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