1 /* 2 +----------------------------------------------------------------------+ 3 | Zend Engine | 4 +----------------------------------------------------------------------+ 5 | Copyright (c) Zend Technologies Ltd. (http://www.zend.com) | 6 +----------------------------------------------------------------------+ 7 | This source file is subject to version 2.00 of the Zend license, | 8 | that is bundled with this package in the file LICENSE, and is | 9 | available through the world-wide-web at the following url: | 10 | http://www.zend.com/license/2_00.txt. | 11 | If you did not receive a copy of the Zend license and are unable to | 12 | obtain it through the world-wide-web, please send a note to | 13 | license@zend.com so we can mail you a copy immediately. | 14 +----------------------------------------------------------------------+ 15 | Author: Wez Furlong <wez@thebrainroom.com> | 16 | Marcus Boerger <helly@php.net> | 17 +----------------------------------------------------------------------+ 18 */ 19 20 /* These iterators were designed to operate within the foreach() 21 * structures provided by the engine, but could be extended for use 22 * with other iterative engine opcodes. 23 * These methods have similar semantics to the zend_hash API functions 24 * with similar names. 25 * */ 26 27 typedef struct _zend_object_iterator zend_object_iterator; 28 29 typedef struct _zend_object_iterator_funcs { 30 /* release all resources associated with this iterator instance */ 31 void (*dtor)(zend_object_iterator *iter); 32 33 /* check for end of iteration (FAILURE or SUCCESS if data is valid) */ 34 int (*valid)(zend_object_iterator *iter); 35 36 /* fetch the item data for the current element */ 37 zval *(*get_current_data)(zend_object_iterator *iter); 38 39 /* fetch the key for the current element (optional, may be NULL). The key 40 * should be written into the provided zval* using the ZVAL_* macros. If 41 * this handler is not provided auto-incrementing integer keys will be 42 * used. */ 43 void (*get_current_key)(zend_object_iterator *iter, zval *key); 44 45 /* step forwards to next element */ 46 void (*move_forward)(zend_object_iterator *iter); 47 48 /* rewind to start of data (optional, may be NULL) */ 49 void (*rewind)(zend_object_iterator *iter); 50 51 /* invalidate current value/key (optional, may be NULL) */ 52 void (*invalidate_current)(zend_object_iterator *iter); 53 } zend_object_iterator_funcs; 54 55 struct _zend_object_iterator { 56 zend_object std; 57 zval data; 58 const zend_object_iterator_funcs *funcs; 59 zend_ulong index; /* private to fe_reset/fe_fetch opcodes */ 60 }; 61 62 typedef struct _zend_class_iterator_funcs { 63 zend_function *zf_new_iterator; 64 zend_function *zf_valid; 65 zend_function *zf_current; 66 zend_function *zf_key; 67 zend_function *zf_next; 68 zend_function *zf_rewind; 69 } zend_class_iterator_funcs; 70 71 BEGIN_EXTERN_C() 72 /* given a zval, returns stuff that can be used to iterate it. */ 73 ZEND_API zend_object_iterator* zend_iterator_unwrap(zval *array_ptr); 74 75 /* given an iterator, wrap it up as a zval for use by the engine opcodes */ 76 ZEND_API void zend_iterator_init(zend_object_iterator *iter); 77 ZEND_API void zend_iterator_dtor(zend_object_iterator *iter); 78 79 ZEND_API void zend_register_iterator_wrapper(void); 80 END_EXTERN_C() 81
