diff options
Diffstat (limited to 'private.h')
| -rw-r--r-- | private.h | 824 |
1 files changed, 670 insertions, 154 deletions
diff --git a/private.h b/private.h index 008d468ac787..9c31ec5434f2 100644 --- a/private.h +++ b/private.h @@ -1,3 +1,5 @@ +/* Private header for tzdb code. */ + #ifndef PRIVATE_H #define PRIVATE_H @@ -16,201 +18,665 @@ */ /* -** ID +** zdump has been made independent of the rest of the time +** conversion package to increase confidence in the verification it provides. +** You can use zdump to help in verifying other implementations. +** To do this, compile with -DUSE_LTZ=0 and link without the tz library. */ +#ifndef USE_LTZ +# define USE_LTZ 1 +#endif -#ifndef lint -#ifndef NOID -static char privatehid[] = "@(#)private.h 8.6"; -#endif /* !defined NOID */ -#endif /* !defined lint */ - +/* This string was in the Factory zone through version 2016f. */ #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'. +** You can override these in your C compiler options, e.g. '-DHAVE_GETTEXT=1'. */ -#ifndef HAVE_ADJTIME -#define HAVE_ADJTIME 1 -#endif /* !defined HAVE_ADJTIME */ +#ifndef HAVE_DECL_ASCTIME_R +# define HAVE_DECL_ASCTIME_R 1 +#endif + +#if !defined HAVE_GENERIC && defined __has_extension +# if __has_extension(c_generic_selections) +# define HAVE_GENERIC 1 +# else +# define HAVE_GENERIC 0 +# endif +#endif +/* _Generic is buggy in pre-4.9 GCC. */ +#if !defined HAVE_GENERIC && defined __GNUC__ +# define HAVE_GENERIC (4 < __GNUC__ + (9 <= __GNUC_MINOR__)) +#endif +#ifndef HAVE_GENERIC +# define HAVE_GENERIC (201112 <= __STDC_VERSION__) +#endif #ifndef HAVE_GETTEXT -#define HAVE_GETTEXT 0 +# define HAVE_GETTEXT 0 #endif /* !defined HAVE_GETTEXT */ #ifndef HAVE_INCOMPATIBLE_CTIME_R -#define HAVE_INCOMPATIBLE_CTIME_R 0 -#endif /* !defined INCOMPATIBLE_CTIME_R */ +# define HAVE_INCOMPATIBLE_CTIME_R 0 +#endif + +#ifndef HAVE_LINK +# define HAVE_LINK 1 +#endif /* !defined HAVE_LINK */ + +#ifndef HAVE_MALLOC_ERRNO +# define HAVE_MALLOC_ERRNO 1 +#endif + +#ifndef HAVE_POSIX_DECLS +# define HAVE_POSIX_DECLS 1 +#endif + +#ifndef HAVE_STDBOOL_H +# define HAVE_STDBOOL_H (199901 <= __STDC_VERSION__) +#endif -#ifndef HAVE_SETTIMEOFDAY -#define HAVE_SETTIMEOFDAY 3 -#endif /* !defined HAVE_SETTIMEOFDAY */ +#ifndef HAVE_STRDUP +# define HAVE_STRDUP 1 +#endif + +#ifndef HAVE_STRTOLL +# define HAVE_STRTOLL 1 +#endif #ifndef HAVE_SYMLINK -#define HAVE_SYMLINK 1 +# define HAVE_SYMLINK 1 #endif /* !defined HAVE_SYMLINK */ #ifndef HAVE_SYS_STAT_H -#define HAVE_SYS_STAT_H 1 +# 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 +# define HAVE_UNISTD_H 1 #endif /* !defined HAVE_UNISTD_H */ #ifndef HAVE_UTMPX_H -#define HAVE_UTMPX_H 0 +# define HAVE_UTMPX_H 1 #endif /* !defined HAVE_UTMPX_H */ -#ifndef LOCALE_HOME -#define LOCALE_HOME "/usr/lib/locale" -#endif /* !defined LOCALE_HOME */ +#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 +# define asctime_r _incompatible_asctime_r +# define ctime_r _incompatible_ctime_r #endif /* HAVE_INCOMPATIBLE_CTIME_R */ +/* Enable tm_gmtoff, tm_zone, and environ on GNUish systems. */ +#define _GNU_SOURCE 1 +/* Fix asctime_r on Solaris 11. */ +#define _POSIX_PTHREAD_SEMANTICS 1 +/* Enable strtoimax on pre-C99 Solaris 11. */ +#define __EXTENSIONS__ 1 + +/* To avoid having 'stat' fail unnecessarily with errno == EOVERFLOW, + enable large files on GNUish systems ... */ +#ifndef _FILE_OFFSET_BITS +# define _FILE_OFFSET_BITS 64 +#endif +/* ... and on AIX ... */ +#define _LARGE_FILES 1 +/* ... and enable large inode numbers on Mac OS X 10.5 and later. */ +#define _DARWIN_USE_64_BIT_INODE 1 + /* ** 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" +/* Avoid clashes with NetBSD by renaming NetBSD's declarations. + If defining the 'timezone' variable, avoid a clash with FreeBSD's + 'timezone' function by renaming its declaration. */ +#define localtime_rz sys_localtime_rz +#define mktime_z sys_mktime_z +#define posix2time_z sys_posix2time_z +#define time2posix_z sys_time2posix_z +#if defined USG_COMPAT && USG_COMPAT == 2 +# define timezone sys_timezone +#endif +#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 +#if defined USG_COMPAT && USG_COMPAT == 2 +# undef timezone +#endif +#undef timezone_t +#undef tzalloc +#undef tzfree + +#include <sys/types.h> /* for time_t */ +#include <string.h> +#include <limits.h> /* for CHAR_BIT et al. */ +#include <stdlib.h> -#if HAVE_GETTEXT -#include "libintl.h" -#endif /* HAVE_GETTEXT */ +#include <errno.h> -#if HAVE_SYS_WAIT_H -#include <sys/wait.h> /* for WIFEXITED and WEXITSTATUS */ -#endif /* HAVE_SYS_WAIT_H */ +#ifndef EINVAL +# define EINVAL ERANGE +#endif + +#ifndef ELOOP +# define ELOOP EINVAL +#endif +#ifndef ENAMETOOLONG +# define ENAMETOOLONG EINVAL +#endif +#ifndef ENOMEM +# define ENOMEM EINVAL +#endif +#ifndef ENOTSUP +# define ENOTSUP EINVAL +#endif +#ifndef EOVERFLOW +# define EOVERFLOW EINVAL +#endif -#ifndef WIFEXITED -#define WIFEXITED(status) (((status) & 0xff) == 0) -#endif /* !defined WIFEXITED */ -#ifndef WEXITSTATUS -#define WEXITSTATUS(status) (((status) >> 8) & 0xff) -#endif /* !defined WEXITSTATUS */ +#if HAVE_GETTEXT +# include <libintl.h> +#endif /* HAVE_GETTEXT */ #if HAVE_UNISTD_H -#include "unistd.h" /* for F_OK, R_OK, and other POSIX goodness */ +# include <unistd.h> /* for R_OK, and other POSIX goodness */ #endif /* HAVE_UNISTD_H */ -#ifndef F_OK -#define F_OK 0 -#endif /* !defined F_OK */ +#ifndef HAVE_STRFTIME_L +# if _POSIX_VERSION < 200809 +# define HAVE_STRFTIME_L 0 +# else +# define HAVE_STRFTIME_L 1 +# endif +#endif + +#ifndef USG_COMPAT +# ifndef _XOPEN_VERSION +# define USG_COMPAT 0 +# else +# define USG_COMPAT 1 +# endif +#endif + +#ifndef HAVE_TZNAME +# if _POSIX_VERSION < 198808 && !USG_COMPAT +# define HAVE_TZNAME 0 +# else +# define HAVE_TZNAME 1 +# endif +#endif + +#ifndef ALTZONE +# if defined __sun || defined _M_XENIX +# define ALTZONE 1 +# else +# define ALTZONE 0 +# endif +#endif + #ifndef R_OK -#define R_OK 4 +# 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.) +** start, since __GLIBC__ and INTMAX_MAX's values depend on +** previously-included files. glibc 2.1 and Solaris 10 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__))) +# define HAVE_STDINT_H \ + (199901 <= __STDC_VERSION__ \ + || 2 < __GLIBC__ + (1 <= __GLIBC_MINOR__) \ + || __CYGWIN__ || INTMAX_MAX) #endif /* !defined HAVE_STDINT_H */ #if HAVE_STDINT_H -#include "stdint.h" +# include <stdint.h> #endif /* !HAVE_STDINT_H */ -#ifndef INT_FAST64_MAX +#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. */ -#if defined LLONG_MAX || defined __LONG_LONG_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; -#else /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */ -#if (LONG_MAX >> 31) < 0xffffffff +# 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 /* (LONG_MAX >> 31) < 0xffffffff */ +# endif typedef long int_fast64_t; -#endif /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */ -#endif /* !defined INT_FAST64_MAX */ +# define INT_FAST64_MIN LONG_MIN +# define INT_FAST64_MAX LONG_MAX +# endif +#endif + +#ifndef PRIdFAST64 +# if INT_FAST64_MAX == LLONG_MAX +# define PRIdFAST64 "lld" +# else +# define PRIdFAST64 "ld" +# endif +#endif + +#ifndef SCNdFAST64 +# define SCNdFAST64 PRIdFAST64 +#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; +# if HAVE_STRTOLL +# define strtoimax strtoll +# endif +# define INTMAX_MAX LLONG_MAX +# define INTMAX_MIN LLONG_MIN +# else +typedef long intmax_t; +# define INTMAX_MAX LONG_MAX +# define INTMAX_MIN LONG_MIN +# endif +# ifndef strtoimax +# define strtoimax strtol +# endif +#endif + +#ifndef PRIdMAX +# if INTMAX_MAX == LLONG_MAX +# define PRIdMAX "lld" +# else +# define PRIdMAX "ld" +# endif +#endif + +#ifndef UINT_FAST32_MAX +typedef unsigned long uint_fast32_t; +#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 +# define INT32_MAX 0x7fffffff #endif /* !defined INT32_MAX */ #ifndef INT32_MIN -#define INT32_MIN (-1 - INT32_MAX) +# define INT32_MIN (-1 - INT32_MAX) #endif /* !defined INT32_MIN */ +#ifndef SIZE_MAX +# define SIZE_MAX ((size_t) -1) +#endif + +#if 3 <= __GNUC__ +# define ATTRIBUTE_CONST __attribute__((const)) +# define ATTRIBUTE_MALLOC __attribute__((__malloc__)) +# define ATTRIBUTE_PURE __attribute__((__pure__)) +# define ATTRIBUTE_FORMAT(spec) __attribute__((__format__ spec)) +#else +# define ATTRIBUTE_CONST /* empty */ +# define ATTRIBUTE_MALLOC /* 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 EPOCH_LOCAL +# define EPOCH_LOCAL 0 +#endif +#ifndef EPOCH_OFFSET +# define EPOCH_OFFSET 0 +#endif +#ifndef RESERVE_STD_EXT_IDS +# define RESERVE_STD_EXT_IDS 0 +#endif -#ifndef asctime_r -extern char * asctime_r(struct tm const *, char *); +/* If standard C identifiers with external linkage (e.g., localtime) + are reserved and are not already being renamed anyway, rename them + as if compiling with '-Dtime_tz=time_t'. */ +#if !defined time_tz && RESERVE_STD_EXT_IDS && USE_LTZ +# define time_tz time_t #endif /* -** Private function declarations. +** 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. */ +#if defined time_tz || EPOCH_LOCAL || EPOCH_OFFSET != 0 +# define TZ_TIME_T 1 +#else +# define TZ_TIME_T 0 +#endif -char * icalloc(int nelem, int elsize); -char * icatalloc(char * old, const char * new); -char * icpyalloc(const char * string); -char * imalloc(int n); -void * irealloc(void * pointer, int size); -void icfree(char * pointer); -void ifree(char * pointer); -const char * scheck(const char * string, const char * format); +#if defined LOCALTIME_IMPLEMENTATION && TZ_TIME_T +static time_t sys_time(time_t *x) { return time(x); } +#endif + +#if TZ_TIME_T + +typedef time_tz tz_time_t; + +# undef asctime +# define asctime tz_asctime +# undef asctime_r +# define asctime_r tz_asctime_r +# 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 strftime +# define strftime tz_strftime +# 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 +# if HAVE_STRFTIME_L +# undef strftime_l +# define strftime_l tz_strftime_l +# endif +# if HAVE_TZNAME +# undef tzname +# define tzname tz_tzname +# endif +# if USG_COMPAT +# undef daylight +# define daylight tz_daylight +# undef timezone +# define timezone tz_timezone +# endif +# if ALTZONE +# undef altzone +# define altzone tz_altzone +# endif + +char *asctime(struct tm const *); +char *asctime_r(struct tm const *restrict, char *restrict); +char *ctime(time_t const *); +char *ctime_r(time_t const *, char *); +double difftime(time_t, time_t) ATTRIBUTE_CONST; +size_t strftime(char *restrict, size_t, char const *restrict, + struct tm const *restrict); +# if HAVE_STRFTIME_L +size_t strftime_l(char *restrict, size_t, char const *restrict, + struct tm const *restrict, locale_t); +# endif +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 + +#if !HAVE_DECL_ASCTIME_R && !defined asctime_r +extern char *asctime_r(struct tm const *restrict, char *restrict); +#endif + +#ifndef HAVE_DECL_ENVIRON +# if defined environ || defined __USE_GNU +# define HAVE_DECL_ENVIRON 1 +# else +# define HAVE_DECL_ENVIRON 0 +# endif +#endif + +#if !HAVE_DECL_ENVIRON +extern char **environ; +#endif + +#if 2 <= HAVE_TZNAME + (TZ_TIME_T || !HAVE_POSIX_DECLS) +extern char *tzname[]; +#endif +#if 2 <= USG_COMPAT + (TZ_TIME_T || !HAVE_POSIX_DECLS) +extern long timezone; +extern int daylight; +#endif +#if 2 <= ALTZONE + (TZ_TIME_T || !HAVE_POSIX_DECLS) +extern long altzone; +#endif /* -** Finally, some convenience items. +** The STD_INSPIRED functions are similar, but most also need +** declarations if time_tz is defined. */ -#ifndef TRUE -#define TRUE 1 -#endif /* !defined TRUE */ - -#ifndef FALSE -#define FALSE 0 -#endif /* !defined FALSE */ +#ifdef STD_INSPIRED +# if TZ_TIME_T || !defined offtime +struct tm *offtime(time_t const *, long); +# endif +# if TZ_TIME_T || !defined timegm +time_t timegm(struct tm *); +# endif +# if TZ_TIME_T || !defined timelocal +time_t timelocal(struct tm *); +# endif +# if TZ_TIME_T || !defined timeoff +time_t timeoff(struct tm *, long); +# endif +# if TZ_TIME_T || !defined time2posix +time_t time2posix(time_t); +# endif +# if TZ_TIME_T || !defined posix2time +time_t posix2time(time_t); +# endif +#endif -#ifndef TYPE_BIT -#define TYPE_BIT(type) (sizeof (type) * CHAR_BIT) -#endif /* !defined TYPE_BIT */ +/* 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 -#ifndef TYPE_SIGNED -#define TYPE_SIGNED(type) (((type) -1) < 0) -#endif /* !defined TYPE_SIGNED */ +/* +** 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 TZ_TIME_T || !defined posix2time_z +time_t posix2time_z(timezone_t, time_t) ATTRIBUTE_PURE; +# endif +# if TZ_TIME_T || !defined time2posix_z +time_t time2posix_z(timezone_t, time_t) ATTRIBUTE_PURE; +# endif +# endif +#endif /* -** Since the definition of TYPE_INTEGRAL contains floating point numbers, -** it cannot be used in preprocessor directives. +** Finally, some convenience items. */ -#ifndef TYPE_INTEGRAL -#define TYPE_INTEGRAL(type) (((type) 0.5) != 0.5) -#endif /* !defined TYPE_INTEGRAL */ +#if HAVE_STDBOOL_H +# include <stdbool.h> +#else +# define true 1 +# define false 0 +# define bool int +#endif + +#define TYPE_BIT(type) (sizeof(type) * CHAR_BIT) +#define TYPE_SIGNED(type) (((type) -1) < 0) +#define TWOS_COMPLEMENT(t) ((t) ~ (t) 0 < 0) + +/* Minimum and maximum of two values. Use lower case to avoid + naming clashes with standard include files. */ +#define max(a, b) ((a) > (b) ? (a) : (b)) +#define min(a, b) ((a) < (b) ? (a) : (b)) + +/* 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 extreme time values, assuming no padding. */ +#define TIME_T_MIN_NO_PADDING MINVAL(time_t, TYPE_BIT(time_t)) +#define TIME_T_MAX_NO_PADDING MAXVAL(time_t, TYPE_BIT(time_t)) + +/* The extreme time values. These are macros, not constants, so that + any portability problems occur only when compiling .c files that use + the macros, which is safer for applications that need only zdump and zic. + This implementation assumes no padding if time_t is signed and + either the compiler lacks support for _Generic or time_t is not one + of the standard signed integer types. */ +#if HAVE_GENERIC +# define TIME_T_MIN \ + _Generic((time_t) 0, \ + signed char: SCHAR_MIN, short: SHRT_MIN, \ + int: INT_MIN, long: LONG_MIN, long long: LLONG_MIN, \ + default: TIME_T_MIN_NO_PADDING) +# define TIME_T_MAX \ + (TYPE_SIGNED(time_t) \ + ? _Generic((time_t) 0, \ + signed char: SCHAR_MAX, short: SHRT_MAX, \ + int: INT_MAX, long: LONG_MAX, long long: LLONG_MAX, \ + default: TIME_T_MAX_NO_PADDING) \ + : (time_t) -1) +#else +# define TIME_T_MIN TIME_T_MIN_NO_PADDING +# define TIME_T_MAX TIME_T_MAX_NO_PADDING +#endif -#ifndef INT_STRLEN_MAXIMUM /* ** 302 / 1000 is log10(2.0) rounded up. ** Subtract one for the sign bit if the type is signed; @@ -220,49 +686,55 @@ const char * scheck(const char * string, const char * format); #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 */ +#ifdef GCC_LINT +# define INITIALIZE(x) ((x) = 0) +#else +# define INITIALIZE(x) +#endif + +/* Whether memory access must strictly follow the C standard. + If 0, it's OK to read uninitialized storage so long as the value is + not relied upon. Defining it to 0 lets mktime access parts of + struct tm that might be uninitialized, as a heuristic when the + standard doesn't say what to return and when tm_gmtoff can help + mktime likely infer a better value. */ +#ifndef UNINIT_TRAP +# define UNINIT_TRAP 0 +#endif + +#ifdef DEBUG +# define UNREACHABLE() abort() +#elif 4 < __GNUC__ + (5 <= __GNUC_MINOR__) +# define UNREACHABLE() __builtin_unreachable() +#elif defined __has_builtin +# if __has_builtin(__builtin_unreachable) +# define UNREACHABLE() __builtin_unreachable() +# endif +#endif +#ifndef UNREACHABLE +# define UNREACHABLE() ((void) 0) +#endif /* ** For the benefit of GNU folk... -** `_(MSGID)' uses the current locale's message library string for MSGID. +** '_(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 !defined TZ_DOMAIN && defined HAVE_GETTEXT +# define TZ_DOMAIN "tz" +#endif #if HAVE_INCOMPATIBLE_CTIME_R #undef asctime_r @@ -271,28 +743,72 @@ 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 */ +/* Handy macros that are independent of tzfile implementation. */ + +enum { + SECSPERMIN = 60, + MINSPERHOUR = 60, + SECSPERHOUR = SECSPERMIN * MINSPERHOUR, + HOURSPERDAY = 24, + DAYSPERWEEK = 7, + DAYSPERNYEAR = 365, + DAYSPERLYEAR = DAYSPERNYEAR + 1, + MONSPERYEAR = 12, + YEARSPERREPEAT = 400 /* years before a Gregorian repeat */ +}; + +#define SECSPERDAY ((int_fast32_t) SECSPERHOUR * HOURSPERDAY) + +#define DAYSPERREPEAT ((int_fast32_t) 400 * 365 + 100 - 4 + 1) +#define SECSPERREPEAT ((int_fast64_t) DAYSPERREPEAT * SECSPERDAY) +#define AVGSECSPERYEAR (SECSPERREPEAT / YEARSPERREPEAT) + +enum { + TM_SUNDAY, + TM_MONDAY, + TM_TUESDAY, + TM_WEDNESDAY, + TM_THURSDAY, + TM_FRIDAY, + TM_SATURDAY +}; + +enum { + TM_JANUARY, + TM_FEBRUARY, + TM_MARCH, + TM_APRIL, + TM_MAY, + TM_JUNE, + TM_JULY, + TM_AUGUST, + TM_SEPTEMBER, + TM_OCTOBER, + TM_NOVEMBER, + TM_DECEMBER +}; + +enum { + TM_YEAR_BASE = 1900, + TM_WDAY_BASE = TM_MONDAY, + EPOCH_YEAR = 1970, + EPOCH_WDAY = TM_THURSDAY +}; + +#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0)) /* -** The Gregorian year averages 365.2425 days, which is 31556952 seconds. +** Since everything in isleap is modulo 400 (or a factor of 400), we know that +** isleap(y) == isleap(y % 400) +** and so +** isleap(a + b) == isleap((a + b) % 400) +** or +** isleap(a + b) == isleap(a % 400 + b % 400) +** This is true even if % means modulo rather than Fortran remainder +** (which is allowed by C89 but not by C99 or later). +** We use this to avoid addition overflow problems. */ -#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. -*/ +#define isleap_sum(a, b) isleap((a) % 400 + (b) % 400) #endif /* !defined PRIVATE_H */ |