* See musl/COPYRIGHT for license information. */
#include <errno.h>
#include "../musl/time/time_impl.h"
static long __timezone = 0;
static int dst_off = 0;
const char __utc[] = "UTC";
static const char *__tzname[2] = { __utc, __utc };
static void
__secs_to_zone(long long t, int local, int *isdst, int *offset, long *oppoff, const char **zonename)
{
*isdst = 0;
*offset = -__timezone;
if (oppoff) *oppoff = -dst_off;
*zonename = __tzname[0];
}
struct tm *
__gmtime_r_fallback(const time_t *restrict t, struct tm *restrict tm)
{
if (__secs_to_tm(*t, tm) < 0) {
errno = EOVERFLOW;
return 0;
}
tm->tm_isdst = 0;
tm->__tm_gmtoff = 0;
tm->__tm_zone = __utc;
return tm;
}
time_t
__mktime_fallback(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;
}
time_t
__timegm_fallback(struct tm *tm)
{
struct tm new;
long long t = __tm_to_secs(tm);
if (__secs_to_tm(t, &new) < 0) {
errno = EOVERFLOW;
return -1;
}
*tm = new;
tm->tm_isdst = 0;
tm->__tm_gmtoff = 0;
tm->__tm_zone = __utc;
return t;
}
