diff options
Diffstat (limited to 'time/tzset.c')
| -rw-r--r-- | time/tzset.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/time/tzset.c b/time/tzset.c index ccaffd9c4a..813609c230 100644 --- a/time/tzset.c +++ b/time/tzset.c @@ -25,7 +25,7 @@ Cambridge, MA 02139, USA. */ #include <time.h> /* Defined in mktime.c. */ -extern CONST unsigned short int __mon_lengths[2][12]; +extern CONST unsigned short int __mon_yday[2][13]; #define NOID #include "tzfile.h" @@ -403,10 +403,11 @@ DEFUN(compute_change, (rule, year), tz_rule *rule AND int year) /* Mm.n.d - Nth "Dth day" of month M. */ { register int i, d, m1, yy0, yy1, yy2, dow; + register CONST unsigned short int *myday = + &__mon_yday[__isleap (year)][rule->m]; /* First add SECSPERDAY for each day in months before M. */ - for (i = 0; i < rule->m - 1; ++i) - t += __mon_lengths[__isleap (year)][i] * SECSPERDAY; + t += myday[-1] * SECSPERDAY; /* Use Zeller's Congruence to get day-of-week of first day of month. */ m1 = (rule->m + 9) % 12 + 1; @@ -424,7 +425,7 @@ DEFUN(compute_change, (rule, year), tz_rule *rule AND int year) d += 7; for (i = 1; i < rule->n; ++i) { - if (d + 7 >= __mon_lengths[__isleap (year)][rule->m - 1]) + if (d + 7 >= myday[0] - myday[-1]) break; d += 7; } |