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| author | Roland McGrath <roland@gnu.org> | 1995-10-06 04:50:55 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 1995-10-06 04:50:55 +0000 |
| commit | 80fd73873bd51e58039983a9416ef3bb97bdac57 (patch) | |
| tree | 76bfd0b8072711fe1600de73879168d4b9671c33 /time/tzset.c | |
| parent | 6a76c115150318eae5d02eca76f2fc03be7bd029 (diff) | |
| download | glibc-80fd73873bd51e58039983a9416ef3bb97bdac57.zip glibc-80fd73873bd51e58039983a9416ef3bb97bdac57.tar.gz glibc-80fd73873bd51e58039983a9416ef3bb97bdac57.tar.bz2 | |
Fri Sep 29 03:43:51 1995 Paul Eggert <eggert@twinsun.com>
Rewrite mktime from scratch for performance, and for correctness
in the presence of leap seconds.
* time/mktime.c (ydhms_tm_diff, not_equal_tm, print_tm, check_result):
New functions.
(LEAP_SECONDS_POSSIBLE, CHAR_BIT, INT_MIN, INT_MAX,
TIME_T_MIN, TIME_T_MAX, TM_YEAR_BASE, EPOCH_YEAR): New macros.
<limits.h>, <stdlib.h>: New #includes.
(main): Support tests with given broken-down value; support benchmarks.
(__mon_lengths, debugging_enabled, printtm, dist_tm, doit,
do_normalization, normalize, BAD_STRUCT_TM, SKIP_VALUE,
<ctype.h>): Remove.
* time/time.h, time/mktime.c (__mktime_internal): New offset arg.
* time/mktime.c (mktime), time/timegm.c (timegm): Use it.
* time/mktime.c (__mon_yday): New variable; replaces `__mon_lengths'.
time/offtime.c (__offtime), time/tzset.c (compute_change): Use it.
* time/offtime.c (__offtime): Remove useless assignment
`tp->tm_isdst = -1'.
* manual/maint.texi: Update credits.
Fri Oct 6 00:28:53 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* sysdeps/unix/common/readv.S: Moved to sysdeps/unix/bsd.
* sysdeps/unix/common/writev.S: Moved to sysdeps/unix/bsd.
* sysdeps/unix/sysv/linux/readv.c: File removed.
* sysdeps/unix/sysv/linux/writev.c: File removed.
* sysdeps/unix/configure.in: Check for readv and writev syscalls.
* sysdeps/unix/configure.in: If eval doesn't set $unix_srcname,
set it to $unix_syscall instead of $unix_function.
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 ccaffd9..813609c 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; } |