1 /*
2   +----------------------------------------------------------------------+
3   | PHP Version 7                                                        |
4   +----------------------------------------------------------------------+
5   | Copyright (c) 1997-2018 The PHP Group                                |
6   +----------------------------------------------------------------------+
7   | This source file is subject to version 3.01 of the PHP 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.php.net/license/3_01.txt                                  |
11   | If you did not receive a copy of the PHP license and are unable to   |
12   | obtain it through the world-wide-web, please send a note to          |
13   | license@php.net so we can mail you a copy immediately.               |
14   +----------------------------------------------------------------------+
15   | Authors: Georg Richter <georg@php.net>                               |
16   |          Andrey Hristov <andrey@php.net>                             |
17   |          Ulf Wendel <uw@php.net>                                     |
18   +----------------------------------------------------------------------+
19 
20   $Id: mysqli.c 299335 2010-05-13 11:05:09Z andrey $
21 */
22 
23 #ifdef HAVE_CONFIG_H
24 #include "config.h"
25 #endif
26 
27 #include <signal.h>
28 
29 #include "php.h"
30 #include "php_ini.h"
31 #include "php_mysqli_structs.h"
32 #include "mysqli_priv.h"
33 #include "zend_interfaces.h"
34 
35 
36 extern zend_object_iterator_funcs php_mysqli_result_iterator_funcs;
37 
38 typedef struct {
39 	zend_object_iterator  intern;
40 	mysqli_object *result;
41 	zval current_row;
42 	my_longlong row_num;
43 } php_mysqli_result_iterator;
44 
45 
46 /* {{{ */
php_mysqli_result_get_iterator(zend_class_entry * ce,zval * object,int by_ref)47 zend_object_iterator *php_mysqli_result_get_iterator(zend_class_entry *ce, zval *object, int by_ref)
48 {
49 	php_mysqli_result_iterator *iterator;
50 
51 	if (by_ref) {
52 		zend_error(E_ERROR, "An iterator cannot be used with foreach by reference");
53 	}
54 	iterator = ecalloc(1, sizeof(php_mysqli_result_iterator));
55 	zend_iterator_init(&iterator->intern);
56 
57 	ZVAL_COPY(&iterator->intern.data, object);
58 	iterator->intern.funcs = &php_mysqli_result_iterator_funcs;
59 	iterator->result = Z_MYSQLI_P(object);
60 	iterator->row_num = -1;
61 
62 	return &iterator->intern;
63 }
64 /* }}} */
65 
66 /* {{{ */
php_mysqli_result_iterator_dtor(zend_object_iterator * iter)67 static void php_mysqli_result_iterator_dtor(zend_object_iterator *iter)
68 {
69 	php_mysqli_result_iterator *iterator = (php_mysqli_result_iterator*)iter;
70 
71 	/* cleanup handled in sxe_object_dtor as we dont always have an iterator wrapper */
72 	zval_ptr_dtor(&iterator->intern.data);
73 	zval_ptr_dtor(&iterator->current_row);
74 }
75 /* }}} */
76 
77 /* {{{ */
php_mysqli_result_iterator_valid(zend_object_iterator * iter)78 static int php_mysqli_result_iterator_valid(zend_object_iterator *iter)
79 {
80 	php_mysqli_result_iterator *iterator = (php_mysqli_result_iterator*) iter;
81 
82 	return Z_TYPE(iterator->current_row) == IS_ARRAY ? SUCCESS : FAILURE;
83 }
84 /* }}} */
85 
86 /* {{{ */
php_mysqli_result_iterator_current_data(zend_object_iterator * iter)87 static zval *php_mysqli_result_iterator_current_data(zend_object_iterator *iter)
88 {
89 	php_mysqli_result_iterator *iterator = (php_mysqli_result_iterator*) iter;
90 
91 	return &iterator->current_row;
92 }
93 /* }}} */
94 
95 /* {{{ */
php_mysqli_result_iterator_move_forward(zend_object_iterator * iter)96 static void php_mysqli_result_iterator_move_forward(zend_object_iterator *iter)
97 {
98 
99 	php_mysqli_result_iterator *iterator = (php_mysqli_result_iterator*) iter;
100 	mysqli_object *intern = iterator->result;
101 	MYSQL_RES	*result;
102 
103 	MYSQLI_FETCH_RESOURCE_BY_OBJ(result, MYSQL_RES *, intern, "mysqli_result", MYSQLI_STATUS_VALID);
104 
105 	zval_ptr_dtor(&iterator->current_row);
106 	php_mysqli_fetch_into_hash_aux(&iterator->current_row, result, MYSQLI_ASSOC);
107 	if (Z_TYPE(iterator->current_row) == IS_ARRAY) {
108 		iterator->row_num++;
109 	}
110 }
111 /* }}} */
112 
113 /* {{{ */
php_mysqli_result_iterator_rewind(zend_object_iterator * iter)114 static void php_mysqli_result_iterator_rewind(zend_object_iterator *iter)
115 {
116 	php_mysqli_result_iterator *iterator = (php_mysqli_result_iterator*) iter;
117 	mysqli_object *intern = iterator->result;
118 	MYSQL_RES	*result;
119 
120 	MYSQLI_FETCH_RESOURCE_BY_OBJ(result, MYSQL_RES *, intern, "mysqli_result", MYSQLI_STATUS_VALID);
121 
122 	if (mysqli_result_is_unbuffered(result)) {
123 #if MYSQLI_USE_MYSQLND
124 		if (result->unbuf->eof_reached) {
125 #else
126 		if (result->eof) {
127 #endif
128 			php_error_docref(NULL, E_WARNING, "Data fetched with MYSQLI_USE_RESULT can be iterated only once");
129 			return;
130 		}
131 	} else {
132 		mysql_data_seek(result, 0);
133 	}
134 	iterator->row_num = -1;
135 	php_mysqli_result_iterator_move_forward(iter);
136 }
137 /* }}} */
138 
139 /* {{{ php_mysqli_result_iterator_current_key */
140 static void php_mysqli_result_iterator_current_key(zend_object_iterator *iter, zval *key)
141 {
142 	php_mysqli_result_iterator *iterator = (php_mysqli_result_iterator*) iter;
143 
144 	ZVAL_LONG(key, iterator->row_num);
145 }
146 /* }}} */
147 
148 /* {{{ php_mysqli_result_iterator_funcs */
149 zend_object_iterator_funcs php_mysqli_result_iterator_funcs = {
150 	php_mysqli_result_iterator_dtor,
151 	php_mysqli_result_iterator_valid,
152 	php_mysqli_result_iterator_current_data,
153 	php_mysqli_result_iterator_current_key,
154 	php_mysqli_result_iterator_move_forward,
155 	php_mysqli_result_iterator_rewind,
156 	NULL
157 };
158 /* }}} */
159 
160 /*
161  * Local variables:
162  * tab-width: 4
163  * c-basic-offset: 4
164  * End:
165  * vim600: noet sw=4 ts=4 fdm=marker
166  * vim<600: noet sw=4 ts=4
167  */
168