[apple/icu.git] / icuSources / tools / tzcode / private.h

#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_ADJTIME=0'.
*/

#ifndef HAVE_ADJTIME
#define HAVE_ADJTIME		1
#endif /* !defined HAVE_ADJTIME */

#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_SETTIMEOFDAY
#define HAVE_SETTIMEOFDAY	3
#endif /* !defined HAVE_SETTIMEOFDAY */

#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		0
#endif /* !defined HAVE_UTMPX_H */

#ifndef LOCALE_HOME
#define LOCALE_HOME		"/usr/lib/locale"
#endif /* !defined LOCALE_HOME */

#if HAVE_INCOMPATIBLE_CTIME_R
#define asctime_r _incompatible_asctime_r
#define ctime_r _incompatible_ctime_r
#endif /* HAVE_INCOMPATIBLE_CTIME_R */

/*
** Nested includes
*/

#include "sys/types.h"	/* for time_t */
#include "stdio.h"
#include "errno.h"
#include "string.h"
#include "limits.h"	/* for CHAR_BIT et al. */
#include "time.h"
#include "stdlib.h"

#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 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__ + (0 < __GLIBC_MINOR__)))
#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

#ifndef INT_FAST64_MAX
/* Pre-C99 GCC compilers define __LONG_LONG_MAX__ instead of LLONG_MAX.  */
#if defined LLONG_MAX || defined __LONG_LONG_MAX__
typedef long long	int_fast64_t;
# ifdef LLONG_MAX
#  define INT_FAST64_MIN LLONG_MIN
#  define INT_FAST64_MAX LLONG_MAX
# else
#  define INT_FAST64_MIN __LONG_LONG_MIN__
#  define INT_FAST64_MAX __LONG_LONG_MAX__
# endif
# define SCNdFAST64 "lld"
#else /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
#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 /* (LONG_MAX >> 31) < 0xffffffff */
typedef long		int_fast64_t;
# define INT_FAST64_MIN LONG_MIN
# define INT_FAST64_MAX LONG_MAX
# define SCNdFAST64 "ld"
#endif /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
#endif /* !defined INT_FAST64_MAX */

#ifndef INT_FAST32_MAX
# if INT_MAX >> 31 == 0
typedef long int_fast32_t;
# else
typedef int int_fast32_t;
# endif
#endif

#ifndef INTMAX_MAX
# if defined LLONG_MAX || defined __LONG_LONG_MAX__
typedef long long intmax_t;
#  define strtoimax strtoll
#  define PRIdMAX "lld"
#  ifdef LLONG_MAX
#   define INTMAX_MAX LLONG_MAX
#   define INTMAX_MIN LLONG_MIN
#  else
#   define INTMAX_MAX __LONG_LONG_MAX__
#   define INTMAX_MIN __LONG_LONG_MIN__
#  endif
# else
typedef long intmax_t;
#  define strtoimax strtol
#  define PRIdMAX "ld"
#  define INTMAX_MAX LONG_MAX
#  define INTMAX_MIN LONG_MIN
# endif
#endif

#ifndef UINTMAX_MAX
# if defined ULLONG_MAX || defined __LONG_LONG_MAX__
typedef unsigned long long uintmax_t;
#  define PRIuMAX "llu"
# else
typedef unsigned long uintmax_t;
#  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.
*/

/*
** Some time.h implementations don't declare asctime_r.
** Others might define it as a macro.
** Fix the former without affecting the latter.
*/

#ifndef asctime_r
extern char *	asctime_r(struct tm const *, char *);
#endif

/*
** 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
static time_t sys_time(time_t *x) { return time(x); }

# 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  mktime
# define mktime tz_mktime
# undef  time
# define time tz_time
# undef  time_t
# define time_t tz_time_t

typedef time_tz time_t;

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 *);

static time_t
time(time_t *p)
{
	time_t r = sys_time(0);
	if (p)
		*p = r;
	return r;
}
#endif

/*
** Private function declarations.
*/

char *		icatalloc(char * old, const char * new);
char *		icpyalloc(const char * string);
const char *	scheck(const char * string, const char * format);

/*
** Finally, some convenience items.
*/

#ifndef TRUE
#define TRUE	1
#endif /* !defined TRUE */

#ifndef FALSE
#define FALSE	0
#endif /* !defined FALSE */

#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 */

/* The minimum and maximum finite time values.  */
static time_t const time_t_min =
  (TYPE_SIGNED(time_t)
   ? (time_t) -1 << (CHAR_BIT * sizeof (time_t) - 1)
   : 0);
static time_t const time_t_max =
  (TYPE_SIGNED(time_t)
   ? - (~ 0 < 0) - ((time_t) -1 << (CHAR_BIT * sizeof (time_t) - 1))
   : -1);

#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)
*/

#ifndef GNUC_or_lint
#ifdef lint
#define GNUC_or_lint
#endif /* defined lint */
#ifndef lint
#ifdef __GNUC__
#define GNUC_or_lint
#endif /* defined __GNUC__ */
#endif /* !defined lint */
#endif /* !defined GNUC_or_lint */

#ifndef INITIALIZE
#ifdef GNUC_or_lint
#define INITIALIZE(x)	((x) = 0)
#endif /* defined GNUC_or_lint */
#ifndef GNUC_or_lint
#define INITIALIZE(x)
#endif /* !defined GNUC_or_lint */
#endif /* !defined INITIALIZE */

/*
** 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 _ */

#ifndef TZ_DOMAIN
#define TZ_DOMAIN "tz"
#endif /* !defined TZ_DOMAIN */

#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 */

/*
** UNIX was a registered trademark of The Open Group in 2003.
*/

#endif /* !defined PRIVATE_H */
Commit	Line	Data
73c04bcf A	1	#ifndef PRIVATE_H
	2
	3	#define PRIVATE_H
	4
	5	/*
	6	** This file is in the public domain, so clarified as of
	7	** 1996-06-05 by Arthur David Olson.
	8	*/
	9
	10	/*
	11	** This header is for use ONLY with the time conversion code.
	12	** There is no guarantee that it will remain unchanged,
	13	** or that it will remain at all.
	14	** Do NOT copy it to any system include directory.
	15	** Thank you!
	16	*/
	17
73c04bcf A	18	#define GRANDPARENTED "Local time zone must be set--see zic manual page"
	19
	20	/*
	21	** Defaults for preprocessor symbols.
	22	** You can override these in your C compiler options, e.g. `-DHAVE_ADJTIME=0'.
	23	*/
	24
	25	#ifndef HAVE_ADJTIME
	26	#define HAVE_ADJTIME 1
	27	#endif /* !defined HAVE_ADJTIME */
	28
	29	#ifndef HAVE_GETTEXT
	30	#define HAVE_GETTEXT 0
	31	#endif /* !defined HAVE_GETTEXT */
	32
	33	#ifndef HAVE_INCOMPATIBLE_CTIME_R
	34	#define HAVE_INCOMPATIBLE_CTIME_R 0
	35	#endif /* !defined INCOMPATIBLE_CTIME_R */
	36
b331163b A	37	#ifndef HAVE_LINK
	38	#define HAVE_LINK 1
	39	#endif /* !defined HAVE_LINK */
	40
73c04bcf A	41	#ifndef HAVE_SETTIMEOFDAY
	42	#define HAVE_SETTIMEOFDAY 3
	43	#endif /* !defined HAVE_SETTIMEOFDAY */
	44
73c04bcf A	45	#ifndef HAVE_SYMLINK
	46	#define HAVE_SYMLINK 1
	47	#endif /* !defined HAVE_SYMLINK */
	48
	49	#ifndef HAVE_SYS_STAT_H
	50	#define HAVE_SYS_STAT_H 1
	51	#endif /* !defined HAVE_SYS_STAT_H */
	52
	53	#ifndef HAVE_SYS_WAIT_H
	54	#define HAVE_SYS_WAIT_H 1
	55	#endif /* !defined HAVE_SYS_WAIT_H */
	56
	57	#ifndef HAVE_UNISTD_H
	58	#define HAVE_UNISTD_H 1
	59	#endif /* !defined HAVE_UNISTD_H */
	60
	61	#ifndef HAVE_UTMPX_H
	62	#define HAVE_UTMPX_H 0
	63	#endif /* !defined HAVE_UTMPX_H */
	64
	65	#ifndef LOCALE_HOME
	66	#define LOCALE_HOME "/usr/lib/locale"
	67	#endif /* !defined LOCALE_HOME */
	68
	69	#if HAVE_INCOMPATIBLE_CTIME_R
	70	#define asctime_r _incompatible_asctime_r
	71	#define ctime_r _incompatible_ctime_r
	72	#endif /* HAVE_INCOMPATIBLE_CTIME_R */
	73
	74	/*
	75	** Nested includes
	76	*/
	77
	78	#include "sys/types.h" /* for time_t */
	79	#include "stdio.h"
	80	#include "errno.h"
	81	#include "string.h"
	82	#include "limits.h" /* for CHAR_BIT et al. */
	83	#include "time.h"
	84	#include "stdlib.h"
	85
	86	#if HAVE_GETTEXT
	87	#include "libintl.h"
	88	#endif /* HAVE_GETTEXT */
	89
	90	#if HAVE_SYS_WAIT_H
	91	#include <sys/wait.h> /* for WIFEXITED and WEXITSTATUS */
	92	#endif /* HAVE_SYS_WAIT_H */
	93
	94	#ifndef WIFEXITED
	95	#define WIFEXITED(status) (((status) & 0xff) == 0)
	96	#endif /* !defined WIFEXITED */
	97	#ifndef WEXITSTATUS
	98	#define WEXITSTATUS(status) (((status) >> 8) & 0xff)
	99	#endif /* !defined WEXITSTATUS */
	100
	101	#if HAVE_UNISTD_H
fd0068a8	102	#include "unistd.h" /* for F_OK, R_OK, and other POSIX goodness */
73c04bcf A	103	#endif /* HAVE_UNISTD_H */
73c04bcf A	104
73c04bcf A	105	#ifndef F_OK
	106	#define F_OK 0
	107	#endif /* !defined F_OK */
	108	#ifndef R_OK
	109	#define R_OK 4
	110	#endif /* !defined R_OK */
73c04bcf A	111
	112	/* Unlike <ctype.h>'s isdigit, this also works if c < 0 \| c > UCHAR_MAX. */
	113	#define is_digit(c) ((unsigned)(c) - '0' <= 9)
	114
	115	/*
	116	** Define HAVE_STDINT_H's default value here, rather than at the
	117	** start, since __GLIBC__'s value depends on previously-included
	118	** files.
	119	** (glibc 2.1 and later have stdint.h, even with pre-C99 compilers.)
	120	*/
	121	#ifndef HAVE_STDINT_H
	122	#define HAVE_STDINT_H \
	123	(199901 <= __STDC_VERSION__ \|\| \
	124	2 < (__GLIBC__ + (0 < __GLIBC_MINOR__)))
	125	#endif /* !defined HAVE_STDINT_H */
	126
	127	#if HAVE_STDINT_H
	128	#include "stdint.h"
	129	#endif /* !HAVE_STDINT_H */
	130
b331163b A	131	#ifndef HAVE_INTTYPES_H
	132	# define HAVE_INTTYPES_H HAVE_STDINT_H
	133	#endif
	134	#if HAVE_INTTYPES_H
	135	# include <inttypes.h>
	136	#endif
	137
73c04bcf A	138	#ifndef INT_FAST64_MAX
	139	/* Pre-C99 GCC compilers define __LONG_LONG_MAX__ instead of LLONG_MAX. */
	140	#if defined LLONG_MAX \|\| defined __LONG_LONG_MAX__
	141	typedef long long int_fast64_t;
b331163b A	142	# ifdef LLONG_MAX
	143	# define INT_FAST64_MIN LLONG_MIN
	144	# define INT_FAST64_MAX LLONG_MAX
	145	# else
	146	# define INT_FAST64_MIN __LONG_LONG_MIN__
	147	# define INT_FAST64_MAX __LONG_LONG_MAX__
	148	# endif
	149	# define SCNdFAST64 "lld"
73c04bcf A	150	#else /* ! (defined LLONG_MAX \|\| defined __LONG_LONG_MAX__) */
	151	#if (LONG_MAX >> 31) < 0xffffffff
	152	Please use a compiler that supports a 64-bit integer type (or wider);
	153	you may need to compile with "-DHAVE_STDINT_H".
	154	#endif /* (LONG_MAX >> 31) < 0xffffffff */
	155	typedef long int_fast64_t;
b331163b A	156	# define INT_FAST64_MIN LONG_MIN
	157	# define INT_FAST64_MAX LONG_MAX
	158	# define SCNdFAST64 "ld"
73c04bcf A	159	#endif /* ! (defined LLONG_MAX \|\| defined __LONG_LONG_MAX__) */
	160	#endif /* !defined INT_FAST64_MAX */
	161
b331163b A	162	#ifndef INT_FAST32_MAX
	163	# if INT_MAX >> 31 == 0
	164	typedef long int_fast32_t;
	165	# else
	166	typedef int int_fast32_t;
	167	# endif
	168	#endif
	169
	170	#ifndef INTMAX_MAX
	171	# if defined LLONG_MAX \|\| defined __LONG_LONG_MAX__
	172	typedef long long intmax_t;
	173	# define strtoimax strtoll
	174	# define PRIdMAX "lld"
	175	# ifdef LLONG_MAX
	176	# define INTMAX_MAX LLONG_MAX
	177	# define INTMAX_MIN LLONG_MIN
	178	# else
	179	# define INTMAX_MAX __LONG_LONG_MAX__
	180	# define INTMAX_MIN __LONG_LONG_MIN__
	181	# endif
	182	# else
	183	typedef long intmax_t;
	184	# define strtoimax strtol
	185	# define PRIdMAX "ld"
	186	# define INTMAX_MAX LONG_MAX
	187	# define INTMAX_MIN LONG_MIN
	188	# endif
	189	#endif
	190
	191	#ifndef UINTMAX_MAX
	192	# if defined ULLONG_MAX \|\| defined __LONG_LONG_MAX__
	193	typedef unsigned long long uintmax_t;
	194	# define PRIuMAX "llu"
	195	# else
	196	typedef unsigned long uintmax_t;
	197	# define PRIuMAX "lu"
	198	# endif
	199	#endif
	200
73c04bcf A	201	#ifndef INT32_MAX
	202	#define INT32_MAX 0x7fffffff
	203	#endif /* !defined INT32_MAX */
	204	#ifndef INT32_MIN
	205	#define INT32_MIN (-1 - INT32_MAX)
	206	#endif /* !defined INT32_MIN */
	207
b331163b A	208	#ifndef SIZE_MAX
	209	#define SIZE_MAX ((size_t) -1)
	210	#endif
	211
	212	#if 2 < __GNUC__ + (96 <= __GNUC_MINOR__)
	213	# define ATTRIBUTE_CONST __attribute__ ((const))
	214	# define ATTRIBUTE_PURE __attribute__ ((__pure__))
	215	# define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
	216	#else
	217	# define ATTRIBUTE_CONST /* empty */
	218	# define ATTRIBUTE_PURE /* empty */
	219	# define ATTRIBUTE_FORMAT(spec) /* empty */
	220	#endif
	221
	222	#if !defined _Noreturn && __STDC_VERSION__ < 201112
	223	# if 2 < __GNUC__ + (8 <= __GNUC_MINOR__)
	224	# define _Noreturn __attribute__ ((__noreturn__))
	225	# else
	226	# define _Noreturn
	227	# endif
	228	#endif
	229
	230	#if __STDC_VERSION__ < 199901 && !defined restrict
	231	# define restrict /* empty */
	232	#endif
	233
73c04bcf A	234	/*
	235	** Workarounds for compilers/systems.
	236	*/
	237
73c04bcf A	238	/*
	239	** Some time.h implementations don't declare asctime_r.
	240	** Others might define it as a macro.
	241	** Fix the former without affecting the latter.
	242	*/
	243
	244	#ifndef asctime_r
fd0068a8	245	extern char * asctime_r(struct tm const , char );
73c04bcf A	246	#endif
73c04bcf A	247
b331163b A	248	/*
	249	** Compile with -Dtime_tz=T to build the tz package with a private
	250	** time_t type equivalent to T rather than the system-supplied time_t.
	251	** This debugging feature can test unusual design decisions
	252	** (e.g., time_t wider than 'long', or unsigned time_t) even on
	253	** typical platforms.
	254	*/
	255	#ifdef time_tz
	256	static time_t sys_time(time_t *x) { return time(x); }
	257
	258	# undef ctime
	259	# define ctime tz_ctime
	260	# undef ctime_r
	261	# define ctime_r tz_ctime_r
	262	# undef difftime
	263	# define difftime tz_difftime
	264	# undef gmtime
	265	# define gmtime tz_gmtime
	266	# undef gmtime_r
	267	# define gmtime_r tz_gmtime_r
	268	# undef localtime
	269	# define localtime tz_localtime
	270	# undef localtime_r
	271	# define localtime_r tz_localtime_r
	272	# undef mktime
	273	# define mktime tz_mktime
	274	# undef time
	275	# define time tz_time
	276	# undef time_t
	277	# define time_t tz_time_t
	278
	279	typedef time_tz time_t;
	280
	281	char ctime(time_t const );
	282	char ctime_r(time_t const , char *);
	283	double difftime(time_t, time_t);
	284	struct tm gmtime(time_t const );
	285	struct tm gmtime_r(time_t const restrict, struct tm *restrict);
	286	struct tm localtime(time_t const );
	287	struct tm localtime_r(time_t const restrict, struct tm *restrict);
	288	time_t mktime(struct tm *);
	289
	290	static time_t
	291	time(time_t *p)
	292	{
	293	time_t r = sys_time(0);
	294	if (p)
	295	*p = r;
	296	return r;
	297	}
	298	#endif
	299
73c04bcf A	300	/*
	301	** Private function declarations.
	302	*/
	303
fd0068a8 A	304	char * icatalloc(char * old, const char * new);
fd0068a8 A	305	char * icpyalloc(const char * string);
fd0068a8	306	const char * scheck(const char * string, const char * format);
73c04bcf A	307
	308	/*
	309	** Finally, some convenience items.
	310	*/
	311
	312	#ifndef TRUE
	313	#define TRUE 1
	314	#endif /* !defined TRUE */
	315
	316	#ifndef FALSE
	317	#define FALSE 0
	318	#endif /* !defined FALSE */
	319
	320	#ifndef TYPE_BIT
	321	#define TYPE_BIT(type) (sizeof (type) * CHAR_BIT)
	322	#endif /* !defined TYPE_BIT */
	323
	324	#ifndef TYPE_SIGNED
	325	#define TYPE_SIGNED(type) (((type) -1) < 0)
	326	#endif /* !defined TYPE_SIGNED */
	327
b331163b A	328	/* The minimum and maximum finite time values. */
	329	static time_t const time_t_min =
	330	(TYPE_SIGNED(time_t)
	331	? (time_t) -1 << (CHAR_BIT * sizeof (time_t) - 1)
	332	: 0);
	333	static time_t const time_t_max =
	334	(TYPE_SIGNED(time_t)
	335	? - (~ 0 < 0) - ((time_t) -1 << (CHAR_BIT * sizeof (time_t) - 1))
	336	: -1);
73c04bcf A	337
	338	#ifndef INT_STRLEN_MAXIMUM
	339	/*
	340	** 302 / 1000 is log10(2.0) rounded up.
	341	** Subtract one for the sign bit if the type is signed;
	342	** add one for integer division truncation;
	343	** add one more for a minus sign if the type is signed.
	344	*/
	345	#define INT_STRLEN_MAXIMUM(type) \
	346	((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + \
	347	1 + TYPE_SIGNED(type))
	348	#endif /* !defined INT_STRLEN_MAXIMUM */
	349
	350	/*
	351	** INITIALIZE(x)
	352	*/
	353
	354	#ifndef GNUC_or_lint
	355	#ifdef lint
	356	#define GNUC_or_lint
	357	#endif /* defined lint */
	358	#ifndef lint
	359	#ifdef __GNUC__
	360	#define GNUC_or_lint
	361	#endif /* defined __GNUC__ */
	362	#endif /* !defined lint */
	363	#endif /* !defined GNUC_or_lint */
	364
	365	#ifndef INITIALIZE
	366	#ifdef GNUC_or_lint
	367	#define INITIALIZE(x) ((x) = 0)
	368	#endif /* defined GNUC_or_lint */
	369	#ifndef GNUC_or_lint
	370	#define INITIALIZE(x)
	371	#endif /* !defined GNUC_or_lint */
	372	#endif /* !defined INITIALIZE */
	373
	374	/*
	375	** For the benefit of GNU folk...
	376	** `_(MSGID)' uses the current locale's message library string for MSGID.
	377	** The default is to use gettext if available, and use MSGID otherwise.
	378	*/
	379
	380	#ifndef _
	381	#if HAVE_GETTEXT
	382	#define _(msgid) gettext(msgid)
	383	#else /* !HAVE_GETTEXT */
	384	#define _(msgid) msgid
	385	#endif /* !HAVE_GETTEXT */
	386	#endif /* !defined _ */
	387
	388	#ifndef TZ_DOMAIN
	389	#define TZ_DOMAIN "tz"
	390	#endif /* !defined TZ_DOMAIN */
	391
	392	#if HAVE_INCOMPATIBLE_CTIME_R
	393	#undef asctime_r
	394	#undef ctime_r
fd0068a8 A	395	char asctime_r(struct tm const , char *);
fd0068a8 A	396	char ctime_r(time_t const , char *);
73c04bcf A	397	#endif /* HAVE_INCOMPATIBLE_CTIME_R */
	398
	399	#ifndef YEARSPERREPEAT
	400	#define YEARSPERREPEAT 400 /* years before a Gregorian repeat */
	401	#endif /* !defined YEARSPERREPEAT */
	402
	403	/*
	404	** The Gregorian year averages 365.2425 days, which is 31556952 seconds.
	405	*/
	406
	407	#ifndef AVGSECSPERYEAR
	408	#define AVGSECSPERYEAR 31556952L
	409	#endif /* !defined AVGSECSPERYEAR */
	410
	411	#ifndef SECSPERREPEAT
	412	#define SECSPERREPEAT ((int_fast64_t) YEARSPERREPEAT * (int_fast64_t) AVGSECSPERYEAR)
	413	#endif /* !defined SECSPERREPEAT */
fd0068a8	414
73c04bcf A	415	#ifndef SECSPERREPEAT_BITS
	416	#define SECSPERREPEAT_BITS 34 /* ceil(log2(SECSPERREPEAT)) */
	417	#endif /* !defined SECSPERREPEAT_BITS */
	418
	419	/*
	420	** UNIX was a registered trademark of The Open Group in 2003.
	421	*/
	422
	423	#endif /* !defined PRIVATE_H */