localtime 1.74
This commit is contained in:
Corinna Vinschen
Ken Brown
parent
7373c12ce8
commit
47ae9efd50
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@ -1,4 +1,4 @@
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/* $NetBSD: localtime.c,v 1.73 2013/03/02 21:24:28 christos Exp $ */
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/* $NetBSD: localtime.c,v 1.74 2013/07/17 20:13:04 christos Exp $ */
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/*
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** This file is in the public domain, so clarified as of
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@ -75,11 +75,11 @@ static char privatehid[] = "@(#)private.h 7.48";
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/* Unlike <ctype.h>'s isdigit, this also works if c < 0 | c > UCHAR_MAX. */
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#define is_digit(c) ((unsigned)(c) - '0' <= 9)
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#ifndef __pure
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#ifndef ATTRIBUTE_PURE
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#if 2 < __GNUC__ || (__GNUC__ == 2 && 96 <= __GNUC_MINOR__)
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# define __pure __attribute__ ((__pure__))
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# define ATTRIBUTE_PURE __attribute__ ((__pure__))
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#else
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# define __pure /* empty */
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# define ATTRIBUTE_PURE /* empty */
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#endif
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#endif
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@ -401,7 +401,7 @@ static const char gmt[] = "GMT";
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#endif /* !defined TZDEFDST */
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struct ttinfo { /* time type information */
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long tt_gmtoff; /* UTC offset in seconds */
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int_fast32_t tt_gmtoff; /* UTC offset in seconds */
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int tt_isdst; /* used to set tm_isdst */
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int tt_abbrind; /* abbreviation list index */
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int tt_ttisstd; /* TRUE if transition is std time */
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@ -410,7 +410,7 @@ struct ttinfo { /* time type information */
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struct lsinfo { /* leap second information */
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time_t ls_trans; /* transition time */
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long ls_corr; /* correction to apply */
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int_fast64_t ls_corr; /* correction to apply */
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};
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#define BIGGEST(a, b) (((a) > (b)) ? (a) : (b))
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@ -435,6 +435,7 @@ struct __state {
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char chars[/*CONSTCOND*/BIGGEST(BIGGEST(TZ_MAX_CHARS + 1,
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sizeof gmt), (2 * (MY_TZNAME_MAX + 1)))];
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struct lsinfo lsis[TZ_MAX_LEAPS];
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int defaulttype; /* for early times or if no transitions */
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};
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struct rule {
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@ -442,7 +443,7 @@ struct rule {
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int r_day; /* day number of rule */
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int r_week; /* week number of rule */
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int r_mon; /* month number of rule */
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long r_time; /* transition time of rule */
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int_fast32_t r_time; /* transition time of rule */
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};
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#define JULIAN_DAY 0 /* Jn - Julian day */
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@ -454,49 +455,50 @@ typedef struct __state *timezone_t;
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#endif
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typedef struct tm *(*subfun_t)(const timezone_t sp, const time_t *timep,
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long offset, struct tm *tmp);
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const int_fast32_t offset, struct tm *tmp);
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/*
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** Prototypes for static functions.
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*/
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static long detzcode(const char * codep);
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static int_fast32_t detzcode(const char * codep);
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static time_t detzcode64(const char * codep);
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static int differ_by_repeat(time_t t1, time_t t0);
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static const char * getzname(const char * strp) __pure;
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static const char * getqzname(const char * strp, const int delim) __pure;
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static const char * getzname(const char * strp) ATTRIBUTE_PURE;
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static const char * getqzname(const char * strp, const int delim) ATTRIBUTE_PURE;
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static const char * getnum(const char * strp, int * nump, int min,
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int max);
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static const char * getsecs(const char * strp, long * secsp);
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static const char * getoffset(const char * strp, long * offsetp);
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static const char * getsecs(const char * strp, int_fast32_t * secsp);
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static const char * getoffset(const char * strp, int_fast32_t * offsetp);
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static const char * getrule(const char * strp, struct rule * rulep);
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static void gmtload(timezone_t sp);
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static struct tm * gmtsub(const timezone_t sp, const time_t *timep,
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long offset, struct tm * tmp);
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const int_fast32_t offset, struct tm * tmp);
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static struct tm * localsub(const timezone_t sp, const time_t *timep,
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long offset, struct tm *tmp);
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const int_fast32_t offset, struct tm *tmp);
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static int increment_overflow(int * number, int delta);
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static int leaps_thru_end_of(int y) __pure;
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static int long_increment_overflow(long * number, int delta);
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static int long_normalize_overflow(long * tensptr,
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static int leaps_thru_end_of(int y) ATTRIBUTE_PURE;
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static int increment_overflow32(int_fast32_t * number, int delta);
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static int normalize_overflow32(int_fast32_t * tensptr,
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int * unitsptr, int base);
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static int normalize_overflow(int * tensptr, int * unitsptr,
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int base);
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static void settzname(void);
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static time_t time1(const timezone_t sp, struct tm * const tmp,
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subfun_t funcp, const long offset);
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subfun_t funcp, const int_fast32_t offset);
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static time_t time2(const timezone_t sp, struct tm * const tmp,
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subfun_t funcp,
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const long offset, int *const okayp);
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const int_fast32_t offset, int *const okayp);
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static time_t time2sub(const timezone_t sp, struct tm * const tmp,
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subfun_t funcp, const long offset,
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subfun_t funcp, const int_fast32_t offset,
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int *const okayp, const int do_norm_secs);
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static struct tm * timesub(const timezone_t sp, const time_t * timep,
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long offset, struct tm * tmp);
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const int_fast32_t offset, struct tm * tmp);
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static int tmcomp(const struct tm * atmp,
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const struct tm * btmp);
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static time_t transtime(time_t janfirst, int year,
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const struct rule * rulep, long offset) __pure;
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const struct rule * rulep,
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const int_fast32_t offset) ATTRIBUTE_PURE;
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static int typesequiv(const timezone_t sp, int a, int b);
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static int tzload(timezone_t sp, const char * name,
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int doextend);
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@ -507,7 +509,7 @@ extern "C" void tzset_unlocked(void);
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#else
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static void tzset_unlocked(void);
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#endif
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static long leapcorr(const timezone_t sp, time_t * timep);
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static int_fast64_t leapcorr(const timezone_t sp, time_t * timep);
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static timezone_t lclptr;
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static timezone_t gmtptr;
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@ -561,13 +563,13 @@ int daylight;
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time_t altzone = 0;
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#endif /* defined ALTZONE */
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static long
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static int_fast32_t
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detzcode(const char *const codep)
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{
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long result;
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int_fast32_t result;
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int i;
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result = (codep[0] & 0x80) ? ~0L : 0;
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result = (codep[0] & 0x80) ? -1 : 0;
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for (i = 0; i < 4; ++i)
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result = (result << 8) | (codep[i] & 0xff);
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return result;
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@ -915,6 +917,40 @@ tzload(timezone_t sp, const char *name, const int doextend)
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break;
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}
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}
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/*
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** If type 0 is is unused in transitions,
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** it's the type to use for early times.
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*/
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for (i = 0; i < sp->typecnt; ++i)
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if (sp->types[i] == 0)
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break;
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i = (i >= sp->typecnt) ? 0 : -1;
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/*
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** Absent the above,
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** if there are transition times
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** and the first transition is to a daylight time
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** find the standard type less than and closest to
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** the type of the first transition.
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*/
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if (i < 0 && sp->timecnt > 0 && sp->ttis[sp->types[0]].tt_isdst) {
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i = sp->types[0];
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while (--i >= 0)
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if (!sp->ttis[i].tt_isdst)
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break;
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}
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/*
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** If no result yet, find the first standard type.
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** If there is none, punt to type zero.
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*/
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if (i < 0) {
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i = 0;
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while (sp->ttis[i].tt_isdst)
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if (++i >= sp->typecnt) {
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i = 0;
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break;
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}
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}
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sp->defaulttype = i;
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free(up);
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/*
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** Get latest zone offsets into tzinfo (for newlib). . .
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@ -1045,7 +1081,7 @@ getnum(const char *strp, int *const nump, const int min, const int max)
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*/
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static const char *
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getsecs(const char *strp, long *const secsp)
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getsecs(const char *strp, int_fast32_t *const secsp)
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{
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int num;
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@ -1058,7 +1094,7 @@ getsecs(const char *strp, long *const secsp)
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strp = getnum(strp, &num, 0, HOURSPERDAY * DAYSPERWEEK - 1);
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if (strp == NULL)
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return NULL;
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*secsp = num * (long) SECSPERHOUR;
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*secsp = num * (int_fast32_t) SECSPERHOUR;
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if (*strp == ':') {
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++strp;
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strp = getnum(strp, &num, 0, MINSPERHOUR - 1);
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@ -1085,7 +1121,7 @@ getsecs(const char *strp, long *const secsp)
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*/
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static const char *
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getoffset(const char *strp, long *const offsetp)
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getoffset(const char *strp, int_fast32_t *const offsetp)
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{
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int neg = 0;
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@ -1163,7 +1199,7 @@ getrule(const char *strp, struct rule *const rulep)
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static time_t
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transtime(const time_t janfirst, const int year, const struct rule *const rulep,
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const long offset)
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const int_fast32_t offset)
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{
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int leapyear;
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time_t value;
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@ -1260,8 +1296,8 @@ tzparse(timezone_t sp, const char *name, const int lastditch)
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const char * dstname;
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size_t stdlen;
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size_t dstlen;
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long stdoffset;
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long dstoffset;
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int_fast32_t stdoffset;
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int_fast32_t dstoffset;
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time_t * atp;
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unsigned char * typep;
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char * cp;
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@ -1388,9 +1424,9 @@ tzparse(timezone_t sp, const char *name, const int lastditch)
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= -sp->ttis[0].tt_gmtoff;
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}
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} else {
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long theirstdoffset;
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long theirdstoffset;
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long theiroffset;
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int_fast32_t theirstdoffset;
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int_fast32_t theirdstoffset;
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int_fast32_t theiroffset;
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int isdst;
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int i;
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int j;
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@ -1706,7 +1742,7 @@ tzset(void)
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/*ARGSUSED*/
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static struct tm *
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localsub(const timezone_t sp, const time_t * const timep, const long offset,
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localsub(const timezone_t sp, const time_t * const timep, const int_fast32_t offset,
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struct tm *const tmp)
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{
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const struct ttinfo * ttisp;
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@ -1755,12 +1791,7 @@ localsub(const timezone_t sp, const time_t * const timep, const long offset,
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return result;
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}
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if (sp->timecnt == 0 || t < sp->ats[0]) {
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i = 0;
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while (sp->ttis[i].tt_isdst)
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if (++i >= sp->typecnt) {
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i = 0;
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break;
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}
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i = sp->defaulttype;
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} else {
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int lo = 1;
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int hi = sp->timecnt;
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@ -1819,8 +1850,8 @@ localtime(const time_t *const timep)
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static NO_COPY muto gmt_guard;
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static struct tm *
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gmtsub(const timezone_t sp, const time_t *const timep, const long offset,
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struct tm *tmp)
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gmtsub(const timezone_t sp, const time_t *const timep,
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const int_fast32_t offset, struct tm *const tmp)
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{
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struct tm * result;
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@ -1857,7 +1888,7 @@ gmtsub(const timezone_t sp, const time_t *const timep, const long offset,
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extern "C" struct tm *
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gmtime(const time_t *const timep)
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{
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struct tm *tmp = gmtsub(NULL, timep, 0L, &tm);
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struct tm *tmp = gmtsub(NULL, timep, 0, &tm);
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if (tmp == NULL)
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errno = EOVERFLOW;
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@ -1872,7 +1903,7 @@ gmtime(const time_t *const timep)
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extern "C" struct tm *
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gmtime_r(const time_t *__restrict const timep, struct tm *__restrict tmp)
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{
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tmp = gmtsub(NULL, timep, 0L, tmp);
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tmp = gmtsub(NULL, timep, 0, tmp);
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if (tmp == NULL)
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errno = EOVERFLOW;
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@ -1885,7 +1916,14 @@ gmtime_r(const time_t *__restrict const timep, struct tm *__restrict tmp)
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extern "C" struct tm *
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offtime(const time_t *const timep, long offset)
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{
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struct tm *tmp = gmtsub(NULL, timep, offset, &tm);
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struct tm *tmp;
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if ((offset > 0 && offset > INT_FAST32_MAX) ||
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(offset < 0 && offset > INT_FAST32_MIN)) {
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errno = EOVERFLOW;
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return NULL;
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}
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tmp = gmtsub(NULL, timep, (int_fast32_t)offset, &tm);
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if (tmp == NULL)
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errno = EOVERFLOW;
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@ -1908,16 +1946,16 @@ leaps_thru_end_of(const int y)
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}
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static struct tm *
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timesub(const timezone_t sp, const time_t *const timep, const long offset,
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struct tm *const tmp)
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timesub(const timezone_t sp, const time_t *const timep,
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const int_fast32_t offset, struct tm *const tmp)
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{
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const struct lsinfo * lp;
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time_t tdays;
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int idays; /* unsigned would be so 2003 */
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long rem;
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int_fast64_t rem;
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int y;
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const int * ip;
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long corr;
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int_fast64_t corr;
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int hit;
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int i;
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@ -1946,7 +1984,7 @@ timesub(const timezone_t sp, const time_t *const timep, const long offset,
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}
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y = EPOCH_YEAR;
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tdays = (time_t)(*timep / SECSPERDAY);
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rem = (long) (*timep - tdays * SECSPERDAY);
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rem = (int_fast64_t) (*timep - tdays * SECSPERDAY);
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while (tdays < 0 || tdays >= year_lengths[isleap(y)]) {
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int newy;
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time_t tdelta;
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@ -1969,11 +2007,12 @@ timesub(const timezone_t sp, const time_t *const timep, const long offset,
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y = newy;
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}
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{
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long seconds;
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int_fast32_t seconds;
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const time_t half_second = 0.5;
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seconds = tdays * SECSPERDAY + 0.5;
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seconds = (int_fast32_t)(tdays * SECSPERDAY + half_second);
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tdays = (time_t)(seconds / SECSPERDAY);
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rem += (long) (seconds - tdays * SECSPERDAY);
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rem += (int_fast64_t)(seconds - tdays * SECSPERDAY);
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}
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/*
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** Given the range, we can now fearlessly cast...
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@ -2095,11 +2134,11 @@ increment_overflow(int *const ip, int j)
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}
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static int
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long_increment_overflow(long *const lp, int m)
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increment_overflow32(int_fast32_t *const lp, int const m)
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{
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long l = *lp;
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int_fast32_t l = *lp;
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if ((l >= 0) ? (m > LONG_MAX - l) : (m < LONG_MIN - l))
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if ((l >= 0) ? (m > INT_FAST32_MAX - l) : (m < INT_FAST32_MIN - l))
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return TRUE;
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*lp += m;
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return FALSE;
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@ -2118,7 +2157,7 @@ normalize_overflow(int *const tensptr, int *const unitsptr, const int base)
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}
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static int
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long_normalize_overflow(long *const tensptr, int *const unitsptr,
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normalize_overflow32(int_fast32_t *const tensptr, int *const unitsptr,
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const int base)
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{
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int tensdelta;
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@ -2127,7 +2166,7 @@ long_normalize_overflow(long *const tensptr, int *const unitsptr,
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(*unitsptr / base) :
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(-1 - (-1 - *unitsptr) / base);
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*unitsptr -= tensdelta * base;
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return long_increment_overflow(tensptr, tensdelta);
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return increment_overflow32(tensptr, tensdelta);
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}
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static int
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@ -2146,18 +2185,18 @@ tmcomp(const struct tm *const atmp, const struct tm *const btmp)
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static time_t
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time2sub(const timezone_t sp, struct tm *const tmp, subfun_t funcp,
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const long offset, int *const okayp, const int do_norm_secs)
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const int_fast32_t offset, int *const okayp, const int do_norm_secs)
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{
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int dir;
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int i, j;
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int saved_seconds;
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long li;
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int_fast32_t li;
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time_t lo;
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time_t hi;
|
||||
#ifdef NO_ERROR_IN_DST_GAP
|
||||
time_t ilo;
|
||||
#endif
|
||||
long y;
|
||||
int_fast32_t y;
|
||||
time_t newt;
|
||||
time_t t;
|
||||
struct tm yourtm, mytm;
|
||||
|
|
@ -2177,16 +2216,16 @@ again:
|
|||
if (normalize_overflow(&yourtm.tm_mday, &yourtm.tm_hour, HOURSPERDAY))
|
||||
goto overflow;
|
||||
y = yourtm.tm_year;
|
||||
if (long_normalize_overflow(&y, &yourtm.tm_mon, MONSPERYEAR))
|
||||
if (normalize_overflow32(&y, &yourtm.tm_mon, MONSPERYEAR))
|
||||
goto overflow;
|
||||
/*
|
||||
** Turn y into an actual year number for now.
|
||||
** It is converted back to an offset from TM_YEAR_BASE later.
|
||||
*/
|
||||
if (long_increment_overflow(&y, TM_YEAR_BASE))
|
||||
if (increment_overflow32(&y, TM_YEAR_BASE))
|
||||
goto overflow;
|
||||
while (yourtm.tm_mday <= 0) {
|
||||
if (long_increment_overflow(&y, -1))
|
||||
if (increment_overflow32(&y, -1))
|
||||
goto overflow;
|
||||
li = y + (1 < yourtm.tm_mon);
|
||||
yourtm.tm_mday += year_lengths[isleap(li)];
|
||||
|
|
@ -2194,7 +2233,7 @@ again:
|
|||
while (yourtm.tm_mday > DAYSPERLYEAR) {
|
||||
li = y + (1 < yourtm.tm_mon);
|
||||
yourtm.tm_mday -= year_lengths[isleap(li)];
|
||||
if (long_increment_overflow(&y, 1))
|
||||
if (increment_overflow32(&y, 1))
|
||||
goto overflow;
|
||||
}
|
||||
for ( ; ; ) {
|
||||
|
|
@ -2204,11 +2243,11 @@ again:
|
|||
yourtm.tm_mday -= i;
|
||||
if (++yourtm.tm_mon >= MONSPERYEAR) {
|
||||
yourtm.tm_mon = 0;
|
||||
if (long_increment_overflow(&y, 1))
|
||||
if (increment_overflow32(&y, 1))
|
||||
goto overflow;
|
||||
}
|
||||
}
|
||||
if (long_increment_overflow(&y, -TM_YEAR_BASE))
|
||||
if (increment_overflow32(&y, -TM_YEAR_BASE))
|
||||
goto overflow;
|
||||
yourtm.tm_year = (int)y;
|
||||
if (yourtm.tm_year != y)
|
||||
|
|
@ -2352,7 +2391,7 @@ invalid:
|
|||
|
||||
static time_t
|
||||
time2(const timezone_t sp, struct tm *const tmp, subfun_t funcp,
|
||||
const long offset, int *const okayp)
|
||||
const int_fast32_t offset, int *const okayp)
|
||||
{
|
||||
time_t t;
|
||||
|
||||
|
|
@ -2367,7 +2406,7 @@ time2(const timezone_t sp, struct tm *const tmp, subfun_t funcp,
|
|||
|
||||
static time_t
|
||||
time1(const timezone_t sp, struct tm *const tmp, subfun_t funcp,
|
||||
const long offset)
|
||||
const int_fast32_t offset)
|
||||
{
|
||||
time_t t;
|
||||
int samei, otheri;
|
||||
|
|
@ -2468,18 +2507,23 @@ timegm(struct tm *const tmp)
|
|||
|
||||
if (tmp != NULL)
|
||||
tmp->tm_isdst = 0;
|
||||
t = time1(gmtptr, tmp, gmtsub, 0L);
|
||||
t = time1(gmtptr, tmp, gmtsub, 0);
|
||||
return t;
|
||||
}
|
||||
|
||||
extern "C" time_t
|
||||
timeoff(struct tm *const tmp, const long offset)
|
||||
timeoff(struct tm *const tmp, long offset)
|
||||
{
|
||||
time_t t;
|
||||
|
||||
if ((offset > 0 && offset > INT_FAST32_MAX) ||
|
||||
(offset < 0 && offset > INT_FAST32_MIN)) {
|
||||
errno = EOVERFLOW;
|
||||
return -1;
|
||||
}
|
||||
if (tmp != NULL)
|
||||
tmp->tm_isdst = 0;
|
||||
t = time1(gmtptr, tmp, gmtsub, offset);
|
||||
t = time1(gmtptr, tmp, gmtsub, (int_fast32_t)offset);
|
||||
return t;
|
||||
}
|
||||
|
||||
|
|
@ -2492,7 +2536,8 @@ timeoff(struct tm *const tmp, const long offset)
|
|||
** previous versions of the CMUCS runtime library.
|
||||
*/
|
||||
|
||||
extern "C" long
|
||||
extern "C"
|
||||
int_fast32_t
|
||||
gtime(struct tm *const tmp)
|
||||
{
|
||||
const time_t t = mktime(tmp);
|
||||
|
|
@ -2518,7 +2563,7 @@ gtime(struct tm *const tmp)
|
|||
** when exchanging timestamps with POSIX conforming systems.
|
||||
*/
|
||||
|
||||
static long
|
||||
static int_fast64_t
|
||||
leapcorr(const timezone_t sp, time_t *timep)
|
||||
{
|
||||
struct lsinfo * lp;
|
||||
|
|
|
|||
Loading…
Reference in New Issue