Compile-time date parser, converts `__DATE__` to ints

date_parse.c

#include <stdio.h>

#define pp_current_build_year (((__DATE__[7] - '0') * 1000) + ((__DATE__[8] - '0') * 100) + ((__DATE__[9] - '0') * 10) + (__DATE__[10] - '0'))
#define pp_current_build_day ((((__DATE__[4] - ' ') % 16) * 10) + (__DATE__[5] - '0'))
#define MONTH_CMP(b) ((__DATE__[0] == (b)[0]) && (__DATE__[1] == (b)[1]) && (__DATE__[2] == (b)[2]))
#define pp_current_build_month (  \
	(MONTH_CMP("Jan")*( 1)) + \
	(MONTH_CMP("Feb")*( 2)) + \
	(MONTH_CMP("Mar")*( 3)) + \
	(MONTH_CMP("Apr")*( 4)) + \
	(MONTH_CMP("May")*( 5)) + \
	(MONTH_CMP("Jun")*( 6)) + \
	(MONTH_CMP("Jul")*( 7)) + \
	(MONTH_CMP("Aug")*( 8)) + \
	(MONTH_CMP("Sep")*( 9)) + \
	(MONTH_CMP("Oct")*(10)) + \
	(MONTH_CMP("Nov")*(11)) + \
	(MONTH_CMP("Dec")*(12))   \
)
#define pp_current_build_hour (((__TIME__[0] - '0') * 10) + (__TIME__[1] - '0'))
#define pp_current_build_min (((__TIME__[3] - '0') * 10) + (__TIME__[4] - '0'))
#define pp_current_build_sec (((__TIME__[6] - '0') * 10) + (__TIME__[7] - '0'))

int main(void){
	printf("%d\n", pp_current_build_year);
	printf("%d\n", pp_current_build_month);
	printf("%d\n", pp_current_build_day);
	printf("%d\n", pp_current_build_hour);
	printf("%d\n", pp_current_build_min);
	printf("%d\n", pp_current_build_sec);
	printf("%.2d-%.2d-%.2d %.2d:%.2d:%.2d UTC\n", pp_current_build_year, pp_current_build_month, pp_current_build_day, pp_current_build_hour, pp_current_build_min, pp_current_build_sec);
}