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glibc/timezone/private.h
Paul Eggert 670a687dea Update timezone code from tzcode 2015g. 
This patch updates the timezone code from tzcode 2015g.  The Makefile
and README changes are based on those in Paul's patch
<https://sourceware.org/ml/libc-alpha/2015-05/msg00553.html>.

Tested for x86_64 and x86.

2016-01-06  Paul Eggert  <eggert@cs.ucla.edu>
	    Joseph Myers  <joseph@codesourcery.com>

	* timezone/private.h: Update from tzcode 2015g.
	* timezone/tzfile.h: Likewise.
	* timezone/tzselect.ksh: Likewise.
	* timezone/zdump.c: Likewise.
	* timezone/zic.c: Likewise.
	* timezone/ialloc.c: Remove file.
	* timezone/scheck.c: Likewise.
	* timezone/Makefile (extra-objs): Remove variable.
	($(objpfx)zic): Do not depend on scheck.o and ialloc.o.
	(tz-cflags): Add -DHAVE_GETTEXT -DUSE_LTZ=0
	-Wno-maybe-uninitialized.
	(CFLAGS-zdump.c): Remove -fwrapv -DNOID -DHAVE_GETTEXT.
	(CFLAGS-zic.c): Remove -DNOID -DHAVE_GETTEXT.
	(CFLAGS-ialloc.c): Remove variable.
	(CFLAGS-scheck.c): Likewise.
	* timezone/README: Update list of files from tzcode.
2016-01-07 11:45:07 +00:00

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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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