mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-22 10:50:07 +00:00
b77e6cd621
1998-12-10 Ulrich Drepper <drepper@cygnus.com> * inet/getnetgrent_r.c (innetgr): Check host and domain name with strcasecmp, not strcmp. [PR libc/894]. 1998-12-08 Andreas Jaeger <aj@arthur.rhein-neckar.de> * posix/regex.h: Declare re_comp, re_exec if compiling for libc to get prototypes. * wctype/wctype.h: Add prototypes for __iswblank_l and iswblank. 1998-12-08 Andreas Jaeger <aj@arthur.rhein-neckar.de> * sysdeps/unix/sysv/linux/gethostid.c: Include <netdb.h> to get prototype for __gethostbyname_r. * include/time.h: Add declarations of internal interfaces. * time/tzset.c: Remove declarations of internal interfaces. * time/gmtime.c: Likewise. * time/localtime.c: Likewise. * time/offtime.c: Likewise. * time/tzfile.c: Likewise.
86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
/* Copyright (C) 1991, 1993, 1997, 1998 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <time.h>
|
|
|
|
#define SECS_PER_HOUR (60 * 60)
|
|
#define SECS_PER_DAY (SECS_PER_HOUR * 24)
|
|
|
|
/* Compute the `struct tm' representation of *T,
|
|
offset OFFSET seconds east of UTC,
|
|
and store year, yday, mon, mday, wday, hour, min, sec into *TP.
|
|
Return nonzero if successful. */
|
|
int
|
|
__offtime (t, offset, tp)
|
|
const time_t *t;
|
|
long int offset;
|
|
struct tm *tp;
|
|
{
|
|
long int days, rem, y;
|
|
const unsigned short int *ip;
|
|
|
|
days = *t / SECS_PER_DAY;
|
|
rem = *t % SECS_PER_DAY;
|
|
rem += offset;
|
|
while (rem < 0)
|
|
{
|
|
rem += SECS_PER_DAY;
|
|
--days;
|
|
}
|
|
while (rem >= SECS_PER_DAY)
|
|
{
|
|
rem -= SECS_PER_DAY;
|
|
++days;
|
|
}
|
|
tp->tm_hour = rem / SECS_PER_HOUR;
|
|
rem %= SECS_PER_HOUR;
|
|
tp->tm_min = rem / 60;
|
|
tp->tm_sec = rem % 60;
|
|
/* January 1, 1970 was a Thursday. */
|
|
tp->tm_wday = (4 + days) % 7;
|
|
if (tp->tm_wday < 0)
|
|
tp->tm_wday += 7;
|
|
y = 1970;
|
|
|
|
#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
|
|
#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
|
|
|
|
while (days < 0 || days >= (__isleap (y) ? 366 : 365))
|
|
{
|
|
/* Guess a corrected year, assuming 365 days per year. */
|
|
long int yg = y + days / 365 - (days % 365 < 0);
|
|
|
|
/* Adjust DAYS and Y to match the guessed year. */
|
|
days -= ((yg - y) * 365
|
|
+ LEAPS_THRU_END_OF (yg - 1)
|
|
- LEAPS_THRU_END_OF (y - 1));
|
|
y = yg;
|
|
}
|
|
tp->tm_year = y - 1900;
|
|
if (tp->tm_year != y - 1900)
|
|
return 0;
|
|
tp->tm_yday = days;
|
|
ip = __mon_yday[__isleap(y)];
|
|
for (y = 11; days < (long int) ip[y]; --y)
|
|
continue;
|
|
days -= ip[y];
|
|
tp->tm_mon = y;
|
|
tp->tm_mday = days + 1;
|
|
return 1;
|
|
}
|