Imported from /home/lorry/working-area/delta_php2/php-5.4.13.tar.bz2.HEADphp-5.4.13master

1 files changed, 515 insertions, 0 deletions

diff --git a/Zend/zend_closures.c b/Zend/zend_closures.c
new file mode 100644
index 0000000..a373975
--- /dev/null
+++ b/Zend/zend_closures.c
@@ -0,0 +1,515 @@
+/*
+   +----------------------------------------------------------------------+
+   | Zend Engine                                                          |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 1998-2013 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: Christian Seiler <chris_se@gmx.net>                         |
+   |          Dmitry Stogov <dmitry@zend.com>                             |
+   |          Marcus Boerger <helly@php.net>                              |
+   +----------------------------------------------------------------------+
+*/
+
+/* $Id$ */
+
+#include "zend.h"
+#include "zend_API.h"
+#include "zend_closures.h"
+#include "zend_exceptions.h"
+#include "zend_interfaces.h"
+#include "zend_objects.h"
+#include "zend_objects_API.h"
+#include "zend_globals.h"
+
+#define ZEND_CLOSURE_PRINT_NAME "Closure object"
+
+#define ZEND_CLOSURE_PROPERTY_ERROR() \
+	zend_error(E_RECOVERABLE_ERROR, "Closure object cannot have properties")
+
+typedef struct _zend_closure {
+	zend_object    std;
+	zend_function  func;
+	zval          *this_ptr;
+	HashTable     *debug_info;
+} zend_closure;
+
+/* non-static since it needs to be referenced */
+ZEND_API zend_class_entry *zend_ce_closure;
+static zend_object_handlers closure_handlers;
+
+ZEND_METHOD(Closure, __invoke) /* {{{ */
+{
+	zend_function *func = EG(current_execute_data)->function_state.function;
+	zval ***arguments;
+	zval *closure_result_ptr = NULL;
+
+	arguments = emalloc(sizeof(zval**) * ZEND_NUM_ARGS());
+	if (zend_get_parameters_array_ex(ZEND_NUM_ARGS(), arguments) == FAILURE) {
+		efree(arguments);
+		zend_error(E_RECOVERABLE_ERROR, "Cannot get arguments for calling closure");
+		RETVAL_FALSE;
+	} else if (call_user_function_ex(CG(function_table), NULL, this_ptr, &closure_result_ptr, ZEND_NUM_ARGS(), arguments, 1, NULL TSRMLS_CC) == FAILURE) {
+		RETVAL_FALSE;
+	} else if (closure_result_ptr) {
+		if (Z_ISREF_P(closure_result_ptr) && return_value_ptr) {
+			if (return_value) {
+				zval_ptr_dtor(&return_value);
+			}
+			*return_value_ptr = closure_result_ptr;
+		} else {
+			RETVAL_ZVAL(closure_result_ptr, 1, 1);
+		}
+	}
+	efree(arguments);
+
+	/* destruct the function also, then - we have allocated it in get_method */
+	efree((char*)func->internal_function.function_name);
+	efree(func);
+}
+/* }}} */
+
+/* {{{ proto Closure Closure::bind(Closure $old, object $to [, mixed $scope = "static" ] )
+   Create a closure from another one and bind to another object and scope */
+ZEND_METHOD(Closure, bind)
+{
+	zval *newthis, *zclosure, *scope_arg = NULL;
+	zend_closure *closure;
+	zend_class_entry *ce, **ce_p;
+
+	if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Oo!|z", &zclosure, zend_ce_closure, &newthis, &scope_arg) == FAILURE) {
+		RETURN_NULL();
+	}
+
+	closure = (zend_closure *)zend_object_store_get_object(zclosure TSRMLS_CC);	
+
+	if ((newthis != NULL) && (closure->func.common.fn_flags & ZEND_ACC_STATIC)) {
+		zend_error(E_WARNING, "Cannot bind an instance to a static closure");
+	}
+
+	if (scope_arg != NULL) { /* scope argument was given */
+		if (IS_ZEND_STD_OBJECT(*scope_arg)) {
+			ce = Z_OBJCE_P(scope_arg);
+		} else if (Z_TYPE_P(scope_arg) == IS_NULL) {
+			ce = NULL;
+		} else {
+			char *class_name;
+			int class_name_len;
+			zval tmp_zval;
+			INIT_ZVAL(tmp_zval);
+
+			if (Z_TYPE_P(scope_arg) == IS_STRING) {
+				class_name = Z_STRVAL_P(scope_arg);
+				class_name_len = Z_STRLEN_P(scope_arg);
+			} else {
+				tmp_zval = *scope_arg;
+				zval_copy_ctor(&tmp_zval);
+				convert_to_string(&tmp_zval);
+				class_name = Z_STRVAL(tmp_zval);
+				class_name_len = Z_STRLEN(tmp_zval);
+			}
+
+			if ((class_name_len == sizeof("static") - 1) &&
+				(memcmp("static", class_name, sizeof("static") - 1) == 0)) {
+				ce = closure->func.common.scope;
+			}
+			else if (zend_lookup_class_ex(class_name, class_name_len, NULL, 1, &ce_p TSRMLS_CC) == FAILURE) {
+				zend_error(E_WARNING, "Class '%s' not found", class_name);
+				zval_dtor(&tmp_zval);
+				RETURN_NULL();
+			} else {
+				ce = *ce_p;
+			}
+			zval_dtor(&tmp_zval);
+		}
+	} else { /* scope argument not given; do not change the scope by default */
+		ce = closure->func.common.scope;
+	}
+
+	zend_create_closure(return_value, &closure->func, ce, newthis TSRMLS_CC);
+}
+/* }}} */
+
+static zend_function *zend_closure_get_constructor(zval *object TSRMLS_DC) /* {{{ */
+{
+	zend_error(E_RECOVERABLE_ERROR, "Instantiation of 'Closure' is not allowed");
+	return NULL;
+}
+/* }}} */
+
+static int zend_closure_compare_objects(zval *o1, zval *o2 TSRMLS_DC) /* {{{ */
+{
+	return (Z_OBJ_HANDLE_P(o1) != Z_OBJ_HANDLE_P(o2));
+}
+/* }}} */
+
+ZEND_API zend_function *zend_get_closure_invoke_method(zval *obj TSRMLS_DC) /* {{{ */
+{
+	zend_closure *closure = (zend_closure *)zend_object_store_get_object(obj TSRMLS_CC);	
+	zend_function *invoke = (zend_function*)emalloc(sizeof(zend_function));
+
+	invoke->common = closure->func.common;
+	invoke->type = ZEND_INTERNAL_FUNCTION;
+	invoke->internal_function.fn_flags = ZEND_ACC_PUBLIC | ZEND_ACC_CALL_VIA_HANDLER | (closure->func.common.fn_flags & ZEND_ACC_RETURN_REFERENCE);
+	invoke->internal_function.handler = ZEND_MN(Closure___invoke);
+	invoke->internal_function.module = 0;
+	invoke->internal_function.scope = zend_ce_closure;
+	invoke->internal_function.function_name = estrndup(ZEND_INVOKE_FUNC_NAME, sizeof(ZEND_INVOKE_FUNC_NAME)-1);
+	return invoke;
+}
+/* }}} */
+
+ZEND_API const zend_function *zend_get_closure_method_def(zval *obj TSRMLS_DC) /* {{{ */
+{
+	zend_closure *closure = (zend_closure *)zend_object_store_get_object(obj TSRMLS_CC);	
+	return &closure->func;
+}
+/* }}} */
+
+ZEND_API zval* zend_get_closure_this_ptr(zval *obj TSRMLS_DC) /* {{{ */
+{
+	zend_closure *closure = (zend_closure *)zend_object_store_get_object(obj TSRMLS_CC);	
+	return closure->this_ptr;
+}
+/* }}} */
+
+static zend_function *zend_closure_get_method(zval **object_ptr, char *method_name, int method_len, const zend_literal *key TSRMLS_DC) /* {{{ */
+{
+	char *lc_name;
+	ALLOCA_FLAG(use_heap)
+
+	lc_name = do_alloca(method_len + 1, use_heap);
+	zend_str_tolower_copy(lc_name, method_name, method_len);
+	if ((method_len == sizeof(ZEND_INVOKE_FUNC_NAME)-1) &&
+		memcmp(lc_name, ZEND_INVOKE_FUNC_NAME, sizeof(ZEND_INVOKE_FUNC_NAME)-1) == 0
+	) {
+		free_alloca(lc_name, use_heap);
+		return zend_get_closure_invoke_method(*object_ptr TSRMLS_CC);
+	}
+	free_alloca(lc_name, use_heap);
+	return std_object_handlers.get_method(object_ptr, method_name, method_len, key TSRMLS_CC);
+}
+/* }}} */
+
+static zval *zend_closure_read_property(zval *object, zval *member, int type, const zend_literal *key TSRMLS_DC) /* {{{ */
+{
+	ZEND_CLOSURE_PROPERTY_ERROR();
+	Z_ADDREF(EG(uninitialized_zval));
+	return &EG(uninitialized_zval);
+}
+/* }}} */
+
+static void zend_closure_write_property(zval *object, zval *member, zval *value, const zend_literal *key TSRMLS_DC) /* {{{ */
+{
+	ZEND_CLOSURE_PROPERTY_ERROR();
+}
+/* }}} */
+
+static zval **zend_closure_get_property_ptr_ptr(zval *object, zval *member, const zend_literal *key TSRMLS_DC) /* {{{ */
+{
+	ZEND_CLOSURE_PROPERTY_ERROR();
+	return NULL;
+}
+/* }}} */
+
+static int zend_closure_has_property(zval *object, zval *member, int has_set_exists, const zend_literal *key TSRMLS_DC) /* {{{ */
+{
+	if (has_set_exists != 2) {
+		ZEND_CLOSURE_PROPERTY_ERROR();
+	}
+	return 0;
+}
+/* }}} */
+
+static void zend_closure_unset_property(zval *object, zval *member, const zend_literal *key TSRMLS_DC) /* {{{ */
+{
+	ZEND_CLOSURE_PROPERTY_ERROR();
+}
+/* }}} */
+
+static void zend_closure_free_storage(void *object TSRMLS_DC) /* {{{ */
+{
+	zend_closure *closure = (zend_closure *)object;
+
+	zend_object_std_dtor(&closure->std TSRMLS_CC);
+
+	if (closure->func.type == ZEND_USER_FUNCTION) {
+		zend_execute_data *ex = EG(current_execute_data);
+		while (ex) {
+			if (ex->op_array == &closure->func.op_array) {
+				zend_error(E_ERROR, "Cannot destroy active lambda function");
+			}
+			ex = ex->prev_execute_data;
+		}
+		destroy_op_array(&closure->func.op_array TSRMLS_CC);
+	}
+
+	if (closure->debug_info != NULL) {
+		zend_hash_destroy(closure->debug_info);
+		efree(closure->debug_info);
+	}
+
+	if (closure->this_ptr) {
+		zval_ptr_dtor(&closure->this_ptr);
+	}
+
+	efree(closure);
+}
+/* }}} */
+
+static zend_object_value zend_closure_new(zend_class_entry *class_type TSRMLS_DC) /* {{{ */
+{
+	zend_closure *closure;
+	zend_object_value object;
+
+	closure = emalloc(sizeof(zend_closure));
+	memset(closure, 0, sizeof(zend_closure));
+
+	zend_object_std_init(&closure->std, class_type TSRMLS_CC);
+
+	object.handle = zend_objects_store_put(closure, (zend_objects_store_dtor_t)zend_objects_destroy_object, (zend_objects_free_object_storage_t) zend_closure_free_storage, NULL TSRMLS_CC);
+	object.handlers = &closure_handlers;
+
+	return object;
+}
+/* }}} */
+
+static zend_object_value zend_closure_clone(zval *zobject TSRMLS_DC) /* {{{ */
+{
+	zend_closure *closure = (zend_closure *)zend_object_store_get_object(zobject TSRMLS_CC);
+	zval result;
+
+	zend_create_closure(&result, &closure->func, closure->func.common.scope, closure->this_ptr TSRMLS_CC);
+	return Z_OBJVAL(result);
+}
+/* }}} */
+
+
+int zend_closure_get_closure(zval *obj, zend_class_entry **ce_ptr, zend_function **fptr_ptr, zval **zobj_ptr TSRMLS_DC) /* {{{ */
+{
+	zend_closure *closure;
+
+	if (Z_TYPE_P(obj) != IS_OBJECT) {
+		return FAILURE;
+	}
+
+	closure = (zend_closure *)zend_object_store_get_object(obj TSRMLS_CC);
+	*fptr_ptr = &closure->func;
+
+	if (closure->this_ptr) {
+		if (zobj_ptr) {
+			*zobj_ptr = closure->this_ptr;
+		}
+		*ce_ptr = Z_OBJCE_P(closure->this_ptr);
+	} else {
+		if (zobj_ptr) {
+			*zobj_ptr = NULL;
+		}
+		*ce_ptr = closure->func.common.scope;
+	}
+	return SUCCESS;
+}
+/* }}} */
+
+static HashTable *zend_closure_get_debug_info(zval *object, int *is_temp TSRMLS_DC) /* {{{ */
+{
+	zend_closure *closure = (zend_closure *)zend_object_store_get_object(object TSRMLS_CC);
+	zval *val;
+	struct _zend_arg_info *arg_info = closure->func.common.arg_info;
+
+	*is_temp = 0;
+
+	if (closure->debug_info == NULL) {
+		ALLOC_HASHTABLE(closure->debug_info);
+		zend_hash_init(closure->debug_info, 1, NULL, ZVAL_PTR_DTOR, 0);
+	}
+	if (closure->debug_info->nApplyCount == 0) {
+		if (closure->func.type == ZEND_USER_FUNCTION && closure->func.op_array.static_variables) {
+			HashTable *static_variables = closure->func.op_array.static_variables;
+			MAKE_STD_ZVAL(val);
+			array_init(val);
+			zend_hash_copy(Z_ARRVAL_P(val), static_variables, (copy_ctor_func_t)zval_add_ref, NULL, sizeof(zval*));
+			zend_hash_update(closure->debug_info, "static", sizeof("static"), (void *) &val, sizeof(zval *), NULL);
+		}
+
+		if (closure->this_ptr) {
+			Z_ADDREF_P(closure->this_ptr);
+			zend_symtable_update(closure->debug_info, "this", sizeof("this"), (void *) &closure->this_ptr, sizeof(zval *), NULL);
+		}
+
+		if (arg_info) {
+			zend_uint i, required = closure->func.common.required_num_args;
+
+			MAKE_STD_ZVAL(val);
+			array_init(val);
+
+			for (i = 0; i < closure->func.common.num_args; i++) {
+				char *name, *info;
+				int name_len, info_len;
+				if (arg_info->name) {
+					name_len = zend_spprintf(&name, 0, "%s$%s",
+									arg_info->pass_by_reference ? "&" : "",
+									arg_info->name);
+				} else {
+					name_len = zend_spprintf(&name, 0, "%s$param%d",
+									arg_info->pass_by_reference ? "&" : "",
+									i + 1);
+				}
+				info_len = zend_spprintf(&info, 0, "%s",
+								i >= required ? "<optional>" : "<required>");
+				add_assoc_stringl_ex(val, name, name_len + 1, info, info_len, 0);
+				efree(name);
+				arg_info++;
+			}
+			zend_hash_update(closure->debug_info, "parameter", sizeof("parameter"), (void *) &val, sizeof(zval *), NULL);
+		}
+	}
+
+	return closure->debug_info;
+}
+/* }}} */
+
+static HashTable *zend_closure_get_gc(zval *obj, zval ***table, int *n TSRMLS_DC) /* {{{ */
+{
+	zend_closure *closure = (zend_closure *)zend_object_store_get_object(obj TSRMLS_CC);	
+
+	*table = closure->this_ptr ? &closure->this_ptr : NULL;
+	*n = closure->this_ptr ? 1 : 0;
+	return (closure->func.type == ZEND_USER_FUNCTION) ?
+		closure->func.op_array.static_variables : NULL;
+}
+/* }}} */
+
+/* {{{ proto Closure::__construct()
+   Private constructor preventing instantiation */
+ZEND_METHOD(Closure, __construct)
+{
+	zend_error(E_RECOVERABLE_ERROR, "Instantiation of 'Closure' is not allowed");
+}
+/* }}} */
+
+ZEND_BEGIN_ARG_INFO_EX(arginfo_closure_bindto, 0, 0, 1)
+	ZEND_ARG_INFO(0, newthis)
+	ZEND_ARG_INFO(0, newscope)
+ZEND_END_ARG_INFO()
+
+ZEND_BEGIN_ARG_INFO_EX(arginfo_closure_bind, 0, 0, 2)
+	ZEND_ARG_INFO(0, closure)
+	ZEND_ARG_INFO(0, newthis)
+	ZEND_ARG_INFO(0, newscope)
+ZEND_END_ARG_INFO()
+
+static const zend_function_entry closure_functions[] = {
+	ZEND_ME(Closure, __construct, NULL, ZEND_ACC_PRIVATE)
+	ZEND_ME(Closure, bind, arginfo_closure_bind, ZEND_ACC_PUBLIC|ZEND_ACC_STATIC)
+	ZEND_MALIAS(Closure, bindTo, bind, arginfo_closure_bindto, ZEND_ACC_PUBLIC)
+	{NULL, NULL, NULL}
+};
+
+void zend_register_closure_ce(TSRMLS_D) /* {{{ */
+{
+	zend_class_entry ce;
+
+	INIT_CLASS_ENTRY(ce, "Closure", closure_functions);
+	zend_ce_closure = zend_register_internal_class(&ce TSRMLS_CC);
+	zend_ce_closure->ce_flags |= ZEND_ACC_FINAL_CLASS;
+	zend_ce_closure->create_object = zend_closure_new;
+	zend_ce_closure->serialize = zend_class_serialize_deny;
+	zend_ce_closure->unserialize = zend_class_unserialize_deny;
+
+	memcpy(&closure_handlers, zend_get_std_object_handlers(), sizeof(zend_object_handlers));
+	closure_handlers.get_constructor = zend_closure_get_constructor;
+	closure_handlers.get_method = zend_closure_get_method;
+	closure_handlers.write_property = zend_closure_write_property;
+	closure_handlers.read_property = zend_closure_read_property;
+	closure_handlers.get_property_ptr_ptr = zend_closure_get_property_ptr_ptr;
+	closure_handlers.has_property = zend_closure_has_property;
+	closure_handlers.unset_property = zend_closure_unset_property;
+	closure_handlers.compare_objects = zend_closure_compare_objects;
+	closure_handlers.clone_obj = zend_closure_clone;
+	closure_handlers.get_debug_info = zend_closure_get_debug_info;
+	closure_handlers.get_closure = zend_closure_get_closure;
+	closure_handlers.get_gc = zend_closure_get_gc;
+}
+/* }}} */
+
+ZEND_API void zend_create_closure(zval *res, zend_function *func, zend_class_entry *scope, zval *this_ptr TSRMLS_DC) /* {{{ */
+{
+	zend_closure *closure;
+
+	object_init_ex(res, zend_ce_closure);
+
+	closure = (zend_closure *)zend_object_store_get_object(res TSRMLS_CC);
+
+	closure->func = *func;
+	closure->func.common.prototype = NULL;
+
+	if ((scope == NULL) && (this_ptr != NULL)) {
+		/* use dummy scope if we're binding an object without specifying a scope */
+		/* maybe it would be better to create one for this purpose */
+		scope = zend_ce_closure;
+	}
+
+	if (closure->func.type == ZEND_USER_FUNCTION) {
+		if (closure->func.op_array.static_variables) {
+			HashTable *static_variables = closure->func.op_array.static_variables;
+
+			ALLOC_HASHTABLE(closure->func.op_array.static_variables);
+			zend_hash_init(closure->func.op_array.static_variables, zend_hash_num_elements(static_variables), NULL, ZVAL_PTR_DTOR, 0);
+			zend_hash_apply_with_arguments(static_variables TSRMLS_CC, (apply_func_args_t)zval_copy_static_var, 1, closure->func.op_array.static_variables);
+		}
+		closure->func.op_array.run_time_cache = NULL;
+		(*closure->func.op_array.refcount)++;
+	} else {
+		/* verify that we aren't binding internal function to a wrong scope */
+		if(func->common.scope != NULL) {
+			if(scope && !instanceof_function(scope, func->common.scope TSRMLS_CC)) {
+				zend_error(E_WARNING, "Cannot bind function %s::%s to scope class %s", func->common.scope->name, func->common.function_name, scope->name);
+				scope = NULL;
+			}
+			if(scope && this_ptr && (func->common.fn_flags & ZEND_ACC_STATIC) == 0 && 
+					!instanceof_function(Z_OBJCE_P(this_ptr), closure->func.common.scope TSRMLS_CC)) {
+				zend_error(E_WARNING, "Cannot bind function %s::%s to object of class %s", func->common.scope->name, func->common.function_name, Z_OBJCE_P(this_ptr)->name);
+				scope = NULL;
+				this_ptr = NULL;
+			}
+		} else {
+			/* if it's a free function, we won't set scope & this since they're meaningless */
+			this_ptr = NULL;
+			scope = NULL;
+		}
+	}
+
+	/* Invariants:
+	 * If the closure is unscoped, it has no bound object.
+	 * The the closure is scoped, it's either static or it's bound */
+	closure->func.common.scope = scope;
+	if (scope) {
+		closure->func.common.fn_flags |= ZEND_ACC_PUBLIC;
+		if (this_ptr && (closure->func.common.fn_flags & ZEND_ACC_STATIC) == 0) {
+			closure->this_ptr = this_ptr;
+			Z_ADDREF_P(this_ptr);
+		} else {
+			closure->func.common.fn_flags |= ZEND_ACC_STATIC;
+			closure->this_ptr = NULL;
+		}
+	} else {
+		closure->this_ptr = NULL;
+	}
+}
+/* }}} */
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ */