forked from php/php-src
/
zend_builtin_functions.c
2422 lines (2110 loc) · 66.4 KB
/
zend_builtin_functions.c
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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 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. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@php.net> |
| Zeev Suraski <zeev@php.net> |
+----------------------------------------------------------------------+
*/
#include "zend.h"
#include "zend_API.h"
#include "zend_gc.h"
#include "zend_builtin_functions.h"
#include "zend_constants.h"
#include "zend_ini.h"
#include "zend_exceptions.h"
#include "zend_extensions.h"
#include "zend_closures.h"
#include "zend_generators.h"
static ZEND_FUNCTION(zend_version);
static ZEND_FUNCTION(func_num_args);
static ZEND_FUNCTION(func_get_arg);
static ZEND_FUNCTION(func_get_args);
static ZEND_FUNCTION(strlen);
static ZEND_FUNCTION(strcmp);
static ZEND_FUNCTION(strncmp);
static ZEND_FUNCTION(strcasecmp);
static ZEND_FUNCTION(strncasecmp);
static ZEND_FUNCTION(error_reporting);
static ZEND_FUNCTION(define);
static ZEND_FUNCTION(defined);
static ZEND_FUNCTION(get_class);
static ZEND_FUNCTION(get_called_class);
static ZEND_FUNCTION(get_parent_class);
static ZEND_FUNCTION(method_exists);
static ZEND_FUNCTION(property_exists);
static ZEND_FUNCTION(property_initialized);
static ZEND_FUNCTION(class_exists);
static ZEND_FUNCTION(interface_exists);
static ZEND_FUNCTION(trait_exists);
static ZEND_FUNCTION(function_exists);
static ZEND_FUNCTION(class_alias);
static ZEND_FUNCTION(get_included_files);
static ZEND_FUNCTION(is_subclass_of);
static ZEND_FUNCTION(is_a);
static ZEND_FUNCTION(get_class_vars);
static ZEND_FUNCTION(get_object_vars);
static ZEND_FUNCTION(get_mangled_object_vars);
static ZEND_FUNCTION(get_class_methods);
static ZEND_FUNCTION(trigger_error);
static ZEND_FUNCTION(set_error_handler);
static ZEND_FUNCTION(restore_error_handler);
static ZEND_FUNCTION(set_exception_handler);
static ZEND_FUNCTION(restore_exception_handler);
static ZEND_FUNCTION(get_declared_classes);
static ZEND_FUNCTION(get_declared_traits);
static ZEND_FUNCTION(get_declared_interfaces);
static ZEND_FUNCTION(get_defined_functions);
static ZEND_FUNCTION(get_defined_vars);
static ZEND_FUNCTION(get_resource_type);
static ZEND_FUNCTION(get_resources);
static ZEND_FUNCTION(get_loaded_extensions);
static ZEND_FUNCTION(extension_loaded);
static ZEND_FUNCTION(get_extension_funcs);
static ZEND_FUNCTION(get_defined_constants);
static ZEND_FUNCTION(debug_backtrace);
static ZEND_FUNCTION(debug_print_backtrace);
#if ZEND_DEBUG && defined(ZTS)
static ZEND_FUNCTION(zend_thread_id);
#endif
static ZEND_FUNCTION(gc_mem_caches);
static ZEND_FUNCTION(gc_collect_cycles);
static ZEND_FUNCTION(gc_enabled);
static ZEND_FUNCTION(gc_enable);
static ZEND_FUNCTION(gc_disable);
static ZEND_FUNCTION(gc_status);
#include "zend_builtin_functions_arginfo.h"
/* }}} */
static const zend_function_entry builtin_functions[] = { /* {{{ */
ZEND_FE(zend_version, arginfo_zend_version)
ZEND_FE(func_num_args, arginfo_func_num_args)
ZEND_FE(func_get_arg, arginfo_func_get_arg)
ZEND_FE(func_get_args, arginfo_func_get_args)
ZEND_FE(strlen, arginfo_strlen)
ZEND_FE(strcmp, arginfo_strcmp)
ZEND_FE(strncmp, arginfo_strncmp)
ZEND_FE(strcasecmp, arginfo_strcmp)
ZEND_FE(strncasecmp, arginfo_strncmp)
ZEND_FE(error_reporting, arginfo_error_reporting)
ZEND_FE(define, arginfo_define)
ZEND_FE(defined, arginfo_defined)
ZEND_FE(get_class, arginfo_get_class)
ZEND_FE(get_called_class, arginfo_get_called_class)
ZEND_FE(get_parent_class, arginfo_get_parent_class)
ZEND_FE(method_exists, arginfo_method_exists)
ZEND_FE(property_exists, arginfo_property_exists)
ZEND_FE(property_initialized, arginfo_property_exists)
ZEND_FE(class_exists, arginfo_class_exists)
ZEND_FE(interface_exists, arginfo_interface_exists)
ZEND_FE(trait_exists, arginfo_trait_exists)
ZEND_FE(function_exists, arginfo_function_exists)
ZEND_FE(class_alias, arginfo_class_alias)
ZEND_FE(get_included_files, arginfo_get_included_files)
ZEND_FALIAS(get_required_files, get_included_files, arginfo_get_required_files)
ZEND_FE(is_subclass_of, arginfo_is_subclass_of)
ZEND_FE(is_a, arginfo_is_a)
ZEND_FE(get_class_vars, arginfo_get_class_vars)
ZEND_FE(get_object_vars, arginfo_get_object_vars)
ZEND_FE(get_mangled_object_vars, arginfo_get_mangled_object_vars)
ZEND_FE(get_class_methods, arginfo_get_class_methods)
ZEND_FE(trigger_error, arginfo_trigger_error)
ZEND_FALIAS(user_error, trigger_error, arginfo_user_error)
ZEND_FE(set_error_handler, arginfo_set_error_handler)
ZEND_FE(restore_error_handler, arginfo_restore_error_handler)
ZEND_FE(set_exception_handler, arginfo_set_exception_handler)
ZEND_FE(restore_exception_handler, arginfo_restore_exception_handler)
ZEND_FE(get_declared_classes, arginfo_get_declared_classes)
ZEND_FE(get_declared_traits, arginfo_get_declared_traits)
ZEND_FE(get_declared_interfaces, arginfo_get_declared_interfaces)
ZEND_FE(get_defined_functions, arginfo_get_defined_functions)
ZEND_FE(get_defined_vars, arginfo_get_defined_vars)
ZEND_FE(get_resource_type, arginfo_get_resource_type)
ZEND_FE(get_resources, arginfo_get_resources)
ZEND_FE(get_loaded_extensions, arginfo_get_loaded_extensions)
ZEND_FE(extension_loaded, arginfo_extension_loaded)
ZEND_FE(get_extension_funcs, arginfo_get_extension_funcs)
ZEND_FE(get_defined_constants, arginfo_get_defined_constants)
ZEND_FE(debug_backtrace, arginfo_debug_backtrace)
ZEND_FE(debug_print_backtrace, arginfo_debug_print_backtrace)
#if ZEND_DEBUG && defined(ZTS)
ZEND_FE(zend_thread_id, arginfo_zend_thread_id)
#endif
ZEND_FE(gc_mem_caches, arginfo_gc_mem_caches)
ZEND_FE(gc_collect_cycles, arginfo_gc_collect_cycles)
ZEND_FE(gc_enabled, arginfo_gc_enabled)
ZEND_FE(gc_enable, arginfo_gc_enable)
ZEND_FE(gc_disable, arginfo_gc_disable)
ZEND_FE(gc_status, arginfo_gc_status)
ZEND_FE_END
};
/* }}} */
ZEND_MINIT_FUNCTION(core) { /* {{{ */
zend_class_entry class_entry;
INIT_CLASS_ENTRY(class_entry, "stdClass", NULL);
zend_standard_class_def = zend_register_internal_class(&class_entry);
zend_register_default_classes();
return SUCCESS;
}
/* }}} */
zend_module_entry zend_builtin_module = { /* {{{ */
STANDARD_MODULE_HEADER,
"Core",
builtin_functions,
ZEND_MINIT(core),
NULL,
NULL,
NULL,
NULL,
ZEND_VERSION,
STANDARD_MODULE_PROPERTIES
};
/* }}} */
int zend_startup_builtin_functions(void) /* {{{ */
{
zend_builtin_module.module_number = 0;
zend_builtin_module.type = MODULE_PERSISTENT;
return (EG(current_module) = zend_register_module_ex(&zend_builtin_module)) == NULL ? FAILURE : SUCCESS;
}
/* }}} */
/* {{{ proto string zend_version(void)
Get the version of the Zend Engine */
ZEND_FUNCTION(zend_version)
{
ZEND_PARSE_PARAMETERS_NONE();
RETURN_STRINGL(ZEND_VERSION, sizeof(ZEND_VERSION)-1);
}
/* }}} */
/* {{{ proto int gc_mem_caches(void)
Reclaims memory used by MM caches.
Returns number of freed bytes */
ZEND_FUNCTION(gc_mem_caches)
{
ZEND_PARSE_PARAMETERS_NONE();
RETURN_LONG(zend_mm_gc(zend_mm_get_heap()));
}
/* }}} */
/* {{{ proto int gc_collect_cycles(void)
Forces collection of any existing garbage cycles.
Returns number of freed zvals */
ZEND_FUNCTION(gc_collect_cycles)
{
ZEND_PARSE_PARAMETERS_NONE();
RETURN_LONG(gc_collect_cycles());
}
/* }}} */
/* {{{ proto void gc_enabled(void)
Returns status of the circular reference collector */
ZEND_FUNCTION(gc_enabled)
{
ZEND_PARSE_PARAMETERS_NONE();
RETURN_BOOL(gc_enabled());
}
/* }}} */
/* {{{ proto void gc_enable(void)
Activates the circular reference collector */
ZEND_FUNCTION(gc_enable)
{
zend_string *key;
ZEND_PARSE_PARAMETERS_NONE();
key = zend_string_init("zend.enable_gc", sizeof("zend.enable_gc")-1, 0);
zend_alter_ini_entry_chars(key, "1", sizeof("1")-1, ZEND_INI_USER, ZEND_INI_STAGE_RUNTIME);
zend_string_release_ex(key, 0);
}
/* }}} */
/* {{{ proto void gc_disable(void)
Deactivates the circular reference collector */
ZEND_FUNCTION(gc_disable)
{
zend_string *key;
ZEND_PARSE_PARAMETERS_NONE();
key = zend_string_init("zend.enable_gc", sizeof("zend.enable_gc")-1, 0);
zend_alter_ini_entry_chars(key, "0", sizeof("0")-1, ZEND_INI_USER, ZEND_INI_STAGE_RUNTIME);
zend_string_release_ex(key, 0);
}
/* }}} */
/* {{{ proto array gc_status(void)
Returns current GC statistics */
ZEND_FUNCTION(gc_status)
{
zend_gc_status status;
ZEND_PARSE_PARAMETERS_NONE();
zend_gc_get_status(&status);
array_init_size(return_value, 3);
add_assoc_long_ex(return_value, "runs", sizeof("runs")-1, (long)status.runs);
add_assoc_long_ex(return_value, "collected", sizeof("collected")-1, (long)status.collected);
add_assoc_long_ex(return_value, "threshold", sizeof("threshold")-1, (long)status.threshold);
add_assoc_long_ex(return_value, "roots", sizeof("roots")-1, (long)status.num_roots);
}
/* }}} */
/* {{{ proto int func_num_args(void)
Get the number of arguments that were passed to the function */
ZEND_FUNCTION(func_num_args)
{
zend_execute_data *ex = EX(prev_execute_data);
ZEND_PARSE_PARAMETERS_NONE();
if (ZEND_CALL_INFO(ex) & ZEND_CALL_CODE) {
zend_error(E_WARNING, "func_num_args(): Called from the global scope - no function context");
RETURN_LONG(-1);
}
if (zend_forbid_dynamic_call("func_num_args()") == FAILURE) {
RETURN_LONG(-1);
}
RETURN_LONG(ZEND_CALL_NUM_ARGS(ex));
}
/* }}} */
/* {{{ proto mixed func_get_arg(int arg_num)
Get the $arg_num'th argument that was passed to the function */
ZEND_FUNCTION(func_get_arg)
{
uint32_t arg_count, first_extra_arg;
zval *arg;
zend_long requested_offset;
zend_execute_data *ex;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &requested_offset) == FAILURE) {
RETURN_THROWS();
}
if (requested_offset < 0) {
zend_error(E_WARNING, "func_get_arg(): The argument number should be >= 0");
RETURN_FALSE;
}
ex = EX(prev_execute_data);
if (ZEND_CALL_INFO(ex) & ZEND_CALL_CODE) {
zend_error(E_WARNING, "func_get_arg(): Called from the global scope - no function context");
RETURN_FALSE;
}
if (zend_forbid_dynamic_call("func_get_arg()") == FAILURE) {
RETURN_FALSE;
}
arg_count = ZEND_CALL_NUM_ARGS(ex);
if ((zend_ulong)requested_offset >= arg_count) {
zend_error(E_WARNING, "func_get_arg(): Argument " ZEND_LONG_FMT " not passed to function", requested_offset);
RETURN_FALSE;
}
first_extra_arg = ex->func->op_array.num_args;
if ((zend_ulong)requested_offset >= first_extra_arg && (ZEND_CALL_NUM_ARGS(ex) > first_extra_arg)) {
arg = ZEND_CALL_VAR_NUM(ex, ex->func->op_array.last_var + ex->func->op_array.T) + (requested_offset - first_extra_arg);
} else {
arg = ZEND_CALL_ARG(ex, requested_offset + 1);
}
if (EXPECTED(!Z_ISUNDEF_P(arg))) {
ZVAL_COPY_DEREF(return_value, arg);
}
}
/* }}} */
/* {{{ proto array func_get_args()
Get an array of the arguments that were passed to the function */
ZEND_FUNCTION(func_get_args)
{
zval *p, *q;
uint32_t arg_count, first_extra_arg;
uint32_t i;
zend_execute_data *ex = EX(prev_execute_data);
if (ZEND_CALL_INFO(ex) & ZEND_CALL_CODE) {
zend_error(E_WARNING, "func_get_args(): Called from the global scope - no function context");
RETURN_FALSE;
}
if (zend_forbid_dynamic_call("func_get_args()") == FAILURE) {
RETURN_FALSE;
}
arg_count = ZEND_CALL_NUM_ARGS(ex);
if (arg_count) {
array_init_size(return_value, arg_count);
first_extra_arg = ex->func->op_array.num_args;
zend_hash_real_init_packed(Z_ARRVAL_P(return_value));
ZEND_HASH_FILL_PACKED(Z_ARRVAL_P(return_value)) {
i = 0;
p = ZEND_CALL_ARG(ex, 1);
if (arg_count > first_extra_arg) {
while (i < first_extra_arg) {
q = p;
if (EXPECTED(Z_TYPE_INFO_P(q) != IS_UNDEF)) {
ZVAL_DEREF(q);
if (Z_OPT_REFCOUNTED_P(q)) {
Z_ADDREF_P(q);
}
ZEND_HASH_FILL_SET(q);
} else {
ZEND_HASH_FILL_SET_NULL();
}
ZEND_HASH_FILL_NEXT();
p++;
i++;
}
p = ZEND_CALL_VAR_NUM(ex, ex->func->op_array.last_var + ex->func->op_array.T);
}
while (i < arg_count) {
q = p;
if (EXPECTED(Z_TYPE_INFO_P(q) != IS_UNDEF)) {
ZVAL_DEREF(q);
if (Z_OPT_REFCOUNTED_P(q)) {
Z_ADDREF_P(q);
}
ZEND_HASH_FILL_SET(q);
} else {
ZEND_HASH_FILL_SET_NULL();
}
ZEND_HASH_FILL_NEXT();
p++;
i++;
}
} ZEND_HASH_FILL_END();
Z_ARRVAL_P(return_value)->nNumOfElements = arg_count;
} else {
RETURN_EMPTY_ARRAY();
}
}
/* }}} */
/* {{{ proto int strlen(string str)
Get string length
Warning: This function is special-cased by zend_compile.c and so is usually bypassed */
ZEND_FUNCTION(strlen)
{
zend_string *s;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_STR(s)
ZEND_PARSE_PARAMETERS_END();
RETVAL_LONG(ZSTR_LEN(s));
}
/* }}} */
/* {{{ proto int strcmp(string str1, string str2)
Binary safe string comparison */
ZEND_FUNCTION(strcmp)
{
zend_string *s1, *s2;
ZEND_PARSE_PARAMETERS_START(2, 2)
Z_PARAM_STR(s1)
Z_PARAM_STR(s2)
ZEND_PARSE_PARAMETERS_END();
RETURN_LONG(zend_binary_strcmp(ZSTR_VAL(s1), ZSTR_LEN(s1), ZSTR_VAL(s2), ZSTR_LEN(s2)));
}
/* }}} */
/* {{{ proto int strncmp(string str1, string str2, int len)
Binary safe string comparison */
ZEND_FUNCTION(strncmp)
{
zend_string *s1, *s2;
zend_long len;
ZEND_PARSE_PARAMETERS_START(3, 3)
Z_PARAM_STR(s1)
Z_PARAM_STR(s2)
Z_PARAM_LONG(len)
ZEND_PARSE_PARAMETERS_END();
if (len < 0) {
zend_error(E_WARNING, "Length must be greater than or equal to 0");
RETURN_FALSE;
}
RETURN_LONG(zend_binary_strncmp(ZSTR_VAL(s1), ZSTR_LEN(s1), ZSTR_VAL(s2), ZSTR_LEN(s2), len));
}
/* }}} */
/* {{{ proto int strcasecmp(string str1, string str2)
Binary safe case-insensitive string comparison */
ZEND_FUNCTION(strcasecmp)
{
zend_string *s1, *s2;
ZEND_PARSE_PARAMETERS_START(2, 2)
Z_PARAM_STR(s1)
Z_PARAM_STR(s2)
ZEND_PARSE_PARAMETERS_END();
RETURN_LONG(zend_binary_strcasecmp(ZSTR_VAL(s1), ZSTR_LEN(s1), ZSTR_VAL(s2), ZSTR_LEN(s2)));
}
/* }}} */
/* {{{ proto int strncasecmp(string str1, string str2, int len)
Binary safe string comparison */
ZEND_FUNCTION(strncasecmp)
{
zend_string *s1, *s2;
zend_long len;
ZEND_PARSE_PARAMETERS_START(3, 3)
Z_PARAM_STR(s1)
Z_PARAM_STR(s2)
Z_PARAM_LONG(len)
ZEND_PARSE_PARAMETERS_END();
if (len < 0) {
zend_error(E_WARNING, "Length must be greater than or equal to 0");
RETURN_FALSE;
}
RETURN_LONG(zend_binary_strncasecmp(ZSTR_VAL(s1), ZSTR_LEN(s1), ZSTR_VAL(s2), ZSTR_LEN(s2), len));
}
/* }}} */
/* {{{ proto int error_reporting([int new_error_level])
Return the current error_reporting level, and if an argument was passed - change to the new level */
ZEND_FUNCTION(error_reporting)
{
zval *err = NULL;
int old_error_reporting;
ZEND_PARSE_PARAMETERS_START(0, 1)
Z_PARAM_OPTIONAL
Z_PARAM_ZVAL(err)
ZEND_PARSE_PARAMETERS_END();
old_error_reporting = EG(error_reporting);
if (ZEND_NUM_ARGS() != 0) {
zend_string *new_val = zval_try_get_string(err);
if (UNEXPECTED(!new_val)) {
return;
}
do {
zend_ini_entry *p = EG(error_reporting_ini_entry);
if (!p) {
zval *zv = zend_hash_find_ex(EG(ini_directives), ZSTR_KNOWN(ZEND_STR_ERROR_REPORTING), 1);
if (zv) {
p = EG(error_reporting_ini_entry) = (zend_ini_entry*)Z_PTR_P(zv);
} else {
break;
}
}
if (!p->modified) {
if (!EG(modified_ini_directives)) {
ALLOC_HASHTABLE(EG(modified_ini_directives));
zend_hash_init(EG(modified_ini_directives), 8, NULL, NULL, 0);
}
if (EXPECTED(zend_hash_add_ptr(EG(modified_ini_directives), ZSTR_KNOWN(ZEND_STR_ERROR_REPORTING), p) != NULL)) {
p->orig_value = p->value;
p->orig_modifiable = p->modifiable;
p->modified = 1;
}
} else if (p->orig_value != p->value) {
zend_string_release_ex(p->value, 0);
}
p->value = new_val;
if (Z_TYPE_P(err) == IS_LONG) {
EG(error_reporting) = Z_LVAL_P(err);
} else {
EG(error_reporting) = atoi(ZSTR_VAL(p->value));
}
} while (0);
}
RETVAL_LONG(old_error_reporting);
}
/* }}} */
static int validate_constant_array(HashTable *ht) /* {{{ */
{
int ret = 1;
zval *val;
GC_PROTECT_RECURSION(ht);
ZEND_HASH_FOREACH_VAL_IND(ht, val) {
ZVAL_DEREF(val);
if (Z_REFCOUNTED_P(val)) {
if (Z_TYPE_P(val) == IS_ARRAY) {
if (Z_REFCOUNTED_P(val)) {
if (Z_IS_RECURSIVE_P(val)) {
zend_error(E_WARNING, "Constants cannot be recursive arrays");
ret = 0;
break;
} else if (!validate_constant_array(Z_ARRVAL_P(val))) {
ret = 0;
break;
}
}
} else if (Z_TYPE_P(val) != IS_STRING && Z_TYPE_P(val) != IS_RESOURCE) {
zend_error(E_WARNING, "Constants may only evaluate to scalar values, arrays or resources");
ret = 0;
break;
}
}
} ZEND_HASH_FOREACH_END();
GC_UNPROTECT_RECURSION(ht);
return ret;
}
/* }}} */
static void copy_constant_array(zval *dst, zval *src) /* {{{ */
{
zend_string *key;
zend_ulong idx;
zval *new_val, *val;
array_init_size(dst, zend_hash_num_elements(Z_ARRVAL_P(src)));
ZEND_HASH_FOREACH_KEY_VAL_IND(Z_ARRVAL_P(src), idx, key, val) {
/* constant arrays can't contain references */
ZVAL_DEREF(val);
if (key) {
new_val = zend_hash_add_new(Z_ARRVAL_P(dst), key, val);
} else {
new_val = zend_hash_index_add_new(Z_ARRVAL_P(dst), idx, val);
}
if (Z_TYPE_P(val) == IS_ARRAY) {
if (Z_REFCOUNTED_P(val)) {
copy_constant_array(new_val, val);
}
} else {
Z_TRY_ADDREF_P(val);
}
} ZEND_HASH_FOREACH_END();
}
/* }}} */
/* {{{ proto bool define(string constant_name, mixed value[, bool case_insensitive])
Define a new constant */
ZEND_FUNCTION(define)
{
zend_string *name;
zval *val, val_free;
zend_bool non_cs = 0;
zend_constant c;
ZEND_PARSE_PARAMETERS_START(2, 3)
Z_PARAM_STR(name)
Z_PARAM_ZVAL(val)
Z_PARAM_OPTIONAL
Z_PARAM_BOOL(non_cs)
ZEND_PARSE_PARAMETERS_END();
if (zend_memnstr(ZSTR_VAL(name), "::", sizeof("::") - 1, ZSTR_VAL(name) + ZSTR_LEN(name))) {
zend_error(E_WARNING, "Class constants cannot be defined or redefined");
RETURN_FALSE;
}
if (non_cs) {
zend_error(E_WARNING,
"define(): Declaration of case-insensitive constants is no longer supported");
RETURN_FALSE;
}
ZVAL_UNDEF(&val_free);
switch (Z_TYPE_P(val)) {
case IS_LONG:
case IS_DOUBLE:
case IS_STRING:
case IS_FALSE:
case IS_TRUE:
case IS_NULL:
case IS_RESOURCE:
break;
case IS_ARRAY:
if (Z_REFCOUNTED_P(val)) {
if (!validate_constant_array(Z_ARRVAL_P(val))) {
RETURN_FALSE;
} else {
copy_constant_array(&c.value, val);
goto register_constant;
}
}
break;
case IS_OBJECT:
if (Z_OBJ_HT_P(val)->cast_object) {
if (Z_OBJ_HT_P(val)->cast_object(Z_OBJ_P(val), &val_free, IS_STRING) == SUCCESS) {
val = &val_free;
break;
}
}
/* no break */
default:
zend_error(E_WARNING, "Constants may only evaluate to scalar values, arrays or resources");
zval_ptr_dtor(&val_free);
RETURN_FALSE;
}
ZVAL_COPY(&c.value, val);
zval_ptr_dtor(&val_free);
register_constant:
/* non persistent */
ZEND_CONSTANT_SET_FLAGS(&c, CONST_CS, PHP_USER_CONSTANT);
c.name = zend_string_copy(name);
if (zend_register_constant(&c) == SUCCESS) {
RETURN_TRUE;
} else {
RETURN_FALSE;
}
}
/* }}} */
/* {{{ proto bool defined(string constant_name)
Check whether a constant exists
Warning: This function is special-cased by zend_compile.c and so is usually bypassed */
ZEND_FUNCTION(defined)
{
zend_string *name;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_STR(name)
ZEND_PARSE_PARAMETERS_END();
if (zend_get_constant_ex(name, zend_get_executed_scope(), ZEND_FETCH_CLASS_SILENT)) {
RETURN_TRUE;
} else {
RETURN_FALSE;
}
}
/* }}} */
/* {{{ proto string get_class([object object])
Retrieves the class name */
ZEND_FUNCTION(get_class)
{
zval *obj = NULL;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "|o", &obj) == FAILURE) {
RETURN_THROWS();
}
if (!obj) {
zend_class_entry *scope = zend_get_executed_scope();
if (scope) {
RETURN_STR_COPY(scope->name);
} else {
zend_error(E_WARNING, "get_class() called without object from outside a class");
RETURN_FALSE;
}
}
RETURN_STR_COPY(Z_OBJCE_P(obj)->name);
}
/* }}} */
/* {{{ proto string get_called_class()
Retrieves the "Late Static Binding" class name */
ZEND_FUNCTION(get_called_class)
{
zend_class_entry *called_scope;
ZEND_PARSE_PARAMETERS_NONE();
called_scope = zend_get_called_scope(execute_data);
if (called_scope) {
RETURN_STR_COPY(called_scope->name);
} else {
zend_class_entry *scope = zend_get_executed_scope();
if (!scope) {
zend_error(E_WARNING, "get_called_class() called from outside a class");
}
}
RETURN_FALSE;
}
/* }}} */
/* {{{ proto mixed get_parent_class([mixed object])
Retrieves the parent class name for object or class or current scope or false if not in a scope. */
ZEND_FUNCTION(get_parent_class)
{
zval *arg;
zend_class_entry *ce = NULL;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "|z", &arg) == FAILURE) {
RETURN_THROWS();
}
if (!ZEND_NUM_ARGS()) {
ce = zend_get_executed_scope();
if (ce && ce->parent) {
RETURN_STR_COPY(ce->parent->name);
} else {
RETURN_FALSE;
}
}
if (Z_TYPE_P(arg) == IS_OBJECT) {
ce = Z_OBJ_P(arg)->ce;
} else if (Z_TYPE_P(arg) == IS_STRING) {
ce = zend_lookup_class(Z_STR_P(arg));
}
if (ce && ce->parent) {
RETURN_STR_COPY(ce->parent->name);
} else {
RETURN_FALSE;
}
}
/* }}} */
static void is_a_impl(INTERNAL_FUNCTION_PARAMETERS, zend_bool only_subclass) /* {{{ */
{
zval *obj;
zend_string *class_name;
zend_class_entry *instance_ce;
zend_class_entry *ce;
zend_bool allow_string = only_subclass;
zend_bool retval;
ZEND_PARSE_PARAMETERS_START(2, 3)
Z_PARAM_ZVAL(obj)
Z_PARAM_STR(class_name)
Z_PARAM_OPTIONAL
Z_PARAM_BOOL(allow_string)
ZEND_PARSE_PARAMETERS_END();
/*
* allow_string - is_a default is no, is_subclass_of is yes.
* if it's allowed, then the autoloader will be called if the class does not exist.
* default behaviour is different, as 'is_a' used to be used to test mixed return values
* and there is no easy way to deprecate this.
*/
if (allow_string && Z_TYPE_P(obj) == IS_STRING) {
instance_ce = zend_lookup_class(Z_STR_P(obj));
if (!instance_ce) {
RETURN_FALSE;
}
} else if (Z_TYPE_P(obj) == IS_OBJECT) {
instance_ce = Z_OBJCE_P(obj);
} else {
RETURN_FALSE;
}
if (!only_subclass && EXPECTED(zend_string_equals(instance_ce->name, class_name))) {
retval = 1;
} else {
ce = zend_lookup_class_ex(class_name, NULL, ZEND_FETCH_CLASS_NO_AUTOLOAD);
if (!ce) {
retval = 0;
} else {
if (only_subclass && instance_ce == ce) {
retval = 0;
} else {
retval = instanceof_function(instance_ce, ce);
}
}
}
RETURN_BOOL(retval);
}
/* }}} */
/* {{{ proto bool is_subclass_of(mixed object_or_string, string class_name [, bool allow_string])
Returns true if the object has this class as one of its parents */
ZEND_FUNCTION(is_subclass_of)
{
is_a_impl(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1);
}
/* }}} */
/* {{{ proto bool is_a(mixed object_or_string, string class_name [, bool allow_string])
Returns true if the first argument is an object and is this class or has this class as one of its parents, */
ZEND_FUNCTION(is_a)
{
is_a_impl(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0);
}
/* }}} */
/* {{{ add_class_vars */
static void add_class_vars(zend_class_entry *scope, zend_class_entry *ce, int statics, zval *return_value)
{
zend_property_info *prop_info;
zval *prop, prop_copy;
zend_string *key;
ZEND_HASH_FOREACH_STR_KEY_PTR(&ce->properties_info, key, prop_info) {
if (((prop_info->flags & ZEND_ACC_PROTECTED) &&
!zend_check_protected(prop_info->ce, scope)) ||
((prop_info->flags & ZEND_ACC_PRIVATE) &&
prop_info->ce != scope)) {
continue;
}
prop = NULL;
if (statics && (prop_info->flags & ZEND_ACC_STATIC) != 0) {
prop = &ce->default_static_members_table[prop_info->offset];
ZVAL_DEINDIRECT(prop);
} else if (!statics && (prop_info->flags & ZEND_ACC_STATIC) == 0) {
prop = &ce->default_properties_table[OBJ_PROP_TO_NUM(prop_info->offset)];
}
if (!prop) {
continue;
}
if (Z_ISUNDEF_P(prop)) {
/* Return uninitialized typed properties as a null value */
ZVAL_NULL(&prop_copy);
} else {
/* copy: enforce read only access */
ZVAL_COPY_OR_DUP(&prop_copy, prop);
}
prop = &prop_copy;
/* this is necessary to make it able to work with default array
* properties, returned to user */
if (Z_OPT_TYPE_P(prop) == IS_CONSTANT_AST) {
if (UNEXPECTED(zval_update_constant_ex(prop, NULL) != SUCCESS)) {
return;
}
}
zend_hash_add_new(Z_ARRVAL_P(return_value), key, prop);
} ZEND_HASH_FOREACH_END();
}
/* }}} */
/* {{{ proto array get_class_vars(string class_name)
Returns an array of default properties of the class. */
ZEND_FUNCTION(get_class_vars)
{
zend_string *class_name;
zend_class_entry *ce, *scope;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "S", &class_name) == FAILURE) {
RETURN_THROWS();
}
ce = zend_lookup_class(class_name);
if (!ce) {
RETURN_FALSE;
} else {
array_init(return_value);
if (UNEXPECTED(!(ce->ce_flags & ZEND_ACC_CONSTANTS_UPDATED))) {
if (UNEXPECTED(zend_update_class_constants(ce) != SUCCESS)) {
return;
}
}
scope = zend_get_executed_scope();
add_class_vars(scope, ce, 0, return_value);
add_class_vars(scope, ce, 1, return_value);
}
}
/* }}} */
/* {{{ proto array get_object_vars(object obj)
Returns an array of object properties */
ZEND_FUNCTION(get_object_vars)
{
zval *obj;
zval *value;
HashTable *properties;
zend_string *key;
zend_object *zobj;
zend_ulong num_key;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_OBJECT(obj)
ZEND_PARSE_PARAMETERS_END();
zobj = Z_OBJ_P(obj);
properties = zobj->handlers->get_properties(zobj);
if (properties == NULL) {
RETURN_EMPTY_ARRAY();
}
if (!zobj->ce->default_properties_count && properties == zobj->properties && !GC_IS_RECURSIVE(properties)) {
/* fast copy */
if (EXPECTED(zobj->handlers == &std_object_handlers)) {
RETURN_ARR(zend_proptable_to_symtable(properties, 0));
}
RETURN_ARR(zend_proptable_to_symtable(properties, 1));
} else {
array_init_size(return_value, zend_hash_num_elements(properties));
ZEND_HASH_FOREACH_KEY_VAL(properties, num_key, key, value) {
zend_bool is_dynamic = 1;
if (Z_TYPE_P(value) == IS_INDIRECT) {
value = Z_INDIRECT_P(value);
if (UNEXPECTED(Z_ISUNDEF_P(value))) {
continue;
}
is_dynamic = 0;
}
if (key && zend_check_property_access(zobj, key, is_dynamic) == FAILURE) {
continue;
}
if (Z_ISREF_P(value) && Z_REFCOUNT_P(value) == 1) {
value = Z_REFVAL_P(value);
}
Z_TRY_ADDREF_P(value);
if (UNEXPECTED(!key)) {
/* This case is only possible due to loopholes, e.g. ArrayObject */
zend_hash_index_add(Z_ARRVAL_P(return_value), num_key, value);
} else if (!is_dynamic && ZSTR_VAL(key)[0] == 0) {
const char *prop_name, *class_name;
size_t prop_len;
zend_unmangle_property_name_ex(key, &class_name, &prop_name, &prop_len);
/* We assume here that a mangled property name is never
* numeric. This is probably a safe assumption, but
* theoretically someone might write an extension with
* private, numeric properties. Well, too bad.