amiga-tz/utility/private.h

#ifndef TZ_PRIVATE_H
#define TZ_PRIVATE_H

#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_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		0
#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

#ifndef __LONG_LONG_MAX__
#define __LONG_LONG_MAX__  0x7fffffffffffffffLL
#endif

#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 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

/* 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

/*
** 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)
*/

#if defined(lint) || defined(INITCLEAN)
# 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

#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 TZ_PRIVATE_H */