diff options
Diffstat (limited to 'time')
| -rw-r--r-- | time/Makefile | 3 | ||||
| -rw-r--r-- | time/README | 4 | ||||
| -rw-r--r-- | time/gmtime.c | 29 | ||||
| -rw-r--r-- | time/localtime.c | 99 | ||||
| -rw-r--r-- | time/mktime.c | 2 | ||||
| -rw-r--r-- | time/offtime.c | 6 | ||||
| -rw-r--r-- | time/strftime.c | 1 | ||||
| -rw-r--r-- | time/tzfile.c | 30 | ||||
| -rw-r--r-- | time/tzset.c | 109 |
9 files changed, 142 insertions, 141 deletions
diff --git a/time/Makefile b/time/Makefile index 123ba2d08a..c4945f7e4b 100644 --- a/time/Makefile +++ b/time/Makefile @@ -59,7 +59,9 @@ define nl endef +ifneq ($(no_deps),t) -include $(addprefix $(objpfx)z.,$(tzfiles)) +endif # Make these absolute file names. installed-localtime-file := $(firstword $(filter /%,$(inst_localtime-file)) \ @@ -80,6 +82,7 @@ endif ifeq ($(have-ksh),yes) install-others += $(inst_zonedir)/iso3166.tab $(inst_zonedir)/zone.tab install-bin += tzselect +generated += tzselect endif include ../Rules diff --git a/time/README b/time/README index c15f4f6f63..c189555c40 100644 --- a/time/README +++ b/time/README @@ -3,7 +3,7 @@ The source files `zdump.c' `tzselect.ksh' `checktab.awk' -come from the tzcode1997f package by Arthur David Olsen et.al. +come from the tzcode1997g package by Arthur David Olsen et.al. The files `africa' @@ -25,4 +25,4 @@ The files `zone.tab' `leapseconds' `yearistype' -come from the tzdata1997g package by Arthur David Olsen et.al. +come from the tzdata1997h package by Arthur David Olsen et.al. diff --git a/time/gmtime.c b/time/gmtime.c index f9627e7b62..2b388befb1 100644 --- a/time/gmtime.c +++ b/time/gmtime.c @@ -1,4 +1,5 @@ -/* Copyright (C) 1991, 1993, 1995, 1996, 1997 Free Software Foundation, Inc. +/* Convert `time_t' to `struct tm' in UTC. + Copyright (C) 1991, 1993, 1995, 1996, 1997 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 @@ -16,19 +17,14 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -#include <stddef.h> #include <time.h> /* Defined in localtime.c. */ extern struct tm _tmbuf; -/* Return the `struct tm' representation of *T in UTC. */ -struct tm * -gmtime (t) - const time_t *t; -{ - return __gmtime_r (t, &_tmbuf); -} +/* Prototype for the internal function to get information based on TZ. */ +extern struct tm *__tz_convert __P ((const time_t *t, int use_localtime, + struct tm *tp)); /* Return the `struct tm' representation of *T in UTC, @@ -38,12 +34,15 @@ __gmtime_r (t, tp) const time_t *t; struct tm *tp; { - __offtime (t, 0L, tp); + return __tz_convert (t, 0, tp); +} +weak_alias (__gmtime_r, gmtime_r) - tp->tm_isdst = 0; - tp->tm_gmtoff = 0L; - tp->tm_zone = "GMT"; - return tp; +/* Return the `struct tm' representation of *T in UTC. */ +struct tm * +gmtime (t) + const time_t *t; +{ + return __tz_convert (t, 0, &_tmbuf); } -weak_alias (__gmtime_r, gmtime_r) diff --git a/time/localtime.c b/time/localtime.c index 6b7c9f394c..3d8d8fbd10 100644 --- a/time/localtime.c +++ b/time/localtime.c @@ -17,106 +17,33 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -#include <errno.h> #include <time.h> -#include <bits/libc-lock.h> /* The C Standard says that localtime and gmtime return the same pointer. */ struct tm _tmbuf; /* Prototype for the internal function to get information based on TZ. */ -extern void __tzset_internal __P ((int always)); -extern int __tz_compute __P ((time_t timer, struct tm *tp)); -extern int __tzfile_compute __P ((time_t timer, - long int *leap_correct, int *leap_hit)); +extern struct tm *__tz_convert __P ((const time_t *t, int use_localtime, + struct tm *tp)); -extern int __use_tzfile; -/* This lock is defined in tzset.c and locks all the data defined there - and in tzfile.c; the internal functions do no locking themselves. - This lock is only taken here and in `tzset'. */ -__libc_lock_define (extern, __tzset_lock) - - -/* Return the `struct tm' representation of *TIMER in the local timezone. */ -static struct tm * -localtime_internal (const time_t *timer, struct tm *tp) -{ - long int leap_correction; - int leap_extra_secs; - - if (timer == NULL) - { - __set_errno (EINVAL); - return NULL; - } - - if (__use_tzfile) - { - if (! __tzfile_compute (*timer, &leap_correction, &leap_extra_secs)) - tp = NULL; - } - else - { - tp = __gmtime_r (timer, tp); - if (tp && ! __tz_compute (*timer, tp)) - tp = NULL; - leap_correction = 0L; - leap_extra_secs = 0; - } - - if (tp) - { - __offtime (timer, __timezone - leap_correction, tp); - tp->tm_sec += leap_extra_secs; - tp->tm_isdst = __daylight; - tp->tm_gmtoff = __timezone; - tp->tm_zone = __tzname[__daylight]; - } - - return tp; -} - - -/* POSIX.1 8.3.7.2 says that localtime_r is not required to set - tzname. This is a good idea since this allows at least a bit more - parallelism. */ +/* Return the `struct tm' representation of *T in local time, + using *TP to store the result. */ struct tm * -localtime (timer) - const time_t *timer; +__localtime_r (t, tp) + const time_t *t; + struct tm *tp; { - struct tm *result; - - __libc_lock_lock (__tzset_lock); - - /* Update internal database according to current TZ setting. */ - __tzset_internal (1); - - result = localtime_internal (timer, &_tmbuf); - - __libc_lock_unlock (__tzset_lock); - - return result; + return __tz_convert (t, 1, tp); } +weak_alias (__localtime_r, localtime_r) +/* Return the `struct tm' representation of *T in local time. */ struct tm * -__localtime_r (timer, tp) - const time_t *timer; - struct tm *tp; +localtime (t) + const time_t *t; { - struct tm *result; - - __libc_lock_lock (__tzset_lock); - - /* Make sure the database is initialized. */ - __tzset_internal (0); - - result = localtime_internal (timer, tp); - - __libc_lock_unlock (__tzset_lock); - - return result; + return __tz_convert (t, 1, &_tmbuf); } -weak_alias (__localtime_r, localtime_r) diff --git a/time/mktime.c b/time/mktime.c index 5012888967..1573cc79a9 100644 --- a/time/mktime.c +++ b/time/mktime.c @@ -225,10 +225,10 @@ __mktime_internal (tp, convert, offset) [mon_remainder + 12 * negative_mon_remainder]) + mday - 1); + int sec_requested = sec; #if LEAP_SECONDS_POSSIBLE /* Handle out-of-range seconds specially, since ydhms_tm_diff assumes every minute has 60 seconds. */ - int sec_requested = sec; if (sec < 0) sec = 0; if (59 < sec) diff --git a/time/offtime.c b/time/offtime.c index f13c8a38ae..a4b59ed209 100644 --- a/time/offtime.c +++ b/time/offtime.c @@ -33,8 +33,8 @@ __offtime (t, offset, tp) long int offset; struct tm *tp; { - register long int days, rem, y; - register const unsigned short int *ip; + long int days, rem, y; + const unsigned short int *ip; days = *t / SECS_PER_DAY; rem = *t % SECS_PER_DAY; @@ -75,7 +75,7 @@ __offtime (t, offset, tp) tp->tm_year = y - 1900; tp->tm_yday = days; ip = __mon_yday[__isleap(y)]; - for (y = 11; days < ip[y]; --y) + for (y = 11; days < (long int) ip[y]; --y) continue; days -= ip[y]; tp->tm_mon = y; diff --git a/time/strftime.c b/time/strftime.c index 891d301f5c..4ecbc5a519 100644 --- a/time/strftime.c +++ b/time/strftime.c @@ -132,7 +132,6 @@ extern char *tzname[]; #ifdef _LIBC # define gmtime_r __gmtime_r # define localtime_r __localtime_r -extern int __tz_compute __P ((time_t timer, const struct tm *tm)); # define tzname __tzname # define tzset __tzset #else diff --git a/time/tzfile.c b/time/tzfile.c index aeec637b3b..9289de63a0 100644 --- a/time/tzfile.c +++ b/time/tzfile.c @@ -112,8 +112,8 @@ __tzfile_read (const char *file) /* No user specification; use the site-wide default. */ file = TZDEFAULT; else if (*file == '\0') - /* User specified the empty string; use UTC explicitly. */ - file = "Universal"; + /* User specified the empty string; use UTC with no leap seconds. */ + return; else { /* We must not allow to read an arbitrary file in a setuid @@ -411,19 +411,23 @@ find_transition (time_t timer) } int -__tzfile_compute (time_t timer, long int *leap_correct, int *leap_hit) +__tzfile_compute (time_t timer, int use_localtime, + long int *leap_correct, int *leap_hit) { - struct ttinfo *info; register size_t i; - info = find_transition (timer); - __daylight = info->isdst; - __timezone = info->offset; - for (i = 0; i < num_types && i < sizeof (__tzname) / sizeof (__tzname[0]); - ++i) - __tzname[types[i].isdst] = &zone_names[types[i].idx]; - if (info->isdst < sizeof (__tzname) / sizeof (__tzname[0])) - __tzname[info->isdst] = &zone_names[info->idx]; + if (use_localtime) + { + struct ttinfo *info = find_transition (timer); + __daylight = info->isdst; + __timezone = info->offset; + for (i = 0; + i < num_types && i < sizeof (__tzname) / sizeof (__tzname[0]); + ++i) + __tzname[types[i].isdst] = &zone_names[types[i].idx]; + if (info->isdst < sizeof (__tzname) / sizeof (__tzname[0])) + __tzname[info->isdst] = &zone_names[info->idx]; + } *leap_correct = 0L; *leap_hit = 0; @@ -455,7 +459,7 @@ __tzfile_compute (time_t timer, long int *leap_correct, int *leap_hit) return 1; } -void +static void compute_tzname_max (size_t chars) { extern size_t __tzname_cur_max; /* Defined in tzset.c. */ diff --git a/time/tzset.c b/time/tzset.c index 49935c04d3..6c16091ef5 100644 --- a/time/tzset.c +++ b/time/tzset.c @@ -17,6 +17,8 @@ Boston, MA 02111-1307, USA. */ #include <ctype.h> +#include <errno.h> +#include <bits/libc-lock.h> #include <stddef.h> #include <stdio.h> #include <stdlib.h> @@ -26,15 +28,19 @@ /* Defined in mktime.c. */ extern const unsigned short int __mon_yday[2][13]; +/* Defined in localtime.c. */ +extern struct tm _tmbuf; + #define NOID #include "tzfile.h" extern int __use_tzfile; extern void __tzfile_read __P ((const char *file)); +extern int __tzfile_compute __P ((time_t timer, int use_localtime, + long int *leap_correct, int *leap_hit)); extern void __tzfile_default __P ((const char *std, const char *dst, long int stdoff, long int dstoff)); extern char * __tzstring __P ((const char *string)); -extern int __tz_compute __P ((time_t timer, const struct tm *tm)); char *__tzname[2] = { (char *) "GMT", (char *) "GMT" }; int __daylight = 0; @@ -44,6 +50,9 @@ weak_alias (__tzname, tzname) weak_alias (__daylight, daylight) weak_alias (__timezone, timezone) +/* This locks all the state variables in tzfile.c and this file. */ +__libc_lock_define (static, tzset_lock) + #define min(a, b) ((a) < (b) ? (a) : (b)) #define max(a, b) ((a) > (b) ? (a) : (b)) @@ -74,6 +83,8 @@ static tz_rule tz_rules[2]; static int compute_change __P ((tz_rule *rule, int year)); +static int tz_compute __P ((time_t timer, const struct tm *tm)); +static void tzset_internal __P ((int always)); /* Header for a list of buffers containing time zone strings. */ struct tzstring_head @@ -139,9 +150,8 @@ __tzstring (string) static char *old_tz = NULL; /* Interpret the TZ envariable. */ -void __tzset_internal __P ((int always)); -void -__tzset_internal (always) +static void +tzset_internal (always) int always; { static int is_initialized = 0; @@ -426,7 +436,11 @@ size_t __tzname_cur_max; long int __tzname_max () { - __tzset_internal (0); + __libc_lock_lock (tzset_lock); + + tzset_internal (0); + + __libc_lock_unlock (tzset_lock); return __tzname_cur_max; } @@ -473,8 +487,9 @@ compute_change (rule, year) case M: /* Mm.n.d - Nth "Dth day" of month M. */ { - register int i, d, m1, yy0, yy1, yy2, dow; - register const unsigned short int *myday = + unsigned int i; + int d, m1, yy0, yy1, yy2, dow; + const unsigned short int *myday = &__mon_yday[__isleap (year)][rule->m]; /* First add SECSPERDAY for each day in months before M. */ @@ -496,7 +511,7 @@ compute_change (rule, year) d += 7; for (i = 1; i < rule->n; ++i) { - if (d + 7 >= myday[0] - myday[-1]) + if (d + 7 >= (int) myday[0] - myday[-1]) break; d += 7; } @@ -519,13 +534,11 @@ compute_change (rule, year) /* 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 -__tz_compute (timer, tm) +static int +tz_compute (timer, tm) time_t timer; const struct tm *tm; { - __tzset_internal (0); - if (! compute_change (&tz_rules[0], 1900 + tm->tm_year) || ! compute_change (&tz_rules[1], 1900 + tm->tm_year)) return 0; @@ -548,20 +561,15 @@ __tz_compute (timer, tm) return 1; } -#include <bits/libc-lock.h> - -/* This locks all the state variables in tzfile.c and this file. */ -__libc_lock_define (, __tzset_lock) - /* Reinterpret the TZ environment variable and set `tzname'. */ #undef tzset void __tzset (void) { - __libc_lock_lock (__tzset_lock); + __libc_lock_lock (tzset_lock); - __tzset_internal (1); + tzset_internal (1); if (!__use_tzfile) { @@ -570,6 +578,67 @@ __tzset (void) __tzname[1] = (char *) tz_rules[1].name; } - __libc_lock_unlock (__tzset_lock); + __libc_lock_unlock (tzset_lock); } weak_alias (__tzset, tzset) + +/* Return the `struct tm' representation of *TIMER in the local timezone. + Use local time if USE_LOCALTIME is nonzero, UTC otherwise. */ +struct tm * +__tz_convert (const time_t *timer, int use_localtime, struct tm *tp) +{ + long int leap_correction; + int leap_extra_secs; + + if (timer == NULL) + { + __set_errno (EINVAL); + return NULL; + } + + __libc_lock_lock (tzset_lock); + + /* Update internal database according to current TZ setting. + POSIX.1 8.3.7.2 says that localtime_r is not required to set tzname. + This is a good idea since this allows at least a bit more parallelism. + By analogy we apply the same rule to gmtime_r. */ + tzset_internal (tp == &_tmbuf); + + if (__use_tzfile) + { + if (! __tzfile_compute (*timer, use_localtime, + &leap_correction, &leap_extra_secs)) + tp = NULL; + } + else + { + __offtime (timer, 0, tp); + if (! tz_compute (*timer, tp)) + tp = NULL; + leap_correction = 0L; + leap_extra_secs = 0; + } + + if (tp) + { + if (use_localtime) + { + tp->tm_isdst = __daylight; + tp->tm_zone = __tzname[__daylight]; + tp->tm_gmtoff = __timezone; + } + else + { + tp->tm_isdst = 0; + tp->tm_zone = "GMT"; + tp->tm_gmtoff = 0L; + } + + __offtime (timer, tp->tm_gmtoff - leap_correction, tp); + tp->tm_sec += leap_extra_secs; + } + + __libc_lock_unlock (tzset_lock); + + return tp; +} |