diff options
Diffstat (limited to 'timezone/private.h')
| -rw-r--r-- | timezone/private.h | 236 |
1 files changed, 173 insertions, 63 deletions
diff --git a/timezone/private.h b/timezone/private.h index e2f23f5f40..1ead14793b 100644 --- a/timezone/private.h +++ b/timezone/private.h @@ -1,3 +1,5 @@ +/* Private header for tzdb code. */ + #ifndef PRIVATE_H #define PRIVATE_H @@ -15,6 +17,16 @@ ** Thank you! */ +/* +** 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 + /* This string was in the Factory zone through version 2016f. */ #define GRANDPARENTED "Local time zone must be set--see zic manual page" @@ -27,13 +39,28 @@ #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 #endif /* !defined HAVE_GETTEXT */ #ifndef HAVE_INCOMPATIBLE_CTIME_R #define HAVE_INCOMPATIBLE_CTIME_R 0 -#endif /* !defined INCOMPATIBLE_CTIME_R */ +#endif #ifndef HAVE_LINK #define HAVE_LINK 1 @@ -43,10 +70,18 @@ #define HAVE_POSIX_DECLS 1 #endif +#ifndef HAVE_STDBOOL_H +#define HAVE_STDBOOL_H (199901 <= __STDC_VERSION__) +#endif + #ifndef HAVE_STRDUP #define HAVE_STRDUP 1 #endif +#ifndef HAVE_STRTOLL +#define HAVE_STRTOLL 1 +#endif + #ifndef HAVE_SYMLINK #define HAVE_SYMLINK 1 #endif /* !defined HAVE_SYMLINK */ @@ -76,13 +111,23 @@ #define ctime_r _incompatible_ctime_r #endif /* HAVE_INCOMPATIBLE_CTIME_R */ -/* Enable tm_gmtoff and tm_zone on GNUish systems. */ +/* 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 */ @@ -105,7 +150,6 @@ #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> @@ -126,19 +170,8 @@ #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 */ +#include <unistd.h> /* for R_OK, and other POSIX goodness */ #endif /* HAVE_UNISTD_H */ #ifndef HAVE_STRFTIME_L @@ -149,9 +182,22 @@ # endif #endif -#ifndef F_OK -#define F_OK 0 -#endif /* !defined F_OK */ +#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 R_OK #define R_OK 4 #endif /* !defined R_OK */ @@ -236,15 +282,19 @@ typedef int int_fast32_t; #ifndef INTMAX_MAX # ifdef LLONG_MAX typedef long long intmax_t; -# define strtoimax strtoll +# if HAVE_STRTOLL +# define strtoimax strtoll +# endif # 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 +# ifndef strtoimax +# define strtoimax strtol +# endif #endif #ifndef PRIdMAX @@ -294,12 +344,14 @@ typedef unsigned long uintmax_t; #define SIZE_MAX ((size_t) -1) #endif -#if 2 < __GNUC__ + (96 <= __GNUC_MINOR__) +#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 @@ -326,6 +378,16 @@ typedef unsigned long uintmax_t; #ifndef EPOCH_OFFSET # define EPOCH_OFFSET 0 #endif +#ifndef RESERVE_STD_EXT_IDS +# define RESERVE_STD_EXT_IDS 0 +#endif + +/* 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 /* ** Compile with -Dtime_tz=T to build the tz package with a private @@ -335,6 +397,12 @@ typedef unsigned long uintmax_t; ** typical platforms. */ #if defined time_tz || EPOCH_LOCAL || EPOCH_OFFSET != 0 +# define TZ_TIME_T 1 +#else +# define TZ_TIME_T 0 +#endif + +#if TZ_TIME_T # ifdef LOCALTIME_IMPLEMENTATION static time_t sys_time(time_t *x) { return time(x); } # endif @@ -367,6 +435,8 @@ typedef time_tz tz_time_t; # 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 @@ -389,10 +459,34 @@ typedef time_tz tz_time_t; # define tzset tz_tzset # undef tzsetwall # define tzsetwall tz_tzsetwall +# 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 +# ifdef ALTZONE +# undef altzone +# define altzone tz_altzone +# endif char *ctime(time_t const *); char *ctime_r(time_t const *, char *); -double difftime(time_t, time_t); +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 *); @@ -406,18 +500,29 @@ void tzset(void); extern char *asctime_r(struct tm const *restrict, char *restrict); #endif -#if !HAVE_POSIX_DECLS -# ifdef USG_COMPAT -# ifndef timezone +#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 TZ_TIME_T || !HAVE_POSIX_DECLS +# if HAVE_TZNAME +extern char *tzname[]; +# endif +# if USG_COMPAT extern long timezone; -# endif -# ifndef daylight extern int daylight; -# endif # endif #endif -#if defined ALTZONE && !defined altzone +#ifdef ALTZONE extern long altzone; #endif @@ -427,25 +532,25 @@ extern long altzone; */ #ifdef STD_INSPIRED -# if !defined tzsetwall || defined time_tz +# if TZ_TIME_T || !defined tzsetwall void tzsetwall(void); # endif -# if !defined offtime || defined time_tz +# if TZ_TIME_T || !defined offtime struct tm *offtime(time_t const *, long); # endif -# if !defined timegm || defined time_tz +# if TZ_TIME_T || !defined timegm time_t timegm(struct tm *); # endif -# if !defined timelocal || defined time_tz +# if TZ_TIME_T || !defined timelocal time_t timelocal(struct tm *); # endif -# if !defined timeoff || defined time_tz +# if TZ_TIME_T || !defined timeoff time_t timeoff(struct tm *, long); # endif -# if !defined time2posix || defined time_tz +# if TZ_TIME_T || !defined time2posix time_t time2posix(time_t); # endif -# if !defined posix2time || defined time_tz +# if TZ_TIME_T || !defined posix2time time_t posix2time(time_t); # endif #endif @@ -479,10 +584,10 @@ 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 +# if TZ_TIME_T || !defined posix2time_z time_t posix2time_z(timezone_t, time_t) ATTRIBUTE_PURE; # endif -# if !defined time2posix_z || defined time_tz +# if TZ_TIME_T || !defined time2posix_z time_t time2posix_z(timezone_t, time_t) ATTRIBUTE_PURE; # endif # endif @@ -492,12 +597,12 @@ time_t time2posix_z(timezone_t, time_t) ATTRIBUTE_PURE; ** Finally, some convenience items. */ -#if __STDC_VERSION__ < 199901 +#if HAVE_STDBOOL_H +# include <stdbool.h> +#else # define true 1 # define false 0 # define bool int -#else -# include <stdbool.h> #endif #define TYPE_BIT(type) (sizeof (type) * CHAR_BIT) @@ -513,27 +618,32 @@ time_t time2posix_z(timezone_t, time_t) ATTRIBUTE_PURE; #define MINVAL(t, b) \ ((t) (TYPE_SIGNED(t) ? - TWOS_COMPLEMENT(t) - MAXVAL(t, b) : 0)) -/* The minimum and maximum finite time values. This implementation - assumes no padding if time_t is signed and either the compiler is - pre-C11 or time_t is not one of the standard signed integer types. */ -#if 201112 <= __STDC_VERSION__ -static time_t const time_t_min - = (TYPE_SIGNED(time_t) - ? _Generic((time_t) 0, - signed char: SCHAR_MIN, short: SHRT_MIN, - int: INT_MIN, long: LONG_MIN, long long: LLONG_MIN, - default: MINVAL(time_t, TYPE_BIT(time_t))) - : 0); -static time_t const 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: MAXVAL(time_t, TYPE_BIT(time_t))) - : -1); +/* 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 problem 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 -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)); +# define TIME_T_MIN TIME_T_MIN_NO_PADDING +# define TIME_T_MAX TIME_T_MAX_NO_PADDING #endif /* @@ -550,7 +660,7 @@ static time_t const time_t_max = MAXVAL(time_t, TYPE_BIT(time_t)); ** INITIALIZE(x) */ -#ifdef lint +#ifdef GCC_LINT # define INITIALIZE(x) ((x) = 0) #else # define INITIALIZE(x) @@ -633,7 +743,7 @@ char *ctime_r(time_t const *, char *); ** 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 C99). +** (which is allowed by C89 but not by C99 or later). ** We use this to avoid addition overflow problems. */ |