mirror of https://github.com/ARMmbed/mbed-os.git
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/** \addtogroup platform */
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/** @{*/
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/**
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* \defgroup platform_preprocessor preprocessor macros
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* @{
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*/
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/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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* SPDX-License-Identifier: Apache-2.0
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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 MBED_PREPROCESSOR_H
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#define MBED_PREPROCESSOR_H
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/** MBED_CONCAT
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* Concatenate tokens together
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*
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* @note
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* Expands tokens before concatenation
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*
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* @code
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* // Creates a unique label based on the line number
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* int MBED_CONCAT(UNIQUE_LABEL_, __LINE__) = 1;
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* @endcode
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*/
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#define MBED_CONCAT(a, b) MBED_CONCAT_(a, b)
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#define MBED_CONCAT_(a, b) a##b
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/** MBED_STRINGIFY
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* Converts tokens into strings
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*
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* @note
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* Expands tokens before stringification
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*
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* @code
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* // Creates a string based on the parameters
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* const char *c = MBED_STRINGIFY(This is a ridiculous way to create a string)
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* @endcode
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*/
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#define MBED_STRINGIFY(a) MBED_STRINGIFY_(a)
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#define MBED_STRINGIFY_(a) #a
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/** MBED_STRLEN
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* Reports string token length
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*
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* @note
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* Expands tokens before calculating length
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*
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* @code
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* // Get string length
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* const int len = MBED_STRLEN("Get the length")
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* @endcode
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*/
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#define MBED_STRLEN(a) MBED_STRLEN_(a)
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#define MBED_STRLEN_(a) (sizeof(a) - 1)
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/** MBED_COUNT_VA_ARGS(...)
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* Reports number of tokens passed
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*
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* @note
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* Token limit is 16
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*
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* @code
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* // Get number of arguments
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* const int count = MBED_COUNT_VA_ARGS("Address 0x%x, Data[0] = %d Data[1] = %d", 0x20001234, 10, 20)
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* @endcode
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*/
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#define MBED_COUNT_VA_ARGS(...) GET_NTH_ARG_(__VA_ARGS__, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1)
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#define GET_NTH_ARG_(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, N, ...) N
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#endif
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/** @}*/
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/** @}*/
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