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| author | Ulrich Drepper <drepper@redhat.com> | 2005-01-26 00:01:20 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2005-01-26 00:01:20 +0000 |
| commit | 792dcd77cdafb46c746119e250a5ba9d20598f8f (patch) | |
| tree | bb604fb38044db5ee084d94996775399ac3de2ab /timezone/tzfile.h | |
| parent | 1f25bddd621e1cad0d655ea9cedf3a718d6fdabb (diff) | |
| download | glibc-792dcd77cdafb46c746119e250a5ba9d20598f8f.tar.gz glibc-792dcd77cdafb46c746119e250a5ba9d20598f8f.tar.xz glibc-792dcd77cdafb46c746119e250a5ba9d20598f8f.zip | |
Update.
2005-01-25 Jakub Jelinek <jakub@redhat.com> * stdlib/fmtmsg.c (addseverity): Remove new_string variable. (free_mem): Don't free string. * stdlib/tst-fmtmsg.c: Include string.h. (main): Add some more tests. 2005-01-25 Andreas Schwab <schwab@suse.de> * timezone/asia: Update from tzdata2005c. * timezone/backward: Likewise. * timezone/leapseconds: Likewise. * timezone/northamerica: Likewise. * timezone/southamerica: Likewise. * timezone/private.h: Update from tzcode2005c. * timezone/tzfile.h: Likewise. * timezone/zdump.c: Likewise. * timezone/zic.c: Likewise.
Diffstat (limited to 'timezone/tzfile.h')
| -rw-r--r-- | timezone/tzfile.h | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/timezone/tzfile.h b/timezone/tzfile.h index 0921c3c339..0e9966a950 100644 --- a/timezone/tzfile.h +++ b/timezone/tzfile.h @@ -21,7 +21,7 @@ #ifndef lint #ifndef NOID -static char tzfilehid[] = "@(#)tzfile.h 7.14"; +static char tzfilehid[] = "@(#)tzfile.h 7.16"; #endif /* !defined NOID */ #endif /* !defined lint */ @@ -156,12 +156,21 @@ struct tzhead { #define EPOCH_YEAR 1970 #define EPOCH_WDAY TM_THURSDAY +#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0)) + /* -** Accurate only for the past couple of centuries; -** that will probably do. +** Since everything in isleap is modulo 400 (or a factor of 400), we know that +** isleap(y) == isleap(y % 400) +** and so +** isleap(a + b) == isleap((a + b) % 400) +** or +** isleap(a + b) == isleap(a % 400 + b % 400) +** This is true even if % means modulo rather than Fortran remainder +** (which is allowed by C89 but not C99). +** We use this to avoid addition overflow problems. */ -#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0)) +#define isleap_sum(a, b) isleap((a) % 400 + (b) % 400) #ifndef USG |