text: /*
     +----------------------------------------------------------------------+
     | Zend Engine                                                          |
     +----------------------------------------------------------------------+
     | Copyright (c) 1998-2017 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@zend.com>                                |
     |          Zeev Suraski <zeev@zend.com>                                |
     |          Dmitry Stogov <dmitry@zend.com>                             |
     +----------------------------------------------------------------------+
  */
  
  /* $Id$ */
  
  #include "zend.h"
  #include "zend_globals.h"
  #include "zend_variables.h"
  #include "zend_API.h"
  #include "zend_interfaces.h"
  #include "zend_exceptions.h"
  
  ZEND_API void zend_object_std_init(zend_object *object, zend_class_entry *ce)
  {
  	GC_SET_REFCOUNT(object, 1);
  	GC_TYPE_INFO(object) = IS_OBJECT | (GC_COLLECTABLE << GC_FLAGS_SHIFT);
  	object->ce = ce;
  	object->properties = NULL;
  	zend_objects_store_put(object);
  	if (UNEXPECTED(ce->ce_flags & ZEND_ACC_USE_GUARDS)) {
  		GC_FLAGS(object) |= IS_OBJ_USE_GUARDS;
  		ZVAL_UNDEF(object->properties_table + object->ce->default_properties_count);
  	}
  }
  
  ZEND_API void zend_object_std_dtor(zend_object *object)
  {
  	zval *p, *end;
  
  	if (object->properties) {
  		if (EXPECTED(!(GC_FLAGS(object->properties) & IS_ARRAY_IMMUTABLE))) {
  			if (EXPECTED(GC_DELREF(object->properties) == 0)) {
  				zend_array_destroy(object->properties);
  			}
  		}
  	}
  	p = object->properties_table;
  	if (EXPECTED(object->ce->default_properties_count)) {
  		end = p + object->ce->default_properties_count;
  		do {
  			i_zval_ptr_dtor(p ZEND_FILE_LINE_CC);
  			p++;
  		} while (p != end);
  	}
  	if (UNEXPECTED(GC_FLAGS(object) & IS_OBJ_HAS_GUARDS)) {
  		if (EXPECTED(Z_TYPE_P(p) == IS_STRING)) {
  			zend_string_release(Z_STR_P(p));
  		} else {
  			HashTable *guards;
  
  			ZEND_ASSERT(Z_TYPE_P(p) == IS_ARRAY);
  			guards = Z_ARRVAL_P(p);
  			ZEND_ASSERT(guards != NULL);
  			zend_hash_destroy(guards);
  			FREE_HASHTABLE(guards);
  		}
  	}
  }
  
  ZEND_API void zend_objects_destroy_object(zend_object *object)
  {
  	zend_function *destructor = object->ce->destructor;
  
  	if (destructor) {
  		zend_object *old_exception;
  		zval obj;
  		zend_class_entry *orig_fake_scope;
  
  		if (destructor->op_array.fn_flags & (ZEND_ACC_PRIVATE|ZEND_ACC_PROTECTED)) {
  			if (destructor->op_array.fn_flags & ZEND_ACC_PRIVATE) {
  				/* Ensure that if we're calling a private function, we're allowed to do so.
  				 */
  				if (EG(current_execute_data)) {
  					zend_class_entry *scope = zend_get_executed_scope();
  
  					if (object->ce != scope) {
  						zend_throw_error(NULL,
  							"Call to private %s::__destruct() from context '%s'",
  							ZSTR_VAL(object->ce->name),
  							scope ? ZSTR_VAL(scope->name) : "");
  						return;
  					}
  				} else {
  					zend_error(E_WARNING,
  						"Call to private %s::__destruct() from context '' during shutdown ignored",
  						ZSTR_VAL(object->ce->name));
  					return;
  				}
  			} else {
  				/* Ensure that if we're calling a protected function, we're allowed to do so.
  				 */
  				if (EG(current_execute_data)) {
  					zend_class_entry *scope = zend_get_executed_scope();
  
  					if (!zend_check_protected(zend_get_function_root_class(destructor), scope)) {
  						zend_throw_error(NULL,
  							"Call to protected %s::__destruct() from context '%s'",
  							ZSTR_VAL(object->ce->name),
  							scope ? ZSTR_VAL(scope->name) : "");
  						return;
  					}
  				} else {
  					zend_error(E_WARNING,
  						"Call to protected %s::__destruct() from context '' during shutdown ignored",
  						ZSTR_VAL(object->ce->name));
  					return;
  				}
  			}
  		}
  
  		GC_ADDREF(object);
  		ZVAL_OBJ(&obj, object);
  
  		/* Make sure that destructors are protected from previously thrown exceptions.
  		 * For example, if an exception was thrown in a function and when the function's
  		 * local variable destruction results in a destructor being called.
  		 */
  		old_exception = NULL;
  		if (EG(exception)) {
  			if (EG(exception) == object) {
  				zend_error_noreturn(E_CORE_ERROR, "Attempt to destruct pending exception");
  			} else {
  				old_exception = EG(exception);
  				EG(exception) = NULL;
  			}
  		}
  		orig_fake_scope = EG(fake_scope);
  		EG(fake_scope) = NULL;
  		zend_call_method_with_0_params(&obj, object->ce, &destructor, ZEND_DESTRUCTOR_FUNC_NAME, NULL);
  		if (old_exception) {
  			if (EG(exception)) {
  				zend_exception_set_previous(EG(exception), old_exception);
  			} else {
  				EG(exception) = old_exception;
  			}
  		}
  		zval_ptr_dtor(&obj);
  		EG(fake_scope) = orig_fake_scope;
  	}
  }
  
  ZEND_API zend_object *zend_objects_new(zend_class_entry *ce)
  {
  	zend_object *object = emalloc(sizeof(zend_object) + zend_object_properties_size(ce));
  
  	zend_object_std_init(object, ce);
  	object->handlers = &std_object_handlers;
  	return object;
  }
  
  ZEND_API void zend_objects_clone_members(zend_object *new_object, zend_object *old_object)
  {
  	if (old_object->ce->default_properties_count) {
  		zval *src = old_object->properties_table;
  		zval *dst = new_object->properties_table;
  		zval *end = src + old_object->ce->default_properties_count;
  
  		do {
  			i_zval_ptr_dtor(dst ZEND_FILE_LINE_CC);
  			ZVAL_COPY_VALUE(dst, src);
  			zval_add_ref(dst);
  			src++;
  			dst++;
  		} while (src != end);
  	} else if (old_object->properties && !old_object->ce->clone) {
  		/* fast copy */
  		if (EXPECTED(old_object->handlers == &std_object_handlers)) {
  			if (EXPECTED(!(GC_FLAGS(old_object->properties) & IS_ARRAY_IMMUTABLE))) {
  				GC_ADDREF(old_object->properties);
  			}
  			new_object->properties = old_object->properties;
  			return;
  		}
  	}
  
  	if (old_object->properties &&
  	    EXPECTED(zend_hash_num_elements(old_object->properties))) {
  		zval *prop, new_prop;
  		zend_ulong num_key;
  		zend_string *key;
  
  		if (!new_object->properties) {
  			new_object->properties = zend_new_array(zend_hash_num_elements(old_object->properties));
  			zend_hash_real_init(new_object->properties, 0);
  		} else {
  			zend_hash_extend(new_object->properties, new_object->properties->nNumUsed + zend_hash_num_elements(old_object->properties), 0);
  		}
  
  		new_object->properties->u.v.flags |=
  			old_object->properties->u.v.flags & HASH_FLAG_HAS_EMPTY_IND;
  
  		ZEND_HASH_FOREACH_KEY_VAL(old_object->properties, num_key, key, prop) {
  			if (Z_TYPE_P(prop) == IS_INDIRECT) {
  				ZVAL_INDIRECT(&new_prop, new_object->properties_table + (Z_INDIRECT_P(prop) - old_object->properties_table));
  			} else {
  				ZVAL_COPY_VALUE(&new_prop, prop);
  				zval_add_ref(&new_prop);
  			}
  			if (EXPECTED(key)) {
  				_zend_hash_append(new_object->properties, key, &new_prop);
  			} else {
  				zend_hash_index_add_new(new_object->properties, num_key, &new_prop);
  			}
  		} ZEND_HASH_FOREACH_END();
  	}
  
  	if (old_object->ce->clone) {
  		zval new_obj;
  
  		ZVAL_OBJ(&new_obj, new_object);
  		Z_ADDREF(new_obj);
  		zend_call_method_with_0_params(&new_obj, old_object->ce, &old_object->ce->clone, ZEND_CLONE_FUNC_NAME, NULL);
  		zval_ptr_dtor(&new_obj);
  	}
  }
  
  ZEND_API zend_object *zend_objects_clone_obj(zval *zobject)
  {
  	zend_object *old_object;
  	zend_object *new_object;
  
  	/* assume that create isn't overwritten, so when clone depends on the
  	 * overwritten one then it must itself be overwritten */
  	old_object = Z_OBJ_P(zobject);
  	new_object = zend_objects_new(old_object->ce);
  
  	/* zend_objects_clone_members() expect the properties to be initialized. */
  	if (new_object->ce->default_properties_count) {
  		zval *p = new_object->properties_table;
  		zval *end = p + new_object->ce->default_properties_count;
  		do {
  			ZVAL_UNDEF(p);
  			p++;
  		} while (p != end);
  	}
  
  	zend_objects_clone_members(new_object, old_object);
  
  	return new_object;
  }
  
  /*
   * Local variables:
   * tab-width: 4
   * c-basic-offset: 4
   * indent-tabs-mode: t
   * End:
   * vim600: sw=4 ts=4 fdm=marker
   * vim<600: sw=4 ts=4
   */
  