Kev Mann / mbed-dev-OS5_10_4

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platform/mbed_preprocessor.h@0:38ceb79fef03, 2018-11-28 (annotated)

Committer:
kevman
Date:
Wed Nov 28 15:10:15 2018 +0000
Revision:
0:38ceb79fef03
RTC modified

Who changed what in which revision?

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kevman 0:38ceb79fef03 1 /** \addtogroup platform */
kevman 0:38ceb79fef03 2 /** @{*/
kevman 0:38ceb79fef03 3 /**
kevman 0:38ceb79fef03 4 * \defgroup platform_preprocessor preprocessor macros
kevman 0:38ceb79fef03 5 * @{
kevman 0:38ceb79fef03 6 */
kevman 0:38ceb79fef03 7
kevman 0:38ceb79fef03 8 /* mbed Microcontroller Library
kevman 0:38ceb79fef03 9 * Copyright (c) 2006-2013 ARM Limited
kevman 0:38ceb79fef03 10 *
kevman 0:38ceb79fef03 11 * Licensed under the Apache License, Version 2.0 (the "License");
kevman 0:38ceb79fef03 12 * you may not use this file except in compliance with the License.
kevman 0:38ceb79fef03 13 * You may obtain a copy of the License at
kevman 0:38ceb79fef03 14 *
kevman 0:38ceb79fef03 15 * http://www.apache.org/licenses/LICENSE-2.0
kevman 0:38ceb79fef03 16 *
kevman 0:38ceb79fef03 17 * Unless required by applicable law or agreed to in writing, software
kevman 0:38ceb79fef03 18 * distributed under the License is distributed on an "AS IS" BASIS,
kevman 0:38ceb79fef03 19 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kevman 0:38ceb79fef03 20 * See the License for the specific language governing permissions and
kevman 0:38ceb79fef03 21 * limitations under the License.
kevman 0:38ceb79fef03 22 */
kevman 0:38ceb79fef03 23 #ifndef MBED_PREPROCESSOR_H
kevman 0:38ceb79fef03 24 #define MBED_PREPROCESSOR_H
kevman 0:38ceb79fef03 25
kevman 0:38ceb79fef03 26
kevman 0:38ceb79fef03 27 /** MBED_CONCAT
kevman 0:38ceb79fef03 28 * Concatenate tokens together
kevman 0:38ceb79fef03 29 *
kevman 0:38ceb79fef03 30 * @note
kevman 0:38ceb79fef03 31 * Expands tokens before concatenation
kevman 0:38ceb79fef03 32 *
kevman 0:38ceb79fef03 33 * @code
kevman 0:38ceb79fef03 34 * // Creates a unique label based on the line number
kevman 0:38ceb79fef03 35 * int MBED_CONCAT(UNIQUE_LABEL_, __LINE__) = 1;
kevman 0:38ceb79fef03 36 * @endcode
kevman 0:38ceb79fef03 37 */
kevman 0:38ceb79fef03 38 #define MBED_CONCAT(a, b) MBED_CONCAT_(a, b)
kevman 0:38ceb79fef03 39 #define MBED_CONCAT_(a, b) a##b
kevman 0:38ceb79fef03 40
kevman 0:38ceb79fef03 41 /** MBED_STRINGIFY
kevman 0:38ceb79fef03 42 * Converts tokens into strings
kevman 0:38ceb79fef03 43 *
kevman 0:38ceb79fef03 44 * @note
kevman 0:38ceb79fef03 45 * Expands tokens before stringification
kevman 0:38ceb79fef03 46 *
kevman 0:38ceb79fef03 47 * @code
kevman 0:38ceb79fef03 48 * // Creates a string based on the parameters
kevman 0:38ceb79fef03 49 * const char *c = MBED_STRINGIFY(This is a ridiculous way to create a string)
kevman 0:38ceb79fef03 50 * @endcode
kevman 0:38ceb79fef03 51 */
kevman 0:38ceb79fef03 52 #define MBED_STRINGIFY(a) MBED_STRINGIFY_(a)
kevman 0:38ceb79fef03 53 #define MBED_STRINGIFY_(a) #a
kevman 0:38ceb79fef03 54
kevman 0:38ceb79fef03 55 /** MBED_STRLEN
kevman 0:38ceb79fef03 56 * Reports string token length
kevman 0:38ceb79fef03 57 *
kevman 0:38ceb79fef03 58 * @note
kevman 0:38ceb79fef03 59 * Expands tokens before calculating length
kevman 0:38ceb79fef03 60 *
kevman 0:38ceb79fef03 61 * @code
kevman 0:38ceb79fef03 62 * // Get string length
kevman 0:38ceb79fef03 63 * const int len = MBED_STRLEN("Get the length")
kevman 0:38ceb79fef03 64 * @endcode
kevman 0:38ceb79fef03 65 */
kevman 0:38ceb79fef03 66 #define MBED_STRLEN(a) MBED_STRLEN_(a)
kevman 0:38ceb79fef03 67 #define MBED_STRLEN_(a) (sizeof(a) - 1)
kevman 0:38ceb79fef03 68
kevman 0:38ceb79fef03 69 /** MBED_COUNT_VA_ARGS(...)
kevman 0:38ceb79fef03 70 * Reports number of tokens passed
kevman 0:38ceb79fef03 71 *
kevman 0:38ceb79fef03 72 * @note
kevman 0:38ceb79fef03 73 * Token limit is 16
kevman 0:38ceb79fef03 74 *
kevman 0:38ceb79fef03 75 * @code
kevman 0:38ceb79fef03 76 * // Get number of arguments
kevman 0:38ceb79fef03 77 * const int count = MBED_COUNT_VA_ARGS("Address 0x%x, Data[0] = %d Data[1] = %d", 0x20001234, 10, 20)
kevman 0:38ceb79fef03 78 * @endcode
kevman 0:38ceb79fef03 79 */
kevman 0:38ceb79fef03 80 #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)
kevman 0:38ceb79fef03 81 #define GET_NTH_ARG_(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, N, ...) N
kevman 0:38ceb79fef03 82
kevman 0:38ceb79fef03 83 #endif
kevman 0:38ceb79fef03 84
kevman 0:38ceb79fef03 85 /** @}*/
kevman 0:38ceb79fef03 86 /** @}*/