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Improve code clarity in get_gmtoff().

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Sam Hocevar 2017-09-06 18:19:57 +02:00
parent 79f2e14e22
commit 577a3be97a
1 changed files with 7 additions and 9 deletions
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16
rinetd.c
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@ -985,19 +985,17 @@ static int readArgs (int argc, char **argv, RinetdOptions *options)
/* get_gmtoff was borrowed from Apache. Thanks folks. */ /* get_gmtoff was borrowed from Apache. Thanks folks. */
static struct tm *get_gmtoff(int *tz) { static struct tm *get_gmtoff(int *tz)
{
time_t tt = time(NULL); time_t tt = time(NULL);
struct tm gmt;
struct tm *t;
int days, hours, minutes;
/* Assume we are never more than 24 hours away. */ /* Assume we are never more than 24 hours away. */
gmt = *gmtime(&tt); /* remember gmtime/localtime return ptr to static */ struct tm gmt = *gmtime(&tt); /* remember gmtime/localtime return ptr to static */
t = localtime(&tt); /* buffer... so be careful */ struct tm *t = localtime(&tt); /* buffer... so be careful */
days = t->tm_yday - gmt.tm_yday; int days = t->tm_yday - gmt.tm_yday;
hours = ((days < -1 ? 24 : 1 < days ? -24 : days * 24) int hours = ((days < -1 ? 24 : 1 < days ? -24 : days * 24)
+ t->tm_hour - gmt.tm_hour); + t->tm_hour - gmt.tm_hour);
minutes = hours * 60 + t->tm_min - gmt.tm_min; int minutes = hours * 60 + t->tm_min - gmt.tm_min;
*tz = minutes; *tz = minutes;
return t; return t;
} }