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platform_bionic/libc/tzcode/private.h
Elliott Hughes 9fb22a3ec4 Sync with upstream tzcode (2015g). 
This is quite a large patch because we haven't updated for some time,
but the good news is that upstream is now thread-safe so a lot of our
changes go away in this update and the remaining diff is a lot smaller.

(Note that our whitespace still doesn't match upstream. I use diff -wub
to compare. Upstream doesn't even really have a consistent style. New
code seems to be two spaces, old code tabs.)

From the intervening changelogs (eliding the changes that only affected
the tools, which we don't use):

2014a:
     An uninitialized-storage bug in 'localtime' has been fixed.
     (Thanks to Logan Chien.)

2014b:
     'zic' and 'localtime' no longer reject locations needing four
     transitions per year for the forseeable future.  (Thanks to Andrew
     Main (Zefram).)

2014c:
     <None>

2014d:
     <None>

2014e:
     <None>

2014f:
     'localtime', 'mktime', etc. now use much less stack space if
     ALL_STATE is defined.  (Thanks to Elliott Hughes for reporting the
     problem.)

     Some lint has been removed when using GCC_DEBUG_FLAGS with GCC
     4.9.0.

2014g:
     Unless NETBSD_INSPIRED is defined to 0, the tz library now
     supplies functions for creating and using objects that represent
     time zones. The new functions are tzalloc, tzfree, localtime_rz,
     mktime_z, and (if STD_INSPIRED is also defined) posix2time_z and
     time2posix_z.  They are intended for performance: for example,
     localtime_rz (unlike localtime_r) is trivially thread-safe without
     locking.  (Thanks to Christos Zoulas for proposing NetBSD-inspired
     functions, and to Alan Barrett and Jonathan Lennox for helping to
     debug the change.)

     If THREAD_SAFE is defined to 1, the tz library is now thread-safe.
     Although not needed for tz's own applications, which are single-threaded,
     this supports POSIX better if the tz library is used in multithreaded apps.

     Some crashes have been fixed when zdump or the tz library is given
     invalid or outlandish input.

     The tz library no longer mishandles leap seconds on platforms with
     unsigned time_t in time zones that lack ordinary transitions after 1970.

     The tz code now attempts to infer TM_GMTOFF and TM_ZONE if not
     already defined, to make it easier to configure on common platforms.
     Define NO_TM_GMTOFF and NO_TM_ZONE to suppress this.

     Unless the new macro UNINIT_TRAP is defined to 1, the tz code now
     assumes that reading uninitialized memory yields garbage values
     but does not cause other problems such as traps.

     If TM_GMTOFF is defined and UNINIT_TRAP is 0, mktime is now
     more likely to guess right for ambiguous time stamps near
     transitions where tm_isdst does not change.

     If HAVE_STRFTIME_L is defined to 1, the tz library now defines
     strftime_l for compatibility with recent versions of POSIX.
     Only the C locale is supported, though.  HAVE_STRFTIME_L defaults
     to 1 on recent POSIX versions, and to 0 otherwise.

     tzselect -c now uses a hybrid distance measure that works better
     in Africa.  (Thanks to Alan Barrett for noting the problem.)

     The C source code now ports to NetBSD when GCC_DEBUG_FLAGS is used,
     or when time_tz is defined.

     When HAVE_UTMPX_H is set the 'date' command now builds on systems
     whose <utmpx.h> file does not define WTMPX_FILE, and when setting
     the date it updates the wtmpx file if _PATH_WTMPX is defined.
     This affects GNU/Linux and similar systems.

     For easier maintenance later, some C code has been simplified,
     some lint has been removed, and the code has been tweaked so that
     plain 'make' is more likely to work.

     The C type 'bool' is now used for boolean values, instead of 'int'.

     The long-obsolete LOCALE_HOME code has been removed.

     The long-obsolete 'gtime' function has been removed.

2014h:
     The tz library's localtime and mktime functions now set tzname to a value
     appropriate for the requested time stamp, and zdump now uses this
     on platforms not defining TM_ZONE, fixing a 2014g regression.
     (Thanks to Tim Parenti for reporting the problem.)

     The tz library no longer sets tzname if localtime or mktime fails.

     An access to uninitalized data has been fixed.
     (Thanks to Jörg Richter for reporting the problem.)

     When THREAD_SAFE is defined, the code ports to the C11 memory model.
     A memory leak has been fixed if ALL_STATE and THREAD_SAFE are defined
     and two threads race to initialize data used by gmtime-like functions.
     (Thanks to Andy Heninger for reporting the problems.)

2014i:
     The time-related library functions now set errno on failure,
     and some crashes in the new tzalloc-related library functions
     have been fixed.  (Thanks to Christos Zoulas for reporting
     most of these problems and for suggesting fixes.)

     If USG_COMPAT is defined and the requested time stamp is
     standard time, the tz library's localtime and mktime functions
     now set the extern variable timezone to a value appropriate
     for that time stamp; and similarly for ALTZONE, daylight
     saving time, and the altzone variable.  This change is a
     companion to the tzname change in 2014h, and is designed to
     make timezone and altzone more compatible with tzname.

     The tz library's functions now set errno to EOVERFLOW if they
     fail because the result cannot be represented.  ctime and
     ctime_r now return NULL and set errno when a time stamp is out
     of range, rather than having undefined behavior.

     Some bugs associated with the new 2014g functions have been
     fixed.  This includes a bug that largely incapacitated the new
     functions time2posix_z and posix2time_z.  (Thanks to Christos
     Zoulas.)  It also includes some uses of uninitialized
     variables after tzalloc.  The new code uses the standard type
     'ssize_t', which the Makefile now gives porting advice about.

2014j:
     <None>

2015a:
     tzalloc now scrubs time zone abbreviations compatibly with the way
     that tzset always has, by replacing invalid bytes with '_' and by
     shortening too-long abbreviations.

2015b:
     Fix integer overflow bug in reference 'mktime' implementation.
     (Problem reported by Jörg Richter.)

     Allow -Dtime_tz=time_t compilations, and allow -Dtime_tz=... libraries
     to be used in the same executable as standard-library time_t functions.
     (Problems reported by Bradley White.)

2015c:
     <None>

2015d:
     <None>

2015e:
     <None>

2015f:
     <None>

2015g:
    localtime no longer mishandles America/Anchorage after 2037.
    (Thanks to Bradley White for reporting the bug.)

    On hosts with signed 32-bit time_t, localtime no longer mishandles
    Pacific/Fiji after 2038-01-16 14:00 UTC.

    The localtime module allows the variables 'timezone', 'daylight',
    and 'altzone' to be in common storage shared with other modules,
    and declares them in case the system <time.h> does not.
    (Problems reported by Kees Dekker.)

    On platforms with tm_zone, strftime.c now assumes it is not NULL.
    This simplifies the code and is consistent with zdump.c.
    (Problem reported by Christos Zoulas.)

Change-Id: I9eb0a8323cb8bd9968fcfe612dc14f45aa3b59d2
2015-10-09 15:15:39 -07:00

578 lines
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C
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#ifndef PRIVATE_H
#define PRIVATE_H
/*
** This file is in the public domain, so clarified as of
** 1996-06-05 by Arthur David Olson.
*/
/*
** This header is for use ONLY with the time conversion code.
** There is no guarantee that it will remain unchanged,
** or that it will remain at all.
** Do NOT copy it to any system include directory.
** Thank you!
*/
#define GRANDPARENTED "Local time zone must be set--see zic manual page"
/*
** Defaults for preprocessor symbols.
** You can override these in your C compiler options, e.g. '-DHAVE_GETTEXT=1'.
*/
#ifndef HAVE_GETTEXT
#define HAVE_GETTEXT 0
#endif /* !defined HAVE_GETTEXT */
#ifndef HAVE_INCOMPATIBLE_CTIME_R
#define HAVE_INCOMPATIBLE_CTIME_R 0
#endif /* !defined INCOMPATIBLE_CTIME_R */
#ifndef HAVE_LINK
#define HAVE_LINK 1
#endif /* !defined HAVE_LINK */
#ifndef HAVE_STRDUP
#define HAVE_STRDUP 1
#endif
#ifndef HAVE_SYMLINK
#define HAVE_SYMLINK 1
#endif /* !defined HAVE_SYMLINK */
#ifndef HAVE_SYS_STAT_H
#define HAVE_SYS_STAT_H 1
#endif /* !defined HAVE_SYS_STAT_H */
#ifndef HAVE_SYS_WAIT_H
#define HAVE_SYS_WAIT_H 1
#endif /* !defined HAVE_SYS_WAIT_H */
#ifndef HAVE_UNISTD_H
#define HAVE_UNISTD_H 1
#endif /* !defined HAVE_UNISTD_H */
#ifndef HAVE_UTMPX_H
#define HAVE_UTMPX_H 1
#endif /* !defined HAVE_UTMPX_H */
#ifndef NETBSD_INSPIRED
# define NETBSD_INSPIRED 1
#endif
#if HAVE_INCOMPATIBLE_CTIME_R
#define asctime_r _incompatible_asctime_r
#define ctime_r _incompatible_ctime_r
#endif /* HAVE_INCOMPATIBLE_CTIME_R */
/* Enable tm_gmtoff and tm_zone on GNUish systems. */
#define _GNU_SOURCE 1
/* Fix asctime_r on Solaris 10. */
#define _POSIX_PTHREAD_SEMANTICS 1
/* Enable strtoimax on Solaris 10. */
#define __EXTENSIONS__ 1
/*
** Nested includes
*/
/* Avoid clashes with NetBSD by renaming NetBSD's declarations. */
#define localtime_rz sys_localtime_rz
#define mktime_z sys_mktime_z
#define posix2time_z sys_posix2time_z
#define time2posix_z sys_time2posix_z
#define timezone_t sys_timezone_t
#define tzalloc sys_tzalloc
#define tzfree sys_tzfree
#include <time.h>
#undef localtime_rz
#undef mktime_z
#undef posix2time_z
#undef time2posix_z
#undef timezone_t
#undef tzalloc
#undef tzfree
#include "sys/types.h" /* for time_t */
#include "stdio.h"
#include "string.h"
#include "limits.h" /* for CHAR_BIT et al. */
#include "stdlib.h"
#include "errno.h"
#ifndef ENAMETOOLONG
# define ENAMETOOLONG EINVAL
#endif
#ifndef EOVERFLOW
# define EOVERFLOW EINVAL
#endif
#if HAVE_GETTEXT
#include "libintl.h"
#endif /* HAVE_GETTEXT */
#if HAVE_SYS_WAIT_H
#include <sys/wait.h> /* for WIFEXITED and WEXITSTATUS */
#endif /* HAVE_SYS_WAIT_H */
#ifndef WIFEXITED
#define WIFEXITED(status) (((status) & 0xff) == 0)
#endif /* !defined WIFEXITED */
#ifndef WEXITSTATUS
#define WEXITSTATUS(status) (((status) >> 8) & 0xff)
#endif /* !defined WEXITSTATUS */
#if HAVE_UNISTD_H
#include "unistd.h" /* for F_OK, R_OK, and other POSIX goodness */
#endif /* HAVE_UNISTD_H */
#ifndef HAVE_STRFTIME_L
# if _POSIX_VERSION < 200809
# define HAVE_STRFTIME_L 0
# else
# define HAVE_STRFTIME_L 1
# endif
#endif
#ifndef F_OK
#define F_OK 0
#endif /* !defined F_OK */
#ifndef R_OK
#define R_OK 4
#endif /* !defined R_OK */
/* Unlike <ctype.h>'s isdigit, this also works if c < 0 | c > UCHAR_MAX. */
#define is_digit(c) ((unsigned)(c) - '0' <= 9)
/*
** Define HAVE_STDINT_H's default value here, rather than at the
** start, since __GLIBC__'s value depends on previously-included
** files.
** (glibc 2.1 and later have stdint.h, even with pre-C99 compilers.)
*/
#ifndef HAVE_STDINT_H
#define HAVE_STDINT_H \
(199901 <= __STDC_VERSION__ \
|| 2 < __GLIBC__ + (1 <= __GLIBC_MINOR__) \
|| __CYGWIN__)
#endif /* !defined HAVE_STDINT_H */
#if HAVE_STDINT_H
#include "stdint.h"
#endif /* !HAVE_STDINT_H */
#ifndef HAVE_INTTYPES_H
# define HAVE_INTTYPES_H HAVE_STDINT_H
#endif
#if HAVE_INTTYPES_H
# include <inttypes.h>
#endif
/* Pre-C99 GCC compilers define __LONG_LONG_MAX__ instead of LLONG_MAX. */
#ifdef __LONG_LONG_MAX__
# ifndef LLONG_MAX
# define LLONG_MAX __LONG_LONG_MAX__
# endif
# ifndef LLONG_MIN
# define LLONG_MIN (-1 - LLONG_MAX)
# endif
#endif
#ifndef INT_FAST64_MAX
# ifdef LLONG_MAX
typedef long long int_fast64_t;
# define INT_FAST64_MIN LLONG_MIN
# define INT_FAST64_MAX LLONG_MAX
# else
# if LONG_MAX >> 31 < 0xffffffff
Please use a compiler that supports a 64-bit integer type (or wider);
you may need to compile with "-DHAVE_STDINT_H".
# endif
typedef long int_fast64_t;
# define INT_FAST64_MIN LONG_MIN
# define INT_FAST64_MAX LONG_MAX
# endif
#endif
#ifndef SCNdFAST64
# if INT_FAST64_MAX == LLONG_MAX
# define SCNdFAST64 "lld"
# else
# define SCNdFAST64 "ld"
# endif
#endif
#ifndef INT_FAST32_MAX
# if INT_MAX >> 31 == 0
typedef long int_fast32_t;
# define INT_FAST32_MAX LONG_MAX
# define INT_FAST32_MIN LONG_MIN
# else
typedef int int_fast32_t;
# define INT_FAST32_MAX INT_MAX
# define INT_FAST32_MIN INT_MIN
# endif
#endif
#ifndef INTMAX_MAX
# ifdef LLONG_MAX
typedef long long intmax_t;
# define strtoimax strtoll
# define INTMAX_MAX LLONG_MAX
# define INTMAX_MIN LLONG_MIN
# else
typedef long intmax_t;
# define strtoimax strtol
# define INTMAX_MAX LONG_MAX
# define INTMAX_MIN LONG_MIN
# endif
#endif
#ifndef PRIdMAX
# if INTMAX_MAX == LLONG_MAX
# define PRIdMAX "lld"
# else
# define PRIdMAX "ld"
# endif
#endif
#ifndef UINT_FAST64_MAX
# if defined ULLONG_MAX || defined __LONG_LONG_MAX__
typedef unsigned long long uint_fast64_t;
# else
# if ULONG_MAX >> 31 >> 1 < 0xffffffff
Please use a compiler that supports a 64-bit integer type (or wider);
you may need to compile with "-DHAVE_STDINT_H".
# endif
typedef unsigned long uint_fast64_t;
# endif
#endif
#ifndef UINTMAX_MAX
# if defined ULLONG_MAX || defined __LONG_LONG_MAX__
typedef unsigned long long uintmax_t;
# else
typedef unsigned long uintmax_t;
# endif
#endif
#ifndef PRIuMAX
# if defined ULLONG_MAX || defined __LONG_LONG_MAX__
# define PRIuMAX "llu"
# else
# define PRIuMAX "lu"
# endif
#endif
#ifndef INT32_MAX
#define INT32_MAX 0x7fffffff
#endif /* !defined INT32_MAX */
#ifndef INT32_MIN
#define INT32_MIN (-1 - INT32_MAX)
#endif /* !defined INT32_MIN */
#ifndef SIZE_MAX
#define SIZE_MAX ((size_t) -1)
#endif
#if 2 < __GNUC__ + (96 <= __GNUC_MINOR__)
# define ATTRIBUTE_CONST __attribute__ ((const))
# define ATTRIBUTE_PURE __attribute__ ((__pure__))
# define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
#else
# define ATTRIBUTE_CONST /* empty */
# define ATTRIBUTE_PURE /* empty */
# define ATTRIBUTE_FORMAT(spec) /* empty */
#endif
#if !defined _Noreturn && __STDC_VERSION__ < 201112
# if 2 < __GNUC__ + (8 <= __GNUC_MINOR__)
# define _Noreturn __attribute__ ((__noreturn__))
# else
# define _Noreturn
# endif
#endif
#if __STDC_VERSION__ < 199901 && !defined restrict
# define restrict /* empty */
#endif
/*
** Workarounds for compilers/systems.
*/
/*
** Compile with -Dtime_tz=T to build the tz package with a private
** time_t type equivalent to T rather than the system-supplied time_t.
** This debugging feature can test unusual design decisions
** (e.g., time_t wider than 'long', or unsigned time_t) even on
** typical platforms.
*/
#ifdef time_tz
# ifdef LOCALTIME_IMPLEMENTATION
static time_t sys_time(time_t *x) { return time(x); }
# endif
typedef time_tz tz_time_t;
# undef ctime
# define ctime tz_ctime
# undef ctime_r
# define ctime_r tz_ctime_r
# undef difftime
# define difftime tz_difftime
# undef gmtime
# define gmtime tz_gmtime
# undef gmtime_r
# define gmtime_r tz_gmtime_r
# undef localtime
# define localtime tz_localtime
# undef localtime_r
# define localtime_r tz_localtime_r
# undef localtime_rz
# define localtime_rz tz_localtime_rz
# undef mktime
# define mktime tz_mktime
# undef mktime_z
# define mktime_z tz_mktime_z
# undef offtime
# define offtime tz_offtime
# undef posix2time
# define posix2time tz_posix2time
# undef posix2time_z
# define posix2time_z tz_posix2time_z
# undef time
# define time tz_time
# undef time2posix
# define time2posix tz_time2posix
# undef time2posix_z
# define time2posix_z tz_time2posix_z
# undef time_t
# define time_t tz_time_t
# undef timegm
# define timegm tz_timegm
# undef timelocal
# define timelocal tz_timelocal
# undef timeoff
# define timeoff tz_timeoff
# undef tzalloc
# define tzalloc tz_tzalloc
# undef tzfree
# define tzfree tz_tzfree
# undef tzset
# define tzset tz_tzset
# undef tzsetwall
# define tzsetwall tz_tzsetwall
char *ctime(time_t const *);
char *ctime_r(time_t const *, char *);
double difftime(time_t, time_t);
struct tm *gmtime(time_t const *);
struct tm *gmtime_r(time_t const *restrict, struct tm *restrict);
struct tm *localtime(time_t const *);
struct tm *localtime_r(time_t const *restrict, struct tm *restrict);
time_t mktime(struct tm *);
time_t time(time_t *);
void tzset(void);
#endif
/*
** Some time.h implementations don't declare asctime_r.
** Others might define it as a macro.
** Fix the former without affecting the latter.
** Similarly for timezone, daylight, and altzone.
*/
#ifndef asctime_r
extern char * asctime_r(struct tm const *restrict, char *restrict);
#endif
#ifdef USG_COMPAT
# ifndef timezone
extern long timezone;
# endif
# ifndef daylight
extern int daylight;
# endif
#endif
#if defined ALTZONE && !defined altzone
extern long altzone;
#endif
/*
** The STD_INSPIRED functions are similar, but most also need
** declarations if time_tz is defined.
*/
#ifdef STD_INSPIRED
# if !defined tzsetwall || defined time_tz
void tzsetwall(void);
# endif
# if !defined offtime || defined time_tz
struct tm *offtime(time_t const *, long);
# endif
# if !defined timegm || defined time_tz
time_t timegm(struct tm *);
# endif
# if !defined timelocal || defined time_tz
time_t timelocal(struct tm *);
# endif
# if !defined timeoff || defined time_tz
time_t timeoff(struct tm *, long);
# endif
# if !defined time2posix || defined time_tz
time_t time2posix(time_t);
# endif
# if !defined posix2time || defined time_tz
time_t posix2time(time_t);
# endif
#endif
/* Infer TM_ZONE on systems where this information is known, but suppress
guessing if NO_TM_ZONE is defined. Similarly for TM_GMTOFF. */
#if (defined __GLIBC__ \
|| defined __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__ \
|| (defined __APPLE__ && defined __MACH__))
# if !defined TM_GMTOFF && !defined NO_TM_GMTOFF
# define TM_GMTOFF tm_gmtoff
# endif
# if !defined TM_ZONE && !defined NO_TM_ZONE
# define TM_ZONE tm_zone
# endif
#endif
/*
** Define functions that are ABI compatible with NetBSD but have
** better prototypes. NetBSD 6.1.4 defines a pointer type timezone_t
** and labors under the misconception that 'const timezone_t' is a
** pointer to a constant. This use of 'const' is ineffective, so it
** is not done here. What we call 'struct state' NetBSD calls
** 'struct __state', but this is a private name so it doesn't matter.
*/
#if NETBSD_INSPIRED
typedef struct state *timezone_t;
struct tm *localtime_rz(timezone_t restrict, time_t const *restrict,
struct tm *restrict);
time_t mktime_z(timezone_t restrict, struct tm *restrict);
timezone_t tzalloc(char const *);
void tzfree(timezone_t);
# ifdef STD_INSPIRED
# if !defined posix2time_z || defined time_tz
time_t posix2time_z(timezone_t, time_t) ATTRIBUTE_PURE;
# endif
# if !defined time2posix_z || defined time_tz
time_t time2posix_z(timezone_t, time_t) ATTRIBUTE_PURE;
# endif
# endif
#endif
/*
** Finally, some convenience items.
*/
#if __STDC_VERSION__ < 199901
# define true 1
# define false 0
# define bool int
#else
# include <stdbool.h>
#endif
#ifndef TYPE_BIT
#define TYPE_BIT(type) (sizeof (type) * CHAR_BIT)
#endif /* !defined TYPE_BIT */
#ifndef TYPE_SIGNED
#define TYPE_SIGNED(type) (((type) -1) < 0)
#endif /* !defined TYPE_SIGNED */
#define TWOS_COMPLEMENT(t) ((t) ~ (t) 0 < 0)
/* Max and min values of the integer type T, of which only the bottom
B bits are used, and where the highest-order used bit is considered
to be a sign bit if T is signed. */
#define MAXVAL(t, b) \
((t) (((t) 1 << ((b) - 1 - TYPE_SIGNED(t))) \
- 1 + ((t) 1 << ((b) - 1 - TYPE_SIGNED(t)))))
#define MINVAL(t, b) \
((t) (TYPE_SIGNED(t) ? - TWOS_COMPLEMENT(t) - MAXVAL(t, b) : 0))
/* The minimum and maximum finite time values. This assumes no padding. */
static time_t const time_t_min = MINVAL(time_t, TYPE_BIT(time_t));
static time_t const time_t_max = MAXVAL(time_t, TYPE_BIT(time_t));
#ifndef INT_STRLEN_MAXIMUM
/*
** 302 / 1000 is log10(2.0) rounded up.
** Subtract one for the sign bit if the type is signed;
** add one for integer division truncation;
** add one more for a minus sign if the type is signed.
*/
#define INT_STRLEN_MAXIMUM(type) \
((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + \
1 + TYPE_SIGNED(type))
#endif /* !defined INT_STRLEN_MAXIMUM */
/*
** INITIALIZE(x)
*/
#ifdef lint
# define INITIALIZE(x) ((x) = 0)
#else
# define INITIALIZE(x)
#endif
#ifndef UNINIT_TRAP
# define UNINIT_TRAP 0
#endif
/*
** For the benefit of GNU folk...
** '_(MSGID)' uses the current locale's message library string for MSGID.
** The default is to use gettext if available, and use MSGID otherwise.
*/
#ifndef _
#if HAVE_GETTEXT
#define _(msgid) gettext(msgid)
#else /* !HAVE_GETTEXT */
#define _(msgid) msgid
#endif /* !HAVE_GETTEXT */
#endif /* !defined _ */
#if !defined TZ_DOMAIN && defined HAVE_GETTEXT
# define TZ_DOMAIN "tz"
#endif
#if HAVE_INCOMPATIBLE_CTIME_R
#undef asctime_r
#undef ctime_r
char *asctime_r(struct tm const *, char *);
char *ctime_r(time_t const *, char *);
#endif /* HAVE_INCOMPATIBLE_CTIME_R */
#ifndef YEARSPERREPEAT
#define YEARSPERREPEAT 400 /* years before a Gregorian repeat */
#endif /* !defined YEARSPERREPEAT */
/*
** The Gregorian year averages 365.2425 days, which is 31556952 seconds.
*/
#ifndef AVGSECSPERYEAR
#define AVGSECSPERYEAR 31556952L
#endif /* !defined AVGSECSPERYEAR */
#ifndef SECSPERREPEAT
#define SECSPERREPEAT ((int_fast64_t) YEARSPERREPEAT * (int_fast64_t) AVGSECSPERYEAR)
#endif /* !defined SECSPERREPEAT */
#ifndef SECSPERREPEAT_BITS
#define SECSPERREPEAT_BITS 34 /* ceil(log2(SECSPERREPEAT)) */
#endif /* !defined SECSPERREPEAT_BITS */
#endif /* !defined PRIVATE_H */
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