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102 lines
3.6 KiB
C
102 lines
3.6 KiB
C
/* Copyright 2014-2015 Samsung Electronics Co., Ltd.
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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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#ifndef ECMA_TRY_CATCH_MACRO_H
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#define ECMA_TRY_CATCH_MACRO_H
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#include "ecma-helpers.h"
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/**
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* The macro defines try-block that initializes variable 'var' with 'op'
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* and checks for exceptions that might be thrown during initialization.
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*
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* If no exception was thrown, then code after the try-block is executed.
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* Otherwise, throw-completion value is just copied to return_value.
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*
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* Note:
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* Each ECMA_TRY_CATCH should have it's own corresponding ECMA_FINALIZE
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* statement with same argument as corresponding ECMA_TRY_CATCH's first argument.
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*/
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#define ECMA_TRY_CATCH(var, op, return_value) \
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JERRY_ASSERT (return_value == ecma_make_empty_completion_value ()); \
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ecma_completion_value_t var ## _completion = op; \
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if (unlikely (ecma_is_completion_value_throw (var ## _completion))) \
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{ \
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return_value = var ## _completion; \
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} \
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else \
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{ \
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JERRY_ASSERT (ecma_is_completion_value_normal (var ## _completion)); \
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\
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ecma_value_t var __attr_unused___ = ecma_get_completion_value_value (var ## _completion)
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/**
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* The macro marks end of code block that is defined by corresponding
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* ECMA_TRY_CATCH and frees variable, initialized by the ECMA_TRY_CATCH.
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*
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* Note:
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* Each ECMA_TRY_CATCH should be followed by ECMA_FINALIZE with same argument
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* as corresponding ECMA_TRY_CATCH's first argument.
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*/
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#define ECMA_FINALIZE(var) ecma_free_completion_value (var ## _completion); \
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}
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/**
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* The macro defines try-block that tries to perform ToNumber operation on given value
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* and checks for exceptions that might be thrown during the operation.
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*
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* If no exception was thrown, then code after the try-block is executed.
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* Otherwise, throw-completion value is just copied to return_value.
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*
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* Note:
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* Each ECMA_OP_TO_NUMBER_TRY_CATCH should have it's own corresponding ECMA_OP_TO_NUMBER_FINALIZE
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* statement with same argument as corresponding ECMA_OP_TO_NUMBER_TRY_CATCH's first argument.
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*/
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#define ECMA_OP_TO_NUMBER_TRY_CATCH(num_var, value, return_value) \
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JERRY_ASSERT (ecma_is_completion_value_empty (return_value)); \
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ecma_number_t num_var = ecma_number_make_nan (); \
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if (ecma_is_value_number (value)) \
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{ \
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num_var = *ecma_get_number_from_value (value); \
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} \
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else \
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{ \
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ECMA_TRY_CATCH (to_number_value, \
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ecma_op_to_number (value), \
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return_value); \
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\
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num_var = *ecma_get_number_from_value (to_number_value); \
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\
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ECMA_FINALIZE (to_number_value); \
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} \
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\
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if (ecma_is_completion_value_empty (return_value)) \
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{
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/**
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* The macro marks end of code block that is defined by corresponding ECMA_OP_TO_NUMBER_TRY_CATCH.
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*
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* Note:
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* Each ECMA_OP_TO_NUMBER_TRY_CATCH should be followed by ECMA_OP_TO_NUMBER_FINALIZE
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* with same argument as corresponding ECMA_OP_TO_NUMBER_TRY_CATCH's first argument.
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*/
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#define ECMA_OP_TO_NUMBER_FINALIZE(num_var) } \
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else \
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{ \
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JERRY_ASSERT (ecma_number_is_nan (num_var)); \
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}
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#endif /* !ECMA_TRY_CATCH_MACRO_H */
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