diff options
Diffstat (limited to 'libc/misc/time')
| -rw-r--r-- | libc/misc/time/Makefile | 3 | ||||
| -rw-r--r-- | libc/misc/time/__time_locale.c | 3 | ||||
| -rw-r--r-- | libc/misc/time/__time_static.c | 17 | ||||
| -rw-r--r-- | libc/misc/time/asc_conv.c | 33 | ||||
| -rw-r--r-- | libc/misc/time/asctime.c | 19 | ||||
| -rw-r--r-- | libc/misc/time/asctime_r.c | 17 | ||||
| -rw-r--r-- | libc/misc/time/ctime.c | 26 | ||||
| -rw-r--r-- | libc/misc/time/ctime_r.c | 24 | ||||
| -rw-r--r-- | libc/misc/time/difftime.c | 5 | ||||
| -rw-r--r-- | libc/misc/time/gmtime.c | 13 | ||||
| -rw-r--r-- | libc/misc/time/localtime.c | 27 | ||||
| -rw-r--r-- | libc/misc/time/mktime.c | 475 | ||||
| -rw-r--r-- | libc/misc/time/strftime.c | 33 | ||||
| -rw-r--r-- | libc/misc/time/strptime.c | 34 | ||||
| -rw-r--r-- | libc/misc/time/tm_conv.c | 113 |
15 files changed, 432 insertions, 410 deletions
diff --git a/libc/misc/time/Makefile b/libc/misc/time/Makefile index ae32f94a2..62fafd75f 100644 --- a/libc/misc/time/Makefile +++ b/libc/misc/time/Makefile @@ -26,7 +26,8 @@ include $(TOPDIR)Rules.mak CSRC=localtime.c gmtime.c asctime.c ctime.c asc_conv.c tm_conv.c mktime.c \ localtime_r.c gmtime_r.c asctime_r.c ctime_r.c utimes.c adjtime.c \ - clock.c difftime.c time.c ftime.c strftime.c strptime.c __time_locale.c + clock.c difftime.c time.c ftime.c strftime.c strptime.c __time_locale.c \ + __time_static.c COBJS=$(patsubst %.c,%.o, $(CSRC)) OBJS=$(COBJS) diff --git a/libc/misc/time/__time_locale.c b/libc/misc/time/__time_locale.c index 9956134cf..0d78a0a67 100644 --- a/libc/misc/time/__time_locale.c +++ b/libc/misc/time/__time_locale.c @@ -1,3 +1,4 @@ +#ifndef __UCLIBC_HAS_LOCALE__ char const __weekday_name[][10] = { "Sunday", "Monday", "Tuesday", "Wednesday", @@ -25,3 +26,5 @@ const unsigned short int __mon_yday[2][13] = /* Leap years. */ { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } }; +#endif + diff --git a/libc/misc/time/__time_static.c b/libc/misc/time/__time_static.c new file mode 100644 index 000000000..d921ced90 --- /dev/null +++ b/libc/misc/time/__time_static.c @@ -0,0 +1,17 @@ + +#include <time.h> + +/* These globals are exported by the C library */ +char *__tzname[2] = { (char *) "GMT", (char *) "GMT" }; +int __daylight = 0; +long int __timezone = 0L; +/* Grumble */ +weak_alias (__tzname, tzname); +weak_alias (__daylight, daylight); +weak_alias (__timezone, timezone); + + +/* static data for gmtime() and localtime() */ +struct tm __tmb; + + diff --git a/libc/misc/time/asc_conv.c b/libc/misc/time/asc_conv.c index 78339dd6c..f5ab0a615 100644 --- a/libc/misc/time/asc_conv.c +++ b/libc/misc/time/asc_conv.c @@ -1,4 +1,5 @@ +#include <features.h> #include <time.h> #include <string.h> /* @@ -16,29 +17,39 @@ * * Also fixed day conversion ... ANSI says no leading 0. * + * Modified Erik Andersen May 2002 + * Changed to optionally support real locales. + * */ -void __asctime(buffer, ptm) -register char *buffer; -struct tm *ptm; +#ifdef __UCLIBC_HAS_LOCALE__ +/* This is defined in locale/C-time.c in the GNU libc. */ +extern const struct locale_data _nl_C_LC_TIME; +extern const unsigned short int __mon_yday[2][13]; +# define __ab_weekday_name \ + (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (ABDAY_1)].string) +# define __ab_month_name (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (ABMON_1)].string) +#else +extern char const __ab_weekday_name[][4]; +extern char const __ab_month_name[][4]; +#endif + +void __asctime(register char *buffer, struct tm *ptm) { - static const char days[] = "SunMonTueWedThuFriSat"; - static const char mons[] = "JanFebMarAprMayJunJulAugSepOctNovDec"; - /* 012345678901234567890123456 */ - static const char template[] = "Err Err 00 00:00:00 0000\n"; - int tm_field[4]; - int tmp, i; char *p; + int tmp, i, tm_field[4]; + /* 012345678901234567890123456 */ + static const char template[] = "??? ??? 00 00:00:00 0000\n"; /* Since we need memcpy below, use it here instead of strcpy. */ memcpy(buffer, template, sizeof(template)); if ((ptm->tm_wday >= 0) && (ptm->tm_wday <= 6)) { - memcpy(buffer, days + 3 * (ptm->tm_wday), 3); + memcpy(buffer, __ab_weekday_name[ptm->tm_wday], 3); } if ((ptm->tm_mon >= 0) && (ptm->tm_mon <= 11)) { - memcpy(buffer + 4, mons + 3 * (ptm->tm_mon), 3); + memcpy(buffer + 4, __ab_month_name[ptm->tm_mon], 3); } tm_field[0] = ptm->tm_mday; diff --git a/libc/misc/time/asctime.c b/libc/misc/time/asctime.c index bfb1a13fc..9d5772335 100644 --- a/libc/misc/time/asctime.c +++ b/libc/misc/time/asctime.c @@ -1,15 +1,18 @@ #include <time.h> +#include <errno.h> extern void __asctime(); -char *asctime(timeptr) -__const struct tm *timeptr; -{ - static char timebuf[26]; - if (timeptr == 0) - return 0; - __asctime(timebuf, timeptr); - return timebuf; +char * asctime (__const struct tm *timeptr) +{ + static char __time_buf[26]; + if (timeptr == NULL) { + __set_errno (EINVAL); + return NULL; + } + __asctime(__time_buf, timeptr); + return __time_buf; } + diff --git a/libc/misc/time/asctime_r.c b/libc/misc/time/asctime_r.c index 823ab4f4d..215031949 100644 --- a/libc/misc/time/asctime_r.c +++ b/libc/misc/time/asctime_r.c @@ -1,15 +1,16 @@ #include <time.h> +#include <errno.h> extern void __asctime(); -char *asctime_r(timeptr, buf) -__const struct tm *timeptr; -char *buf; +char *asctime_r(__const struct tm *timeptr, char *buf) { - - if (timeptr == 0) - return 0; - __asctime(buf, timeptr); - return buf; + if (timeptr == NULL || buf == NULL) { + __set_errno (EINVAL); + return NULL; + } + __asctime(buf, timeptr); + return buf; } + diff --git a/libc/misc/time/ctime.c b/libc/misc/time/ctime.c index 8783d284e..027f5d5a7 100644 --- a/libc/misc/time/ctime.c +++ b/libc/misc/time/ctime.c @@ -2,25 +2,13 @@ #include <time.h> #include <sys/time.h> -extern void __tm_conv(); -extern void __asctime(); - -char *ctime(timep) -__const time_t *timep; +char * ctime (const time_t *t) { - static char cbuf[26]; - struct tm tmb; - struct timezone tz; - time_t offt; - - gettimeofday((void *) 0, &tz); - - offt = -tz.tz_minuteswest * 60L; - /* tmb.tm_isdst = ? */ - __tm_conv(&tmb, timep, offt); - - __asctime(cbuf, &tmb); - - return cbuf; + /* According to IEEE Std 1003.1-2001: The ctime() function shall + * convert the time pointed to by clock, representing time in + * seconds since the Epoch, to local time in the form of a string. + * It shall be equivalent to: asctime(localtime(clock)) */ + return asctime (localtime (t)); } + diff --git a/libc/misc/time/ctime_r.c b/libc/misc/time/ctime_r.c index b608098ae..1b323a258 100644 --- a/libc/misc/time/ctime_r.c +++ b/libc/misc/time/ctime_r.c @@ -2,25 +2,9 @@ #include <time.h> #include <sys/time.h> -extern void __tm_conv(); -extern void __asctime(); - -char *ctime_r(timep, buf) -__const time_t *timep; -char *buf; +char * ctime_r(const time_t *t, char *buf) { - struct tm tmb; - struct timezone tz; - time_t offt; - - gettimeofday((void *) 0, &tz); - - offt = -tz.tz_minuteswest * 60L; - - /* tmb.tm_isdst = ? */ - __tm_conv(&tmb, timep, offt); - - __asctime(buf, &tmb); + struct tm tm; + return asctime_r(localtime_r(t, &tm), buf); +} - return buf; -} diff --git a/libc/misc/time/difftime.c b/libc/misc/time/difftime.c index 6a9b708ea..88a9244ba 100644 --- a/libc/misc/time/difftime.c +++ b/libc/misc/time/difftime.c @@ -22,10 +22,7 @@ /* Return the difference between TIME1 and TIME0. */ -double -difftime (time1, time0) - time_t time1; - time_t time0; +double difftime (time_t time1, time_t time0) { /* Algorithm courtesy Paul Eggert (eggert@twinsun.com). */ diff --git a/libc/misc/time/gmtime.c b/libc/misc/time/gmtime.c index 03cc9d56c..e9d648037 100644 --- a/libc/misc/time/gmtime.c +++ b/libc/misc/time/gmtime.c @@ -3,12 +3,11 @@ extern void __tm_conv(); -struct tm *gmtime(timep) -__const time_t *timep; -{ - static struct tm tmb; - - __tm_conv(&tmb, timep, 0L); +/* Our static data lives in __time_static.c */ +extern struct tm __tmb; - return &tmb; +struct tm *gmtime(__const time_t *timep) +{ + __tm_conv(&__tmb, timep, 0L); + return &__tmb; } diff --git a/libc/misc/time/localtime.c b/libc/misc/time/localtime.c index cdfd9bde3..22f5035e9 100644 --- a/libc/misc/time/localtime.c +++ b/libc/misc/time/localtime.c @@ -2,30 +2,23 @@ #include <time.h> #include <sys/time.h> -/* These globals are exported by the C library */ -char *__tzname[2] = { (char *) "GMT", (char *) "GMT" }; -int __daylight = 0; -long int __timezone = 0L; -weak_alias (__tzname, tzname); -weak_alias (__daylight, daylight); -weak_alias (__timezone, timezone); +/* Our static data lives in __time_static.c */ +extern struct tm __tmb; extern void __tm_conv(); -struct tm *localtime(timep) -__const time_t *timep; +struct tm *localtime(__const time_t *timep) { - static struct tm tmb; - struct timezone tz; - time_t offt; + struct timezone tz; + time_t offt; - gettimeofday((void *) 0, &tz); + gettimeofday((void *) 0, &tz); - offt = -tz.tz_minuteswest * 60L; + offt = -tz.tz_minuteswest * 60L; - /* tmb.tm_isdst = ? */ - __tm_conv(&tmb, timep, offt); + /* tmb.tm_isdst = ? */ + __tm_conv(&__tmb, timep, offt); - return &tmb; + return &__tmb; } diff --git a/libc/misc/time/mktime.c b/libc/misc/time/mktime.c index 7286e666b..065126e0e 100644 --- a/libc/misc/time/mktime.c +++ b/libc/misc/time/mktime.c @@ -1,92 +1,90 @@ - -/* This is adapted from glibc */ -/* Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc. */ - - -/* Assume that leap seconds are possible, unless told otherwise. - If the host has a `zic' command with a -L leapsecondfilename' option, - then it supports leap seconds; otherwise it probably doesn't. */ -#ifndef LEAP_SECONDS_POSSIBLE -#define LEAP_SECONDS_POSSIBLE 1 -#endif - -#include <sys/types.h> /* Some systems define `time_t' here. */ +/* Convert a `struct tm' to a time_t value. + Copyright (C) 1993, 94, 95, 96, 97, 98, 99 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Paul Eggert (eggert@twinsun.com). + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* Define this to have a standalone program to test this implementation of + mktime. */ + +#include <features.h> +/* Assume that leap seconds are not possible */ +#undef LEAP_SECONDS_POSSIBLE +#include <sys/types.h> /* Some systems define `time_t' here. */ #include <time.h> - -#if __STDC__ || __GNU_LIBRARY__ || STDC_HEADERS #include <limits.h> -#endif - -#if DEBUG -#include <stdio.h> -#if __STDC__ || __GNU_LIBRARY__ || STDC_HEADERS -#include <stdlib.h> -#endif -/* Make it work even if the system's libc has its own mktime routine. */ -#define mktime my_mktime -#endif /* DEBUG */ - -#ifndef __P -#if defined (__GNUC__) || (defined (__STDC__) && __STDC__) -#define __P(args) args -#else -#define __P(args) () -#endif /* GCC. */ -#endif /* Not __P. */ +#if 0 #ifndef CHAR_BIT -#define CHAR_BIT 8 +# define CHAR_BIT 8 #endif +/* The extra casts work around common compiler bugs. */ +#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1)) +/* The outer cast is needed to work around a bug in Cray C 5.0.3.0. + It is necessary at least when t == time_t. */ +#define TYPE_MINIMUM(t) ((t) (TYPE_SIGNED (t) \ + ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0)) +#define TYPE_MAXIMUM(t) ((t) (~ (t) 0 - TYPE_MINIMUM (t))) + #ifndef INT_MIN -#define INT_MIN (~0 << (sizeof (int) * CHAR_BIT - 1)) +# define INT_MIN TYPE_MINIMUM (int) #endif #ifndef INT_MAX -#define INT_MAX (~0 - INT_MIN) +# define INT_MAX TYPE_MAXIMUM (int) #endif #ifndef TIME_T_MIN -#define TIME_T_MIN (0 < (time_t) -1 ? (time_t) 0 \ - : ~ (time_t) 0 << (sizeof (time_t) * CHAR_BIT - 1)) +# define TIME_T_MIN TYPE_MINIMUM (time_t) #endif #ifndef TIME_T_MAX -#define TIME_T_MAX (~ (time_t) 0 - TIME_T_MIN) +# define TIME_T_MAX TYPE_MAXIMUM (time_t) #endif #define TM_YEAR_BASE 1900 #define EPOCH_YEAR 1970 -#ifndef __isleap -/* Nonzero if YEAR is a leap year (every 4 years, - except every 100th isn't, and every 400th is). */ -#define __isleap(year) \ - ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) -#endif +/* How many days come before each month (0-12). */ extern const unsigned short int __mon_yday[2][13]; -static time_t ydhms_tm_diff -__P((int, int, int, int, int, const struct tm *)); -time_t __mktime_internal -__P((struct tm *, struct tm * (*)(const time_t *, struct tm *), time_t *)); /* Yield the difference between (YEAR-YDAY HOUR:MIN:SEC) and (*TP), measured in seconds, ignoring leap seconds. YEAR uses the same numbering as TM->tm_year. All values are in range, except possibly YEAR. + If TP is null, return a nonzero value. If overflow occurs, yield the low order bits of the correct answer. */ -static time_t ydhms_tm_diff(year, yday, hour, min, sec, tp) -int year, yday, hour, min, sec; -const struct tm *tp; +static time_t +__ydhms_tm_diff (int year, int yday, int hour, int min, int sec, + const struct tm *tp) { + if (!tp) + return 1; + else + { /* Compute intervening leap days correctly even if year is negative. Take care to avoid int overflow. time_t overflow is OK, since only the low order bits of the correct time_t answer are needed. Don't convert to time_t until after all divisions are done, since time_t might be unsigned. */ - int a4 = (year >> 2) + (TM_YEAR_BASE >> 2) - !(year & 3); - int b4 = (tp->tm_year >> 2) + (TM_YEAR_BASE >> 2) - !(tp->tm_year & 3); + int a4 = (year >> 2) + (TM_YEAR_BASE >> 2) - ! (year & 3); + int b4 = (tp->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (tp->tm_year & 3); int a100 = a4 / 25 - (a4 % 25 < 0); int b100 = b4 / 25 - (b4 % 25 < 0); int a400 = a100 >> 2; @@ -94,193 +92,236 @@ const struct tm *tp; int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400); time_t years = year - (time_t) tp->tm_year; time_t days = (365 * years + intervening_leap_days - - + (yday - tp->tm_yday)); + + (yday - tp->tm_yday)); return (60 * (60 * (24 * days + (hour - tp->tm_hour)) - + (min - tp->tm_min)) - + (sec - tp->tm_sec)); + + (min - tp->tm_min)) + + (sec - tp->tm_sec)); + } } - -/* This structure contains all the information about a - timezone given in the POSIX standard TZ envariable. */ -typedef struct - { - const char *name; - - /* When to change. */ - enum { J0, J1, M } type; /* Interpretation of: */ - unsigned short int m, n, d; /* Month, week, day. */ - unsigned int secs; /* Time of day. */ - - long int offset; /* Seconds east of GMT (west if < 0). */ - - /* We cache the computed time of change for a - given year so we don't have to recompute it. */ - time_t change; /* When to change to this zone. */ - int computed_for; /* Year above is computed for. */ - } tz_rule; - -/* tz_rules[0] is standard, tz_rules[1] is daylight. */ -static tz_rule tz_rules[2]; - -/* Warning -- this function is a stub andd always does UTC - * no matter what it is given */ -void tzset (void) +/* Use CONVERT to convert *T to a broken down time in *TP. + If *T is out of range for conversion, adjust it so that + it is the nearest in-range value and then convert that. */ +static struct tm * +__ranged_convert (struct tm *(*convert) (const time_t *, struct tm *), + time_t *t, struct tm *tp) { - tz_rules[0].name = tz_rules[1].name = "UTC"; - tz_rules[0].type = tz_rules[1].type = J0; - tz_rules[0].m = tz_rules[0].n = tz_rules[0].d = 0; - tz_rules[1].m = tz_rules[1].n = tz_rules[1].d = 0; - tz_rules[0].secs = tz_rules[1].secs = 0; - tz_rules[0].offset = tz_rules[1].offset = 0L; - tz_rules[0].change = tz_rules[1].change = (time_t) -1; - tz_rules[0].computed_for = tz_rules[1].computed_for = 0; -} - + struct tm *r; + if (! (r = (*convert) (t, tp)) && *t) + { + time_t bad = *t; + time_t ok = 0; + struct tm tm; -static time_t localtime_offset; + /* BAD is a known unconvertible time_t, and OK is a known good one. + Use binary search to narrow the range between BAD and OK until + they differ by 1. */ + while (bad != ok + (bad < 0 ? -1 : 1)) + { + time_t mid = *t = (bad < 0 + ? bad + ((ok - bad) >> 1) + : ok + ((bad - ok) >> 1)); + if ((r = (*convert) (t, tp))) + { + tm = *r; + ok = mid; + } + else + bad = mid; + } -/* Convert *TP to a time_t value. */ -time_t mktime(tp) -struct tm *tp; -{ -#ifdef _LIBC - /* POSIX.1 8.1.1 requires that whenever mktime() is called, the - time zone names contained in the external variable `tzname' shall - be set as if the tzset() function had been called. */ - tzset(); -#endif + if (!r && ok) + { + /* The last conversion attempt failed; + revert to the most recent successful attempt. */ + *t = ok; + *tp = tm; + r = tp; + } + } - return __mktime_internal(tp, localtime_r, &localtime_offset); + return r; } + /* Convert *TP to a time_t value, inverting the monotonic and mostly-unit-linear conversion function CONVERT. Use *OFFSET to keep track of a guess at the offset of the result, compared to what the result would be for UTC without leap seconds. If *OFFSET's guess is correct, only one CONVERT call is needed. */ -time_t __mktime_internal(tp, convert, offset) -struct tm *tp; -struct tm *(*convert) __P((const time_t *, struct tm *)); -time_t *offset; +time_t __mktime_internal (struct tm *tp, + struct tm *(*convert) (const time_t *, struct tm *), time_t *offset) { - time_t t, dt, t0; - struct tm tm; - - /* The maximum number of probes (calls to CONVERT) should be enough - to handle any combinations of time zone rule changes, solar time, - and leap seconds. Posix.1 prohibits leap seconds, but some hosts - have them anyway. */ - int remaining_probes = 4; - - /* Time requested. Copy it in case CONVERT modifies *TP; this can - occur if TP is localtime's returned value and CONVERT is localtime. */ - int sec = tp->tm_sec; - int min = tp->tm_min; - int hour = tp->tm_hour; - int mday = tp->tm_mday; - int mon = tp->tm_mon; - int year_requested = tp->tm_year; - int isdst = tp->tm_isdst; - - /* Ensure that mon is in range, and set year accordingly. */ - int mon_remainder = mon % 12; - int negative_mon_remainder = mon_remainder < 0; - int mon_years = mon / 12 - negative_mon_remainder; - int year = year_requested + mon_years; - - /* The other values need not be in range: - the remaining code handles minor overflows correctly, - assuming int and time_t arithmetic wraps around. - Major overflows are caught at the end. */ - - /* Calculate day of year from year, month, and day of month. - The result need not be in range. */ - int yday = ((__mon_yday[__isleap(year + TM_YEAR_BASE)] - [mon_remainder + 12 * negative_mon_remainder]) - + mday - 1); - + time_t t, dt, t0, t1, t2; + struct tm tm; + + /* The maximum number of probes (calls to CONVERT) should be enough + to handle any combinations of time zone rule changes, solar time, + leap seconds, and oscillations around a spring-forward gap. + POSIX.1 prohibits leap seconds, but some hosts have them anyway. */ + int remaining_probes = 6; + + /* Time requested. Copy it in case CONVERT modifies *TP; this can + occur if TP is localtime's returned value and CONVERT is localtime. */ + int sec = tp->tm_sec; + int min = tp->tm_min; + int hour = tp->tm_hour; + int mday = tp->tm_mday; + int mon = tp->tm_mon; + int year_requested = tp->tm_year; + int isdst = tp->tm_isdst; + + /* Ensure that mon is in range, and set year accordingly. */ + int mon_remainder = mon % 12; + int negative_mon_remainder = mon_remainder < 0; + int mon_years = mon / 12 - negative_mon_remainder; + int year = year_requested + mon_years; + + /* The other values need not be in range: + the remaining code handles minor overflows correctly, + assuming int and time_t arithmetic wraps around. + Major overflows are caught at the end. */ + + /* Calculate day of year from year, month, and day of month. + The result need not be in range. */ + int yday = ((__mon_yday[__isleap (year + TM_YEAR_BASE)] + [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) - sec = 59; + /* Handle out-of-range seconds specially, + since __ydhms_tm_diff assumes every minute has 60 seconds. */ + if (sec < 0) + sec = 0; + if (59 < sec) + sec = 59; #endif - /* Invert CONVERT by probing. First assume the same offset as last time. - Then repeatedly use the error to improve the guess. */ - - tm.tm_year = EPOCH_YEAR - TM_YEAR_BASE; - tm.tm_yday = tm.tm_hour = tm.tm_min = tm.tm_sec = 0; - t0 = ydhms_tm_diff(year, yday, hour, min, sec, &tm); - - for (t = t0 + *offset; - (dt = - ydhms_tm_diff(year, yday, hour, min, sec, (*convert) (&t, &tm))); - t += dt) - if (--remaining_probes == 0) - return -1; - - /* Check whether tm.tm_isdst has the requested value, if any. */ - if (0 <= isdst && 0 <= tm.tm_isdst) { - int dst_diff = (isdst != 0) - (tm.tm_isdst != 0); - - if (dst_diff) { - /* Move two hours in the direction indicated by the disagreement, - probe some more, and switch to a new time if found. - The largest known fallback due to daylight savings is two hours: - once, in Newfoundland, 1988-10-30 02:00 -> 00:00. */ - time_t ot = t - 2 * 60 * 60 * dst_diff; - - while (--remaining_probes != 0) { - struct tm otm; - - if (!(dt = ydhms_tm_diff(year, yday, hour, min, sec, - (*convert) (&ot, &otm)))) { - t = ot; - tm = otm; - break; - } - if ((ot += dt) == t) - break; /* Avoid a redundant probe. */ - } - } + /* Invert CONVERT by probing. First assume the same offset as last time. + Then repeatedly use the error to improve the guess. */ + + tm.tm_year = EPOCH_YEAR - TM_YEAR_BASE; + tm.tm_yday = tm.tm_hour = tm.tm_min = tm.tm_sec = 0; + t0 = __ydhms_tm_diff (year, yday, hour, min, sec, &tm); + + for (t = t1 = t2 = t0 + *offset; + (dt = __ydhms_tm_diff (year, yday, hour, min, sec, + __ranged_convert (convert, &t, &tm))); + t1 = t2, t2 = t, t += dt) + if (t == t1 && t != t2 + && (isdst < 0 || tm.tm_isdst < 0 + || (isdst != 0) != (tm.tm_isdst != 0))) + /* We can't possibly find a match, as we are oscillating + between two values. The requested time probably falls + within a spring-forward gap of size DT. Follow the common + practice in this case, which is to return a time that is DT + away from the requested time, preferring a time whose + tm_isdst differs from the requested value. In practice, + this is more useful than returning -1. */ + break; + else if (--remaining_probes == 0) + return -1; + + /* If we have a match, check whether tm.tm_isdst has the requested + value, if any. */ + if (dt == 0 && isdst != tm.tm_isdst && 0 <= isdst && 0 <= tm.tm_isdst) + { + /* tm.tm_isdst has the wrong value. Look for a neighboring + time with the right value, and use its UTC offset. +Heuristic: probe the previous three calendar quarters (approximately), +looking for the desired isdst. This isn't perfect, +but it's good enough in practice. */ + int quarter = 7889238; /* seconds per average 1/4 Gregorian year */ + int i; + + /* If we're too close to the time_t limit, look in future quarters. */ + if (t < TIME_T_MIN + 3 * quarter) + quarter = -quarter; + + for (i = 1; i <= 3; i++) + { + time_t ot = t - i * quarter; + struct tm otm; + __ranged_convert (convert, &ot, &otm); + if (otm.tm_isdst == isdst) + { + /* We found the desired tm_isdst. + Extrapolate back to the desired time. */ + t = ot + __ydhms_tm_diff (year, yday, hour, min, sec, &otm); + __ranged_convert (convert, &t, &tm); + break; + } } + } - *offset = t - t0; + *offset = t - t0; #if LEAP_SECONDS_POSSIBLE - if (sec_requested != tm.tm_sec) { - /* Adjust time to reflect the tm_sec requested, not the normalized value. - Also, repair any damage from a false match due to a leap second. */ - t += sec_requested - sec + (sec == 0 && tm.tm_sec == 60); - (*convert) (&t, &tm); - } + if (sec_requested != tm.tm_sec) + { + /* Adjust time to reflect the tm_sec requested, not the normalized value. + Also, repair any damage from a false match due to a leap second. */ + t += sec_requested - sec + (sec == 0 && tm.tm_sec == 60); + if (! (*convert) (&t, &tm)) + return -1; + } #endif -#if 0 - if (TIME_T_MAX / INT_MAX / 366 / 24 / 60 / 60 < 3) { - /* time_t isn't large enough to rule out overflows in ydhms_tm_diff, - so check for major overflows. A gross check suffices, - since if t has overflowed, it is off by a multiple of - TIME_T_MAX - TIME_T_MIN + 1. So ignore any component of - the difference that is bounded by a small value. */ - - double dyear = (double) year_requested + mon_years - tm.tm_year; - double dday = 366 * dyear + mday; - double dsec = 60 * (60 * (24 * dday + hour) + min) + sec_requested; - - if (TIME_T_MAX / 3 - TIME_T_MIN / 3 < (dsec < 0 ? -dsec : dsec)) - return -1; - } -#endif + if (TIME_T_MAX / INT_MAX / 366 / 24 / 60 / 60 < 3) + { + /* time_t isn't large enough to rule out overflows in __ydhms_tm_diff, + so check for major overflows. A gross check suffices, + since if t has overflowed, it is off by a multiple of + TIME_T_MAX - TIME_T_MIN + 1. So ignore any component of + the difference that is bounded by a small value. */ + + double dyear = (double) year_requested + mon_years - tm.tm_year; + double dday = 366 * dyear + mday; + double dsec = 60 * (60 * (24 * dday + hour) + min) + sec_requested; + + /* On Irix4.0.5 cc, dividing TIME_T_MIN by 3 does not produce + correct results, ie., it erroneously gives a positive value + of 715827882. Setting a variable first then doing math on it + seems to work. (ghazi@caip.rutgers.edu) */ + + const time_t time_t_max = TIME_T_MAX; + const time_t time_t_min = TIME_T_MIN; + + if (time_t_max / 3 - time_t_min / 3 < (dsec < 0 ? - dsec : dsec)) + return -1; + } - *tp = tm; - return t; + *tp = tm; + return t; } + + + +/* Convert *TP to a time_t value. */ +time_t mktime (struct tm *tp) +{ + static time_t localtime_offset; + /* POSIX.1 8.1.1 requires that whenever mktime() is called, the + time zone names contained in the external variable `tzname' shall + be set as if the tzset() function had been called. */ + tzset (); + + return __mktime_internal (tp, localtime_r, &localtime_offset); +} +#else + +/* Convert *TP to a time_t value. */ +time_t mktime (struct tm *tp) +{ + time_t m_secs=tp->tm_min*60; + time_t h_secs=tp->tm_hour*3600; + time_t d_secs=tp->tm_yday*86400; + time_t y_secs=(tp->tm_year-70)*31536000; + time_t l_secs1=((tp->tm_year-69)/4)*86400; + time_t l_secs2=((tp->tm_year-1)/100)*86400; + time_t l_secs3=((tp->tm_year+299)/400)*86400; + return m_secs+h_secs+d_secs+y_secs+l_secs1-l_secs2+l_secs3+tp->tm_gmtoff; +} +#endif diff --git a/libc/misc/time/strftime.c b/libc/misc/time/strftime.c index e1f0a4c1f..bde0d93d8 100644 --- a/libc/misc/time/strftime.c +++ b/libc/misc/time/strftime.c @@ -84,7 +84,7 @@ static unsigned int week(const struct tm *const tp , int starting_day , int max_ : base + 1 + dl / 7; } -#ifndef _NL_CURRENT +#ifndef __UCLIBC_HAS_LOCALE__ extern char const __weekday_name[][10]; extern char const __month_name[][10]; #endif @@ -98,7 +98,7 @@ extern char const __month_name[][10]; size_t strftime( char *s , size_t maxsize , const char *format , register const struct tm *tp) { int hour12 = tp->tm_hour; -#ifdef _NL_CURRENT +#ifdef __UCLIBC_HAS_LOCALE__ const char *const a_wkday = _NL_CURRENT (LC_TIME, ABDAY_1 + tp->tm_wday); const char *const f_wkday = _NL_CURRENT (LC_TIME, DAY_1 + tp->tm_wday); const char *const a_month = _NL_CURRENT (LC_TIME, ABMON_1 + tp->tm_mon); @@ -133,15 +133,17 @@ size_t strftime( char *s , size_t maxsize , const char *format , register const /* Initialize the buffer we will use for the sprintf format for numbers. */ number_fmt[0] = '%'; - zone = 0; -#if HAVE_TM_ZONE + /* The POSIX test suite assumes that setting + the environment variable TZ to a new value before calling strftime() + will influence the result (the %Z format) even if the information in + TP is computed with a totally different time zone. + This is bogus: though POSIX allows bad behavior like this, + POSIX does not require it. Do the right thing instead. */ zone = (const char *) tp->tm_zone; -#endif - if (!(zone && *zone) && tp->tm_isdst >= 0) - zone = tzname[tp->tm_isdst]; - if (!(zone && *zone)) - zone = "???"; - + /* POSIX.1 8.1.1 requires that whenever strftime() is called, the + time zone names contained in the external variable `tzname' shall + be set as if the tzset() function had been called. */ + tzset (); zonelen = strlen (zone); if (hour12 > 12) @@ -218,7 +220,7 @@ size_t strftime( char *s , size_t maxsize , const char *format , register const break; case 'c': -#ifdef _NL_CURRENT +#ifdef __UCLIBC_HAS_LOCALE__ subfmt = _NL_CURRENT (LC_TIME, D_T_FMT); #else subfmt = "%a %b %d %H:%M:%S %Z %Y"; @@ -241,7 +243,7 @@ size_t strftime( char *s , size_t maxsize , const char *format , register const DO_NUMBER (2, (1900 + tp->tm_year) / 100); case 'x': -#ifdef _NL_CURRENT +#ifdef __UCLIBC_HAS_LOCALE__ subfmt = _NL_CURRENT (LC_TIME, D_FMT); goto subformat; #endif @@ -341,7 +343,7 @@ size_t strftime( char *s , size_t maxsize , const char *format , register const DO_NUMBER (2, tp->tm_sec); case 'X': -#ifdef _NL_CURRENT +#ifdef __UCLIBC_HAS_LOCALE__ subfmt = _NL_CURRENT (LC_TIME, T_FMT); goto subformat; #endif @@ -373,6 +375,11 @@ size_t strftime( char *s , size_t maxsize , const char *format , register const DO_NUMBER (2, tp->tm_year % 100); case 'Z': + /* The tzset() call might have changed the value. */ + if (!(zone && *zone) && tp->tm_isdst >= 0) + zone = tzname[tp->tm_isdst]; + if (! zone) + zone = ""; /* POSIX.2 requires the empty string here. */ cpy(zonelen, zone); break; diff --git a/libc/misc/time/strptime.c b/libc/misc/time/strptime.c index d8afa281f..749eb797d 100644 --- a/libc/misc/time/strptime.c +++ b/libc/misc/time/strptime.c @@ -23,13 +23,13 @@ some of them in the same format (such as year, week and weekday) this is enough information for determining the date. */ +#include <features.h> #include <ctype.h> #include <langinfo.h> #include <limits.h> #include <string.h> #include <time.h> -#undef _NL_CURRENT #undef ENABLE_ERA_JUNK @@ -62,7 +62,7 @@ if (val < from || val > to) \ return NULL; \ } while (0) -#ifdef _NL_CURRENT +#ifdef __UCLIBC_HAS_LOCALE__ # define get_alt_number(from, to, n) \ ({ \ __label__ do_normal; \ @@ -95,7 +95,7 @@ && (rp = __strptime_internal (rp, (new_fmt), tm, decided, era_cnt)) != NULL) -#ifdef _NL_CURRENT +#ifdef __UCLIBC_HAS_LOCALE__ /* This is defined in locale/C-time.c in the GNU libc. */ extern const struct locale_data _nl_C_LC_TIME; extern const unsigned short int __mon_yday[2][13]; @@ -184,14 +184,16 @@ static char * __strptime_internal (rp, fmt, tm, decided, era_cnt) int have_mon, have_mday; int have_uweek, have_wweek; int week_no; +#ifdef ENABLE_ERA_JUNK size_t num_eras; struct era_entry *era; + era = NULL; +#endif have_I = is_pm = 0; century = -1; want_century = 0; want_era = 0; - era = NULL; week_no = 0; have_wday = want_xday = have_yday = have_mon = have_mday = have_uweek = 0; @@ -218,7 +220,7 @@ static char * __strptime_internal (rp, fmt, tm, decided, era_cnt) } ++fmt; -#ifndef _NL_CURRENT +#ifndef __UCLIBC_HAS_LOCALE__ /* We need this for handling the `E' modifier. */ start_over: #endif @@ -237,7 +239,7 @@ start_over: /* Match day of week. */ for (cnt = 0; cnt < 7; ++cnt) { -#ifdef _NL_CURRENT +#ifdef __UCLIBC_HAS_LOCALE__ if (*decided !=raw) { if (match_string (_NL_CURRENT (LC_TIME, DAY_1 + cnt), rp)) @@ -278,7 +280,7 @@ start_over: /* Match month name. */ for (cnt = 0; cnt < 12; ++cnt) { -#ifdef _NL_CURRENT +#ifdef __UCLIBC_HAS_LOCALE__ if (*decided !=raw) { if (match_string (_NL_CURRENT (LC_TIME, MON_1 + cnt), rp)) @@ -314,7 +316,7 @@ start_over: break; case 'c': /* Match locale's date and time format. */ -#ifdef _NL_CURRENT +#ifdef __UCLIBC_HAS_LOCALE__ if (*decided != raw) { if (!recursive (_NL_CURRENT (LC_TIME, D_T_FMT))) @@ -341,7 +343,9 @@ start_over: break; case 'C': /* Match century number. */ +#ifdef __UCLIBC_HAS_LOCALE__ match_century: +#endif get_number (0, 99, 2); century = val; want_xday = 1; @@ -360,7 +364,7 @@ match_century: want_xday = 1; break; case 'x': -#ifdef _NL_CURRENT +#ifdef __UCLIBC_HAS_LOCALE__ if (*decided != raw) { if (!recursive (_NL_CURRENT (LC_TIME, D_FMT))) @@ -429,7 +433,7 @@ match_century: break; case 'p': /* Match locale's equivalent of AM/PM. */ -#ifdef _NL_CURRENT +#ifdef __UCLIBC_HAS_LOCALE__ if (*decided != raw) { if (match_string (_NL_CURRENT (LC_TIME, AM_STR), rp)) @@ -455,7 +459,7 @@ match_century: return NULL; break; case 'r': -#ifdef _NL_CURRENT +#ifdef __UCLIBC_HAS_LOCALE__ if (*decided != raw) { if (!recursive (_NL_CURRENT (LC_TIME, T_FMT_AMPM))) @@ -511,7 +515,7 @@ match_century: tm->tm_sec = val; break; case 'X': -#ifdef _NL_CURRENT +#ifdef __UCLIBC_HAS_LOCALE__ if (*decided != raw) { if (!recursive (_NL_CURRENT (LC_TIME, T_FMT))) @@ -575,7 +579,9 @@ match_century: have_wday = 1; break; case 'y': +#ifdef __UCLIBC_HAS_LOCALE__ match_year_in_century: +#endif /* Match year within century. */ get_number (0, 99, 2); /* The "Year 2000: The Millennium Rollover" paper suggests that @@ -596,7 +602,7 @@ match_year_in_century: /* XXX How to handle this? */ break; case 'E': -#ifdef _NL_CURRENT +#ifdef __UCLIBC_HAS_LOCALE__ switch (*fmt++) { case 'c': @@ -968,7 +974,7 @@ char * strptime (buf, format, tm) { enum locale_status decided; -#ifdef _NL_CURRENT +#ifdef __UCLIBC_HAS_LOCALE__ decided = not; #else decided = raw; diff --git a/libc/misc/time/tm_conv.c b/libc/misc/time/tm_conv.c index af82115e2..f73c96f07 100644 --- a/libc/misc/time/tm_conv.c +++ b/libc/misc/time/tm_conv.c @@ -1,79 +1,50 @@ -#if 0 -#include <time.h> - -/* This is a translation from ALGOL in Collected Algorithms of CACM. */ -/* Copied from Algorithm 199, Author: Robert G. Tantzen */ - -void __tm_conv(tmbuf, timep, offset) -struct tm *tmbuf; -time_t *timep; -time_t offset; -{ - static int moffset[] = - { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 }; +/* This is adapted from glibc */ +/* Copyright (C) 1991, 1993 Free Software Foundation, Inc */ - long s; - long j, d, m, y; +#define SECS_PER_HOUR 3600L +#define SECS_PER_DAY 86400L - offset += *timep; +#include <features.h> +#include <time.h> +#include <sys/types.h> - tmbuf->tm_isdst = 0; /* Someone else can set this */ +/* This structure contains all the information about a + timezone given in the POSIX standard TZ envariable. */ +typedef struct +{ + const char *name; - j = offset / 86400L + 719469; - s = offset % 86400L; + /* When to change. */ + enum { J0, J1, M } type; /* Interpretation of: */ + unsigned short int m, n, d; /* Month, week, day. */ + unsigned int secs; /* Time of day. */ - if (s < 0) { - s += 86400L; - j--; - } + long int offset; /* Seconds east of GMT (west if < 0). */ - tmbuf->tm_sec = s % 60; - tmbuf->tm_min = (s / 60) % 60; - tmbuf->tm_hour = s / 3600; - - tmbuf->tm_wday = (j + 2) % 7; - - /* - * Julian date converter. Takes a julian date (the number of days since - * some distant epoch or other), and fills tmbuf. - */ - - y = (4L * j - 1L) / 146097L; - j = 4L * j - 1L - 146097L * y; - d = j / 4L; - j = (4L * d + 3L) / 1461L; - d = 4L * d + 3L - 1461L * j; - d = (d + 4L) / 4L; - m = (5L * d - 3L) / 153L; - d = 5L * d - 3 - 153L * m; - d = (d + 5L) / 5L; - y = 100L * y + j; - if (m < 10) - m += 2; - else { - m -= 10; - ++y; - } + /* We cache the computed time of change for a + given year so we don't have to recompute it. */ + time_t change; /* When to change to this zone. */ + int computed_for; /* Year above is computed for. */ +} tz_rule; - tmbuf->tm_year = y - 1900; - tmbuf->tm_mon = m; - tmbuf->tm_mday = d; +/* tz_rules[0] is standard, tz_rules[1] is daylight. */ +static tz_rule tz_rules[2]; - tmbuf->tm_yday = d + moffset[m]; - if (m > 1 && ((y) % 4 == 0 && ((y) % 100 != 0 || (y) % 400 == 0))) - tmbuf->tm_yday++; +/* Warning -- this function is a stub andd always does UTC + * no matter what it is given */ +void tzset (void) +{ + tz_rules[0].name = tz_rules[1].name = "UTC"; + tz_rules[0].type = tz_rules[1].type = J0; + tz_rules[0].m = tz_rules[0].n = tz_rules[0].d = 0; + tz_rules[1].m = tz_rules[1].n = tz_rules[1].d = 0; + tz_rules[0].secs = tz_rules[1].secs = 0; + tz_rules[0].offset = tz_rules[1].offset = 0L; + tz_rules[0].change = tz_rules[1].change = (time_t) -1; + tz_rules[0].computed_for = tz_rules[1].computed_for = 0; } -#else - -/* This is adapted from glibc */ -/* Copyright (C) 1991, 1993 Free Software Foundation, Inc */ - -#define SECS_PER_HOUR 3600L -#define SECS_PER_DAY 86400L - -#include <time.h> static const unsigned short int __mon_lengths[2][12] = { /* Normal years. */ @@ -82,11 +53,9 @@ static const unsigned short int __mon_lengths[2][12] = { {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31} }; -void __tm_conv(tmbuf, t, offset) -struct tm *tmbuf; -time_t *t; -time_t offset; +void __tm_conv(struct tm *tmbuf, time_t *t, time_t offset) { + int isdst; long days, rem; register int y; register const unsigned short int *ip; @@ -128,7 +97,9 @@ time_t offset; days -= ip[y]; tmbuf->tm_mon = y; tmbuf->tm_mday = days + 1; - tmbuf->tm_isdst = -1; + isdst = (*t >= tz_rules[0].change && *t < tz_rules[1].change); + tmbuf->tm_isdst = isdst; + tmbuf->tm_zone = tzname[isdst]; + } -#endif |