1996-02-16 17:15:45 +01:00
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/* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
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1995-02-18 02:27:10 +01:00
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <ctype.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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/* Defined in mktime.c. */
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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.
1995-10-06 05:50:55 +01:00
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extern CONST unsigned short int __mon_yday[2][13];
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1995-02-18 02:27:10 +01:00
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#define NOID
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#include "tzfile.h"
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extern int __use_tzfile;
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extern void EXFUN(__tzfile_read, (CONST char *file));
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extern void EXFUN(__tzfile_default, (char *std AND char *dst AND
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long int stdoff AND long int dstoff));
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extern int EXFUN(__tzfile_compute, (time_t, struct tm));
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char *__tzname[2] = { (char *) "GMT", (char *) "GMT" };
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int __daylight = 0;
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long int __timezone = 0L;
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1995-04-20 01:41:29 +02:00
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weak_alias (__tzname, tzname)
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weak_alias (__daylight, daylight)
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weak_alias (__timezone, timezone)
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1995-02-18 02:27:10 +01:00
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#define min(a, b) ((a) < (b) ? (a) : (b))
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#define max(a, b) ((a) > (b) ? (a) : (b))
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#define sign(x) ((x) < 0 ? -1 : 1)
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/* This structure contains all the information about a
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timezone given in the POSIX standard TZ envariable. */
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typedef struct
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{
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char *name;
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/* When to change. */
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enum { J0, J1, M } type; /* Interpretation of: */
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unsigned short int m, n, d; /* Month, week, day. */
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unsigned int secs; /* Time of day. */
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long int offset; /* Seconds east of GMT (west if < 0). */
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/* We cache the computed time of change for a
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given year so we don't have to recompute it. */
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time_t change; /* When to change to this zone. */
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int computed_for; /* Year above is computed for. */
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} tz_rule;
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/* tz_rules[0] is standard, tz_rules[1] is daylight. */
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static tz_rule tz_rules[2];
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int __tzset_run = 0;
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/* Interpret the TZ envariable. */
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void
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DEFUN_VOID(__tzset)
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{
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register CONST char *tz;
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register size_t l;
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unsigned short int hh, mm, ss;
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unsigned short int whichrule;
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/* Free old storage. */
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if (tz_rules[0].name != NULL && *tz_rules[0].name != '\0')
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free((PTR) tz_rules[0].name);
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if (tz_rules[1].name != NULL && *tz_rules[1].name != '\0' &&
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tz_rules[1].name != tz_rules[0].name)
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free((PTR) tz_rules[1].name);
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tz = getenv("TZ");
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if (tz != NULL && *tz == ':')
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{
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__tzfile_read(tz + 1);
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if (__use_tzfile)
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{
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__tzset_run = 1;
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return;
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}
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else
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tz = NULL;
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}
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if (tz == NULL || *tz == '\0')
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{
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__tzfile_read((char *) NULL);
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if (!__use_tzfile)
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{
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Sun Mar 5 19:40:13 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* locale/localeinfo.h: Rewritten for new locale system, using
locale data files and with <langinfo.h> interface.
* locale/setlocale.c: Rewritten to use locale data files.
* langinfo.h: New file.
* locale/langinfo.h: New file.
* locale/nl_langinfo.c: New file.
* locale/loadlocale.c: New file.
* locale/lc-ctype.c: New file.
* locale/lc-messages.c: New file.
* locale/lc-monetary.c: New file.
* locale/lc-numeric.c: New file.
* locale/lc-time.c: New file.
* locale/categories.def: New file.
* locale/Makefile (headers): Remove localeinfo.h.
(distribute): New variable; put localeinfo.h here, and categories.def.
(routines): Add loadlocale.
(categories): New variable.
(aux): Use that to get C-category and lc-category.
* ctype/ctype.h (_IS*): Use independent bits for all but _ISalnum.
* locale/C-ctype.c, locale/C-messages.c: New files.
* locale/C-monetary.c, locale/C-numeric.c, locale/C-time.c:
Default "C" locale data updated for new locale system.
* locale/C-collate.c: File removed.
* locale/C-ctype_ct.c: File removed.
* locale/C-ctype_mb.c: File removed.
* locale/C-response.c: File removed.
* locale/localeconv.c: Use _NL_CURRENT macro to access locale data.
* stdio/printf_fp.c, stdio/vfprintf.c, stdio/vfscanf.c,
stdlib/strtod.c, time/asctime.c, time/strftime.c:
Include ../locale/localeinfo.h and use _NL_CURRENT macro to access
locale data.
* time/localtime.c: Don't include <localeinfo.h>.
* time/tzset.c: Don't use locale items for default TZ value or
"GMT" string (use "UTC").
* stdio/vfprintf.c [USE_IN_LIBIO] (PAD): Only call the function if
WIDTH>0; update DONE.
* malloc/malloc.c (morecore): Fix last change to calculate by
blocks instead of bytes.
1995-03-06 04:00:08 +01:00
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const char UTC[] = "UTC";
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size_t len = sizeof UTC;
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1995-02-18 02:27:10 +01:00
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tz_rules[0].name = (char *) malloc(len);
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if (tz_rules[0].name == NULL)
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return;
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tz_rules[1].name = (char *) malloc(len);
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if (tz_rules[1].name == NULL)
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return;
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Sun Mar 5 19:40:13 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* locale/localeinfo.h: Rewritten for new locale system, using
locale data files and with <langinfo.h> interface.
* locale/setlocale.c: Rewritten to use locale data files.
* langinfo.h: New file.
* locale/langinfo.h: New file.
* locale/nl_langinfo.c: New file.
* locale/loadlocale.c: New file.
* locale/lc-ctype.c: New file.
* locale/lc-messages.c: New file.
* locale/lc-monetary.c: New file.
* locale/lc-numeric.c: New file.
* locale/lc-time.c: New file.
* locale/categories.def: New file.
* locale/Makefile (headers): Remove localeinfo.h.
(distribute): New variable; put localeinfo.h here, and categories.def.
(routines): Add loadlocale.
(categories): New variable.
(aux): Use that to get C-category and lc-category.
* ctype/ctype.h (_IS*): Use independent bits for all but _ISalnum.
* locale/C-ctype.c, locale/C-messages.c: New files.
* locale/C-monetary.c, locale/C-numeric.c, locale/C-time.c:
Default "C" locale data updated for new locale system.
* locale/C-collate.c: File removed.
* locale/C-ctype_ct.c: File removed.
* locale/C-ctype_mb.c: File removed.
* locale/C-response.c: File removed.
* locale/localeconv.c: Use _NL_CURRENT macro to access locale data.
* stdio/printf_fp.c, stdio/vfprintf.c, stdio/vfscanf.c,
stdlib/strtod.c, time/asctime.c, time/strftime.c:
Include ../locale/localeinfo.h and use _NL_CURRENT macro to access
locale data.
* time/localtime.c: Don't include <localeinfo.h>.
* time/tzset.c: Don't use locale items for default TZ value or
"GMT" string (use "UTC").
* stdio/vfprintf.c [USE_IN_LIBIO] (PAD): Only call the function if
WIDTH>0; update DONE.
* malloc/malloc.c (morecore): Fix last change to calculate by
blocks instead of bytes.
1995-03-06 04:00:08 +01:00
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memcpy ((PTR) tz_rules[0].name, UTC, len);
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memcpy ((PTR) tz_rules[1].name, UTC, len);
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1995-02-18 02:27:10 +01:00
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tz_rules[0].type = tz_rules[1].type = J0;
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tz_rules[0].m = tz_rules[0].n = tz_rules[0].d = 0;
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tz_rules[1].m = tz_rules[1].n = tz_rules[1].d = 0;
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tz_rules[0].secs = tz_rules[1].secs = 0;
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tz_rules[0].offset = tz_rules[1].offset = 0L;
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tz_rules[0].change = tz_rules[1].change = (time_t) -1;
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tz_rules[0].computed_for = tz_rules[1].computed_for = 0;
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}
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__tzset_run = 1;
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return;
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}
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Sun Mar 5 19:40:13 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* locale/localeinfo.h: Rewritten for new locale system, using
locale data files and with <langinfo.h> interface.
* locale/setlocale.c: Rewritten to use locale data files.
* langinfo.h: New file.
* locale/langinfo.h: New file.
* locale/nl_langinfo.c: New file.
* locale/loadlocale.c: New file.
* locale/lc-ctype.c: New file.
* locale/lc-messages.c: New file.
* locale/lc-monetary.c: New file.
* locale/lc-numeric.c: New file.
* locale/lc-time.c: New file.
* locale/categories.def: New file.
* locale/Makefile (headers): Remove localeinfo.h.
(distribute): New variable; put localeinfo.h here, and categories.def.
(routines): Add loadlocale.
(categories): New variable.
(aux): Use that to get C-category and lc-category.
* ctype/ctype.h (_IS*): Use independent bits for all but _ISalnum.
* locale/C-ctype.c, locale/C-messages.c: New files.
* locale/C-monetary.c, locale/C-numeric.c, locale/C-time.c:
Default "C" locale data updated for new locale system.
* locale/C-collate.c: File removed.
* locale/C-ctype_ct.c: File removed.
* locale/C-ctype_mb.c: File removed.
* locale/C-response.c: File removed.
* locale/localeconv.c: Use _NL_CURRENT macro to access locale data.
* stdio/printf_fp.c, stdio/vfprintf.c, stdio/vfscanf.c,
stdlib/strtod.c, time/asctime.c, time/strftime.c:
Include ../locale/localeinfo.h and use _NL_CURRENT macro to access
locale data.
* time/localtime.c: Don't include <localeinfo.h>.
* time/tzset.c: Don't use locale items for default TZ value or
"GMT" string (use "UTC").
* stdio/vfprintf.c [USE_IN_LIBIO] (PAD): Only call the function if
WIDTH>0; update DONE.
* malloc/malloc.c (morecore): Fix last change to calculate by
blocks instead of bytes.
1995-03-06 04:00:08 +01:00
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/* Clear out old state and reset to unnamed UTC. */
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1995-02-18 02:27:10 +01:00
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memset (tz_rules, 0, sizeof tz_rules);
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tz_rules[0].name = tz_rules[1].name = (char *) "";
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/* Get the standard timezone name. */
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tz_rules[0].name = (char *) malloc (strlen (tz) + 1);
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if (tz_rules[0].name == NULL)
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/* Don't set __tzset_run so we will try again. */
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return;
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if (sscanf(tz, "%[^0-9,+-]", tz_rules[0].name) != 1 ||
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(l = strlen(tz_rules[0].name)) < 3)
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{
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free (tz_rules[0].name);
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tz_rules[0].name = (char *) "";
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return;
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}
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{
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char *n = realloc ((PTR) tz_rules[0].name, l + 1);
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if (n != NULL)
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tz_rules[0].name = n;
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}
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tz += l;
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Sun Mar 5 19:40:13 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* locale/localeinfo.h: Rewritten for new locale system, using
locale data files and with <langinfo.h> interface.
* locale/setlocale.c: Rewritten to use locale data files.
* langinfo.h: New file.
* locale/langinfo.h: New file.
* locale/nl_langinfo.c: New file.
* locale/loadlocale.c: New file.
* locale/lc-ctype.c: New file.
* locale/lc-messages.c: New file.
* locale/lc-monetary.c: New file.
* locale/lc-numeric.c: New file.
* locale/lc-time.c: New file.
* locale/categories.def: New file.
* locale/Makefile (headers): Remove localeinfo.h.
(distribute): New variable; put localeinfo.h here, and categories.def.
(routines): Add loadlocale.
(categories): New variable.
(aux): Use that to get C-category and lc-category.
* ctype/ctype.h (_IS*): Use independent bits for all but _ISalnum.
* locale/C-ctype.c, locale/C-messages.c: New files.
* locale/C-monetary.c, locale/C-numeric.c, locale/C-time.c:
Default "C" locale data updated for new locale system.
* locale/C-collate.c: File removed.
* locale/C-ctype_ct.c: File removed.
* locale/C-ctype_mb.c: File removed.
* locale/C-response.c: File removed.
* locale/localeconv.c: Use _NL_CURRENT macro to access locale data.
* stdio/printf_fp.c, stdio/vfprintf.c, stdio/vfscanf.c,
stdlib/strtod.c, time/asctime.c, time/strftime.c:
Include ../locale/localeinfo.h and use _NL_CURRENT macro to access
locale data.
* time/localtime.c: Don't include <localeinfo.h>.
* time/tzset.c: Don't use locale items for default TZ value or
"GMT" string (use "UTC").
* stdio/vfprintf.c [USE_IN_LIBIO] (PAD): Only call the function if
WIDTH>0; update DONE.
* malloc/malloc.c (morecore): Fix last change to calculate by
blocks instead of bytes.
1995-03-06 04:00:08 +01:00
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/* Figure out the standard offset from UTC. */
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1995-02-18 02:27:10 +01:00
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if (*tz == '\0' || (*tz != '+' && *tz != '-' && !isdigit(*tz)))
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return;
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if (*tz == '-' || *tz == '+')
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tz_rules[0].offset = *tz++ == '-' ? 1L : -1L;
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else
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tz_rules[0].offset = -1L;
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switch (sscanf (tz, "%hu:%hu:%hu", &hh, &mm, &ss))
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{
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default:
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return;
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case 1:
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mm = 0;
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case 2:
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ss = 0;
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case 3:
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break;
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}
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tz_rules[0].offset *= (min(ss, 59) + (min(mm, 59) * 60) +
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1996-02-16 17:15:45 +01:00
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(min(hh, 23) * 60 * 60));
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1995-02-18 02:27:10 +01:00
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for (l = 0; l < 3; ++l)
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{
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while (isdigit(*tz))
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++tz;
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if (l < 2 && *tz == ':')
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++tz;
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}
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|
|
|
|
|
|
/* Get the DST timezone name (if any). */
|
|
|
|
|
if (*tz != '\0')
|
|
|
|
|
{
|
|
|
|
|
char *n = malloc (strlen(tz) + 1);
|
|
|
|
|
if (n != NULL)
|
|
|
|
|
{
|
|
|
|
|
tz_rules[1].name = n;
|
|
|
|
|
if (sscanf(tz, "%[^0-9,+-]", tz_rules[1].name) != 1 ||
|
|
|
|
|
(l = strlen(tz_rules[1].name)) < 3)
|
|
|
|
|
{
|
|
|
|
|
free (n);
|
|
|
|
|
tz_rules[1].name = (char *) "";
|
|
|
|
|
goto done_names; /* Punt on name, set up the offsets. */
|
|
|
|
|
}
|
|
|
|
|
n = realloc ((PTR) tz_rules[1].name, l + 1);
|
|
|
|
|
if (n != NULL)
|
|
|
|
|
tz_rules[1].name = n;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
tz += l;
|
|
|
|
|
|
|
|
|
|
/* Figure out the DST offset from GMT. */
|
|
|
|
|
if (*tz == '-' || *tz == '+')
|
|
|
|
|
tz_rules[1].offset = *tz++ == '-' ? 1L : -1L;
|
|
|
|
|
else
|
|
|
|
|
tz_rules[1].offset = -1L;
|
|
|
|
|
|
|
|
|
|
switch (sscanf (tz, "%hu:%hu:%hu", &hh, &mm, &ss))
|
|
|
|
|
{
|
|
|
|
|
default:
|
|
|
|
|
/* Default to one hour later than standard time. */
|
|
|
|
|
tz_rules[1].offset = tz_rules[0].offset + (60 * 60);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case 1:
|
|
|
|
|
mm = 0;
|
|
|
|
|
case 2:
|
|
|
|
|
ss = 0;
|
|
|
|
|
case 3:
|
|
|
|
|
tz_rules[1].offset *= (min(ss, 59) + (min(mm, 59) * 60) +
|
1996-02-16 17:15:45 +01:00
|
|
|
|
(min(hh, 23) * (60 * 60)));
|
1995-02-18 02:27:10 +01:00
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
for (l = 0; l < 3; ++l)
|
|
|
|
|
{
|
|
|
|
|
while (isdigit (*tz))
|
|
|
|
|
++tz;
|
|
|
|
|
if (l < 2 && *tz == ':')
|
|
|
|
|
++tz;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
done_names:
|
|
|
|
|
|
|
|
|
|
if (*tz == '\0' || (tz[0] == ',' && tz[1] == '\0'))
|
|
|
|
|
{
|
|
|
|
|
/* There is no rule. See if there is a default rule file. */
|
|
|
|
|
__tzfile_default (tz_rules[0].name, tz_rules[1].name,
|
|
|
|
|
tz_rules[0].offset, tz_rules[1].offset);
|
|
|
|
|
if (__use_tzfile)
|
|
|
|
|
{
|
|
|
|
|
__tzset_run = 1;
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Figure out the standard <-> DST rules. */
|
|
|
|
|
for (whichrule = 0; whichrule < 2; ++whichrule)
|
|
|
|
|
{
|
|
|
|
|
register tz_rule *tzr = &tz_rules[whichrule];
|
1996-02-16 17:15:45 +01:00
|
|
|
|
|
1995-02-18 02:27:10 +01:00
|
|
|
|
if (*tz == ',')
|
|
|
|
|
{
|
|
|
|
|
++tz;
|
|
|
|
|
if (*tz == '\0')
|
|
|
|
|
return;
|
|
|
|
|
}
|
1996-02-16 17:15:45 +01:00
|
|
|
|
|
1995-02-18 02:27:10 +01:00
|
|
|
|
/* Get the date of the change. */
|
|
|
|
|
if (*tz == 'J' || isdigit (*tz))
|
|
|
|
|
{
|
|
|
|
|
char *end;
|
|
|
|
|
tzr->type = *tz == 'J' ? J1 : J0;
|
|
|
|
|
if (tzr->type == J1 && !isdigit (*++tz))
|
|
|
|
|
return;
|
|
|
|
|
tzr->d = (unsigned short int) strtoul (tz, &end, 10);
|
|
|
|
|
if (end == tz || tzr->d > 365)
|
|
|
|
|
return;
|
|
|
|
|
else if (tzr->type == J1 && tzr->d == 0)
|
|
|
|
|
return;
|
|
|
|
|
tz = end;
|
|
|
|
|
}
|
|
|
|
|
else if (*tz == 'M')
|
|
|
|
|
{
|
|
|
|
|
int n;
|
|
|
|
|
tzr->type = M;
|
|
|
|
|
if (sscanf (tz, "M%hu.%hu.%hu%n",
|
|
|
|
|
&tzr->m, &tzr->n, &tzr->d, &n) != 3 ||
|
|
|
|
|
tzr->m < 1 || tzr->m > 12 ||
|
|
|
|
|
tzr->n < 1 || tzr->n > 5 || tzr->d > 6)
|
|
|
|
|
return;
|
|
|
|
|
tz += n;
|
|
|
|
|
}
|
|
|
|
|
else if (*tz == '\0')
|
|
|
|
|
{
|
|
|
|
|
/* United States Federal Law, the equivalent of "M4.1.0,M10.5.0". */
|
|
|
|
|
tzr->type = M;
|
|
|
|
|
if (tzr == &tz_rules[0])
|
|
|
|
|
{
|
|
|
|
|
tzr->m = 4;
|
|
|
|
|
tzr->n = 1;
|
|
|
|
|
tzr->d = 0;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
tzr->m = 10;
|
|
|
|
|
tzr->n = 5;
|
|
|
|
|
tzr->d = 0;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
return;
|
1996-02-16 17:15:45 +01:00
|
|
|
|
|
1995-02-18 02:27:10 +01:00
|
|
|
|
if (*tz != '\0' && *tz != '/' && *tz != ',')
|
|
|
|
|
return;
|
|
|
|
|
else if (*tz == '/')
|
|
|
|
|
{
|
|
|
|
|
/* Get the time of day of the change. */
|
|
|
|
|
++tz;
|
|
|
|
|
if (*tz == '\0')
|
|
|
|
|
return;
|
|
|
|
|
switch (sscanf (tz, "%hu:%hu:%hu", &hh, &mm, &ss))
|
|
|
|
|
{
|
|
|
|
|
default:
|
|
|
|
|
hh = 2; /* Default to 2:00 AM. */
|
|
|
|
|
case 1:
|
|
|
|
|
mm = 0;
|
|
|
|
|
case 2:
|
|
|
|
|
ss = 0;
|
|
|
|
|
case 3:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
for (l = 0; l < 3; ++l)
|
|
|
|
|
{
|
|
|
|
|
while (isdigit(*tz))
|
|
|
|
|
++tz;
|
|
|
|
|
if (l < 2 && *tz == ':')
|
|
|
|
|
++tz;
|
|
|
|
|
}
|
|
|
|
|
tzr->secs = (hh * 60 * 60) + (mm * 60) + ss;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
/* Default to 2:00 AM. */
|
|
|
|
|
tzr->secs = 2 * 60 * 60;
|
|
|
|
|
|
|
|
|
|
tzr->computed_for = -1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
__tzset_run = 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Maximum length of a timezone name. __tz_compute keeps this up to date
|
|
|
|
|
(never decreasing it) when ! __use_tzfile.
|
|
|
|
|
tzfile.c keeps it up to date when __use_tzfile. */
|
|
|
|
|
long int __tzname_cur_max;
|
|
|
|
|
|
|
|
|
|
long int
|
|
|
|
|
DEFUN_VOID(__tzname_max)
|
|
|
|
|
{
|
|
|
|
|
if (! __tzset_run)
|
|
|
|
|
__tzset ();
|
|
|
|
|
|
|
|
|
|
return __tzname_cur_max;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Figure out the exact time (as a time_t) in YEAR
|
|
|
|
|
when the change described by RULE will occur and
|
|
|
|
|
put it in RULE->change, saving YEAR in RULE->computed_for.
|
|
|
|
|
Return nonzero if successful, zero on failure. */
|
|
|
|
|
static int
|
|
|
|
|
DEFUN(compute_change, (rule, year), tz_rule *rule AND int year)
|
|
|
|
|
{
|
|
|
|
|
register time_t t;
|
|
|
|
|
int y;
|
|
|
|
|
|
|
|
|
|
if (year != -1 && rule->computed_for == year)
|
|
|
|
|
/* Operations on times in 1969 will be slower. Oh well. */
|
|
|
|
|
return 1;
|
1996-02-16 17:15:45 +01:00
|
|
|
|
|
1995-02-18 02:27:10 +01:00
|
|
|
|
/* First set T to January 1st, 0:00:00 GMT in YEAR. */
|
|
|
|
|
t = 0;
|
|
|
|
|
for (y = 1970; y < year; ++y)
|
|
|
|
|
t += SECSPERDAY * (__isleap (y) ? 366 : 365);
|
|
|
|
|
|
|
|
|
|
switch (rule->type)
|
|
|
|
|
{
|
|
|
|
|
case J1:
|
|
|
|
|
/* Jn - Julian day, 1 == January 1, 60 == March 1 even in leap years.
|
|
|
|
|
In non-leap years, or if the day number is 59 or less, just
|
|
|
|
|
add SECSPERDAY times the day number-1 to the time of
|
|
|
|
|
January 1, midnight, to get the day. */
|
|
|
|
|
t += (rule->d - 1) * SECSPERDAY;
|
|
|
|
|
if (rule->d >= 60 && __isleap (year))
|
|
|
|
|
t += SECSPERDAY;
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case J0:
|
|
|
|
|
/* n - Day of year.
|
|
|
|
|
Just add SECSPERDAY times the day number to the time of Jan 1st. */
|
|
|
|
|
t += rule->d * SECSPERDAY;
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case M:
|
|
|
|
|
/* Mm.n.d - Nth "Dth day" of month M. */
|
|
|
|
|
{
|
|
|
|
|
register int i, d, m1, yy0, yy1, yy2, dow;
|
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.
1995-10-06 05:50:55 +01:00
|
|
|
|
register CONST unsigned short int *myday =
|
|
|
|
|
&__mon_yday[__isleap (year)][rule->m];
|
1995-02-18 02:27:10 +01:00
|
|
|
|
|
|
|
|
|
/* First add SECSPERDAY for each day in months before M. */
|
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.
1995-10-06 05:50:55 +01:00
|
|
|
|
t += myday[-1] * SECSPERDAY;
|
1995-02-18 02:27:10 +01:00
|
|
|
|
|
|
|
|
|
/* Use Zeller's Congruence to get day-of-week of first day of month. */
|
|
|
|
|
m1 = (rule->m + 9) % 12 + 1;
|
|
|
|
|
yy0 = (rule->m <= 2) ? (year - 1) : year;
|
|
|
|
|
yy1 = yy0 / 100;
|
|
|
|
|
yy2 = yy0 % 100;
|
|
|
|
|
dow = ((26 * m1 - 2) / 10 + 1 + yy2 + yy2 / 4 + yy1 / 4 - 2 * yy1) % 7;
|
|
|
|
|
if (dow < 0)
|
|
|
|
|
dow += 7;
|
|
|
|
|
|
|
|
|
|
/* DOW is the day-of-week of the first day of the month. Get the
|
|
|
|
|
day-of-month (zero-origin) of the first DOW day of the month. */
|
|
|
|
|
d = rule->d - dow;
|
|
|
|
|
if (d < 0)
|
|
|
|
|
d += 7;
|
|
|
|
|
for (i = 1; i < rule->n; ++i)
|
|
|
|
|
{
|
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.
1995-10-06 05:50:55 +01:00
|
|
|
|
if (d + 7 >= myday[0] - myday[-1])
|
1995-02-18 02:27:10 +01:00
|
|
|
|
break;
|
|
|
|
|
d += 7;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* D is the day-of-month (zero-origin) of the day we want. */
|
|
|
|
|
t += d * SECSPERDAY;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* T is now the Epoch-relative time of 0:00:00 GMT on the day we want.
|
|
|
|
|
Just add the time of day and local offset from GMT, and we're done. */
|
|
|
|
|
|
|
|
|
|
rule->change = t + rule->offset + rule->secs;
|
|
|
|
|
rule->computed_for = year;
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Figure out the correct timezone for *TIMER and TM (which must be the same)
|
|
|
|
|
and set `__tzname', `__timezone', and `__daylight' accordingly.
|
|
|
|
|
Return nonzero on success, zero on failure. */
|
|
|
|
|
int
|
|
|
|
|
DEFUN(__tz_compute, (timer, tm),
|
|
|
|
|
time_t timer AND const struct tm *tm)
|
|
|
|
|
{
|
|
|
|
|
if (! __tzset_run)
|
|
|
|
|
__tzset ();
|
|
|
|
|
|
|
|
|
|
if (! compute_change (&tz_rules[0], 1900 + tm->tm_year) ||
|
|
|
|
|
! compute_change (&tz_rules[1], 1900 + tm->tm_year))
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
__daylight = timer >= tz_rules[0].change && timer < tz_rules[1].change;
|
|
|
|
|
__timezone = tz_rules[__daylight ? 1 : 0].offset;
|
|
|
|
|
__tzname[0] = (char *) tz_rules[0].name;
|
|
|
|
|
__tzname[1] = (char *) tz_rules[1].name;
|
|
|
|
|
|
|
|
|
|
{
|
|
|
|
|
/* Keep __tzname_cur_max up to date. */
|
|
|
|
|
size_t len0 = strlen (__tzname[0]);
|
|
|
|
|
size_t len1 = strlen (__tzname[1]);
|
|
|
|
|
if (len0 > __tzname_cur_max)
|
|
|
|
|
__tzname_cur_max = len0;
|
|
|
|
|
if (len1 > __tzname_cur_max)
|
|
|
|
|
__tzname_cur_max = len1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
weak_alias (__tzset, tzset)
|