the big time handling overhaul

[musl] / src / time / tzset.c

diff --git a/src/time/tzset.c b/src/time/tzset.c
deleted file mode 100644 (file)
index 7e836c2..0000000
--- a/src/time/tzset.c
+++ /dev/null
@@ -1,172 +0,0 @@
-#include <time.h>
-#include <ctype.h>
-#include <limits.h>
-#include <stdlib.h>
-#include <string.h>
-#include "libc.h"
-
-#include "__time.h"
-
-long  __timezone = 0;
-int   __daylight = 0;
-char *__tzname[2] = { 0, 0 };
-int   __dst_offset = 0;
-
-weak_alias(__timezone, timezone);
-weak_alias(__daylight, daylight);
-weak_alias(__tzname, tzname);
-
-static char std_name[TZNAME_MAX+1];
-static char dst_name[TZNAME_MAX+1];
-
-/* all elements are zero-based */
-static struct rule {
-       signed char month;
-       signed char week;
-       short day;
-       int time;
-} __dst_start, __dst_end;
-
-static void zname(char *d, char **s)
-{
-       int i;
-       for (i=0; i<TZNAME_MAX && isalpha(d[i]=**s); i++, (*s)++);
-       d[i] = 0;
-}
-
-static int hhmmss(char **s)
-{
-       int ofs = strtol(*s, s, 10)*3600;
-       if (ofs >= 0) {
-               if (**s == ':') ofs += strtol(*s+1, s, 10)*60;
-               if (**s == ':') ofs += strtol(*s+1, s, 10);
-       } else {
-               if (**s == ':') ofs -= strtol(*s+1, s, 10)*60;
-               if (**s == ':') ofs -= strtol(*s+1, s, 10);
-       }
-       return ofs;
-}
-
-static int dstrule(struct rule *rule, char **s)
-{
-       if (**s != ',') return -1;
-       switch (*++*s) {
-       case 'J':
-               rule->month = 'J';
-               rule->day = strtol(*s+1, s, 10)-1;
-               break;
-       case 'M':
-               rule->month = strtol(*s+1, s, 10)-1;
-               if (**s != '.' || rule->month < 0 || rule->month > 11)
-                       return -1;
-               rule->week = strtol(*s+1, s, 10)-1;
-               if (**s != '.' || rule->week < 0 || rule->week > 4)
-                       return -1;
-               rule->day = strtol(*s+1, s, 10);
-               if (rule->day < 0 || rule->day > 6)
-                       return -1;
-               break;
-       default:
-               rule->month = 'L';
-               rule->day = strtol(*s+1, s, 10);
-               break;
-       }
-       if (**s == '/') {
-               (*s)++;
-               rule->time = hhmmss(s);
-       } else rule->time = 7200;
-       return 0;
-}
-
-void tzset(void)
-{
-       char *z, *a;
-       
-       strcpy(std_name, "GMT");
-       strcpy(dst_name, "GMT");
-       __tzname[0] = std_name;
-       __tzname[1] = dst_name;
-       __timezone = 0;
-       __daylight = 0;
-       
-       if (!(z = getenv("TZ")) || !isalpha(*z)) return;
-
-       zname(std_name, &z);
-       __timezone = hhmmss(&z);
-
-       zname(dst_name, &z);
-       if (dst_name[0]) __daylight=1;
-       a = z;
-       __dst_offset = hhmmss(&z) - __timezone;
-       if (z==a) __dst_offset = -3600;
-
-       if (dstrule(&__dst_start, &z) || dstrule(&__dst_end, &z))
-               __daylight = 0;
-}
-
-void __tzset(void)
-{
-       static int lock[2], init;
-       if (init) return;
-       LOCK(lock);
-       if (!init) tzset();
-       init=1;
-       UNLOCK(lock);
-}
-
-static int is_leap(int year)
-{
-       year -= 100;
-       return !(year&3) && ((year%100) || !(year%400));
-}
-
-static int cutoff_yday(struct tm *tm, struct rule *rule)
-{
-       static const char days_in_month[] = {31,28,31,30,31,30,31,31,30,31,30,31};
-       static const int first_day[] = {0,31,59,90,120,151,181,212,243,273,304,335};
-       int yday, mday, leap;
-       
-       switch (rule->month) {
-       case 'J':
-               return rule->day + (tm->tm_mon > 1 && is_leap(tm->tm_year));
-       case 'L':
-               return rule->day;
-       default:
-               yday = first_day[rule->month];
-               leap = is_leap(tm->tm_year);
-               if (rule->month > 1 && leap) yday++;
-               mday = (rule->day - (yday + tm->tm_wday - tm->tm_yday) + 1400)%7 + 7*rule->week;
-               if (mday >= days_in_month[rule->month] + (leap && rule->month == 1))
-                       mday -= 7;
-               return mday + yday;
-       }
-}
-
-struct tm *__dst_adjust(struct tm *tm)
-{
-       time_t t;
-       int start, end, secs;
-       int after_start, before_end;
-
-       if (tm->tm_isdst >= 0) return tm;
-       if (!__daylight) {
-               tm->tm_isdst = 0;
-               return tm;
-       }
-       
-       secs = tm->tm_hour*3600 + tm->tm_min*60 + tm->tm_sec;
-       start = cutoff_yday(tm, &__dst_start);
-       end = cutoff_yday(tm, &__dst_end);
-
-       after_start = (tm->tm_yday > start || (tm->tm_yday == start && secs >= __dst_start.time));
-       before_end = (tm->tm_yday < end || (tm->tm_yday == end && secs < __dst_end.time));
-
-       if ((after_start && before_end) || ((end < start) && (after_start || before_end))) {
-               tm->tm_sec -= __dst_offset;
-               tm->tm_isdst = 1;
-               t = __tm_to_time(tm);
-               return __time_to_tm(t, tm);
-       } else tm->tm_isdst = 0;
-
-       return tm;
-}