build_defs.h

/*
 * build_defs.h
 *
 *  Created on: May 17, 2018
 *      Author: steveha from stackoverflow.com
 *         URL: https://stackoverflow.com/questions/11697820/how-to-use-date-and-time-predefined-macros-in-as-two-integers-then-stri
 */

#ifndef BUILD_DEFS_H_
#define BUILD_DEFS_H_

// Example of __DATE__ string: "Jul 27 2012"
// Example of __TIME__ string: "21:06:19"

#define COMPUTE_BUILD_YEAR \
    ( \
        (__DATE__[ 9] - '0') *   10 + \
        (__DATE__[10] - '0') \
    )

#define COMPUTE_BUILD_DAY \
    ( \
        ((__DATE__[4] >= '0') ? (__DATE__[4] - '0') * 10 : 0) + \
        (__DATE__[5] - '0') \
    )

#define BUILD_MONTH_IS_JAN (__DATE__[0] == 'J' && __DATE__[1] == 'a' && __DATE__[2] == 'n')
#define BUILD_MONTH_IS_FEB (__DATE__[0] == 'F')
#define BUILD_MONTH_IS_MAR (__DATE__[0] == 'M' && __DATE__[1] == 'a' && __DATE__[2] == 'r')
#define BUILD_MONTH_IS_APR (__DATE__[0] == 'A' && __DATE__[1] == 'p')
#define BUILD_MONTH_IS_MAY (__DATE__[0] == 'M' && __DATE__[1] == 'a' && __DATE__[2] == 'y')
#define BUILD_MONTH_IS_JUN (__DATE__[0] == 'J' && __DATE__[1] == 'u' && __DATE__[2] == 'n')
#define BUILD_MONTH_IS_JUL (__DATE__[0] == 'J' && __DATE__[1] == 'u' && __DATE__[2] == 'l')
#define BUILD_MONTH_IS_AUG (__DATE__[0] == 'A' && __DATE__[1] == 'u')
#define BUILD_MONTH_IS_SEP (__DATE__[0] == 'S')
#define BUILD_MONTH_IS_OCT (__DATE__[0] == 'O')
#define BUILD_MONTH_IS_NOV (__DATE__[0] == 'N')
#define BUILD_MONTH_IS_DEC (__DATE__[0] == 'D')

#define COMPUTE_BUILD_MONTH \
    ( \
        (BUILD_MONTH_IS_JAN) ?  1 : \
        (BUILD_MONTH_IS_FEB) ?  2 : \
        (BUILD_MONTH_IS_MAR) ?  3 : \
        (BUILD_MONTH_IS_APR) ?  4 : \
        (BUILD_MONTH_IS_MAY) ?  5 : \
        (BUILD_MONTH_IS_JUN) ?  6 : \
        (BUILD_MONTH_IS_JUL) ?  7 : \
        (BUILD_MONTH_IS_AUG) ?  8 : \
        (BUILD_MONTH_IS_SEP) ?  9 : \
        (BUILD_MONTH_IS_OCT) ? 10 : \
        (BUILD_MONTH_IS_NOV) ? 11 : \
        (BUILD_MONTH_IS_DEC) ? 12 : \
        /* error default */  99 \
    )

#define COMPUTE_BUILD_HOUR ((__TIME__[0] - '0') * 10 + __TIME__[1] - '0')
#define COMPUTE_BUILD_MIN  ((__TIME__[3] - '0') * 10 + __TIME__[4] - '0')
#define COMPUTE_BUILD_SEC  ((__TIME__[6] - '0') * 10 + __TIME__[7] - '0')

#define BUILD_DATE_IS_BAD (__DATE__[0] == '?')

#define BUILD_YEAR  ((BUILD_DATE_IS_BAD) ? 99 : COMPUTE_BUILD_YEAR)
#define BUILD_MONTH ((BUILD_DATE_IS_BAD) ? 99 : COMPUTE_BUILD_MONTH)
#define BUILD_DAY   ((BUILD_DATE_IS_BAD) ? 99 : COMPUTE_BUILD_DAY)

#define BUILD_TIME_IS_BAD (__TIME__[0] == '?')

#define BUILD_HOUR  ((BUILD_TIME_IS_BAD) ? 99 :  COMPUTE_BUILD_HOUR)
#define BUILD_MIN   ((BUILD_TIME_IS_BAD) ? 99 :  COMPUTE_BUILD_MIN)
#define BUILD_SEC   ((BUILD_TIME_IS_BAD) ? 99 :  COMPUTE_BUILD_SEC)

#endif /* BUILD_DEFS_H_ */