From c7d0f69ca48691f3073130431c6feca19c36df02 Mon Sep 17 00:00:00 2001 From: wangmm0220 Date: Mon, 25 Nov 2024 23:43:37 +0800 Subject: [PATCH] feat:[TD-32642] add timezone logic --- cmake/cmake.define | 8 +- contrib/CMakeLists.txt | 7 +- include/os/osTimezone.h | 1151 +------- source/client/test/clientTests.cpp | 32 +- source/libs/executor/src/hashjoinoperator.c | 2 +- source/libs/parser/src/parAstCreater.c | 1 + source/os/CMakeLists.txt | 3 +- source/os/src/osTimezone.c | 2890 ------------------- source/os/src/timezone/localtime.c | 2498 ++++++++++++++++ source/os/src/timezone/private.h | 1129 ++++++++ source/os/src/timezone/strftime.c | 662 +++++ source/os/src/timezone/tzdir.h | 6 + source/os/src/timezone/tzfile.h | 121 + utils/test/c/timezone_test.c | 1 - 14 files changed, 4466 insertions(+), 4045 deletions(-) create mode 100644 source/os/src/timezone/localtime.c create mode 100644 source/os/src/timezone/private.h create mode 100644 source/os/src/timezone/strftime.c create mode 100644 source/os/src/timezone/tzdir.h create mode 100644 source/os/src/timezone/tzfile.h diff --git a/cmake/cmake.define b/cmake/cmake.define index 1b277a1f3a..09a64526a4 100644 --- a/cmake/cmake.define +++ b/cmake/cmake.define @@ -6,14 +6,12 @@ set(TD_BUILD_KEEPER_INTERNAL FALSE) # set output directory SET(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/build/lib) SET(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/build/bin) -SET(SHARE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/build/share) SET(TD_TESTS_OUTPUT_DIR ${PROJECT_BINARY_DIR}/test) MESSAGE(STATUS "Project source directory: " ${PROJECT_SOURCE_DIR}) MESSAGE(STATUS "Project binary files output path: " ${PROJECT_BINARY_DIR}) MESSAGE(STATUS "Project executable files output path: " ${EXECUTABLE_OUTPUT_PATH}) MESSAGE(STATUS "Project library files output path: " ${LIBRARY_OUTPUT_PATH}) -MESSAGE(STATUS "Project share files output path: " ${SHARE_OUTPUT_PATH}) IF(NOT DEFINED TD_GRANT) SET(TD_GRANT FALSE) @@ -105,6 +103,12 @@ ELSE() SET(TAOS_LIB taos) ENDIF() +IF(NOT DEFINED TZ_OUTPUT_PATH) + SET(TZ_OUTPUT_PATH ${PROJECT_BINARY_DIR}/build/share/timezone) +ENDIF() +MESSAGE(STATUS "timezone output path: " ${TZ_OUTPUT_PATH}) + + # build TSZ by default IF("${TSZ_ENABLED}" MATCHES "false") set(VAR_TSZ "" CACHE INTERNAL "global variant empty") diff --git a/contrib/CMakeLists.txt b/contrib/CMakeLists.txt index 1380f036da..174077b634 100644 --- a/contrib/CMakeLists.txt +++ b/contrib/CMakeLists.txt @@ -635,10 +635,15 @@ if(${TD_LINUX} AND ${BUILD_WITH_S3}) endif() execute_process( - COMMAND make TZDIR=${SHARE_OUTPUT_PATH}/timezone clean all posix_only + COMMAND make TZDIR=${TZ_OUTPUT_PATH}/ clean all posix_only WORKING_DIRECTORY "${TD_CONTRIB_DIR}/tz" ) +set(TZ_SRC_DIR "${TD_SOURCE_DIR}/source/os/src/timezone") +file(MAKE_DIRECTORY ${TZ_SRC_DIR}) +file(COPY ${TD_CONTRIB_DIR}/tz/private.h ${TD_CONTRIB_DIR}/tz/tzdir.h ${TD_CONTRIB_DIR}/tz/tzfile.h + ${TD_CONTRIB_DIR}/tz/localtime.c ${TD_CONTRIB_DIR}/tz/strftime.c + DESTINATION ${TZ_SRC_DIR}) # ================================================================================================ # Build test # ================================================================================================ diff --git a/include/os/osTimezone.h b/include/os/osTimezone.h index 52f7f661af..2e3d27212f 100644 --- a/include/os/osTimezone.h +++ b/include/os/osTimezone.h @@ -20,1149 +20,6 @@ extern "C" { #endif -/* PORT_TO_C89 means the code should work even if the underlying - compiler and library support only C89 plus C99's 'long long' - and perhaps a few other extensions to C89. - - This macro is obsolescent, and the plan is to remove it along with - associated code. A good time to do that might be in the year 2029 - because RHEL 7 (whose GCC defaults to C89) extended life cycle - support (ELS) is scheduled to end on 2028-06-30. */ -#ifndef PORT_TO_C89 -# define PORT_TO_C89 0 -#endif - -/* SUPPORT_C89 means the tzcode library should support C89 callers - in addition to the usual support for C99-and-later callers. - This defaults to 1 as POSIX requires, even though that can trigger - latent bugs in callers. */ -#ifndef SUPPORT_C89 -# define SUPPORT_C89 1 -#endif - -#ifndef __STDC_VERSION__ -# define __STDC_VERSION__ 0 -#endif - -/* Define true, false and bool if they don't work out of the box. */ -#if PORT_TO_C89 && __STDC_VERSION__ < 199901 -# define true 1 -# define false 0 -# define bool int -#elif __STDC_VERSION__ < 202311 -# include -#endif - -#if __STDC_VERSION__ < 202311 -# undef static_assert_tz -# define static_assert_tz(cond) extern int static_assert_check[(cond) ? 1 : -1] -#endif - -/* -** 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" - -/* -** Defaults for preprocessor symbols. -** You can override these in your C compiler options, e.g. '-DHAVE_GETTEXT=1'. -*/ - -#if !defined HAVE__GENERIC && defined __has_extension -# if !__has_extension(c_generic_selections) -# define HAVE__GENERIC 0 -# endif -#endif -/* _Generic is buggy in pre-4.9 GCC. */ -#if !defined HAVE__GENERIC && defined __GNUC__ && !defined __STRICT_ANSI__ -# define HAVE__GENERIC (4 < __GNUC__ + (9 <= __GNUC_MINOR__)) -#endif -#ifndef HAVE__GENERIC -# define HAVE__GENERIC (201112 <= __STDC_VERSION__) -#endif - -#if !defined HAVE_GETTEXT && defined __has_include -# if __has_include() -# define HAVE_GETTEXT true -# endif -#endif -#ifndef HAVE_GETTEXT -# define HAVE_GETTEXT false -#endif - -#ifndef HAVE_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_SETENV -# define HAVE_SETENV 1 -#endif - -#ifndef HAVE_STRDUP -# define HAVE_STRDUP 1 -#endif - -#ifndef HAVE_SYMLINK -# define HAVE_SYMLINK 1 -#endif /* !defined HAVE_SYMLINK */ - -#if !defined HAVE_SYS_STAT_H && defined __has_include -# if !__has_include() -# define HAVE_SYS_STAT_H false -# endif -#endif -#ifndef HAVE_SYS_STAT_H -# define HAVE_SYS_STAT_H true -#endif - -#if !defined HAVE_UNISTD_H && defined __has_include -# if !__has_include() -# define HAVE_UNISTD_H false -# endif -#endif -#ifndef HAVE_UNISTD_H -# define HAVE_UNISTD_H true -#endif - -#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, 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 - -/* On GNUish systems where time_t might be 32 or 64 bits, use 64. - On these platforms _FILE_OFFSET_BITS must also be 64; otherwise - setting _TIME_BITS to 64 does not work. The code does not - otherwise rely on _FILE_OFFSET_BITS being 64, since it does not - use off_t or functions like 'stat' that depend on off_t. */ -#ifndef _FILE_OFFSET_BITS -# define _FILE_OFFSET_BITS 64 -#endif -#if !defined _TIME_BITS && _FILE_OFFSET_BITS == 64 -# define _TIME_BITS 64 -#endif - -/* -** Nested includes -*/ - -/* 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 -#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 -#include -#if !PORT_TO_C89 -# include -#endif -#include /* for CHAR_BIT et al. */ -#include - -#include - -#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 - -#if HAVE_GETTEXT -# include -#endif /* HAVE_GETTEXT */ - -#if HAVE_UNISTD_H -# include /* for R_OK, and other POSIX goodness */ -#endif /* HAVE_UNISTD_H */ - -/* SUPPORT_POSIX2008 means the tzcode library should support - POSIX.1-2017-and-earlier callers in addition to the usual support for - POSIX.1-2024-and-later callers; however, this can be - incompatible with POSIX.1-2024-and-later callers. - This macro is obsolescent, and the plan is to remove it - along with any code needed only when it is nonzero. - A good time to do that might be in the year 2034. - This macro's name is SUPPORT_POSIX2008 because _POSIX_VERSION == 200809 - in POSIX.1-2017, a minor revision of POSIX.1-2008. */ -#ifndef SUPPORT_POSIX2008 -# if defined _POSIX_VERSION && _POSIX_VERSION <= 200809 -# define SUPPORT_POSIX2008 1 -# else -# define SUPPORT_POSIX2008 0 -# endif -#endif - -#ifndef HAVE_DECL_ASCTIME_R -# if SUPPORT_POSIX2008 -# define HAVE_DECL_ASCTIME_R 1 -# else -# define HAVE_DECL_ASCTIME_R 0 -# endif -#endif - -#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 -#endif /* !defined R_OK */ - -#if PORT_TO_C89 - -/* -** Define HAVE_STDINT_H's default value here, rather than at the -** 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. -*/ -#if !defined HAVE_STDINT_H && defined __has_include -# define HAVE_STDINT_H true /* C23 __has_include implies C99 stdint.h. */ -#endif -#ifndef HAVE_STDINT_H -# 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 -#endif /* !HAVE_STDINT_H */ - -#ifndef HAVE_INTTYPES_H -# define HAVE_INTTYPES_H HAVE_STDINT_H -#endif -#if HAVE_INTTYPES_H -# include -#endif - -/* Pre-C99 GCC compilers define __LONG_LONG_MAX__ instead of LLONG_MAX. */ -#if defined __LONG_LONG_MAX__ && !defined __STRICT_ANSI__ -# ifndef LLONG_MAX -# define LLONG_MAX __LONG_LONG_MAX__ -# endif -# ifndef LLONG_MIN -# define LLONG_MIN (-1 - LLONG_MAX) -# endif -# ifndef ULLONG_MAX -# define ULLONG_MAX (LLONG_MAX * 2ull + 1) -# endif -#endif - -#ifndef INT_FAST64_MAX -# if 1 <= LONG_MAX >> 31 >> 31 -typedef long int_fast64_t; -# define INT_FAST64_MIN LONG_MIN -# define INT_FAST64_MAX LONG_MAX -# else -/* If this fails, compile with -DHAVE_STDINT_H or with a better compiler. */ -typedef long long int_fast64_t; -# define INT_FAST64_MIN LLONG_MIN -# define INT_FAST64_MAX LLONG_MAX -# endif -#endif - -#ifndef PRIdFAST64 -# if INT_FAST64_MAX == LONG_MAX -# define PRIdFAST64 "ld" -# else -# define PRIdFAST64 "lld" -# 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; -# ifndef HAVE_STRTOLL -# define HAVE_STRTOLL true -# endif -# 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 PTRDIFF_MAX -# define PTRDIFF_MAX MAXVAL(ptrdiff_t, TYPE_BIT(ptrdiff_t)) -#endif - -#ifndef UINT_FAST32_MAX -typedef unsigned long uint_fast32_t; -#endif - -#ifndef UINT_FAST64_MAX -# if 3 <= ULONG_MAX >> 31 >> 31 -typedef unsigned long uint_fast64_t; -# define UINT_FAST64_MAX ULONG_MAX -# else -/* If this fails, compile with -DHAVE_STDINT_H or with a better compiler. */ -typedef unsigned long long uint_fast64_t; -# define UINT_FAST64_MAX ULLONG_MAX -# endif -#endif - -#ifndef UINTMAX_MAX -# ifdef ULLONG_MAX -typedef unsigned long long uintmax_t; -# define UINTMAX_MAX ULLONG_MAX -# else -typedef unsigned long uintmax_t; -# define UINTMAX_MAX ULONG_MAX -# endif -#endif - -#ifndef PRIuMAX -# ifdef ULLONG_MAX -# define PRIuMAX "llu" -# else -# define PRIuMAX "lu" -# endif -#endif - -#ifndef SIZE_MAX -# define SIZE_MAX ((size_t) -1) -#endif - -#endif /* PORT_TO_C89 */ - -/* The maximum size of any created object, as a signed integer. - Although the C standard does not outright prohibit larger objects, - behavior is undefined if the result of pointer subtraction does not - fit into ptrdiff_t, and the code assumes in several places that - pointer subtraction works. As a practical matter it's OK to not - support objects larger than this. */ -#define INDEX_MAX ((ptrdiff_t) min_tz(PTRDIFF_MAX, SIZE_MAX)) - -/* Support ckd_add, ckd_sub, ckd_mul on C23 or recent-enough GCC-like - hosts, unless compiled with -DHAVE_STDCKDINT_H=0 or with pre-C23 EDG. */ -#if !defined HAVE_STDCKDINT_H && defined __has_include -# if __has_include() -# define HAVE_STDCKDINT_H true -# endif -#endif -#ifdef HAVE_STDCKDINT_H -# if HAVE_STDCKDINT_H -# include -# endif -#elif defined __EDG__ -/* Do nothing, to work around EDG bug . */ -#elif defined __has_builtin -# if __has_builtin(__builtin_add_overflow) -# define ckd_add(r, a, b) __builtin_add_overflow(a, b, r) -# endif -# if __has_builtin(__builtin_sub_overflow) -# define ckd_sub(r, a, b) __builtin_sub_overflow(a, b, r) -# endif -# if __has_builtin(__builtin_mul_overflow) -# define ckd_mul(r, a, b) __builtin_mul_overflow(a, b, r) -# endif -#elif 7 <= __GNUC__ -# define ckd_add(r, a, b) __builtin_add_overflow(a, b, r) -# define ckd_sub(r, a, b) __builtin_sub_overflow(a, b, r) -# define ckd_mul(r, a, b) __builtin_mul_overflow(a, b, r) -#endif - -#if (defined __has_c_attribute \ - && (202311 <= __STDC_VERSION__ || !defined __STRICT_ANSI__)) -# define HAVE___HAS_C_ATTRIBUTE true -#else -# define HAVE___HAS_C_ATTRIBUTE false -#endif - -#if HAVE___HAS_C_ATTRIBUTE -# if __has_c_attribute(deprecated) -# define ATTRIBUTE_DEPRECATED [[deprecated]] -# endif -#endif -#ifndef ATTRIBUTE_DEPRECATED -# if 3 < __GNUC__ + (2 <= __GNUC_MINOR__) -# define ATTRIBUTE_DEPRECATED __attribute__((deprecated)) -# else -# define ATTRIBUTE_DEPRECATED /* empty */ -# endif -#endif - -#if HAVE___HAS_C_ATTRIBUTE -# if __has_c_attribute(fallthrough) -# define ATTRIBUTE_FALLTHROUGH [[fallthrough]] -# endif -#endif -#ifndef ATTRIBUTE_FALLTHROUGH -# if 7 <= __GNUC__ -# define ATTRIBUTE_FALLTHROUGH __attribute__((fallthrough)) -# else -# define ATTRIBUTE_FALLTHROUGH ((void) 0) -# endif -#endif - -#if HAVE___HAS_C_ATTRIBUTE -# if __has_c_attribute(maybe_unused) -# define ATTRIBUTE_MAYBE_UNUSED [[maybe_unused]] -# endif -#endif -#ifndef ATTRIBUTE_MAYBE_UNUSED -# if 2 < __GNUC__ + (7 <= __GNUC_MINOR__) -# define ATTRIBUTE_MAYBE_UNUSED __attribute__((unused)) -# else -# define ATTRIBUTE_MAYBE_UNUSED /* empty */ -# endif -#endif - -#if HAVE___HAS_C_ATTRIBUTE -# if __has_c_attribute(noreturn) -# define ATTRIBUTE_NORETURN [[noreturn]] -# endif -#endif -#ifndef ATTRIBUTE_NORETURN -# if 201112 <= __STDC_VERSION__ -# define ATTRIBUTE_NORETURN _Noreturn -# elif 2 < __GNUC__ + (8 <= __GNUC_MINOR__) -# define ATTRIBUTE_NORETURN __attribute__((noreturn)) -# else -# define ATTRIBUTE_NORETURN /* empty */ -# endif -#endif - -#if HAVE___HAS_C_ATTRIBUTE -# if __has_c_attribute(reproducible) -# define ATTRIBUTE_REPRODUCIBLE [[reproducible]] -# endif -#endif -#ifndef ATTRIBUTE_REPRODUCIBLE -# define ATTRIBUTE_REPRODUCIBLE /* empty */ -#endif - -/* GCC attributes that are useful in tzcode. - __attribute__((pure)) is stricter than [[reproducible]], - so the latter is an adequate substitute in non-GCC C23 platforms. */ -#if __GNUC__ < 3 -# define ATTRIBUTE_FORMAT(spec) /* empty */ -# define ATTRIBUTE_PURE ATTRIBUTE_REPRODUCIBLE -#else -# define ATTRIBUTE_FORMAT(spec) __attribute__((format spec)) -# define ATTRIBUTE_PURE __attribute__((pure)) -#endif - -/* Avoid GCC bug 114833 . - Remove this macro and its uses when the bug is fixed in a GCC release, - because only the latest GCC matters for $(GCC_DEBUG_FLAGS). */ -#ifdef GCC_LINT -# define ATTRIBUTE_PURE_114833 ATTRIBUTE_PURE -#else -# define ATTRIBUTE_PURE_114833 /* empty */ -#endif - -#if (__STDC_VERSION__ < 199901 && !defined restrict \ - && (PORT_TO_C89 || defined _MSC_VER)) -# define restrict /* empty */ -#endif - -/* -** Workarounds for compilers/systems. -*/ - -#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 - -/* 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 -** 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 - -#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 ctime -# define ctime tz_ctime -# 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 SUPPORT_POSIX2008 -# undef asctime_r -# define asctime_r tz_asctime_r -# undef ctime_r -# define ctime_r tz_ctime_r -# endif -# 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 - -# if __STDC_VERSION__ < 202311 -# define DEPRECATED_IN_C23 /* empty */ -# else -# define DEPRECATED_IN_C23 ATTRIBUTE_DEPRECATED -# endif -DEPRECATED_IN_C23 char *asctime(struct tm const *); -DEPRECATED_IN_C23 char *ctime(time_t const *); -#if SUPPORT_POSIX2008 -char *asctime_r(struct tm const *restrict, char *restrict); -char *ctime_r(time_t const *, char *); -#endif -double difftime(time_t, time_t); -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 *); -time_t timegm(struct tm *); -void tzset(void); -#endif - -#ifndef HAVE_DECL_TIMEGM -# if (202311 <= __STDC_VERSION__ \ - || defined __GLIBC__ || defined __tm_zone /* musl */ \ - || defined __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__ \ - || (defined __APPLE__ && defined __MACH__)) -# define HAVE_DECL_TIMEGM true -# else -# define HAVE_DECL_TIMEGM false -# endif -#endif -#if !HAVE_DECL_TIMEGM && !defined timegm -time_t timegm(struct tm *); -#endif - -#if !HAVE_DECL_ASCTIME_R && !defined asctime_r && SUPPORT_POSIX2008 -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 - -/* -** The STD_INSPIRED functions are similar, but most also need -** declarations if time_tz is defined. -*/ - -#ifndef STD_INSPIRED -# define STD_INSPIRED 0 -#endif -#if STD_INSPIRED -# if TZ_TIME_T || !defined offtime -struct tm *offtime(time_t const *, long); -# endif -# if TZ_TIME_T || !defined timelocal -time_t timelocal(struct tm *); -# endif -# if TZ_TIME_T || !defined timeoff -# define EXTERN_TIMEOFF -# 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 - -/* Infer TM_ZONE on systems where this information is known, but suppress - guessing if NO_TM_ZONE is defined. Similarly for TM_GMTOFF. */ -#if (200809 < _POSIX_VERSION \ - || defined __GLIBC__ \ - || defined __tm_zone /* musl */ \ - || 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, time_t const *, - struct tm *); -time_t mktime_z(timezone_t, struct tm *); -timezone_t tzalloc(char const *); -void tzfree(timezone_t); -# if STD_INSPIRED -# if TZ_TIME_T || !defined posix2time_z -ATTRIBUTE_PURE time_t posix2time_z(timezone_t, time_t); -# endif -# if TZ_TIME_T || !defined time2posix_z -ATTRIBUTE_PURE time_t time2posix_z(timezone_t, time_t); -# endif -# endif -#endif - -/* -** Finally, some convenience items. -*/ - -#define TYPE_BIT(type) (CHAR_BIT * (ptrdiff_t) sizeof(type)) -#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_tz(a, b) ((a) > (b) ? (a) : (b)) -#define min_tz(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) -enum { SIGNED_PADDING_CHECK_NEEDED - = _Generic((time_t) 0, - signed char: false, short: false, - int: false, long: false, long long: false, - default: true) }; -#else -# define TIME_T_MIN TIME_T_MIN_NO_PADDING -# define TIME_T_MAX TIME_T_MAX_NO_PADDING -enum { SIGNED_PADDING_CHECK_NEEDED = true }; -#endif -/* Try to check the padding assumptions. Although TIME_T_MAX and the - following check can both have undefined behavior on oddball - platforms due to shifts exceeding widths of signed integers, these - platforms' compilers are likely to diagnose these issues in integer - constant expressions, so it shouldn't hurt to check statically. */ -static_assert_tz(! TYPE_SIGNED(time_t) || ! SIGNED_PADDING_CHECK_NEEDED - || TIME_T_MAX >> (TYPE_BIT(time_t) - 2) == 1); - -/* -** 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)) - -/* -** INITIALIZE(x) -*/ - -#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 - -/* localtime.c sometimes needs access to timeoff if it is not already public. - tz_private_timeoff should be used only by localtime.c. */ -#if (!defined EXTERN_TIMEOFF \ - && defined TM_GMTOFF && (200809 < _POSIX_VERSION || ! UNINIT_TRAP)) -# ifndef timeoff -# define timeoff tz_private_timeoff -# endif -# define EXTERN_TIMEOFF -#endif -#ifdef EXTERN_TIMEOFF -time_t timeoff(struct tm *, long); -#endif - -#ifdef DEBUG -# undef unreachable -# define unreachable() abort() -#elif !defined unreachable -# ifdef __has_builtin -# if __has_builtin(__builtin_unreachable) -# define unreachable() __builtin_unreachable() -# endif -# elif 4 < __GNUC__ + (5 <= __GNUC_MINOR__) -# define unreachable() __builtin_unreachable() -# endif -# ifndef unreachable -# define unreachable() ((void) 0) -# endif -#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. -*/ - -#if HAVE_GETTEXT -#define _(msgid) gettext(msgid) -#else /* !HAVE_GETTEXT */ -#define _(msgid) msgid -#endif /* !HAVE_GETTEXT */ - -#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 *restrict, char *restrict); -char *ctime_r(time_t const *, char *); -#endif /* HAVE_INCOMPATIBLE_CTIME_R */ - -/* 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) - -/* How many years to generate (in zic.c) or search through (in localtime.c). - This is two years larger than the obvious 400, to avoid edge cases. - E.g., suppose a rule applies from 2012 on with transitions - in March and September, plus one-off transitions in November 2013, - and suppose the rule cannot be expressed as a proleptic TZ string. - If zic looked only at the last 400 years, it would set max_year=2413, - with the intent that the 400 years 2014 through 2413 will be repeated. - The last transition listed in the tzfile would be in 2413-09, - less than 400 years after the last one-off transition in 2013-11. - Two years is not overkill for localtime.c, as a one-year bump - would mishandle 2023d's America/Ciudad_Juarez for November 2422. */ -enum { years_of_observations = YEARSPERREPEAT + 2 }; - -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)) - -/* -** 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. -*/ - -#define isleap_sum(a, b) isleap((a) % 400 + (b) % 400) - -#ifndef TZDEFRULES -# define TZDEFRULES "posixrules" -#endif /* !defined TZDEFRULES */ - - -/* See Internet RFC 8536 for more details about the following format. */ - -/* -** Each file begins with. . . -*/ - -#define TZ_MAGIC "TZif" - -struct tzhead { - char tzh_magic[4]; /* TZ_MAGIC */ - char tzh_version[1]; /* '\0' or '2'-'4' as of 2021 */ - char tzh_reserved[15]; /* reserved; must be zero */ - char tzh_ttisutcnt[4]; /* coded number of trans. time flags */ - char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ - char tzh_leapcnt[4]; /* coded number of leap seconds */ - char tzh_timecnt[4]; /* coded number of transition times */ - char tzh_typecnt[4]; /* coded number of local time types */ - char tzh_charcnt[4]; /* coded number of abbr. chars */ -}; - -/* -** . . .followed by. . . -** -** tzh_timecnt (char [4])s coded transition times a la time(2) -** tzh_timecnt (unsigned char)s types of local time starting at above -** tzh_typecnt repetitions of -** one (char [4]) coded UT offset in seconds -** one (unsigned char) used to set tm_isdst -** one (unsigned char) that's an abbreviation list index -** tzh_charcnt (char)s '\0'-terminated zone abbreviations -** tzh_leapcnt repetitions of -** one (char [4]) coded leap second transition times -** one (char [4]) total correction after above -** tzh_ttisstdcnt (char)s indexed by type; if 1, transition -** time is standard time, if 0, -** transition time is local (wall clock) -** time; if absent, transition times are -** assumed to be local time -** tzh_ttisutcnt (char)s indexed by type; if 1, transition -** time is UT, if 0, transition time is -** local time; if absent, transition -** times are assumed to be local time. -** When this is 1, the corresponding -** std/wall indicator must also be 1. -*/ - -/* -** If tzh_version is '2' or greater, the above is followed by a second instance -** of tzhead and a second instance of the data in which each coded transition -** time uses 8 rather than 4 chars, -** then a POSIX.1-2017 proleptic TZ string for use in handling -** instants after the last transition time stored in the file -** (with nothing between the newlines if there is no POSIX.1-2017 -** representation for such instants). -** -** If tz_version is '3' or greater, the TZ string can be any POSIX.1-2024 -** proleptic TZ string, which means the above is extended as follows. -** First, the TZ string's hour offset may range from -167 -** through 167 as compared to the range 0 through 24 required -** by POSIX.1-2017 and earlier. -** Second, its DST start time may be January 1 at 00:00 and its stop -** time December 31 at 24:00 plus the difference between DST and -** standard time, indicating DST all year. -*/ - -/* -** In the current implementation, "tzset()" refuses to deal with files that -** exceed any of the limits below. -*/ - -#ifndef TZ_MAX_TIMES -/* This must be at least 242 for Europe/London with 'zic -b fat'. */ -# define TZ_MAX_TIMES 2000 -#endif /* !defined TZ_MAX_TIMES */ - -#ifndef TZ_MAX_TYPES -/* This must be at least 18 for Europe/Vilnius with 'zic -b fat'. */ -# define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ -#endif /* !defined TZ_MAX_TYPES */ - -#ifndef TZ_MAX_CHARS -/* This must be at least 40 for America/Anchorage. */ -# define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ -/* (limited by what unsigned chars can hold) */ -#endif /* !defined TZ_MAX_CHARS */ - -#ifndef TZ_MAX_LEAPS -/* This must be at least 27 for leap seconds from 1972 through mid-2023. - There's a plan to discontinue leap seconds by 2035. */ -# define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ -#endif /* !defined TZ_MAX_LEAPS */ - -#ifndef TZDEFAULT -# define TZDEFAULT "/etc/localtime" /* default zone */ -#endif -#ifndef TZDIR -# define TZDIR "/Users/mingmingwanng/source_code/TDengine/debug/build/share/timezone" /* TZif directory */ -#endif - enum TdTimezone { TdWestZone12 = -12, TdWestZone11, @@ -1191,9 +48,13 @@ enum TdTimezone { TdEastZone12 }; -void getTimezoneStr(char *tz); - +typedef struct state *timezone_t; +struct tm *localtime_rz(timezone_t , time_t const *, struct tm *); +time_t mktime_z(timezone_t, struct tm *); +timezone_t tzalloc(char const *); +void tzfree(timezone_t); +void getTimezoneStr(char *tz); int32_t taosGetSystemTimezone(char *outTimezone); int32_t taosSetGlobalTimezone(const char *tz); int32_t taosFormatTimezoneStr(time_t t, const char* tzStr, timezone_t sp, char *outTimezoneStr); diff --git a/source/client/test/clientTests.cpp b/source/client/test/clientTests.cpp index 97d863b330..1e4faa3eae 100644 --- a/source/client/test/clientTests.cpp +++ b/source/client/test/clientTests.cpp @@ -1764,10 +1764,11 @@ TEST(clientCase, func_timezone_Test) { check_sql_result(pConn, "select TO_ISO8601(TIMETRUNCATE(1704142800000, 1d, 0))", "2024-01-01T02:00:00.000+0200"); // 2024-01-01 23:00:00+0200 check_sql_result(pConn, "select TO_ISO8601(TIMETRUNCATE(ts, 1w, 1)) from db1.ntb", "2023-12-28T00:00:00.000+0200"); // 2024-01-01 23:00:00+0200 -// int64_t now = get_sql_result(pConn, "select now(),now() + 2d"); -// int64_t locationNow = now + 2 * 3600; -// check_sql_result_partial(pConn, "select TO_ISO8601(today())", "T00:00:00.000+0200"); // 2024-01-01 23:00:00+0200 -// check_sql_result_partial(pConn, "select TO_ISO8601(now())", "+0200"); // 2024-01-01 23:00:00+0200 + // TODAY + check_sql_result_partial(pConn, "select TO_ISO8601(today())", "T00:00:00.000+0200"); + + // NOW + check_sql_result_partial(pConn, "select TO_ISO8601(now())", "+0200"); // WEEKDAY check_sql_result_integer(pConn, "select WEEKDAY('2024-01-01')", 0); @@ -1831,6 +1832,29 @@ TEST(clientCase, func_timezone_Test) { check_sql_result(pConn, "select TO_CHAR(cast(1704142800000 as timestamp), 'yyyy-mm-dd hh24:mi:ss tzh')", "2024-01-01 23:00:00 +02"); check_sql_result(pConn, "select TO_CHAR(cast(1704142800000 as timestamp), 'yyyy-mm-dd hh24:mi:ss')", "2024-01-01 23:00:00"); + // TIMEDIFF + check_sql_result_integer(pConn, "select TIMEDIFF(c1, '2024-01-01T23:00:00.001+02') from db1.ntb", -21600001); // use timezone in server UTC-8 + check_sql_result_integer(pConn, "select TIMEDIFF(c1, '2024-01-01T23:00:00.001') from db1.ntb", -1); // use timezone in server UTC-8 + check_sql_result_integer(pConn, "select TIMEDIFF('2024-01-01T23:00:00.001', '2024-01-01T13:00:00.000-08')", 1); + + // CAST + check_sql_result_integer(pConn, "select CAST(c1 as timestamp) from db1.ntb", 1704121200000); + check_sql_result_integer(pConn, "select CAST('2024-01-01T23:00:00.000+02' as timestamp)", 1704142800000); + check_sql_result_integer(pConn, "select CAST('2024-01-01T23:00:00.000' as timestamp)", 1704142800000); + + taos_close(pConn); + + // hash join + pConn = getConnWithOption("UTC+1"); + + execQuery(pConn, "drop database if exists db1"); + execQuery(pConn, "create database db1"); + execQuery(pConn, "create table db1.ntb (ts timestamp, c1 binary(32), c2 int)"); + execQuery(pConn, "create table db1.ntb1 (ts timestamp, c1 binary(32), c2 int)"); + execQuery(pConn, "insert into db1.ntb values(1703987400000, '2023-12-31 00:50:00', 1)"); // 2023-12-31 00:50:00-0100 + execQuery(pConn, "insert into db1.ntb1 values(1704070200000, '2023-12-31 23:50:00', 11)"); // 2023-12-31 23:50:00-0100 + checkRows(pConn, "select a.ts,b.ts from db1.ntb a join db1.ntb1 b on timetruncate(a.ts, 1d) = timetruncate(b.ts, 1d)", 1); + taos_close(pConn); } diff --git a/source/libs/executor/src/hashjoinoperator.c b/source/libs/executor/src/hashjoinoperator.c index 1f43a429b3..6fe3eb43dc 100644 --- a/source/libs/executor/src/hashjoinoperator.c +++ b/source/libs/executor/src/hashjoinoperator.c @@ -114,7 +114,7 @@ int32_t hJoinLaunchPrimExpr(SSDataBlock* pBlock, SHJoinTableCtx* pTable, int32_t SColumnInfoData* pPrimOut = taosArrayGet(pBlock->pDataBlock, pTable->primCtx.targetSlotId); if (0 != pCtx->timezoneUnit) { for (int32_t i = startIdx; i <= endIdx; ++i) { - ((int64_t*)pPrimOut->pData)[i] = ((int64_t*)pPrimIn->pData)[i] - (((int64_t*)pPrimIn->pData)[i] - pCtx->timezoneUnit) % pCtx->truncateUnit; + ((int64_t*)pPrimOut->pData)[i] = ((int64_t*)pPrimIn->pData)[i] - (((int64_t*)pPrimIn->pData)[i] + pCtx->timezoneUnit) % pCtx->truncateUnit; } } else { for (int32_t i = startIdx; i <= endIdx; ++i) { diff --git a/source/libs/parser/src/parAstCreater.c b/source/libs/parser/src/parAstCreater.c index cceebd627e..1cfdf1e636 100644 --- a/source/libs/parser/src/parAstCreater.c +++ b/source/libs/parser/src/parAstCreater.c @@ -1063,6 +1063,7 @@ SNode* createCastFunctionNode(SAstCreateContext* pCxt, SNode* pExpr, SDataType d } pCxt->errCode = nodesListMakeAppend(&func->pParameterList, pExpr); CHECK_PARSER_STATUS(pCxt); + func->tz = pCxt->pQueryCxt->timezone; return (SNode*)func; _err: nodesDestroyNode((SNode*)func); diff --git a/source/os/CMakeLists.txt b/source/os/CMakeLists.txt index 32609301a9..dbcf0f9080 100644 --- a/source/os/CMakeLists.txt +++ b/source/os/CMakeLists.txt @@ -1,5 +1,6 @@ aux_source_directory(src OS_SRC) -add_library(os STATIC ${OS_SRC}) +aux_source_directory(src/timezone OS_TZ) +add_library(os STATIC ${OS_SRC} ${OS_TZ}) target_include_directories( os PUBLIC "${TD_SOURCE_DIR}/include/os" diff --git a/source/os/src/osTimezone.c b/source/os/src/osTimezone.c index 83100d4327..5511043cd2 100644 --- a/source/os/src/osTimezone.c +++ b/source/os/src/osTimezone.c @@ -939,2894 +939,4 @@ int32_t taosGetSystemTimezone(char *outTimezoneStr) { time_t tx1 = taosGetTimestampSec(); return taosFormatTimezoneStr(tx1, tz, NULL, outTimezoneStr); #endif -} - -#if defined THREAD_SAFE && THREAD_SAFE -# include -static pthread_mutex_t locallock = PTHREAD_MUTEX_INITIALIZER; -static int lock(void) { return pthread_mutex_lock(&locallock); } -static void unlock(void) { pthread_mutex_unlock(&locallock); } -#else -static int lock(void) { return 0; } -static void unlock(void) { } -#endif - -#ifndef TZ_ABBR_CHAR_SET -# define TZ_ABBR_CHAR_SET \ - "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 :+-._" -#endif /* !defined TZ_ABBR_CHAR_SET */ - -#ifndef TZ_ABBR_ERR_CHAR -# define TZ_ABBR_ERR_CHAR '_' -#endif /* !defined TZ_ABBR_ERR_CHAR */ - -/* -** Support non-POSIX platforms that distinguish between text and binary files. -*/ - -#ifndef O_BINARY -# define O_BINARY 0 -#endif - -#ifndef WILDABBR -/* -** Someone might make incorrect use of a time zone abbreviation: -** 1. They might reference tzname[0] before calling tzset (explicitly -** or implicitly). -** 2. They might reference tzname[1] before calling tzset (explicitly -** or implicitly). -** 3. They might reference tzname[1] after setting to a time zone -** in which Daylight Saving Time is never observed. -** 4. They might reference tzname[0] after setting to a time zone -** in which Standard Time is never observed. -** 5. They might reference tm.TM_ZONE after calling offtime. -** What's best to do in the above cases is open to debate; -** for now, we just set things up so that in any of the five cases -** WILDABBR is used. Another possibility: initialize tzname[0] to the -** string "tzname[0] used before set", and similarly for the other cases. -** And another: initialize tzname[0] to "ERA", with an explanation in the -** manual page of what this "time zone abbreviation" means (doing this so -** that tzname[0] has the "normal" length of three characters). -*/ -# define WILDABBR " " -#endif /* !defined WILDABBR */ - -static const char wildabbr[] = WILDABBR; - -static char const etc_utc[] = "Etc/UTC"; -static char const *utc = etc_utc + sizeof "Etc/" - 1; - -/* -** The DST rules to use if TZ has no rules and we can't load TZDEFRULES. -** Default to US rules as of 2017-05-07. -** POSIX does not specify the default DST rules; -** for historical reasons, US rules are a common default. -*/ -#ifndef TZDEFRULESTRING -# define TZDEFRULESTRING ",M3.2.0,M11.1.0" -#endif - -struct ttinfo { /* time type information */ - int_fast32_t tt_utoff; /* UT offset in seconds */ - bool tt_isdst; /* used to set tm_isdst */ - int tt_desigidx; /* abbreviation list index */ - bool tt_ttisstd; /* transition is std time */ - bool tt_ttisut; /* transition is UT */ -}; - -struct lsinfo { /* leap second information */ - time_t ls_trans; /* transition time */ - int_fast32_t ls_corr; /* correction to apply */ -}; - -/* This abbreviation means local time is unspecified. */ -static char const UNSPEC[] = "-00"; - -/* How many extra bytes are needed at the end of struct state's chars array. - This needs to be at least 1 for null termination in case the input - data isn't properly terminated, and it also needs to be big enough - for ttunspecified to work without crashing. */ -enum { CHARS_EXTRA = max_tz(sizeof UNSPEC, 2) - 1 }; - -/* Limit to time zone abbreviation length in proleptic TZ strings. - This is distinct from TZ_MAX_CHARS, which limits TZif file contents. */ -#ifndef TZNAME_MAXIMUM -# define TZNAME_MAXIMUM 255 -#endif - -/* A representation of the contents of a TZif file. Ideally this - would have no size limits; the following sizes should suffice for - practical use. This struct should not be too large, as instances - are put on the stack and stacks are relatively small on some platforms. - See tzfile.h for more about the sizes. */ -struct state { - int leapcnt; - int timecnt; - int typecnt; - int charcnt; - bool goback; - bool goahead; - time_t ats[TZ_MAX_TIMES]; - unsigned char types[TZ_MAX_TIMES]; - struct ttinfo ttis[TZ_MAX_TYPES]; - char chars[max_tz(max_tz(TZ_MAX_CHARS + CHARS_EXTRA, sizeof "UTC"), - 2 * (TZNAME_MAXIMUM + 1))]; - struct lsinfo lsis[TZ_MAX_LEAPS]; -}; - -enum r_type { - JULIAN_DAY, /* Jn = Julian day */ - DAY_OF_YEAR, /* n = day of year */ - MONTH_NTH_DAY_OF_WEEK /* Mm.n.d = month, week, day of week */ -}; - -struct rule { - enum r_type r_type; /* type of rule */ - int r_day; /* day number of rule */ - int r_week; /* week number of rule */ - int r_mon; /* month number of rule */ - int_fast32_t r_time; /* transition time of rule */ -}; - -static struct tm *gmtsub(struct state const *, time_t const *, int_fast32_t, - struct tm *); -static bool increment_overflow(int *, int); -static bool increment_overflow_time(time_t *, int_fast32_t); -static int_fast32_t leapcorr(struct state const *, time_t); -static bool normalize_overflow32(int_fast32_t *, int *, int); -static struct tm *timesub(time_t const *, int_fast32_t, struct state const *, - struct tm *); -static bool tzparse(char const *, struct state *, struct state const *); - -#ifdef ALL_STATE -static struct state * lclptr; -static struct state * gmtptr; -#endif /* defined ALL_STATE */ - -#ifndef ALL_STATE -static struct state lclmem; -static struct state gmtmem; -static struct state *const lclptr = &lclmem; -static struct state *const gmtptr = &gmtmem; -#endif /* State Farm */ - -#ifndef TZ_STRLEN_MAX -# define TZ_STRLEN_MAX 255 -#endif /* !defined TZ_STRLEN_MAX */ - -static char lcl_TZname[TZ_STRLEN_MAX + 1]; -static int lcl_is_set; - -/* -** Section 4.12.3 of X3.159-1989 requires that -** Except for the strftime function, these functions [asctime, -** ctime, gmtime, localtime] return values in one of two static -** objects: a broken-down time structure and an array of char. -** Thanks to Paul Eggert for noting this. -** -** Although this requirement was removed in C99 it is still present in POSIX. -** Follow the requirement if SUPPORT_C89, even though this is more likely to -** trigger latent bugs in programs. -*/ - -#if SUPPORT_C89 -static struct tm tm; -#endif - -#if 2 <= HAVE_TZNAME + TZ_TIME_T -char * tzname[2] = { - (char *) wildabbr, - (char *) wildabbr -}; -#endif -#if 2 <= USG_COMPAT + TZ_TIME_T -long timezone; -int daylight; -#endif -#if 2 <= ALTZONE + TZ_TIME_T -long altzone; -#endif - -/* Initialize *S to a value based on UTOFF, ISDST, and DESIGIDX. */ -static void -init_ttinfo(struct ttinfo *s, int_fast32_t utoff, bool isdst, int desigidx) -{ - s->tt_utoff = utoff; - s->tt_isdst = isdst; - s->tt_desigidx = desigidx; - s->tt_ttisstd = false; - s->tt_ttisut = false; -} - -/* Return true if SP's time type I does not specify local time. */ -static bool -ttunspecified(struct state const *sp, int i) -{ - char const *abbr = &sp->chars[sp->ttis[i].tt_desigidx]; - /* memcmp is likely faster than strcmp, and is safe due to CHARS_EXTRA. */ - return memcmp(abbr, UNSPEC, sizeof UNSPEC) == 0; -} - -static int_fast32_t -detzcode(const char *const codep) -{ - register int_fast32_t result; - register int i; - int_fast32_t one = 1; - int_fast32_t halfmaxval = one << (32 - 2); - int_fast32_t maxval = halfmaxval - 1 + halfmaxval; - int_fast32_t minval = -1 - maxval; - - result = codep[0] & 0x7f; - for (i = 1; i < 4; ++i) - result = (result << 8) | (codep[i] & 0xff); - - if (codep[0] & 0x80) { - /* Do two's-complement negation even on non-two's-complement machines. - If the result would be minval - 1, return minval. */ - result -= !TWOS_COMPLEMENT(int_fast32_t) && result != 0; - result += minval; - } - return result; -} - -static int_fast64_t -detzcode64(const char *const codep) -{ - register int_fast64_t result; - register int i; - int_fast64_t one = 1; - int_fast64_t halfmaxval = one << (64 - 2); - int_fast64_t maxval = halfmaxval - 1 + halfmaxval; - int_fast64_t minval = -TWOS_COMPLEMENT(int_fast64_t) - maxval; - - result = codep[0] & 0x7f; - for (i = 1; i < 8; ++i) - result = (result << 8) | (codep[i] & 0xff); - - if (codep[0] & 0x80) { - /* Do two's-complement negation even on non-two's-complement machines. - If the result would be minval - 1, return minval. */ - result -= !TWOS_COMPLEMENT(int_fast64_t) && result != 0; - result += minval; - } - return result; -} - -static void -update_tzname_etc(struct state const *sp, struct ttinfo const *ttisp) -{ -#if HAVE_TZNAME - tzname[ttisp->tt_isdst] = (char *) &sp->chars[ttisp->tt_desigidx]; -#endif -#if USG_COMPAT - if (!ttisp->tt_isdst) - timezone = - ttisp->tt_utoff; -#endif -#if ALTZONE - if (ttisp->tt_isdst) - altzone = - ttisp->tt_utoff; -#endif -} - -/* If STDDST_MASK indicates that SP's TYPE provides useful info, - update tzname, timezone, and/or altzone and return STDDST_MASK, - diminished by the provided info if it is a specified local time. - Otherwise, return STDDST_MASK. See settzname for STDDST_MASK. */ -static int -may_update_tzname_etc(int stddst_mask, struct state *sp, int type) -{ - struct ttinfo *ttisp = &sp->ttis[type]; - int this_bit = 1 << ttisp->tt_isdst; - if (stddst_mask & this_bit) { - update_tzname_etc(sp, ttisp); - if (!ttunspecified(sp, type)) - return stddst_mask & ~this_bit; - } - return stddst_mask; -} - -static void -settzname(void) -{ - register struct state * const sp = lclptr; - register int i; - - /* If STDDST_MASK & 1 we need info about a standard time. - If STDDST_MASK & 2 we need info about a daylight saving time. - When STDDST_MASK becomes zero we can stop looking. */ - int stddst_mask = 0; - -#if HAVE_TZNAME - tzname[0] = tzname[1] = (char *) (sp ? wildabbr : utc); - stddst_mask = 3; -#endif -#if USG_COMPAT - timezone = 0; - stddst_mask = 3; -#endif -#if ALTZONE - altzone = 0; - stddst_mask |= 2; -#endif - /* - ** And to get the latest time zone abbreviations into tzname. . . - */ - if (sp) { - for (i = sp->timecnt - 1; stddst_mask && 0 <= i; i--) - stddst_mask = may_update_tzname_etc(stddst_mask, sp, sp->types[i]); - for (i = sp->typecnt - 1; stddst_mask && 0 <= i; i--) - stddst_mask = may_update_tzname_etc(stddst_mask, sp, i); - } -#if USG_COMPAT - daylight = stddst_mask >> 1 ^ 1; -#endif -} - -/* Replace bogus characters in time zone abbreviations. - Return 0 on success, an errno value if a time zone abbreviation is - too long. */ -static int -scrub_abbrs(struct state *sp) -{ - int i; - - /* Reject overlong abbreviations. */ - for (i = 0; i < sp->charcnt - (TZNAME_MAXIMUM + 1); ) { - int len = strlen(&sp->chars[i]); - if (TZNAME_MAXIMUM < len) - return EOVERFLOW; - i += len + 1; - } - - /* Replace bogus characters. */ - for (i = 0; i < sp->charcnt; ++i) - if (strchr(TZ_ABBR_CHAR_SET, sp->chars[i]) == NULL) - sp->chars[i] = TZ_ABBR_ERR_CHAR; - - return 0; -} - -/* Input buffer for data read from a compiled tz file. */ -union input_buffer { - /* The first part of the buffer, interpreted as a header. */ - struct tzhead tzhead; - - /* The entire buffer. Ideally this would have no size limits; - the following should suffice for practical use. */ - char buf[2 * sizeof(struct tzhead) + 2 * sizeof(struct state) - + 4 * TZ_MAX_TIMES]; -}; - -/* TZDIR with a trailing '/' rather than a trailing '\0'. */ -static char const tzdirslash[sizeof TZDIR] = TZDIR "/"; - -/* Local storage needed for 'tzloadbody'. */ -union local_storage { - /* The results of analyzing the file's contents after it is opened. */ - struct file_analysis { - /* The input buffer. */ - union input_buffer u; - - /* A temporary state used for parsing a TZ string in the file. */ - struct state st; - } u; - - /* The name of the file to be opened. Ideally this would have no - size limits, to support arbitrarily long Zone names. - Limiting Zone names to 1024 bytes should suffice for practical use. - However, there is no need for this to be smaller than struct - file_analysis as that struct is allocated anyway, as the other - union member. */ - char fullname[max_tz(sizeof(struct file_analysis), sizeof tzdirslash + 1024)]; -}; - -/* Load tz data from the file named NAME into *SP. Read extended - format if DOEXTEND. Use *LSP for temporary storage. Return 0 on - success, an errno value on failure. */ -static int -tzloadbody(char const *name, struct state *sp, bool doextend, - union local_storage *lsp) -{ - register int i; - register int fid; - register int stored; - register ssize_t nread; - register bool doaccess; - register union input_buffer *up = &lsp->u.u; - register int tzheadsize = sizeof(struct tzhead); - - sp->goback = sp->goahead = false; - - if (! name) { - name = TZDEFAULT; - if (! name) - return EINVAL; - } - - if (name[0] == ':') - ++name; -#ifdef SUPPRESS_TZDIR - /* Do not prepend TZDIR. This is intended for specialized - applications only, due to its security implications. */ - doaccess = true; -#else - doaccess = name[0] == '/'; -#endif - if (!doaccess) { - char const *dot; - if (sizeof lsp->fullname - sizeof tzdirslash <= strlen(name)) - return ENAMETOOLONG; - - /* Create a string "TZDIR/NAME". Using sprintf here - would pull in stdio (and would fail if the - resulting string length exceeded INT_MAX!). */ - memcpy(lsp->fullname, tzdirslash, sizeof tzdirslash); - strcpy(lsp->fullname + sizeof tzdirslash, name); - - /* Set doaccess if NAME contains a ".." file name - component, as such a name could read a file outside - the TZDIR virtual subtree. */ - for (dot = name; (dot = strchr(dot, '.')); dot++) - if ((dot == name || dot[-1] == '/') && dot[1] == '.' - && (dot[2] == '/' || !dot[2])) { - doaccess = true; - break; - } - - name = lsp->fullname; - } - if (doaccess && access(name, R_OK) != 0) - return errno; - fid = open(name, O_RDONLY | O_BINARY); - if (fid < 0) - return errno; - - nread = read(fid, up->buf, sizeof up->buf); - if (nread < tzheadsize) { - int err = nread < 0 ? errno : EINVAL; - close(fid); - return err; - } - if (close(fid) < 0) - return errno; - for (stored = 4; stored <= 8; stored *= 2) { - char version = up->tzhead.tzh_version[0]; - bool skip_datablock = stored == 4 && version; - int_fast32_t datablock_size; - int_fast32_t ttisstdcnt = detzcode(up->tzhead.tzh_ttisstdcnt); - int_fast32_t ttisutcnt = detzcode(up->tzhead.tzh_ttisutcnt); - int_fast64_t prevtr = -1; - int_fast32_t prevcorr; - int_fast32_t leapcnt = detzcode(up->tzhead.tzh_leapcnt); - int_fast32_t timecnt = detzcode(up->tzhead.tzh_timecnt); - int_fast32_t typecnt = detzcode(up->tzhead.tzh_typecnt); - int_fast32_t charcnt = detzcode(up->tzhead.tzh_charcnt); - char const *p = up->buf + tzheadsize; - /* Although tzfile(5) currently requires typecnt to be nonzero, - support future formats that may allow zero typecnt - in files that have a TZ string and no transitions. */ - if (! (0 <= leapcnt && leapcnt < TZ_MAX_LEAPS - && 0 <= typecnt && typecnt < TZ_MAX_TYPES - && 0 <= timecnt && timecnt < TZ_MAX_TIMES - && 0 <= charcnt && charcnt < TZ_MAX_CHARS - && 0 <= ttisstdcnt && ttisstdcnt < TZ_MAX_TYPES - && 0 <= ttisutcnt && ttisutcnt < TZ_MAX_TYPES)) - return EINVAL; - datablock_size - = (timecnt * stored /* ats */ - + timecnt /* types */ - + typecnt * 6 /* ttinfos */ - + charcnt /* chars */ - + leapcnt * (stored + 4) /* lsinfos */ - + ttisstdcnt /* ttisstds */ - + ttisutcnt); /* ttisuts */ - if (nread < tzheadsize + datablock_size) - return EINVAL; - if (skip_datablock) - p += datablock_size; - else { - if (! ((ttisstdcnt == typecnt || ttisstdcnt == 0) - && (ttisutcnt == typecnt || ttisutcnt == 0))) - return EINVAL; - - sp->leapcnt = leapcnt; - sp->timecnt = timecnt; - sp->typecnt = typecnt; - sp->charcnt = charcnt; - - /* Read transitions, discarding those out of time_t range. - But pretend the last transition before TIME_T_MIN - occurred at TIME_T_MIN. */ - timecnt = 0; - for (i = 0; i < sp->timecnt; ++i) { - int_fast64_t at - = stored == 4 ? detzcode(p) : detzcode64(p); - sp->types[i] = at <= TIME_T_MAX; - if (sp->types[i]) { - time_t attime - = ((TYPE_SIGNED(time_t) ? at < TIME_T_MIN : at < 0) - ? TIME_T_MIN : at); - if (timecnt && attime <= sp->ats[timecnt - 1]) { - if (attime < sp->ats[timecnt - 1]) - return EINVAL; - sp->types[i - 1] = 0; - timecnt--; - } - sp->ats[timecnt++] = attime; - } - p += stored; - } - - timecnt = 0; - for (i = 0; i < sp->timecnt; ++i) { - unsigned char typ = *p++; - if (sp->typecnt <= typ) - return EINVAL; - if (sp->types[i]) - sp->types[timecnt++] = typ; - } - sp->timecnt = timecnt; - for (i = 0; i < sp->typecnt; ++i) { - register struct ttinfo * ttisp; - unsigned char isdst, desigidx; - - ttisp = &sp->ttis[i]; - ttisp->tt_utoff = detzcode(p); - p += 4; - isdst = *p++; - if (! (isdst < 2)) - return EINVAL; - ttisp->tt_isdst = isdst; - desigidx = *p++; - if (! (desigidx < sp->charcnt)) - return EINVAL; - ttisp->tt_desigidx = desigidx; - } - for (i = 0; i < sp->charcnt; ++i) - sp->chars[i] = *p++; - /* Ensure '\0'-terminated, and make it safe to call - ttunspecified later. */ - memset(&sp->chars[i], 0, CHARS_EXTRA); - - /* Read leap seconds, discarding those out of time_t range. */ - leapcnt = 0; - for (i = 0; i < sp->leapcnt; ++i) { - int_fast64_t tr = stored == 4 ? detzcode(p) : detzcode64(p); - int_fast32_t corr = detzcode(p + stored); - p += stored + 4; - - /* Leap seconds cannot occur before the Epoch, - or out of order. */ - if (tr <= prevtr) - return EINVAL; - - /* To avoid other botches in this code, each leap second's - correction must differ from the previous one's by 1 - second or less, except that the first correction can be - any value; these requirements are more generous than - RFC 8536, to allow future RFC extensions. */ - if (! (i == 0 - || (prevcorr < corr - ? corr == prevcorr + 1 - : (corr == prevcorr - || corr == prevcorr - 1)))) - return EINVAL; - prevtr = tr; - prevcorr = corr; - - if (tr <= TIME_T_MAX) { - sp->lsis[leapcnt].ls_trans = tr; - sp->lsis[leapcnt].ls_corr = corr; - leapcnt++; - } - } - sp->leapcnt = leapcnt; - - for (i = 0; i < sp->typecnt; ++i) { - register struct ttinfo * ttisp; - - ttisp = &sp->ttis[i]; - if (ttisstdcnt == 0) - ttisp->tt_ttisstd = false; - else { - if (*p != true && *p != false) - return EINVAL; - ttisp->tt_ttisstd = *p++; - } - } - for (i = 0; i < sp->typecnt; ++i) { - register struct ttinfo * ttisp; - - ttisp = &sp->ttis[i]; - if (ttisutcnt == 0) - ttisp->tt_ttisut = false; - else { - if (*p != true && *p != false) - return EINVAL; - ttisp->tt_ttisut = *p++; - } - } - } - - nread -= p - up->buf; - memmove(up->buf, p, nread); - - /* If this is an old file, we're done. */ - if (!version) - break; - } - if (doextend && nread > 2 && - up->buf[0] == '\n' && up->buf[nread - 1] == '\n' && - sp->typecnt + 2 <= TZ_MAX_TYPES) { - struct state *ts = &lsp->u.st; - - up->buf[nread - 1] = '\0'; - if (tzparse(&up->buf[1], ts, sp)) { - - /* Attempt to reuse existing abbreviations. - Without this, America/Anchorage would be right on - the edge after 2037 when TZ_MAX_CHARS is 50, as - sp->charcnt equals 40 (for LMT AST AWT APT AHST - AHDT YST AKDT AKST) and ts->charcnt equals 10 - (for AKST AKDT). Reusing means sp->charcnt can - stay 40 in this example. */ - int gotabbr = 0; - int charcnt = sp->charcnt; - for (i = 0; i < ts->typecnt; i++) { - char *tsabbr = ts->chars + ts->ttis[i].tt_desigidx; - int j; - for (j = 0; j < charcnt; j++) - if (strcmp(sp->chars + j, tsabbr) == 0) { - ts->ttis[i].tt_desigidx = j; - gotabbr++; - break; - } - if (! (j < charcnt)) { - int tsabbrlen = strlen(tsabbr); - if (j + tsabbrlen < TZ_MAX_CHARS) { - strcpy(sp->chars + j, tsabbr); - charcnt = j + tsabbrlen + 1; - ts->ttis[i].tt_desigidx = j; - gotabbr++; - } - } - } - if (gotabbr == ts->typecnt) { - sp->charcnt = charcnt; - - /* Ignore any trailing, no-op transitions generated - by zic as they don't help here and can run afoul - of bugs in zic 2016j or earlier. */ - while (1 < sp->timecnt - && (sp->types[sp->timecnt - 1] - == sp->types[sp->timecnt - 2])) - sp->timecnt--; - - sp->goahead = ts->goahead; - - for (i = 0; i < ts->timecnt; i++) { - time_t t = ts->ats[i]; - if (increment_overflow_time(&t, leapcorr(sp, t)) - || (0 < sp->timecnt - && t <= sp->ats[sp->timecnt - 1])) - continue; - if (TZ_MAX_TIMES <= sp->timecnt) { - sp->goahead = false; - break; - } - sp->ats[sp->timecnt] = t; - sp->types[sp->timecnt] = (sp->typecnt - + ts->types[i]); - sp->timecnt++; - } - for (i = 0; i < ts->typecnt; i++) - sp->ttis[sp->typecnt++] = ts->ttis[i]; - } - } - } - if (sp->typecnt == 0) - return EINVAL; - - return 0; -} - -/* Load tz data from the file named NAME into *SP. Read extended - format if DOEXTEND. Return 0 on success, an errno value on failure. */ -static int -tzload(char const *name, struct state *sp, bool doextend) -{ -#ifdef ALL_STATE - union local_storage *lsp = malloc(sizeof *lsp); - if (!lsp) { - return HAVE_MALLOC_ERRNO ? errno : ENOMEM; - } else { - int err = tzloadbody(name, sp, doextend, lsp); - free(lsp); - return err; - } -#else - union local_storage ls; - return tzloadbody(name, sp, doextend, &ls); -#endif -} - -static const int mon_lengths[2][MONSPERYEAR] = { - { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }, - { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } -}; - -static const int year_lengths[2] = { - DAYSPERNYEAR, DAYSPERLYEAR -}; - -/* Is C an ASCII digit? */ -static bool -is_digit(char c) -{ - return '0' <= c && c <= '9'; -} - -/* -** Given a pointer into a timezone string, scan until a character that is not -** a valid character in a time zone abbreviation is found. -** Return a pointer to that character. -*/ - -ATTRIBUTE_PURE_114833 static const char * -getzname(register const char *strp) -{ - register char c; - - while ((c = *strp) != '\0' && !is_digit(c) && c != ',' && c != '-' && - c != '+') - ++strp; - return strp; -} - -/* -** Given a pointer into an extended timezone string, scan until the ending -** delimiter of the time zone abbreviation is located. -** Return a pointer to the delimiter. -** -** As with getzname above, the legal character set is actually quite -** restricted, with other characters producing undefined results. -** We don't do any checking here; checking is done later in common-case code. -*/ - -ATTRIBUTE_PURE_114833 static const char * -getqzname(register const char *strp, const int delim) -{ - register int c; - - while ((c = *strp) != '\0' && c != delim) - ++strp; - return strp; -} - -/* -** Given a pointer into a timezone string, extract a number from that string. -** Check that the number is within a specified range; if it is not, return -** NULL. -** Otherwise, return a pointer to the first character not part of the number. -*/ - -static const char * -getnum(register const char *strp, int *const nump, const int min, const int max) -{ - register char c; - register int num; - - if (strp == NULL || !is_digit(c = *strp)) - return NULL; - num = 0; - do { - num = num * 10 + (c - '0'); - if (num > max) - return NULL; /* illegal value */ - c = *++strp; - } while (is_digit(c)); - if (num < min) - return NULL; /* illegal value */ - *nump = num; - return strp; -} - -/* -** Given a pointer into a timezone string, extract a number of seconds, -** in hh[:mm[:ss]] form, from the string. -** If any error occurs, return NULL. -** Otherwise, return a pointer to the first character not part of the number -** of seconds. -*/ - -static const char * -getsecs(register const char *strp, int_fast32_t *const secsp) -{ - int num; - int_fast32_t secsperhour = SECSPERHOUR; - - /* - ** 'HOURSPERDAY * DAYSPERWEEK - 1' allows quasi-POSIX rules like - ** "M10.4.6/26", which does not conform to POSIX, - ** but which specifies the equivalent of - ** "02:00 on the first Sunday on or after 23 Oct". - */ - strp = getnum(strp, &num, 0, HOURSPERDAY * DAYSPERWEEK - 1); - if (strp == NULL) - return NULL; - *secsp = num * secsperhour; - if (*strp == ':') { - ++strp; - strp = getnum(strp, &num, 0, MINSPERHOUR - 1); - if (strp == NULL) - return NULL; - *secsp += num * SECSPERMIN; - if (*strp == ':') { - ++strp; - /* 'SECSPERMIN' allows for leap seconds. */ - strp = getnum(strp, &num, 0, SECSPERMIN); - if (strp == NULL) - return NULL; - *secsp += num; - } - } - return strp; -} - -/* -** Given a pointer into a timezone string, extract an offset, in -** [+-]hh[:mm[:ss]] form, from the string. -** If any error occurs, return NULL. -** Otherwise, return a pointer to the first character not part of the time. -*/ - -static const char * -getoffset(register const char *strp, int_fast32_t *const offsetp) -{ - register bool neg = false; - - if (*strp == '-') { - neg = true; - ++strp; - } else if (*strp == '+') - ++strp; - strp = getsecs(strp, offsetp); - if (strp == NULL) - return NULL; /* illegal time */ - if (neg) - *offsetp = -*offsetp; - return strp; -} - -/* -** Given a pointer into a timezone string, extract a rule in the form -** date[/time]. See POSIX Base Definitions section 8.3 variable TZ -** for the format of "date" and "time". -** If a valid rule is not found, return NULL. -** Otherwise, return a pointer to the first character not part of the rule. -*/ - -static const char * -getrule(const char *strp, register struct rule *const rulep) -{ - if (*strp == 'J') { - /* - ** Julian day. - */ - rulep->r_type = JULIAN_DAY; - ++strp; - strp = getnum(strp, &rulep->r_day, 1, DAYSPERNYEAR); - } else if (*strp == 'M') { - /* - ** Month, week, day. - */ - rulep->r_type = MONTH_NTH_DAY_OF_WEEK; - ++strp; - strp = getnum(strp, &rulep->r_mon, 1, MONSPERYEAR); - if (strp == NULL) - return NULL; - if (*strp++ != '.') - return NULL; - strp = getnum(strp, &rulep->r_week, 1, 5); - if (strp == NULL) - return NULL; - if (*strp++ != '.') - return NULL; - strp = getnum(strp, &rulep->r_day, 0, DAYSPERWEEK - 1); - } else if (is_digit(*strp)) { - /* - ** Day of year. - */ - rulep->r_type = DAY_OF_YEAR; - strp = getnum(strp, &rulep->r_day, 0, DAYSPERLYEAR - 1); - } else return NULL; /* invalid format */ - if (strp == NULL) - return NULL; - if (*strp == '/') { - /* - ** Time specified. - */ - ++strp; - strp = getoffset(strp, &rulep->r_time); - } else rulep->r_time = 2 * SECSPERHOUR; /* default = 2:00:00 */ - return strp; -} - -/* -** Given a year, a rule, and the offset from UT at the time that rule takes -** effect, calculate the year-relative time that rule takes effect. -*/ - -static int_fast32_t -transtime(const int year, register const struct rule *const rulep, - const int_fast32_t offset) -{ - register bool leapyear; - register int_fast32_t value; - register int i; - int d, m1, yy0, yy1, yy2, dow; - - leapyear = isleap(year); - switch (rulep->r_type) { - - case JULIAN_DAY: - /* - ** Jn - Julian day, 1 == January 1, 60 == March 1 even in leap - ** years. - ** In non-leap years, or if the day number is 59 or less, just - ** add SECSPERDAY times the day number-1 to the time of - ** January 1, midnight, to get the day. - */ - value = (rulep->r_day - 1) * SECSPERDAY; - if (leapyear && rulep->r_day >= 60) - value += SECSPERDAY; - break; - - case DAY_OF_YEAR: - /* - ** n - day of year. - ** Just add SECSPERDAY times the day number to the time of - ** January 1, midnight, to get the day. - */ - value = rulep->r_day * SECSPERDAY; - break; - - case MONTH_NTH_DAY_OF_WEEK: - /* - ** Mm.n.d - nth "dth day" of month m. - */ - - /* - ** Use Zeller's Congruence to get day-of-week of first day of - ** month. - */ - m1 = (rulep->r_mon + 9) % 12 + 1; - yy0 = (rulep->r_mon <= 2) ? (year - 1) : year; - yy1 = yy0 / 100; - yy2 = yy0 % 100; - dow = ((26 * m1 - 2) / 10 + - 1 + yy2 + yy2 / 4 + yy1 / 4 - 2 * yy1) % 7; - if (dow < 0) - dow += DAYSPERWEEK; - - /* - ** "dow" is the day-of-week of the first day of the month. Get - ** the day-of-month (zero-origin) of the first "dow" day of the - ** month. - */ - d = rulep->r_day - dow; - if (d < 0) - d += DAYSPERWEEK; - for (i = 1; i < rulep->r_week; ++i) { - if (d + DAYSPERWEEK >= - mon_lengths[leapyear][rulep->r_mon - 1]) - break; - d += DAYSPERWEEK; - } - - /* - ** "d" is the day-of-month (zero-origin) of the day we want. - */ - value = d * SECSPERDAY; - for (i = 0; i < rulep->r_mon - 1; ++i) - value += mon_lengths[leapyear][i] * SECSPERDAY; - break; - - default: unreachable(); - } - - /* - ** "value" is the year-relative time of 00:00:00 UT on the day in - ** question. To get the year-relative time of the specified local - ** time on that day, add the transition time and the current offset - ** from UT. - */ - return value + rulep->r_time + offset; -} - -/* -** Given a POSIX.1 proleptic TZ string, fill in the rule tables as -** appropriate. -*/ - -static bool -tzparse(const char *name, struct state *sp, struct state const *basep) -{ - const char * stdname; - const char * dstname; - int_fast32_t stdoffset; - int_fast32_t dstoffset; - register char * cp; - register bool load_ok; - ptrdiff_t stdlen, dstlen, charcnt; - time_t atlo = TIME_T_MIN, leaplo = TIME_T_MIN; - - stdname = name; - if (*name == '<') { - name++; - stdname = name; - name = getqzname(name, '>'); - if (*name != '>') - return false; - stdlen = name - stdname; - name++; - } else { - name = getzname(name); - stdlen = name - stdname; - } - if (! (0 < stdlen && stdlen <= TZNAME_MAXIMUM)) - return false; - name = getoffset(name, &stdoffset); - if (name == NULL) - return false; - charcnt = stdlen + 1; - if (basep) { - if (0 < basep->timecnt) - atlo = basep->ats[basep->timecnt - 1]; - load_ok = false; - sp->leapcnt = basep->leapcnt; - memcpy(sp->lsis, basep->lsis, sp->leapcnt * sizeof *sp->lsis); - } else { - load_ok = tzload(TZDEFRULES, sp, false) == 0; - if (!load_ok) - sp->leapcnt = 0; /* So, we're off a little. */ - } - if (0 < sp->leapcnt) - leaplo = sp->lsis[sp->leapcnt - 1].ls_trans; - sp->goback = sp->goahead = false; - if (*name != '\0') { - if (*name == '<') { - dstname = ++name; - name = getqzname(name, '>'); - if (*name != '>') - return false; - dstlen = name - dstname; - name++; - } else { - dstname = name; - name = getzname(name); - dstlen = name - dstname; /* length of DST abbr. */ - } - if (! (0 < dstlen && dstlen <= TZNAME_MAXIMUM)) - return false; - charcnt += dstlen + 1; - if (*name != '\0' && *name != ',' && *name != ';') { - name = getoffset(name, &dstoffset); - if (name == NULL) - return false; - } else dstoffset = stdoffset - SECSPERHOUR; - if (*name == '\0' && !load_ok) - name = TZDEFRULESTRING; - if (*name == ',' || *name == ';') { - struct rule start; - struct rule end; - register int year; - register int timecnt; - time_t janfirst; - int_fast32_t janoffset = 0; - int yearbeg, yearlim; - - ++name; - if ((name = getrule(name, &start)) == NULL) - return false; - if (*name++ != ',') - return false; - if ((name = getrule(name, &end)) == NULL) - return false; - if (*name != '\0') - return false; - sp->typecnt = 2; /* standard time and DST */ - /* - ** Two transitions per year, from EPOCH_YEAR forward. - */ - init_ttinfo(&sp->ttis[0], -stdoffset, false, 0); - init_ttinfo(&sp->ttis[1], -dstoffset, true, stdlen + 1); - timecnt = 0; - janfirst = 0; - yearbeg = EPOCH_YEAR; - - do { - int_fast32_t yearsecs - = year_lengths[isleap(yearbeg - 1)] * SECSPERDAY; - time_t janfirst1 = janfirst; - yearbeg--; - if (increment_overflow_time(&janfirst1, -yearsecs)) { - janoffset = -yearsecs; - break; - } - janfirst = janfirst1; - } while (atlo < janfirst - && EPOCH_YEAR - YEARSPERREPEAT / 2 < yearbeg); - - while (true) { - int_fast32_t yearsecs - = year_lengths[isleap(yearbeg)] * SECSPERDAY; - int yearbeg1 = yearbeg; - time_t janfirst1 = janfirst; - if (increment_overflow_time(&janfirst1, yearsecs) - || increment_overflow(&yearbeg1, 1) - || atlo <= janfirst1) - break; - yearbeg = yearbeg1; - janfirst = janfirst1; - } - - yearlim = yearbeg; - if (increment_overflow(&yearlim, years_of_observations)) - yearlim = INT_MAX; - for (year = yearbeg; year < yearlim; year++) { - int_fast32_t - starttime = transtime(year, &start, stdoffset), - endtime = transtime(year, &end, dstoffset); - int_fast32_t - yearsecs = (year_lengths[isleap(year)] - * SECSPERDAY); - bool reversed = endtime < starttime; - if (reversed) { - int_fast32_t swap = starttime; - starttime = endtime; - endtime = swap; - } - if (reversed - || (starttime < endtime - && endtime - starttime < yearsecs)) { - if (TZ_MAX_TIMES - 2 < timecnt) - break; - sp->ats[timecnt] = janfirst; - if (! increment_overflow_time - (&sp->ats[timecnt], - janoffset + starttime) - && atlo <= sp->ats[timecnt]) - sp->types[timecnt++] = !reversed; - sp->ats[timecnt] = janfirst; - if (! increment_overflow_time - (&sp->ats[timecnt], - janoffset + endtime) - && atlo <= sp->ats[timecnt]) { - sp->types[timecnt++] = reversed; - } - } - if (endtime < leaplo) { - yearlim = year; - if (increment_overflow(&yearlim, - years_of_observations)) - yearlim = INT_MAX; - } - if (increment_overflow_time - (&janfirst, janoffset + yearsecs)) - break; - janoffset = 0; - } - sp->timecnt = timecnt; - if (! timecnt) { - sp->ttis[0] = sp->ttis[1]; - sp->typecnt = 1; /* Perpetual DST. */ - } else if (years_of_observations <= year - yearbeg) - sp->goback = sp->goahead = true; - } else { - register int_fast32_t theirstdoffset; - register int_fast32_t theirdstoffset; - register int_fast32_t theiroffset; - register bool isdst; - register int i; - register int j; - - if (*name != '\0') - return false; - /* - ** Initial values of theirstdoffset and theirdstoffset. - */ - theirstdoffset = 0; - for (i = 0; i < sp->timecnt; ++i) { - j = sp->types[i]; - if (!sp->ttis[j].tt_isdst) { - theirstdoffset = - - sp->ttis[j].tt_utoff; - break; - } - } - theirdstoffset = 0; - for (i = 0; i < sp->timecnt; ++i) { - j = sp->types[i]; - if (sp->ttis[j].tt_isdst) { - theirdstoffset = - - sp->ttis[j].tt_utoff; - break; - } - } - /* - ** Initially we're assumed to be in standard time. - */ - isdst = false; - /* - ** Now juggle transition times and types - ** tracking offsets as you do. - */ - for (i = 0; i < sp->timecnt; ++i) { - j = sp->types[i]; - sp->types[i] = sp->ttis[j].tt_isdst; - if (sp->ttis[j].tt_ttisut) { - /* No adjustment to transition time */ - } else { - /* - ** If daylight saving time is in - ** effect, and the transition time was - ** not specified as standard time, add - ** the daylight saving time offset to - ** the transition time; otherwise, add - ** the standard time offset to the - ** transition time. - */ - /* - ** Transitions from DST to DDST - ** will effectively disappear since - ** proleptic TZ strings have only one - ** DST offset. - */ - if (isdst && !sp->ttis[j].tt_ttisstd) { - sp->ats[i] += dstoffset - - theirdstoffset; - } else { - sp->ats[i] += stdoffset - - theirstdoffset; - } - } - theiroffset = -sp->ttis[j].tt_utoff; - if (sp->ttis[j].tt_isdst) - theirdstoffset = theiroffset; - else theirstdoffset = theiroffset; - } - /* - ** Finally, fill in ttis. - */ - init_ttinfo(&sp->ttis[0], -stdoffset, false, 0); - init_ttinfo(&sp->ttis[1], -dstoffset, true, stdlen + 1); - sp->typecnt = 2; - } - } else { - dstlen = 0; - sp->typecnt = 1; /* only standard time */ - sp->timecnt = 0; - init_ttinfo(&sp->ttis[0], -stdoffset, false, 0); - } - sp->charcnt = charcnt; - cp = sp->chars; - memcpy(cp, stdname, stdlen); - cp += stdlen; - *cp++ = '\0'; - if (dstlen != 0) { - memcpy(cp, dstname, dstlen); - *(cp + dstlen) = '\0'; - } - return true; -} - -static void -gmtload(struct state *const sp) -{ - if (tzload(etc_utc, sp, true) != 0) - tzparse("UTC0", sp, NULL); -} - -/* Initialize *SP to a value appropriate for the TZ setting NAME. - Return 0 on success, an errno value on failure. */ -static int -zoneinit(struct state *sp, char const *name) -{ - if (name && ! name[0]) { - /* - ** User wants it fast rather than right. - */ - sp->leapcnt = 0; /* so, we're off a little */ - sp->timecnt = 0; - sp->typecnt = 0; - sp->charcnt = 0; - sp->goback = sp->goahead = false; - init_ttinfo(&sp->ttis[0], 0, false, 0); - strcpy(sp->chars, utc); - return 0; - } else { - int err = tzload(name, sp, true); - if (err != 0 && name && name[0] != ':' && tzparse(name, sp, NULL)) - err = 0; - if (err == 0) - err = scrub_abbrs(sp); - return err; - } -} - -static void -tzset_unlocked(void) -{ - char const *name = getenv("TZ"); - struct state *sp = lclptr; - int lcl = name ? strlen(name) < sizeof lcl_TZname : -1; - if (lcl < 0 - ? lcl_is_set < 0 - : 0 < lcl_is_set && strcmp(lcl_TZname, name) == 0) - return; -#ifdef ALL_STATE - if (! sp) - lclptr = sp = malloc(sizeof *lclptr); -#endif /* defined ALL_STATE */ - if (sp) { - if (zoneinit(sp, name) != 0) - zoneinit(sp, ""); - if (0 < lcl) - strcpy(lcl_TZname, name); - } - settzname(); - lcl_is_set = lcl; -} - -void -tzset(void) -{ - if (lock() != 0) - return; - tzset_unlocked(); - unlock(); -} - -static void -gmtcheck(void) -{ - static bool gmt_is_set; - if (lock() != 0) - return; - if (! gmt_is_set) { -#ifdef ALL_STATE - gmtptr = malloc(sizeof *gmtptr); -#endif - if (gmtptr) - gmtload(gmtptr); - gmt_is_set = true; - } - unlock(); -} - -#if NETBSD_INSPIRED - -timezone_t -tzalloc(char const *name) -{ - timezone_t sp = malloc(sizeof *sp); - if (sp) { - int err = zoneinit(sp, name); - if (err != 0) { - free(sp); - errno = err; - return NULL; - } - } else if (!HAVE_MALLOC_ERRNO) - errno = ENOMEM; - return sp; -} - -void -tzfree(timezone_t sp) -{ - free(sp); -} - -/* -** NetBSD 6.1.4 has ctime_rz, but omit it because C23 deprecates ctime and -** POSIX.1-2024 removes ctime_r. Both have potential security problems that -** ctime_rz would share. Callers can instead use localtime_rz + strftime. -** -** NetBSD 6.1.4 has tzgetname, but omit it because it doesn't work -** in zones with three or more time zone abbreviations. -** Callers can instead use localtime_rz + strftime. -*/ - -#endif - -/* -** The easy way to behave "as if no library function calls" localtime -** is to not call it, so we drop its guts into "localsub", which can be -** freely called. (And no, the PANS doesn't require the above behavior, -** but it *is* desirable.) -** -** If successful and SETNAME is nonzero, -** set the applicable parts of tzname, timezone and altzone; -** however, it's OK to omit this step for proleptic TZ strings -** since in that case tzset should have already done this step correctly. -** SETNAME's type is int_fast32_t for compatibility with gmtsub, -** but it is actually a boolean and its value should be 0 or 1. -*/ - -/*ARGSUSED*/ -static struct tm * -localsub(struct state const *sp, time_t const *timep, int_fast32_t setname, - struct tm *const tmp) -{ - register const struct ttinfo * ttisp; - register int i; - register struct tm * result; - const time_t t = *timep; - - if (sp == NULL) { - /* Don't bother to set tzname etc.; tzset has already done it. */ - return gmtsub(gmtptr, timep, 0, tmp); - } - if ((sp->goback && t < sp->ats[0]) || - (sp->goahead && t > sp->ats[sp->timecnt - 1])) { - time_t newt; - register time_t seconds; - register time_t years; - - if (t < sp->ats[0]) - seconds = sp->ats[0] - t; - else seconds = t - sp->ats[sp->timecnt - 1]; - --seconds; - - /* Beware integer overflow, as SECONDS might - be close to the maximum time_t. */ - years = seconds / SECSPERREPEAT * YEARSPERREPEAT; - seconds = years * AVGSECSPERYEAR; - years += YEARSPERREPEAT; - if (t < sp->ats[0]) - newt = t + seconds + SECSPERREPEAT; - else - newt = t - seconds - SECSPERREPEAT; - - if (newt < sp->ats[0] || - newt > sp->ats[sp->timecnt - 1]) - return NULL; /* "cannot happen" */ - result = localsub(sp, &newt, setname, tmp); - if (result) { -#if defined ckd_add && defined ckd_sub - if (t < sp->ats[0] - ? ckd_sub(&result->tm_year, - result->tm_year, years) - : ckd_add(&result->tm_year, - result->tm_year, years)) - return NULL; -#else - register int_fast64_t newy; - - newy = result->tm_year; - if (t < sp->ats[0]) - newy -= years; - else newy += years; - if (! (INT_MIN <= newy && newy <= INT_MAX)) - return NULL; - result->tm_year = newy; -#endif - } - return result; - } - if (sp->timecnt == 0 || t < sp->ats[0]) { - i = 0; - } else { - register int lo = 1; - register int hi = sp->timecnt; - - while (lo < hi) { - register int mid = (lo + hi) >> 1; - - if (t < sp->ats[mid]) - hi = mid; - else lo = mid + 1; - } - i = sp->types[lo - 1]; - } - ttisp = &sp->ttis[i]; - /* - ** To get (wrong) behavior that's compatible with System V Release 2.0 - ** you'd replace the statement below with - ** t += ttisp->tt_utoff; - ** timesub(&t, 0L, sp, tmp); - */ - result = timesub(&t, ttisp->tt_utoff, sp, tmp); - if (result) { - result->tm_isdst = ttisp->tt_isdst; -#ifdef TM_ZONE - result->TM_ZONE = (char *) &sp->chars[ttisp->tt_desigidx]; -#endif /* defined TM_ZONE */ - if (setname) - update_tzname_etc(sp, ttisp); - } - return result; -} - -#if NETBSD_INSPIRED - -struct tm * -localtime_rz(struct state *sp, time_t const *timep, - struct tm *tmp) -{ - return localsub(sp, timep, 0, tmp); -} - -#endif - -static struct tm * -localtime_tzset(time_t const *timep, struct tm *tmp, bool setname) -{ - int err = lock(); - if (err) { - errno = err; - return NULL; - } - if (setname || !lcl_is_set) - tzset_unlocked(); - tmp = localsub(lclptr, timep, setname, tmp); - unlock(); - return tmp; -} - -struct tm * -localtime(const time_t *timep) -{ -#if !SUPPORT_C89 - static struct tm tm; -#endif - return localtime_tzset(timep, &tm, true); -} - -struct tm * -localtime_r(const time_t *restrict timep, struct tm *restrict tmp) -{ - return localtime_tzset(timep, tmp, false); -} - -/* -** gmtsub is to gmtime as localsub is to localtime. -*/ - -static struct tm * -gmtsub(ATTRIBUTE_MAYBE_UNUSED struct state const *sp, time_t const *timep, - int_fast32_t offset, struct tm *tmp) -{ - register struct tm * result; - - result = timesub(timep, offset, gmtptr, tmp); -#ifdef TM_ZONE - /* - ** Could get fancy here and deliver something such as - ** "+xx" or "-xx" if offset is non-zero, - ** but this is no time for a treasure hunt. - */ - tmp->TM_ZONE = ((char *) - (offset ? wildabbr : gmtptr ? gmtptr->chars : utc)); -#endif /* defined TM_ZONE */ - return result; -} - -/* -* Re-entrant version of gmtime. -*/ - -struct tm * -gmtime_r(time_t const *restrict timep, struct tm *restrict tmp) -{ - gmtcheck(); - return gmtsub(gmtptr, timep, 0, tmp); -} - -struct tm * -gmtime(const time_t *timep) -{ -#if !SUPPORT_C89 - static struct tm tm; -#endif - return gmtime_r(timep, &tm); -} - -#if STD_INSPIRED - -/* This function is obsolescent and may disappear in future releases. - Callers can instead use localtime_rz with a fixed-offset zone. */ - -struct tm * -offtime(const time_t *timep, long offset) -{ - gmtcheck(); - -#if !SUPPORT_C89 - static struct tm tm; -#endif - return gmtsub(gmtptr, timep, offset, &tm); -} - -#endif - -/* -** Return the number of leap years through the end of the given year -** where, to make the math easy, the answer for year zero is defined as zero. -*/ - -static time_t -leaps_thru_end_of_nonneg(time_t y) -{ - return y / 4 - y / 100 + y / 400; -} - -static time_t -leaps_thru_end_of(time_t y) -{ - return (y < 0 - ? -1 - leaps_thru_end_of_nonneg(-1 - y) - : leaps_thru_end_of_nonneg(y)); -} - -static struct tm * -timesub(const time_t *timep, int_fast32_t offset, - const struct state *sp, struct tm *tmp) -{ - register const struct lsinfo * lp; - register time_t tdays; - register const int * ip; - register int_fast32_t corr; - register int i; - int_fast32_t idays, rem, dayoff, dayrem; - time_t y; - - /* If less than SECSPERMIN, the number of seconds since the - most recent positive leap second; otherwise, do not add 1 - to localtime tm_sec because of leap seconds. */ - time_t secs_since_posleap = SECSPERMIN; - - corr = 0; - i = (sp == NULL) ? 0 : sp->leapcnt; - while (--i >= 0) { - lp = &sp->lsis[i]; - if (*timep >= lp->ls_trans) { - corr = lp->ls_corr; - if ((i == 0 ? 0 : lp[-1].ls_corr) < corr) - secs_since_posleap = *timep - lp->ls_trans; - break; - } - } - - /* Calculate the year, avoiding integer overflow even if - time_t is unsigned. */ - tdays = *timep / SECSPERDAY; - rem = *timep % SECSPERDAY; - rem += offset % SECSPERDAY - corr % SECSPERDAY + 3 * SECSPERDAY; - dayoff = offset / SECSPERDAY - corr / SECSPERDAY + rem / SECSPERDAY - 3; - rem %= SECSPERDAY; - /* y = (EPOCH_YEAR - + floor((tdays + dayoff) / DAYSPERREPEAT) * YEARSPERREPEAT), - sans overflow. But calculate against 1570 (EPOCH_YEAR - - YEARSPERREPEAT) instead of against 1970 so that things work - for localtime values before 1970 when time_t is unsigned. */ - dayrem = tdays % DAYSPERREPEAT; - dayrem += dayoff % DAYSPERREPEAT; - y = (EPOCH_YEAR - YEARSPERREPEAT - + ((1 + dayoff / DAYSPERREPEAT + dayrem / DAYSPERREPEAT - - ((dayrem % DAYSPERREPEAT) < 0) - + tdays / DAYSPERREPEAT) - * YEARSPERREPEAT)); - /* idays = (tdays + dayoff) mod DAYSPERREPEAT, sans overflow. */ - idays = tdays % DAYSPERREPEAT; - idays += dayoff % DAYSPERREPEAT + 2 * DAYSPERREPEAT; - idays %= DAYSPERREPEAT; - /* Increase Y and decrease IDAYS until IDAYS is in range for Y. */ - while (year_lengths[isleap(y)] <= idays) { - int tdelta = idays / DAYSPERLYEAR; - int_fast32_t ydelta = tdelta + !tdelta; - time_t newy = y + ydelta; - register int leapdays; - leapdays = leaps_thru_end_of(newy - 1) - - leaps_thru_end_of(y - 1); - idays -= ydelta * DAYSPERNYEAR; - idays -= leapdays; - y = newy; - } - -#ifdef ckd_add - if (ckd_add(&tmp->tm_year, y, -TM_YEAR_BASE)) { - errno = EOVERFLOW; - return NULL; - } -#else - if (!TYPE_SIGNED(time_t) && y < TM_YEAR_BASE) { - int signed_y = y; - tmp->tm_year = signed_y - TM_YEAR_BASE; - } else if ((!TYPE_SIGNED(time_t) || INT_MIN + TM_YEAR_BASE <= y) - && y - TM_YEAR_BASE <= INT_MAX) - tmp->tm_year = y - TM_YEAR_BASE; - else { - errno = EOVERFLOW; - return NULL; - } -#endif - tmp->tm_yday = idays; - /* - ** The "extra" mods below avoid overflow problems. - */ - tmp->tm_wday = (TM_WDAY_BASE - + ((tmp->tm_year % DAYSPERWEEK) - * (DAYSPERNYEAR % DAYSPERWEEK)) - + leaps_thru_end_of(y - 1) - - leaps_thru_end_of(TM_YEAR_BASE - 1) - + idays); - tmp->tm_wday %= DAYSPERWEEK; - if (tmp->tm_wday < 0) - tmp->tm_wday += DAYSPERWEEK; - tmp->tm_hour = rem / SECSPERHOUR; - rem %= SECSPERHOUR; - tmp->tm_min = rem / SECSPERMIN; - tmp->tm_sec = rem % SECSPERMIN; - - /* Use "... ??:??:60" at the end of the localtime minute containing - the second just before the positive leap second. */ - tmp->tm_sec += secs_since_posleap <= tmp->tm_sec; - - ip = mon_lengths[isleap(y)]; - for (tmp->tm_mon = 0; idays >= ip[tmp->tm_mon]; ++(tmp->tm_mon)) - idays -= ip[tmp->tm_mon]; - tmp->tm_mday = idays + 1; - tmp->tm_isdst = 0; -#ifdef TM_GMTOFF - tmp->TM_GMTOFF = offset; -#endif /* defined TM_GMTOFF */ - return tmp; -} - -/* -** Adapted from code provided by Robert Elz, who writes: -** The "best" way to do mktime I think is based on an idea of Bob -** Kridle's (so its said...) from a long time ago. -** It does a binary search of the time_t space. Since time_t's are -** just 32 bits, its a max of 32 iterations (even at 64 bits it -** would still be very reasonable). -*/ - -#ifndef WRONG -# define WRONG (-1) -#endif /* !defined WRONG */ - -/* -** Normalize logic courtesy Paul Eggert. -*/ - -static bool -increment_overflow(int *ip, int j) -{ -#ifdef ckd_add - return ckd_add(ip, *ip, j); -#else - register int const i = *ip; - - /* - ** If i >= 0 there can only be overflow if i + j > INT_MAX - ** or if j > INT_MAX - i; given i >= 0, INT_MAX - i cannot overflow. - ** If i < 0 there can only be overflow if i + j < INT_MIN - ** or if j < INT_MIN - i; given i < 0, INT_MIN - i cannot overflow. - */ - if ((i >= 0) ? (j > INT_MAX - i) : (j < INT_MIN - i)) - return true; - *ip += j; - return false; -#endif -} - -static bool -increment_overflow32(int_fast32_t *const lp, int const m) -{ -#ifdef ckd_add - return ckd_add(lp, *lp, m); -#else - register int_fast32_t const l = *lp; - - if ((l >= 0) ? (m > INT_FAST32_MAX - l) : (m < INT_FAST32_MIN - l)) - return true; - *lp += m; - return false; -#endif -} - -static bool -increment_overflow_time(time_t *tp, int_fast32_t j) -{ -#ifdef ckd_add - return ckd_add(tp, *tp, j); -#else - /* - ** This is like - ** 'if (! (TIME_T_MIN <= *tp + j && *tp + j <= TIME_T_MAX)) ...', - ** except that it does the right thing even if *tp + j would overflow. - */ - if (! (j < 0 - ? (TYPE_SIGNED(time_t) ? TIME_T_MIN - j <= *tp : -1 - j < *tp) - : *tp <= TIME_T_MAX - j)) - return true; - *tp += j; - return false; -#endif -} - -static bool -normalize_overflow(int *const tensptr, int *const unitsptr, const int base) -{ - register int tensdelta; - - tensdelta = (*unitsptr >= 0) ? - (*unitsptr / base) : - (-1 - (-1 - *unitsptr) / base); - *unitsptr -= tensdelta * base; - return increment_overflow(tensptr, tensdelta); -} - -static bool -normalize_overflow32(int_fast32_t *tensptr, int *unitsptr, int base) -{ - register int tensdelta; - - tensdelta = (*unitsptr >= 0) ? - (*unitsptr / base) : - (-1 - (-1 - *unitsptr) / base); - *unitsptr -= tensdelta * base; - return increment_overflow32(tensptr, tensdelta); -} - -static int -tmcomp(register const struct tm *const atmp, - register const struct tm *const btmp) -{ - register int result; - - if (atmp->tm_year != btmp->tm_year) - return atmp->tm_year < btmp->tm_year ? -1 : 1; - if ((result = (atmp->tm_mon - btmp->tm_mon)) == 0 && - (result = (atmp->tm_mday - btmp->tm_mday)) == 0 && - (result = (atmp->tm_hour - btmp->tm_hour)) == 0 && - (result = (atmp->tm_min - btmp->tm_min)) == 0) - result = atmp->tm_sec - btmp->tm_sec; - return result; -} - -/* Copy to *DEST from *SRC. Copy only the members needed for mktime, - as other members might not be initialized. */ -static void -mktmcpy(struct tm *dest, struct tm const *src) -{ - dest->tm_sec = src->tm_sec; - dest->tm_min = src->tm_min; - dest->tm_hour = src->tm_hour; - dest->tm_mday = src->tm_mday; - dest->tm_mon = src->tm_mon; - dest->tm_year = src->tm_year; - dest->tm_isdst = src->tm_isdst; -#if defined TM_GMTOFF && ! UNINIT_TRAP - dest->TM_GMTOFF = src->TM_GMTOFF; -#endif -} - -static time_t -time2sub(struct tm *const tmp, - struct tm *(*funcp)(struct state const *, time_t const *, - int_fast32_t, struct tm *), - struct state const *sp, - const int_fast32_t offset, - bool *okayp, - bool do_norm_secs) -{ - register int dir; - register int i, j; - register int saved_seconds; - register int_fast32_t li; - register time_t lo; - register time_t hi; - int_fast32_t y; - time_t newt; - time_t t; - struct tm yourtm, mytm; - - *okayp = false; - mktmcpy(&yourtm, tmp); - - if (do_norm_secs) { - if (normalize_overflow(&yourtm.tm_min, &yourtm.tm_sec, - SECSPERMIN)) - return WRONG; - } - if (normalize_overflow(&yourtm.tm_hour, &yourtm.tm_min, MINSPERHOUR)) - return WRONG; - if (normalize_overflow(&yourtm.tm_mday, &yourtm.tm_hour, HOURSPERDAY)) - return WRONG; - y = yourtm.tm_year; - if (normalize_overflow32(&y, &yourtm.tm_mon, MONSPERYEAR)) - return WRONG; - /* - ** Turn y into an actual year number for now. - ** It is converted back to an offset from TM_YEAR_BASE later. - */ - if (increment_overflow32(&y, TM_YEAR_BASE)) - return WRONG; - while (yourtm.tm_mday <= 0) { - if (increment_overflow32(&y, -1)) - return WRONG; - li = y + (1 < yourtm.tm_mon); - yourtm.tm_mday += year_lengths[isleap(li)]; - } - while (yourtm.tm_mday > DAYSPERLYEAR) { - li = y + (1 < yourtm.tm_mon); - yourtm.tm_mday -= year_lengths[isleap(li)]; - if (increment_overflow32(&y, 1)) - return WRONG; - } - for ( ; ; ) { - i = mon_lengths[isleap(y)][yourtm.tm_mon]; - if (yourtm.tm_mday <= i) - break; - yourtm.tm_mday -= i; - if (++yourtm.tm_mon >= MONSPERYEAR) { - yourtm.tm_mon = 0; - if (increment_overflow32(&y, 1)) - return WRONG; - } - } -#ifdef ckd_add - if (ckd_add(&yourtm.tm_year, y, -TM_YEAR_BASE)) - return WRONG; -#else - if (increment_overflow32(&y, -TM_YEAR_BASE)) - return WRONG; - if (! (INT_MIN <= y && y <= INT_MAX)) - return WRONG; - yourtm.tm_year = y; -#endif - if (yourtm.tm_sec >= 0 && yourtm.tm_sec < SECSPERMIN) - saved_seconds = 0; - else if (yourtm.tm_year < EPOCH_YEAR - TM_YEAR_BASE) { - /* - ** We can't set tm_sec to 0, because that might push the - ** time below the minimum representable time. - ** Set tm_sec to 59 instead. - ** This assumes that the minimum representable time is - ** not in the same minute that a leap second was deleted from, - ** which is a safer assumption than using 58 would be. - */ - if (increment_overflow(&yourtm.tm_sec, 1 - SECSPERMIN)) - return WRONG; - saved_seconds = yourtm.tm_sec; - yourtm.tm_sec = SECSPERMIN - 1; - } else { - saved_seconds = yourtm.tm_sec; - yourtm.tm_sec = 0; - } - /* - ** Do a binary search (this works whatever time_t's type is). - */ - lo = TIME_T_MIN; - hi = TIME_T_MAX; - for ( ; ; ) { - t = lo / 2 + hi / 2; - if (t < lo) - t = lo; - else if (t > hi) - t = hi; - if (! funcp(sp, &t, offset, &mytm)) { - /* - ** Assume that t is too extreme to be represented in - ** a struct tm; arrange things so that it is less - ** extreme on the next pass. - */ - dir = (t > 0) ? 1 : -1; - } else dir = tmcomp(&mytm, &yourtm); - if (dir != 0) { - if (t == lo) { - if (t == TIME_T_MAX) - return WRONG; - ++t; - ++lo; - } else if (t == hi) { - if (t == TIME_T_MIN) - return WRONG; - --t; - --hi; - } - if (lo > hi) - return WRONG; - if (dir > 0) - hi = t; - else lo = t; - continue; - } -#if defined TM_GMTOFF && ! UNINIT_TRAP - if (mytm.TM_GMTOFF != yourtm.TM_GMTOFF - && (yourtm.TM_GMTOFF < 0 - ? (-SECSPERDAY <= yourtm.TM_GMTOFF - && (mytm.TM_GMTOFF <= - (min_tz(INT_FAST32_MAX, LONG_MAX) - + yourtm.TM_GMTOFF))) - : (yourtm.TM_GMTOFF <= SECSPERDAY - && ((max_tz(INT_FAST32_MIN, LONG_MIN) - + yourtm.TM_GMTOFF) - <= mytm.TM_GMTOFF)))) { - /* MYTM matches YOURTM except with the wrong UT offset. - YOURTM.TM_GMTOFF is plausible, so try it instead. - It's OK if YOURTM.TM_GMTOFF contains uninitialized data, - since the guess gets checked. */ - time_t altt = t; - int_fast32_t diff = mytm.TM_GMTOFF - yourtm.TM_GMTOFF; - if (!increment_overflow_time(&altt, diff)) { - struct tm alttm; - if (funcp(sp, &altt, offset, &alttm) - && alttm.tm_isdst == mytm.tm_isdst - && alttm.TM_GMTOFF == yourtm.TM_GMTOFF - && tmcomp(&alttm, &yourtm) == 0) { - t = altt; - mytm = alttm; - } - } - } -#endif - if (yourtm.tm_isdst < 0 || mytm.tm_isdst == yourtm.tm_isdst) - break; - /* - ** Right time, wrong type. - ** Hunt for right time, right type. - ** It's okay to guess wrong since the guess - ** gets checked. - */ - if (sp == NULL) - return WRONG; - for (i = sp->typecnt - 1; i >= 0; --i) { - if (sp->ttis[i].tt_isdst != yourtm.tm_isdst) - continue; - for (j = sp->typecnt - 1; j >= 0; --j) { - if (sp->ttis[j].tt_isdst == yourtm.tm_isdst) - continue; - if (ttunspecified(sp, j)) - continue; - newt = (t + sp->ttis[j].tt_utoff - - sp->ttis[i].tt_utoff); - if (! funcp(sp, &newt, offset, &mytm)) - continue; - if (tmcomp(&mytm, &yourtm) != 0) - continue; - if (mytm.tm_isdst != yourtm.tm_isdst) - continue; - /* - ** We have a match. - */ - t = newt; - goto label; - } - } - return WRONG; - } - label: - newt = t + saved_seconds; - if ((newt < t) != (saved_seconds < 0)) - return WRONG; - t = newt; - if (funcp(sp, &t, offset, tmp)) - *okayp = true; - return t; -} - -static time_t -time2(struct tm * const tmp, - struct tm *(*funcp)(struct state const *, time_t const *, - int_fast32_t, struct tm *), - struct state const *sp, - const int_fast32_t offset, - bool *okayp) -{ - time_t t; - - /* - ** First try without normalization of seconds - ** (in case tm_sec contains a value associated with a leap second). - ** If that fails, try with normalization of seconds. - */ - t = time2sub(tmp, funcp, sp, offset, okayp, false); - return *okayp ? t : time2sub(tmp, funcp, sp, offset, okayp, true); -} - -static time_t -time1(struct tm *const tmp, - struct tm *(*funcp)(struct state const *, time_t const *, - int_fast32_t, struct tm *), - struct state const *sp, - const int_fast32_t offset) -{ - register time_t t; - register int samei, otheri; - register int sameind, otherind; - register int i; - register int nseen; - char seen[TZ_MAX_TYPES]; - unsigned char types[TZ_MAX_TYPES]; - bool okay; - - if (tmp == NULL) { - errno = EINVAL; - return WRONG; - } - if (tmp->tm_isdst > 1) - tmp->tm_isdst = 1; - t = time2(tmp, funcp, sp, offset, &okay); - if (okay) - return t; - if (tmp->tm_isdst < 0) -#ifdef PCTS - /* - ** POSIX Conformance Test Suite code courtesy Grant Sullivan. - */ - tmp->tm_isdst = 0; /* reset to std and try again */ -#else - return t; -#endif /* !defined PCTS */ - /* - ** We're supposed to assume that somebody took a time of one type - ** and did some math on it that yielded a "struct tm" that's bad. - ** We try to divine the type they started from and adjust to the - ** type they need. - */ - if (sp == NULL) - return WRONG; - for (i = 0; i < sp->typecnt; ++i) - seen[i] = false; - nseen = 0; - for (i = sp->timecnt - 1; i >= 0; --i) - if (!seen[sp->types[i]] && !ttunspecified(sp, sp->types[i])) { - seen[sp->types[i]] = true; - types[nseen++] = sp->types[i]; - } - for (sameind = 0; sameind < nseen; ++sameind) { - samei = types[sameind]; - if (sp->ttis[samei].tt_isdst != tmp->tm_isdst) - continue; - for (otherind = 0; otherind < nseen; ++otherind) { - otheri = types[otherind]; - if (sp->ttis[otheri].tt_isdst == tmp->tm_isdst) - continue; - tmp->tm_sec += (sp->ttis[otheri].tt_utoff - - sp->ttis[samei].tt_utoff); - tmp->tm_isdst = !tmp->tm_isdst; - t = time2(tmp, funcp, sp, offset, &okay); - if (okay) - return t; - tmp->tm_sec -= (sp->ttis[otheri].tt_utoff - - sp->ttis[samei].tt_utoff); - tmp->tm_isdst = !tmp->tm_isdst; - } - } - return WRONG; -} - -static time_t -mktime_tzname(struct state *sp, struct tm *tmp, bool setname) -{ - if (sp) - return time1(tmp, localsub, sp, setname); - else { - gmtcheck(); - return time1(tmp, gmtsub, gmtptr, 0); - } -} - -#if NETBSD_INSPIRED - -time_t -mktime_z(struct state *sp, struct tm *tmp) -{ - return mktime_tzname(sp, tmp, false); -} - -#endif - -time_t -mktime(struct tm *tmp) -{ - time_t t; - int err = lock(); - if (err) { - errno = err; - return -1; - } - tzset_unlocked(); - t = mktime_tzname(lclptr, tmp, true); - unlock(); - return t; -} - -#if STD_INSPIRED -/* This function is obsolescent and may disappear in future releases. - Callers can instead use mktime. */ -time_t -timelocal(struct tm *tmp) -{ - if (tmp != NULL) - tmp->tm_isdst = -1; /* in case it wasn't initialized */ - return mktime(tmp); -} -#endif - -#ifndef EXTERN_TIMEOFF -# ifndef timeoff -# define timeoff my_timeoff /* Don't collide with OpenBSD 7.4 . */ -# endif -# define EXTERN_TIMEOFF static -#endif - -/* This function is obsolescent and may disappear in future releases. - Callers can instead use mktime_z with a fixed-offset zone. */ -EXTERN_TIMEOFF time_t -timeoff(struct tm *tmp, long offset) -{ - if (tmp) - tmp->tm_isdst = 0; - gmtcheck(); - return time1(tmp, gmtsub, gmtptr, offset); -} - -time_t -timegm(struct tm *tmp) -{ - time_t t; - struct tm tmcpy; - mktmcpy(&tmcpy, tmp); - tmcpy.tm_wday = -1; - t = timeoff(&tmcpy, 0); - if (0 <= tmcpy.tm_wday) - *tmp = tmcpy; - return t; -} - -static int_fast32_t -leapcorr(struct state const *sp, time_t t) -{ - register struct lsinfo const * lp; - register int i; - - i = sp->leapcnt; - while (--i >= 0) { - lp = &sp->lsis[i]; - if (t >= lp->ls_trans) - return lp->ls_corr; - } - return 0; -} - - -/* - * ************************************************************************** - * The code from here to the end of the file is the code for the - * strftime() function. - * ***************** - */ - - -#ifndef DEPRECATE_TWO_DIGIT_YEARS -# define DEPRECATE_TWO_DIGIT_YEARS false -#endif - -struct lc_time_T { - const char * mon[MONSPERYEAR]; - const char * month[MONSPERYEAR]; - const char * wday[DAYSPERWEEK]; - const char * weekday[DAYSPERWEEK]; - const char * X_fmt; - const char * x_fmt; - const char * c_fmt; - const char * am; - const char * pm; - const char * date_fmt; -}; - -static const struct lc_time_T C_time_locale = { - { - "Jan", "Feb", "Mar", "Apr", "May", "Jun", - "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" - }, { - "January", "February", "March", "April", "May", "June", - "July", "August", "September", "October", "November", "December" - }, { - "Sun", "Mon", "Tue", "Wed", - "Thu", "Fri", "Sat" - }, { - "Sunday", "Monday", "Tuesday", "Wednesday", - "Thursday", "Friday", "Saturday" - }, - - /* X_fmt */ - "%H:%M:%S", - - /* - ** x_fmt - ** C99 and later require this format. - ** Using just numbers (as here) makes Quakers happier; - ** it's also compatible with SVR4. - */ - "%m/%d/%y", - - /* - ** c_fmt - ** C99 and later require this format. - ** Previously this code used "%D %X", but we now conform to C99. - ** Note that - ** "%a %b %d %H:%M:%S %Y" - ** is used by Solaris 2.3. - */ - "%a %b %e %T %Y", - - /* am */ - "AM", - - /* pm */ - "PM", - - /* date_fmt */ - "%a %b %e %H:%M:%S %Z %Y" -}; - -enum warn { IN_NONE, IN_SOME, IN_THIS, IN_ALL }; - -static char * _add(const char *, char *, const char *); -static char * _conv(int, const char *, char *, const char *); -static char * _fmt(const char *, const struct tm *, char *, const char *, - enum warn *); -static char * _yconv(int, int, bool, bool, char *, char const *); - -#ifndef YEAR_2000_NAME -# define YEAR_2000_NAME "CHECK_STRFTIME_FORMATS_FOR_TWO_DIGIT_YEARS" -#endif /* !defined YEAR_2000_NAME */ - -#if HAVE_STRFTIME_L -size_t -strftime_l(char *restrict s, size_t maxsize, char const *restrict format, - struct tm const *restrict t, - ATTRIBUTE_MAYBE_UNUSED locale_t locale) -{ - /* Just call strftime, as only the C locale is supported. */ - return strftime(s, maxsize, format, t); -} -#endif - -size_t -strftime(char *restrict s, size_t maxsize, char const *restrict format, - struct tm const *restrict t) -{ - char * p; - int saved_errno = errno; - enum warn warn = IN_NONE; - - tzset(); - p = _fmt(format, t, s, s + maxsize, &warn); - if (DEPRECATE_TWO_DIGIT_YEARS - && warn != IN_NONE && getenv(YEAR_2000_NAME)) { - fprintf(stderr, "\n"); - fprintf(stderr, "strftime format \"%s\" ", format); - fprintf(stderr, "yields only two digits of years in "); - if (warn == IN_SOME) - fprintf(stderr, "some locales"); - else if (warn == IN_THIS) - fprintf(stderr, "the current locale"); - else fprintf(stderr, "all locales"); - fprintf(stderr, "\n"); - } - if (p == s + maxsize) { - errno = ERANGE; - return 0; - } - *p = '\0'; - errno = saved_errno; - return p - s; -} - -static char * -_fmt(const char *format, const struct tm *t, char *pt, - const char *ptlim, enum warn *warnp) -{ - struct lc_time_T const *Locale = &C_time_locale; - - for ( ; *format; ++format) { - if (*format == '%') { - label: - switch (*++format) { - default: - /* Output unknown conversion specifiers as-is, - to aid debugging. This includes '%' at - format end. This conforms to C23 section - 7.29.3.5 paragraph 6, which says behavior - is undefined here. */ - --format; - break; - case 'A': - pt = _add((t->tm_wday < 0 || - t->tm_wday >= DAYSPERWEEK) ? - "?" : Locale->weekday[t->tm_wday], - pt, ptlim); - continue; - case 'a': - pt = _add((t->tm_wday < 0 || - t->tm_wday >= DAYSPERWEEK) ? - "?" : Locale->wday[t->tm_wday], - pt, ptlim); - continue; - case 'B': - pt = _add((t->tm_mon < 0 || - t->tm_mon >= MONSPERYEAR) ? - "?" : Locale->month[t->tm_mon], - pt, ptlim); - continue; - case 'b': - case 'h': - pt = _add((t->tm_mon < 0 || - t->tm_mon >= MONSPERYEAR) ? - "?" : Locale->mon[t->tm_mon], - pt, ptlim); - continue; - case 'C': - /* - ** %C used to do a... - ** _fmt("%a %b %e %X %Y", t); - ** ...whereas now POSIX 1003.2 calls for - ** something completely different. - ** (ado, 1993-05-24) - */ - pt = _yconv(t->tm_year, TM_YEAR_BASE, - true, false, pt, ptlim); - continue; - case 'c': - { - enum warn warn2 = IN_SOME; - - pt = _fmt(Locale->c_fmt, t, pt, ptlim, &warn2); - if (warn2 == IN_ALL) - warn2 = IN_THIS; - if (warn2 > *warnp) - *warnp = warn2; - } - continue; - case 'D': - pt = _fmt("%m/%d/%y", t, pt, ptlim, warnp); - continue; - case 'd': - pt = _conv(t->tm_mday, "%02d", pt, ptlim); - continue; - case 'E': - case 'O': - /* - ** Locale modifiers of C99 and later. - ** The sequences - ** %Ec %EC %Ex %EX %Ey %EY - ** %Od %oe %OH %OI %Om %OM - ** %OS %Ou %OU %OV %Ow %OW %Oy - ** are supposed to provide alternative - ** representations. - */ - goto label; - case 'e': - pt = _conv(t->tm_mday, "%2d", pt, ptlim); - continue; - case 'F': - pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp); - continue; - case 'H': - pt = _conv(t->tm_hour, "%02d", pt, ptlim); - continue; - case 'I': - pt = _conv((t->tm_hour % 12) ? - (t->tm_hour % 12) : 12, - "%02d", pt, ptlim); - continue; - case 'j': - pt = _conv(t->tm_yday + 1, "%03d", pt, ptlim); - continue; - case 'k': - /* - ** This used to be... - ** _conv(t->tm_hour % 12 ? - ** t->tm_hour % 12 : 12, 2, ' '); - ** ...and has been changed to the below to - ** match SunOS 4.1.1 and Arnold Robbins' - ** strftime version 3.0. That is, "%k" and - ** "%l" have been swapped. - ** (ado, 1993-05-24) - */ - pt = _conv(t->tm_hour, "%2d", pt, ptlim); - continue; -#ifdef KITCHEN_SINK - case 'K': - /* - ** After all this time, still unclaimed! - */ - pt = _add("kitchen sink", pt, ptlim); - continue; -#endif /* defined KITCHEN_SINK */ - case 'l': - /* - ** This used to be... - ** _conv(t->tm_hour, 2, ' '); - ** ...and has been changed to the below to - ** match SunOS 4.1.1 and Arnold Robbin's - ** strftime version 3.0. That is, "%k" and - ** "%l" have been swapped. - ** (ado, 1993-05-24) - */ - pt = _conv((t->tm_hour % 12) ? - (t->tm_hour % 12) : 12, - "%2d", pt, ptlim); - continue; - case 'M': - pt = _conv(t->tm_min, "%02d", pt, ptlim); - continue; - case 'm': - pt = _conv(t->tm_mon + 1, "%02d", pt, ptlim); - continue; - case 'n': - pt = _add("\n", pt, ptlim); - continue; - case 'p': - pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ? - Locale->pm : - Locale->am, - pt, ptlim); - continue; - case 'R': - pt = _fmt("%H:%M", t, pt, ptlim, warnp); - continue; - case 'r': - pt = _fmt("%I:%M:%S %p", t, pt, ptlim, warnp); - continue; - case 'S': - pt = _conv(t->tm_sec, "%02d", pt, ptlim); - continue; - case 's': - { - struct tm tm; - char buf[INT_STRLEN_MAXIMUM( - time_t) + 1]; - time_t mkt; - - tm.tm_sec = t->tm_sec; - tm.tm_min = t->tm_min; - tm.tm_hour = t->tm_hour; - tm.tm_mday = t->tm_mday; - tm.tm_mon = t->tm_mon; - tm.tm_year = t->tm_year; -#ifdef TM_GMTOFF - mkt = timeoff(&tm, t->TM_GMTOFF); -#else - tm.tm_isdst = t->tm_isdst; - mkt = mktime(&tm); -#endif - /* If mktime fails, %s expands to the - value of (time_t) -1 as a failure - marker; this is better in practice - than strftime failing. */ - if (TYPE_SIGNED(time_t)) { - intmax_t n = mkt; - sprintf(buf, "%"PRIdMAX, n); - } else { - uintmax_t n = mkt; - sprintf(buf, "%"PRIuMAX, n); - } - pt = _add(buf, pt, ptlim); - } - continue; - case 'T': - pt = _fmt("%H:%M:%S", t, pt, ptlim, warnp); - continue; - case 't': - pt = _add("\t", pt, ptlim); - continue; - case 'U': - pt = _conv((t->tm_yday + DAYSPERWEEK - - t->tm_wday) / DAYSPERWEEK, - "%02d", pt, ptlim); - continue; - case 'u': - /* - ** From Arnold Robbins' strftime version 3.0: - ** "ISO 8601: Weekday as a decimal number - ** [1 (Monday) - 7]" - ** (ado, 1993-05-24) - */ - pt = _conv((t->tm_wday == 0) ? - DAYSPERWEEK : t->tm_wday, - "%d", pt, ptlim); - continue; - case 'V': /* ISO 8601 week number */ - case 'G': /* ISO 8601 year (four digits) */ - case 'g': /* ISO 8601 year (two digits) */ -/* -** From Arnold Robbins' strftime version 3.0: "the week number of the -** year (the first Monday as the first day of week 1) as a decimal number -** (01-53)." -** (ado, 1993-05-24) -** -** From by Markus Kuhn: -** "Week 01 of a year is per definition the first week which has the -** Thursday in this year, which is equivalent to the week which contains -** the fourth day of January. In other words, the first week of a new year -** is the week which has the majority of its days in the new year. Week 01 -** might also contain days from the previous year and the week before week -** 01 of a year is the last week (52 or 53) of the previous year even if -** it contains days from the new year. A week starts with Monday (day 1) -** and ends with Sunday (day 7). For example, the first week of the year -** 1997 lasts from 1996-12-30 to 1997-01-05..." -** (ado, 1996-01-02) -*/ - { - int year; - int base; - int yday; - int wday; - int w; - - year = t->tm_year; - base = TM_YEAR_BASE; - yday = t->tm_yday; - wday = t->tm_wday; - for ( ; ; ) { - int len; - int bot; - int top; - - len = isleap_sum(year, base) ? - DAYSPERLYEAR : - DAYSPERNYEAR; - /* - ** What yday (-3 ... 3) does - ** the ISO year begin on? - */ - bot = ((yday + 11 - wday) % - DAYSPERWEEK) - 3; - /* - ** What yday does the NEXT - ** ISO year begin on? - */ - top = bot - - (len % DAYSPERWEEK); - if (top < -3) - top += DAYSPERWEEK; - top += len; - if (yday >= top) { - ++base; - w = 1; - break; - } - if (yday >= bot) { - w = 1 + ((yday - bot) / - DAYSPERWEEK); - break; - } - --base; - yday += isleap_sum(year, base) ? - DAYSPERLYEAR : - DAYSPERNYEAR; - } -#ifdef XPG4_1994_04_09 - if ((w == 52 && - t->tm_mon == TM_JANUARY) || - (w == 1 && - t->tm_mon == TM_DECEMBER)) - w = 53; -#endif /* defined XPG4_1994_04_09 */ - if (*format == 'V') - pt = _conv(w, "%02d", - pt, ptlim); - else if (*format == 'g') { - *warnp = IN_ALL; - pt = _yconv(year, base, - false, true, - pt, ptlim); - } else pt = _yconv(year, base, - true, true, - pt, ptlim); - } - continue; - case 'v': - /* - ** From Arnold Robbins' strftime version 3.0: - ** "date as dd-bbb-YYYY" - ** (ado, 1993-05-24) - */ - pt = _fmt("%e-%b-%Y", t, pt, ptlim, warnp); - continue; - case 'W': - pt = _conv((t->tm_yday + DAYSPERWEEK - - (t->tm_wday ? - (t->tm_wday - 1) : - (DAYSPERWEEK - 1))) / DAYSPERWEEK, - "%02d", pt, ptlim); - continue; - case 'w': - pt = _conv(t->tm_wday, "%d", pt, ptlim); - continue; - case 'X': - pt = _fmt(Locale->X_fmt, t, pt, ptlim, warnp); - continue; - case 'x': - { - enum warn warn2 = IN_SOME; - - pt = _fmt(Locale->x_fmt, t, pt, ptlim, &warn2); - if (warn2 == IN_ALL) - warn2 = IN_THIS; - if (warn2 > *warnp) - *warnp = warn2; - } - continue; - case 'y': - *warnp = IN_ALL; - pt = _yconv(t->tm_year, TM_YEAR_BASE, - false, true, - pt, ptlim); - continue; - case 'Y': - pt = _yconv(t->tm_year, TM_YEAR_BASE, - true, true, - pt, ptlim); - continue; - case 'Z': -#ifdef TM_ZONE - pt = _add(t->TM_ZONE, pt, ptlim); -#elif HAVE_TZNAME - if (t->tm_isdst >= 0) - pt = _add(tzname[t->tm_isdst != 0], - pt, ptlim); -#endif - /* - ** C99 and later say that %Z must be - ** replaced by the empty string if the - ** time zone abbreviation is not - ** determinable. - */ - continue; - case 'z': -#if defined TM_GMTOFF || USG_COMPAT || ALTZONE - { - long diff; - char const * sign; - bool negative; - -# ifdef TM_GMTOFF - diff = t->TM_GMTOFF; -# else - /* - ** C99 and later say that the UT offset must - ** be computed by looking only at - ** tm_isdst. This requirement is - ** incorrect, since it means the code - ** must rely on magic (in this case - ** altzone and timezone), and the - ** magic might not have the correct - ** offset. Doing things correctly is - ** tricky and requires disobeying the standard; - ** see GNU C strftime for details. - ** For now, punt and conform to the - ** standard, even though it's incorrect. - ** - ** C99 and later say that %z must be replaced by - ** the empty string if the time zone is not - ** determinable, so output nothing if the - ** appropriate variables are not available. - */ - if (t->tm_isdst < 0) - continue; - if (t->tm_isdst == 0) -# if USG_COMPAT - diff = -timezone; -# else - continue; -# endif - else -# if ALTZONE - diff = -altzone; -# else - continue; -# endif -# endif - negative = diff < 0; - if (diff == 0) { -# ifdef TM_ZONE - negative = t->TM_ZONE[0] == '-'; -# else - negative = t->tm_isdst < 0; -# if HAVE_TZNAME - if (tzname[t->tm_isdst != 0][0] == '-') - negative = true; -# endif -# endif - } - if (negative) { - sign = "-"; - diff = -diff; - } else sign = "+"; - pt = _add(sign, pt, ptlim); - diff /= SECSPERMIN; - diff = (diff / MINSPERHOUR) * 100 + - (diff % MINSPERHOUR); - pt = _conv(diff, "%04d", pt, ptlim); - } -#endif - continue; - case '+': - pt = _fmt(Locale->date_fmt, t, pt, ptlim, - warnp); - continue; - case '%': - break; - } - } - if (pt == ptlim) - break; - *pt++ = *format; - } - return pt; -} - -static char * -_conv(int n, const char *format, char *pt, const char *ptlim) -{ - char buf[INT_STRLEN_MAXIMUM(int) + 1]; - - sprintf(buf, format, n); - return _add(buf, pt, ptlim); -} - -static char * -_add(const char *str, char *pt, const char *ptlim) -{ - while (pt < ptlim && (*pt = *str++) != '\0') - ++pt; - return pt; -} - -/* -** POSIX and the C Standard are unclear or inconsistent about -** what %C and %y do if the year is negative or exceeds 9999. -** Use the convention that %C concatenated with %y yields the -** same output as %Y, and that %Y contains at least 4 bytes, -** with more only if necessary. -*/ - -static char * -_yconv(int a, int b, bool convert_top, bool convert_yy, - char *pt, const char *ptlim) -{ - register int lead; - register int trail; - - int DIVISOR = 100; - trail = a % DIVISOR + b % DIVISOR; - lead = a / DIVISOR + b / DIVISOR + trail / DIVISOR; - trail %= DIVISOR; - if (trail < 0 && lead > 0) { - trail += DIVISOR; - --lead; - } else if (lead < 0 && trail > 0) { - trail -= DIVISOR; - ++lead; - } - if (convert_top) { - if (lead == 0 && trail < 0) - pt = _add("-0", pt, ptlim); - else pt = _conv(lead, "%02d", pt, ptlim); - } - if (convert_yy) - pt = _conv(((trail < 0) ? -trail : trail), "%02d", pt, ptlim); - return pt; } \ No newline at end of file diff --git a/source/os/src/timezone/localtime.c b/source/os/src/timezone/localtime.c new file mode 100644 index 0000000000..ea2a6fb8a9 --- /dev/null +++ b/source/os/src/timezone/localtime.c @@ -0,0 +1,2498 @@ +/* Convert timestamp from time_t to struct tm. */ + +/* +** This file is in the public domain, so clarified as of +** 1996-06-05 by Arthur David Olson. +*/ + +/* +** Leap second handling from Bradley White. +** POSIX.1-1988 style TZ environment variable handling from Guy Harris. +*/ + +/*LINTLIBRARY*/ + +#define LOCALTIME_IMPLEMENTATION +#include "private.h" + +#include "tzdir.h" +#include "tzfile.h" +#include + +#if defined THREAD_SAFE && THREAD_SAFE +# include +static pthread_mutex_t locallock = PTHREAD_MUTEX_INITIALIZER; +static int lock(void) { return pthread_mutex_lock(&locallock); } +static void unlock(void) { pthread_mutex_unlock(&locallock); } +#else +static int lock(void) { return 0; } +static void unlock(void) { } +#endif + +/* A signed type wider than int, so that we can add 1900 + tm_mon/12 to tm_year + without overflow. The static_assert checks that it is indeed wider + than int; if this fails on your platform please let us know. */ +#if INT_MAX < LONG_MAX +typedef long iinntt; +# define IINNTT_MIN LONG_MIN +# define IINNTT_MAX LONG_MAX +#elif INT_MAX < LLONG_MAX +typedef long long iinntt; +# define IINNTT_MIN LLONG_MIN +# define IINNTT_MAX LLONG_MAX +#else +typedef intmax_t iinntt; +# define IINNTT_MIN INTMAX_MIN +# define IINNTT_MAX INTMAX_MAX +#endif +static_assert(IINNTT_MIN < INT_MIN && INT_MAX < IINNTT_MAX); + +/* On platforms where offtime or mktime might overflow, + strftime.c defines USE_TIMEX_T to be true and includes us. + This tells us to #define time_t to an internal type timex_t that is + wide enough so that strftime %s never suffers from integer overflow, + and to #define offtime (if TM_GMTOFF is defined) or mktime (otherwise) + to a static function that returns the redefined time_t. + It also tells us to define only data and code needed + to support the offtime or mktime variant. */ +#ifndef USE_TIMEX_T +# define USE_TIMEX_T false +#endif +#if USE_TIMEX_T +# undef TIME_T_MIN +# undef TIME_T_MAX +# undef time_t +# define time_t timex_t +# if MKTIME_FITS_IN(LONG_MIN, LONG_MAX) +typedef long timex_t; +# define TIME_T_MIN LONG_MIN +# define TIME_T_MAX LONG_MAX +# elif MKTIME_FITS_IN(LLONG_MIN, LLONG_MAX) +typedef long long timex_t; +# define TIME_T_MIN LLONG_MIN +# define TIME_T_MAX LLONG_MAX +# else +typedef intmax_t timex_t; +# define TIME_T_MIN INTMAX_MIN +# define TIME_T_MAX INTMAX_MAX +# endif + +# ifdef TM_GMTOFF +# undef timeoff +# define timeoff timex_timeoff +# undef EXTERN_TIMEOFF +# else +# undef mktime +# define mktime timex_mktime +# endif +#endif + +#ifndef TZ_ABBR_CHAR_SET +# define TZ_ABBR_CHAR_SET \ + "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 :+-._" +#endif /* !defined TZ_ABBR_CHAR_SET */ + +#ifndef TZ_ABBR_ERR_CHAR +# define TZ_ABBR_ERR_CHAR '_' +#endif /* !defined TZ_ABBR_ERR_CHAR */ + +/* +** Support non-POSIX platforms that distinguish between text and binary files. +*/ + +#ifndef O_BINARY +# define O_BINARY 0 +#endif + +#ifndef WILDABBR +/* +** Someone might make incorrect use of a time zone abbreviation: +** 1. They might reference tzname[0] before calling tzset (explicitly +** or implicitly). +** 2. They might reference tzname[1] before calling tzset (explicitly +** or implicitly). +** 3. They might reference tzname[1] after setting to a time zone +** in which Daylight Saving Time is never observed. +** 4. They might reference tzname[0] after setting to a time zone +** in which Standard Time is never observed. +** 5. They might reference tm.TM_ZONE after calling offtime. +** What's best to do in the above cases is open to debate; +** for now, we just set things up so that in any of the five cases +** WILDABBR is used. Another possibility: initialize tzname[0] to the +** string "tzname[0] used before set", and similarly for the other cases. +** And another: initialize tzname[0] to "ERA", with an explanation in the +** manual page of what this "time zone abbreviation" means (doing this so +** that tzname[0] has the "normal" length of three characters). +*/ +# define WILDABBR " " +#endif /* !defined WILDABBR */ + +static const char wildabbr[] = WILDABBR; + +static char const etc_utc[] = "Etc/UTC"; + +#if defined TM_ZONE || ((!USE_TIMEX_T || !defined TM_GMTOFF) && defined TZ_NAME) +static char const *utc = etc_utc + sizeof "Etc/" - 1; +#endif + +/* +** The DST rules to use if TZ has no rules and we can't load TZDEFRULES. +** Default to US rules as of 2017-05-07. +** POSIX does not specify the default DST rules; +** for historical reasons, US rules are a common default. +*/ +#ifndef TZDEFRULESTRING +# define TZDEFRULESTRING ",M3.2.0,M11.1.0" +#endif + +struct ttinfo { /* time type information */ + int_fast32_t tt_utoff; /* UT offset in seconds */ + bool tt_isdst; /* used to set tm_isdst */ + int tt_desigidx; /* abbreviation list index */ + bool tt_ttisstd; /* transition is std time */ + bool tt_ttisut; /* transition is UT */ +}; + +struct lsinfo { /* leap second information */ + time_t ls_trans; /* transition time */ + int_fast32_t ls_corr; /* correction to apply */ +}; + +/* This abbreviation means local time is unspecified. */ +static char const UNSPEC[] = "-00"; + +/* How many extra bytes are needed at the end of struct state's chars array. + This needs to be at least 1 for null termination in case the input + data isn't properly terminated, and it also needs to be big enough + for ttunspecified to work without crashing. */ +enum { CHARS_EXTRA = max(sizeof UNSPEC, 2) - 1 }; + +/* Limit to time zone abbreviation length in proleptic TZ strings. + This is distinct from TZ_MAX_CHARS, which limits TZif file contents. */ +#ifndef TZNAME_MAXIMUM +# define TZNAME_MAXIMUM 255 +#endif + +/* A representation of the contents of a TZif file. Ideally this + would have no size limits; the following sizes should suffice for + practical use. This struct should not be too large, as instances + are put on the stack and stacks are relatively small on some platforms. + See tzfile.h for more about the sizes. */ +struct state { + int leapcnt; + int timecnt; + int typecnt; + int charcnt; + bool goback; + bool goahead; + time_t ats[TZ_MAX_TIMES]; + unsigned char types[TZ_MAX_TIMES]; + struct ttinfo ttis[TZ_MAX_TYPES]; + char chars[max(max(TZ_MAX_CHARS + CHARS_EXTRA, sizeof "UTC"), + 2 * (TZNAME_MAXIMUM + 1))]; + struct lsinfo lsis[TZ_MAX_LEAPS]; +}; + +enum r_type { + JULIAN_DAY, /* Jn = Julian day */ + DAY_OF_YEAR, /* n = day of year */ + MONTH_NTH_DAY_OF_WEEK /* Mm.n.d = month, week, day of week */ +}; + +struct rule { + enum r_type r_type; /* type of rule */ + int r_day; /* day number of rule */ + int r_week; /* week number of rule */ + int r_mon; /* month number of rule */ + int_fast32_t r_time; /* transition time of rule */ +}; + +static struct tm *gmtsub(struct state const *, time_t const *, int_fast32_t, + struct tm *); +static bool increment_overflow(int *, int); +static bool increment_overflow_time(time_t *, int_fast32_t); +static int_fast32_t leapcorr(struct state const *, time_t); +static struct tm *timesub(time_t const *, int_fast32_t, struct state const *, + struct tm *); +static bool tzparse(char const *, struct state *, struct state const *); + +#ifdef ALL_STATE +static struct state * lclptr; +static struct state * gmtptr; +#endif /* defined ALL_STATE */ + +#ifndef ALL_STATE +static struct state lclmem; +static struct state gmtmem; +static struct state *const lclptr = &lclmem; +static struct state *const gmtptr = &gmtmem; +#endif /* State Farm */ + +#ifndef TZ_STRLEN_MAX +# define TZ_STRLEN_MAX 255 +#endif /* !defined TZ_STRLEN_MAX */ + +#if !USE_TIMEX_T || !defined TM_GMTOFF +static char lcl_TZname[TZ_STRLEN_MAX + 1]; +static int lcl_is_set; +#endif + +/* +** Section 4.12.3 of X3.159-1989 requires that +** Except for the strftime function, these functions [asctime, +** ctime, gmtime, localtime] return values in one of two static +** objects: a broken-down time structure and an array of char. +** Thanks to Paul Eggert for noting this. +** +** Although this requirement was removed in C99 it is still present in POSIX. +** Follow the requirement if SUPPORT_C89, even though this is more likely to +** trigger latent bugs in programs. +*/ + +#if !USE_TIMEX_T + +# if SUPPORT_C89 +static struct tm tm; +#endif + +# if 2 <= HAVE_TZNAME + TZ_TIME_T +char * tzname[2] = { + (char *) wildabbr, + (char *) wildabbr +}; +# endif +# if 2 <= USG_COMPAT + TZ_TIME_T +long timezone; +int daylight; +# endif +# if 2 <= ALTZONE + TZ_TIME_T +long altzone; +# endif + +#endif + +/* Initialize *S to a value based on UTOFF, ISDST, and DESIGIDX. */ +static void +init_ttinfo(struct ttinfo *s, int_fast32_t utoff, bool isdst, int desigidx) +{ + s->tt_utoff = utoff; + s->tt_isdst = isdst; + s->tt_desigidx = desigidx; + s->tt_ttisstd = false; + s->tt_ttisut = false; +} + +/* Return true if SP's time type I does not specify local time. */ +static bool +ttunspecified(struct state const *sp, int i) +{ + char const *abbr = &sp->chars[sp->ttis[i].tt_desigidx]; + /* memcmp is likely faster than strcmp, and is safe due to CHARS_EXTRA. */ + return memcmp(abbr, UNSPEC, sizeof UNSPEC) == 0; +} + +static int_fast32_t +detzcode(const char *const codep) +{ + register int_fast32_t result; + register int i; + int_fast32_t one = 1; + int_fast32_t halfmaxval = one << (32 - 2); + int_fast32_t maxval = halfmaxval - 1 + halfmaxval; + int_fast32_t minval = -1 - maxval; + + result = codep[0] & 0x7f; + for (i = 1; i < 4; ++i) + result = (result << 8) | (codep[i] & 0xff); + + if (codep[0] & 0x80) { + /* Do two's-complement negation even on non-two's-complement machines. + If the result would be minval - 1, return minval. */ + result -= !TWOS_COMPLEMENT(int_fast32_t) && result != 0; + result += minval; + } + return result; +} + +static int_fast64_t +detzcode64(const char *const codep) +{ + register int_fast64_t result; + register int i; + int_fast64_t one = 1; + int_fast64_t halfmaxval = one << (64 - 2); + int_fast64_t maxval = halfmaxval - 1 + halfmaxval; + int_fast64_t minval = -TWOS_COMPLEMENT(int_fast64_t) - maxval; + + result = codep[0] & 0x7f; + for (i = 1; i < 8; ++i) + result = (result << 8) | (codep[i] & 0xff); + + if (codep[0] & 0x80) { + /* Do two's-complement negation even on non-two's-complement machines. + If the result would be minval - 1, return minval. */ + result -= !TWOS_COMPLEMENT(int_fast64_t) && result != 0; + result += minval; + } + return result; +} + +#if !USE_TIMEX_T || !defined TM_GMTOFF + +static void +update_tzname_etc(struct state const *sp, struct ttinfo const *ttisp) +{ +# if HAVE_TZNAME + tzname[ttisp->tt_isdst] = (char *) &sp->chars[ttisp->tt_desigidx]; +# endif +# if USG_COMPAT + if (!ttisp->tt_isdst) + timezone = - ttisp->tt_utoff; +# endif +# if ALTZONE + if (ttisp->tt_isdst) + altzone = - ttisp->tt_utoff; +# endif +} + +/* If STDDST_MASK indicates that SP's TYPE provides useful info, + update tzname, timezone, and/or altzone and return STDDST_MASK, + diminished by the provided info if it is a specified local time. + Otherwise, return STDDST_MASK. See settzname for STDDST_MASK. */ +static int +may_update_tzname_etc(int stddst_mask, struct state *sp, int type) +{ + struct ttinfo *ttisp = &sp->ttis[type]; + int this_bit = 1 << ttisp->tt_isdst; + if (stddst_mask & this_bit) { + update_tzname_etc(sp, ttisp); + if (!ttunspecified(sp, type)) + return stddst_mask & ~this_bit; + } + return stddst_mask; +} + +static void +settzname(void) +{ + register struct state * const sp = lclptr; + register int i; + + /* If STDDST_MASK & 1 we need info about a standard time. + If STDDST_MASK & 2 we need info about a daylight saving time. + When STDDST_MASK becomes zero we can stop looking. */ + int stddst_mask = 0; + +# if HAVE_TZNAME + tzname[0] = tzname[1] = (char *) (sp ? wildabbr : utc); + stddst_mask = 3; +# endif +# if USG_COMPAT + timezone = 0; + stddst_mask = 3; +# endif +# if ALTZONE + altzone = 0; + stddst_mask |= 2; +# endif + /* + ** And to get the latest time zone abbreviations into tzname. . . + */ + if (sp) { + for (i = sp->timecnt - 1; stddst_mask && 0 <= i; i--) + stddst_mask = may_update_tzname_etc(stddst_mask, sp, sp->types[i]); + for (i = sp->typecnt - 1; stddst_mask && 0 <= i; i--) + stddst_mask = may_update_tzname_etc(stddst_mask, sp, i); + } +# if USG_COMPAT + daylight = stddst_mask >> 1 ^ 1; +# endif +} + +/* Replace bogus characters in time zone abbreviations. + Return 0 on success, an errno value if a time zone abbreviation is + too long. */ +static int +scrub_abbrs(struct state *sp) +{ + int i; + + /* Reject overlong abbreviations. */ + for (i = 0; i < sp->charcnt - (TZNAME_MAXIMUM + 1); ) { + int len = strlen(&sp->chars[i]); + if (TZNAME_MAXIMUM < len) + return EOVERFLOW; + i += len + 1; + } + + /* Replace bogus characters. */ + for (i = 0; i < sp->charcnt; ++i) + if (strchr(TZ_ABBR_CHAR_SET, sp->chars[i]) == NULL) + sp->chars[i] = TZ_ABBR_ERR_CHAR; + + return 0; +} + +#endif + +/* Input buffer for data read from a compiled tz file. */ +union input_buffer { + /* The first part of the buffer, interpreted as a header. */ + struct tzhead tzhead; + + /* The entire buffer. Ideally this would have no size limits; + the following should suffice for practical use. */ + char buf[2 * sizeof(struct tzhead) + 2 * sizeof(struct state) + + 4 * TZ_MAX_TIMES]; +}; + +/* TZDIR with a trailing '/' rather than a trailing '\0'. */ +static char const tzdirslash[sizeof TZDIR] = TZDIR "/"; + +/* Local storage needed for 'tzloadbody'. */ +union local_storage { + /* The results of analyzing the file's contents after it is opened. */ + struct file_analysis { + /* The input buffer. */ + union input_buffer u; + + /* A temporary state used for parsing a TZ string in the file. */ + struct state st; + } u; + + /* The name of the file to be opened. Ideally this would have no + size limits, to support arbitrarily long Zone names. + Limiting Zone names to 1024 bytes should suffice for practical use. + However, there is no need for this to be smaller than struct + file_analysis as that struct is allocated anyway, as the other + union member. */ + char fullname[max(sizeof(struct file_analysis), sizeof tzdirslash + 1024)]; +}; + +/* Load tz data from the file named NAME into *SP. Read extended + format if DOEXTEND. Use *LSP for temporary storage. Return 0 on + success, an errno value on failure. */ +static int +tzloadbody(char const *name, struct state *sp, bool doextend, + union local_storage *lsp) +{ + register int i; + register int fid; + register int stored; + register ssize_t nread; + register bool doaccess; + register union input_buffer *up = &lsp->u.u; + register int tzheadsize = sizeof(struct tzhead); + + sp->goback = sp->goahead = false; + + if (! name) { + name = TZDEFAULT; + if (! name) + return EINVAL; + } + + if (name[0] == ':') + ++name; +#ifdef SUPPRESS_TZDIR + /* Do not prepend TZDIR. This is intended for specialized + applications only, due to its security implications. */ + doaccess = true; +#else + doaccess = name[0] == '/'; +#endif + if (!doaccess) { + char const *dot; + if (sizeof lsp->fullname - sizeof tzdirslash <= strlen(name)) + return ENAMETOOLONG; + + /* Create a string "TZDIR/NAME". Using sprintf here + would pull in stdio (and would fail if the + resulting string length exceeded INT_MAX!). */ + memcpy(lsp->fullname, tzdirslash, sizeof tzdirslash); + strcpy(lsp->fullname + sizeof tzdirslash, name); + + /* Set doaccess if NAME contains a ".." file name + component, as such a name could read a file outside + the TZDIR virtual subtree. */ + for (dot = name; (dot = strchr(dot, '.')); dot++) + if ((dot == name || dot[-1] == '/') && dot[1] == '.' + && (dot[2] == '/' || !dot[2])) { + doaccess = true; + break; + } + + name = lsp->fullname; + } + if (doaccess && access(name, R_OK) != 0) + return errno; + fid = open(name, O_RDONLY | O_BINARY); + if (fid < 0) + return errno; + + nread = read(fid, up->buf, sizeof up->buf); + if (nread < tzheadsize) { + int err = nread < 0 ? errno : EINVAL; + close(fid); + return err; + } + if (close(fid) < 0) + return errno; + for (stored = 4; stored <= 8; stored *= 2) { + char version = up->tzhead.tzh_version[0]; + bool skip_datablock = stored == 4 && version; + int_fast32_t datablock_size; + int_fast32_t ttisstdcnt = detzcode(up->tzhead.tzh_ttisstdcnt); + int_fast32_t ttisutcnt = detzcode(up->tzhead.tzh_ttisutcnt); + int_fast64_t prevtr = -1; + int_fast32_t prevcorr; + int_fast32_t leapcnt = detzcode(up->tzhead.tzh_leapcnt); + int_fast32_t timecnt = detzcode(up->tzhead.tzh_timecnt); + int_fast32_t typecnt = detzcode(up->tzhead.tzh_typecnt); + int_fast32_t charcnt = detzcode(up->tzhead.tzh_charcnt); + char const *p = up->buf + tzheadsize; + /* Although tzfile(5) currently requires typecnt to be nonzero, + support future formats that may allow zero typecnt + in files that have a TZ string and no transitions. */ + if (! (0 <= leapcnt && leapcnt < TZ_MAX_LEAPS + && 0 <= typecnt && typecnt < TZ_MAX_TYPES + && 0 <= timecnt && timecnt < TZ_MAX_TIMES + && 0 <= charcnt && charcnt < TZ_MAX_CHARS + && 0 <= ttisstdcnt && ttisstdcnt < TZ_MAX_TYPES + && 0 <= ttisutcnt && ttisutcnt < TZ_MAX_TYPES)) + return EINVAL; + datablock_size + = (timecnt * stored /* ats */ + + timecnt /* types */ + + typecnt * 6 /* ttinfos */ + + charcnt /* chars */ + + leapcnt * (stored + 4) /* lsinfos */ + + ttisstdcnt /* ttisstds */ + + ttisutcnt); /* ttisuts */ + if (nread < tzheadsize + datablock_size) + return EINVAL; + if (skip_datablock) + p += datablock_size; + else { + if (! ((ttisstdcnt == typecnt || ttisstdcnt == 0) + && (ttisutcnt == typecnt || ttisutcnt == 0))) + return EINVAL; + + sp->leapcnt = leapcnt; + sp->timecnt = timecnt; + sp->typecnt = typecnt; + sp->charcnt = charcnt; + + /* Read transitions, discarding those out of time_t range. + But pretend the last transition before TIME_T_MIN + occurred at TIME_T_MIN. */ + timecnt = 0; + for (i = 0; i < sp->timecnt; ++i) { + int_fast64_t at + = stored == 4 ? detzcode(p) : detzcode64(p); + sp->types[i] = at <= TIME_T_MAX; + if (sp->types[i]) { + time_t attime + = ((TYPE_SIGNED(time_t) ? at < TIME_T_MIN : at < 0) + ? TIME_T_MIN : at); + if (timecnt && attime <= sp->ats[timecnt - 1]) { + if (attime < sp->ats[timecnt - 1]) + return EINVAL; + sp->types[i - 1] = 0; + timecnt--; + } + sp->ats[timecnt++] = attime; + } + p += stored; + } + + timecnt = 0; + for (i = 0; i < sp->timecnt; ++i) { + unsigned char typ = *p++; + if (sp->typecnt <= typ) + return EINVAL; + if (sp->types[i]) + sp->types[timecnt++] = typ; + } + sp->timecnt = timecnt; + for (i = 0; i < sp->typecnt; ++i) { + register struct ttinfo * ttisp; + unsigned char isdst, desigidx; + + ttisp = &sp->ttis[i]; + ttisp->tt_utoff = detzcode(p); + p += 4; + isdst = *p++; + if (! (isdst < 2)) + return EINVAL; + ttisp->tt_isdst = isdst; + desigidx = *p++; + if (! (desigidx < sp->charcnt)) + return EINVAL; + ttisp->tt_desigidx = desigidx; + } + for (i = 0; i < sp->charcnt; ++i) + sp->chars[i] = *p++; + /* Ensure '\0'-terminated, and make it safe to call + ttunspecified later. */ + memset(&sp->chars[i], 0, CHARS_EXTRA); + + /* Read leap seconds, discarding those out of time_t range. */ + leapcnt = 0; + for (i = 0; i < sp->leapcnt; ++i) { + int_fast64_t tr = stored == 4 ? detzcode(p) : detzcode64(p); + int_fast32_t corr = detzcode(p + stored); + p += stored + 4; + + /* Leap seconds cannot occur before the Epoch, + or out of order. */ + if (tr <= prevtr) + return EINVAL; + + /* To avoid other botches in this code, each leap second's + correction must differ from the previous one's by 1 + second or less, except that the first correction can be + any value; these requirements are more generous than + RFC 9636, to allow future RFC extensions. */ + if (! (i == 0 + || (prevcorr < corr + ? corr == prevcorr + 1 + : (corr == prevcorr + || corr == prevcorr - 1)))) + return EINVAL; + prevtr = tr; + prevcorr = corr; + + if (tr <= TIME_T_MAX) { + sp->lsis[leapcnt].ls_trans = tr; + sp->lsis[leapcnt].ls_corr = corr; + leapcnt++; + } + } + sp->leapcnt = leapcnt; + + for (i = 0; i < sp->typecnt; ++i) { + register struct ttinfo * ttisp; + + ttisp = &sp->ttis[i]; + if (ttisstdcnt == 0) + ttisp->tt_ttisstd = false; + else { + if (*p != true && *p != false) + return EINVAL; + ttisp->tt_ttisstd = *p++; + } + } + for (i = 0; i < sp->typecnt; ++i) { + register struct ttinfo * ttisp; + + ttisp = &sp->ttis[i]; + if (ttisutcnt == 0) + ttisp->tt_ttisut = false; + else { + if (*p != true && *p != false) + return EINVAL; + ttisp->tt_ttisut = *p++; + } + } + } + + nread -= p - up->buf; + memmove(up->buf, p, nread); + + /* If this is an old file, we're done. */ + if (!version) + break; + } + if (doextend && nread > 2 && + up->buf[0] == '\n' && up->buf[nread - 1] == '\n' && + sp->typecnt + 2 <= TZ_MAX_TYPES) { + struct state *ts = &lsp->u.st; + + up->buf[nread - 1] = '\0'; + if (tzparse(&up->buf[1], ts, sp)) { + + /* Attempt to reuse existing abbreviations. + Without this, America/Anchorage would be right on + the edge after 2037 when TZ_MAX_CHARS is 50, as + sp->charcnt equals 40 (for LMT AST AWT APT AHST + AHDT YST AKDT AKST) and ts->charcnt equals 10 + (for AKST AKDT). Reusing means sp->charcnt can + stay 40 in this example. */ + int gotabbr = 0; + int charcnt = sp->charcnt; + for (i = 0; i < ts->typecnt; i++) { + char *tsabbr = ts->chars + ts->ttis[i].tt_desigidx; + int j; + for (j = 0; j < charcnt; j++) + if (strcmp(sp->chars + j, tsabbr) == 0) { + ts->ttis[i].tt_desigidx = j; + gotabbr++; + break; + } + if (! (j < charcnt)) { + int tsabbrlen = strlen(tsabbr); + if (j + tsabbrlen < TZ_MAX_CHARS) { + strcpy(sp->chars + j, tsabbr); + charcnt = j + tsabbrlen + 1; + ts->ttis[i].tt_desigidx = j; + gotabbr++; + } + } + } + if (gotabbr == ts->typecnt) { + sp->charcnt = charcnt; + + /* Ignore any trailing, no-op transitions generated + by zic as they don't help here and can run afoul + of bugs in zic 2016j or earlier. */ + while (1 < sp->timecnt + && (sp->types[sp->timecnt - 1] + == sp->types[sp->timecnt - 2])) + sp->timecnt--; + + sp->goahead = ts->goahead; + + for (i = 0; i < ts->timecnt; i++) { + time_t t = ts->ats[i]; + if (increment_overflow_time(&t, leapcorr(sp, t)) + || (0 < sp->timecnt + && t <= sp->ats[sp->timecnt - 1])) + continue; + if (TZ_MAX_TIMES <= sp->timecnt) { + sp->goahead = false; + break; + } + sp->ats[sp->timecnt] = t; + sp->types[sp->timecnt] = (sp->typecnt + + ts->types[i]); + sp->timecnt++; + } + for (i = 0; i < ts->typecnt; i++) + sp->ttis[sp->typecnt++] = ts->ttis[i]; + } + } + } + if (sp->typecnt == 0) + return EINVAL; + + return 0; +} + +/* Load tz data from the file named NAME into *SP. Read extended + format if DOEXTEND. Return 0 on success, an errno value on failure. */ +static int +tzload(char const *name, struct state *sp, bool doextend) +{ +#ifdef ALL_STATE + union local_storage *lsp = malloc(sizeof *lsp); + if (!lsp) { + return HAVE_MALLOC_ERRNO ? errno : ENOMEM; + } else { + int err = tzloadbody(name, sp, doextend, lsp); + free(lsp); + return err; + } +#else + union local_storage ls; + return tzloadbody(name, sp, doextend, &ls); +#endif +} + +static const int mon_lengths[2][MONSPERYEAR] = { + { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }, + { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } +}; + +static const int year_lengths[2] = { + DAYSPERNYEAR, DAYSPERLYEAR +}; + +/* Is C an ASCII digit? */ +static bool +is_digit(char c) +{ + return '0' <= c && c <= '9'; +} + +/* +** Given a pointer into a timezone string, scan until a character that is not +** a valid character in a time zone abbreviation is found. +** Return a pointer to that character. +*/ + +ATTRIBUTE_PURE_114833 static const char * +getzname(register const char *strp) +{ + register char c; + + while ((c = *strp) != '\0' && !is_digit(c) && c != ',' && c != '-' && + c != '+') + ++strp; + return strp; +} + +/* +** Given a pointer into an extended timezone string, scan until the ending +** delimiter of the time zone abbreviation is located. +** Return a pointer to the delimiter. +** +** As with getzname above, the legal character set is actually quite +** restricted, with other characters producing undefined results. +** We don't do any checking here; checking is done later in common-case code. +*/ + +ATTRIBUTE_PURE_114833 static const char * +getqzname(register const char *strp, const int delim) +{ + register int c; + + while ((c = *strp) != '\0' && c != delim) + ++strp; + return strp; +} + +/* +** Given a pointer into a timezone string, extract a number from that string. +** Check that the number is within a specified range; if it is not, return +** NULL. +** Otherwise, return a pointer to the first character not part of the number. +*/ + +static const char * +getnum(register const char *strp, int *const nump, const int min, const int max) +{ + register char c; + register int num; + + if (strp == NULL || !is_digit(c = *strp)) + return NULL; + num = 0; + do { + num = num * 10 + (c - '0'); + if (num > max) + return NULL; /* illegal value */ + c = *++strp; + } while (is_digit(c)); + if (num < min) + return NULL; /* illegal value */ + *nump = num; + return strp; +} + +/* +** Given a pointer into a timezone string, extract a number of seconds, +** in hh[:mm[:ss]] form, from the string. +** If any error occurs, return NULL. +** Otherwise, return a pointer to the first character not part of the number +** of seconds. +*/ + +static const char * +getsecs(register const char *strp, int_fast32_t *const secsp) +{ + int num; + int_fast32_t secsperhour = SECSPERHOUR; + + /* + ** 'HOURSPERDAY * DAYSPERWEEK - 1' allows quasi-POSIX rules like + ** "M10.4.6/26", which does not conform to POSIX, + ** but which specifies the equivalent of + ** "02:00 on the first Sunday on or after 23 Oct". + */ + strp = getnum(strp, &num, 0, HOURSPERDAY * DAYSPERWEEK - 1); + if (strp == NULL) + return NULL; + *secsp = num * secsperhour; + if (*strp == ':') { + ++strp; + strp = getnum(strp, &num, 0, MINSPERHOUR - 1); + if (strp == NULL) + return NULL; + *secsp += num * SECSPERMIN; + if (*strp == ':') { + ++strp; + /* 'SECSPERMIN' allows for leap seconds. */ + strp = getnum(strp, &num, 0, SECSPERMIN); + if (strp == NULL) + return NULL; + *secsp += num; + } + } + return strp; +} + +/* +** Given a pointer into a timezone string, extract an offset, in +** [+-]hh[:mm[:ss]] form, from the string. +** If any error occurs, return NULL. +** Otherwise, return a pointer to the first character not part of the time. +*/ + +static const char * +getoffset(register const char *strp, int_fast32_t *const offsetp) +{ + register bool neg = false; + + if (*strp == '-') { + neg = true; + ++strp; + } else if (*strp == '+') + ++strp; + strp = getsecs(strp, offsetp); + if (strp == NULL) + return NULL; /* illegal time */ + if (neg) + *offsetp = -*offsetp; + return strp; +} + +/* +** Given a pointer into a timezone string, extract a rule in the form +** date[/time]. See POSIX Base Definitions section 8.3 variable TZ +** for the format of "date" and "time". +** If a valid rule is not found, return NULL. +** Otherwise, return a pointer to the first character not part of the rule. +*/ + +static const char * +getrule(const char *strp, register struct rule *const rulep) +{ + if (*strp == 'J') { + /* + ** Julian day. + */ + rulep->r_type = JULIAN_DAY; + ++strp; + strp = getnum(strp, &rulep->r_day, 1, DAYSPERNYEAR); + } else if (*strp == 'M') { + /* + ** Month, week, day. + */ + rulep->r_type = MONTH_NTH_DAY_OF_WEEK; + ++strp; + strp = getnum(strp, &rulep->r_mon, 1, MONSPERYEAR); + if (strp == NULL) + return NULL; + if (*strp++ != '.') + return NULL; + strp = getnum(strp, &rulep->r_week, 1, 5); + if (strp == NULL) + return NULL; + if (*strp++ != '.') + return NULL; + strp = getnum(strp, &rulep->r_day, 0, DAYSPERWEEK - 1); + } else if (is_digit(*strp)) { + /* + ** Day of year. + */ + rulep->r_type = DAY_OF_YEAR; + strp = getnum(strp, &rulep->r_day, 0, DAYSPERLYEAR - 1); + } else return NULL; /* invalid format */ + if (strp == NULL) + return NULL; + if (*strp == '/') { + /* + ** Time specified. + */ + ++strp; + strp = getoffset(strp, &rulep->r_time); + } else rulep->r_time = 2 * SECSPERHOUR; /* default = 2:00:00 */ + return strp; +} + +/* +** Given a year, a rule, and the offset from UT at the time that rule takes +** effect, calculate the year-relative time that rule takes effect. +*/ + +static int_fast32_t +transtime(const int year, register const struct rule *const rulep, + const int_fast32_t offset) +{ + register bool leapyear; + register int_fast32_t value; + register int i; + int d, m1, yy0, yy1, yy2, dow; + + leapyear = isleap(year); + switch (rulep->r_type) { + + case JULIAN_DAY: + /* + ** Jn - Julian day, 1 == January 1, 60 == March 1 even in leap + ** years. + ** In non-leap years, or if the day number is 59 or less, just + ** add SECSPERDAY times the day number-1 to the time of + ** January 1, midnight, to get the day. + */ + value = (rulep->r_day - 1) * SECSPERDAY; + if (leapyear && rulep->r_day >= 60) + value += SECSPERDAY; + break; + + case DAY_OF_YEAR: + /* + ** n - day of year. + ** Just add SECSPERDAY times the day number to the time of + ** January 1, midnight, to get the day. + */ + value = rulep->r_day * SECSPERDAY; + break; + + case MONTH_NTH_DAY_OF_WEEK: + /* + ** Mm.n.d - nth "dth day" of month m. + */ + + /* + ** Use Zeller's Congruence to get day-of-week of first day of + ** month. + */ + m1 = (rulep->r_mon + 9) % 12 + 1; + yy0 = (rulep->r_mon <= 2) ? (year - 1) : year; + yy1 = yy0 / 100; + yy2 = yy0 % 100; + dow = ((26 * m1 - 2) / 10 + + 1 + yy2 + yy2 / 4 + yy1 / 4 - 2 * yy1) % 7; + if (dow < 0) + dow += DAYSPERWEEK; + + /* + ** "dow" is the day-of-week of the first day of the month. Get + ** the day-of-month (zero-origin) of the first "dow" day of the + ** month. + */ + d = rulep->r_day - dow; + if (d < 0) + d += DAYSPERWEEK; + for (i = 1; i < rulep->r_week; ++i) { + if (d + DAYSPERWEEK >= + mon_lengths[leapyear][rulep->r_mon - 1]) + break; + d += DAYSPERWEEK; + } + + /* + ** "d" is the day-of-month (zero-origin) of the day we want. + */ + value = d * SECSPERDAY; + for (i = 0; i < rulep->r_mon - 1; ++i) + value += mon_lengths[leapyear][i] * SECSPERDAY; + break; + + default: unreachable(); + } + + /* + ** "value" is the year-relative time of 00:00:00 UT on the day in + ** question. To get the year-relative time of the specified local + ** time on that day, add the transition time and the current offset + ** from UT. + */ + return value + rulep->r_time + offset; +} + +/* +** Given a POSIX.1 proleptic TZ string, fill in the rule tables as +** appropriate. +*/ + +static bool +tzparse(const char *name, struct state *sp, struct state const *basep) +{ + const char * stdname; + const char * dstname; + int_fast32_t stdoffset; + int_fast32_t dstoffset; + register char * cp; + register bool load_ok; + ptrdiff_t stdlen, dstlen, charcnt; + time_t atlo = TIME_T_MIN, leaplo = TIME_T_MIN; + + stdname = name; + if (*name == '<') { + name++; + stdname = name; + name = getqzname(name, '>'); + if (*name != '>') + return false; + stdlen = name - stdname; + name++; + } else { + name = getzname(name); + stdlen = name - stdname; + } + if (! (0 < stdlen && stdlen <= TZNAME_MAXIMUM)) + return false; + name = getoffset(name, &stdoffset); + if (name == NULL) + return false; + charcnt = stdlen + 1; + if (basep) { + if (0 < basep->timecnt) + atlo = basep->ats[basep->timecnt - 1]; + load_ok = false; + sp->leapcnt = basep->leapcnt; + memcpy(sp->lsis, basep->lsis, sp->leapcnt * sizeof *sp->lsis); + } else { + load_ok = tzload(TZDEFRULES, sp, false) == 0; + if (!load_ok) + sp->leapcnt = 0; /* So, we're off a little. */ + } + if (0 < sp->leapcnt) + leaplo = sp->lsis[sp->leapcnt - 1].ls_trans; + sp->goback = sp->goahead = false; + if (*name != '\0') { + if (*name == '<') { + dstname = ++name; + name = getqzname(name, '>'); + if (*name != '>') + return false; + dstlen = name - dstname; + name++; + } else { + dstname = name; + name = getzname(name); + dstlen = name - dstname; /* length of DST abbr. */ + } + if (! (0 < dstlen && dstlen <= TZNAME_MAXIMUM)) + return false; + charcnt += dstlen + 1; + if (*name != '\0' && *name != ',' && *name != ';') { + name = getoffset(name, &dstoffset); + if (name == NULL) + return false; + } else dstoffset = stdoffset - SECSPERHOUR; + if (*name == '\0' && !load_ok) + name = TZDEFRULESTRING; + if (*name == ',' || *name == ';') { + struct rule start; + struct rule end; + register int year; + register int timecnt; + time_t janfirst; + int_fast32_t janoffset = 0; + int yearbeg, yearlim; + + ++name; + if ((name = getrule(name, &start)) == NULL) + return false; + if (*name++ != ',') + return false; + if ((name = getrule(name, &end)) == NULL) + return false; + if (*name != '\0') + return false; + sp->typecnt = 2; /* standard time and DST */ + /* + ** Two transitions per year, from EPOCH_YEAR forward. + */ + init_ttinfo(&sp->ttis[0], -stdoffset, false, 0); + init_ttinfo(&sp->ttis[1], -dstoffset, true, stdlen + 1); + timecnt = 0; + janfirst = 0; + yearbeg = EPOCH_YEAR; + + do { + int_fast32_t yearsecs + = year_lengths[isleap(yearbeg - 1)] * SECSPERDAY; + time_t janfirst1 = janfirst; + yearbeg--; + if (increment_overflow_time(&janfirst1, -yearsecs)) { + janoffset = -yearsecs; + break; + } + janfirst = janfirst1; + } while (atlo < janfirst + && EPOCH_YEAR - YEARSPERREPEAT / 2 < yearbeg); + + while (true) { + int_fast32_t yearsecs + = year_lengths[isleap(yearbeg)] * SECSPERDAY; + int yearbeg1 = yearbeg; + time_t janfirst1 = janfirst; + if (increment_overflow_time(&janfirst1, yearsecs) + || increment_overflow(&yearbeg1, 1) + || atlo <= janfirst1) + break; + yearbeg = yearbeg1; + janfirst = janfirst1; + } + + yearlim = yearbeg; + if (increment_overflow(&yearlim, years_of_observations)) + yearlim = INT_MAX; + for (year = yearbeg; year < yearlim; year++) { + int_fast32_t + starttime = transtime(year, &start, stdoffset), + endtime = transtime(year, &end, dstoffset); + int_fast32_t + yearsecs = (year_lengths[isleap(year)] + * SECSPERDAY); + bool reversed = endtime < starttime; + if (reversed) { + int_fast32_t swap = starttime; + starttime = endtime; + endtime = swap; + } + if (reversed + || (starttime < endtime + && endtime - starttime < yearsecs)) { + if (TZ_MAX_TIMES - 2 < timecnt) + break; + sp->ats[timecnt] = janfirst; + if (! increment_overflow_time + (&sp->ats[timecnt], + janoffset + starttime) + && atlo <= sp->ats[timecnt]) + sp->types[timecnt++] = !reversed; + sp->ats[timecnt] = janfirst; + if (! increment_overflow_time + (&sp->ats[timecnt], + janoffset + endtime) + && atlo <= sp->ats[timecnt]) { + sp->types[timecnt++] = reversed; + } + } + if (endtime < leaplo) { + yearlim = year; + if (increment_overflow(&yearlim, + years_of_observations)) + yearlim = INT_MAX; + } + if (increment_overflow_time + (&janfirst, janoffset + yearsecs)) + break; + janoffset = 0; + } + sp->timecnt = timecnt; + if (! timecnt) { + sp->ttis[0] = sp->ttis[1]; + sp->typecnt = 1; /* Perpetual DST. */ + } else if (years_of_observations <= year - yearbeg) + sp->goback = sp->goahead = true; + } else { + register int_fast32_t theirstdoffset; + register int_fast32_t theirdstoffset; + register int_fast32_t theiroffset; + register bool isdst; + register int i; + register int j; + + if (*name != '\0') + return false; + /* + ** Initial values of theirstdoffset and theirdstoffset. + */ + theirstdoffset = 0; + for (i = 0; i < sp->timecnt; ++i) { + j = sp->types[i]; + if (!sp->ttis[j].tt_isdst) { + theirstdoffset = + - sp->ttis[j].tt_utoff; + break; + } + } + theirdstoffset = 0; + for (i = 0; i < sp->timecnt; ++i) { + j = sp->types[i]; + if (sp->ttis[j].tt_isdst) { + theirdstoffset = + - sp->ttis[j].tt_utoff; + break; + } + } + /* + ** Initially we're assumed to be in standard time. + */ + isdst = false; + /* + ** Now juggle transition times and types + ** tracking offsets as you do. + */ + for (i = 0; i < sp->timecnt; ++i) { + j = sp->types[i]; + sp->types[i] = sp->ttis[j].tt_isdst; + if (sp->ttis[j].tt_ttisut) { + /* No adjustment to transition time */ + } else { + /* + ** If daylight saving time is in + ** effect, and the transition time was + ** not specified as standard time, add + ** the daylight saving time offset to + ** the transition time; otherwise, add + ** the standard time offset to the + ** transition time. + */ + /* + ** Transitions from DST to DDST + ** will effectively disappear since + ** proleptic TZ strings have only one + ** DST offset. + */ + if (isdst && !sp->ttis[j].tt_ttisstd) { + sp->ats[i] += dstoffset - + theirdstoffset; + } else { + sp->ats[i] += stdoffset - + theirstdoffset; + } + } + theiroffset = -sp->ttis[j].tt_utoff; + if (sp->ttis[j].tt_isdst) + theirdstoffset = theiroffset; + else theirstdoffset = theiroffset; + } + /* + ** Finally, fill in ttis. + */ + init_ttinfo(&sp->ttis[0], -stdoffset, false, 0); + init_ttinfo(&sp->ttis[1], -dstoffset, true, stdlen + 1); + sp->typecnt = 2; + } + } else { + dstlen = 0; + sp->typecnt = 1; /* only standard time */ + sp->timecnt = 0; + init_ttinfo(&sp->ttis[0], -stdoffset, false, 0); + } + sp->charcnt = charcnt; + cp = sp->chars; + memcpy(cp, stdname, stdlen); + cp += stdlen; + *cp++ = '\0'; + if (dstlen != 0) { + memcpy(cp, dstname, dstlen); + *(cp + dstlen) = '\0'; + } + return true; +} + +static void +gmtload(struct state *const sp) +{ + if (tzload(etc_utc, sp, true) != 0) + tzparse("UTC0", sp, NULL); +} + +#if !USE_TIMEX_T || !defined TM_GMTOFF + +/* Initialize *SP to a value appropriate for the TZ setting NAME. + Return 0 on success, an errno value on failure. */ +static int +zoneinit(struct state *sp, char const *name) +{ + if (name && ! name[0]) { + /* + ** User wants it fast rather than right. + */ + sp->leapcnt = 0; /* so, we're off a little */ + sp->timecnt = 0; + sp->typecnt = 0; + sp->charcnt = 0; + sp->goback = sp->goahead = false; + init_ttinfo(&sp->ttis[0], 0, false, 0); + strcpy(sp->chars, utc); + return 0; + } else { + int err = tzload(name, sp, true); + if (err != 0 && name && name[0] != ':' && tzparse(name, sp, NULL)) + err = 0; + if (err == 0) + err = scrub_abbrs(sp); + return err; + } +} + +static void +tzset_unlocked(void) +{ + char const *name = getenv("TZ"); + struct state *sp = lclptr; + int lcl = name ? strlen(name) < sizeof lcl_TZname : -1; + if (lcl < 0 + ? lcl_is_set < 0 + : 0 < lcl_is_set && strcmp(lcl_TZname, name) == 0) + return; +# ifdef ALL_STATE + if (! sp) + lclptr = sp = malloc(sizeof *lclptr); +# endif + if (sp) { + if (zoneinit(sp, name) != 0) + zoneinit(sp, ""); + if (0 < lcl) + strcpy(lcl_TZname, name); + } + settzname(); + lcl_is_set = lcl; +} + +#endif + +#if !USE_TIMEX_T +void +tzset(void) +{ + if (lock() != 0) + return; + tzset_unlocked(); + unlock(); +} +#endif + +static void +gmtcheck(void) +{ + static bool gmt_is_set; + if (lock() != 0) + return; + if (! gmt_is_set) { +#ifdef ALL_STATE + gmtptr = malloc(sizeof *gmtptr); +#endif + if (gmtptr) + gmtload(gmtptr); + gmt_is_set = true; + } + unlock(); +} + +#if NETBSD_INSPIRED && !USE_TIMEX_T + +timezone_t +tzalloc(char const *name) +{ + timezone_t sp = malloc(sizeof *sp); + if (sp) { + int err = zoneinit(sp, name); + if (err != 0) { + free(sp); + errno = err; + return NULL; + } + } else if (!HAVE_MALLOC_ERRNO) + errno = ENOMEM; + return sp; +} + +void +tzfree(timezone_t sp) +{ + free(sp); +} + +/* +** NetBSD 6.1.4 has ctime_rz, but omit it because C23 deprecates ctime and +** POSIX.1-2024 removes ctime_r. Both have potential security problems that +** ctime_rz would share. Callers can instead use localtime_rz + strftime. +** +** NetBSD 6.1.4 has tzgetname, but omit it because it doesn't work +** in zones with three or more time zone abbreviations. +** Callers can instead use localtime_rz + strftime. +*/ + +#endif + +#if !USE_TIMEX_T || !defined TM_GMTOFF + +/* +** The easy way to behave "as if no library function calls" localtime +** is to not call it, so we drop its guts into "localsub", which can be +** freely called. (And no, the PANS doesn't require the above behavior, +** but it *is* desirable.) +** +** If successful and SETNAME is nonzero, +** set the applicable parts of tzname, timezone and altzone; +** however, it's OK to omit this step for proleptic TZ strings +** since in that case tzset should have already done this step correctly. +** SETNAME's type is int_fast32_t for compatibility with gmtsub, +** but it is actually a boolean and its value should be 0 or 1. +*/ + +/*ARGSUSED*/ +static struct tm * +localsub(struct state const *sp, time_t const *timep, int_fast32_t setname, + struct tm *const tmp) +{ + register const struct ttinfo * ttisp; + register int i; + register struct tm * result; + const time_t t = *timep; + + if (sp == NULL) { + /* Don't bother to set tzname etc.; tzset has already done it. */ + return gmtsub(gmtptr, timep, 0, tmp); + } + if ((sp->goback && t < sp->ats[0]) || + (sp->goahead && t > sp->ats[sp->timecnt - 1])) { + time_t newt; + register time_t seconds; + register time_t years; + + if (t < sp->ats[0]) + seconds = sp->ats[0] - t; + else seconds = t - sp->ats[sp->timecnt - 1]; + --seconds; + + /* Beware integer overflow, as SECONDS might + be close to the maximum time_t. */ + years = seconds / SECSPERREPEAT * YEARSPERREPEAT; + seconds = years * AVGSECSPERYEAR; + years += YEARSPERREPEAT; + if (t < sp->ats[0]) + newt = t + seconds + SECSPERREPEAT; + else + newt = t - seconds - SECSPERREPEAT; + + if (newt < sp->ats[0] || + newt > sp->ats[sp->timecnt - 1]) + return NULL; /* "cannot happen" */ + result = localsub(sp, &newt, setname, tmp); + if (result) { +# if defined ckd_add && defined ckd_sub + if (t < sp->ats[0] + ? ckd_sub(&result->tm_year, + result->tm_year, years) + : ckd_add(&result->tm_year, + result->tm_year, years)) + return NULL; +# else + register int_fast64_t newy; + + newy = result->tm_year; + if (t < sp->ats[0]) + newy -= years; + else newy += years; + if (! (INT_MIN <= newy && newy <= INT_MAX)) + return NULL; + result->tm_year = newy; +# endif + } + return result; + } + if (sp->timecnt == 0 || t < sp->ats[0]) { + i = 0; + } else { + register int lo = 1; + register int hi = sp->timecnt; + + while (lo < hi) { + register int mid = (lo + hi) >> 1; + + if (t < sp->ats[mid]) + hi = mid; + else lo = mid + 1; + } + i = sp->types[lo - 1]; + } + ttisp = &sp->ttis[i]; + /* + ** To get (wrong) behavior that's compatible with System V Release 2.0 + ** you'd replace the statement below with + ** t += ttisp->tt_utoff; + ** timesub(&t, 0L, sp, tmp); + */ + result = timesub(&t, ttisp->tt_utoff, sp, tmp); + if (result) { + result->tm_isdst = ttisp->tt_isdst; +# ifdef TM_ZONE + result->TM_ZONE = (char *) &sp->chars[ttisp->tt_desigidx]; +# endif + if (setname) + update_tzname_etc(sp, ttisp); + } + return result; +} +#endif + +#if !USE_TIMEX_T + +# if NETBSD_INSPIRED +struct tm * +localtime_rz(struct state *restrict sp, time_t const *restrict timep, + struct tm *restrict tmp) +{ + return localsub(sp, timep, 0, tmp); +} +# endif + +static struct tm * +localtime_tzset(time_t const *timep, struct tm *tmp, bool setname) +{ + int err = lock(); + if (err) { + errno = err; + return NULL; + } + if (setname || !lcl_is_set) + tzset_unlocked(); + tmp = localsub(lclptr, timep, setname, tmp); + unlock(); + return tmp; +} + +struct tm * +localtime(const time_t *timep) +{ +# if !SUPPORT_C89 + static struct tm tm; +# endif + return localtime_tzset(timep, &tm, true); +} + +struct tm * +localtime_r(const time_t *restrict timep, struct tm *restrict tmp) +{ + return localtime_tzset(timep, tmp, false); +} +#endif + +/* +** gmtsub is to gmtime as localsub is to localtime. +*/ + +static struct tm * +gmtsub(ATTRIBUTE_MAYBE_UNUSED struct state const *sp, time_t const *timep, + int_fast32_t offset, struct tm *tmp) +{ + register struct tm * result; + + result = timesub(timep, offset, gmtptr, tmp); +#ifdef TM_ZONE + /* + ** Could get fancy here and deliver something such as + ** "+xx" or "-xx" if offset is non-zero, + ** but this is no time for a treasure hunt. + */ + tmp->TM_ZONE = ((char *) + (offset ? wildabbr : gmtptr ? gmtptr->chars : utc)); +#endif /* defined TM_ZONE */ + return result; +} + +#if !USE_TIMEX_T + +/* +* Re-entrant version of gmtime. +*/ + +struct tm * +gmtime_r(time_t const *restrict timep, struct tm *restrict tmp) +{ + gmtcheck(); + return gmtsub(gmtptr, timep, 0, tmp); +} + +struct tm * +gmtime(const time_t *timep) +{ +# if !SUPPORT_C89 + static struct tm tm; +# endif + return gmtime_r(timep, &tm); +} + +# if STD_INSPIRED + +/* This function is obsolescent and may disappear in future releases. + Callers can instead use localtime_rz with a fixed-offset zone. */ + +struct tm * +offtime(const time_t *timep, long offset) +{ + gmtcheck(); + +# if !SUPPORT_C89 + static struct tm tm; +# endif + return gmtsub(gmtptr, timep, offset, &tm); +} + +# endif +#endif + +/* +** Return the number of leap years through the end of the given year +** where, to make the math easy, the answer for year zero is defined as zero. +*/ + +static time_t +leaps_thru_end_of_nonneg(time_t y) +{ + return y / 4 - y / 100 + y / 400; +} + +static time_t +leaps_thru_end_of(time_t y) +{ + return (y < 0 + ? -1 - leaps_thru_end_of_nonneg(-1 - y) + : leaps_thru_end_of_nonneg(y)); +} + +static struct tm * +timesub(const time_t *timep, int_fast32_t offset, + const struct state *sp, struct tm *tmp) +{ + register const struct lsinfo * lp; + register time_t tdays; + register const int * ip; + register int_fast32_t corr; + register int i; + int_fast32_t idays, rem, dayoff, dayrem; + time_t y; + + /* If less than SECSPERMIN, the number of seconds since the + most recent positive leap second; otherwise, do not add 1 + to localtime tm_sec because of leap seconds. */ + time_t secs_since_posleap = SECSPERMIN; + + corr = 0; + i = (sp == NULL) ? 0 : sp->leapcnt; + while (--i >= 0) { + lp = &sp->lsis[i]; + if (*timep >= lp->ls_trans) { + corr = lp->ls_corr; + if ((i == 0 ? 0 : lp[-1].ls_corr) < corr) + secs_since_posleap = *timep - lp->ls_trans; + break; + } + } + + /* Calculate the year, avoiding integer overflow even if + time_t is unsigned. */ + tdays = *timep / SECSPERDAY; + rem = *timep % SECSPERDAY; + rem += offset % SECSPERDAY - corr % SECSPERDAY + 3 * SECSPERDAY; + dayoff = offset / SECSPERDAY - corr / SECSPERDAY + rem / SECSPERDAY - 3; + rem %= SECSPERDAY; + /* y = (EPOCH_YEAR + + floor((tdays + dayoff) / DAYSPERREPEAT) * YEARSPERREPEAT), + sans overflow. But calculate against 1570 (EPOCH_YEAR - + YEARSPERREPEAT) instead of against 1970 so that things work + for localtime values before 1970 when time_t is unsigned. */ + dayrem = tdays % DAYSPERREPEAT; + dayrem += dayoff % DAYSPERREPEAT; + y = (EPOCH_YEAR - YEARSPERREPEAT + + ((1 + dayoff / DAYSPERREPEAT + dayrem / DAYSPERREPEAT + - ((dayrem % DAYSPERREPEAT) < 0) + + tdays / DAYSPERREPEAT) + * YEARSPERREPEAT)); + /* idays = (tdays + dayoff) mod DAYSPERREPEAT, sans overflow. */ + idays = tdays % DAYSPERREPEAT; + idays += dayoff % DAYSPERREPEAT + 2 * DAYSPERREPEAT; + idays %= DAYSPERREPEAT; + /* Increase Y and decrease IDAYS until IDAYS is in range for Y. */ + while (year_lengths[isleap(y)] <= idays) { + int tdelta = idays / DAYSPERLYEAR; + int_fast32_t ydelta = tdelta + !tdelta; + time_t newy = y + ydelta; + register int leapdays; + leapdays = leaps_thru_end_of(newy - 1) - + leaps_thru_end_of(y - 1); + idays -= ydelta * DAYSPERNYEAR; + idays -= leapdays; + y = newy; + } + +#ifdef ckd_add + if (ckd_add(&tmp->tm_year, y, -TM_YEAR_BASE)) { + errno = EOVERFLOW; + return NULL; + } +#else + if (!TYPE_SIGNED(time_t) && y < TM_YEAR_BASE) { + int signed_y = y; + tmp->tm_year = signed_y - TM_YEAR_BASE; + } else if ((!TYPE_SIGNED(time_t) || INT_MIN + TM_YEAR_BASE <= y) + && y - TM_YEAR_BASE <= INT_MAX) + tmp->tm_year = y - TM_YEAR_BASE; + else { + errno = EOVERFLOW; + return NULL; + } +#endif + tmp->tm_yday = idays; + /* + ** The "extra" mods below avoid overflow problems. + */ + tmp->tm_wday = (TM_WDAY_BASE + + ((tmp->tm_year % DAYSPERWEEK) + * (DAYSPERNYEAR % DAYSPERWEEK)) + + leaps_thru_end_of(y - 1) + - leaps_thru_end_of(TM_YEAR_BASE - 1) + + idays); + tmp->tm_wday %= DAYSPERWEEK; + if (tmp->tm_wday < 0) + tmp->tm_wday += DAYSPERWEEK; + tmp->tm_hour = rem / SECSPERHOUR; + rem %= SECSPERHOUR; + tmp->tm_min = rem / SECSPERMIN; + tmp->tm_sec = rem % SECSPERMIN; + + /* Use "... ??:??:60" at the end of the localtime minute containing + the second just before the positive leap second. */ + tmp->tm_sec += secs_since_posleap <= tmp->tm_sec; + + ip = mon_lengths[isleap(y)]; + for (tmp->tm_mon = 0; idays >= ip[tmp->tm_mon]; ++(tmp->tm_mon)) + idays -= ip[tmp->tm_mon]; + tmp->tm_mday = idays + 1; + tmp->tm_isdst = 0; +#ifdef TM_GMTOFF + tmp->TM_GMTOFF = offset; +#endif /* defined TM_GMTOFF */ + return tmp; +} + +/* +** Adapted from code provided by Robert Elz, who writes: +** The "best" way to do mktime I think is based on an idea of Bob +** Kridle's (so its said...) from a long time ago. +** It does a binary search of the time_t space. Since time_t's are +** just 32 bits, its a max of 32 iterations (even at 64 bits it +** would still be very reasonable). +*/ + +#ifndef WRONG +# define WRONG (-1) +#endif /* !defined WRONG */ + +/* +** Normalize logic courtesy Paul Eggert. +*/ + +static bool +increment_overflow(int *ip, int j) +{ +#ifdef ckd_add + return ckd_add(ip, *ip, j); +#else + register int const i = *ip; + + /* + ** If i >= 0 there can only be overflow if i + j > INT_MAX + ** or if j > INT_MAX - i; given i >= 0, INT_MAX - i cannot overflow. + ** If i < 0 there can only be overflow if i + j < INT_MIN + ** or if j < INT_MIN - i; given i < 0, INT_MIN - i cannot overflow. + */ + if ((i >= 0) ? (j > INT_MAX - i) : (j < INT_MIN - i)) + return true; + *ip += j; + return false; +#endif +} + +static bool +increment_overflow_time_iinntt(time_t *tp, iinntt j) +{ +#ifdef ckd_add + return ckd_add(tp, *tp, j); +#else + if (j < 0 + ? (TYPE_SIGNED(time_t) ? *tp < TIME_T_MIN - j : *tp <= -1 - j) + : TIME_T_MAX - j < *tp) + return true; + *tp += j; + return false; +#endif +} + +static bool +increment_overflow_time(time_t *tp, int_fast32_t j) +{ +#ifdef ckd_add + return ckd_add(tp, *tp, j); +#else + /* + ** This is like + ** 'if (! (TIME_T_MIN <= *tp + j && *tp + j <= TIME_T_MAX)) ...', + ** except that it does the right thing even if *tp + j would overflow. + */ + if (! (j < 0 + ? (TYPE_SIGNED(time_t) ? TIME_T_MIN - j <= *tp : -1 - j < *tp) + : *tp <= TIME_T_MAX - j)) + return true; + *tp += j; + return false; +#endif +} + +static int +tmcomp(register const struct tm *const atmp, + register const struct tm *const btmp) +{ + register int result; + + if (atmp->tm_year != btmp->tm_year) + return atmp->tm_year < btmp->tm_year ? -1 : 1; + if ((result = (atmp->tm_mon - btmp->tm_mon)) == 0 && + (result = (atmp->tm_mday - btmp->tm_mday)) == 0 && + (result = (atmp->tm_hour - btmp->tm_hour)) == 0 && + (result = (atmp->tm_min - btmp->tm_min)) == 0) + result = atmp->tm_sec - btmp->tm_sec; + return result; +} + +/* Copy to *DEST from *SRC. Copy only the members needed for mktime, + as other members might not be initialized. */ +static void +mktmcpy(struct tm *dest, struct tm const *src) +{ + dest->tm_sec = src->tm_sec; + dest->tm_min = src->tm_min; + dest->tm_hour = src->tm_hour; + dest->tm_mday = src->tm_mday; + dest->tm_mon = src->tm_mon; + dest->tm_year = src->tm_year; + dest->tm_isdst = src->tm_isdst; +#if defined TM_GMTOFF && ! UNINIT_TRAP + dest->TM_GMTOFF = src->TM_GMTOFF; +#endif +} + +static time_t +time2sub(struct tm *const tmp, + struct tm *(*funcp)(struct state const *, time_t const *, + int_fast32_t, struct tm *), + struct state const *sp, + const int_fast32_t offset, + bool *okayp, + bool do_norm_secs) +{ + register int dir; + register int i, j; + register time_t lo; + register time_t hi; + iinntt y, mday, hour, min, saved_seconds; + time_t newt; + time_t t; + struct tm yourtm, mytm; + + *okayp = false; + mktmcpy(&yourtm, tmp); + + min = yourtm.tm_min; + if (do_norm_secs) { + min += yourtm.tm_sec / SECSPERMIN; + yourtm.tm_sec %= SECSPERMIN; + if (yourtm.tm_sec < 0) { + yourtm.tm_sec += SECSPERMIN; + min--; + } + } + + hour = yourtm.tm_hour; + hour += min / MINSPERHOUR; + yourtm.tm_min = min % MINSPERHOUR; + if (yourtm.tm_min < 0) { + yourtm.tm_min += MINSPERHOUR; + hour--; + } + + mday = yourtm.tm_mday; + mday += hour / HOURSPERDAY; + yourtm.tm_hour = hour % HOURSPERDAY; + if (yourtm.tm_hour < 0) { + yourtm.tm_hour += HOURSPERDAY; + mday--; + } + + y = yourtm.tm_year; + y += yourtm.tm_mon / MONSPERYEAR; + yourtm.tm_mon %= MONSPERYEAR; + if (yourtm.tm_mon < 0) { + yourtm.tm_mon += MONSPERYEAR; + y--; + } + + /* + ** Turn y into an actual year number for now. + ** It is converted back to an offset from TM_YEAR_BASE later. + */ + y += TM_YEAR_BASE; + + while (mday <= 0) { + iinntt li = y - (yourtm.tm_mon <= 1); + mday += year_lengths[isleap(li)]; + y--; + } + while (DAYSPERLYEAR < mday) { + iinntt li = y + (1 < yourtm.tm_mon); + mday -= year_lengths[isleap(li)]; + y++; + } + yourtm.tm_mday = mday; + for ( ; ; ) { + i = mon_lengths[isleap(y)][yourtm.tm_mon]; + if (yourtm.tm_mday <= i) + break; + yourtm.tm_mday -= i; + if (++yourtm.tm_mon >= MONSPERYEAR) { + yourtm.tm_mon = 0; + y++; + } + } +#ifdef ckd_add + if (ckd_add(&yourtm.tm_year, y, -TM_YEAR_BASE)) + return WRONG; +#else + y -= TM_YEAR_BASE; + if (! (INT_MIN <= y && y <= INT_MAX)) + return WRONG; + yourtm.tm_year = y; +#endif + if (yourtm.tm_sec >= 0 && yourtm.tm_sec < SECSPERMIN) + saved_seconds = 0; + else if (yourtm.tm_year < EPOCH_YEAR - TM_YEAR_BASE) { + /* + ** We can't set tm_sec to 0, because that might push the + ** time below the minimum representable time. + ** Set tm_sec to 59 instead. + ** This assumes that the minimum representable time is + ** not in the same minute that a leap second was deleted from, + ** which is a safer assumption than using 58 would be. + */ + saved_seconds = yourtm.tm_sec; + saved_seconds -= SECSPERMIN - 1; + yourtm.tm_sec = SECSPERMIN - 1; + } else { + saved_seconds = yourtm.tm_sec; + yourtm.tm_sec = 0; + } + /* + ** Do a binary search (this works whatever time_t's type is). + */ + lo = TIME_T_MIN; + hi = TIME_T_MAX; + for ( ; ; ) { + t = lo / 2 + hi / 2; + if (t < lo) + t = lo; + else if (t > hi) + t = hi; + if (! funcp(sp, &t, offset, &mytm)) { + /* + ** Assume that t is too extreme to be represented in + ** a struct tm; arrange things so that it is less + ** extreme on the next pass. + */ + dir = (t > 0) ? 1 : -1; + } else dir = tmcomp(&mytm, &yourtm); + if (dir != 0) { + if (t == lo) { + if (t == TIME_T_MAX) + return WRONG; + ++t; + ++lo; + } else if (t == hi) { + if (t == TIME_T_MIN) + return WRONG; + --t; + --hi; + } + if (lo > hi) + return WRONG; + if (dir > 0) + hi = t; + else lo = t; + continue; + } +#if defined TM_GMTOFF && ! UNINIT_TRAP + if (mytm.TM_GMTOFF != yourtm.TM_GMTOFF + && (yourtm.TM_GMTOFF < 0 + ? (-SECSPERDAY <= yourtm.TM_GMTOFF + && (mytm.TM_GMTOFF <= + (min(INT_FAST32_MAX, LONG_MAX) + + yourtm.TM_GMTOFF))) + : (yourtm.TM_GMTOFF <= SECSPERDAY + && ((max(INT_FAST32_MIN, LONG_MIN) + + yourtm.TM_GMTOFF) + <= mytm.TM_GMTOFF)))) { + /* MYTM matches YOURTM except with the wrong UT offset. + YOURTM.TM_GMTOFF is plausible, so try it instead. + It's OK if YOURTM.TM_GMTOFF contains uninitialized data, + since the guess gets checked. */ + time_t altt = t; + int_fast32_t diff = mytm.TM_GMTOFF - yourtm.TM_GMTOFF; + if (!increment_overflow_time(&altt, diff)) { + struct tm alttm; + if (funcp(sp, &altt, offset, &alttm) + && alttm.tm_isdst == mytm.tm_isdst + && alttm.TM_GMTOFF == yourtm.TM_GMTOFF + && tmcomp(&alttm, &yourtm) == 0) { + t = altt; + mytm = alttm; + } + } + } +#endif + if (yourtm.tm_isdst < 0 || mytm.tm_isdst == yourtm.tm_isdst) + break; + /* + ** Right time, wrong type. + ** Hunt for right time, right type. + ** It's okay to guess wrong since the guess + ** gets checked. + */ + if (sp == NULL) + return WRONG; + for (i = sp->typecnt - 1; i >= 0; --i) { + if (sp->ttis[i].tt_isdst != yourtm.tm_isdst) + continue; + for (j = sp->typecnt - 1; j >= 0; --j) { + if (sp->ttis[j].tt_isdst == yourtm.tm_isdst) + continue; + if (ttunspecified(sp, j)) + continue; + newt = (t + sp->ttis[j].tt_utoff + - sp->ttis[i].tt_utoff); + if (! funcp(sp, &newt, offset, &mytm)) + continue; + if (tmcomp(&mytm, &yourtm) != 0) + continue; + if (mytm.tm_isdst != yourtm.tm_isdst) + continue; + /* + ** We have a match. + */ + t = newt; + goto label; + } + } + return WRONG; + } +label: + if (increment_overflow_time_iinntt(&t, saved_seconds)) + return WRONG; + if (funcp(sp, &t, offset, tmp)) + *okayp = true; + return t; +} + +static time_t +time2(struct tm * const tmp, + struct tm *(*funcp)(struct state const *, time_t const *, + int_fast32_t, struct tm *), + struct state const *sp, + const int_fast32_t offset, + bool *okayp) +{ + time_t t; + + /* + ** First try without normalization of seconds + ** (in case tm_sec contains a value associated with a leap second). + ** If that fails, try with normalization of seconds. + */ + t = time2sub(tmp, funcp, sp, offset, okayp, false); + return *okayp ? t : time2sub(tmp, funcp, sp, offset, okayp, true); +} + +static time_t +time1(struct tm *const tmp, + struct tm *(*funcp)(struct state const *, time_t const *, + int_fast32_t, struct tm *), + struct state const *sp, + const int_fast32_t offset) +{ + register time_t t; + register int samei, otheri; + register int sameind, otherind; + register int i; + register int nseen; + char seen[TZ_MAX_TYPES]; + unsigned char types[TZ_MAX_TYPES]; + bool okay; + + if (tmp == NULL) { + errno = EINVAL; + return WRONG; + } + if (tmp->tm_isdst > 1) + tmp->tm_isdst = 1; + t = time2(tmp, funcp, sp, offset, &okay); + if (okay) + return t; + if (tmp->tm_isdst < 0) +#ifdef PCTS + /* + ** POSIX Conformance Test Suite code courtesy Grant Sullivan. + */ + tmp->tm_isdst = 0; /* reset to std and try again */ +#else + return t; +#endif /* !defined PCTS */ + /* + ** We're supposed to assume that somebody took a time of one type + ** and did some math on it that yielded a "struct tm" that's bad. + ** We try to divine the type they started from and adjust to the + ** type they need. + */ + if (sp == NULL) + return WRONG; + for (i = 0; i < sp->typecnt; ++i) + seen[i] = false; + nseen = 0; + for (i = sp->timecnt - 1; i >= 0; --i) + if (!seen[sp->types[i]] && !ttunspecified(sp, sp->types[i])) { + seen[sp->types[i]] = true; + types[nseen++] = sp->types[i]; + } + for (sameind = 0; sameind < nseen; ++sameind) { + samei = types[sameind]; + if (sp->ttis[samei].tt_isdst != tmp->tm_isdst) + continue; + for (otherind = 0; otherind < nseen; ++otherind) { + otheri = types[otherind]; + if (sp->ttis[otheri].tt_isdst == tmp->tm_isdst) + continue; + tmp->tm_sec += (sp->ttis[otheri].tt_utoff + - sp->ttis[samei].tt_utoff); + tmp->tm_isdst = !tmp->tm_isdst; + t = time2(tmp, funcp, sp, offset, &okay); + if (okay) + return t; + tmp->tm_sec -= (sp->ttis[otheri].tt_utoff + - sp->ttis[samei].tt_utoff); + tmp->tm_isdst = !tmp->tm_isdst; + } + } + return WRONG; +} + +#if !defined TM_GMTOFF || !USE_TIMEX_T + +static time_t +mktime_tzname(struct state *sp, struct tm *tmp, bool setname) +{ + if (sp) + return time1(tmp, localsub, sp, setname); + else { + gmtcheck(); + return time1(tmp, gmtsub, gmtptr, 0); + } +} + +# if USE_TIMEX_T +static +# endif +time_t +mktime(struct tm *tmp) +{ + time_t t; + int err = lock(); + if (err) { + errno = err; + return -1; + } + tzset_unlocked(); + t = mktime_tzname(lclptr, tmp, true); + unlock(); + return t; +} + +#endif + +#if NETBSD_INSPIRED && !USE_TIMEX_T +time_t +mktime_z(struct state *restrict sp, struct tm *restrict tmp) +{ + return mktime_tzname(sp, tmp, false); +} +#endif + +#if STD_INSPIRED && !USE_TIMEX_T +/* This function is obsolescent and may disappear in future releases. + Callers can instead use mktime. */ +time_t +timelocal(struct tm *tmp) +{ + if (tmp != NULL) + tmp->tm_isdst = -1; /* in case it wasn't initialized */ + return mktime(tmp); +} +#endif + +#if defined TM_GMTOFF || !USE_TIMEX_T + +# ifndef EXTERN_TIMEOFF +# ifndef timeoff +# define timeoff my_timeoff /* Don't collide with OpenBSD 7.4 . */ +# endif +# define EXTERN_TIMEOFF static +# endif + +/* This function is obsolescent and may disappear in future releases. + Callers can instead use mktime_z with a fixed-offset zone. */ +EXTERN_TIMEOFF time_t +timeoff(struct tm *tmp, long offset) +{ + if (tmp) + tmp->tm_isdst = 0; + gmtcheck(); + return time1(tmp, gmtsub, gmtptr, offset); +} +#endif + +#if !USE_TIMEX_T +time_t +timegm(struct tm *tmp) +{ + time_t t; + struct tm tmcpy; + mktmcpy(&tmcpy, tmp); + tmcpy.tm_wday = -1; + t = timeoff(&tmcpy, 0); + if (0 <= tmcpy.tm_wday) + *tmp = tmcpy; + return t; +} +#endif + +static int_fast32_t +leapcorr(struct state const *sp, time_t t) +{ + register struct lsinfo const * lp; + register int i; + + i = sp->leapcnt; + while (--i >= 0) { + lp = &sp->lsis[i]; + if (t >= lp->ls_trans) + return lp->ls_corr; + } + return 0; +} + +/* +** XXX--is the below the right way to conditionalize?? +*/ + +#if !USE_TIMEX_T +# if STD_INSPIRED + +/* NETBSD_INSPIRED_EXTERN functions are exported to callers if + NETBSD_INSPIRED is defined, and are private otherwise. */ +# if NETBSD_INSPIRED +# define NETBSD_INSPIRED_EXTERN +# else +# define NETBSD_INSPIRED_EXTERN static +# endif + +/* +** IEEE Std 1003.1 (POSIX) says that 536457599 +** shall correspond to "Wed Dec 31 23:59:59 UTC 1986", which +** is not the case if we are accounting for leap seconds. +** So, we provide the following conversion routines for use +** when exchanging timestamps with POSIX conforming systems. +*/ + +NETBSD_INSPIRED_EXTERN time_t +time2posix_z(struct state *sp, time_t t) +{ + return t - leapcorr(sp, t); +} + +time_t +time2posix(time_t t) +{ + int err = lock(); + if (err) { + errno = err; + return -1; + } + if (!lcl_is_set) + tzset_unlocked(); + if (lclptr) + t = time2posix_z(lclptr, t); + unlock(); + return t; +} + +NETBSD_INSPIRED_EXTERN time_t +posix2time_z(struct state *sp, time_t t) +{ + time_t x; + time_t y; + /* + ** For a positive leap second hit, the result + ** is not unique. For a negative leap second + ** hit, the corresponding time doesn't exist, + ** so we return an adjacent second. + */ + x = t + leapcorr(sp, t); + y = x - leapcorr(sp, x); + if (y < t) { + do { + x++; + y = x - leapcorr(sp, x); + } while (y < t); + x -= y != t; + } else if (y > t) { + do { + --x; + y = x - leapcorr(sp, x); + } while (y > t); + x += y != t; + } + return x; +} + +time_t +posix2time(time_t t) +{ + int err = lock(); + if (err) { + errno = err; + return -1; + } + if (!lcl_is_set) + tzset_unlocked(); + if (lclptr) + t = posix2time_z(lclptr, t); + unlock(); + return t; +} + +# endif /* STD_INSPIRED */ + +# if TZ_TIME_T + +# if !USG_COMPAT +# define timezone 0 +# endif + +/* Convert from the underlying system's time_t to the ersatz time_tz, + which is called 'time_t' in this file. Typically, this merely + converts the time's integer width. On some platforms, the system + time is local time not UT, or uses some epoch other than the POSIX + epoch. + + Although this code appears to define a function named 'time' that + returns time_t, the macros in private.h cause this code to actually + define a function named 'tz_time' that returns tz_time_t. The call + to sys_time invokes the underlying system's 'time' function. */ + +time_t +time(time_t *p) +{ + time_t r = sys_time(0); + if (r != (time_t) -1) { + iinntt offset = EPOCH_LOCAL ? timezone : 0; + if (offset < IINNTT_MIN + EPOCH_OFFSET + || increment_overflow_time_iinntt(&r, offset - EPOCH_OFFSET)) { + errno = EOVERFLOW; + r = -1; + } + } + if (p) + *p = r; + return r; +} + +# endif +#endif diff --git a/source/os/src/timezone/private.h b/source/os/src/timezone/private.h new file mode 100644 index 0000000000..bdd0001395 --- /dev/null +++ b/source/os/src/timezone/private.h @@ -0,0 +1,1129 @@ +/* Private header for tzdb code. */ + +#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! +*/ + +/* PORT_TO_C89 means the code should work even if the underlying + compiler and library support only C89 plus C99's 'long long' + and perhaps a few other extensions to C89. + + This macro is obsolescent, and the plan is to remove it along with + associated code. A good time to do that might be in the year 2029 + because RHEL 7 (whose GCC defaults to C89) extended life cycle + support (ELS) is scheduled to end on 2028-06-30. */ +#ifndef PORT_TO_C89 +# define PORT_TO_C89 0 +#endif + +/* SUPPORT_C89 means the tzcode library should support C89 callers + in addition to the usual support for C99-and-later callers. + This defaults to 1 as POSIX requires, even though that can trigger + latent bugs in callers. */ +#ifndef SUPPORT_C89 +# define SUPPORT_C89 1 +#endif + +#ifndef __STDC_VERSION__ +# define __STDC_VERSION__ 0 +#endif + +/* Define true, false and bool if they don't work out of the box. */ +#if PORT_TO_C89 && __STDC_VERSION__ < 199901 +# define true 1 +# define false 0 +# define bool int +#elif __STDC_VERSION__ < 202311 +# include +#endif + +#if __STDC_VERSION__ < 202311 +# undef static_assert +# define static_assert(cond) extern int static_assert_check[(cond) ? 1 : -1] +#endif + +/* +** 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" + +/* +** Defaults for preprocessor symbols. +** You can override these in your C compiler options, e.g. '-DHAVE_GETTEXT=1'. +*/ + +#if !defined HAVE__GENERIC && defined __has_extension +# if !__has_extension(c_generic_selections) +# define HAVE__GENERIC 0 +# endif +#endif +/* _Generic is buggy in pre-4.9 GCC. */ +#if !defined HAVE__GENERIC && defined __GNUC__ && !defined __STRICT_ANSI__ +# define HAVE__GENERIC (4 < __GNUC__ + (9 <= __GNUC_MINOR__)) +#endif +#ifndef HAVE__GENERIC +# define HAVE__GENERIC (201112 <= __STDC_VERSION__) +#endif + +#if !defined HAVE_GETTEXT && defined __has_include +# if __has_include() +# define HAVE_GETTEXT true +# endif +#endif +#ifndef HAVE_GETTEXT +# define HAVE_GETTEXT false +#endif + +#ifndef HAVE_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_SETENV +# define HAVE_SETENV 1 +#endif + +#ifndef HAVE_STRDUP +# define HAVE_STRDUP 1 +#endif + +#ifndef HAVE_SYMLINK +# define HAVE_SYMLINK 1 +#endif /* !defined HAVE_SYMLINK */ + +#if !defined HAVE_SYS_STAT_H && defined __has_include +# if !__has_include() +# define HAVE_SYS_STAT_H false +# endif +#endif +#ifndef HAVE_SYS_STAT_H +# define HAVE_SYS_STAT_H true +#endif + +#if !defined HAVE_UNISTD_H && defined __has_include +# if !__has_include() +# define HAVE_UNISTD_H false +# endif +#endif +#ifndef HAVE_UNISTD_H +# define HAVE_UNISTD_H true +#endif + +#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, 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 + +/* On GNUish systems where time_t might be 32 or 64 bits, use 64. + On these platforms _FILE_OFFSET_BITS must also be 64; otherwise + setting _TIME_BITS to 64 does not work. The code does not + otherwise rely on _FILE_OFFSET_BITS being 64, since it does not + use off_t or functions like 'stat' that depend on off_t. */ +#ifndef _TIME_BITS +# ifndef _FILE_OFFSET_BITS +# define _FILE_OFFSET_BITS 64 +# endif +# if _FILE_OFFSET_BITS == 64 +# define _TIME_BITS 64 +# endif +#endif + +/* +** Nested includes +*/ + +/* 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 +#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 +#include +#if !PORT_TO_C89 +# include +#endif +#include /* for CHAR_BIT et al. */ +#include + +#include + +#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 + +#if HAVE_GETTEXT +# include +#endif /* HAVE_GETTEXT */ + +#if HAVE_UNISTD_H +# include /* for R_OK, and other POSIX goodness */ +#endif /* HAVE_UNISTD_H */ + +/* SUPPORT_POSIX2008 means the tzcode library should support + POSIX.1-2017-and-earlier callers in addition to the usual support for + POSIX.1-2024-and-later callers; however, this can be + incompatible with POSIX.1-2024-and-later callers. + This macro is obsolescent, and the plan is to remove it + along with any code needed only when it is nonzero. + A good time to do that might be in the year 2034. + This macro's name is SUPPORT_POSIX2008 because _POSIX_VERSION == 200809 + in POSIX.1-2017, a minor revision of POSIX.1-2008. */ +#ifndef SUPPORT_POSIX2008 +# if defined _POSIX_VERSION && _POSIX_VERSION <= 200809 +# define SUPPORT_POSIX2008 1 +# else +# define SUPPORT_POSIX2008 0 +# endif +#endif + +#ifndef HAVE_DECL_ASCTIME_R +# if SUPPORT_POSIX2008 +# define HAVE_DECL_ASCTIME_R 1 +# else +# define HAVE_DECL_ASCTIME_R 0 +# endif +#endif + +#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 +#endif /* !defined R_OK */ + +#if PORT_TO_C89 + +/* +** Define HAVE_STDINT_H's default value here, rather than at the +** 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. +*/ +#if !defined HAVE_STDINT_H && defined __has_include +# define HAVE_STDINT_H true /* C23 __has_include implies C99 stdint.h. */ +#endif +#ifndef HAVE_STDINT_H +# 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 +#endif /* !HAVE_STDINT_H */ + +#ifndef HAVE_INTTYPES_H +# define HAVE_INTTYPES_H HAVE_STDINT_H +#endif +#if HAVE_INTTYPES_H +# include +#endif + +/* Pre-C99 GCC compilers define __LONG_LONG_MAX__ instead of LLONG_MAX. */ +#if defined __LONG_LONG_MAX__ && !defined __STRICT_ANSI__ +# ifndef LLONG_MAX +# define LLONG_MAX __LONG_LONG_MAX__ +# endif +# ifndef LLONG_MIN +# define LLONG_MIN (-1 - LLONG_MAX) +# endif +# ifndef ULLONG_MAX +# define ULLONG_MAX (LLONG_MAX * 2ull + 1) +# endif +#endif + +#ifndef INT_FAST64_MAX +# if 1 <= LONG_MAX >> 31 >> 31 +typedef long int_fast64_t; +# define INT_FAST64_MIN LONG_MIN +# define INT_FAST64_MAX LONG_MAX +# else +/* If this fails, compile with -DHAVE_STDINT_H or with a better compiler. */ +typedef long long int_fast64_t; +# define INT_FAST64_MIN LLONG_MIN +# define INT_FAST64_MAX LLONG_MAX +# endif +#endif + +#ifndef PRIdFAST64 +# if INT_FAST64_MAX == LONG_MAX +# define PRIdFAST64 "ld" +# else +# define PRIdFAST64 "lld" +# 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; +# ifndef HAVE_STRTOLL +# define HAVE_STRTOLL true +# endif +# 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 PTRDIFF_MAX +# define PTRDIFF_MAX MAXVAL(ptrdiff_t, TYPE_BIT(ptrdiff_t)) +#endif + +#ifndef UINT_FAST32_MAX +typedef unsigned long uint_fast32_t; +#endif + +#ifndef UINT_FAST64_MAX +# if 3 <= ULONG_MAX >> 31 >> 31 +typedef unsigned long uint_fast64_t; +# define UINT_FAST64_MAX ULONG_MAX +# else +/* If this fails, compile with -DHAVE_STDINT_H or with a better compiler. */ +typedef unsigned long long uint_fast64_t; +# define UINT_FAST64_MAX ULLONG_MAX +# endif +#endif + +#ifndef UINTMAX_MAX +# ifdef ULLONG_MAX +typedef unsigned long long uintmax_t; +# define UINTMAX_MAX ULLONG_MAX +# else +typedef unsigned long uintmax_t; +# define UINTMAX_MAX ULONG_MAX +# endif +#endif + +#ifndef PRIuMAX +# ifdef ULLONG_MAX +# define PRIuMAX "llu" +# else +# define PRIuMAX "lu" +# endif +#endif + +#ifndef SIZE_MAX +# define SIZE_MAX ((size_t) -1) +#endif + +#endif /* PORT_TO_C89 */ + +/* The maximum size of any created object, as a signed integer. + Although the C standard does not outright prohibit larger objects, + behavior is undefined if the result of pointer subtraction does not + fit into ptrdiff_t, and the code assumes in several places that + pointer subtraction works. As a practical matter it's OK to not + support objects larger than this. */ +#define INDEX_MAX ((ptrdiff_t) min(PTRDIFF_MAX, SIZE_MAX)) + +/* Support ckd_add, ckd_sub, ckd_mul on C23 or recent-enough GCC-like + hosts, unless compiled with -DHAVE_STDCKDINT_H=0 or with pre-C23 EDG. */ +#if !defined HAVE_STDCKDINT_H && defined __has_include +# if __has_include() +# define HAVE_STDCKDINT_H true +# endif +#endif +#ifdef HAVE_STDCKDINT_H +# if HAVE_STDCKDINT_H +# include +# endif +#elif defined __EDG__ +/* Do nothing, to work around EDG bug . */ +#elif defined __has_builtin +# if __has_builtin(__builtin_add_overflow) +# define ckd_add(r, a, b) __builtin_add_overflow(a, b, r) +# endif +# if __has_builtin(__builtin_sub_overflow) +# define ckd_sub(r, a, b) __builtin_sub_overflow(a, b, r) +# endif +# if __has_builtin(__builtin_mul_overflow) +# define ckd_mul(r, a, b) __builtin_mul_overflow(a, b, r) +# endif +#elif 7 <= __GNUC__ +# define ckd_add(r, a, b) __builtin_add_overflow(a, b, r) +# define ckd_sub(r, a, b) __builtin_sub_overflow(a, b, r) +# define ckd_mul(r, a, b) __builtin_mul_overflow(a, b, r) +#endif + +#if (defined __has_c_attribute \ + && (202311 <= __STDC_VERSION__ || !defined __STRICT_ANSI__)) +# define HAVE___HAS_C_ATTRIBUTE true +#else +# define HAVE___HAS_C_ATTRIBUTE false +#endif + +#if HAVE___HAS_C_ATTRIBUTE +# if __has_c_attribute(deprecated) +# define ATTRIBUTE_DEPRECATED [[deprecated]] +# endif +#endif +#ifndef ATTRIBUTE_DEPRECATED +# if 3 < __GNUC__ + (2 <= __GNUC_MINOR__) +# define ATTRIBUTE_DEPRECATED __attribute__((deprecated)) +# else +# define ATTRIBUTE_DEPRECATED /* empty */ +# endif +#endif + +#if HAVE___HAS_C_ATTRIBUTE +# if __has_c_attribute(fallthrough) +# define ATTRIBUTE_FALLTHROUGH [[fallthrough]] +# endif +#endif +#ifndef ATTRIBUTE_FALLTHROUGH +# if 7 <= __GNUC__ +# define ATTRIBUTE_FALLTHROUGH __attribute__((fallthrough)) +# else +# define ATTRIBUTE_FALLTHROUGH ((void) 0) +# endif +#endif + +#if HAVE___HAS_C_ATTRIBUTE +# if __has_c_attribute(maybe_unused) +# define ATTRIBUTE_MAYBE_UNUSED [[maybe_unused]] +# endif +#endif +#ifndef ATTRIBUTE_MAYBE_UNUSED +# if 2 < __GNUC__ + (7 <= __GNUC_MINOR__) +# define ATTRIBUTE_MAYBE_UNUSED __attribute__((unused)) +# else +# define ATTRIBUTE_MAYBE_UNUSED /* empty */ +# endif +#endif + +#if HAVE___HAS_C_ATTRIBUTE +# if __has_c_attribute(noreturn) +# define ATTRIBUTE_NORETURN [[noreturn]] +# endif +#endif +#ifndef ATTRIBUTE_NORETURN +# if 201112 <= __STDC_VERSION__ +# define ATTRIBUTE_NORETURN _Noreturn +# elif 2 < __GNUC__ + (8 <= __GNUC_MINOR__) +# define ATTRIBUTE_NORETURN __attribute__((noreturn)) +# else +# define ATTRIBUTE_NORETURN /* empty */ +# endif +#endif + +#if HAVE___HAS_C_ATTRIBUTE +# if __has_c_attribute(reproducible) +# define ATTRIBUTE_REPRODUCIBLE [[reproducible]] +# endif +#endif +#ifndef ATTRIBUTE_REPRODUCIBLE +# define ATTRIBUTE_REPRODUCIBLE /* empty */ +#endif + +#if HAVE___HAS_C_ATTRIBUTE +# if __has_c_attribute(unsequenced) +# define ATTRIBUTE_UNSEQUENCED [[unsequenced]] +# endif +#endif +#ifndef ATTRIBUTE_UNSEQUENCED +# define ATTRIBUTE_UNSEQUENCED /* empty */ +#endif + +/* GCC attributes that are useful in tzcode. + __attribute__((const)) is stricter than [[unsequenced]], + so the latter is an adequate substitute in non-GCC C23 platforms. + __attribute__((pure)) is stricter than [[reproducible]], + so the latter is an adequate substitute in non-GCC C23 platforms. */ +#if __GNUC__ < 3 +# define ATTRIBUTE_CONST ATTRIBUTE_UNSEQUENCED +# define ATTRIBUTE_FORMAT(spec) /* empty */ +# define ATTRIBUTE_PURE ATTRIBUTE_REPRODUCIBLE +#else +# define ATTRIBUTE_CONST __attribute__((const)) +# define ATTRIBUTE_FORMAT(spec) __attribute__((format spec)) +# define ATTRIBUTE_PURE __attribute__((pure)) +#endif + +/* Avoid GCC bug 114833 . + Remove this macro and its uses when the bug is fixed in a GCC release, + because only the latest GCC matters for $(GCC_DEBUG_FLAGS). */ +#ifdef GCC_LINT +# define ATTRIBUTE_PURE_114833 ATTRIBUTE_PURE +#else +# define ATTRIBUTE_PURE_114833 /* empty */ +#endif + +#if (__STDC_VERSION__ < 199901 && !defined restrict \ + && (PORT_TO_C89 || defined _MSC_VER)) +# define restrict /* empty */ +#endif + +/* +** Workarounds for compilers/systems. +*/ + +#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 + +#ifdef time_tz +# define defined_time_tz true +#else +# define defined_time_tz false +#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 +** 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 + +#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 ctime +# define ctime tz_ctime +# 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 SUPPORT_POSIX2008 +# undef asctime_r +# define asctime_r tz_asctime_r +# undef ctime_r +# define ctime_r tz_ctime_r +# endif +# 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 + +# if __STDC_VERSION__ < 202311 +# define DEPRECATED_IN_C23 /* empty */ +# else +# define DEPRECATED_IN_C23 ATTRIBUTE_DEPRECATED +# endif +DEPRECATED_IN_C23 char *asctime(struct tm const *); +DEPRECATED_IN_C23 char *ctime(time_t const *); +#if SUPPORT_POSIX2008 +char *asctime_r(struct tm const *restrict, char *restrict); +char *ctime_r(time_t const *, char *); +#endif +ATTRIBUTE_CONST double difftime(time_t, time_t); +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 *); +time_t timegm(struct tm *); +void tzset(void); +#endif + +#ifndef HAVE_DECL_TIMEGM +# if (202311 <= __STDC_VERSION__ \ + || defined __GLIBC__ || defined __tm_zone /* musl */ \ + || defined __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__ \ + || (defined __APPLE__ && defined __MACH__)) +# define HAVE_DECL_TIMEGM true +# else +# define HAVE_DECL_TIMEGM false +# endif +#endif +#if !HAVE_DECL_TIMEGM && !defined timegm +time_t timegm(struct tm *); +#endif + +#if !HAVE_DECL_ASCTIME_R && !defined asctime_r && SUPPORT_POSIX2008 +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 + +/* +** The STD_INSPIRED functions are similar, but most also need +** declarations if time_tz is defined. +*/ + +#ifndef STD_INSPIRED +# define STD_INSPIRED 0 +#endif +#if STD_INSPIRED +# if TZ_TIME_T || !defined offtime +struct tm *offtime(time_t const *, long); +# endif +# if TZ_TIME_T || !defined timelocal +time_t timelocal(struct tm *); +# endif +# if TZ_TIME_T || !defined timeoff +# define EXTERN_TIMEOFF +# 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 + +/* Infer TM_ZONE on systems where this information is known, but suppress + guessing if NO_TM_ZONE is defined. Similarly for TM_GMTOFF. */ +#if (200809 < _POSIX_VERSION \ + || defined __GLIBC__ \ + || defined __tm_zone /* musl */ \ + || 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); +# if STD_INSPIRED +# if TZ_TIME_T || !defined posix2time_z +ATTRIBUTE_PURE time_t posix2time_z(timezone_t, time_t); +# endif +# if TZ_TIME_T || !defined time2posix_z +ATTRIBUTE_PURE time_t time2posix_z(timezone_t, time_t); +# endif +# endif +#endif + +/* +** Finally, some convenience items. +*/ + +#define TYPE_BIT(type) (CHAR_BIT * (ptrdiff_t) sizeof(type)) +#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) +enum { SIGNED_PADDING_CHECK_NEEDED + = _Generic((time_t) 0, + signed char: false, short: false, + int: false, long: false, long long: false, + default: true) }; +#else +# define TIME_T_MIN TIME_T_MIN_NO_PADDING +# define TIME_T_MAX TIME_T_MAX_NO_PADDING +enum { SIGNED_PADDING_CHECK_NEEDED = true }; +#endif +/* Try to check the padding assumptions. Although TIME_T_MAX and the + following check can both have undefined behavior on oddball + platforms due to shifts exceeding widths of signed integers, these + platforms' compilers are likely to diagnose these issues in integer + constant expressions, so it shouldn't hurt to check statically. */ +static_assert(! TYPE_SIGNED(time_t) || ! SIGNED_PADDING_CHECK_NEEDED + || TIME_T_MAX >> (TYPE_BIT(time_t) - 2) == 1); + +/* If true, the value returned by an idealized unlimited-range mktime + always fits into an integer type with bounds MIN and MAX. + If false, the value might not fit. + This macro is usable in #if if its arguments are. + Add or subtract 2**31 - 1 for the maximum UT offset allowed in a TZif file, + divide by the maximum number of non-leap seconds in a year, + divide again by two just to be safe, + and account for the tm_year origin (1900) and time_t origin (1970). */ +#define MKTIME_FITS_IN(min, max) \ + ((min) < 0 \ + && ((min) + 0x7fffffff) / 366 / 24 / 60 / 60 / 2 + 1970 - 1900 < INT_MIN \ + && INT_MAX < ((max) - 0x7fffffff) / 366 / 24 / 60 / 60 / 2 + 1970 - 1900) + +/* MKTIME_MIGHT_OVERFLOW is true if mktime can fail due to time_t overflow + or if it is not known whether mktime can fail, + and is false if mktime definitely cannot fail. + This macro is usable in #if, and so does not use TIME_T_MAX or sizeof. + If the builder has not configured this macro, guess based on what + known platforms do. When in doubt, guess true. */ +#ifndef MKTIME_MIGHT_OVERFLOW +# if defined __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__ +# include +# endif +# if ((/* The following heuristics assume native time_t. */ \ + defined_time_tz) \ + || ((/* Traditional time_t is 'long', so if 'long' is not wide enough \ + assume overflow unless we're on a known-safe host. */ \ + !MKTIME_FITS_IN(LONG_MIN, LONG_MAX)) \ + && (/* GNU C Library 2.29 (2019-02-01) and later has 64-bit time_t \ + if __TIMESIZE is 64. */ \ + !defined __TIMESIZE || __TIMESIZE < 64) \ + && (/* FreeBSD 12 r320347 (__FreeBSD_version 1200036; 2017-06-26), \ + and later has 64-bit time_t on all platforms but i386 which \ + is currently scheduled for end-of-life on 2028-11-30. */ \ + !defined __FreeBSD_version || __FreeBSD_version < 1200036 \ + || defined __i386) \ + && (/* NetBSD 6.0 (2012-10-17) and later has 64-bit time_t. */ \ + !defined __NetBSD_Version__ || __NetBSD_Version__ < 600000000) \ + && (/* OpenBSD 5.5 (2014-05-01) and later has 64-bit time_t. */ \ + !defined OpenBSD || OpenBSD < 201405))) +# define MKTIME_MIGHT_OVERFLOW true +# else +# define MKTIME_MIGHT_OVERFLOW false +# endif +#endif +/* Check that MKTIME_MIGHT_OVERFLOW is consistent with time_t's range. */ +static_assert(MKTIME_MIGHT_OVERFLOW + || MKTIME_FITS_IN(TIME_T_MIN, TIME_T_MAX)); + +/* +** 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)) + +/* +** INITIALIZE(x) +*/ + +#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 + +/* strftime.c sometimes needs access to timeoff if it is not already public. + tz_private_timeoff should be used only by localtime.c and strftime.c. */ +#if (!defined EXTERN_TIMEOFF && ! (defined USE_TIMEX_T && USE_TIMEX_T) \ + && defined TM_GMTOFF && (200809 < _POSIX_VERSION || ! UNINIT_TRAP)) +# ifndef timeoff +# define timeoff tz_private_timeoff +# endif +# define EXTERN_TIMEOFF +#endif +#ifdef EXTERN_TIMEOFF +time_t timeoff(struct tm *, long); +#endif + +#ifdef DEBUG +# undef unreachable +# define unreachable() abort() +#elif !defined unreachable +# ifdef __has_builtin +# if __has_builtin(__builtin_unreachable) +# define unreachable() __builtin_unreachable() +# endif +# elif 4 < __GNUC__ + (5 <= __GNUC_MINOR__) +# define unreachable() __builtin_unreachable() +# endif +# ifndef unreachable +# define unreachable() ((void) 0) +# endif +#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. +*/ + +#if HAVE_GETTEXT +#define _(msgid) gettext(msgid) +#else /* !HAVE_GETTEXT */ +#define _(msgid) msgid +#endif /* !HAVE_GETTEXT */ + +#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 *restrict, char *restrict); +char *ctime_r(time_t const *, char *); +#endif /* HAVE_INCOMPATIBLE_CTIME_R */ + +/* 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) + +/* How many years to generate (in zic.c) or search through (in localtime.c). + This is two years larger than the obvious 400, to avoid edge cases. + E.g., suppose a rule applies from 2012 on with transitions + in March and September, plus one-off transitions in November 2013, + and suppose the rule cannot be expressed as a proleptic TZ string. + If zic looked only at the last 400 years, it would set max_year=2413, + with the intent that the 400 years 2014 through 2413 will be repeated. + The last transition listed in the tzfile would be in 2413-09, + less than 400 years after the last one-off transition in 2013-11. + Two years is not overkill for localtime.c, as a one-year bump + would mishandle 2023d's America/Ciudad_Juarez for November 2422. */ +enum { years_of_observations = YEARSPERREPEAT + 2 }; + +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)) + +/* +** 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. +*/ + +#define isleap_sum(a, b) isleap((a) % 400 + (b) % 400) + +#endif /* !defined PRIVATE_H */ diff --git a/source/os/src/timezone/strftime.c b/source/os/src/timezone/strftime.c new file mode 100644 index 0000000000..7be94de303 --- /dev/null +++ b/source/os/src/timezone/strftime.c @@ -0,0 +1,662 @@ +/* Convert a broken-down timestamp to a string. */ + +/* Copyright 1989 The Regents of the University of California. + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + 1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + 3. Neither the name of the University nor the names of its contributors + may be used to endorse or promote products derived from this software + without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND + ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + SUCH DAMAGE. */ + +/* +** Based on the UCB version with the copyright notice appearing above. +** +** This is ANSIish only when "multibyte character == plain character". +*/ + +#include "private.h" + +#include +#include +#include + +#if MKTIME_MIGHT_OVERFLOW +/* Do this after system includes as it redefines time_t, mktime, timeoff. */ +# define USE_TIMEX_T true +# include "localtime.c" +#endif + +#ifndef DEPRECATE_TWO_DIGIT_YEARS +# define DEPRECATE_TWO_DIGIT_YEARS false +#endif + +struct lc_time_T { + const char * mon[MONSPERYEAR]; + const char * month[MONSPERYEAR]; + const char * wday[DAYSPERWEEK]; + const char * weekday[DAYSPERWEEK]; + const char * X_fmt; + const char * x_fmt; + const char * c_fmt; + const char * am; + const char * pm; + const char * date_fmt; +}; + +static const struct lc_time_T C_time_locale = { + { + "Jan", "Feb", "Mar", "Apr", "May", "Jun", + "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" + }, { + "January", "February", "March", "April", "May", "June", + "July", "August", "September", "October", "November", "December" + }, { + "Sun", "Mon", "Tue", "Wed", + "Thu", "Fri", "Sat" + }, { + "Sunday", "Monday", "Tuesday", "Wednesday", + "Thursday", "Friday", "Saturday" + }, + + /* X_fmt */ + "%H:%M:%S", + + /* + ** x_fmt + ** C99 and later require this format. + ** Using just numbers (as here) makes Quakers happier; + ** it's also compatible with SVR4. + */ + "%m/%d/%y", + + /* + ** c_fmt + ** C99 and later require this format. + ** Previously this code used "%D %X", but we now conform to C99. + ** Note that + ** "%a %b %d %H:%M:%S %Y" + ** is used by Solaris 2.3. + */ + "%a %b %e %T %Y", + + /* am */ + "AM", + + /* pm */ + "PM", + + /* date_fmt */ + "%a %b %e %H:%M:%S %Z %Y" +}; + +enum warn { IN_NONE, IN_SOME, IN_THIS, IN_ALL }; + +static char * _add(const char *, char *, const char *); +static char * _conv(int, const char *, char *, const char *); +static char * _fmt(const char *, const struct tm *, char *, const char *, + enum warn *); +static char * _yconv(int, int, bool, bool, char *, char const *); + +#ifndef YEAR_2000_NAME +# define YEAR_2000_NAME "CHECK_STRFTIME_FORMATS_FOR_TWO_DIGIT_YEARS" +#endif /* !defined YEAR_2000_NAME */ + +#if HAVE_STRFTIME_L +size_t +strftime_l(char *restrict s, size_t maxsize, char const *restrict format, + struct tm const *restrict t, + ATTRIBUTE_MAYBE_UNUSED locale_t locale) +{ + /* Just call strftime, as only the C locale is supported. */ + return strftime(s, maxsize, format, t); +} +#endif + +size_t +strftime(char *restrict s, size_t maxsize, char const *restrict format, + struct tm const *restrict t) +{ + char * p; + int saved_errno = errno; + enum warn warn = IN_NONE; + + tzset(); + p = _fmt(format, t, s, s + maxsize, &warn); + if (DEPRECATE_TWO_DIGIT_YEARS + && warn != IN_NONE && getenv(YEAR_2000_NAME)) { + fprintf(stderr, "\n"); + fprintf(stderr, "strftime format \"%s\" ", format); + fprintf(stderr, "yields only two digits of years in "); + if (warn == IN_SOME) + fprintf(stderr, "some locales"); + else if (warn == IN_THIS) + fprintf(stderr, "the current locale"); + else fprintf(stderr, "all locales"); + fprintf(stderr, "\n"); + } + if (p == s + maxsize) { + errno = ERANGE; + return 0; + } + *p = '\0'; + errno = saved_errno; + return p - s; +} + +static char * +_fmt(const char *format, const struct tm *t, char *pt, + const char *ptlim, enum warn *warnp) +{ + struct lc_time_T const *Locale = &C_time_locale; + + for ( ; *format; ++format) { + if (*format == '%') { +label: + switch (*++format) { + default: + /* Output unknown conversion specifiers as-is, + to aid debugging. This includes '%' at + format end. This conforms to C23 section + 7.29.3.5 paragraph 6, which says behavior + is undefined here. */ + --format; + break; + case 'A': + pt = _add((t->tm_wday < 0 || + t->tm_wday >= DAYSPERWEEK) ? + "?" : Locale->weekday[t->tm_wday], + pt, ptlim); + continue; + case 'a': + pt = _add((t->tm_wday < 0 || + t->tm_wday >= DAYSPERWEEK) ? + "?" : Locale->wday[t->tm_wday], + pt, ptlim); + continue; + case 'B': + pt = _add((t->tm_mon < 0 || + t->tm_mon >= MONSPERYEAR) ? + "?" : Locale->month[t->tm_mon], + pt, ptlim); + continue; + case 'b': + case 'h': + pt = _add((t->tm_mon < 0 || + t->tm_mon >= MONSPERYEAR) ? + "?" : Locale->mon[t->tm_mon], + pt, ptlim); + continue; + case 'C': + /* + ** %C used to do a... + ** _fmt("%a %b %e %X %Y", t); + ** ...whereas now POSIX 1003.2 calls for + ** something completely different. + ** (ado, 1993-05-24) + */ + pt = _yconv(t->tm_year, TM_YEAR_BASE, + true, false, pt, ptlim); + continue; + case 'c': + { + enum warn warn2 = IN_SOME; + + pt = _fmt(Locale->c_fmt, t, pt, ptlim, &warn2); + if (warn2 == IN_ALL) + warn2 = IN_THIS; + if (warn2 > *warnp) + *warnp = warn2; + } + continue; + case 'D': + pt = _fmt("%m/%d/%y", t, pt, ptlim, warnp); + continue; + case 'd': + pt = _conv(t->tm_mday, "%02d", pt, ptlim); + continue; + case 'E': + case 'O': + /* + ** Locale modifiers of C99 and later. + ** The sequences + ** %Ec %EC %Ex %EX %Ey %EY + ** %Od %oe %OH %OI %Om %OM + ** %OS %Ou %OU %OV %Ow %OW %Oy + ** are supposed to provide alternative + ** representations. + */ + goto label; + case 'e': + pt = _conv(t->tm_mday, "%2d", pt, ptlim); + continue; + case 'F': + pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp); + continue; + case 'H': + pt = _conv(t->tm_hour, "%02d", pt, ptlim); + continue; + case 'I': + pt = _conv((t->tm_hour % 12) ? + (t->tm_hour % 12) : 12, + "%02d", pt, ptlim); + continue; + case 'j': + pt = _conv(t->tm_yday + 1, "%03d", pt, ptlim); + continue; + case 'k': + /* + ** This used to be... + ** _conv(t->tm_hour % 12 ? + ** t->tm_hour % 12 : 12, 2, ' '); + ** ...and has been changed to the below to + ** match SunOS 4.1.1 and Arnold Robbins' + ** strftime version 3.0. That is, "%k" and + ** "%l" have been swapped. + ** (ado, 1993-05-24) + */ + pt = _conv(t->tm_hour, "%2d", pt, ptlim); + continue; +#ifdef KITCHEN_SINK + case 'K': + /* + ** After all this time, still unclaimed! + */ + pt = _add("kitchen sink", pt, ptlim); + continue; +#endif /* defined KITCHEN_SINK */ + case 'l': + /* + ** This used to be... + ** _conv(t->tm_hour, 2, ' '); + ** ...and has been changed to the below to + ** match SunOS 4.1.1 and Arnold Robbin's + ** strftime version 3.0. That is, "%k" and + ** "%l" have been swapped. + ** (ado, 1993-05-24) + */ + pt = _conv((t->tm_hour % 12) ? + (t->tm_hour % 12) : 12, + "%2d", pt, ptlim); + continue; + case 'M': + pt = _conv(t->tm_min, "%02d", pt, ptlim); + continue; + case 'm': + pt = _conv(t->tm_mon + 1, "%02d", pt, ptlim); + continue; + case 'n': + pt = _add("\n", pt, ptlim); + continue; + case 'p': + pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ? + Locale->pm : + Locale->am, + pt, ptlim); + continue; + case 'R': + pt = _fmt("%H:%M", t, pt, ptlim, warnp); + continue; + case 'r': + pt = _fmt("%I:%M:%S %p", t, pt, ptlim, warnp); + continue; + case 'S': + pt = _conv(t->tm_sec, "%02d", pt, ptlim); + continue; + case 's': + { + struct tm tm; + char buf[INT_STRLEN_MAXIMUM( + time_t) + 1]; + time_t mkt; + + tm.tm_sec = t->tm_sec; + tm.tm_min = t->tm_min; + tm.tm_hour = t->tm_hour; + tm.tm_mday = t->tm_mday; + tm.tm_mon = t->tm_mon; + tm.tm_year = t->tm_year; + + /* Get the time_t value for TM. + Native time_t, or its redefinition + by localtime.c above, is wide enough + so that this cannot overflow. */ +#ifdef TM_GMTOFF + mkt = timeoff(&tm, t->TM_GMTOFF); +#else + tm.tm_isdst = t->tm_isdst; + mkt = mktime(&tm); +#endif + if (TYPE_SIGNED(time_t)) { + intmax_t n = mkt; + sprintf(buf, "%"PRIdMAX, n); + } else { + uintmax_t n = mkt; + sprintf(buf, "%"PRIuMAX, n); + } + pt = _add(buf, pt, ptlim); + } + continue; + case 'T': + pt = _fmt("%H:%M:%S", t, pt, ptlim, warnp); + continue; + case 't': + pt = _add("\t", pt, ptlim); + continue; + case 'U': + pt = _conv((t->tm_yday + DAYSPERWEEK - + t->tm_wday) / DAYSPERWEEK, + "%02d", pt, ptlim); + continue; + case 'u': + /* + ** From Arnold Robbins' strftime version 3.0: + ** "ISO 8601: Weekday as a decimal number + ** [1 (Monday) - 7]" + ** (ado, 1993-05-24) + */ + pt = _conv((t->tm_wday == 0) ? + DAYSPERWEEK : t->tm_wday, + "%d", pt, ptlim); + continue; + case 'V': /* ISO 8601 week number */ + case 'G': /* ISO 8601 year (four digits) */ + case 'g': /* ISO 8601 year (two digits) */ +/* +** From Arnold Robbins' strftime version 3.0: "the week number of the +** year (the first Monday as the first day of week 1) as a decimal number +** (01-53)." +** (ado, 1993-05-24) +** +** From by Markus Kuhn: +** "Week 01 of a year is per definition the first week which has the +** Thursday in this year, which is equivalent to the week which contains +** the fourth day of January. In other words, the first week of a new year +** is the week which has the majority of its days in the new year. Week 01 +** might also contain days from the previous year and the week before week +** 01 of a year is the last week (52 or 53) of the previous year even if +** it contains days from the new year. A week starts with Monday (day 1) +** and ends with Sunday (day 7). For example, the first week of the year +** 1997 lasts from 1996-12-30 to 1997-01-05..." +** (ado, 1996-01-02) +*/ + { + int year; + int base; + int yday; + int wday; + int w; + + year = t->tm_year; + base = TM_YEAR_BASE; + yday = t->tm_yday; + wday = t->tm_wday; + for ( ; ; ) { + int len; + int bot; + int top; + + len = isleap_sum(year, base) ? + DAYSPERLYEAR : + DAYSPERNYEAR; + /* + ** What yday (-3 ... 3) does + ** the ISO year begin on? + */ + bot = ((yday + 11 - wday) % + DAYSPERWEEK) - 3; + /* + ** What yday does the NEXT + ** ISO year begin on? + */ + top = bot - + (len % DAYSPERWEEK); + if (top < -3) + top += DAYSPERWEEK; + top += len; + if (yday >= top) { + ++base; + w = 1; + break; + } + if (yday >= bot) { + w = 1 + ((yday - bot) / + DAYSPERWEEK); + break; + } + --base; + yday += isleap_sum(year, base) ? + DAYSPERLYEAR : + DAYSPERNYEAR; + } +#ifdef XPG4_1994_04_09 + if ((w == 52 && + t->tm_mon == TM_JANUARY) || + (w == 1 && + t->tm_mon == TM_DECEMBER)) + w = 53; +#endif /* defined XPG4_1994_04_09 */ + if (*format == 'V') + pt = _conv(w, "%02d", + pt, ptlim); + else if (*format == 'g') { + *warnp = IN_ALL; + pt = _yconv(year, base, + false, true, + pt, ptlim); + } else pt = _yconv(year, base, + true, true, + pt, ptlim); + } + continue; + case 'v': + /* + ** From Arnold Robbins' strftime version 3.0: + ** "date as dd-bbb-YYYY" + ** (ado, 1993-05-24) + */ + pt = _fmt("%e-%b-%Y", t, pt, ptlim, warnp); + continue; + case 'W': + pt = _conv((t->tm_yday + DAYSPERWEEK - + (t->tm_wday ? + (t->tm_wday - 1) : + (DAYSPERWEEK - 1))) / DAYSPERWEEK, + "%02d", pt, ptlim); + continue; + case 'w': + pt = _conv(t->tm_wday, "%d", pt, ptlim); + continue; + case 'X': + pt = _fmt(Locale->X_fmt, t, pt, ptlim, warnp); + continue; + case 'x': + { + enum warn warn2 = IN_SOME; + + pt = _fmt(Locale->x_fmt, t, pt, ptlim, &warn2); + if (warn2 == IN_ALL) + warn2 = IN_THIS; + if (warn2 > *warnp) + *warnp = warn2; + } + continue; + case 'y': + *warnp = IN_ALL; + pt = _yconv(t->tm_year, TM_YEAR_BASE, + false, true, + pt, ptlim); + continue; + case 'Y': + pt = _yconv(t->tm_year, TM_YEAR_BASE, + true, true, + pt, ptlim); + continue; + case 'Z': +#ifdef TM_ZONE + pt = _add(t->TM_ZONE, pt, ptlim); +#elif HAVE_TZNAME + if (t->tm_isdst >= 0) + pt = _add(tzname[t->tm_isdst != 0], + pt, ptlim); +#endif + /* + ** C99 and later say that %Z must be + ** replaced by the empty string if the + ** time zone abbreviation is not + ** determinable. + */ + continue; + case 'z': +#if defined TM_GMTOFF || USG_COMPAT || ALTZONE + { + long diff; + char const * sign; + bool negative; + +# ifdef TM_GMTOFF + diff = t->TM_GMTOFF; +# else + /* + ** C99 and later say that the UT offset must + ** be computed by looking only at + ** tm_isdst. This requirement is + ** incorrect, since it means the code + ** must rely on magic (in this case + ** altzone and timezone), and the + ** magic might not have the correct + ** offset. Doing things correctly is + ** tricky and requires disobeying the standard; + ** see GNU C strftime for details. + ** For now, punt and conform to the + ** standard, even though it's incorrect. + ** + ** C99 and later say that %z must be replaced by + ** the empty string if the time zone is not + ** determinable, so output nothing if the + ** appropriate variables are not available. + */ + if (t->tm_isdst < 0) + continue; + if (t->tm_isdst == 0) +# if USG_COMPAT + diff = -timezone; +# else + continue; +# endif + else +# if ALTZONE + diff = -altzone; +# else + continue; +# endif +# endif + negative = diff < 0; + if (diff == 0) { +# ifdef TM_ZONE + negative = t->TM_ZONE[0] == '-'; +# else + negative = t->tm_isdst < 0; +# if HAVE_TZNAME + if (tzname[t->tm_isdst != 0][0] == '-') + negative = true; +# endif +# endif + } + if (negative) { + sign = "-"; + diff = -diff; + } else sign = "+"; + pt = _add(sign, pt, ptlim); + diff /= SECSPERMIN; + diff = (diff / MINSPERHOUR) * 100 + + (diff % MINSPERHOUR); + pt = _conv(diff, "%04d", pt, ptlim); + } +#endif + continue; + case '+': + pt = _fmt(Locale->date_fmt, t, pt, ptlim, + warnp); + continue; + case '%': + break; + } + } + if (pt == ptlim) + break; + *pt++ = *format; + } + return pt; +} + +static char * +_conv(int n, const char *format, char *pt, const char *ptlim) +{ + char buf[INT_STRLEN_MAXIMUM(int) + 1]; + + sprintf(buf, format, n); + return _add(buf, pt, ptlim); +} + +static char * +_add(const char *str, char *pt, const char *ptlim) +{ + while (pt < ptlim && (*pt = *str++) != '\0') + ++pt; + return pt; +} + +/* +** POSIX and the C Standard are unclear or inconsistent about +** what %C and %y do if the year is negative or exceeds 9999. +** Use the convention that %C concatenated with %y yields the +** same output as %Y, and that %Y contains at least 4 bytes, +** with more only if necessary. +*/ + +static char * +_yconv(int a, int b, bool convert_top, bool convert_yy, + char *pt, const char *ptlim) +{ + register int lead; + register int trail; + + int DIVISOR = 100; + trail = a % DIVISOR + b % DIVISOR; + lead = a / DIVISOR + b / DIVISOR + trail / DIVISOR; + trail %= DIVISOR; + if (trail < 0 && lead > 0) { + trail += DIVISOR; + --lead; + } else if (lead < 0 && trail > 0) { + trail -= DIVISOR; + ++lead; + } + if (convert_top) { + if (lead == 0 && trail < 0) + pt = _add("-0", pt, ptlim); + else pt = _conv(lead, "%02d", pt, ptlim); + } + if (convert_yy) + pt = _conv(((trail < 0) ? -trail : trail), "%02d", pt, ptlim); + return pt; +} diff --git a/source/os/src/timezone/tzdir.h b/source/os/src/timezone/tzdir.h new file mode 100644 index 0000000000..dc5668ec39 --- /dev/null +++ b/source/os/src/timezone/tzdir.h @@ -0,0 +1,6 @@ +#ifndef TZDEFAULT +# define TZDEFAULT "/etc/localtime" /* default zone */ +#endif +#ifndef TZDIR +# define TZDIR "/Users/mingmingwanng/source_code/TDengine/debug/build/share/timezone/" /* TZif directory */ +#endif diff --git a/source/os/src/timezone/tzfile.h b/source/os/src/timezone/tzfile.h new file mode 100644 index 0000000000..f8c6c8c550 --- /dev/null +++ b/source/os/src/timezone/tzfile.h @@ -0,0 +1,121 @@ +/* Layout and location of TZif files. */ + +#ifndef TZFILE_H + +#define TZFILE_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! +*/ + +/* +** Information about time zone files. +*/ + +#ifndef TZDEFRULES +# define TZDEFRULES "posixrules" +#endif /* !defined TZDEFRULES */ + + +/* See Internet RFC 9636 for more details about the following format. */ + +/* +** Each file begins with. . . +*/ + +#define TZ_MAGIC "TZif" + +struct tzhead { + char tzh_magic[4]; /* TZ_MAGIC */ + char tzh_version[1]; /* '\0' or '2'-'4' as of 2021 */ + char tzh_reserved[15]; /* reserved; must be zero */ + char tzh_ttisutcnt[4]; /* coded number of trans. time flags */ + char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ + char tzh_leapcnt[4]; /* coded number of leap seconds */ + char tzh_timecnt[4]; /* coded number of transition times */ + char tzh_typecnt[4]; /* coded number of local time types */ + char tzh_charcnt[4]; /* coded number of abbr. chars */ +}; + +/* +** . . .followed by. . . +** +** tzh_timecnt (char [4])s coded transition times a la time(2) +** tzh_timecnt (unsigned char)s types of local time starting at above +** tzh_typecnt repetitions of +** one (char [4]) coded UT offset in seconds +** one (unsigned char) used to set tm_isdst +** one (unsigned char) that's an abbreviation list index +** tzh_charcnt (char)s '\0'-terminated zone abbreviations +** tzh_leapcnt repetitions of +** one (char [4]) coded leap second transition times +** one (char [4]) total correction after above +** tzh_ttisstdcnt (char)s indexed by type; if 1, transition +** time is standard time, if 0, +** transition time is local (wall clock) +** time; if absent, transition times are +** assumed to be local time +** tzh_ttisutcnt (char)s indexed by type; if 1, transition +** time is UT, if 0, transition time is +** local time; if absent, transition +** times are assumed to be local time. +** When this is 1, the corresponding +** std/wall indicator must also be 1. +*/ + +/* +** If tzh_version is '2' or greater, the above is followed by a second instance +** of tzhead and a second instance of the data in which each coded transition +** time uses 8 rather than 4 chars, +** then a POSIX.1-2017 proleptic TZ string for use in handling +** instants after the last transition time stored in the file +** (with nothing between the newlines if there is no POSIX.1-2017 +** representation for such instants). +** +** If tz_version is '3' or greater, the TZ string can be any POSIX.1-2024 +** proleptic TZ string, which means the above is extended as follows. +** First, the TZ string's hour offset may range from -167 +** through 167 as compared to the range 0 through 24 required +** by POSIX.1-2017 and earlier. +** Second, its DST start time may be January 1 at 00:00 and its stop +** time December 31 at 24:00 plus the difference between DST and +** standard time, indicating DST all year. +*/ + +/* +** In the current implementation, "tzset()" refuses to deal with files that +** exceed any of the limits below. +*/ + +#ifndef TZ_MAX_TIMES +/* This must be at least 242 for Europe/London with 'zic -b fat'. */ +# define TZ_MAX_TIMES 2000 +#endif /* !defined TZ_MAX_TIMES */ + +#ifndef TZ_MAX_TYPES +/* This must be at least 18 for Europe/Vilnius with 'zic -b fat'. */ +# define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ +#endif /* !defined TZ_MAX_TYPES */ + +#ifndef TZ_MAX_CHARS +/* This must be at least 40 for America/Anchorage. */ +# define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ + /* (limited by what unsigned chars can hold) */ +#endif /* !defined TZ_MAX_CHARS */ + +#ifndef TZ_MAX_LEAPS +/* This must be at least 27 for leap seconds from 1972 through mid-2023. + There's a plan to discontinue leap seconds by 2035. */ +# define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ +#endif /* !defined TZ_MAX_LEAPS */ + +#endif /* !defined TZFILE_H */ diff --git a/utils/test/c/timezone_test.c b/utils/test/c/timezone_test.c index f8bedc62cc..5a3fa87976 100644 --- a/utils/test/c/timezone_test.c +++ b/utils/test/c/timezone_test.c @@ -78,7 +78,6 @@ void timezone_insert_test(){ /* select today(); - select cast(1 as timestamp) + '2013-04-12T10:52:01'; tsConver.sim "COMPACT DATABASE test START WITH '2023-03-07 14:01:23' END WITH '2023-03-08 14:01:23'" TK_TIMEZONE