o5r/plan9port
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

localtime: use correct time zone more often (Michael Teichgräber)

Browse source
This commit is contained in:
Russ Cox 2008-05-06 14:45:39 -04:00
parent 865e8b0fb3
commit 57ce0d667e
1 changed files with 13 additions and 27 deletions
Download patch file Download diff file Expand all files Collapse all files

40
src/lib9/date.c
View file

@ -4,22 +4,13 @@
#include <stdlib.h> /* setenv etc. */
#include <time.h>
static int didtz;
static int tzdelta;
static char tzone[32];
static void
dotz(void)
static int
dotz(time_t t, char *tzone)
{
time_t t;
struct tm *gtm;
struct tm tm;
if(didtz)
return;
didtz = 1;
t = time(0);
strftime(tzone, sizeof tzone, "%Z", localtime(&t));
strftime(tzone, 32, "%Z", localtime(&t));
tm = *localtime(&t); /* set local time zone field */
gtm = gmtime(&t);
tm.tm_sec = gtm->tm_sec;
@ -29,11 +20,11 @@ dotz(void)
tm.tm_mon = gtm->tm_mon;
tm.tm_year = gtm->tm_year;
tm.tm_wday = gtm->tm_wday;
tzdelta = t - mktime(&tm);
return t - mktime(&tm);
}
static void
tm2Tm(struct tm *tm, Tm *bigtm, int gmt)
tm2Tm(struct tm *tm, Tm *bigtm, int tzoff, char *zone)
{
memset(bigtm, 0, sizeof *bigtm);
bigtm->sec = tm->tm_sec;
@ -43,15 +34,9 @@ tm2Tm(struct tm *tm, Tm *bigtm, int gmt)
bigtm->mon = tm->tm_mon;
bigtm->year = tm->tm_year;
bigtm->wday = tm->tm_wday;
if(gmt){
strcpy(bigtm->zone, "GMT");
bigtm->tzoff = 0;
}else{
dotz();
strncpy(bigtm->zone, tzone, 3);
bigtm->zone[3] = 0;
bigtm->tzoff = tzdelta;
}
bigtm->tzoff = tzoff;
strncpy(bigtm->zone, zone, 3);
bigtm->zone[3] = 0;
}
static void
@ -80,7 +65,7 @@ p9gmtime(long x)
t = (time_t)x;
tm = *gmtime(&t);
tm2Tm(&tm, &bigtm, 1);
tm2Tm(&tm, &bigtm, 0, "GMT");
return &bigtm;
}
@ -90,10 +75,11 @@ 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, 0);
tm2Tm(&tm, &bigtm, dotz(t, tzone), tzone);
return &bigtm;
}
@ -102,12 +88,12 @@ 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){
dotz();
t += tzdelta;
t += dotz(t, tzone);
}
return t;
}