xref: /PHP-5.3/ext/standard/incomplete_class.c (revision a2045ff3)
1 /*
2    +----------------------------------------------------------------------+
3    | PHP Version 5                                                        |
4    +----------------------------------------------------------------------+
5    | Copyright (c) 1997-2013 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    | Author:  Sascha Schumann <sascha@schumann.cx>                        |
16    +----------------------------------------------------------------------+
17 */
18 
19 /* $Id$ */
20 
21 #include "php.h"
22 #include "basic_functions.h"
23 #include "php_incomplete_class.h"
24 
25 #define INCOMPLETE_CLASS_MSG \
26 		"The script tried to execute a method or "  \
27 		"access a property of an incomplete object. " \
28 		"Please ensure that the class definition \"%s\" of the object " \
29 		"you are trying to operate on was loaded _before_ " \
30 		"unserialize() gets called or provide a __autoload() function " \
31 		"to load the class definition "
32 
33 static zend_object_handlers php_incomplete_object_handlers;
34 
35 /* {{{ incomplete_class_message
36  */
incomplete_class_message(zval * object,int error_type TSRMLS_DC)37 static void incomplete_class_message(zval *object, int error_type TSRMLS_DC)
38 {
39 	char *class_name;
40 	zend_bool class_name_alloced = 1;
41 
42 	class_name = php_lookup_class_name(object, NULL);
43 
44 	if (!class_name) {
45 		class_name_alloced = 0;
46 		class_name = "unknown";
47 	}
48 
49 	php_error_docref(NULL TSRMLS_CC, error_type, INCOMPLETE_CLASS_MSG, class_name);
50 
51 	if (class_name_alloced) {
52 		efree(class_name);
53 	}
54 }
55 /* }}} */
56 
incomplete_class_get_property(zval * object,zval * member,int type TSRMLS_DC)57 static zval *incomplete_class_get_property(zval *object, zval *member, int type TSRMLS_DC) /* {{{ */
58 {
59 	incomplete_class_message(object, E_NOTICE TSRMLS_CC);
60 
61 	if (type == BP_VAR_W || type == BP_VAR_RW) {
62 		return EG(error_zval_ptr);
63 	} else {
64 		return EG(uninitialized_zval_ptr);
65 	}
66 }
67 /* }}} */
68 
incomplete_class_write_property(zval * object,zval * member,zval * value TSRMLS_DC)69 static void incomplete_class_write_property(zval *object, zval *member, zval *value TSRMLS_DC) /* {{{ */
70 {
71 	incomplete_class_message(object, E_NOTICE TSRMLS_CC);
72 }
73 /* }}} */
74 
incomplete_class_get_property_ptr_ptr(zval * object,zval * member TSRMLS_DC)75 static zval **incomplete_class_get_property_ptr_ptr(zval *object, zval *member TSRMLS_DC) /* {{{ */
76 {
77 	incomplete_class_message(object, E_NOTICE TSRMLS_CC);
78 	return &EG(error_zval_ptr);
79 }
80 /* }}} */
81 
incomplete_class_unset_property(zval * object,zval * member TSRMLS_DC)82 static void incomplete_class_unset_property(zval *object, zval *member TSRMLS_DC) /* {{{ */
83 {
84 	incomplete_class_message(object, E_NOTICE TSRMLS_CC);
85 }
86 /* }}} */
87 
incomplete_class_has_property(zval * object,zval * member,int check_empty TSRMLS_DC)88 static int incomplete_class_has_property(zval *object, zval *member, int check_empty TSRMLS_DC) /* {{{ */
89 {
90 	incomplete_class_message(object, E_NOTICE TSRMLS_CC);
91 	return 0;
92 }
93 /* }}} */
94 
incomplete_class_get_method(zval ** object,char * method,int method_len TSRMLS_DC)95 static union _zend_function *incomplete_class_get_method(zval **object, char *method, int method_len TSRMLS_DC) /* {{{ */
96 {
97 	incomplete_class_message(*object, E_ERROR TSRMLS_CC);
98 	return NULL;
99 }
100 /* }}} */
101 
102 /* {{{ php_create_incomplete_class
103  */
php_create_incomplete_object(zend_class_entry * class_type TSRMLS_DC)104 static zend_object_value php_create_incomplete_object(zend_class_entry *class_type TSRMLS_DC)
105 {
106 	zend_object *object;
107 	zend_object_value value;
108 
109 	value = zend_objects_new(&object, class_type TSRMLS_CC);
110 	value.handlers = &php_incomplete_object_handlers;
111 
112 	ALLOC_HASHTABLE(object->properties);
113 	zend_hash_init(object->properties, 0, NULL, ZVAL_PTR_DTOR, 0);
114 	return value;
115 }
116 
php_create_incomplete_class(TSRMLS_D)117 PHPAPI zend_class_entry *php_create_incomplete_class(TSRMLS_D)
118 {
119 	zend_class_entry incomplete_class;
120 
121 	INIT_CLASS_ENTRY(incomplete_class, INCOMPLETE_CLASS, NULL);
122 	incomplete_class.create_object = php_create_incomplete_object;
123 
124 	memcpy(&php_incomplete_object_handlers, &std_object_handlers, sizeof(zend_object_handlers));
125 	php_incomplete_object_handlers.read_property = incomplete_class_get_property;
126 	php_incomplete_object_handlers.has_property = incomplete_class_has_property;
127 	php_incomplete_object_handlers.unset_property = incomplete_class_unset_property;
128 	php_incomplete_object_handlers.write_property = incomplete_class_write_property;
129 	php_incomplete_object_handlers.get_property_ptr_ptr = incomplete_class_get_property_ptr_ptr;
130     php_incomplete_object_handlers.get_method = incomplete_class_get_method;
131 
132 	return zend_register_internal_class(&incomplete_class TSRMLS_CC);
133 }
134 /* }}} */
135 
136 /* {{{ php_lookup_class_name
137  */
php_lookup_class_name(zval * object,zend_uint * nlen)138 PHPAPI char *php_lookup_class_name(zval *object, zend_uint *nlen)
139 {
140 	zval **val;
141 	char *retval = NULL;
142 	HashTable *object_properties;
143 	TSRMLS_FETCH();
144 
145 	object_properties = Z_OBJPROP_P(object);
146 
147 	if (zend_hash_find(object_properties, MAGIC_MEMBER, sizeof(MAGIC_MEMBER), (void **) &val) == SUCCESS) {
148 		retval = estrndup(Z_STRVAL_PP(val), Z_STRLEN_PP(val));
149 
150 		if (nlen) {
151 			*nlen = Z_STRLEN_PP(val);
152 		}
153 	}
154 
155 	return retval;
156 }
157 /* }}} */
158 
159 /* {{{ php_store_class_name
160  */
php_store_class_name(zval * object,const char * name,zend_uint len)161 PHPAPI void php_store_class_name(zval *object, const char *name, zend_uint len)
162 {
163 	zval *val;
164 	TSRMLS_FETCH();
165 
166 	MAKE_STD_ZVAL(val);
167 
168 	Z_TYPE_P(val)   = IS_STRING;
169 	Z_STRVAL_P(val) = estrndup(name, len);
170 	Z_STRLEN_P(val) = len;
171 
172 	zend_hash_update(Z_OBJPROP_P(object), MAGIC_MEMBER, sizeof(MAGIC_MEMBER), &val, sizeof(val), NULL);
173 }
174 /* }}} */
175 
176 /*
177  * Local variables:
178  * tab-width: 4
179  * c-basic-offset: 4
180  * End:
181  * vim600: sw=4 ts=4 fdm=marker
182  * vim<600: sw=4 ts=4
183  */
184