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Added macro: 1. string length and 2. variable argument count

pull/5987/head
deepikabhavnani 2018-01-31 14:06:16 -06:00
parent c2784c8962
commit 3977249b54
1 changed files with 27 additions and 0 deletions
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27
platform/mbed_preprocessor.h
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@ -52,6 +52,33 @@
#define MBED_STRINGIFY(a) MBED_STRINGIFY_(a)
#define MBED_STRINGIFY_(a) #a
/** MBED_STRLEN
* Reports string token length
*
* @note
* Expands tokens before calculating length
*
* @code
* // Get string length
* const int len = MBED_STRLEN("Get the length")
* @endcode
*/
#define MBED_STRLEN(a) MBED_STRLEN_(a)
#define MBED_STRLEN_(a) (sizeof(a) - 1)
/** MBED_COUNT_VA_ARGS(...)
* Reports number of tokens passed
*
* @note
* Token limit is 16
*
* @code
* // Get number of arguments
* const int count = MBED_COUNT_VA_ARGS("Address 0x%x, Data[0] = %d Data[1] = %d", 0x20001234, 10, 20)
* @endcode
*/
#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)
#define GET_NTH_ARG_(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, N, ...) N
#endif