spl.h"
#include "spl_functions.h"
#include "spl_engine.h"
#include "spl_foreach.h"
#define OPTIMIZED_ARRAY_CONSTRUCT
typedef struct {
zend_function *next;
zend_function *rewind;
zend_function *more;
zend_function *current;
zend_function *key;
} spl_foreach_funcs;
typedef struct {
zval *obj;
zend_class_entry *obj_ce;
zend_uint index;
spl_is_a is_a;
spl_foreach_funcs funcs;
char dummy; /* needed for '\0' but we can't set it due to compiler optimizations */
} spl_foreach_proxy;
/* {{{ ZEND_EXECUTE_HOOK_FUNCTION(ZEND_FE_RESET) */
ZEND_EXECUTE_HOOK_FUNCTION(ZEND_FE_RESET)
{
zval **obj, *retval;
spl_foreach_proxy *proxy;
zend_class_entry *instance_ce, *obj_ce;
spl_is_a is_a;
temp_variable *tmp;
obj = spl_get_zval_ptr_ptr(&EX(opline)->op1, EX(Ts) TSRMLS_CC);
if (!obj || (instance_ce = spl_get_class_entry(*obj TSRMLS_CC)) == NULL) {
ZEND_EXECUTE_HOOK_ORIGINAL(ZEND_FE_RESET);
}
is_a = spl_implements(instance_ce);
if (is_a & SPL_IS_A_ITERATOR) {
spl_unlock_zval_ptr_ptr(&EX(opline)->op1, EX(Ts) TSRMLS_CC);
obj_ce = instance_ce;
spl_begin_method_call_ex(obj, obj_ce, NULL, "new_iterator", sizeof("new_iterator")-1, &retval);
instance_ce = spl_get_class_entry(retval TSRMLS_CC);
is_a = spl_implements(instance_ce);
if (!(is_a & SPL_IS_A_FORWARD)) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Objects created by %s::new_iterator() must implement spl_forward", obj_ce->name);
ZEND_EXECUTE_HOOK_ORIGINAL(ZEND_FE_RESET);
}
PZVAL_LOCK(retval);
} else if (is_a & SPL_IS_A_FORWARD) {
spl_unlock_zval_ptr_ptr(&EX(opline)->op1, EX(Ts) TSRMLS_CC);
retval = *obj;
retval->refcount += 2; /* lock two times */
} else {
ZEND_EXECUTE_HOOK_ORIGINAL(ZEND_FE_RESET);
}
/* create the proxy */
proxy = emalloc(sizeof(spl_foreach_proxy));
proxy->obj = retval;
proxy->obj_ce = instance_ce;
proxy->index = 0;
proxy->is_a = is_a;
memset(&proxy->funcs, 0, sizeof(spl_foreach_funcs));
((char*)proxy)[sizeof(spl_foreach_proxy)-1] = '\0';
/* And pack it into a zval. Since it is nowhere accessible using a
* zval of type STRING is the fastest approach of storing the proxy.
*/
ALLOC_ZVAL(retval);
ZVAL_STRINGL(retval, (char*)proxy, sizeof(spl_foreach_proxy)-1, 0);
retval->is_ref = 0;
retval->refcount = 2; /* lock two times */
/* return the created proxy container */
tmp = &EX_T(EX(opline)->result.u.var);
tmp->var.ptr = retval;
tmp->var.ptr_ptr = &tmp->var.ptr;
NEXT_OPCODE();
}
/* }}} */
/* {{{ OPTIMIZED_ARRAY_CONSTRUCT macros */
#ifdef OPTIMIZED_ARRAY_CONSTRUCT
#define CONNECT_TO_BUCKET_DLLIST(element, list_head) \
(element)->pNext = (list_head); \
(element)->pLast = NULL;
#define CONNECT_TO_GLOBAL_DLLIST(element, ht) \
(element)->pListLast = (ht)->pListTail; \
(ht)->pListTail = (element); \
(element)->pListNext = NULL; \
if ((element)->pListLast != NULL) { \
(element)->pListLast->pListNext = (element); \
} \
if (!(ht)->pListHead) { \
(ht)->pListHead = (element); \
} \
if ((ht)->pInternalPointer == NULL) { \
(ht)->pInternalPointer = (element); \
}
#endif
/* }}} */
/* {{{ ZEND_EXECUTE_HOOK_FUNCTION(ZEND_FE_FETCH) */
ZEND_EXECUTE_HOOK_FUNCTION(ZEND_FE_FETCH)
{
znode *op1 = &EX(opline)->op1;
zval **obj = spl_get_zval_ptr_ptr(op1, EX(Ts) TSRMLS_CC);
zval *more, *value, *key, *result;
spl_foreach_proxy *proxy;
if (Z_TYPE_PP(obj) == IS_STRING) {
proxy = (spl_foreach_proxy*)Z_STRVAL_PP(obj);
obj = &proxy->obj; /* will be optimized out */
if (proxy->index++) {
spl_begin_method_call_no_retval(obj, proxy->obj_ce, &proxy->funcs.next, "next", sizeof("next")-1 TSRMLS_CC);
} else {
if (proxy->is_a & SPL_IS_A_SEQUENCE) {
spl_begin_method_call_no_retval(obj, proxy->obj_ce, &proxy->funcs.rewind, "rewind", sizeof("rewind")-1 TSRMLS_CC);
}
/* now this is an optimization trick:
ZEND_SWITCH_FREE receives the array copy or the spl object in op1 and has an unused op2
We have to check for op1 being an object that implements spl_forwar... Or we simply set
op2 and know we can safely free the object as needed, which is waht we do. */
op_array->opcodes[EX(opline)->op2.u.opline_num].op2 = *op1;
}
spl_begin_method_call_ex(obj, proxy->obj_ce, &proxy->funcs.more, "has_more", sizeof("has_more")-1, &more);
if (!more->type == IS_BOOL && !more->type == IS_LONG) {
php_error_docref(NULL TSRMLS_CC, E_NOTICE, "Method %s::has_more implements spl_forward::has_more and should return a value of type boolean or int");
convert_to_boolean(more);
}
if (more->value.lval) {
zval_dtor(more);
FREE_ZVAL(more);
result = &EX_T(EX(opline)->result.u.var).tmp_var;
spl_begin_method_call_ex(obj, proxy->obj_ce, &proxy->funcs.current, "current", sizeof("current")-1, &value);
if (proxy->is_a & SPL_IS_A_ASSOC) {
spl_begin_method_call_ex(obj, proxy->obj_ce, &proxy->funcs.key, "key", sizeof("key")-1, &key);
} else {
MAKE_STD_ZVAL(key);
key->value.lval = proxy->index;
key->type = IS_LONG;
}
#ifndef OPTIMIZED_ARRAY_CONSTRUCT
array_init(result);
add_next_index_zval(result, value);
add_next_index_zval(result, key);
#else
{
Bucket *p;
HashTable *ht;
ht = emalloc(sizeof(HashTable));
result->value.ht = ht;
ht->nTableSize = 1 << 1;
ht->nTableMask = ht->nTableSize - 1;
#if ZEND_DEBUG
ht->inconsistent = 0; /*HT_OK;*/
#endif
ht->arBuckets = (Bucket **)emalloc(ht->nTableSize * sizeof(Bucket *));
ht->pDestructor = ZVAL_PTR_DTOR;
ht->pListHead = NULL;
ht->pListTail = NULL;
ht->nNumOfElements = 0;
ht->nNextFreeElement = 0;
ht->pInternalPointer = NULL;
ht->persistent = 0;
ht->nApplyCount = 0;
ht->bApplyProtection = 1;
result->type = IS_ARRAY;
p = (Bucket*)emalloc(sizeof(Bucket)-1);
p->pDataPtr = value;
p->pData = &p->pDataPtr;
p->nKeyLength = 0;
p->h = 0;
result->value.ht->arBuckets[0] = p;
CONNECT_TO_BUCKET_DLLIST(p, ht->arBuckets[0]);
CONNECT_TO_GLOBAL_DLLIST(p, ht);
p = (Bucket*)emalloc(sizeof(Bucket)-1);
p->pDataPtr = key;
p->pData = &p->pDataPtr;
p->nKeyLength = 0;
p->h = 1;
result->value.ht->arBuckets[1] = p;
CONNECT_TO_BUCKET_DLLIST(p, ht->arBuckets[1]);
CONNECT_TO_GLOBAL_DLLIST(p, ht);
ht->nNumOfElements = 2;
}
#endif
NEXT_OPCODE();
}
zval_dtor(more);
FREE_ZVAL(more);
EX(opline) = op_array->opcodes+EX(opline)->op2.u.opline_num;
return 0;
}
ZEND_EXECUTE_HOOK_ORIGINAL(ZEND_FE_FETCH);
}
/* }}} */
/* {{{ ZEND_EXECUTE_HOOK_FUNCTION(ZEND_SWITCH_FREE) */
ZEND_EXECUTE_HOOK_FUNCTION(ZEND_SWITCH_FREE)
{
/* See not in ZEND_FE_FETCH on setting op2 */
znode *op2 = &EX(opline)->op2;
zval *tmp, **obj = spl_get_zval_ptr_ptr(op2, EX(Ts) TSRMLS_CC);
spl_foreach_proxy *proxy;
if (obj) {
proxy = (spl_foreach_proxy*)Z_STRVAL_PP(obj);
tmp = *obj;
*obj = proxy->obj; /* restore */
efree(tmp->value.str.val);
FREE_ZVAL(tmp);
spl_unlock_zval_ptr_ptr(&EX(opline)->op1, EX(Ts) TSRMLS_CC);
PZVAL_LOCK(*obj);
SET_UNUSED(*op2);
}
ZEND_EXECUTE_HOOK_ORIGINAL(ZEND_SWITCH_FREE);
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: fdm=marker
* vim: noet sw=4 ts=4
*/
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