/* Copyright 2014-2015 Samsung Electronics Co., Ltd. * Copyright 2015-2016 University of Szeged. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "ecma-alloc.h" #include "ecma-array-object.h" #include "ecma-builtin-helpers.h" #include "ecma-builtins.h" #include "ecma-conversion.h" #include "ecma-exceptions.h" #include "ecma-gc.h" #include "ecma-globals.h" #include "ecma-helpers.h" #include "ecma-objects.h" #include "ecma-objects-general.h" #include "ecma-try-catch-macro.h" #include "jrt.h" #define ECMA_BUILTINS_INTERNAL #include "ecma-builtins-internal.h" #define BUILTIN_INC_HEADER_NAME "ecma-builtin-object.inc.h" #define BUILTIN_UNDERSCORED_ID object #include "ecma-builtin-internal-routines-template.inc.h" /** \addtogroup ecma ECMA * @{ * * \addtogroup ecmabuiltins * @{ * * \addtogroup object ECMA Object object built-in * @{ */ /** * Handle calling [[Call]] of built-in Object object * * @return ecma value */ ecma_value_t ecma_builtin_object_dispatch_call (const ecma_value_t *arguments_list_p, /**< arguments list */ ecma_length_t arguments_list_len) /**< number of arguments */ { JERRY_ASSERT (arguments_list_len == 0 || arguments_list_p != NULL); ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY); if (arguments_list_len == 0 || ecma_is_value_undefined (arguments_list_p[0]) || ecma_is_value_null (arguments_list_p[0])) { ret_value = ecma_builtin_object_dispatch_construct (arguments_list_p, arguments_list_len); } else { ret_value = ecma_op_to_object (arguments_list_p[0]); } return ret_value; } /* ecma_builtin_object_dispatch_call */ /** * Handle calling [[Construct]] of built-in Object object * * @return ecma value */ ecma_value_t ecma_builtin_object_dispatch_construct (const ecma_value_t *arguments_list_p, /**< arguments list */ ecma_length_t arguments_list_len) /**< number of arguments */ { JERRY_ASSERT (arguments_list_len == 0 || arguments_list_p != NULL); if (arguments_list_len == 0) { ecma_object_t *obj_p = ecma_op_create_object_object_noarg (); return ecma_make_object_value (obj_p); } else { return ecma_op_create_object_object_arg (arguments_list_p[0]); } } /* ecma_builtin_object_dispatch_construct */ /** * The Object object's 'getPrototypeOf' routine * * See also: * ECMA-262 v5, 15.2.3.2 * * @return ecma value * Returned value must be freed with ecma_free_value. */ static ecma_value_t ecma_builtin_object_object_get_prototype_of (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */ ecma_value_t arg) /**< routine's argument */ { ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY); /* 1. */ if (!ecma_is_value_object (arg)) { ret_value = ecma_raise_type_error (""); } else { /* 2. */ ecma_object_t *obj_p = ecma_get_object_from_value (arg); ecma_object_t *prototype_p = ecma_get_object_prototype (obj_p); if (prototype_p) { ret_value = ecma_make_object_value (prototype_p); ecma_ref_object (prototype_p); } else { ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_NULL); } } return ret_value; } /* ecma_builtin_object_object_get_prototype_of */ /** * The Object object's 'getOwnPropertyNames' routine * * See also: * ECMA-262 v5, 15.2.3.4 * * @return ecma value * Returned value must be freed with ecma_free_value. */ static ecma_value_t ecma_builtin_object_object_get_own_property_names (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */ ecma_value_t arg) /**< routine's argument */ { ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY); if (!ecma_is_value_object (arg)) { /* 1. */ ret_value = ecma_raise_type_error (""); } else { ecma_object_t *obj_p = ecma_get_object_from_value (arg); /* 2-5. */ ret_value = ecma_builtin_helper_object_get_properties (obj_p, false); } return ret_value; } /* ecma_builtin_object_object_get_own_property_names */ /** * The Object object's 'seal' routine * * See also: * ECMA-262 v5, 15.2.3.8 * * @return ecma value * Returned value must be freed with ecma_free_value. */ static ecma_value_t ecma_builtin_object_object_seal (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */ ecma_value_t arg) /**< routine's argument */ { ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY); // 1. if (!ecma_is_value_object (arg)) { ret_value = ecma_raise_type_error (""); } else { // 2. ecma_object_t *obj_p = ecma_get_object_from_value (arg); ecma_collection_header_t *props_p = ecma_op_object_get_property_names (obj_p, false, false, false); ecma_collection_iterator_t iter; ecma_collection_iterator_init (&iter, props_p); while (ecma_collection_iterator_next (&iter) && ecma_is_value_empty (ret_value)) { ecma_string_t *property_name_p = ecma_get_string_from_value (*iter.current_value_p); ecma_property_t *property_p = ecma_op_object_get_own_property (obj_p, property_name_p); // 2.a ecma_property_descriptor_t prop_desc = ecma_get_property_descriptor_from_property (property_p); // 2.b if (ecma_is_property_configurable (property_p)) { prop_desc.is_configurable = false; } // 2.c ECMA_TRY_CATCH (define_own_prop_ret, ecma_op_object_define_own_property (obj_p, property_name_p, &prop_desc, true), ret_value); ECMA_FINALIZE (define_own_prop_ret); ecma_free_property_descriptor (&prop_desc); } ecma_free_values_collection (props_p, true); if (ecma_is_value_empty (ret_value)) { // 3. ecma_set_object_extensible (obj_p, false); // 4. ret_value = ecma_copy_value (arg, true); } } return ret_value; } /* ecma_builtin_object_object_seal */ /** * The Object object's 'freeze' routine * * See also: * ECMA-262 v5, 15.2.3.9 * * @return ecma value * Returned value must be freed with ecma_free_value. */ static ecma_value_t ecma_builtin_object_object_freeze (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */ ecma_value_t arg) /**< routine's argument */ { ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY); // 1. if (!ecma_is_value_object (arg)) { ret_value = ecma_raise_type_error (""); } else { // 2. ecma_object_t *obj_p = ecma_get_object_from_value (arg); ecma_collection_header_t *props_p = ecma_op_object_get_property_names (obj_p, false, false, false); ecma_collection_iterator_t iter; ecma_collection_iterator_init (&iter, props_p); while (ecma_collection_iterator_next (&iter) && ecma_is_value_empty (ret_value)) { ecma_string_t *property_name_p = ecma_get_string_from_value (*iter.current_value_p); ecma_property_t *property_p = ecma_op_object_get_own_property (obj_p, property_name_p); // 2.a ecma_property_descriptor_t prop_desc = ecma_get_property_descriptor_from_property (property_p); // 2.b if (property_p->type == ECMA_PROPERTY_NAMEDDATA && ecma_is_property_writable (property_p)) { prop_desc.is_writable = false; } // 2.c if (ecma_is_property_configurable (property_p)) { prop_desc.is_configurable = false; } // 2.d ECMA_TRY_CATCH (define_own_prop_ret, ecma_op_object_define_own_property (obj_p, property_name_p, &prop_desc, true), ret_value); ECMA_FINALIZE (define_own_prop_ret); ecma_free_property_descriptor (&prop_desc); } ecma_free_values_collection (props_p, true); if (ecma_is_value_empty (ret_value)) { // 3. ecma_set_object_extensible (obj_p, false); // 4. ret_value = ecma_copy_value (arg, true); } } return ret_value; } /* ecma_builtin_object_object_freeze */ /** * The Object object's 'preventExtensions' routine * * See also: * ECMA-262 v5, 15.2.3.10 * * @return ecma value * Returned value must be freed with ecma_free_value. */ static ecma_value_t ecma_builtin_object_object_prevent_extensions (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */ ecma_value_t arg) /**< routine's argument */ { ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY); if (!ecma_is_value_object (arg)) { ret_value = ecma_raise_type_error (""); } else { ecma_object_t *obj_p = ecma_get_object_from_value (arg); ecma_set_object_extensible (obj_p, false); ret_value = ecma_copy_value (arg, true); } return ret_value; } /* ecma_builtin_object_object_prevent_extensions */ /** * The Object object's 'isSealed' routine * * See also: * ECMA-262 v5, 15.2.3.11 * * @return ecma value * Returned value must be freed with ecma_free_value. */ static ecma_value_t ecma_builtin_object_object_is_sealed (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */ ecma_value_t arg) /**< routine's argument */ { ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY); // 1. if (!ecma_is_value_object (arg)) { ret_value = ecma_raise_type_error (""); } else { ecma_object_t *obj_p = ecma_get_object_from_value (arg); bool is_sealed; // 3. if (ecma_get_object_extensible (obj_p)) { is_sealed = false; } else { /* the value can be updated in the loop below */ is_sealed = true; // 2. ecma_collection_header_t *props_p = ecma_op_object_get_property_names (obj_p, false, false, false); ecma_collection_iterator_t iter; ecma_collection_iterator_init (&iter, props_p); while (ecma_collection_iterator_next (&iter)) { ecma_string_t *property_name_p = ecma_get_string_from_value (*iter.current_value_p); // 2.a ecma_property_t *property_p = ecma_op_object_get_own_property (obj_p, property_name_p); // 2.b if (ecma_is_property_configurable (property_p)) { is_sealed = false; break; } } ecma_free_values_collection (props_p, true); } // 4. ret_value = ecma_make_simple_value (is_sealed ? ECMA_SIMPLE_VALUE_TRUE : ECMA_SIMPLE_VALUE_FALSE); } return ret_value; } /* ecma_builtin_object_object_is_sealed */ /** * The Object object's 'isFrozen' routine * * See also: * ECMA-262 v5, 15.2.3.12 * * @return ecma value * Returned value must be freed with ecma_free_value. */ static ecma_value_t ecma_builtin_object_object_is_frozen (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */ ecma_value_t arg) /**< routine's argument */ { ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY); // 1. if (!ecma_is_value_object (arg)) { ret_value = ecma_raise_type_error (""); } else { ecma_object_t *obj_p = ecma_get_object_from_value (arg); bool is_frozen; // 3. if (ecma_get_object_extensible (obj_p)) { is_frozen = false; } else { is_frozen = true; // 2. ecma_collection_header_t *props_p = ecma_op_object_get_property_names (obj_p, false, false, false); ecma_collection_iterator_t iter; ecma_collection_iterator_init (&iter, props_p); while (ecma_collection_iterator_next (&iter)) { ecma_string_t *property_name_p = ecma_get_string_from_value (*iter.current_value_p); // 2.a ecma_property_t *property_p = ecma_op_object_get_own_property (obj_p, property_name_p); JERRY_ASSERT (property_p->type == ECMA_PROPERTY_NAMEDDATA || property_p->type == ECMA_PROPERTY_NAMEDACCESSOR); // 2.b if (property_p->type == ECMA_PROPERTY_NAMEDDATA && ecma_is_property_writable (property_p)) { is_frozen = false; break; } // 2.c if (ecma_is_property_configurable (property_p)) { is_frozen = false; break; } } ecma_free_values_collection (props_p, true); } // 4. ret_value = ecma_make_simple_value (is_frozen ? ECMA_SIMPLE_VALUE_TRUE : ECMA_SIMPLE_VALUE_FALSE); } return ret_value; } /* ecma_builtin_object_object_is_frozen */ /** * The Object object's 'isExtensible' routine * * See also: * ECMA-262 v5, 15.2.3.13 * * @return ecma value * Returned value must be freed with ecma_free_value. */ static ecma_value_t ecma_builtin_object_object_is_extensible (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */ ecma_value_t arg) /**< routine's argument */ { ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY); if (!ecma_is_value_object (arg)) { ret_value = ecma_raise_type_error (""); } else { ecma_object_t *obj_p = ecma_get_object_from_value (arg); bool extensible = ecma_get_object_extensible (obj_p); ret_value = ecma_make_simple_value (extensible ? ECMA_SIMPLE_VALUE_TRUE : ECMA_SIMPLE_VALUE_FALSE); } return ret_value; } /* ecma_builtin_object_object_is_extensible */ /** * The Object object's 'keys' routine * * See also: * ECMA-262 v5, 15.2.3.14 * * @return ecma value * Returned value must be freed with ecma_free_value. */ static ecma_value_t ecma_builtin_object_object_keys (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */ ecma_value_t arg) /**< routine's argument */ { ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY); if (!ecma_is_value_object (arg)) { /* 1. */ ret_value = ecma_raise_type_error (""); } else { ecma_object_t *obj_p = ecma_get_object_from_value (arg); /* 3-6. */ ret_value = ecma_builtin_helper_object_get_properties (obj_p, true); } return ret_value; } /* ecma_builtin_object_object_keys */ /** * The Object object's 'getOwnPropertyDescriptor' routine * * See also: * ECMA-262 v5, 15.2.3.3 * * @return ecma value * Returned value must be freed with ecma_free_value. */ static ecma_value_t ecma_builtin_object_object_get_own_property_descriptor (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */ ecma_value_t arg1, /**< routine's first argument */ ecma_value_t arg2) /**< routine's second argument */ { ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY); // 1. if (!ecma_is_value_object (arg1)) { ret_value = ecma_raise_type_error (""); return ret_value; } ecma_object_t *obj_p = ecma_get_object_from_value (arg1); // 2. ECMA_TRY_CATCH (name_str_value, ecma_op_to_string (arg2), ret_value); ecma_string_t *name_str_p = ecma_get_string_from_value (name_str_value); // 3. ecma_property_t *prop_p = ecma_op_object_get_own_property (obj_p, name_str_p); if (prop_p != NULL) { ecma_property_descriptor_t prop_desc = ecma_get_property_descriptor_from_property (prop_p); // 4. ecma_object_t *desc_obj_p = ecma_op_from_property_descriptor (&prop_desc); ecma_free_property_descriptor (&prop_desc); ret_value = ecma_make_object_value (desc_obj_p); } else { ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED); } ECMA_FINALIZE (name_str_value); return ret_value; } /* ecma_builtin_object_object_get_own_property_descriptor */ /** * The Object object's 'create' routine * * See also: * ECMA-262 v5, 15.2.3.5 * * @return ecma value * Returned value must be freed with ecma_free_value. */ static ecma_value_t ecma_builtin_object_object_create (ecma_value_t this_arg, /**< 'this' argument */ ecma_value_t arg1, /**< routine's first argument */ ecma_value_t arg2) /**< routine's second argument */ { ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY); // 1. if (!ecma_is_value_object (arg1) && !ecma_is_value_null (arg1)) { ret_value = ecma_raise_type_error (""); } else { ecma_object_t *obj_p = NULL; if (!ecma_is_value_null (arg1)) { obj_p = ecma_get_object_from_value (arg1); } // 2-3. ecma_object_t *result_obj_p = ecma_op_create_object_object_noarg_and_set_prototype (obj_p); // 4. if (!ecma_is_value_undefined (arg2)) { ECMA_TRY_CATCH (obj, ecma_builtin_object_object_define_properties (this_arg, ecma_make_object_value (result_obj_p), arg2), ret_value); ECMA_FINALIZE (obj); } // 5. if (ecma_is_value_empty (ret_value)) { ret_value = ecma_copy_value (ecma_make_object_value (result_obj_p), true); } ecma_deref_object (result_obj_p); } return ret_value; } /* ecma_builtin_object_object_create */ /** * The Object object's 'defineProperties' routine * * See also: * ECMA-262 v5, 15.2.3.7 * * @return ecma value * Returned value must be freed with ecma_free_value. */ static ecma_value_t ecma_builtin_object_object_define_properties (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */ ecma_value_t arg1, /**< routine's first argument */ ecma_value_t arg2) /**< routine's second argument */ { ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY); // 1. if (!ecma_is_value_object (arg1)) { ret_value = ecma_raise_type_error (""); } else { ecma_object_t *obj_p = ecma_get_object_from_value (arg1); // 2. ECMA_TRY_CATCH (props, ecma_op_to_object (arg2), ret_value); ecma_object_t *props_p = ecma_get_object_from_value (props); // 3. ecma_collection_header_t *prop_names_p = ecma_op_object_get_property_names (props_p, false, true, false); uint32_t property_number = prop_names_p->unit_number; ecma_collection_iterator_t iter; ecma_collection_iterator_init (&iter, prop_names_p); // 4. MEM_DEFINE_LOCAL_ARRAY (property_descriptors, property_number, ecma_property_descriptor_t); uint32_t property_descriptor_number = 0; while (ecma_collection_iterator_next (&iter) && ecma_is_value_empty (ret_value)) { // 5.a ECMA_TRY_CATCH (desc_obj, ecma_op_object_get (props_p, ecma_get_string_from_value (*iter.current_value_p)), ret_value); // 5.b ECMA_TRY_CATCH (conv_result, ecma_op_to_property_descriptor (desc_obj, &property_descriptors[property_descriptor_number]), ret_value); property_descriptor_number++; ECMA_FINALIZE (conv_result); ECMA_FINALIZE (desc_obj); } // 6. ecma_collection_iterator_init (&iter, prop_names_p); for (uint32_t index = 0; index < property_number && ecma_is_value_empty (ret_value); index++) { bool is_next = ecma_collection_iterator_next (&iter); JERRY_ASSERT (is_next); ECMA_TRY_CATCH (define_own_prop_ret, ecma_op_object_define_own_property (obj_p, ecma_get_string_from_value (*iter.current_value_p), &property_descriptors[index], true), ret_value); ECMA_FINALIZE (define_own_prop_ret); } // Clean up for (uint32_t index = 0; index < property_descriptor_number; index++) { ecma_free_property_descriptor (&property_descriptors[index]); } MEM_FINALIZE_LOCAL_ARRAY (property_descriptors); ecma_free_values_collection (prop_names_p, true); // 7. if (ecma_is_value_empty (ret_value)) { ret_value = ecma_copy_value (arg1, true); } ECMA_FINALIZE (props); } return ret_value; } /* ecma_builtin_object_object_define_properties */ /** * The Object object's 'defineProperty' routine * * See also: * ECMA-262 v5, 15.2.3.6 * * @return ecma value * Returned value must be freed with ecma_free_value. */ static ecma_value_t ecma_builtin_object_object_define_property (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */ ecma_value_t arg1, /**< routine's first argument */ ecma_value_t arg2, /**< routine's second argument */ ecma_value_t arg3) /**< routine's third argument */ { ecma_value_t ret_value = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY); if (!ecma_is_value_object (arg1)) { ret_value = ecma_raise_type_error (""); } else { ecma_object_t *obj_p = ecma_get_object_from_value (arg1); ECMA_TRY_CATCH (name_str_value, ecma_op_to_string (arg2), ret_value); ecma_string_t *name_str_p = ecma_get_string_from_value (name_str_value); ecma_property_descriptor_t prop_desc; ECMA_TRY_CATCH (conv_result, ecma_op_to_property_descriptor (arg3, &prop_desc), ret_value); ECMA_TRY_CATCH (define_own_prop_ret, ecma_op_object_define_own_property (obj_p, name_str_p, &prop_desc, true), ret_value); ret_value = ecma_copy_value (arg1, true); ECMA_FINALIZE (define_own_prop_ret); ecma_free_property_descriptor (&prop_desc); ECMA_FINALIZE (conv_result); ECMA_FINALIZE (name_str_value); } return ret_value; } /* ecma_builtin_object_object_define_property */ /** * @} * @} * @} */