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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2009 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend 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.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Wez Furlong <wez@thebrainroom.com> |
| Marcus Boerger <helly@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id: zend_iterators.h 272370 2008-12-31 11:15:49Z sebastian $ */
/* These iterators were designed to operate within the foreach()
* structures provided by the engine, but could be extended for use
* with other iterative engine opcodes.
* These methods have similar semantics to the zend_hash API functions
* with similar names.
* */
typedef struct _zend_object_iterator zend_object_iterator;
typedef struct _zend_object_iterator_funcs {
/* release all resources associated with this iterator instance */
void (*dtor)(zend_object_iterator *iter TSRMLS_DC);
/* check for end of iteration (FAILURE or SUCCESS if data is valid) */
int (*valid)(zend_object_iterator *iter TSRMLS_DC);
/* fetch the item data for the current element */
void (*get_current_data)(zend_object_iterator *iter, zval ***data TSRMLS_DC);
/* fetch the key for the current element (return HASH_KEY_IS_STRING or HASH_KEY_IS_LONG) (optional, may be NULL) */
int (*get_current_key)(zend_object_iterator *iter, char **str_key, uint *str_key_len, ulong *int_key TSRMLS_DC);
/* step forwards to next element */
void (*move_forward)(zend_object_iterator *iter TSRMLS_DC);
/* rewind to start of data (optional, may be NULL) */
void (*rewind)(zend_object_iterator *iter TSRMLS_DC);
/* invalidate current value/key (optional, may be NULL) */
void (*invalidate_current)(zend_object_iterator *iter TSRMLS_DC);
} zend_object_iterator_funcs;
struct _zend_object_iterator {
void *data;
zend_object_iterator_funcs *funcs;
ulong index; /* private to fe_reset/fe_fetch opcodes */
};
typedef struct _zend_class_iterator_funcs {
zend_object_iterator_funcs *funcs;
union _zend_function *zf_new_iterator;
union _zend_function *zf_valid;
union _zend_function *zf_current;
union _zend_function *zf_key;
union _zend_function *zf_next;
union _zend_function *zf_rewind;
} zend_class_iterator_funcs;
enum zend_object_iterator_kind {
ZEND_ITER_INVALID,
ZEND_ITER_PLAIN_ARRAY,
ZEND_ITER_PLAIN_OBJECT,
ZEND_ITER_OBJECT
};
BEGIN_EXTERN_C()
/* given a zval, returns stuff that can be used to iterate it. */
ZEND_API enum zend_object_iterator_kind zend_iterator_unwrap(zval *array_ptr, zend_object_iterator **iter TSRMLS_DC);
/* given an iterator, wrap it up as a zval for use by the engine opcodes */
ZEND_API zval *zend_iterator_wrap(zend_object_iterator *iter TSRMLS_DC);
ZEND_API void zend_register_iterator_wrapper(TSRMLS_D);
END_EXTERN_C()
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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