localtime.c File Reference

#include "private.h"
#include "tzfile.h"
#include "fcntl.h"

Classes
union	input_buffer
union	local_storage
struct	lsinfo
struct	rule
struct	state
struct	ttinfo

Macros
#define	BIGGEST(a, b)   (((a) > (b)) ? (a) : (b))
#define	gmtptr   (&gmtmem)
#define	lclptr   (&lclmem)
#define	LOCALTIME_IMPLEMENTATION
#define	MY_TZNAME_MAX   255
#define	NETBSD_INSPIRED_EXTERN
#define	OPEN_MODE   O_RDONLY
#define	SMALLEST(a, b)   (((a) < (b)) ? (a) : (b))
#define	TZ_ABBR_CHAR_SET   "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 :+-._"
#define	TZ_ABBR_ERR_CHAR   '_'
#define	TZ_ABBR_MAX_LEN   16
#define	TZ_STRLEN_MAX   255
#define	TZDEFRULESTRING   ",M4.1.0,M10.5.0"
#define	WILDABBR   " "
#define	WRONG   (-1)

Enumerations
enum	r_type { JULIAN_DAY, DAY_OF_YEAR, MONTH_NTH_DAY_OF_WEEK }

Functions
char *	ctime (const time_t *timep)
char *	ctime_r (const time_t *timep, char *buf)
static int_fast32_t	detzcode (const char *const codep)
static int_fast64_t	detzcode64 (const char *const codep)
static bool	differ_by_repeat (const time_t t1, const time_t t0)
static const char *	getnum (register const char *strp, int *const nump, const int min, const int max)
static const char *	getoffset (register const char *strp, int_fast32_t *const offsetp)
static const char *ATTRIBUTE_PURE	getqzname (register const char *strp, const int delim)
static const char *	getrule (const char *strp, register struct rule *const rulep)
static const char *	getsecs (register const char *strp, int_fast32_t *const secsp)
static const char *ATTRIBUTE_PURE	getzname (register const char *strp)
static void	gmtcheck (void)
struct tm *	gmtime (const time_t *timep)
struct tm *	gmtime_r (const time_t *timep, struct tm *tmp)
static void	gmtload (struct state *const sp)
static struct tm *	gmtsub (struct state const *, time_t const *, int_fast32_t, struct tm *)
static bool	increment_overflow (int *, int)
static bool	increment_overflow32 (int_fast32_t *const lp, int const m)
static bool	increment_overflow_time (time_t *, int_fast32_t)
static void	init_ttinfo (struct ttinfo *s, int_fast32_t gmtoff, bool isdst, int abbrind)
static int ATTRIBUTE_PURE	leaps_thru_end_of (register const int y)
static struct tm *	localsub (struct state const *sp, time_t const *timep, int_fast32_t setname, struct tm *const tmp)
struct tm *	localtime (const time_t *timep)
struct tm *	localtime_r (const time_t *timep, struct tm *tmp)
struct tm *	localtime_rz (struct state *sp, time_t const *timep, struct tm *tmp)
static struct tm *	localtime_tzset (time_t const *timep, struct tm *tmp, bool setname)
static int	lock (void)
time_t	mktime (struct tm *tmp)
static time_t	mktime_tzname (struct state *sp, struct tm *tmp, bool setname)
time_t	mktime_z (struct state *sp, struct tm *tmp)
static bool	normalize_overflow (int *const tensptr, int *const unitsptr, const int base)
static bool	normalize_overflow32 (int_fast32_t *, int *, int)
static void	scrub_abbrs (struct state *sp)
static void	settzname (void)
static time_t	time1 (struct tm *const tmp, struct tm *(*funcp)(struct state const *, time_t const *, int_fast32_t, struct tm *), struct state const *sp, const int_fast32_t offset)
static time_t	time2 (struct tm *const tmp, struct tm *(*funcp)(struct state const *, time_t const *, int_fast32_t, struct tm *), struct state const *sp, const int_fast32_t offset, bool *okayp)
static time_t	time2sub (struct tm *const tmp, struct tm *(*funcp)(struct state const *, time_t const *, int_fast32_t, struct tm *), struct state const *sp, const int_fast32_t offset, bool *okayp, bool do_norm_secs)
static struct tm *	timesub (time_t const *, int_fast32_t, struct state const *, struct tm *)
static int	tmcomp (register const struct tm *const atmp, register const struct tm *const btmp)
static int_fast32_t ATTRIBUTE_PURE	transtime (const int year, register const struct rule *const rulep, const int_fast32_t offset)
static bool	typesequiv (struct state const *, int, int)
timezone_t	tzalloc (char const *name)
void	tzfree (timezone_t sp)
static int	tzload (char const *name, struct state *sp, bool doextend)
static int	tzloadbody (char const *name, struct state *sp, bool doextend, union local_storage *lsp)
static bool	tzparse (char const *, struct state *, bool)
void	tzset (void)
static void	tzset_unlocked (void)
static void	tzsetlcl (char const *name)
static void	unlock (void)
static void	update_tzname_etc (struct state const *sp, struct ttinfo const *ttisp)
static int	zoneinit (struct state *sp, char const *name)

Variables
static const char	gmt [] = "GMT"
static struct state	gmtmem
static int	lcl_is_set
static char	lcl_TZname [TZ_STRLEN_MAX+1]
static struct state	lclmem
static const int	mon_lengths [2][MONSPERYEAR]
static struct tm	tm
static const char	wildabbr [] = WILDABBR
static const int	year_lengths [2]

Macro Definition Documentation

#define BIGGEST	(		a,
			b
	)		(((a) > (b)) ? (a) : (b))

Referenced by time2sub().

#define gmtptr   (&gmtmem)

#define lclptr   (&lclmem)

Referenced by settzname(), and tzsetlcl().

#define LOCALTIME_IMPLEMENTATION

#define MY_TZNAME_MAX   255

#define NETBSD_INSPIRED_EXTERN

#define OPEN_MODE   O_RDONLY

Referenced by tzloadbody().

#define SMALLEST	(		a,
			b
	)		(((a) < (b)) ? (a) : (b))

Referenced by time2sub().

#define TZ_ABBR_CHAR_SET   "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 :+-._"

Referenced by scrub_abbrs().

#define TZ_ABBR_ERR_CHAR   '_'

Referenced by scrub_abbrs().

#define TZ_ABBR_MAX_LEN   16

Referenced by scrub_abbrs().

#define TZ_STRLEN_MAX   255

#define TZDEFRULESTRING   ",M4.1.0,M10.5.0"

Referenced by tzparse().

#define WILDABBR   " "

#define WRONG   (-1)

Referenced by time1(), and time2sub().

Enumeration Type Documentation

enum r_type

Enumerator
JULIAN_DAY
DAY_OF_YEAR
MONTH_NTH_DAY_OF_WEEK

Function Documentation

char* ctime

(

const time_t *

timep

)

References asctime(), localtime(), and tm.

char* ctime_r	(	const time_t *	timep,
		char *	buf
	)

References asctime_r(), localtime_r(), and tm.

static int_fast32_t detzcode ( const char *const  codep )

static

References TWOS_COMPLEMENT.

Referenced by tzloadbody().

static int_fast64_t detzcode64 ( const char *const  codep )

static

References int_fast64_t, TWOS_COMPLEMENT, and uint_fast64_t.

Referenced by tzloadbody().

static bool differ_by_repeat ( const time_t  t1, const time_t  t0  )

static

References SECSPERREPEAT, SECSPERREPEAT_BITS, TYPE_BIT, and TYPE_SIGNED.

Referenced by tzloadbody().

static const char* getnum ( register const char *  strp, int *const  nump, const int  min, const int  max  )

static

References is_digit.

Referenced by getrule(), and getsecs().

static const char* getoffset ( register const char *  strp, int_fast32_t *const  offsetp  )

static

References getsecs().

Referenced by getrule(), and tzparse().

static const char* ATTRIBUTE_PURE getqzname ( register const char *  strp, const int  delim  )

static

Referenced by tzparse().

static const char* getrule ( const char *  strp, register struct rule *const  rulep  )

static

References DAY_OF_YEAR, DAYSPERLYEAR, DAYSPERNYEAR, DAYSPERWEEK, getnum(), getoffset(), is_digit, JULIAN_DAY, MONSPERYEAR, MONTH_NTH_DAY_OF_WEEK, rule::r_day, rule::r_mon, rule::r_time, rule::r_type, rule::r_week, and SECSPERHOUR.

Referenced by tzparse().

static const char* getsecs ( register const char *  strp, int_fast32_t *const  secsp  )

static

References DAYSPERWEEK, getnum(), HOURSPERDAY, MINSPERHOUR, SECSPERHOUR, and SECSPERMIN.

Referenced by getoffset().

static const char* ATTRIBUTE_PURE getzname ( register const char *  strp )

static

References is_digit.

Referenced by tzparse().

static void gmtcheck ( void  )

static

References gmtload(), lock(), and unlock().

Referenced by gmtime_r(), and mktime_tzname().

struct tm* gmtime

(

const time_t *

timep

)

References gmtime_r(), and tm.

struct tm* gmtime_r	(	const time_t *	timep,
		struct tm *	tmp
	)

References gmtcheck(), and gmtsub().

Referenced by gmtime(), and my_gmtime_r().

static void gmtload ( struct state *const  sp )

static

References gmt, tzload(), and tzparse().

Referenced by gmtcheck().

static struct tm * gmtsub ( struct state const *  sp, time_t const *  timep, int_fast32_t  offset, struct tm *  tmp  )

static

References state::chars, gmt, timesub(), tm, and wildabbr.

Referenced by gmtime_r(), localsub(), and mktime_tzname().

static bool increment_overflow ( int *  ip, int  j  )

static

Referenced by normalize_overflow(), time2sub(), and timesub().

static bool increment_overflow32 ( int_fast32_t *const  lp, int const  m  )

static

References INT_FAST32_MAX, and INT_FAST32_MIN.

Referenced by normalize_overflow32(), and time2sub().

static bool increment_overflow_time ( time_t *  tp, int_fast32_t  j  )

static

References time_t_max, time_t_min, and TYPE_SIGNED.

Referenced by time2sub(), and tzparse().

static void init_ttinfo ( struct ttinfo *  s, int_fast32_t  gmtoff, bool  isdst, int  abbrind  )

static

References gmtoff(), ttinfo::tt_abbrind, ttinfo::tt_gmtoff, ttinfo::tt_isdst, ttinfo::tt_ttisgmt, and ttinfo::tt_ttisstd.

Referenced by tzparse(), and zoneinit().

static int ATTRIBUTE_PURE leaps_thru_end_of ( register const int  y )

static

Referenced by timesub().

static struct tm* localsub ( struct state const *  sp, time_t const *  timep, int_fast32_t  setname, struct tm *const  tmp  )

static

References state::ats, AVGSECSPERYEAR, state::chars, state::defaulttype, gmtsub(), state::goahead, state::goback, int_fast64_t, SECSPERREPEAT, state::timecnt, timesub(), tm, ttinfo::tt_abbrind, ttinfo::tt_gmtoff, ttinfo::tt_isdst, state::ttis, state::types, update_tzname_etc(), and YEARSPERREPEAT.

Referenced by localtime_rz(), localtime_tzset(), and mktime_tzname().

struct tm* localtime

(

const time_t *

timep

)

References localtime_tzset(), and tm.

Referenced by ctime(), display(), and localtime_r().

struct tm* localtime_r	(	const time_t *	timep,
		struct tm *	tmp
	)

References localtime_tzset().

Referenced by ctime_r().

struct tm* localtime_rz	(	struct state *	sp,
		time_t const *	timep,
		struct tm *	tmp
	)

References localsub().

static struct tm* localtime_tzset ( time_t const *  timep, struct tm *  tmp, bool  setname  )

static

References localsub(), lock(), tzset_unlocked(), and unlock().

Referenced by localtime(), and localtime_r().

static int lock ( void  )

static

Referenced by gmtcheck(), localtime_tzset(), mktime(), and tzset().

time_t mktime

(

struct tm *

tmp

)

References lock(), mktime_tzname(), tzset_unlocked(), and unlock().

Referenced by _fmt().

static time_t mktime_tzname ( struct state *  sp, struct tm *  tmp, bool  setname  )

static

References gmtcheck(), gmtsub(), localsub(), and time1().

Referenced by mktime(), and mktime_z().

time_t mktime_z	(	struct state *	sp,
		struct tm *	tmp
	)

References mktime_tzname().

static bool normalize_overflow ( int *const  tensptr, int *const  unitsptr, const int  base  )

static

References increment_overflow().

Referenced by time2sub().

static bool normalize_overflow32 ( int_fast32_t *  tensptr, int *  unitsptr, int  base  )

static

References increment_overflow32().

Referenced by time2sub().

static void scrub_abbrs ( struct state *  sp )

static

References state::charcnt, state::chars, GRANDPARENTED, ttinfo::tt_abbrind, state::ttis, state::typecnt, TZ_ABBR_CHAR_SET, TZ_ABBR_ERR_CHAR, and TZ_ABBR_MAX_LEN.

Referenced by zoneinit().

static void settzname ( void  )

static

References gmt, lclptr, state::timecnt, ttinfo::tt_isdst, state::ttis, state::typecnt, state::types, update_tzname_etc(), and wildabbr.

Referenced by tzsetlcl().

static time_t time1 ( struct tm *const  tmp, struct tm *(*)(struct state const *, time_t const *, int_fast32_t, struct tm *)  funcp, struct state const *  sp, const int_fast32_t  offset  )

static

References time2(), state::timecnt, ttinfo::tt_gmtoff, ttinfo::tt_isdst, state::ttis, state::typecnt, state::types, TZ_MAX_TYPES, and WRONG.

Referenced by difftime(), and mktime_tzname().

static time_t time2 ( struct tm *const  tmp, struct tm *(*)(struct state const *, time_t const *, int_fast32_t, struct tm *)  funcp, struct state const *  sp, const int_fast32_t  offset, bool *  okayp  )

static

References time2sub().

Referenced by time1().

static time_t time2sub ( struct tm *const  tmp, struct tm *(*)(struct state const *, time_t const *, int_fast32_t, struct tm *)  funcp, struct state const *  sp, const int_fast32_t  offset, bool *  okayp, bool  do_norm_secs  )

static

References BIGGEST, DAYSPERLYEAR, EPOCH_YEAR, HOURSPERDAY, increment_overflow(), increment_overflow32(), increment_overflow_time(), INT_FAST32_MAX, INT_FAST32_MIN, isleap, MINSPERHOUR, MONSPERYEAR, normalize_overflow(), normalize_overflow32(), SECSPERDAY, SECSPERMIN, SMALLEST, time_t_max, time_t_min, tm, TM_YEAR_BASE, tmcomp(), ttinfo::tt_gmtoff, ttinfo::tt_isdst, state::ttis, state::typecnt, and WRONG.

Referenced by time2().

static struct tm * timesub ( time_t const *  timep, int_fast32_t  offset, struct state const *  sp, struct tm *  tmp  )

static

References corr, DAYSPERLYEAR, DAYSPERNYEAR, DAYSPERWEEK, EOVERFLOW, EPOCH_WDAY, EPOCH_YEAR, increment_overflow(), int_fast64_t, isleap, state::leapcnt, leaps_thru_end_of(), lsinfo::ls_corr, lsinfo::ls_trans, state::lsis, SECSPERDAY, SECSPERHOUR, SECSPERMIN, TM_YEAR_BASE, and TYPE_SIGNED.

Referenced by gmtsub(), and localsub().

static int tmcomp ( register const struct tm *const  atmp, register const struct tm *const  btmp  )

static

Referenced by time2sub().

static int_fast32_t ATTRIBUTE_PURE transtime ( const int  year, register const struct rule *const  rulep, const int_fast32_t  offset  )

static

References DAY_OF_YEAR, DAYSPERWEEK, INITIALIZE, isleap, JULIAN_DAY, MONTH_NTH_DAY_OF_WEEK, rule::r_day, rule::r_mon, rule::r_time, rule::r_type, rule::r_week, and SECSPERDAY.

Referenced by tzparse().

static bool typesequiv ( struct state const *  sp, int  a, int  b  )

static

References state::chars, ttinfo::tt_abbrind, ttinfo::tt_gmtoff, ttinfo::tt_isdst, ttinfo::tt_ttisgmt, ttinfo::tt_ttisstd, state::ttis, and state::typecnt.

Referenced by tzloadbody().

timezone_t tzalloc

(

char const *

name

)

References zoneinit().

void tzfree

(

timezone_t

sp

)

static int tzload ( char const *  name, struct state *  sp, bool  doextend  )

static

References tzloadbody().

Referenced by gmtload(), tzparse(), and zoneinit().

static int tzloadbody ( char const *  name, struct state *  sp, bool  doextend, union local_storage *  lsp  )

static

References state::ats, input_buffer::buf, state::charcnt, charcnt, state::chars, corr, state::defaulttype, detzcode(), detzcode64(), differ_by_repeat(), ENAMETOOLONG, local_storage::fullname, state::goahead, state::goback, int_fast64_t, state::leapcnt, leapcnt, lsinfo::ls_corr, lsinfo::ls_trans, state::lsis, OPEN_MODE, R_OK, time_t_max, time_t_min, state::timecnt, timecnt, trans, ttinfo::tt_abbrind, ttinfo::tt_gmtoff, ttinfo::tt_isdst, ttinfo::tt_ttisgmt, ttinfo::tt_ttisstd, state::ttis, TYPE_SIGNED, state::typecnt, typecnt, state::types, typesequiv(), TZ_MAX_CHARS, TZ_MAX_LEAPS, TZ_MAX_TIMES, TZ_MAX_TYPES, TZDEFAULT, TZDIR, tzhead::tzh_charcnt, tzhead::tzh_leapcnt, tzhead::tzh_timecnt, tzhead::tzh_ttisgmtcnt, tzhead::tzh_ttisstdcnt, tzhead::tzh_typecnt, tzhead::tzh_version, input_buffer::tzhead, tzparse(), and local_storage::u.

Referenced by tzload().

static bool tzparse ( char const *  name, struct state *  sp, bool  lastditch  )

static

References state::ats, state::charcnt, charcnt, state::chars, state::defaulttype, EPOCH_YEAR, getoffset(), getqzname(), getrule(), getzname(), gmt, increment_overflow_time(), init_ttinfo(), isleap, state::leapcnt, SECSPERDAY, SECSPERHOUR, state::timecnt, timecnt, transtime(), ttinfo::tt_gmtoff, ttinfo::tt_isdst, ttinfo::tt_ttisgmt, ttinfo::tt_ttisstd, state::ttis, state::typecnt, state::types, TZ_MAX_TIMES, TZDEFRULES, TZDEFRULESTRING, tzload(), and YEARSPERREPEAT.

Referenced by gmtload(), tzloadbody(), and zoneinit().

void tzset

(

void

)

References lock(), tzset_unlocked(), and unlock().

Referenced by strftime(), and tzalloc().

static void tzset_unlocked ( void  )

static

References tzsetlcl().

Referenced by localtime_tzset(), mktime(), and tzset().

static void tzsetlcl ( char const *  name )

static

References lclptr, settzname(), and zoneinit().

Referenced by tzset_unlocked().

static void unlock ( void  )

static

Referenced by gmtcheck(), localtime_tzset(), mktime(), and tzset().

static void update_tzname_etc ( struct state const *  sp, struct ttinfo const *  ttisp  )

static

References state::chars, ttinfo::tt_abbrind, ttinfo::tt_gmtoff, and ttinfo::tt_isdst.

Referenced by localsub(), and settzname().

static int zoneinit ( struct state *  sp, char const *  name  )

static

References state::charcnt, state::chars, state::defaulttype, gmt, state::goahead, state::goback, init_ttinfo(), state::leapcnt, scrub_abbrs(), state::timecnt, state::ttis, state::typecnt, tzload(), and tzparse().

Referenced by tzalloc(), and tzsetlcl().

Variable Documentation

const char gmt[] = "GMT"

static

Referenced by gmtload(), gmtsub(), settzname(), tzparse(), and zoneinit().

struct state gmtmem

static

int lcl_is_set

static

char lcl_TZname[TZ_STRLEN_MAX+1]

static

struct state lclmem

static

const int mon_lengths[2][MONSPERYEAR]

static

Initial value:

= {
        { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
        { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
}

struct tm tm

static

Referenced by _fmt(), ctime(), ctime_r(), display(), gmtime(), gmtoff(), gmtsub(), hunt(), localsub(), localtime(), localtime_r(), main(), parseTime(), show(), time2sub(), timeout(), and TimeStamp::TimeStamp().

const char wildabbr[] = WILDABBR

static

Referenced by gmtsub(), and settzname().

const int year_lengths[2]

static

Initial value:

= {
        DAYSPERNYEAR, DAYSPERLYEAR
}