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#define NOPLAN9DEFINES
#include <u.h>
#include <libc.h>
#include <stdlib.h> /* setenv etc. */
#include <time.h>
static int
dotz(time_t t, char *tzone)
{
struct tm *gtm;
struct tm tm;
strftime(tzone, 32, "%Z", localtime(&t));
tm = *localtime(&t); /* set local time zone field */
gtm = gmtime(&t);
tm.tm_sec = gtm->tm_sec;
tm.tm_min = gtm->tm_min;
tm.tm_hour = gtm->tm_hour;
tm.tm_mday = gtm->tm_mday;
tm.tm_mon = gtm->tm_mon;
tm.tm_year = gtm->tm_year;
tm.tm_wday = gtm->tm_wday;
return t - mktime(&tm);
}
static void
tm2Tm(struct tm *tm, Tm *bigtm, int tzoff, char *zone)
{
memset(bigtm, 0, sizeof *bigtm);
bigtm->sec = tm->tm_sec;
bigtm->min = tm->tm_min;
bigtm->hour = tm->tm_hour;
bigtm->mday = tm->tm_mday;
bigtm->mon = tm->tm_mon;
bigtm->year = tm->tm_year;
bigtm->wday = tm->tm_wday;
bigtm->tzoff = tzoff;
strncpy(bigtm->zone, zone, 3);
bigtm->zone[3] = 0;
}
static void
Tm2tm(Tm *bigtm, struct tm *tm)
{
/* initialize with current time to get local time zone! (tm_isdst) */
time_t t;
time(&t);
*tm = *localtime(&t);
tm->tm_sec = bigtm->sec;
tm->tm_min = bigtm->min;
tm->tm_hour = bigtm->hour;
tm->tm_mday = bigtm->mday;
tm->tm_mon = bigtm->mon;
tm->tm_year = bigtm->year;
tm->tm_wday = bigtm->wday;
}
Tm*
p9gmtime(long x)
{
time_t t;
struct tm tm;
static Tm bigtm;
t = (time_t)x;
tm = *gmtime(&t);
tm2Tm(&tm, &bigtm, 0, "GMT");
return &bigtm;
}
Tm*
p9localtime(long x)
{
time_t t;
struct tm tm;
static Tm bigtm;
char tzone[32];
t = (time_t)x;
tm = *localtime(&t);
tm2Tm(&tm, &bigtm, dotz(t, tzone), tzone);
return &bigtm;
}
long
p9tm2sec(Tm *bigtm)
{
time_t t;
struct tm tm;
char tzone[32];
Tm2tm(bigtm, &tm);
t = mktime(&tm);
if(strcmp(bigtm->zone, "GMT") == 0 || strcmp(bigtm->zone, "UCT") == 0){
t += dotz(t, tzone);
}
return t;
}
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