mirror of
https://github.com/jerryscript-project/jerryscript.git
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0511091e8a
Since the project is now hosted at the JS Foundation we can move to unified copyright notices for the project. Starting with this commit all future contributions to the project should only carry the following copyright notice (except for third-party code which requires copyright information to be preserved): "Copyright JS Foundation and other contributors, http://js.foundation" (without the quotes) This avoids cluttering the codebase with contributor-specific copyright notices which have a higher maintenance overhead and tend to get outdated quickly. Also dropping the year from the copyright notices helps to avoid yearly code changes just to update the copyright notices. Note that each contributor still retains full copyright ownership of his/her contributions and the respective authorship is tracked very accurately via Git. JerryScript-DCO-1.0-Signed-off-by: Tilmann Scheller t.scheller@samsung.com
133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
/* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "ecma-exceptions.h"
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#include "ecma-function-object.h"
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#include "ecma-gc.h"
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#include "ecma-globals.h"
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#include "ecma-helpers.h"
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#include "ecma-lcache.h"
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#include "ecma-lex-env.h"
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#include "ecma-objects.h"
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#include "ecma-reference.h"
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#include "jrt.h"
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/** \addtogroup ecma ECMA
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* @{
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*
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* \addtogroup references ECMA-Reference
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* @{
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*/
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/**
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* Resolve syntactic reference.
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*
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* @return if reference was resolved successfully,
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* pointer to lexical environment - reference's base,
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* else - NULL.
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*/
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ecma_object_t *
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ecma_op_resolve_reference_base (ecma_object_t *lex_env_p, /**< starting lexical environment */
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ecma_string_t *name_p) /**< identifier's name */
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{
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JERRY_ASSERT (lex_env_p != NULL);
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ecma_object_t *lex_env_iter_p = lex_env_p;
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while (lex_env_iter_p != NULL)
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{
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if (ecma_op_has_binding (lex_env_iter_p, name_p))
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{
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return lex_env_iter_p;
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}
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lex_env_iter_p = ecma_get_lex_env_outer_reference (lex_env_iter_p);
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}
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return NULL;
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} /* ecma_op_resolve_reference_base */
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/**
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* Resolve value corresponding to reference.
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*
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* @return value of the reference
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*/
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ecma_value_t
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ecma_op_resolve_reference_value (ecma_object_t *lex_env_p, /**< starting lexical environment */
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ecma_string_t *name_p) /**< identifier's name */
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{
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JERRY_ASSERT (lex_env_p != NULL);
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while (lex_env_p != NULL)
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{
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if (ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_DECLARATIVE)
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{
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ecma_property_t *property_p = ecma_find_named_property (lex_env_p, name_p);
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if (property_p != NULL)
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{
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return ecma_fast_copy_value (ECMA_PROPERTY_VALUE_PTR (property_p)->value);
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}
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}
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else
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{
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JERRY_ASSERT (ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_OBJECT_BOUND
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|| ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_THIS_OBJECT_BOUND);
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ecma_object_t *binding_obj_p = ecma_get_lex_env_binding_object (lex_env_p);
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ecma_property_t *property_p = ecma_lcache_lookup (binding_obj_p, name_p);
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if (property_p != NULL)
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{
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ecma_property_value_t *prop_value_p = ECMA_PROPERTY_VALUE_PTR (property_p);
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if (ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDDATA)
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{
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return ecma_fast_copy_value (prop_value_p->value);
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}
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JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDACCESSOR);
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ecma_object_t *getter_p = ecma_get_named_accessor_property_getter (prop_value_p);
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if (getter_p == NULL)
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{
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return ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED);
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}
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ecma_value_t base_value = ecma_make_object_value (binding_obj_p);
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return ecma_op_function_call (getter_p, base_value, NULL, 0);
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}
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ecma_value_t prop_value = ecma_op_object_find (binding_obj_p, name_p);
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if (ecma_is_value_found (prop_value))
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{
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return prop_value;
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}
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}
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lex_env_p = ecma_get_lex_env_outer_reference (lex_env_p);
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}
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return ecma_raise_reference_error (ECMA_ERR_MSG ("Cannot resolve reference."));
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} /* ecma_op_resolve_reference_value */
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/**
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* @}
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* @}
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*/
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