From 4abab5ad6c8465a7528ccdd5f49367da05f78bbd Mon Sep 17 00:00:00 2001 From: Vladimir Azarov Date: Tue, 1 Oct 2024 15:47:05 +0200 Subject: Initial version --- src/time/mktime.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 src/time/mktime.c (limited to 'src/time/mktime.c') diff --git a/src/time/mktime.c b/src/time/mktime.c new file mode 100644 index 0000000..bad3f07 --- /dev/null +++ b/src/time/mktime.c @@ -0,0 +1,28 @@ +#include "time_impl.h" +#include + +time_t mktime(struct tm *tm) +{ + struct tm new; + long opp; + long long t = __tm_to_secs(tm); + + __secs_to_zone(t, 1, &new.tm_isdst, &new.__tm_gmtoff, &opp, &new.__tm_zone); + + if (tm->tm_isdst>=0 && new.tm_isdst!=tm->tm_isdst) + t -= opp - new.__tm_gmtoff; + + t -= new.__tm_gmtoff; + if ((time_t)t != t) goto error; + + __secs_to_zone(t, 0, &new.tm_isdst, &new.__tm_gmtoff, &opp, &new.__tm_zone); + + if (__secs_to_tm(t + new.__tm_gmtoff, &new) < 0) goto error; + + *tm = new; + return t; + +error: + errno = EOVERFLOW; + return -1; +} -- cgit v1.2.3