154e2026c8
The mktime API returned an uncorrect time when TZ is set as empty. A timezone UTC/GMT+0 should be implied in the empty case. However mktime keeps previous information about timezone. If mktime was called with a timezone which has DST before, the "defaulttype" member of "state" structure wouldn't be 0. Then it would be used next time, even though UTC/GMT+0 doesn't have DST. Added initialization of the "defaulttype" in the empty TZ case. Change-Id: Ic480c63c548c05444134e0aefb30a7b380e3f40b
2312 lines
69 KiB
C
2312 lines
69 KiB
C
/*
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** This file is in the public domain, so clarified as of
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** 1996-06-05 by Arthur David Olson.
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*/
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/*
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** Leap second handling from Bradley White.
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** POSIX-style TZ environment variable handling from Guy Harris.
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*/
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/*LINTLIBRARY*/
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#include "private.h"
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#include "tzfile.h"
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#include "fcntl.h"
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#ifndef TZ_ABBR_MAX_LEN
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#define TZ_ABBR_MAX_LEN 16
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#endif /* !defined TZ_ABBR_MAX_LEN */
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#ifndef TZ_ABBR_CHAR_SET
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#define TZ_ABBR_CHAR_SET \
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"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 :+-._"
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#endif /* !defined TZ_ABBR_CHAR_SET */
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#ifndef TZ_ABBR_ERR_CHAR
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#define TZ_ABBR_ERR_CHAR '_'
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#endif /* !defined TZ_ABBR_ERR_CHAR */
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/*
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** SunOS 4.1.1 headers lack O_BINARY.
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*/
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#ifdef O_BINARY
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#define OPEN_MODE (O_RDONLY | O_BINARY)
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#endif /* defined O_BINARY */
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#ifndef O_BINARY
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#define OPEN_MODE O_RDONLY
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#endif /* !defined O_BINARY */
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#if 0
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# define XLOG(xx) printf xx , fflush(stdout)
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#else
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# define XLOG(x) do{}while (0)
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#endif
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/* BEGIN android-added: thread-safety. */
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#include <pthread.h>
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static pthread_mutex_t _tzMutex = PTHREAD_MUTEX_INITIALIZER;
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static inline void _tzLock(void) { pthread_mutex_lock(&_tzMutex); }
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static inline void _tzUnlock(void) { pthread_mutex_unlock(&_tzMutex); }
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/* END android-added */
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#ifndef WILDABBR
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/*
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** Someone might make incorrect use of a time zone abbreviation:
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** 1. They might reference tzname[0] before calling tzset (explicitly
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** or implicitly).
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** 2. They might reference tzname[1] before calling tzset (explicitly
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** or implicitly).
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** 3. They might reference tzname[1] after setting to a time zone
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** in which Daylight Saving Time is never observed.
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** 4. They might reference tzname[0] after setting to a time zone
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** in which Standard Time is never observed.
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** 5. They might reference tm.TM_ZONE after calling offtime.
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** What's best to do in the above cases is open to debate;
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** for now, we just set things up so that in any of the five cases
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** WILDABBR is used. Another possibility: initialize tzname[0] to the
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** string "tzname[0] used before set", and similarly for the other cases.
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** And another: initialize tzname[0] to "ERA", with an explanation in the
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** manual page of what this "time zone abbreviation" means (doing this so
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** that tzname[0] has the "normal" length of three characters).
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*/
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#define WILDABBR " "
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#endif /* !defined WILDABBR */
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static const char wildabbr[] = WILDABBR;
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static const char gmt[] = "GMT";
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/*
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** The DST rules to use if TZ has no rules and we can't load TZDEFRULES.
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** We default to US rules as of 1999-08-17.
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** POSIX 1003.1 section 8.1.1 says that the default DST rules are
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** implementation dependent; for historical reasons, US rules are a
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** common default.
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*/
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#ifndef TZDEFRULESTRING
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#define TZDEFRULESTRING ",M4.1.0,M10.5.0"
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#endif /* !defined TZDEFDST */
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struct ttinfo { /* time type information */
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int_fast32_t tt_gmtoff; /* UT 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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int tt_ttisgmt; /* TRUE if transition is UT */
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};
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struct lsinfo { /* leap second information */
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time_t ls_trans; /* transition time */
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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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#ifdef TZNAME_MAX
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#define MY_TZNAME_MAX TZNAME_MAX
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#endif /* defined TZNAME_MAX */
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#ifndef TZNAME_MAX
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#define MY_TZNAME_MAX 255
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#endif /* !defined TZNAME_MAX */
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struct state {
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int leapcnt;
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int timecnt;
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int typecnt;
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int charcnt;
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int goback;
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int goahead;
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time_t ats[TZ_MAX_TIMES];
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unsigned char types[TZ_MAX_TIMES];
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struct ttinfo ttis[TZ_MAX_TYPES];
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char chars[BIGGEST(BIGGEST(TZ_MAX_CHARS + 1, sizeof gmt),
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(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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int r_type; /* type of rule; see below */
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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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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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#define DAY_OF_YEAR 1 /* n = day of year */
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#define MONTH_NTH_DAY_OF_WEEK 2 /* Mm.n.d = month, week, day of week */
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/*
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** Prototypes for static functions.
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*/
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/* NOTE: all internal functions assume that _tzLock() was already called */
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static int __bionic_open_tzdata(const char*, int*);
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static int_fast32_t detzcode(const char * codep);
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static int_fast64_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) ATTRIBUTE_PURE;
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static const char * getqzname(const char * strp, const int delim)
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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, 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(struct state * sp);
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static struct tm * gmtsub(const time_t * timep, int_fast32_t offset,
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struct tm * tmp, struct state * sp); // android-changed: added sp.
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static struct tm * localsub(const time_t * timep, int_fast32_t offset,
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struct tm * tmp, struct state * sp); // android-changed: added sp.
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static int increment_overflow(int * number, int delta);
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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 increment_overflow_time(time_t *t, int_fast32_t 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(struct tm * tmp,
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struct tm * (*funcp)(const time_t *,
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int_fast32_t, struct tm *, struct state *), // android-changed: added state*.
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int_fast32_t, struct state * sp); // android-changed: added sp.
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static time_t time2(struct tm * tmp,
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struct tm * (*funcp)(const time_t *,
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int_fast32_t, struct tm*, struct state *), // android-changed: added state*.
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int_fast32_t offset, int * okayp, struct state * sp); // android-changed: added sp.
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static time_t time2sub(struct tm *tmp,
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struct tm * (*funcp) (const time_t *,
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int_fast32_t, struct tm*, struct state *), // android-changed: added state*.
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int_fast32_t offset, int * okayp, int do_norm_secs, struct state * sp); // android-change: added sp.
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static struct tm * timesub(const time_t * timep, int_fast32_t offset,
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const struct state * sp, 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 int_fast32_t transtime(int year, const struct rule * rulep,
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int_fast32_t offset)
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ATTRIBUTE_PURE;
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static int typesequiv(const struct state * sp, int a, int b);
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static int tzload(const char * name, struct state * sp,
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int doextend);
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static int tzparse(const char * name, struct state * sp,
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int lastditch);
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#ifdef ALL_STATE
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static struct state * lclptr;
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static struct state * gmtptr;
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#endif /* defined ALL_STATE */
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#ifndef ALL_STATE
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static struct state lclmem;
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static struct state gmtmem;
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#define lclptr (&lclmem)
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#define gmtptr (&gmtmem)
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#endif /* State Farm */
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#ifndef TZ_STRLEN_MAX
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#define TZ_STRLEN_MAX 255
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#endif /* !defined TZ_STRLEN_MAX */
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static char lcl_TZname[TZ_STRLEN_MAX + 1];
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static int lcl_is_set;
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static int gmt_is_set;
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char * tzname[2] = {
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(char *) wildabbr,
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(char *) wildabbr
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};
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/*
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** Section 4.12.3 of X3.159-1989 requires that
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** Except for the strftime function, these functions [asctime,
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** ctime, gmtime, localtime] return values in one of two static
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** objects: a broken-down time structure and an array of char.
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** Thanks to Paul Eggert for noting this.
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*/
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static struct tm tmGlobal;
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#ifdef USG_COMPAT
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long timezone = 0;
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int daylight = 0;
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#endif /* defined USG_COMPAT */
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#ifdef ALTZONE
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long altzone = 0;
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#endif /* defined ALTZONE */
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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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register int_fast32_t result;
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register int i;
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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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}
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static int_fast64_t
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detzcode64(const char *const codep)
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{
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register int_fast64_t result;
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register int i;
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result = (codep[0] & 0x80) ? -1 : 0;
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for (i = 0; i < 8; ++i)
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result = (result << 8) | (codep[i] & 0xff);
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return result;
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}
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static void
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settzname(void)
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{
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register struct state * const sp = lclptr;
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register int i;
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tzname[0] = tzname[1] = (char *) wildabbr;
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#ifdef USG_COMPAT
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daylight = 0;
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timezone = 0;
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#endif /* defined USG_COMPAT */
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#ifdef ALTZONE
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altzone = 0;
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#endif /* defined ALTZONE */
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if (sp == NULL) {
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tzname[0] = tzname[1] = (char *) gmt;
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return;
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}
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/*
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** And to get the latest zone names into tzname. . .
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*/
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for (i = 0; i < sp->typecnt; ++i) {
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register const struct ttinfo * const ttisp = &sp->ttis[i];
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tzname[ttisp->tt_isdst] = &sp->chars[ttisp->tt_abbrind];
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}
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for (i = 0; i < sp->timecnt; ++i) {
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register const struct ttinfo * const ttisp =
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&sp->ttis[
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sp->types[i]];
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tzname[ttisp->tt_isdst] =
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&sp->chars[ttisp->tt_abbrind];
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#ifdef USG_COMPAT
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if (ttisp->tt_isdst)
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daylight = 1;
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if (!ttisp->tt_isdst)
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timezone = -(ttisp->tt_gmtoff);
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#endif /* defined USG_COMPAT */
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#ifdef ALTZONE
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if (ttisp->tt_isdst)
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altzone = -(ttisp->tt_gmtoff);
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#endif /* defined ALTZONE */
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}
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/*
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** Finally, scrub the abbreviations.
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** First, replace bogus characters.
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*/
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for (i = 0; i < sp->charcnt; ++i)
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if (strchr(TZ_ABBR_CHAR_SET, sp->chars[i]) == NULL)
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sp->chars[i] = TZ_ABBR_ERR_CHAR;
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/*
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** Second, truncate long abbreviations.
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*/
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for (i = 0; i < sp->typecnt; ++i) {
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register const struct ttinfo * const ttisp = &sp->ttis[i];
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register char * cp = &sp->chars[ttisp->tt_abbrind];
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if (strlen(cp) > TZ_ABBR_MAX_LEN &&
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strcmp(cp, GRANDPARENTED) != 0)
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*(cp + TZ_ABBR_MAX_LEN) = '\0';
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}
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}
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static int
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differ_by_repeat(const time_t t1 __unused, const time_t t0 __unused)
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{
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if (TYPE_BIT(time_t) - TYPE_SIGNED(time_t) < SECSPERREPEAT_BITS)
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return 0;
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#if defined(__LP64__) // 32-bit Android only has a signed 32-bit time_t; 64-bit Android is fixed.
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return t1 - t0 == SECSPERREPEAT;
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#endif
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}
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static int
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tzload(register const char* name, register struct state* const sp,
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register const int doextend)
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{
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register const char * p;
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register int i;
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register int fid;
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register int stored;
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register int nread;
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typedef union {
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struct tzhead tzhead;
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char buf[2 * sizeof(struct tzhead) +
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2 * sizeof *sp +
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4 * TZ_MAX_TIMES];
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} u_t;
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union local_storage {
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/*
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** Section 4.9.1 of the C standard says that
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** "FILENAME_MAX expands to an integral constant expression
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** that is the size needed for an array of char large enough
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** to hold the longest file name string that the implementation
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** guarantees can be opened."
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*/
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//char fullname[FILENAME_MAX + 1];
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|
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/* The main part of the storage for this function. */
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struct {
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u_t u;
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struct state st;
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} u;
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};
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//register char *fullname;
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register u_t *up;
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register union local_storage *lsp;
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#ifdef ALL_STATE
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lsp = malloc(sizeof *lsp);
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if (!lsp)
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return -1;
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#else /* !defined ALL_STATE */
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union local_storage ls;
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lsp = &ls;
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#endif /* !defined ALL_STATE */
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//fullname = lsp->fullname;
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up = &lsp->u.u;
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sp->goback = sp->goahead = FALSE;
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|
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if (! name) {
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name = TZDEFAULT;
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if (! name)
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goto oops;
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}
|
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|
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int toread;
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fid = __bionic_open_tzdata(name, &toread);
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if (fid < 0)
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goto oops;
|
|
|
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nread = read(fid, up->buf, sizeof up->buf);
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if (close(fid) < 0 || nread <= 0)
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goto oops;
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for (stored = 4; stored <= 8; stored *= 2) {
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int ttisstdcnt;
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int ttisgmtcnt;
|
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int timecnt;
|
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|
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ttisstdcnt = (int) detzcode(up->tzhead.tzh_ttisstdcnt);
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ttisgmtcnt = (int) detzcode(up->tzhead.tzh_ttisgmtcnt);
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sp->leapcnt = (int) detzcode(up->tzhead.tzh_leapcnt);
|
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sp->timecnt = (int) detzcode(up->tzhead.tzh_timecnt);
|
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sp->typecnt = (int) detzcode(up->tzhead.tzh_typecnt);
|
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sp->charcnt = (int) detzcode(up->tzhead.tzh_charcnt);
|
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p = up->tzhead.tzh_charcnt + sizeof up->tzhead.tzh_charcnt;
|
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if (sp->leapcnt < 0 || sp->leapcnt > TZ_MAX_LEAPS ||
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sp->typecnt <= 0 || sp->typecnt > TZ_MAX_TYPES ||
|
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sp->timecnt < 0 || sp->timecnt > TZ_MAX_TIMES ||
|
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sp->charcnt < 0 || sp->charcnt > TZ_MAX_CHARS ||
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(ttisstdcnt != sp->typecnt && ttisstdcnt != 0) ||
|
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(ttisgmtcnt != sp->typecnt && ttisgmtcnt != 0))
|
|
goto oops;
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if (nread - (p - up->buf) <
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sp->timecnt * stored + /* ats */
|
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sp->timecnt + /* types */
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sp->typecnt * 6 + /* ttinfos */
|
|
sp->charcnt + /* chars */
|
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sp->leapcnt * (stored + 4) + /* lsinfos */
|
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ttisstdcnt + /* ttisstds */
|
|
ttisgmtcnt) /* ttisgmts */
|
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goto oops;
|
|
timecnt = 0;
|
|
for (i = 0; i < sp->timecnt; ++i) {
|
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int_fast64_t at
|
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= stored == 4 ? detzcode(p) : detzcode64(p);
|
|
sp->types[i] = ((TYPE_SIGNED(time_t)
|
|
? time_t_min <= at
|
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: 0 <= at)
|
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&& at <= time_t_max);
|
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if (sp->types[i]) {
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if (i && !timecnt && at != time_t_min) {
|
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/*
|
|
** Keep the earlier record, but tweak
|
|
** it so that it starts with the
|
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** minimum time_t value.
|
|
*/
|
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sp->types[i - 1] = 1;
|
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sp->ats[timecnt++] = time_t_min;
|
|
}
|
|
sp->ats[timecnt++] = at;
|
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}
|
|
p += stored;
|
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}
|
|
timecnt = 0;
|
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for (i = 0; i < sp->timecnt; ++i) {
|
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unsigned char typ = *p++;
|
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if (sp->typecnt <= typ)
|
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goto oops;
|
|
if (sp->types[i])
|
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sp->types[timecnt++] = typ;
|
|
}
|
|
sp->timecnt = timecnt;
|
|
for (i = 0; i < sp->typecnt; ++i) {
|
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register struct ttinfo * ttisp;
|
|
|
|
ttisp = &sp->ttis[i];
|
|
ttisp->tt_gmtoff = detzcode(p);
|
|
p += 4;
|
|
ttisp->tt_isdst = (unsigned char) *p++;
|
|
if (ttisp->tt_isdst != 0 && ttisp->tt_isdst != 1)
|
|
goto oops;
|
|
ttisp->tt_abbrind = (unsigned char) *p++;
|
|
if (ttisp->tt_abbrind < 0 ||
|
|
ttisp->tt_abbrind > sp->charcnt)
|
|
goto oops;
|
|
}
|
|
for (i = 0; i < sp->charcnt; ++i)
|
|
sp->chars[i] = *p++;
|
|
sp->chars[i] = '\0'; /* ensure '\0' at end */
|
|
for (i = 0; i < sp->leapcnt; ++i) {
|
|
register struct lsinfo * lsisp;
|
|
|
|
lsisp = &sp->lsis[i];
|
|
lsisp->ls_trans = (stored == 4) ?
|
|
detzcode(p) : detzcode64(p);
|
|
p += stored;
|
|
lsisp->ls_corr = detzcode(p);
|
|
p += 4;
|
|
}
|
|
for (i = 0; i < sp->typecnt; ++i) {
|
|
register struct ttinfo * ttisp;
|
|
|
|
ttisp = &sp->ttis[i];
|
|
if (ttisstdcnt == 0)
|
|
ttisp->tt_ttisstd = FALSE;
|
|
else {
|
|
ttisp->tt_ttisstd = *p++;
|
|
if (ttisp->tt_ttisstd != TRUE &&
|
|
ttisp->tt_ttisstd != FALSE)
|
|
goto oops;
|
|
}
|
|
}
|
|
for (i = 0; i < sp->typecnt; ++i) {
|
|
register struct ttinfo * ttisp;
|
|
|
|
ttisp = &sp->ttis[i];
|
|
if (ttisgmtcnt == 0)
|
|
ttisp->tt_ttisgmt = FALSE;
|
|
else {
|
|
ttisp->tt_ttisgmt = *p++;
|
|
if (ttisp->tt_ttisgmt != TRUE &&
|
|
ttisp->tt_ttisgmt != FALSE)
|
|
goto oops;
|
|
}
|
|
}
|
|
/*
|
|
** If this is an old file, we're done.
|
|
*/
|
|
if (up->tzhead.tzh_version[0] == '\0')
|
|
break;
|
|
nread -= p - up->buf;
|
|
for (i = 0; i < nread; ++i)
|
|
up->buf[i] = p[i];
|
|
/*
|
|
** If this is a signed narrow time_t system, we're done.
|
|
*/
|
|
if (TYPE_SIGNED(time_t) && stored >= (int) sizeof(time_t))
|
|
break;
|
|
}
|
|
if (doextend && nread > 2 &&
|
|
up->buf[0] == '\n' && up->buf[nread - 1] == '\n' &&
|
|
sp->typecnt + 2 <= TZ_MAX_TYPES) {
|
|
struct state *ts = &lsp->u.st;
|
|
register int result;
|
|
|
|
up->buf[nread - 1] = '\0';
|
|
result = tzparse(&up->buf[1], ts, FALSE);
|
|
if (result == 0 && ts->typecnt == 2 &&
|
|
sp->charcnt + ts->charcnt <= TZ_MAX_CHARS) {
|
|
for (i = 0; i < 2; ++i)
|
|
ts->ttis[i].tt_abbrind +=
|
|
sp->charcnt;
|
|
for (i = 0; i < ts->charcnt; ++i)
|
|
sp->chars[sp->charcnt++] =
|
|
ts->chars[i];
|
|
i = 0;
|
|
while (i < ts->timecnt &&
|
|
ts->ats[i] <=
|
|
sp->ats[sp->timecnt - 1])
|
|
++i;
|
|
while (i < ts->timecnt &&
|
|
sp->timecnt < TZ_MAX_TIMES) {
|
|
sp->ats[sp->timecnt] =
|
|
ts->ats[i];
|
|
sp->types[sp->timecnt] =
|
|
sp->typecnt +
|
|
ts->types[i];
|
|
++sp->timecnt;
|
|
++i;
|
|
}
|
|
sp->ttis[sp->typecnt++] = ts->ttis[0];
|
|
sp->ttis[sp->typecnt++] = ts->ttis[1];
|
|
}
|
|
}
|
|
if (sp->timecnt > 1) {
|
|
for (i = 1; i < sp->timecnt; ++i)
|
|
if (typesequiv(sp, sp->types[i], sp->types[0]) &&
|
|
differ_by_repeat(sp->ats[i], sp->ats[0])) {
|
|
sp->goback = TRUE;
|
|
break;
|
|
}
|
|
for (i = sp->timecnt - 2; i >= 0; --i)
|
|
if (typesequiv(sp, sp->types[sp->timecnt - 1],
|
|
sp->types[i]) &&
|
|
differ_by_repeat(sp->ats[sp->timecnt - 1],
|
|
sp->ats[i])) {
|
|
sp->goahead = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
/*
|
|
** If type 0 is is unused in transitions,
|
|
** it's the type to use for early times.
|
|
*/
|
|
for (i = 0; i < sp->typecnt; ++i)
|
|
if (sp->types[i] == 0)
|
|
break;
|
|
i = (i >= sp->typecnt) ? 0 : -1;
|
|
/*
|
|
** Absent the above,
|
|
** if there are transition times
|
|
** and the first transition is to a daylight time
|
|
** find the standard type less than and closest to
|
|
** the type of the first transition.
|
|
*/
|
|
if (i < 0 && sp->timecnt > 0 && sp->ttis[sp->types[0]].tt_isdst) {
|
|
i = sp->types[0];
|
|
while (--i >= 0)
|
|
if (!sp->ttis[i].tt_isdst)
|
|
break;
|
|
}
|
|
/*
|
|
** If no result yet, find the first standard type.
|
|
** If there is none, punt to type zero.
|
|
*/
|
|
if (i < 0) {
|
|
i = 0;
|
|
while (sp->ttis[i].tt_isdst)
|
|
if (++i >= sp->typecnt) {
|
|
i = 0;
|
|
break;
|
|
}
|
|
}
|
|
sp->defaulttype = i;
|
|
#ifdef ALL_STATE
|
|
free(up);
|
|
#endif /* defined ALL_STATE */
|
|
return 0;
|
|
oops:
|
|
#ifdef ALL_STATE
|
|
free(up);
|
|
#endif /* defined ALL_STATE */
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
typesequiv(const struct state *const sp, const int a, const int b)
|
|
{
|
|
register int result;
|
|
|
|
if (sp == NULL ||
|
|
a < 0 || a >= sp->typecnt ||
|
|
b < 0 || b >= sp->typecnt)
|
|
result = FALSE;
|
|
else {
|
|
register const struct ttinfo * ap = &sp->ttis[a];
|
|
register const struct ttinfo * bp = &sp->ttis[b];
|
|
result = ap->tt_gmtoff == bp->tt_gmtoff &&
|
|
ap->tt_isdst == bp->tt_isdst &&
|
|
ap->tt_ttisstd == bp->tt_ttisstd &&
|
|
ap->tt_ttisgmt == bp->tt_ttisgmt &&
|
|
strcmp(&sp->chars[ap->tt_abbrind],
|
|
&sp->chars[bp->tt_abbrind]) == 0;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static const int mon_lengths[2][MONSPERYEAR] = {
|
|
{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
|
|
{ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
|
|
};
|
|
|
|
static const int year_lengths[2] = {
|
|
DAYSPERNYEAR, DAYSPERLYEAR
|
|
};
|
|
|
|
/*
|
|
** Given a pointer into a time zone string, scan until a character that is not
|
|
** a valid character in a zone name is found. Return a pointer to that
|
|
** character.
|
|
*/
|
|
|
|
static const char *
|
|
getzname(register const char * strp)
|
|
{
|
|
register char c;
|
|
|
|
while ((c = *strp) != '\0' && !is_digit(c) && c != ',' && c != '-' &&
|
|
c != '+')
|
|
++strp;
|
|
return strp;
|
|
}
|
|
|
|
/*
|
|
** Given a pointer into an extended time zone string, scan until the ending
|
|
** delimiter of the zone name is located. Return a pointer to the delimiter.
|
|
**
|
|
** As with getzname above, the legal character set is actually quite
|
|
** restricted, with other characters producing undefined results.
|
|
** We don't do any checking here; checking is done later in common-case code.
|
|
*/
|
|
|
|
static const char *
|
|
getqzname(register const char *strp, const int delim)
|
|
{
|
|
register int c;
|
|
|
|
while ((c = *strp) != '\0' && c != delim)
|
|
++strp;
|
|
return strp;
|
|
}
|
|
|
|
/*
|
|
** Given a pointer into a time zone string, extract a number from that string.
|
|
** Check that the number is within a specified range; if it is not, return
|
|
** NULL.
|
|
** Otherwise, return a pointer to the first character not part of the number.
|
|
*/
|
|
|
|
static const char *
|
|
getnum(register const char * strp, int * const nump, const int min, const int max)
|
|
{
|
|
register char c;
|
|
register int num;
|
|
|
|
if (strp == NULL || !is_digit(c = *strp))
|
|
return NULL;
|
|
num = 0;
|
|
do {
|
|
num = num * 10 + (c - '0');
|
|
if (num > max)
|
|
return NULL; /* illegal value */
|
|
c = *++strp;
|
|
} while (is_digit(c));
|
|
if (num < min)
|
|
return NULL; /* illegal value */
|
|
*nump = num;
|
|
return strp;
|
|
}
|
|
|
|
/*
|
|
** Given a pointer into a time zone string, extract a number of seconds,
|
|
** in hh[:mm[:ss]] form, from the string.
|
|
** If any error occurs, return NULL.
|
|
** Otherwise, return a pointer to the first character not part of the number
|
|
** of seconds.
|
|
*/
|
|
|
|
static const char *
|
|
getsecs(register const char *strp, int_fast32_t *const secsp)
|
|
{
|
|
int num;
|
|
|
|
/*
|
|
** 'HOURSPERDAY * DAYSPERWEEK - 1' allows quasi-Posix rules like
|
|
** "M10.4.6/26", which does not conform to Posix,
|
|
** but which specifies the equivalent of
|
|
** "02:00 on the first Sunday on or after 23 Oct".
|
|
*/
|
|
strp = getnum(strp, &num, 0, HOURSPERDAY * DAYSPERWEEK - 1);
|
|
if (strp == NULL)
|
|
return NULL;
|
|
*secsp = num * (int_fast32_t) SECSPERHOUR;
|
|
if (*strp == ':') {
|
|
++strp;
|
|
strp = getnum(strp, &num, 0, MINSPERHOUR - 1);
|
|
if (strp == NULL)
|
|
return NULL;
|
|
*secsp += num * SECSPERMIN;
|
|
if (*strp == ':') {
|
|
++strp;
|
|
/* 'SECSPERMIN' allows for leap seconds. */
|
|
strp = getnum(strp, &num, 0, SECSPERMIN);
|
|
if (strp == NULL)
|
|
return NULL;
|
|
*secsp += num;
|
|
}
|
|
}
|
|
return strp;
|
|
}
|
|
|
|
/*
|
|
** Given a pointer into a time zone string, extract an offset, in
|
|
** [+-]hh[:mm[:ss]] form, from the string.
|
|
** If any error occurs, return NULL.
|
|
** Otherwise, return a pointer to the first character not part of the time.
|
|
*/
|
|
|
|
static const char *
|
|
getoffset(register const char *strp, int_fast32_t *const offsetp)
|
|
{
|
|
register int neg = 0;
|
|
|
|
if (*strp == '-') {
|
|
neg = 1;
|
|
++strp;
|
|
} else if (*strp == '+')
|
|
++strp;
|
|
strp = getsecs(strp, offsetp);
|
|
if (strp == NULL)
|
|
return NULL; /* illegal time */
|
|
if (neg)
|
|
*offsetp = -*offsetp;
|
|
return strp;
|
|
}
|
|
|
|
/*
|
|
** Given a pointer into a time zone string, extract a rule in the form
|
|
** date[/time]. See POSIX section 8 for the format of "date" and "time".
|
|
** If a valid rule is not found, return NULL.
|
|
** Otherwise, return a pointer to the first character not part of the rule.
|
|
*/
|
|
|
|
static const char *
|
|
getrule(const char * strp, register struct rule * const rulep)
|
|
{
|
|
if (*strp == 'J') {
|
|
/*
|
|
** Julian day.
|
|
*/
|
|
rulep->r_type = JULIAN_DAY;
|
|
++strp;
|
|
strp = getnum(strp, &rulep->r_day, 1, DAYSPERNYEAR);
|
|
} else if (*strp == 'M') {
|
|
/*
|
|
** Month, week, day.
|
|
*/
|
|
rulep->r_type = MONTH_NTH_DAY_OF_WEEK;
|
|
++strp;
|
|
strp = getnum(strp, &rulep->r_mon, 1, MONSPERYEAR);
|
|
if (strp == NULL)
|
|
return NULL;
|
|
if (*strp++ != '.')
|
|
return NULL;
|
|
strp = getnum(strp, &rulep->r_week, 1, 5);
|
|
if (strp == NULL)
|
|
return NULL;
|
|
if (*strp++ != '.')
|
|
return NULL;
|
|
strp = getnum(strp, &rulep->r_day, 0, DAYSPERWEEK - 1);
|
|
} else if (is_digit(*strp)) {
|
|
/*
|
|
** Day of year.
|
|
*/
|
|
rulep->r_type = DAY_OF_YEAR;
|
|
strp = getnum(strp, &rulep->r_day, 0, DAYSPERLYEAR - 1);
|
|
} else return NULL; /* invalid format */
|
|
if (strp == NULL)
|
|
return NULL;
|
|
if (*strp == '/') {
|
|
/*
|
|
** Time specified.
|
|
*/
|
|
++strp;
|
|
strp = getoffset(strp, &rulep->r_time);
|
|
} else rulep->r_time = 2 * SECSPERHOUR; /* default = 2:00:00 */
|
|
return strp;
|
|
}
|
|
|
|
/*
|
|
** Given a year, a rule, and the offset from UT at the time that rule takes
|
|
** effect, calculate the year-relative time that rule takes effect.
|
|
*/
|
|
|
|
static int_fast32_t
|
|
transtime(const int year, register const struct rule *const rulep,
|
|
const int_fast32_t offset)
|
|
{
|
|
register int leapyear;
|
|
register int_fast32_t value;
|
|
register int i;
|
|
int d, m1, yy0, yy1, yy2, dow;
|
|
|
|
INITIALIZE(value);
|
|
leapyear = isleap(year);
|
|
switch (rulep->r_type) {
|
|
|
|
case JULIAN_DAY:
|
|
/*
|
|
** 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.
|
|
*/
|
|
value = (rulep->r_day - 1) * SECSPERDAY;
|
|
if (leapyear && rulep->r_day >= 60)
|
|
value += SECSPERDAY;
|
|
break;
|
|
|
|
case DAY_OF_YEAR:
|
|
/*
|
|
** n - day of year.
|
|
** Just add SECSPERDAY times the day number to the time of
|
|
** January 1, midnight, to get the day.
|
|
*/
|
|
value = rulep->r_day * SECSPERDAY;
|
|
break;
|
|
|
|
case MONTH_NTH_DAY_OF_WEEK:
|
|
/*
|
|
** Mm.n.d - nth "dth day" of month m.
|
|
*/
|
|
|
|
/*
|
|
** Use Zeller's Congruence to get day-of-week of first day of
|
|
** month.
|
|
*/
|
|
m1 = (rulep->r_mon + 9) % 12 + 1;
|
|
yy0 = (rulep->r_mon <= 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 += DAYSPERWEEK;
|
|
|
|
/*
|
|
** "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 = rulep->r_day - dow;
|
|
if (d < 0)
|
|
d += DAYSPERWEEK;
|
|
for (i = 1; i < rulep->r_week; ++i) {
|
|
if (d + DAYSPERWEEK >=
|
|
mon_lengths[leapyear][rulep->r_mon - 1])
|
|
break;
|
|
d += DAYSPERWEEK;
|
|
}
|
|
|
|
/*
|
|
** "d" is the day-of-month (zero-origin) of the day we want.
|
|
*/
|
|
value = d * SECSPERDAY;
|
|
for (i = 0; i < rulep->r_mon - 1; ++i)
|
|
value += mon_lengths[leapyear][i] * SECSPERDAY;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
** "value" is the year-relative time of 00:00:00 UT on the day in
|
|
** question. To get the year-relative time of the specified local
|
|
** time on that day, add the transition time and the current offset
|
|
** from UT.
|
|
*/
|
|
return value + rulep->r_time + offset;
|
|
}
|
|
|
|
/*
|
|
** Given a POSIX section 8-style TZ string, fill in the rule tables as
|
|
** appropriate.
|
|
*/
|
|
|
|
static int
|
|
tzparse(const char * name, register struct state * const sp,
|
|
const int lastditch)
|
|
{
|
|
const char * stdname;
|
|
const char * dstname;
|
|
size_t stdlen;
|
|
size_t dstlen;
|
|
int_fast32_t stdoffset;
|
|
int_fast32_t dstoffset;
|
|
register char * cp;
|
|
register int load_result;
|
|
static struct ttinfo zttinfo;
|
|
|
|
stdname = name;
|
|
if (lastditch) {
|
|
stdlen = strlen(name); /* length of standard zone name */
|
|
name += stdlen;
|
|
if (stdlen >= sizeof sp->chars)
|
|
stdlen = (sizeof sp->chars) - 1;
|
|
stdoffset = 0;
|
|
} else {
|
|
if (*name == '<') {
|
|
name++;
|
|
stdname = name;
|
|
name = getqzname(name, '>');
|
|
if (*name != '>')
|
|
return (-1);
|
|
stdlen = name - stdname;
|
|
name++;
|
|
} else {
|
|
name = getzname(name);
|
|
stdlen = name - stdname;
|
|
}
|
|
if (*name == '\0')
|
|
return -1;
|
|
name = getoffset(name, &stdoffset);
|
|
if (name == NULL)
|
|
return -1;
|
|
}
|
|
load_result = tzload(TZDEFRULES, sp, FALSE);
|
|
if (load_result != 0)
|
|
sp->leapcnt = 0; /* so, we're off a little */
|
|
if (*name != '\0') {
|
|
if (*name == '<') {
|
|
dstname = ++name;
|
|
name = getqzname(name, '>');
|
|
if (*name != '>')
|
|
return -1;
|
|
dstlen = name - dstname;
|
|
name++;
|
|
} else {
|
|
dstname = name;
|
|
name = getzname(name);
|
|
dstlen = name - dstname; /* length of DST zone name */
|
|
}
|
|
if (*name != '\0' && *name != ',' && *name != ';') {
|
|
name = getoffset(name, &dstoffset);
|
|
if (name == NULL)
|
|
return -1;
|
|
} else dstoffset = stdoffset - SECSPERHOUR;
|
|
if (*name == '\0' && load_result != 0)
|
|
name = TZDEFRULESTRING;
|
|
if (*name == ',' || *name == ';') {
|
|
struct rule start;
|
|
struct rule end;
|
|
register int year;
|
|
register int yearlim;
|
|
register int timecnt;
|
|
time_t janfirst;
|
|
|
|
++name;
|
|
if ((name = getrule(name, &start)) == NULL)
|
|
return -1;
|
|
if (*name++ != ',')
|
|
return -1;
|
|
if ((name = getrule(name, &end)) == NULL)
|
|
return -1;
|
|
if (*name != '\0')
|
|
return -1;
|
|
sp->typecnt = 2; /* standard time and DST */
|
|
/*
|
|
** Two transitions per year, from EPOCH_YEAR forward.
|
|
*/
|
|
sp->ttis[0] = sp->ttis[1] = zttinfo;
|
|
sp->ttis[0].tt_gmtoff = -dstoffset;
|
|
sp->ttis[0].tt_isdst = 1;
|
|
sp->ttis[0].tt_abbrind = stdlen + 1;
|
|
sp->ttis[1].tt_gmtoff = -stdoffset;
|
|
sp->ttis[1].tt_isdst = 0;
|
|
sp->ttis[1].tt_abbrind = 0;
|
|
sp->defaulttype = 0;
|
|
timecnt = 0;
|
|
janfirst = 0;
|
|
yearlim = EPOCH_YEAR + YEARSPERREPEAT;
|
|
for (year = EPOCH_YEAR; year < yearlim; year++) {
|
|
int_fast32_t
|
|
starttime = transtime(year, &start, stdoffset),
|
|
endtime = transtime(year, &end, dstoffset);
|
|
int_fast32_t
|
|
yearsecs = (year_lengths[isleap(year)]
|
|
* SECSPERDAY);
|
|
int reversed = endtime < starttime;
|
|
if (reversed) {
|
|
int_fast32_t swap = starttime;
|
|
starttime = endtime;
|
|
endtime = swap;
|
|
}
|
|
if (reversed
|
|
|| (starttime < endtime
|
|
&& (endtime - starttime
|
|
< (yearsecs
|
|
+ (stdoffset - dstoffset))))) {
|
|
if (TZ_MAX_TIMES - 2 < timecnt)
|
|
break;
|
|
yearlim = year + YEARSPERREPEAT + 1;
|
|
sp->ats[timecnt] = janfirst;
|
|
if (increment_overflow_time
|
|
(&sp->ats[timecnt], starttime))
|
|
break;
|
|
sp->types[timecnt++] = reversed;
|
|
sp->ats[timecnt] = janfirst;
|
|
if (increment_overflow_time
|
|
(&sp->ats[timecnt], endtime))
|
|
break;
|
|
sp->types[timecnt++] = !reversed;
|
|
}
|
|
if (increment_overflow_time(&janfirst, yearsecs))
|
|
break;
|
|
}
|
|
sp->timecnt = timecnt;
|
|
if (!timecnt)
|
|
sp->typecnt = 1; /* Perpetual DST. */
|
|
} else {
|
|
register int_fast32_t theirstdoffset;
|
|
register int_fast32_t theirdstoffset;
|
|
register int_fast32_t theiroffset;
|
|
register int isdst;
|
|
register int i;
|
|
register int j;
|
|
|
|
if (*name != '\0')
|
|
return -1;
|
|
/*
|
|
** Initial values of theirstdoffset and theirdstoffset.
|
|
*/
|
|
theirstdoffset = 0;
|
|
for (i = 0; i < sp->timecnt; ++i) {
|
|
j = sp->types[i];
|
|
if (!sp->ttis[j].tt_isdst) {
|
|
theirstdoffset =
|
|
-sp->ttis[j].tt_gmtoff;
|
|
break;
|
|
}
|
|
}
|
|
theirdstoffset = 0;
|
|
for (i = 0; i < sp->timecnt; ++i) {
|
|
j = sp->types[i];
|
|
if (sp->ttis[j].tt_isdst) {
|
|
theirdstoffset =
|
|
-sp->ttis[j].tt_gmtoff;
|
|
break;
|
|
}
|
|
}
|
|
/*
|
|
** Initially we're assumed to be in standard time.
|
|
*/
|
|
isdst = FALSE;
|
|
theiroffset = theirstdoffset;
|
|
/*
|
|
** Now juggle transition times and types
|
|
** tracking offsets as you do.
|
|
*/
|
|
for (i = 0; i < sp->timecnt; ++i) {
|
|
j = sp->types[i];
|
|
sp->types[i] = sp->ttis[j].tt_isdst;
|
|
if (sp->ttis[j].tt_ttisgmt) {
|
|
/* No adjustment to transition time */
|
|
} else {
|
|
/*
|
|
** If summer time is in effect, and the
|
|
** transition time was not specified as
|
|
** standard time, add the summer time
|
|
** offset to the transition time;
|
|
** otherwise, add the standard time
|
|
** offset to the transition time.
|
|
*/
|
|
/*
|
|
** Transitions from DST to DDST
|
|
** will effectively disappear since
|
|
** POSIX provides for only one DST
|
|
** offset.
|
|
*/
|
|
if (isdst && !sp->ttis[j].tt_ttisstd) {
|
|
sp->ats[i] += dstoffset -
|
|
theirdstoffset;
|
|
} else {
|
|
sp->ats[i] += stdoffset -
|
|
theirstdoffset;
|
|
}
|
|
}
|
|
theiroffset = -sp->ttis[j].tt_gmtoff;
|
|
if (sp->ttis[j].tt_isdst)
|
|
theirdstoffset = theiroffset;
|
|
else theirstdoffset = theiroffset;
|
|
}
|
|
/*
|
|
** Finally, fill in ttis.
|
|
*/
|
|
sp->ttis[0] = sp->ttis[1] = zttinfo;
|
|
sp->ttis[0].tt_gmtoff = -stdoffset;
|
|
sp->ttis[0].tt_isdst = FALSE;
|
|
sp->ttis[0].tt_abbrind = 0;
|
|
sp->ttis[1].tt_gmtoff = -dstoffset;
|
|
sp->ttis[1].tt_isdst = TRUE;
|
|
sp->ttis[1].tt_abbrind = stdlen + 1;
|
|
sp->typecnt = 2;
|
|
sp->defaulttype = 0;
|
|
}
|
|
} else {
|
|
dstlen = 0;
|
|
sp->typecnt = 1; /* only standard time */
|
|
sp->timecnt = 0;
|
|
sp->ttis[0] = zttinfo;
|
|
sp->ttis[0].tt_gmtoff = -stdoffset;
|
|
sp->ttis[0].tt_isdst = 0;
|
|
sp->ttis[0].tt_abbrind = 0;
|
|
sp->defaulttype = 0;
|
|
}
|
|
sp->charcnt = stdlen + 1;
|
|
if (dstlen != 0)
|
|
sp->charcnt += dstlen + 1;
|
|
if ((size_t) sp->charcnt > sizeof sp->chars)
|
|
return -1;
|
|
cp = sp->chars;
|
|
(void) strncpy(cp, stdname, stdlen);
|
|
cp += stdlen;
|
|
*cp++ = '\0';
|
|
if (dstlen != 0) {
|
|
(void) strncpy(cp, dstname, dstlen);
|
|
*(cp + dstlen) = '\0';
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
gmtload(struct state * const sp)
|
|
{
|
|
if (tzload(gmt, sp, TRUE) != 0)
|
|
(void) tzparse(gmt, sp, TRUE);
|
|
}
|
|
|
|
#ifndef STD_INSPIRED
|
|
/*
|
|
** A non-static declaration of tzsetwall in a system header file
|
|
** may cause a warning about this upcoming static declaration...
|
|
*/
|
|
static
|
|
#endif /* !defined STD_INSPIRED */
|
|
void
|
|
tzsetwall(void)
|
|
{
|
|
if (lcl_is_set < 0)
|
|
return;
|
|
lcl_is_set = -1;
|
|
|
|
#ifdef ALL_STATE
|
|
if (lclptr == NULL) {
|
|
lclptr = malloc(sizeof *lclptr);
|
|
if (lclptr == NULL) {
|
|
settzname(); /* all we can do */
|
|
return;
|
|
}
|
|
}
|
|
#endif /* defined ALL_STATE */
|
|
if (tzload(NULL, lclptr, TRUE) != 0)
|
|
gmtload(lclptr);
|
|
settzname();
|
|
}
|
|
|
|
#include <sys/system_properties.h> // For __system_property_get.
|
|
|
|
static void
|
|
tzset_locked(void)
|
|
{
|
|
register const char * name;
|
|
|
|
name = getenv("TZ");
|
|
|
|
// try the "persist.sys.timezone" system property first
|
|
static char buf[PROP_VALUE_MAX];
|
|
if (name == NULL && __system_property_get("persist.sys.timezone", buf) > 0) {
|
|
name = buf;
|
|
}
|
|
|
|
if (name == NULL) {
|
|
tzsetwall();
|
|
return;
|
|
}
|
|
|
|
if (lcl_is_set > 0 && strcmp(lcl_TZname, name) == 0)
|
|
return;
|
|
lcl_is_set = strlen(name) < sizeof lcl_TZname;
|
|
if (lcl_is_set)
|
|
(void) strcpy(lcl_TZname, name);
|
|
|
|
#ifdef ALL_STATE
|
|
if (lclptr == NULL) {
|
|
lclptr = malloc(sizeof *lclptr);
|
|
if (lclptr == NULL) {
|
|
settzname(); /* all we can do */
|
|
return;
|
|
}
|
|
}
|
|
#endif /* defined ALL_STATE */
|
|
if (*name == '\0') {
|
|
/*
|
|
** User wants it fast rather than right.
|
|
*/
|
|
lclptr->leapcnt = 0; /* so, we're off a little */
|
|
lclptr->timecnt = 0;
|
|
lclptr->typecnt = 0;
|
|
lclptr->ttis[0].tt_isdst = 0;
|
|
lclptr->ttis[0].tt_gmtoff = 0;
|
|
lclptr->ttis[0].tt_abbrind = 0;
|
|
(void) strcpy(lclptr->chars, gmt);
|
|
lclptr->defaulttype = 0;
|
|
} else if (tzload(name, lclptr, TRUE) != 0)
|
|
if (name[0] == ':' || tzparse(name, lclptr, FALSE) != 0)
|
|
(void) gmtload(lclptr);
|
|
settzname();
|
|
}
|
|
|
|
void
|
|
tzset(void)
|
|
{
|
|
_tzLock();
|
|
tzset_locked();
|
|
_tzUnlock();
|
|
}
|
|
|
|
/*
|
|
** The easy way to behave "as if no library function calls" localtime
|
|
** is to not call it--so we drop its guts into "localsub", which can be
|
|
** freely called. (And no, the PANS doesn't require the above behavior--
|
|
** but it *is* desirable.)
|
|
**
|
|
** The unused offset argument is for the benefit of mktime variants.
|
|
*/
|
|
|
|
/*ARGSUSED*/
|
|
static struct tm *
|
|
localsub(const time_t * const timep, const int_fast32_t offset,
|
|
struct tm * const tmp, struct state * sp) // android-changed: added sp.
|
|
{
|
|
register const struct ttinfo * ttisp;
|
|
register int i;
|
|
register struct tm * result;
|
|
const time_t t = *timep;
|
|
|
|
// BEGIN android-changed: support user-supplied sp.
|
|
if (sp == NULL) {
|
|
sp = lclptr;
|
|
}
|
|
// END android-changed
|
|
if (sp == NULL)
|
|
return gmtsub(timep, offset, tmp, sp); // android-changed: added sp.
|
|
if ((sp->goback && t < sp->ats[0]) ||
|
|
(sp->goahead && t > sp->ats[sp->timecnt - 1])) {
|
|
time_t newt = t;
|
|
register time_t seconds;
|
|
register time_t years;
|
|
|
|
if (t < sp->ats[0])
|
|
seconds = sp->ats[0] - t;
|
|
else seconds = t - sp->ats[sp->timecnt - 1];
|
|
--seconds;
|
|
years = (seconds / SECSPERREPEAT + 1) * YEARSPERREPEAT;
|
|
seconds = years * AVGSECSPERYEAR;
|
|
if (t < sp->ats[0])
|
|
newt += seconds;
|
|
else newt -= seconds;
|
|
if (newt < sp->ats[0] ||
|
|
newt > sp->ats[sp->timecnt - 1])
|
|
return NULL; /* "cannot happen" */
|
|
result = localsub(&newt, offset, tmp, sp); // android-changed: added sp.
|
|
if (result == tmp) {
|
|
register time_t newy;
|
|
|
|
newy = tmp->tm_year;
|
|
if (t < sp->ats[0])
|
|
newy -= years;
|
|
else newy += years;
|
|
tmp->tm_year = newy;
|
|
if (tmp->tm_year != newy)
|
|
return NULL;
|
|
}
|
|
return result;
|
|
}
|
|
if (sp->timecnt == 0 || t < sp->ats[0]) {
|
|
i = sp->defaulttype;
|
|
} else {
|
|
register int lo = 1;
|
|
register int hi = sp->timecnt;
|
|
|
|
while (lo < hi) {
|
|
register int mid = (lo + hi) >> 1;
|
|
|
|
if (t < sp->ats[mid])
|
|
hi = mid;
|
|
else lo = mid + 1;
|
|
}
|
|
i = (int) sp->types[lo - 1];
|
|
}
|
|
ttisp = &sp->ttis[i];
|
|
/*
|
|
** To get (wrong) behavior that's compatible with System V Release 2.0
|
|
** you'd replace the statement below with
|
|
** t += ttisp->tt_gmtoff;
|
|
** timesub(&t, 0L, sp, tmp);
|
|
*/
|
|
result = timesub(&t, ttisp->tt_gmtoff, sp, tmp);
|
|
tmp->tm_isdst = ttisp->tt_isdst;
|
|
tzname[tmp->tm_isdst] = &sp->chars[ttisp->tt_abbrind];
|
|
#ifdef TM_ZONE
|
|
tmp->TM_ZONE = &sp->chars[ttisp->tt_abbrind];
|
|
#endif /* defined TM_ZONE */
|
|
return result;
|
|
}
|
|
|
|
struct tm *
|
|
localtime(const time_t * const timep)
|
|
{
|
|
return localtime_r(timep, &tmGlobal);
|
|
}
|
|
|
|
/*
|
|
** Re-entrant version of localtime.
|
|
*/
|
|
|
|
struct tm *
|
|
localtime_r(const time_t * const timep, struct tm * tmp)
|
|
{
|
|
struct tm* result;
|
|
|
|
_tzLock();
|
|
tzset_locked();
|
|
result = localsub(timep, 0L, tmp, NULL); // android-changed: extra parameter.
|
|
_tzUnlock();
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
** gmtsub is to gmtime as localsub is to localtime.
|
|
*/
|
|
|
|
static struct tm *
|
|
gmtsub(const time_t * const timep, const int_fast32_t offset,
|
|
struct tm *const tmp, struct state * sp __unused) // android-changed: added sp.
|
|
{
|
|
register struct tm * result;
|
|
|
|
if (!gmt_is_set) {
|
|
#ifdef ALL_STATE
|
|
gmtptr = malloc(sizeof *gmtptr);
|
|
gmt_is_set = gmtptr != NULL;
|
|
#else
|
|
gmt_is_set = TRUE;
|
|
#endif /* defined ALL_STATE */
|
|
if (gmt_is_set)
|
|
gmtload(gmtptr);
|
|
}
|
|
result = timesub(timep, offset, gmtptr, tmp);
|
|
#ifdef TM_ZONE
|
|
/*
|
|
** Could get fancy here and deliver something such as
|
|
** "UT+xxxx" or "UT-xxxx" if offset is non-zero,
|
|
** but this is no time for a treasure hunt.
|
|
*/
|
|
tmp->TM_ZONE = offset ? wildabbr : gmtptr ? gmtptr->chars : gmt;
|
|
#endif /* defined TM_ZONE */
|
|
return result;
|
|
}
|
|
|
|
struct tm *
|
|
gmtime(const time_t * const timep)
|
|
{
|
|
return gmtime_r(timep, &tmGlobal);
|
|
}
|
|
|
|
/*
|
|
* Re-entrant version of gmtime.
|
|
*/
|
|
|
|
struct tm *
|
|
gmtime_r(const time_t * const timep, struct tm * tmp)
|
|
{
|
|
struct tm* result;
|
|
|
|
_tzLock();
|
|
result = gmtsub(timep, 0L, tmp, NULL); // android-changed: extra parameter.
|
|
_tzUnlock();
|
|
|
|
return result;
|
|
}
|
|
|
|
#ifdef STD_INSPIRED
|
|
|
|
struct tm *
|
|
offtime(const time_t *const timep, const long offset)
|
|
{
|
|
return gmtsub(timep, offset, &tmGlobal, NULL); // android-changed: extra parameter.
|
|
}
|
|
|
|
#endif /* defined STD_INSPIRED */
|
|
|
|
/*
|
|
** Return the number of leap years through the end of the given year
|
|
** where, to make the math easy, the answer for year zero is defined as zero.
|
|
*/
|
|
|
|
static int
|
|
leaps_thru_end_of(register const int y)
|
|
{
|
|
return (y >= 0) ? (y / 4 - y / 100 + y / 400) :
|
|
-(leaps_thru_end_of(-(y + 1)) + 1);
|
|
}
|
|
|
|
static struct tm *
|
|
timesub(const time_t *const timep, const int_fast32_t offset,
|
|
register const struct state *const sp,
|
|
register struct tm *const tmp)
|
|
{
|
|
register const struct lsinfo * lp;
|
|
register time_t tdays;
|
|
register int idays; /* unsigned would be so 2003 */
|
|
register int_fast64_t rem;
|
|
int y;
|
|
register const int * ip;
|
|
register int_fast64_t corr;
|
|
register int hit;
|
|
register int i;
|
|
|
|
corr = 0;
|
|
hit = 0;
|
|
i = (sp == NULL) ? 0 : sp->leapcnt;
|
|
while (--i >= 0) {
|
|
lp = &sp->lsis[i];
|
|
if (*timep >= lp->ls_trans) {
|
|
if (*timep == lp->ls_trans) {
|
|
hit = ((i == 0 && lp->ls_corr > 0) ||
|
|
lp->ls_corr > sp->lsis[i - 1].ls_corr);
|
|
if (hit)
|
|
while (i > 0 &&
|
|
sp->lsis[i].ls_trans ==
|
|
sp->lsis[i - 1].ls_trans + 1 &&
|
|
sp->lsis[i].ls_corr ==
|
|
sp->lsis[i - 1].ls_corr + 1) {
|
|
++hit;
|
|
--i;
|
|
}
|
|
}
|
|
corr = lp->ls_corr;
|
|
break;
|
|
}
|
|
}
|
|
y = EPOCH_YEAR;
|
|
tdays = *timep / SECSPERDAY;
|
|
rem = *timep - tdays * SECSPERDAY;
|
|
while (tdays < 0 || tdays >= year_lengths[isleap(y)]) {
|
|
int newy;
|
|
register time_t tdelta;
|
|
register int idelta;
|
|
register int leapdays;
|
|
|
|
tdelta = tdays / DAYSPERLYEAR;
|
|
if (! ((! TYPE_SIGNED(time_t) || INT_MIN <= tdelta)
|
|
&& tdelta <= INT_MAX))
|
|
return NULL;
|
|
idelta = tdelta;
|
|
if (idelta == 0)
|
|
idelta = (tdays < 0) ? -1 : 1;
|
|
newy = y;
|
|
if (increment_overflow(&newy, idelta))
|
|
return NULL;
|
|
leapdays = leaps_thru_end_of(newy - 1) -
|
|
leaps_thru_end_of(y - 1);
|
|
tdays -= ((time_t) newy - y) * DAYSPERNYEAR;
|
|
tdays -= leapdays;
|
|
y = newy;
|
|
}
|
|
{
|
|
register int_fast32_t seconds;
|
|
|
|
seconds = tdays * SECSPERDAY;
|
|
tdays = seconds / SECSPERDAY;
|
|
rem += seconds - tdays * SECSPERDAY;
|
|
}
|
|
/*
|
|
** Given the range, we can now fearlessly cast...
|
|
*/
|
|
idays = tdays;
|
|
rem += offset - corr;
|
|
while (rem < 0) {
|
|
rem += SECSPERDAY;
|
|
--idays;
|
|
}
|
|
while (rem >= SECSPERDAY) {
|
|
rem -= SECSPERDAY;
|
|
++idays;
|
|
}
|
|
while (idays < 0) {
|
|
if (increment_overflow(&y, -1))
|
|
return NULL;
|
|
idays += year_lengths[isleap(y)];
|
|
}
|
|
while (idays >= year_lengths[isleap(y)]) {
|
|
idays -= year_lengths[isleap(y)];
|
|
if (increment_overflow(&y, 1))
|
|
return NULL;
|
|
}
|
|
tmp->tm_year = y;
|
|
if (increment_overflow(&tmp->tm_year, -TM_YEAR_BASE))
|
|
return NULL;
|
|
tmp->tm_yday = idays;
|
|
/*
|
|
** The "extra" mods below avoid overflow problems.
|
|
*/
|
|
tmp->tm_wday = EPOCH_WDAY +
|
|
((y - EPOCH_YEAR) % DAYSPERWEEK) *
|
|
(DAYSPERNYEAR % DAYSPERWEEK) +
|
|
leaps_thru_end_of(y - 1) -
|
|
leaps_thru_end_of(EPOCH_YEAR - 1) +
|
|
idays;
|
|
tmp->tm_wday %= DAYSPERWEEK;
|
|
if (tmp->tm_wday < 0)
|
|
tmp->tm_wday += DAYSPERWEEK;
|
|
tmp->tm_hour = (int) (rem / SECSPERHOUR);
|
|
rem %= SECSPERHOUR;
|
|
tmp->tm_min = (int) (rem / SECSPERMIN);
|
|
/*
|
|
** A positive leap second requires a special
|
|
** representation. This uses "... ??:59:60" et seq.
|
|
*/
|
|
tmp->tm_sec = (int) (rem % SECSPERMIN) + hit;
|
|
ip = mon_lengths[isleap(y)];
|
|
for (tmp->tm_mon = 0; idays >= ip[tmp->tm_mon]; ++(tmp->tm_mon))
|
|
idays -= ip[tmp->tm_mon];
|
|
tmp->tm_mday = (int) (idays + 1);
|
|
tmp->tm_isdst = 0;
|
|
#ifdef TM_GMTOFF
|
|
tmp->TM_GMTOFF = offset;
|
|
#endif /* defined TM_GMTOFF */
|
|
return tmp;
|
|
}
|
|
|
|
char *
|
|
ctime(const time_t * const timep)
|
|
{
|
|
/*
|
|
** Section 4.12.3.2 of X3.159-1989 requires that
|
|
** The ctime function converts the calendar time pointed to by timer
|
|
** to local time in the form of a string. It is equivalent to
|
|
** asctime(localtime(timer))
|
|
*/
|
|
return asctime(localtime(timep));
|
|
}
|
|
|
|
char *
|
|
ctime_r(const time_t * const timep, char * buf)
|
|
{
|
|
struct tm mytm;
|
|
|
|
return asctime_r(localtime_r(timep, &mytm), buf);
|
|
}
|
|
|
|
/*
|
|
** Adapted from code provided by Robert Elz, who writes:
|
|
** The "best" way to do mktime I think is based on an idea of Bob
|
|
** Kridle's (so its said...) from a long time ago.
|
|
** It does a binary search of the time_t space. Since time_t's are
|
|
** just 32 bits, its a max of 32 iterations (even at 64 bits it
|
|
** would still be very reasonable).
|
|
*/
|
|
|
|
#ifndef WRONG
|
|
#define WRONG (-1)
|
|
#endif /* !defined WRONG */
|
|
|
|
/*
|
|
** Normalize logic courtesy Paul Eggert.
|
|
*/
|
|
|
|
static int
|
|
increment_overflow(int *const ip, int j)
|
|
{
|
|
register int const i = *ip;
|
|
|
|
/*
|
|
** If i >= 0 there can only be overflow if i + j > INT_MAX
|
|
** or if j > INT_MAX - i; given i >= 0, INT_MAX - i cannot overflow.
|
|
** If i < 0 there can only be overflow if i + j < INT_MIN
|
|
** or if j < INT_MIN - i; given i < 0, INT_MIN - i cannot overflow.
|
|
*/
|
|
if ((i >= 0) ? (j > INT_MAX - i) : (j < INT_MIN - i))
|
|
return TRUE;
|
|
*ip += j;
|
|
return FALSE;
|
|
}
|
|
|
|
static int
|
|
increment_overflow32(int_fast32_t *const lp, int const m)
|
|
{
|
|
register int_fast32_t const l = *lp;
|
|
|
|
if ((l >= 0) ? (m > INT_FAST32_MAX - l) : (m < INT_FAST32_MIN - l))
|
|
return TRUE;
|
|
*lp += m;
|
|
return FALSE;
|
|
}
|
|
|
|
static int
|
|
increment_overflow_time(time_t *tp, int_fast32_t j)
|
|
{
|
|
/*
|
|
** This is like
|
|
** 'if (! (time_t_min <= *tp + j && *tp + j <= time_t_max)) ...',
|
|
** except that it does the right thing even if *tp + j would overflow.
|
|
*/
|
|
if (! (j < 0
|
|
? (TYPE_SIGNED(time_t) ? time_t_min - j <= *tp : -1 - j < *tp)
|
|
: *tp <= time_t_max - j))
|
|
return TRUE;
|
|
*tp += j;
|
|
return FALSE;
|
|
}
|
|
|
|
static int
|
|
normalize_overflow(int *const tensptr, int *const unitsptr, const int base)
|
|
{
|
|
register int tensdelta;
|
|
|
|
tensdelta = (*unitsptr >= 0) ?
|
|
(*unitsptr / base) :
|
|
(-1 - (-1 - *unitsptr) / base);
|
|
*unitsptr -= tensdelta * base;
|
|
return increment_overflow(tensptr, tensdelta);
|
|
}
|
|
|
|
static int
|
|
normalize_overflow32(int_fast32_t *const tensptr, int *const unitsptr,
|
|
const int base)
|
|
{
|
|
register int tensdelta;
|
|
|
|
tensdelta = (*unitsptr >= 0) ?
|
|
(*unitsptr / base) :
|
|
(-1 - (-1 - *unitsptr) / base);
|
|
*unitsptr -= tensdelta * base;
|
|
return increment_overflow32(tensptr, tensdelta);
|
|
}
|
|
|
|
static int
|
|
tmcomp(register const struct tm * const atmp,
|
|
register const struct tm * const btmp)
|
|
{
|
|
register int result;
|
|
|
|
if (atmp->tm_year != btmp->tm_year)
|
|
return atmp->tm_year < btmp->tm_year ? -1 : 1;
|
|
if ((result = (atmp->tm_mon - btmp->tm_mon)) == 0 &&
|
|
(result = (atmp->tm_mday - btmp->tm_mday)) == 0 &&
|
|
(result = (atmp->tm_hour - btmp->tm_hour)) == 0 &&
|
|
(result = (atmp->tm_min - btmp->tm_min)) == 0)
|
|
result = atmp->tm_sec - btmp->tm_sec;
|
|
return result;
|
|
}
|
|
|
|
static time_t
|
|
time2sub(struct tm * const tmp,
|
|
struct tm *(*const funcp)(const time_t*, int_fast32_t, struct tm*, struct state*),
|
|
const int_fast32_t offset,
|
|
int * const okayp,
|
|
const int do_norm_secs, struct state * sp) // android-changed: added sp
|
|
{
|
|
register int dir;
|
|
register int i, j;
|
|
register int saved_seconds;
|
|
register int_fast32_t li;
|
|
register time_t lo;
|
|
register time_t hi;
|
|
int_fast32_t y;
|
|
time_t newt;
|
|
time_t t;
|
|
struct tm yourtm, mytm;
|
|
|
|
*okayp = FALSE;
|
|
yourtm = *tmp;
|
|
if (do_norm_secs) {
|
|
if (normalize_overflow(&yourtm.tm_min, &yourtm.tm_sec,
|
|
SECSPERMIN))
|
|
return WRONG;
|
|
}
|
|
if (normalize_overflow(&yourtm.tm_hour, &yourtm.tm_min, MINSPERHOUR))
|
|
return WRONG;
|
|
if (normalize_overflow(&yourtm.tm_mday, &yourtm.tm_hour, HOURSPERDAY))
|
|
return WRONG;
|
|
y = yourtm.tm_year;
|
|
if (normalize_overflow32(&y, &yourtm.tm_mon, MONSPERYEAR))
|
|
return WRONG;
|
|
/*
|
|
** Turn y into an actual year number for now.
|
|
** It is converted back to an offset from TM_YEAR_BASE later.
|
|
*/
|
|
if (increment_overflow32(&y, TM_YEAR_BASE))
|
|
return WRONG;
|
|
while (yourtm.tm_mday <= 0) {
|
|
if (increment_overflow32(&y, -1))
|
|
return WRONG;
|
|
li = y + (1 < yourtm.tm_mon);
|
|
yourtm.tm_mday += year_lengths[isleap(li)];
|
|
}
|
|
while (yourtm.tm_mday > DAYSPERLYEAR) {
|
|
li = y + (1 < yourtm.tm_mon);
|
|
yourtm.tm_mday -= year_lengths[isleap(li)];
|
|
if (increment_overflow32(&y, 1))
|
|
return WRONG;
|
|
}
|
|
for ( ; ; ) {
|
|
i = mon_lengths[isleap(y)][yourtm.tm_mon];
|
|
if (yourtm.tm_mday <= i)
|
|
break;
|
|
yourtm.tm_mday -= i;
|
|
if (++yourtm.tm_mon >= MONSPERYEAR) {
|
|
yourtm.tm_mon = 0;
|
|
if (increment_overflow32(&y, 1))
|
|
return WRONG;
|
|
}
|
|
}
|
|
if (increment_overflow32(&y, -TM_YEAR_BASE))
|
|
return WRONG;
|
|
yourtm.tm_year = y;
|
|
if (yourtm.tm_year != y)
|
|
return WRONG;
|
|
if (yourtm.tm_sec >= 0 && yourtm.tm_sec < SECSPERMIN)
|
|
saved_seconds = 0;
|
|
else if (y + TM_YEAR_BASE < EPOCH_YEAR) {
|
|
/*
|
|
** We can't set tm_sec to 0, because that might push the
|
|
** time below the minimum representable time.
|
|
** Set tm_sec to 59 instead.
|
|
** This assumes that the minimum representable time is
|
|
** not in the same minute that a leap second was deleted from,
|
|
** which is a safer assumption than using 58 would be.
|
|
*/
|
|
if (increment_overflow(&yourtm.tm_sec, 1 - SECSPERMIN))
|
|
return WRONG;
|
|
saved_seconds = yourtm.tm_sec;
|
|
yourtm.tm_sec = SECSPERMIN - 1;
|
|
} else {
|
|
saved_seconds = yourtm.tm_sec;
|
|
yourtm.tm_sec = 0;
|
|
}
|
|
/*
|
|
** Do a binary search (this works whatever time_t's type is).
|
|
*/
|
|
if (!TYPE_SIGNED(time_t)) {
|
|
lo = 0;
|
|
hi = lo - 1;
|
|
} else {
|
|
lo = 1;
|
|
for (i = 0; i < (int) TYPE_BIT(time_t) - 1; ++i)
|
|
lo *= 2;
|
|
hi = -(lo + 1);
|
|
}
|
|
for ( ; ; ) {
|
|
t = lo / 2 + hi / 2;
|
|
if (t < lo)
|
|
t = lo;
|
|
else if (t > hi)
|
|
t = hi;
|
|
if ((*funcp)(&t, offset, &mytm, sp) == NULL) { // android-changed: added sp.
|
|
/*
|
|
** Assume that t is too extreme to be represented in
|
|
** a struct tm; arrange things so that it is less
|
|
** extreme on the next pass.
|
|
*/
|
|
dir = (t > 0) ? 1 : -1;
|
|
} else dir = tmcomp(&mytm, &yourtm);
|
|
if (dir != 0) {
|
|
if (t == lo) {
|
|
if (t == time_t_max)
|
|
return WRONG;
|
|
++t;
|
|
++lo;
|
|
} else if (t == hi) {
|
|
if (t == time_t_min)
|
|
return WRONG;
|
|
--t;
|
|
--hi;
|
|
}
|
|
if (lo > hi)
|
|
return WRONG;
|
|
if (dir > 0)
|
|
hi = t;
|
|
else lo = t;
|
|
continue;
|
|
}
|
|
if (yourtm.tm_isdst < 0 || mytm.tm_isdst == yourtm.tm_isdst)
|
|
break;
|
|
/*
|
|
** Right time, wrong type.
|
|
** Hunt for right time, right type.
|
|
** It's okay to guess wrong since the guess
|
|
** gets checked.
|
|
*/
|
|
// BEGIN android-changed: support user-supplied sp
|
|
if (sp == NULL) {
|
|
sp = (struct state *)
|
|
((funcp == localsub) ? lclptr : gmtptr);
|
|
}
|
|
// END android-changed
|
|
if (sp == NULL)
|
|
return WRONG;
|
|
for (i = sp->typecnt - 1; i >= 0; --i) {
|
|
if (sp->ttis[i].tt_isdst != yourtm.tm_isdst)
|
|
continue;
|
|
for (j = sp->typecnt - 1; j >= 0; --j) {
|
|
if (sp->ttis[j].tt_isdst == yourtm.tm_isdst)
|
|
continue;
|
|
newt = t + sp->ttis[j].tt_gmtoff -
|
|
sp->ttis[i].tt_gmtoff;
|
|
if ((*funcp)(&newt, offset, &mytm, sp) == NULL) // android-changed: added sp.
|
|
continue;
|
|
if (tmcomp(&mytm, &yourtm) != 0)
|
|
continue;
|
|
if (mytm.tm_isdst != yourtm.tm_isdst)
|
|
continue;
|
|
/*
|
|
** We have a match.
|
|
*/
|
|
t = newt;
|
|
goto label;
|
|
}
|
|
}
|
|
return WRONG;
|
|
}
|
|
label:
|
|
newt = t + saved_seconds;
|
|
if ((newt < t) != (saved_seconds < 0))
|
|
return WRONG;
|
|
t = newt;
|
|
if ((*funcp)(&t, offset, tmp, sp)) // android-changed: added sp.
|
|
*okayp = TRUE;
|
|
return t;
|
|
}
|
|
|
|
static time_t
|
|
time2(struct tm * const tmp,
|
|
struct tm * (*const funcp)(const time_t *, int_fast32_t, struct tm *, struct state *), // android-changed: added sp.
|
|
const int_fast32_t offset,
|
|
int *const okayp, struct state* sp) // android-changed: added sp.
|
|
{
|
|
time_t t;
|
|
|
|
/*
|
|
** First try without normalization of seconds
|
|
** (in case tm_sec contains a value associated with a leap second).
|
|
** If that fails, try with normalization of seconds.
|
|
*/
|
|
t = time2sub(tmp, funcp, offset, okayp, FALSE, sp);
|
|
return *okayp ? t : time2sub(tmp, funcp, offset, okayp, TRUE, sp);
|
|
}
|
|
|
|
static time_t
|
|
time1(struct tm * const tmp,
|
|
struct tm * (* const funcp) (const time_t *, int_fast32_t, struct tm *, struct state *), // android-changed: added sp.
|
|
const int_fast32_t offset, struct state * sp) // android-changed: added sp.
|
|
{
|
|
register time_t t;
|
|
register int samei, otheri;
|
|
register int sameind, otherind;
|
|
register int i;
|
|
register int nseen;
|
|
char seen[TZ_MAX_TYPES];
|
|
unsigned char types[TZ_MAX_TYPES];
|
|
int okay;
|
|
|
|
if (tmp == NULL) {
|
|
errno = EINVAL;
|
|
return WRONG;
|
|
}
|
|
if (tmp->tm_isdst > 1)
|
|
tmp->tm_isdst = 1;
|
|
t = time2(tmp, funcp, offset, &okay, sp); // android-changed: added sp.
|
|
if (okay)
|
|
return t;
|
|
if (tmp->tm_isdst < 0)
|
|
#ifdef PCTS
|
|
/*
|
|
** POSIX Conformance Test Suite code courtesy Grant Sullivan.
|
|
*/
|
|
tmp->tm_isdst = 0; /* reset to std and try again */
|
|
#else
|
|
return t;
|
|
#endif /* !defined PCTS */
|
|
/*
|
|
** We're supposed to assume that somebody took a time of one type
|
|
** and did some math on it that yielded a "struct tm" that's bad.
|
|
** We try to divine the type they started from and adjust to the
|
|
** type they need.
|
|
*/
|
|
// BEGIN android-changed: support user-supplied sp.
|
|
if (sp == NULL) {
|
|
sp = (struct state *) ((funcp == localsub) ? lclptr : gmtptr);
|
|
}
|
|
// BEGIN android-changed
|
|
if (sp == NULL)
|
|
return WRONG;
|
|
for (i = 0; i < sp->typecnt; ++i)
|
|
seen[i] = FALSE;
|
|
nseen = 0;
|
|
for (i = sp->timecnt - 1; i >= 0; --i)
|
|
if (!seen[sp->types[i]]) {
|
|
seen[sp->types[i]] = TRUE;
|
|
types[nseen++] = sp->types[i];
|
|
}
|
|
for (sameind = 0; sameind < nseen; ++sameind) {
|
|
samei = types[sameind];
|
|
if (sp->ttis[samei].tt_isdst != tmp->tm_isdst)
|
|
continue;
|
|
for (otherind = 0; otherind < nseen; ++otherind) {
|
|
otheri = types[otherind];
|
|
if (sp->ttis[otheri].tt_isdst == tmp->tm_isdst)
|
|
continue;
|
|
tmp->tm_sec += sp->ttis[otheri].tt_gmtoff -
|
|
sp->ttis[samei].tt_gmtoff;
|
|
tmp->tm_isdst = !tmp->tm_isdst;
|
|
t = time2(tmp, funcp, offset, &okay, sp); // android-changed: added sp.
|
|
if (okay)
|
|
return t;
|
|
tmp->tm_sec -= sp->ttis[otheri].tt_gmtoff -
|
|
sp->ttis[samei].tt_gmtoff;
|
|
tmp->tm_isdst = !tmp->tm_isdst;
|
|
}
|
|
}
|
|
return WRONG;
|
|
}
|
|
|
|
time_t
|
|
mktime(struct tm * const tmp)
|
|
{
|
|
_tzLock();
|
|
tzset_locked();
|
|
time_t result = time1(tmp, localsub, 0L, NULL); // android-changed: extra parameter.
|
|
_tzUnlock();
|
|
return result;
|
|
}
|
|
|
|
#ifdef STD_INSPIRED
|
|
|
|
time_t
|
|
timelocal(struct tm * const tmp)
|
|
{
|
|
if (tmp != NULL)
|
|
tmp->tm_isdst = -1; /* in case it wasn't initialized */
|
|
return mktime(tmp);
|
|
}
|
|
|
|
time_t
|
|
timegm(struct tm * const tmp)
|
|
{
|
|
time_t result;
|
|
|
|
if (tmp != NULL)
|
|
tmp->tm_isdst = 0;
|
|
_tzLock();
|
|
result = time1(tmp, gmtsub, 0L, NULL); // android-changed: extra parameter.
|
|
_tzUnlock();
|
|
|
|
return result;
|
|
}
|
|
|
|
time_t
|
|
timeoff(struct tm *const tmp, const long offset)
|
|
{
|
|
if (tmp != NULL)
|
|
tmp->tm_isdst = 0;
|
|
return time1(tmp, gmtsub, offset, NULL); // android-changed: extra parameter.
|
|
}
|
|
|
|
#endif /* defined STD_INSPIRED */
|
|
|
|
#ifdef CMUCS
|
|
|
|
/*
|
|
** The following is supplied for compatibility with
|
|
** previous versions of the CMUCS runtime library.
|
|
*/
|
|
|
|
long
|
|
gtime(struct tm * const tmp)
|
|
{
|
|
const time_t t = mktime(tmp);
|
|
|
|
if (t == WRONG)
|
|
return -1;
|
|
return t;
|
|
}
|
|
|
|
#endif /* defined CMUCS */
|
|
|
|
/*
|
|
** XXX--is the below the right way to conditionalize??
|
|
*/
|
|
|
|
#ifdef STD_INSPIRED
|
|
|
|
/*
|
|
** IEEE Std 1003.1-1988 (POSIX) legislates that 536457599
|
|
** shall correspond to "Wed Dec 31 23:59:59 UTC 1986", which
|
|
** is not the case if we are accounting for leap seconds.
|
|
** So, we provide the following conversion routines for use
|
|
** when exchanging timestamps with POSIX conforming systems.
|
|
*/
|
|
|
|
static int_fast64_t
|
|
leapcorr(time_t * timep)
|
|
{
|
|
register struct state * sp;
|
|
register struct lsinfo * lp;
|
|
register int i;
|
|
|
|
sp = lclptr;
|
|
i = sp->leapcnt;
|
|
while (--i >= 0) {
|
|
lp = &sp->lsis[i];
|
|
if (*timep >= lp->ls_trans)
|
|
return lp->ls_corr;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
time_t
|
|
time2posix(time_t t)
|
|
{
|
|
tzset();
|
|
return t - leapcorr(&t);
|
|
}
|
|
|
|
time_t
|
|
posix2time(time_t t)
|
|
{
|
|
time_t x;
|
|
time_t y;
|
|
|
|
tzset();
|
|
/*
|
|
** For a positive leap second hit, the result
|
|
** is not unique. For a negative leap second
|
|
** hit, the corresponding time doesn't exist,
|
|
** so we return an adjacent second.
|
|
*/
|
|
x = t + leapcorr(&t);
|
|
y = x - leapcorr(&x);
|
|
if (y < t) {
|
|
do {
|
|
x++;
|
|
y = x - leapcorr(&x);
|
|
} while (y < t);
|
|
if (t != y)
|
|
return x - 1;
|
|
} else if (y > t) {
|
|
do {
|
|
--x;
|
|
y = x - leapcorr(&x);
|
|
} while (y > t);
|
|
if (t != y)
|
|
return x + 1;
|
|
}
|
|
return x;
|
|
}
|
|
|
|
#endif /* defined STD_INSPIRED */
|
|
|
|
// BEGIN android-added
|
|
|
|
#include <assert.h>
|
|
#include <stdint.h>
|
|
#include <arpa/inet.h> // For ntohl(3).
|
|
|
|
static int __bionic_open_tzdata_path(const char* path_prefix_variable, const char* path_suffix,
|
|
const char* olson_id, int* data_size) {
|
|
const char* path_prefix = getenv(path_prefix_variable);
|
|
if (path_prefix == NULL) {
|
|
fprintf(stderr, "%s: %s not set!\n", __FUNCTION__, path_prefix_variable);
|
|
return -1;
|
|
}
|
|
size_t path_length = strlen(path_prefix) + 1 + strlen(path_suffix) + 1;
|
|
char* path = malloc(path_length);
|
|
if (path == NULL) {
|
|
fprintf(stderr, "%s: couldn't allocate %zu-byte path\n", __FUNCTION__, path_length);
|
|
return -1;
|
|
}
|
|
snprintf(path, path_length, "%s/%s", path_prefix, path_suffix);
|
|
int fd = TEMP_FAILURE_RETRY(open(path, OPEN_MODE));
|
|
if (fd == -1) {
|
|
XLOG(("%s: could not open \"%s\": %s\n", __FUNCTION__, path, strerror(errno)));
|
|
free(path);
|
|
return -2; // Distinguish failure to find any data from failure to find a specific id.
|
|
}
|
|
|
|
// byte[12] tzdata_version -- "tzdata2012f\0"
|
|
// int index_offset
|
|
// int data_offset
|
|
// int zonetab_offset
|
|
struct bionic_tzdata_header {
|
|
char tzdata_version[12];
|
|
int32_t index_offset;
|
|
int32_t data_offset;
|
|
int32_t zonetab_offset;
|
|
} header;
|
|
memset(&header, 0, sizeof(header));
|
|
ssize_t bytes_read = TEMP_FAILURE_RETRY(read(fd, &header, sizeof(header)));
|
|
if (bytes_read != sizeof(header)) {
|
|
fprintf(stderr, "%s: could not read header of \"%s\": %s\n",
|
|
__FUNCTION__, path, (bytes_read == -1) ? strerror(errno) : "short read");
|
|
free(path);
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
if (strncmp(header.tzdata_version, "tzdata", 6) != 0 || header.tzdata_version[11] != 0) {
|
|
fprintf(stderr, "%s: bad magic in \"%s\": \"%.6s\"\n",
|
|
__FUNCTION__, path, header.tzdata_version);
|
|
free(path);
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
#if 0
|
|
fprintf(stderr, "version: %s\n", header.tzdata_version);
|
|
fprintf(stderr, "index_offset = %d\n", ntohl(header.index_offset));
|
|
fprintf(stderr, "data_offset = %d\n", ntohl(header.data_offset));
|
|
fprintf(stderr, "zonetab_offset = %d\n", ntohl(header.zonetab_offset));
|
|
#endif
|
|
|
|
if (TEMP_FAILURE_RETRY(lseek(fd, ntohl(header.index_offset), SEEK_SET)) == -1) {
|
|
fprintf(stderr, "%s: couldn't seek to index in \"%s\": %s\n",
|
|
__FUNCTION__, path, strerror(errno));
|
|
free(path);
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
off_t specific_zone_offset = -1;
|
|
ssize_t index_size = ntohl(header.data_offset) - ntohl(header.index_offset);
|
|
char* index = malloc(index_size);
|
|
if (index == NULL) {
|
|
fprintf(stderr, "%s: couldn't allocate %zd-byte index for \"%s\"\n",
|
|
__FUNCTION__, index_size, path);
|
|
free(path);
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
if (TEMP_FAILURE_RETRY(read(fd, index, index_size)) != index_size) {
|
|
fprintf(stderr, "%s: could not read index of \"%s\": %s\n",
|
|
__FUNCTION__, path, (bytes_read == -1) ? strerror(errno) : "short read");
|
|
free(path);
|
|
free(index);
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
static const size_t NAME_LENGTH = 40;
|
|
struct index_entry_t {
|
|
char buf[NAME_LENGTH];
|
|
int32_t start;
|
|
int32_t length;
|
|
int32_t unused; // Was raw GMT offset; always 0 since tzdata2014f (L).
|
|
};
|
|
|
|
size_t id_count = (ntohl(header.data_offset) - ntohl(header.index_offset)) / sizeof(struct index_entry_t);
|
|
struct index_entry_t* entry = (struct index_entry_t*) index;
|
|
for (size_t i = 0; i < id_count; ++i) {
|
|
char this_id[NAME_LENGTH + 1];
|
|
memcpy(this_id, entry->buf, NAME_LENGTH);
|
|
this_id[NAME_LENGTH] = '\0';
|
|
|
|
if (strcmp(this_id, olson_id) == 0) {
|
|
specific_zone_offset = ntohl(entry->start) + ntohl(header.data_offset);
|
|
*data_size = ntohl(entry->length);
|
|
break;
|
|
}
|
|
|
|
++entry;
|
|
}
|
|
free(index);
|
|
|
|
if (specific_zone_offset == -1) {
|
|
XLOG(("%s: couldn't find zone \"%s\"\n", __FUNCTION__, olson_id));
|
|
free(path);
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
if (TEMP_FAILURE_RETRY(lseek(fd, specific_zone_offset, SEEK_SET)) == -1) {
|
|
fprintf(stderr, "%s: could not seek to %ld in \"%s\": %s\n",
|
|
__FUNCTION__, specific_zone_offset, path, strerror(errno));
|
|
free(path);
|
|
close(fd);
|
|
return -1;
|
|
}
|
|
|
|
// TODO: check that there's TZ_MAGIC at this offset, so we can fall back to the other file if not.
|
|
|
|
free(path);
|
|
return fd;
|
|
}
|
|
|
|
static int __bionic_open_tzdata(const char* olson_id, int* data_size) {
|
|
int fd = __bionic_open_tzdata_path("ANDROID_ROOT", "/usr/share/zoneinfo/tzdata", olson_id, data_size);
|
|
if (fd == -2) {
|
|
// The first thing that 'recovery' does is try to format the current time. It doesn't have
|
|
// any tzdata available, so we must not abort here --- doing so breaks the recovery image!
|
|
fprintf(stderr, "%s: couldn't find any tzdata when looking for %s!\n", __FUNCTION__, olson_id);
|
|
}
|
|
return fd;
|
|
}
|
|
|
|
// Caches the most recent timezone (http://b/8270865).
|
|
static int __bionic_tzload_cached(const char* name, struct state* const sp, const int doextend) {
|
|
_tzLock();
|
|
|
|
// Our single-item cache.
|
|
static char* g_cached_time_zone_name;
|
|
static struct state g_cached_time_zone;
|
|
|
|
// Do we already have this timezone cached?
|
|
if (g_cached_time_zone_name != NULL && strcmp(name, g_cached_time_zone_name) == 0) {
|
|
*sp = g_cached_time_zone;
|
|
_tzUnlock();
|
|
return 0;
|
|
}
|
|
|
|
// Can we load it?
|
|
int rc = tzload(name, sp, doextend);
|
|
if (rc == 0) {
|
|
// Update the cache.
|
|
free(g_cached_time_zone_name);
|
|
g_cached_time_zone_name = strdup(name);
|
|
g_cached_time_zone = *sp;
|
|
}
|
|
|
|
_tzUnlock();
|
|
return rc;
|
|
}
|
|
|
|
// Non-standard API: mktime(3) but with an explicit timezone parameter.
|
|
// This can't actually be hidden/removed until we fix MtpUtils.cpp
|
|
__attribute__((visibility("default"))) time_t mktime_tz(struct tm* const tmp, const char* tz) {
|
|
struct state* st = malloc(sizeof(*st));
|
|
time_t return_value;
|
|
|
|
if (st == NULL)
|
|
return 0;
|
|
if (__bionic_tzload_cached(tz, st, TRUE) != 0) {
|
|
// TODO: not sure what's best here, but for now, we fall back to gmt.
|
|
gmtload(st);
|
|
}
|
|
|
|
return_value = time1(tmp, localsub, 0L, st);
|
|
free(st);
|
|
return return_value;
|
|
}
|
|
|
|
// END android-added
|