diff options
Diffstat (limited to 'intl/icu/source/common/putil.cpp')
| -rw-r--r-- | intl/icu/source/common/putil.cpp | 2506 |
1 files changed, 2506 insertions, 0 deletions
diff --git a/intl/icu/source/common/putil.cpp b/intl/icu/source/common/putil.cpp new file mode 100644 index 0000000000..ab25f3b996 --- /dev/null +++ b/intl/icu/source/common/putil.cpp @@ -0,0 +1,2506 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +****************************************************************************** +* +* Copyright (C) 1997-2016, International Business Machines +* Corporation and others. All Rights Reserved. +* +****************************************************************************** +* +* FILE NAME : putil.c (previously putil.cpp and ptypes.cpp) +* +* Date Name Description +* 04/14/97 aliu Creation. +* 04/24/97 aliu Added getDefaultDataDirectory() and +* getDefaultLocaleID(). +* 04/28/97 aliu Rewritten to assume Unix and apply general methods +* for assumed case. Non-UNIX platforms must be +* special-cased. Rewrote numeric methods dealing +* with NaN and Infinity to be platform independent +* over all IEEE 754 platforms. +* 05/13/97 aliu Restored sign of timezone +* (semantics are hours West of GMT) +* 06/16/98 erm Added IEEE_754 stuff, cleaned up isInfinite, isNan, +* nextDouble.. +* 07/22/98 stephen Added remainder, max, min, trunc +* 08/13/98 stephen Added isNegativeInfinity, isPositiveInfinity +* 08/24/98 stephen Added longBitsFromDouble +* 09/08/98 stephen Minor changes for Mac Port +* 03/02/99 stephen Removed openFile(). Added AS400 support. +* Fixed EBCDIC tables +* 04/15/99 stephen Converted to C. +* 06/28/99 stephen Removed mutex locking in u_isBigEndian(). +* 08/04/99 jeffrey R. Added OS/2 changes +* 11/15/99 helena Integrated S/390 IEEE support. +* 04/26/01 Barry N. OS/400 support for uprv_getDefaultLocaleID +* 08/15/01 Steven H. OS/400 support for uprv_getDefaultCodepage +* 01/03/08 Steven L. Fake Time Support +****************************************************************************** +*/ + +// Defines _XOPEN_SOURCE for access to POSIX functions. +// Must be before any other #includes. +#include "uposixdefs.h" + +// First, the platform type. Need this for U_PLATFORM. +#include "unicode/platform.h" + +#if U_PLATFORM == U_PF_MINGW && defined __STRICT_ANSI__ +/* tzset isn't defined in strict ANSI on MinGW. */ +#undef __STRICT_ANSI__ +#endif + +/* + * Cygwin with GCC requires inclusion of time.h after the above disabling strict asci mode statement. + */ +#include <time.h> + +#if !U_PLATFORM_USES_ONLY_WIN32_API +#include <sys/time.h> +#endif + +/* include the rest of the ICU headers */ +#include "unicode/putil.h" +#include "unicode/ustring.h" +#include "putilimp.h" +#include "uassert.h" +#include "umutex.h" +#include "cmemory.h" +#include "cstring.h" +#include "locmap.h" +#include "ucln_cmn.h" +#include "charstr.h" + +/* Include standard headers. */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <math.h> +#include <locale.h> +#include <float.h> + +#ifndef U_COMMON_IMPLEMENTATION +#error U_COMMON_IMPLEMENTATION not set - must be set for all ICU source files in common/ - see https://unicode-org.github.io/icu/userguide/howtouseicu +#endif + + +/* include system headers */ +#if U_PLATFORM_USES_ONLY_WIN32_API + /* + * TODO: U_PLATFORM_USES_ONLY_WIN32_API includes MinGW. + * Should Cygwin be included as well (U_PLATFORM_HAS_WIN32_API) + * to use native APIs as much as possible? + */ +#ifndef WIN32_LEAN_AND_MEAN +# define WIN32_LEAN_AND_MEAN +#endif +# define VC_EXTRALEAN +# define NOUSER +# define NOSERVICE +# define NOIME +# define NOMCX +# include <windows.h> +# include "unicode/uloc.h" +# include "wintz.h" +#elif U_PLATFORM == U_PF_OS400 +# include <float.h> +# include <qusec.h> /* error code structure */ +# include <qusrjobi.h> +# include <qliept.h> /* EPT_CALL macro - this include must be after all other "QSYSINCs" */ +# include <mih/testptr.h> /* For uprv_maximumPtr */ +#elif U_PLATFORM == U_PF_OS390 +# include "unicode/ucnv.h" /* Needed for UCNV_SWAP_LFNL_OPTION_STRING */ +#elif U_PLATFORM_IS_DARWIN_BASED || U_PLATFORM_IS_LINUX_BASED || U_PLATFORM == U_PF_BSD || U_PLATFORM == U_PF_SOLARIS +# include <limits.h> +# include <unistd.h> +# if U_PLATFORM == U_PF_SOLARIS +# ifndef _XPG4_2 +# define _XPG4_2 +# endif +# elif U_PLATFORM == U_PF_ANDROID +# include <sys/system_properties.h> +# include <dlfcn.h> +# endif +#elif U_PLATFORM == U_PF_QNX +# include <sys/neutrino.h> +#endif + + +/* + * Only include langinfo.h if we have a way to get the codeset. If we later + * depend on more feature, we can test on U_HAVE_NL_LANGINFO. + * + */ + +#if U_HAVE_NL_LANGINFO_CODESET +#include <langinfo.h> +#endif + +/** + * Simple things (presence of functions, etc) should just go in configure.in and be added to + * icucfg.h via autoheader. + */ +#if U_PLATFORM_IMPLEMENTS_POSIX +# if U_PLATFORM == U_PF_OS400 +# define HAVE_DLFCN_H 0 +# define HAVE_DLOPEN 0 +# else +# ifndef HAVE_DLFCN_H +# define HAVE_DLFCN_H 1 +# endif +# ifndef HAVE_DLOPEN +# define HAVE_DLOPEN 1 +# endif +# endif +# ifndef HAVE_GETTIMEOFDAY +# define HAVE_GETTIMEOFDAY 1 +# endif +#else +# define HAVE_DLFCN_H 0 +# define HAVE_DLOPEN 0 +# define HAVE_GETTIMEOFDAY 0 +#endif + +U_NAMESPACE_USE + +/* Define the extension for data files, again... */ +#define DATA_TYPE "dat" + +/* Leave this copyright notice here! */ +static const char copyright[] = U_COPYRIGHT_STRING; + +/* floating point implementations ------------------------------------------- */ + +/* We return QNAN rather than SNAN*/ +#define SIGN 0x80000000U + +/* Make it easy to define certain types of constants */ +typedef union { + int64_t i64; /* This must be defined first in order to allow the initialization to work. This is a C89 feature. */ + double d64; +} BitPatternConversion; +static const BitPatternConversion gNan = { (int64_t) INT64_C(0x7FF8000000000000) }; +static const BitPatternConversion gInf = { (int64_t) INT64_C(0x7FF0000000000000) }; + +/*--------------------------------------------------------------------------- + Platform utilities + Our general strategy is to assume we're on a POSIX platform. Platforms which + are non-POSIX must declare themselves so. The default POSIX implementation + will sometimes work for non-POSIX platforms as well (e.g., the NaN-related + functions). + ---------------------------------------------------------------------------*/ + +#if U_PLATFORM_USES_ONLY_WIN32_API || U_PLATFORM == U_PF_OS400 +# undef U_POSIX_LOCALE +#else +# define U_POSIX_LOCALE 1 +#endif + +/* + WARNING! u_topNBytesOfDouble and u_bottomNBytesOfDouble + can't be properly optimized by the gcc compiler sometimes (i.e. gcc 3.2). +*/ +#if !IEEE_754 +static char* +u_topNBytesOfDouble(double* d, int n) +{ +#if U_IS_BIG_ENDIAN + return (char*)d; +#else + return (char*)(d + 1) - n; +#endif +} + +static char* +u_bottomNBytesOfDouble(double* d, int n) +{ +#if U_IS_BIG_ENDIAN + return (char*)(d + 1) - n; +#else + return (char*)d; +#endif +} +#endif /* !IEEE_754 */ + +#if IEEE_754 +static UBool +u_signBit(double d) { + uint8_t hiByte; +#if U_IS_BIG_ENDIAN + hiByte = *(uint8_t *)&d; +#else + hiByte = *(((uint8_t *)&d) + sizeof(double) - 1); +#endif + return (hiByte & 0x80) != 0; +} +#endif + + + +#if defined (U_DEBUG_FAKETIME) +/* Override the clock to test things without having to move the system clock. + * Assumes POSIX gettimeofday() will function + */ +UDate fakeClock_t0 = 0; /** Time to start the clock from **/ +UDate fakeClock_dt = 0; /** Offset (fake time - real time) **/ +UBool fakeClock_set = false; /** True if fake clock has spun up **/ + +static UDate getUTCtime_real() { + struct timeval posixTime; + gettimeofday(&posixTime, nullptr); + return (UDate)(((int64_t)posixTime.tv_sec * U_MILLIS_PER_SECOND) + (posixTime.tv_usec/1000)); +} + +static UDate getUTCtime_fake() { + static UMutex fakeClockMutex; + umtx_lock(&fakeClockMutex); + if(!fakeClock_set) { + UDate real = getUTCtime_real(); + const char *fake_start = getenv("U_FAKETIME_START"); + if((fake_start!=nullptr) && (fake_start[0]!=0)) { + sscanf(fake_start,"%lf",&fakeClock_t0); + fakeClock_dt = fakeClock_t0 - real; + fprintf(stderr,"U_DEBUG_FAKETIME was set at compile time, so the ICU clock will start at a preset value\n" + "env variable U_FAKETIME_START=%.0f (%s) for an offset of %.0f ms from the current time %.0f\n", + fakeClock_t0, fake_start, fakeClock_dt, real); + } else { + fakeClock_dt = 0; + fprintf(stderr,"U_DEBUG_FAKETIME was set at compile time, but U_FAKETIME_START was not set.\n" + "Set U_FAKETIME_START to the number of milliseconds since 1/1/1970 to set the ICU clock.\n"); + } + fakeClock_set = true; + } + umtx_unlock(&fakeClockMutex); + + return getUTCtime_real() + fakeClock_dt; +} +#endif + +#if U_PLATFORM_USES_ONLY_WIN32_API +typedef union { + int64_t int64; + FILETIME fileTime; +} FileTimeConversion; /* This is like a ULARGE_INTEGER */ + +/* Number of 100 nanoseconds from 1/1/1601 to 1/1/1970 */ +#define EPOCH_BIAS INT64_C(116444736000000000) +#define HECTONANOSECOND_PER_MILLISECOND 10000 + +#endif + +/*--------------------------------------------------------------------------- + Universal Implementations + These are designed to work on all platforms. Try these, and if they + don't work on your platform, then special case your platform with new + implementations. +---------------------------------------------------------------------------*/ + +U_CAPI UDate U_EXPORT2 +uprv_getUTCtime() +{ +#if defined(U_DEBUG_FAKETIME) + return getUTCtime_fake(); /* Hook for overriding the clock */ +#else + return uprv_getRawUTCtime(); +#endif +} + +/* Return UTC (GMT) time measured in milliseconds since 0:00 on 1/1/70.*/ +U_CAPI UDate U_EXPORT2 +uprv_getRawUTCtime() +{ +#if U_PLATFORM_USES_ONLY_WIN32_API + + FileTimeConversion winTime; + GetSystemTimeAsFileTime(&winTime.fileTime); + return (UDate)((winTime.int64 - EPOCH_BIAS) / HECTONANOSECOND_PER_MILLISECOND); +#else + +#if HAVE_GETTIMEOFDAY + struct timeval posixTime; + gettimeofday(&posixTime, nullptr); + return (UDate)(((int64_t)posixTime.tv_sec * U_MILLIS_PER_SECOND) + (posixTime.tv_usec/1000)); +#else + time_t epochtime; + time(&epochtime); + return (UDate)epochtime * U_MILLIS_PER_SECOND; +#endif + +#endif +} + +/*----------------------------------------------------------------------------- + IEEE 754 + These methods detect and return NaN and infinity values for doubles + conforming to IEEE 754. Platforms which support this standard include X86, + Mac 680x0, Mac PowerPC, AIX RS/6000, and most others. + If this doesn't work on your platform, you have non-IEEE floating-point, and + will need to code your own versions. A naive implementation is to return 0.0 + for getNaN and getInfinity, and false for isNaN and isInfinite. + ---------------------------------------------------------------------------*/ + +U_CAPI UBool U_EXPORT2 +uprv_isNaN(double number) +{ +#if IEEE_754 + BitPatternConversion convertedNumber; + convertedNumber.d64 = number; + /* Infinity is 0x7FF0000000000000U. Anything greater than that is a NaN */ + return (UBool)((convertedNumber.i64 & U_INT64_MAX) > gInf.i64); + +#elif U_PLATFORM == U_PF_OS390 + uint32_t highBits = *(uint32_t*)u_topNBytesOfDouble(&number, + sizeof(uint32_t)); + uint32_t lowBits = *(uint32_t*)u_bottomNBytesOfDouble(&number, + sizeof(uint32_t)); + + return ((highBits & 0x7F080000L) == 0x7F080000L) && + (lowBits == 0x00000000L); + +#else + /* If your platform doesn't support IEEE 754 but *does* have an NaN value,*/ + /* you'll need to replace this default implementation with what's correct*/ + /* for your platform.*/ + return number != number; +#endif +} + +U_CAPI UBool U_EXPORT2 +uprv_isInfinite(double number) +{ +#if IEEE_754 + BitPatternConversion convertedNumber; + convertedNumber.d64 = number; + /* Infinity is exactly 0x7FF0000000000000U. */ + return (UBool)((convertedNumber.i64 & U_INT64_MAX) == gInf.i64); +#elif U_PLATFORM == U_PF_OS390 + uint32_t highBits = *(uint32_t*)u_topNBytesOfDouble(&number, + sizeof(uint32_t)); + uint32_t lowBits = *(uint32_t*)u_bottomNBytesOfDouble(&number, + sizeof(uint32_t)); + + return ((highBits & ~SIGN) == 0x70FF0000L) && (lowBits == 0x00000000L); + +#else + /* If your platform doesn't support IEEE 754 but *does* have an infinity*/ + /* value, you'll need to replace this default implementation with what's*/ + /* correct for your platform.*/ + return number == (2.0 * number); +#endif +} + +U_CAPI UBool U_EXPORT2 +uprv_isPositiveInfinity(double number) +{ +#if IEEE_754 || U_PLATFORM == U_PF_OS390 + return (UBool)(number > 0 && uprv_isInfinite(number)); +#else + return uprv_isInfinite(number); +#endif +} + +U_CAPI UBool U_EXPORT2 +uprv_isNegativeInfinity(double number) +{ +#if IEEE_754 || U_PLATFORM == U_PF_OS390 + return (UBool)(number < 0 && uprv_isInfinite(number)); + +#else + uint32_t highBits = *(uint32_t*)u_topNBytesOfDouble(&number, + sizeof(uint32_t)); + return((highBits & SIGN) && uprv_isInfinite(number)); + +#endif +} + +U_CAPI double U_EXPORT2 +uprv_getNaN() +{ +#if IEEE_754 || U_PLATFORM == U_PF_OS390 + return gNan.d64; +#else + /* If your platform doesn't support IEEE 754 but *does* have an NaN value,*/ + /* you'll need to replace this default implementation with what's correct*/ + /* for your platform.*/ + return 0.0; +#endif +} + +U_CAPI double U_EXPORT2 +uprv_getInfinity() +{ +#if IEEE_754 || U_PLATFORM == U_PF_OS390 + return gInf.d64; +#else + /* If your platform doesn't support IEEE 754 but *does* have an infinity*/ + /* value, you'll need to replace this default implementation with what's*/ + /* correct for your platform.*/ + return 0.0; +#endif +} + +U_CAPI double U_EXPORT2 +uprv_floor(double x) +{ + return floor(x); +} + +U_CAPI double U_EXPORT2 +uprv_ceil(double x) +{ + return ceil(x); +} + +U_CAPI double U_EXPORT2 +uprv_round(double x) +{ + return uprv_floor(x + 0.5); +} + +U_CAPI double U_EXPORT2 +uprv_fabs(double x) +{ + return fabs(x); +} + +U_CAPI double U_EXPORT2 +uprv_modf(double x, double* y) +{ + return modf(x, y); +} + +U_CAPI double U_EXPORT2 +uprv_fmod(double x, double y) +{ + return fmod(x, y); +} + +U_CAPI double U_EXPORT2 +uprv_pow(double x, double y) +{ + /* This is declared as "double pow(double x, double y)" */ + return pow(x, y); +} + +U_CAPI double U_EXPORT2 +uprv_pow10(int32_t x) +{ + return pow(10.0, (double)x); +} + +U_CAPI double U_EXPORT2 +uprv_fmax(double x, double y) +{ +#if IEEE_754 + /* first handle NaN*/ + if(uprv_isNaN(x) || uprv_isNaN(y)) + return uprv_getNaN(); + + /* check for -0 and 0*/ + if(x == 0.0 && y == 0.0 && u_signBit(x)) + return y; + +#endif + + /* this should work for all flt point w/o NaN and Inf special cases */ + return (x > y ? x : y); +} + +U_CAPI double U_EXPORT2 +uprv_fmin(double x, double y) +{ +#if IEEE_754 + /* first handle NaN*/ + if(uprv_isNaN(x) || uprv_isNaN(y)) + return uprv_getNaN(); + + /* check for -0 and 0*/ + if(x == 0.0 && y == 0.0 && u_signBit(y)) + return y; + +#endif + + /* this should work for all flt point w/o NaN and Inf special cases */ + return (x > y ? y : x); +} + +U_CAPI UBool U_EXPORT2 +uprv_add32_overflow(int32_t a, int32_t b, int32_t* res) { + // NOTE: Some compilers (GCC, Clang) have primitives available, like __builtin_add_overflow. + // This function could be optimized by calling one of those primitives. + auto a64 = static_cast<int64_t>(a); + auto b64 = static_cast<int64_t>(b); + int64_t res64 = a64 + b64; + *res = static_cast<int32_t>(res64); + return res64 != *res; +} + +U_CAPI UBool U_EXPORT2 +uprv_mul32_overflow(int32_t a, int32_t b, int32_t* res) { + // NOTE: Some compilers (GCC, Clang) have primitives available, like __builtin_mul_overflow. + // This function could be optimized by calling one of those primitives. + auto a64 = static_cast<int64_t>(a); + auto b64 = static_cast<int64_t>(b); + int64_t res64 = a64 * b64; + *res = static_cast<int32_t>(res64); + return res64 != *res; +} + +/** + * Truncates the given double. + * trunc(3.3) = 3.0, trunc (-3.3) = -3.0 + * This is different than calling floor() or ceil(): + * floor(3.3) = 3, floor(-3.3) = -4 + * ceil(3.3) = 4, ceil(-3.3) = -3 + */ +U_CAPI double U_EXPORT2 +uprv_trunc(double d) +{ +#if IEEE_754 + /* handle error cases*/ + if(uprv_isNaN(d)) + return uprv_getNaN(); + if(uprv_isInfinite(d)) + return uprv_getInfinity(); + + if(u_signBit(d)) /* Signbit() picks up -0.0; d<0 does not. */ + return ceil(d); + else + return floor(d); + +#else + return d >= 0 ? floor(d) : ceil(d); + +#endif +} + +/** + * Return the largest positive number that can be represented by an integer + * type of arbitrary bit length. + */ +U_CAPI double U_EXPORT2 +uprv_maxMantissa() +{ + return pow(2.0, DBL_MANT_DIG + 1.0) - 1.0; +} + +U_CAPI double U_EXPORT2 +uprv_log(double d) +{ + return log(d); +} + +U_CAPI void * U_EXPORT2 +uprv_maximumPtr(void * base) +{ +#if U_PLATFORM == U_PF_OS400 + /* + * With the provided function we should never be out of range of a given segment + * (a traditional/typical segment that is). Our segments have 5 bytes for the + * id and 3 bytes for the offset. The key is that the casting takes care of + * only retrieving the offset portion minus x1000. Hence, the smallest offset + * seen in a program is x001000 and when casted to an int would be 0. + * That's why we can only add 0xffefff. Otherwise, we would exceed the segment. + * + * Currently, 16MB is the current addressing limitation on i5/OS if the activation is + * non-TERASPACE. If it is TERASPACE it is 2GB - 4k(header information). + * This function determines the activation based on the pointer that is passed in and + * calculates the appropriate maximum available size for + * each pointer type (TERASPACE and non-TERASPACE) + * + * Unlike other operating systems, the pointer model isn't determined at + * compile time on i5/OS. + */ + if ((base != nullptr) && (_TESTPTR(base, _C_TERASPACE_CHECK))) { + /* if it is a TERASPACE pointer the max is 2GB - 4k */ + return ((void *)(((char *)base)-((uint32_t)(base))+((uint32_t)0x7fffefff))); + } + /* otherwise 16MB since nullptr ptr is not checkable or the ptr is not TERASPACE */ + return ((void *)(((char *)base)-((uint32_t)(base))+((uint32_t)0xffefff))); + +#else + return U_MAX_PTR(base); +#endif +} + +/*--------------------------------------------------------------------------- + Platform-specific Implementations + Try these, and if they don't work on your platform, then special case your + platform with new implementations. + ---------------------------------------------------------------------------*/ + +/* Generic time zone layer -------------------------------------------------- */ + +/* Time zone utilities */ +U_CAPI void U_EXPORT2 +uprv_tzset() +{ +#if defined(U_TZSET) + U_TZSET(); +#else + /* no initialization*/ +#endif +} + +U_CAPI int32_t U_EXPORT2 +uprv_timezone() +{ +#ifdef U_TIMEZONE + return U_TIMEZONE; +#else + time_t t, t1, t2; + struct tm tmrec; + int32_t tdiff = 0; + + time(&t); + uprv_memcpy( &tmrec, localtime(&t), sizeof(tmrec) ); +#if U_PLATFORM != U_PF_IPHONE + UBool dst_checked = (tmrec.tm_isdst != 0); /* daylight savings time is checked*/ +#endif + t1 = mktime(&tmrec); /* local time in seconds*/ + uprv_memcpy( &tmrec, gmtime(&t), sizeof(tmrec) ); + t2 = mktime(&tmrec); /* GMT (or UTC) in seconds*/ + tdiff = t2 - t1; + +#if U_PLATFORM != U_PF_IPHONE + /* imitate NT behaviour, which returns same timezone offset to GMT for + winter and summer. + This does not work on all platforms. For instance, on glibc on Linux + and on Mac OS 10.5, tdiff calculated above remains the same + regardless of whether DST is in effect or not. iOS is another + platform where this does not work. Linux + glibc and Mac OS 10.5 + have U_TIMEZONE defined so that this code is not reached. + */ + if (dst_checked) + tdiff += 3600; +#endif + return tdiff; +#endif +} + +/* Note that U_TZNAME does *not* have to be tzname, but if it is, + some platforms need to have it declared here. */ + +#if defined(U_TZNAME) && (U_PLATFORM == U_PF_IRIX || U_PLATFORM_IS_DARWIN_BASED) +/* RS6000 and others reject char **tzname. */ +extern U_IMPORT char *U_TZNAME[]; +#endif + +#if !UCONFIG_NO_FILE_IO && ((U_PLATFORM_IS_DARWIN_BASED && (U_PLATFORM != U_PF_IPHONE || defined(U_TIMEZONE))) || U_PLATFORM_IS_LINUX_BASED || U_PLATFORM == U_PF_BSD || U_PLATFORM == U_PF_SOLARIS) +/* These platforms are likely to use Olson timezone IDs. */ +/* common targets of the symbolic link at TZDEFAULT are: + * "/usr/share/zoneinfo/<olsonID>" default, older Linux distros, macOS to 10.12 + * "../usr/share/zoneinfo/<olsonID>" newer Linux distros: Red Hat Enterprise Linux 7, Ubuntu 16, SuSe Linux 12 + * "/usr/share/lib/zoneinfo/<olsonID>" Solaris + * "../usr/share/lib/zoneinfo/<olsonID>" Solaris + * "/var/db/timezone/zoneinfo/<olsonID>" macOS 10.13 + * To avoid checking lots of paths, just check that the target path + * before the <olsonID> ends with "/zoneinfo/", and the <olsonID> is valid. + */ + +#define CHECK_LOCALTIME_LINK 1 +#if U_PLATFORM_IS_DARWIN_BASED +#include <tzfile.h> +#define TZZONEINFO (TZDIR "/") +#elif U_PLATFORM == U_PF_SOLARIS +#define TZDEFAULT "/etc/localtime" +#define TZZONEINFO "/usr/share/lib/zoneinfo/" +#define TZ_ENV_CHECK "localtime" +#else +#define TZDEFAULT "/etc/localtime" +#define TZZONEINFO "/usr/share/zoneinfo/" +#endif +#define TZZONEINFOTAIL "/zoneinfo/" +#if U_HAVE_DIRENT_H +#define TZFILE_SKIP "posixrules" /* tz file to skip when searching. */ +/* Some Linux distributions have 'localtime' in /usr/share/zoneinfo + symlinked to /etc/localtime, which makes searchForTZFile return + 'localtime' when it's the first match. */ +#define TZFILE_SKIP2 "localtime" +#define SEARCH_TZFILE +#include <dirent.h> /* Needed to search through system timezone files */ +#endif +static char gTimeZoneBuffer[PATH_MAX]; +static const char *gTimeZoneBufferPtr = nullptr; +#endif + +#if !U_PLATFORM_USES_ONLY_WIN32_API +#define isNonDigit(ch) (ch < '0' || '9' < ch) +#define isDigit(ch) ('0' <= ch && ch <= '9') +static UBool isValidOlsonID(const char *id) { + int32_t idx = 0; + int32_t idxMax = 0; + + /* Determine if this is something like Iceland (Olson ID) + or AST4ADT (non-Olson ID) */ + while (id[idx] && isNonDigit(id[idx]) && id[idx] != ',') { + idx++; + } + + /* Allow at maximum 2 numbers at the end of the id to support zone id's + like GMT+11. */ + idxMax = idx + 2; + while (id[idx] && isDigit(id[idx]) && idx < idxMax) { + idx++; + } + + /* If we went through the whole string, then it might be okay. + The timezone is sometimes set to "CST-7CDT", "CST6CDT5,J129,J131/19:30", + "GRNLNDST3GRNLNDDT" or similar, so we cannot use it. + The rest of the time it could be an Olson ID. George */ + return (UBool)(id[idx] == 0 + || uprv_strcmp(id, "PST8PDT") == 0 + || uprv_strcmp(id, "MST7MDT") == 0 + || uprv_strcmp(id, "CST6CDT") == 0 + || uprv_strcmp(id, "EST5EDT") == 0); +} + +/* On some Unix-like OS, 'posix' subdirectory in + /usr/share/zoneinfo replicates the top-level contents. 'right' + subdirectory has the same set of files, but individual files + are different from those in the top-level directory or 'posix' + because 'right' has files for TAI (Int'l Atomic Time) while 'posix' + has files for UTC. + When the first match for /etc/localtime is in either of them + (usually in posix because 'right' has different file contents), + or TZ environment variable points to one of them, createTimeZone + fails because, say, 'posix/America/New_York' is not an Olson + timezone id ('America/New_York' is). So, we have to skip + 'posix/' and 'right/' at the beginning. */ +static void skipZoneIDPrefix(const char** id) { + if (uprv_strncmp(*id, "posix/", 6) == 0 + || uprv_strncmp(*id, "right/", 6) == 0) + { + *id += 6; + } +} +#endif + +#if defined(U_TZNAME) && !U_PLATFORM_USES_ONLY_WIN32_API + +#define CONVERT_HOURS_TO_SECONDS(offset) (int32_t)(offset*3600) +typedef struct OffsetZoneMapping { + int32_t offsetSeconds; + int32_t daylightType; /* 0=U_DAYLIGHT_NONE, 1=daylight in June-U_DAYLIGHT_JUNE, 2=daylight in December=U_DAYLIGHT_DECEMBER*/ + const char *stdID; + const char *dstID; + const char *olsonID; +} OffsetZoneMapping; + +enum { U_DAYLIGHT_NONE=0,U_DAYLIGHT_JUNE=1,U_DAYLIGHT_DECEMBER=2 }; + +/* +This list tries to disambiguate a set of abbreviated timezone IDs and offsets +and maps it to an Olson ID. +Before adding anything to this list, take a look at +icu/source/tools/tzcode/tz.alias +Sometimes no daylight savings (0) is important to define due to aliases. +This list can be tested with icu/source/test/compat/tzone.pl +More values could be added to daylightType to increase precision. +*/ +static const struct OffsetZoneMapping OFFSET_ZONE_MAPPINGS[] = { + {-45900, 2, "CHAST", "CHADT", "Pacific/Chatham"}, + {-43200, 1, "PETT", "PETST", "Asia/Kamchatka"}, + {-43200, 2, "NZST", "NZDT", "Pacific/Auckland"}, + {-43200, 1, "ANAT", "ANAST", "Asia/Anadyr"}, + {-39600, 1, "MAGT", "MAGST", "Asia/Magadan"}, + {-37800, 2, "LHST", "LHST", "Australia/Lord_Howe"}, + {-36000, 2, "EST", "EST", "Australia/Sydney"}, + {-36000, 1, "SAKT", "SAKST", "Asia/Sakhalin"}, + {-36000, 1, "VLAT", "VLAST", "Asia/Vladivostok"}, + {-34200, 2, "CST", "CST", "Australia/South"}, + {-32400, 1, "YAKT", "YAKST", "Asia/Yakutsk"}, + {-32400, 1, "CHOT", "CHOST", "Asia/Choibalsan"}, + {-31500, 2, "CWST", "CWST", "Australia/Eucla"}, + {-28800, 1, "IRKT", "IRKST", "Asia/Irkutsk"}, + {-28800, 1, "ULAT", "ULAST", "Asia/Ulaanbaatar"}, + {-28800, 2, "WST", "WST", "Australia/West"}, + {-25200, 1, "HOVT", "HOVST", "Asia/Hovd"}, + {-25200, 1, "KRAT", "KRAST", "Asia/Krasnoyarsk"}, + {-21600, 1, "NOVT", "NOVST", "Asia/Novosibirsk"}, + {-21600, 1, "OMST", "OMSST", "Asia/Omsk"}, + {-18000, 1, "YEKT", "YEKST", "Asia/Yekaterinburg"}, + {-14400, 1, "SAMT", "SAMST", "Europe/Samara"}, + {-14400, 1, "AMT", "AMST", "Asia/Yerevan"}, + {-14400, 1, "AZT", "AZST", "Asia/Baku"}, + {-10800, 1, "AST", "ADT", "Asia/Baghdad"}, + {-10800, 1, "MSK", "MSD", "Europe/Moscow"}, + {-10800, 1, "VOLT", "VOLST", "Europe/Volgograd"}, + {-7200, 0, "EET", "CEST", "Africa/Tripoli"}, + {-7200, 1, "EET", "EEST", "Europe/Athens"}, /* Conflicts with Africa/Cairo */ + {-7200, 1, "IST", "IDT", "Asia/Jerusalem"}, + {-3600, 0, "CET", "WEST", "Africa/Algiers"}, + {-3600, 2, "WAT", "WAST", "Africa/Windhoek"}, + {0, 1, "GMT", "IST", "Europe/Dublin"}, + {0, 1, "GMT", "BST", "Europe/London"}, + {0, 0, "WET", "WEST", "Africa/Casablanca"}, + {0, 0, "WET", "WET", "Africa/El_Aaiun"}, + {3600, 1, "AZOT", "AZOST", "Atlantic/Azores"}, + {3600, 1, "EGT", "EGST", "America/Scoresbysund"}, + {10800, 1, "PMST", "PMDT", "America/Miquelon"}, + {10800, 2, "UYT", "UYST", "America/Montevideo"}, + {10800, 1, "WGT", "WGST", "America/Godthab"}, + {10800, 2, "BRT", "BRST", "Brazil/East"}, + {12600, 1, "NST", "NDT", "America/St_Johns"}, + {14400, 1, "AST", "ADT", "Canada/Atlantic"}, + {14400, 2, "AMT", "AMST", "America/Cuiaba"}, + {14400, 2, "CLT", "CLST", "Chile/Continental"}, + {14400, 2, "FKT", "FKST", "Atlantic/Stanley"}, + {14400, 2, "PYT", "PYST", "America/Asuncion"}, + {18000, 1, "CST", "CDT", "America/Havana"}, + {18000, 1, "EST", "EDT", "US/Eastern"}, /* Conflicts with America/Grand_Turk */ + {21600, 2, "EAST", "EASST", "Chile/EasterIsland"}, + {21600, 0, "CST", "MDT", "Canada/Saskatchewan"}, + {21600, 0, "CST", "CDT", "America/Guatemala"}, + {21600, 1, "CST", "CDT", "US/Central"}, /* Conflicts with Mexico/General */ + {25200, 1, "MST", "MDT", "US/Mountain"}, /* Conflicts with Mexico/BajaSur */ + {28800, 0, "PST", "PST", "Pacific/Pitcairn"}, + {28800, 1, "PST", "PDT", "US/Pacific"}, /* Conflicts with Mexico/BajaNorte */ + {32400, 1, "AKST", "AKDT", "US/Alaska"}, + {36000, 1, "HAST", "HADT", "US/Aleutian"} +}; + +/*#define DEBUG_TZNAME*/ + +static const char* remapShortTimeZone(const char *stdID, const char *dstID, int32_t daylightType, int32_t offset) +{ + int32_t idx; +#ifdef DEBUG_TZNAME + fprintf(stderr, "TZ=%s std=%s dst=%s daylight=%d offset=%d\n", getenv("TZ"), stdID, dstID, daylightType, offset); +#endif + for (idx = 0; idx < UPRV_LENGTHOF(OFFSET_ZONE_MAPPINGS); idx++) + { + if (offset == OFFSET_ZONE_MAPPINGS[idx].offsetSeconds + && daylightType == OFFSET_ZONE_MAPPINGS[idx].daylightType + && strcmp(OFFSET_ZONE_MAPPINGS[idx].stdID, stdID) == 0 + && strcmp(OFFSET_ZONE_MAPPINGS[idx].dstID, dstID) == 0) + { + return OFFSET_ZONE_MAPPINGS[idx].olsonID; + } + } + return nullptr; +} +#endif + +#ifdef SEARCH_TZFILE +#define MAX_READ_SIZE 512 + +typedef struct DefaultTZInfo { + char* defaultTZBuffer; + int64_t defaultTZFileSize; + FILE* defaultTZFilePtr; + UBool defaultTZstatus; + int32_t defaultTZPosition; +} DefaultTZInfo; + +/* + * This method compares the two files given to see if they are a match. + * It is currently use to compare two TZ files. + */ +static UBool compareBinaryFiles(const char* defaultTZFileName, const char* TZFileName, DefaultTZInfo* tzInfo) { + FILE* file; + int64_t sizeFile; + int64_t sizeFileLeft; + int32_t sizeFileRead; + int32_t sizeFileToRead; + char bufferFile[MAX_READ_SIZE]; + UBool result = true; + + if (tzInfo->defaultTZFilePtr == nullptr) { + tzInfo->defaultTZFilePtr = fopen(defaultTZFileName, "r"); + } + file = fopen(TZFileName, "r"); + + tzInfo->defaultTZPosition = 0; /* reset position to begin search */ + + if (file != nullptr && tzInfo->defaultTZFilePtr != nullptr) { + /* First check that the file size are equal. */ + if (tzInfo->defaultTZFileSize == 0) { + fseek(tzInfo->defaultTZFilePtr, 0, SEEK_END); + tzInfo->defaultTZFileSize = ftell(tzInfo->defaultTZFilePtr); + } + fseek(file, 0, SEEK_END); + sizeFile = ftell(file); + sizeFileLeft = sizeFile; + + if (sizeFile != tzInfo->defaultTZFileSize) { + result = false; + } else { + /* Store the data from the files in separate buffers and + * compare each byte to determine equality. + */ + if (tzInfo->defaultTZBuffer == nullptr) { + rewind(tzInfo->defaultTZFilePtr); + tzInfo->defaultTZBuffer = (char*)uprv_malloc(sizeof(char) * tzInfo->defaultTZFileSize); + sizeFileRead = fread(tzInfo->defaultTZBuffer, 1, tzInfo->defaultTZFileSize, tzInfo->defaultTZFilePtr); + } + rewind(file); + while(sizeFileLeft > 0) { + uprv_memset(bufferFile, 0, MAX_READ_SIZE); + sizeFileToRead = sizeFileLeft < MAX_READ_SIZE ? sizeFileLeft : MAX_READ_SIZE; + + sizeFileRead = fread(bufferFile, 1, sizeFileToRead, file); + if (memcmp(tzInfo->defaultTZBuffer + tzInfo->defaultTZPosition, bufferFile, sizeFileRead) != 0) { + result = false; + break; + } + sizeFileLeft -= sizeFileRead; + tzInfo->defaultTZPosition += sizeFileRead; + } + } + } else { + result = false; + } + + if (file != nullptr) { + fclose(file); + } + + return result; +} + + +/* dirent also lists two entries: "." and ".." that we can safely ignore. */ +#define SKIP1 "." +#define SKIP2 ".." +static UBool U_CALLCONV putil_cleanup(); +static CharString *gSearchTZFileResult = nullptr; + +/* + * This method recursively traverses the directory given for a matching TZ file and returns the first match. + * This function is not thread safe - it uses a global, gSearchTZFileResult, to hold its results. + */ +static char* searchForTZFile(const char* path, DefaultTZInfo* tzInfo) { + DIR* dirp = nullptr; + struct dirent* dirEntry = nullptr; + char* result = nullptr; + UErrorCode status = U_ZERO_ERROR; + + /* Save the current path */ + CharString curpath(path, -1, status); + if (U_FAILURE(status)) { + goto cleanupAndReturn; + } + + dirp = opendir(path); + if (dirp == nullptr) { + goto cleanupAndReturn; + } + + if (gSearchTZFileResult == nullptr) { + gSearchTZFileResult = new CharString; + if (gSearchTZFileResult == nullptr) { + goto cleanupAndReturn; + } + ucln_common_registerCleanup(UCLN_COMMON_PUTIL, putil_cleanup); + } + + /* Check each entry in the directory. */ + while((dirEntry = readdir(dirp)) != nullptr) { + const char* dirName = dirEntry->d_name; + if (uprv_strcmp(dirName, SKIP1) != 0 && uprv_strcmp(dirName, SKIP2) != 0 + && uprv_strcmp(TZFILE_SKIP, dirName) != 0 && uprv_strcmp(TZFILE_SKIP2, dirName) != 0) { + /* Create a newpath with the new entry to test each entry in the directory. */ + CharString newpath(curpath, status); + newpath.append(dirName, -1, status); + if (U_FAILURE(status)) { + break; + } + + DIR* subDirp = nullptr; + if ((subDirp = opendir(newpath.data())) != nullptr) { + /* If this new path is a directory, make a recursive call with the newpath. */ + closedir(subDirp); + newpath.append('/', status); + if (U_FAILURE(status)) { + break; + } + result = searchForTZFile(newpath.data(), tzInfo); + /* + Have to get out here. Otherwise, we'd keep looking + and return the first match in the top-level directory + if there's a match in the top-level. If not, this function + would return nullptr and set gTimeZoneBufferPtr to nullptr in initDefault(). + It worked without this in most cases because we have a fallback of calling + localtime_r to figure out the default timezone. + */ + if (result != nullptr) + break; + } else { + if(compareBinaryFiles(TZDEFAULT, newpath.data(), tzInfo)) { + int32_t amountToSkip = sizeof(TZZONEINFO) - 1; + if (amountToSkip > newpath.length()) { + amountToSkip = newpath.length(); + } + const char* zoneid = newpath.data() + amountToSkip; + skipZoneIDPrefix(&zoneid); + gSearchTZFileResult->clear(); + gSearchTZFileResult->append(zoneid, -1, status); + if (U_FAILURE(status)) { + break; + } + result = gSearchTZFileResult->data(); + /* Get out after the first one found. */ + break; + } + } + } + } + + cleanupAndReturn: + if (dirp) { + closedir(dirp); + } + return result; +} +#endif + +#if U_PLATFORM == U_PF_ANDROID +typedef int(system_property_read_callback)(const prop_info* info, + void (*callback)(void* cookie, + const char* name, + const char* value, + uint32_t serial), + void* cookie); +typedef int(system_property_get)(const char*, char*); + +static char gAndroidTimeZone[PROP_VALUE_MAX] = { '\0' }; + +static void u_property_read(void* cookie, const char* name, const char* value, + uint32_t serial) { + uprv_strcpy((char* )cookie, value); +} +#endif + +U_CAPI void U_EXPORT2 +uprv_tzname_clear_cache() +{ +#if U_PLATFORM == U_PF_ANDROID + /* Android's timezone is stored in system property. */ + gAndroidTimeZone[0] = '\0'; + void* libc = dlopen("libc.so", RTLD_NOLOAD); + if (libc) { + /* Android API 26+ has new API to get system property and old API + * (__system_property_get) is deprecated */ + system_property_read_callback* property_read_callback = + (system_property_read_callback*)dlsym( + libc, "__system_property_read_callback"); + if (property_read_callback) { + const prop_info* info = + __system_property_find("persist.sys.timezone"); + if (info) { + property_read_callback(info, &u_property_read, gAndroidTimeZone); + } + } else { + system_property_get* property_get = + (system_property_get*)dlsym(libc, "__system_property_get"); + if (property_get) { + property_get("persist.sys.timezone", gAndroidTimeZone); + } + } + dlclose(libc); + } +#endif + +#if defined(CHECK_LOCALTIME_LINK) && !defined(DEBUG_SKIP_LOCALTIME_LINK) + gTimeZoneBufferPtr = nullptr; +#endif +} + +U_CAPI const char* U_EXPORT2 +uprv_tzname(int n) +{ + (void)n; // Avoid unreferenced parameter warning. + const char *tzid = nullptr; +#if U_PLATFORM_USES_ONLY_WIN32_API + tzid = uprv_detectWindowsTimeZone(); + + if (tzid != nullptr) { + return tzid; + } + +#ifndef U_TZNAME + // The return value is free'd in timezone.cpp on Windows because + // the other code path returns a pointer to a heap location. + // If we don't have a name already, then tzname wouldn't be any + // better, so just fall back. + return uprv_strdup(""); +#endif // !U_TZNAME + +#else + +/*#if U_PLATFORM_IS_DARWIN_BASED + int ret; + + tzid = getenv("TZFILE"); + if (tzid != nullptr) { + return tzid; + } +#endif*/ + +/* This code can be temporarily disabled to test tzname resolution later on. */ +#ifndef DEBUG_TZNAME +#if U_PLATFORM == U_PF_ANDROID + tzid = gAndroidTimeZone; +#else + tzid = getenv("TZ"); +#endif + if (tzid != nullptr && isValidOlsonID(tzid) +#if U_PLATFORM == U_PF_SOLARIS + /* Don't misinterpret TZ "localtime" on Solaris as a time zone name. */ + && uprv_strcmp(tzid, TZ_ENV_CHECK) != 0 +#endif + ) { + /* The colon forces tzset() to treat the remainder as zoneinfo path */ + if (tzid[0] == ':') { + tzid++; + } + /* This might be a good Olson ID. */ + skipZoneIDPrefix(&tzid); + return tzid; + } + /* else U_TZNAME will give a better result. */ +#endif + +#if defined(CHECK_LOCALTIME_LINK) && !defined(DEBUG_SKIP_LOCALTIME_LINK) + /* Caller must handle threading issues */ + if (gTimeZoneBufferPtr == nullptr) { + /* + This is a trick to look at the name of the link to get the Olson ID + because the tzfile contents is underspecified. + This isn't guaranteed to work because it may not be a symlink. + */ + char *ret = realpath(TZDEFAULT, gTimeZoneBuffer); + if (ret != nullptr && uprv_strcmp(TZDEFAULT, gTimeZoneBuffer) != 0) { + int32_t tzZoneInfoTailLen = uprv_strlen(TZZONEINFOTAIL); + const char *tzZoneInfoTailPtr = uprv_strstr(gTimeZoneBuffer, TZZONEINFOTAIL); + // MacOS14 has the realpath as something like + // /usr/share/zoneinfo.default/Australia/Melbourne + // which will not have "/zoneinfo/" in the path. + // Therefore if we fail, we fall back to read the link which is + // /var/db/timezone/zoneinfo/Australia/Melbourne + // We also fall back to reading the link if the realpath leads to something like + // /usr/share/zoneinfo/posixrules + if (tzZoneInfoTailPtr == nullptr || + uprv_strcmp(tzZoneInfoTailPtr + tzZoneInfoTailLen, "posixrules") == 0) { + ssize_t size = readlink(TZDEFAULT, gTimeZoneBuffer, sizeof(gTimeZoneBuffer)-1); + if (size > 0) { + gTimeZoneBuffer[size] = 0; + tzZoneInfoTailPtr = uprv_strstr(gTimeZoneBuffer, TZZONEINFOTAIL); + } + } + if (tzZoneInfoTailPtr != nullptr) { + tzZoneInfoTailPtr += tzZoneInfoTailLen; + skipZoneIDPrefix(&tzZoneInfoTailPtr); + if (isValidOlsonID(tzZoneInfoTailPtr)) { + return (gTimeZoneBufferPtr = tzZoneInfoTailPtr); + } + } + } else { +#if defined(SEARCH_TZFILE) + DefaultTZInfo* tzInfo = (DefaultTZInfo*)uprv_malloc(sizeof(DefaultTZInfo)); + if (tzInfo != nullptr) { + tzInfo->defaultTZBuffer = nullptr; + tzInfo->defaultTZFileSize = 0; + tzInfo->defaultTZFilePtr = nullptr; + tzInfo->defaultTZstatus = false; + tzInfo->defaultTZPosition = 0; + + gTimeZoneBufferPtr = searchForTZFile(TZZONEINFO, tzInfo); + + /* Free previously allocated memory */ + if (tzInfo->defaultTZBuffer != nullptr) { + uprv_free(tzInfo->defaultTZBuffer); + } + if (tzInfo->defaultTZFilePtr != nullptr) { + fclose(tzInfo->defaultTZFilePtr); + } + uprv_free(tzInfo); + } + + if (gTimeZoneBufferPtr != nullptr && isValidOlsonID(gTimeZoneBufferPtr)) { + return gTimeZoneBufferPtr; + } +#endif + } + } + else { + return gTimeZoneBufferPtr; + } +#endif +#endif + +#ifdef U_TZNAME +#if U_PLATFORM_USES_ONLY_WIN32_API + /* The return value is free'd in timezone.cpp on Windows because + * the other code path returns a pointer to a heap location. */ + return uprv_strdup(U_TZNAME[n]); +#else + /* + U_TZNAME is usually a non-unique abbreviation, which isn't normally usable. + So we remap the abbreviation to an olson ID. + + Since Windows exposes a little more timezone information, + we normally don't use this code on Windows because + uprv_detectWindowsTimeZone should have already given the correct answer. + */ + { + struct tm juneSol, decemberSol; + int daylightType; + static const time_t juneSolstice=1182478260; /*2007-06-21 18:11 UT*/ + static const time_t decemberSolstice=1198332540; /*2007-12-22 06:09 UT*/ + + /* This probing will tell us when daylight savings occurs. */ + localtime_r(&juneSolstice, &juneSol); + localtime_r(&decemberSolstice, &decemberSol); + if(decemberSol.tm_isdst > 0) { + daylightType = U_DAYLIGHT_DECEMBER; + } else if(juneSol.tm_isdst > 0) { + daylightType = U_DAYLIGHT_JUNE; + } else { + daylightType = U_DAYLIGHT_NONE; + } + tzid = remapShortTimeZone(U_TZNAME[0], U_TZNAME[1], daylightType, uprv_timezone()); + if (tzid != nullptr) { + return tzid; + } + } + return U_TZNAME[n]; +#endif +#else + return ""; +#endif +} + +/* Get and set the ICU data directory --------------------------------------- */ + +static icu::UInitOnce gDataDirInitOnce {}; +static char *gDataDirectory = nullptr; + +UInitOnce gTimeZoneFilesInitOnce {}; +static CharString *gTimeZoneFilesDirectory = nullptr; + +#if U_POSIX_LOCALE || U_PLATFORM_USES_ONLY_WIN32_API + static const char *gCorrectedPOSIXLocale = nullptr; /* Sometimes heap allocated */ + static bool gCorrectedPOSIXLocaleHeapAllocated = false; +#endif + +static UBool U_CALLCONV putil_cleanup() +{ + if (gDataDirectory && *gDataDirectory) { + uprv_free(gDataDirectory); + } + gDataDirectory = nullptr; + gDataDirInitOnce.reset(); + + delete gTimeZoneFilesDirectory; + gTimeZoneFilesDirectory = nullptr; + gTimeZoneFilesInitOnce.reset(); + +#ifdef SEARCH_TZFILE + delete gSearchTZFileResult; + gSearchTZFileResult = nullptr; +#endif + +#if U_POSIX_LOCALE || U_PLATFORM_USES_ONLY_WIN32_API + if (gCorrectedPOSIXLocale && gCorrectedPOSIXLocaleHeapAllocated) { + uprv_free(const_cast<char *>(gCorrectedPOSIXLocale)); + gCorrectedPOSIXLocale = nullptr; + gCorrectedPOSIXLocaleHeapAllocated = false; + } +#endif + return true; +} + +/* + * Set the data directory. + * Make a copy of the passed string, and set the global data dir to point to it. + */ +U_CAPI void U_EXPORT2 +u_setDataDirectory(const char *directory) { + char *newDataDir; + int32_t length; + + if(directory==nullptr || *directory==0) { + /* A small optimization to prevent the malloc and copy when the + shared library is used, and this is a way to make sure that nullptr + is never returned. + */ + newDataDir = (char *)""; + } + else { + length=(int32_t)uprv_strlen(directory); + newDataDir = (char *)uprv_malloc(length + 2); + /* Exit out if newDataDir could not be created. */ + if (newDataDir == nullptr) { + return; + } + uprv_strcpy(newDataDir, directory); + +#if (U_FILE_SEP_CHAR != U_FILE_ALT_SEP_CHAR) + { + char *p; + while((p = uprv_strchr(newDataDir, U_FILE_ALT_SEP_CHAR)) != nullptr) { + *p = U_FILE_SEP_CHAR; + } + } +#endif + } + + if (gDataDirectory && *gDataDirectory) { + uprv_free(gDataDirectory); + } + gDataDirectory = newDataDir; + ucln_common_registerCleanup(UCLN_COMMON_PUTIL, putil_cleanup); +} + +U_CAPI UBool U_EXPORT2 +uprv_pathIsAbsolute(const char *path) +{ + if(!path || !*path) { + return false; + } + + if(*path == U_FILE_SEP_CHAR) { + return true; + } + +#if (U_FILE_SEP_CHAR != U_FILE_ALT_SEP_CHAR) + if(*path == U_FILE_ALT_SEP_CHAR) { + return true; + } +#endif + +#if U_PLATFORM_USES_ONLY_WIN32_API + if( (((path[0] >= 'A') && (path[0] <= 'Z')) || + ((path[0] >= 'a') && (path[0] <= 'z'))) && + path[1] == ':' ) { + return true; + } +#endif + + return false; +} + +/* Backup setting of ICU_DATA_DIR_PREFIX_ENV_VAR + (needed for some Darwin ICU build environments) */ +#if U_PLATFORM_IS_DARWIN_BASED && defined(TARGET_OS_SIMULATOR) && TARGET_OS_SIMULATOR +# if !defined(ICU_DATA_DIR_PREFIX_ENV_VAR) +# define ICU_DATA_DIR_PREFIX_ENV_VAR "IPHONE_SIMULATOR_ROOT" +# endif +#endif + +#if defined(ICU_DATA_DIR_WINDOWS) +// Helper function to get the ICU Data Directory under the Windows directory location. +static BOOL U_CALLCONV getIcuDataDirectoryUnderWindowsDirectory(char* directoryBuffer, UINT bufferLength) +{ + wchar_t windowsPath[MAX_PATH]; + char windowsPathUtf8[MAX_PATH]; + + UINT length = GetSystemWindowsDirectoryW(windowsPath, UPRV_LENGTHOF(windowsPath)); + if ((length > 0) && (length < (UPRV_LENGTHOF(windowsPath) - 1))) { + // Convert UTF-16 to a UTF-8 string. + UErrorCode status = U_ZERO_ERROR; + int32_t windowsPathUtf8Len = 0; + u_strToUTF8(windowsPathUtf8, static_cast<int32_t>(UPRV_LENGTHOF(windowsPathUtf8)), + &windowsPathUtf8Len, reinterpret_cast<const char16_t*>(windowsPath), -1, &status); + + if (U_SUCCESS(status) && (status != U_STRING_NOT_TERMINATED_WARNING) && + (windowsPathUtf8Len < (UPRV_LENGTHOF(windowsPathUtf8) - 1))) { + // Ensure it always has a separator, so we can append the ICU data path. + if (windowsPathUtf8[windowsPathUtf8Len - 1] != U_FILE_SEP_CHAR) { + windowsPathUtf8[windowsPathUtf8Len++] = U_FILE_SEP_CHAR; + windowsPathUtf8[windowsPathUtf8Len] = '\0'; + } + // Check if the concatenated string will fit. + if ((windowsPathUtf8Len + UPRV_LENGTHOF(ICU_DATA_DIR_WINDOWS)) < bufferLength) { + uprv_strcpy(directoryBuffer, windowsPathUtf8); + uprv_strcat(directoryBuffer, ICU_DATA_DIR_WINDOWS); + return true; + } + } + } + + return false; +} +#endif + +static void U_CALLCONV dataDirectoryInitFn() { + /* If we already have the directory, then return immediately. Will happen if user called + * u_setDataDirectory(). + */ + if (gDataDirectory) { + return; + } + + const char *path = nullptr; +#if defined(ICU_DATA_DIR_PREFIX_ENV_VAR) + char datadir_path_buffer[PATH_MAX]; +#endif + + /* + When ICU_NO_USER_DATA_OVERRIDE is defined, users aren't allowed to + override ICU's data with the ICU_DATA environment variable. This prevents + problems where multiple custom copies of ICU's specific version of data + are installed on a system. Either the application must define the data + directory with u_setDataDirectory, define ICU_DATA_DIR when compiling + ICU, set the data with udata_setCommonData or trust that all of the + required data is contained in ICU's data library that contains + the entry point defined by U_ICUDATA_ENTRY_POINT. + + There may also be some platforms where environment variables + are not allowed. + */ +# if !defined(ICU_NO_USER_DATA_OVERRIDE) && !UCONFIG_NO_FILE_IO + /* First try to get the environment variable */ +# if U_PLATFORM_HAS_WINUWP_API == 0 // Windows UWP does not support getenv + path=getenv("ICU_DATA"); +# endif +# endif + + /* ICU_DATA_DIR may be set as a compile option. + * U_ICU_DATA_DEFAULT_DIR is provided and is set by ICU at compile time + * and is used only when data is built in archive mode eliminating the need + * for ICU_DATA_DIR to be set. U_ICU_DATA_DEFAULT_DIR is set to the installation + * directory of the data dat file. Users should use ICU_DATA_DIR if they want to + * set their own path. + */ +#if defined(ICU_DATA_DIR) || defined(U_ICU_DATA_DEFAULT_DIR) + if(path==nullptr || *path==0) { +# if defined(ICU_DATA_DIR_PREFIX_ENV_VAR) + const char *prefix = getenv(ICU_DATA_DIR_PREFIX_ENV_VAR); +# endif +# ifdef ICU_DATA_DIR + path=ICU_DATA_DIR; +# else + path=U_ICU_DATA_DEFAULT_DIR; +# endif +# if defined(ICU_DATA_DIR_PREFIX_ENV_VAR) + if (prefix != nullptr) { + snprintf(datadir_path_buffer, sizeof(datadir_path_buffer), "%s%s", prefix, path); + path=datadir_path_buffer; + } +# endif + } +#endif + +#if defined(ICU_DATA_DIR_WINDOWS) + char datadir_path_buffer[MAX_PATH]; + if (getIcuDataDirectoryUnderWindowsDirectory(datadir_path_buffer, UPRV_LENGTHOF(datadir_path_buffer))) { + path = datadir_path_buffer; + } +#endif + + if(path==nullptr) { + /* It looks really bad, set it to something. */ + path = ""; + } + + u_setDataDirectory(path); + return; +} + +U_CAPI const char * U_EXPORT2 +u_getDataDirectory() { + umtx_initOnce(gDataDirInitOnce, &dataDirectoryInitFn); + return gDataDirectory; +} + +static void setTimeZoneFilesDir(const char *path, UErrorCode &status) { + if (U_FAILURE(status)) { + return; + } + gTimeZoneFilesDirectory->clear(); + gTimeZoneFilesDirectory->append(path, status); +#if (U_FILE_SEP_CHAR != U_FILE_ALT_SEP_CHAR) + char *p = gTimeZoneFilesDirectory->data(); + while ((p = uprv_strchr(p, U_FILE_ALT_SEP_CHAR)) != nullptr) { + *p = U_FILE_SEP_CHAR; + } +#endif +} + +#define TO_STRING(x) TO_STRING_2(x) +#define TO_STRING_2(x) #x + +static void U_CALLCONV TimeZoneDataDirInitFn(UErrorCode &status) { + U_ASSERT(gTimeZoneFilesDirectory == nullptr); + ucln_common_registerCleanup(UCLN_COMMON_PUTIL, putil_cleanup); + gTimeZoneFilesDirectory = new CharString(); + if (gTimeZoneFilesDirectory == nullptr) { + status = U_MEMORY_ALLOCATION_ERROR; + return; + } + + const char *dir = ""; + +#if defined(ICU_TIMEZONE_FILES_DIR_PREFIX_ENV_VAR) + char timezonefilesdir_path_buffer[PATH_MAX]; + const char *prefix = getenv(ICU_TIMEZONE_FILES_DIR_PREFIX_ENV_VAR); +#endif + +#if U_PLATFORM_HAS_WINUWP_API == 1 +// The UWP version does not support the environment variable setting. + +# if defined(ICU_DATA_DIR_WINDOWS) + // When using the Windows system data, we can possibly pick up time zone data from the Windows directory. + char datadir_path_buffer[MAX_PATH]; + if (getIcuDataDirectoryUnderWindowsDirectory(datadir_path_buffer, UPRV_LENGTHOF(datadir_path_buffer))) { + dir = datadir_path_buffer; + } +# endif + +#else + dir = getenv("ICU_TIMEZONE_FILES_DIR"); +#endif // U_PLATFORM_HAS_WINUWP_API + +#if defined(U_TIMEZONE_FILES_DIR) + if (dir == nullptr) { + // Build time configuration setting. + dir = TO_STRING(U_TIMEZONE_FILES_DIR); + } +#endif + + if (dir == nullptr) { + dir = ""; + } + +#if defined(ICU_TIMEZONE_FILES_DIR_PREFIX_ENV_VAR) + if (prefix != nullptr) { + snprintf(timezonefilesdir_path_buffer, sizeof(timezonefilesdir_path_buffer), "%s%s", prefix, dir); + dir = timezonefilesdir_path_buffer; + } +#endif + + setTimeZoneFilesDir(dir, status); +} + + +U_CAPI const char * U_EXPORT2 +u_getTimeZoneFilesDirectory(UErrorCode *status) { + umtx_initOnce(gTimeZoneFilesInitOnce, &TimeZoneDataDirInitFn, *status); + return U_SUCCESS(*status) ? gTimeZoneFilesDirectory->data() : ""; +} + +U_CAPI void U_EXPORT2 +u_setTimeZoneFilesDirectory(const char *path, UErrorCode *status) { + umtx_initOnce(gTimeZoneFilesInitOnce, &TimeZoneDataDirInitFn, *status); + setTimeZoneFilesDir(path, *status); + + // Note: this function does some extra churn, first setting based on the + // environment, then immediately replacing with the value passed in. + // The logic is simpler that way, and performance shouldn't be an issue. +} + + +#if U_POSIX_LOCALE +/* A helper function used by uprv_getPOSIXIDForDefaultLocale and + * uprv_getPOSIXIDForDefaultCodepage. Returns the posix locale id for + * LC_CTYPE and LC_MESSAGES. It doesn't support other locale categories. + */ +static const char *uprv_getPOSIXIDForCategory(int category) +{ + const char* posixID = nullptr; + if (category == LC_MESSAGES || category == LC_CTYPE) { + /* + * On Solaris two different calls to setlocale can result in + * different values. Only get this value once. + * + * We must check this first because an application can set this. + * + * LC_ALL can't be used because it's platform dependent. The LANG + * environment variable seems to affect LC_CTYPE variable by default. + * Here is what setlocale(LC_ALL, nullptr) can return. + * HPUX can return 'C C C C C C C' + * Solaris can return /en_US/C/C/C/C/C on the second try. + * Linux can return LC_CTYPE=C;LC_NUMERIC=C;... + * + * The default codepage detection also needs to use LC_CTYPE. + * + * Do not call setlocale(LC_*, "")! Using an empty string instead + * of nullptr, will modify the libc behavior. + */ + posixID = setlocale(category, nullptr); + if ((posixID == 0) + || (uprv_strcmp("C", posixID) == 0) + || (uprv_strcmp("POSIX", posixID) == 0)) + { + /* Maybe we got some garbage. Try something more reasonable */ + posixID = getenv("LC_ALL"); + /* Solaris speaks POSIX - See IEEE Std 1003.1-2008 + * This is needed to properly handle empty env. variables + */ +#if U_PLATFORM == U_PF_SOLARIS + if ((posixID == 0) || (posixID[0] == '\0')) { + posixID = getenv(category == LC_MESSAGES ? "LC_MESSAGES" : "LC_CTYPE"); + if ((posixID == 0) || (posixID[0] == '\0')) { +#else + if (posixID == 0) { + posixID = getenv(category == LC_MESSAGES ? "LC_MESSAGES" : "LC_CTYPE"); + if (posixID == 0) { +#endif + posixID = getenv("LANG"); + } + } + } + } + if ((posixID==0) + || (uprv_strcmp("C", posixID) == 0) + || (uprv_strcmp("POSIX", posixID) == 0)) + { + /* Nothing worked. Give it a nice POSIX default value. */ + posixID = "en_US_POSIX"; + // Note: this test will not catch 'C.UTF-8', + // that will be handled in uprv_getDefaultLocaleID(). + // Leave this mapping here for the uprv_getPOSIXIDForDefaultCodepage() + // caller which expects to see "en_US_POSIX" in many branches. + } + return posixID; +} + +/* Return just the POSIX id for the default locale, whatever happens to be in + * it. It gets the value from LC_MESSAGES and indirectly from LC_ALL and LANG. + */ +static const char *uprv_getPOSIXIDForDefaultLocale() +{ + static const char* posixID = nullptr; + if (posixID == 0) { + posixID = uprv_getPOSIXIDForCategory(LC_MESSAGES); + } + return posixID; +} + +#if !U_CHARSET_IS_UTF8 +/* Return just the POSIX id for the default codepage, whatever happens to be in + * it. It gets the value from LC_CTYPE and indirectly from LC_ALL and LANG. + */ +static const char *uprv_getPOSIXIDForDefaultCodepage() +{ + static const char* posixID = nullptr; + if (posixID == 0) { + posixID = uprv_getPOSIXIDForCategory(LC_CTYPE); + } + return posixID; +} +#endif +#endif + +/* NOTE: The caller should handle thread safety */ +U_CAPI const char* U_EXPORT2 +uprv_getDefaultLocaleID() +{ +#if U_POSIX_LOCALE +/* + Note that: (a '!' means the ID is improper somehow) + LC_ALL ----> default_loc codepage +-------------------------------------------------------- + ab.CD ab CD + ab@CD ab__CD - + ab@CD.EF ab__CD EF + + ab_CD.EF@GH ab_CD_GH EF + +Some 'improper' ways to do the same as above: + ! ab_CD@GH.EF ab_CD_GH EF + ! ab_CD.EF@GH.IJ ab_CD_GH EF + ! ab_CD@ZZ.EF@GH.IJ ab_CD_GH EF + + _CD@GH _CD_GH - + _CD.EF@GH _CD_GH EF + +The variant cannot have dots in it. +The 'rightmost' variant (@xxx) wins. +The leftmost codepage (.xxx) wins. +*/ + const char* posixID = uprv_getPOSIXIDForDefaultLocale(); + + /* Format: (no spaces) + ll [ _CC ] [ . MM ] [ @ VV] + + l = lang, C = ctry, M = charmap, V = variant + */ + + if (gCorrectedPOSIXLocale != nullptr) { + return gCorrectedPOSIXLocale; + } + + // Copy the ID into owned memory. + // Over-allocate in case we replace "C" with "en_US_POSIX" (+10), + null termination + char *correctedPOSIXLocale = static_cast<char *>(uprv_malloc(uprv_strlen(posixID) + 10 + 1)); + if (correctedPOSIXLocale == nullptr) { + return nullptr; + } + uprv_strcpy(correctedPOSIXLocale, posixID); + + char *limit; + if ((limit = uprv_strchr(correctedPOSIXLocale, '.')) != nullptr) { + *limit = 0; + } + if ((limit = uprv_strchr(correctedPOSIXLocale, '@')) != nullptr) { + *limit = 0; + } + + if ((uprv_strcmp("C", correctedPOSIXLocale) == 0) // no @ variant + || (uprv_strcmp("POSIX", correctedPOSIXLocale) == 0)) { + // Raw input was C.* or POSIX.*, Give it a nice POSIX default value. + // (The "C"/"POSIX" case is handled in uprv_getPOSIXIDForCategory()) + uprv_strcpy(correctedPOSIXLocale, "en_US_POSIX"); + } + + /* Note that we scan the *uncorrected* ID. */ + const char *p; + if ((p = uprv_strrchr(posixID, '@')) != nullptr) { + p++; + + /* Take care of any special cases here.. */ + if (!uprv_strcmp(p, "nynorsk")) { + p = "NY"; + /* Don't worry about no__NY. In practice, it won't appear. */ + } + + if (uprv_strchr(correctedPOSIXLocale,'_') == nullptr) { + uprv_strcat(correctedPOSIXLocale, "__"); /* aa@b -> aa__b (note this can make the new locale 1 char longer) */ + } + else { + uprv_strcat(correctedPOSIXLocale, "_"); /* aa_CC@b -> aa_CC_b */ + } + + const char *q; + if ((q = uprv_strchr(p, '.')) != nullptr) { + /* How big will the resulting string be? */ + int32_t len = (int32_t)(uprv_strlen(correctedPOSIXLocale) + (q-p)); + uprv_strncat(correctedPOSIXLocale, p, q-p); // do not include charset + correctedPOSIXLocale[len] = 0; + } + else { + /* Anything following the @ sign */ + uprv_strcat(correctedPOSIXLocale, p); + } + + /* Should there be a map from 'no@nynorsk' -> no_NO_NY here? + * How about 'russian' -> 'ru'? + * Many of the other locales using ISO codes will be handled by the + * canonicalization functions in uloc_getDefault. + */ + } + + if (gCorrectedPOSIXLocale == nullptr) { + gCorrectedPOSIXLocale = correctedPOSIXLocale; + gCorrectedPOSIXLocaleHeapAllocated = true; + ucln_common_registerCleanup(UCLN_COMMON_PUTIL, putil_cleanup); + correctedPOSIXLocale = nullptr; + } + posixID = gCorrectedPOSIXLocale; + + if (correctedPOSIXLocale != nullptr) { /* Was already set - clean up. */ + uprv_free(correctedPOSIXLocale); + } + + return posixID; + +#elif U_PLATFORM_USES_ONLY_WIN32_API +#define POSIX_LOCALE_CAPACITY 64 + UErrorCode status = U_ZERO_ERROR; + char *correctedPOSIXLocale = nullptr; + + // If we have already figured this out just use the cached value + if (gCorrectedPOSIXLocale != nullptr) { + return gCorrectedPOSIXLocale; + } + + // No cached value, need to determine the current value + static WCHAR windowsLocale[LOCALE_NAME_MAX_LENGTH] = {}; + int length = GetLocaleInfoEx(LOCALE_NAME_USER_DEFAULT, LOCALE_SNAME, windowsLocale, LOCALE_NAME_MAX_LENGTH); + + // Now we should have a Windows locale name that needs converted to the POSIX style. + if (length > 0) // If length is 0, then the GetLocaleInfoEx failed. + { + // First we need to go from UTF-16 to char (and also convert from _ to - while we're at it.) + char modifiedWindowsLocale[LOCALE_NAME_MAX_LENGTH] = {}; + + int32_t i; + for (i = 0; i < UPRV_LENGTHOF(modifiedWindowsLocale); i++) + { + if (windowsLocale[i] == '_') + { + modifiedWindowsLocale[i] = '-'; + } + else + { + modifiedWindowsLocale[i] = static_cast<char>(windowsLocale[i]); + } + + if (modifiedWindowsLocale[i] == '\0') + { + break; + } + } + + if (i >= UPRV_LENGTHOF(modifiedWindowsLocale)) + { + // Ran out of room, can't really happen, maybe we'll be lucky about a matching + // locale when tags are dropped + modifiedWindowsLocale[UPRV_LENGTHOF(modifiedWindowsLocale) - 1] = '\0'; + } + + // Now normalize the resulting name + correctedPOSIXLocale = static_cast<char *>(uprv_malloc(POSIX_LOCALE_CAPACITY + 1)); + /* TODO: Should we just exit on memory allocation failure? */ + if (correctedPOSIXLocale) + { + int32_t posixLen = uloc_canonicalize(modifiedWindowsLocale, correctedPOSIXLocale, POSIX_LOCALE_CAPACITY, &status); + if (U_SUCCESS(status)) + { + *(correctedPOSIXLocale + posixLen) = 0; + gCorrectedPOSIXLocale = correctedPOSIXLocale; + gCorrectedPOSIXLocaleHeapAllocated = true; + ucln_common_registerCleanup(UCLN_COMMON_PUTIL, putil_cleanup); + } + else + { + uprv_free(correctedPOSIXLocale); + } + } + } + + // If unable to find a locale we can agree upon, use en-US by default + if (gCorrectedPOSIXLocale == nullptr) { + gCorrectedPOSIXLocale = "en_US"; + } + return gCorrectedPOSIXLocale; + +#elif U_PLATFORM == U_PF_OS400 + /* locales are process scoped and are by definition thread safe */ + static char correctedLocale[64]; + const char *localeID = getenv("LC_ALL"); + char *p; + + if (localeID == nullptr) + localeID = getenv("LANG"); + if (localeID == nullptr) + localeID = setlocale(LC_ALL, nullptr); + /* Make sure we have something... */ + if (localeID == nullptr) + return "en_US_POSIX"; + + /* Extract the locale name from the path. */ + if((p = uprv_strrchr(localeID, '/')) != nullptr) + { + /* Increment p to start of locale name. */ + p++; + localeID = p; + } + + /* Copy to work location. */ + uprv_strcpy(correctedLocale, localeID); + + /* Strip off the '.locale' extension. */ + if((p = uprv_strchr(correctedLocale, '.')) != nullptr) { + *p = 0; + } + + /* Upper case the locale name. */ + T_CString_toUpperCase(correctedLocale); + + /* See if we are using the POSIX locale. Any of the + * following are equivalent and use the same QLGPGCMA + * (POSIX) locale. + * QLGPGCMA2 means UCS2 + * QLGPGCMA_4 means UTF-32 + * QLGPGCMA_8 means UTF-8 + */ + if ((uprv_strcmp("C", correctedLocale) == 0) || + (uprv_strcmp("POSIX", correctedLocale) == 0) || + (uprv_strncmp("QLGPGCMA", correctedLocale, 8) == 0)) + { + uprv_strcpy(correctedLocale, "en_US_POSIX"); + } + else + { + int16_t LocaleLen; + + /* Lower case the lang portion. */ + for(p = correctedLocale; *p != 0 && *p != '_'; p++) + { + *p = uprv_tolower(*p); + } + + /* Adjust for Euro. After '_E' add 'URO'. */ + LocaleLen = uprv_strlen(correctedLocale); + if (correctedLocale[LocaleLen - 2] == '_' && + correctedLocale[LocaleLen - 1] == 'E') + { + uprv_strcat(correctedLocale, "URO"); + } + + /* If using Lotus-based locale then convert to + * equivalent non Lotus. + */ + else if (correctedLocale[LocaleLen - 2] == '_' && + correctedLocale[LocaleLen - 1] == 'L') + { + correctedLocale[LocaleLen - 2] = 0; + } + + /* There are separate simplified and traditional + * locales called zh_HK_S and zh_HK_T. + */ + else if (uprv_strncmp(correctedLocale, "zh_HK", 5) == 0) + { + uprv_strcpy(correctedLocale, "zh_HK"); + } + + /* A special zh_CN_GBK locale... + */ + else if (uprv_strcmp(correctedLocale, "zh_CN_GBK") == 0) + { + uprv_strcpy(correctedLocale, "zh_CN"); + } + + } + + return correctedLocale; +#endif + +} + +#if !U_CHARSET_IS_UTF8 +#if U_POSIX_LOCALE +/* +Due to various platform differences, one platform may specify a charset, +when they really mean a different charset. Remap the names so that they are +compatible with ICU. Only conflicting/ambiguous aliases should be resolved +here. Before adding anything to this function, please consider adding unique +names to the ICU alias table in the data directory. +*/ +static const char* +remapPlatformDependentCodepage(const char *locale, const char *name) { + if (locale != nullptr && *locale == 0) { + /* Make sure that an empty locale is handled the same way. */ + locale = nullptr; + } + if (name == nullptr) { + return nullptr; + } +#if U_PLATFORM == U_PF_AIX + if (uprv_strcmp(name, "IBM-943") == 0) { + /* Use the ASCII compatible ibm-943 */ + name = "Shift-JIS"; + } + else if (uprv_strcmp(name, "IBM-1252") == 0) { + /* Use the windows-1252 that contains the Euro */ + name = "IBM-5348"; + } +#elif U_PLATFORM == U_PF_SOLARIS + if (locale != nullptr && uprv_strcmp(name, "EUC") == 0) { + /* Solaris underspecifies the "EUC" name. */ + if (uprv_strcmp(locale, "zh_CN") == 0) { + name = "EUC-CN"; + } + else if (uprv_strcmp(locale, "zh_TW") == 0) { + name = "EUC-TW"; + } + else if (uprv_strcmp(locale, "ko_KR") == 0) { + name = "EUC-KR"; + } + } + else if (uprv_strcmp(name, "eucJP") == 0) { + /* + ibm-954 is the best match. + ibm-33722 is the default for eucJP (similar to Windows). + */ + name = "eucjis"; + } + else if (uprv_strcmp(name, "646") == 0) { + /* + * The default codepage given by Solaris is 646 but the C library routines treat it as if it was + * ISO-8859-1 instead of US-ASCII(646). + */ + name = "ISO-8859-1"; + } +#elif U_PLATFORM_IS_DARWIN_BASED + if (locale == nullptr && *name == 0) { + /* + No locale was specified, and an empty name was passed in. + This usually indicates that nl_langinfo didn't return valid information. + Mac OS X uses UTF-8 by default (especially the locale data and console). + */ + name = "UTF-8"; + } + else if (uprv_strcmp(name, "CP949") == 0) { + /* Remap CP949 to a similar codepage to avoid issues with backslash and won symbol. */ + name = "EUC-KR"; + } + else if (locale != nullptr && uprv_strcmp(locale, "en_US_POSIX") != 0 && uprv_strcmp(name, "US-ASCII") == 0) { + /* + * For non C/POSIX locale, default the code page to UTF-8 instead of US-ASCII. + */ + name = "UTF-8"; + } +#elif U_PLATFORM == U_PF_BSD + if (uprv_strcmp(name, "CP949") == 0) { + /* Remap CP949 to a similar codepage to avoid issues with backslash and won symbol. */ + name = "EUC-KR"; + } +#elif U_PLATFORM == U_PF_HPUX + if (locale != nullptr && uprv_strcmp(locale, "zh_HK") == 0 && uprv_strcmp(name, "big5") == 0) { + /* HP decided to extend big5 as hkbig5 even though it's not compatible :-( */ + /* zh_TW.big5 is not the same charset as zh_HK.big5! */ + name = "hkbig5"; + } + else if (uprv_strcmp(name, "eucJP") == 0) { + /* + ibm-1350 is the best match, but unavailable. + ibm-954 is mostly a superset of ibm-1350. + ibm-33722 is the default for eucJP (similar to Windows). + */ + name = "eucjis"; + } +#elif U_PLATFORM == U_PF_LINUX + if (locale != nullptr && uprv_strcmp(name, "euc") == 0) { + /* Linux underspecifies the "EUC" name. */ + if (uprv_strcmp(locale, "korean") == 0) { + name = "EUC-KR"; + } + else if (uprv_strcmp(locale, "japanese") == 0) { + /* See comment below about eucJP */ + name = "eucjis"; + } + } + else if (uprv_strcmp(name, "eucjp") == 0) { + /* + ibm-1350 is the best match, but unavailable. + ibm-954 is mostly a superset of ibm-1350. + ibm-33722 is the default for eucJP (similar to Windows). + */ + name = "eucjis"; + } + else if (locale != nullptr && uprv_strcmp(locale, "en_US_POSIX") != 0 && + (uprv_strcmp(name, "ANSI_X3.4-1968") == 0 || uprv_strcmp(name, "US-ASCII") == 0)) { + /* + * For non C/POSIX locale, default the code page to UTF-8 instead of US-ASCII. + */ + name = "UTF-8"; + } + /* + * Linux returns ANSI_X3.4-1968 for C/POSIX, but the call site takes care of + * it by falling back to 'US-ASCII' when nullptr is returned from this + * function. So, we don't have to worry about it here. + */ +#endif + /* return nullptr when "" is passed in */ + if (*name == 0) { + name = nullptr; + } + return name; +} + +static const char* +getCodepageFromPOSIXID(const char *localeName, char * buffer, int32_t buffCapacity) +{ + char localeBuf[100]; + const char *name = nullptr; + char *variant = nullptr; + + if (localeName != nullptr && (name = (uprv_strchr(localeName, '.'))) != nullptr) { + size_t localeCapacity = uprv_min(sizeof(localeBuf), (name-localeName)+1); + uprv_strncpy(localeBuf, localeName, localeCapacity); + localeBuf[localeCapacity-1] = 0; /* ensure NUL termination */ + name = uprv_strncpy(buffer, name+1, buffCapacity); + buffer[buffCapacity-1] = 0; /* ensure NUL termination */ + if ((variant = const_cast<char *>(uprv_strchr(name, '@'))) != nullptr) { + *variant = 0; + } + name = remapPlatformDependentCodepage(localeBuf, name); + } + return name; +} +#endif + +static const char* +int_getDefaultCodepage() +{ +#if U_PLATFORM == U_PF_OS400 + uint32_t ccsid = 37; /* Default to ibm-37 */ + static char codepage[64]; + Qwc_JOBI0400_t jobinfo; + Qus_EC_t error = { sizeof(Qus_EC_t) }; /* SPI error code */ + + EPT_CALL(QUSRJOBI)(&jobinfo, sizeof(jobinfo), "JOBI0400", + "* ", " ", &error); + + if (error.Bytes_Available == 0) { + if (jobinfo.Coded_Char_Set_ID != 0xFFFF) { + ccsid = (uint32_t)jobinfo.Coded_Char_Set_ID; + } + else if (jobinfo.Default_Coded_Char_Set_Id != 0xFFFF) { + ccsid = (uint32_t)jobinfo.Default_Coded_Char_Set_Id; + } + /* else use the default */ + } + snprintf(codepage, sizeof(codepage), "ibm-%d", ccsid); + return codepage; + +#elif U_PLATFORM == U_PF_OS390 + static char codepage[64]; + + strncpy(codepage, nl_langinfo(CODESET),63-strlen(UCNV_SWAP_LFNL_OPTION_STRING)); + strcat(codepage,UCNV_SWAP_LFNL_OPTION_STRING); + codepage[63] = 0; /* NUL terminate */ + + return codepage; + +#elif U_PLATFORM_USES_ONLY_WIN32_API + static char codepage[64]; + DWORD codepageNumber = 0; + +#if U_PLATFORM_HAS_WINUWP_API == 1 + // UWP doesn't have a direct API to get the default ACP as Microsoft would rather + // have folks use Unicode than a "system" code page, however this is the same + // codepage as the system default locale codepage. (FWIW, the system locale is + // ONLY used for codepage, it should never be used for anything else) + GetLocaleInfoEx(LOCALE_NAME_SYSTEM_DEFAULT, LOCALE_IDEFAULTANSICODEPAGE | LOCALE_RETURN_NUMBER, + (LPWSTR)&codepageNumber, sizeof(codepageNumber) / sizeof(WCHAR)); +#else + // Win32 apps can call GetACP + codepageNumber = GetACP(); +#endif + // Special case for UTF-8 + if (codepageNumber == 65001) + { + return "UTF-8"; + } + // Windows codepages can look like windows-1252, so format the found number + // the numbers are eclectic, however all valid system code pages, besides UTF-8 + // are between 3 and 19999 + if (codepageNumber > 0 && codepageNumber < 20000) + { + snprintf(codepage, sizeof(codepage), "windows-%ld", codepageNumber); + return codepage; + } + // If the codepage number call failed then return UTF-8 + return "UTF-8"; + +#elif U_POSIX_LOCALE + static char codesetName[100]; + const char *localeName = nullptr; + const char *name = nullptr; + + localeName = uprv_getPOSIXIDForDefaultCodepage(); + uprv_memset(codesetName, 0, sizeof(codesetName)); + /* On Solaris nl_langinfo returns C locale values unless setlocale + * was called earlier. + */ +#if (U_HAVE_NL_LANGINFO_CODESET && U_PLATFORM != U_PF_SOLARIS) + /* When available, check nl_langinfo first because it usually gives more + useful names. It depends on LC_CTYPE. + nl_langinfo may use the same buffer as setlocale. */ + { + const char *codeset = nl_langinfo(U_NL_LANGINFO_CODESET); +#if U_PLATFORM_IS_DARWIN_BASED || U_PLATFORM_IS_LINUX_BASED + /* + * On Linux and MacOSX, ensure that default codepage for non C/POSIX locale is UTF-8 + * instead of ASCII. + */ + if (uprv_strcmp(localeName, "en_US_POSIX") != 0) { + codeset = remapPlatformDependentCodepage(localeName, codeset); + } else +#endif + { + codeset = remapPlatformDependentCodepage(nullptr, codeset); + } + + if (codeset != nullptr) { + uprv_strncpy(codesetName, codeset, sizeof(codesetName)); + codesetName[sizeof(codesetName)-1] = 0; + return codesetName; + } + } +#endif + + /* Use setlocale in a nice way, and then check some environment variables. + Maybe the application used setlocale already. + */ + uprv_memset(codesetName, 0, sizeof(codesetName)); + name = getCodepageFromPOSIXID(localeName, codesetName, sizeof(codesetName)); + if (name) { + /* if we can find the codeset name from setlocale, return that. */ + return name; + } + + if (*codesetName == 0) + { + /* Everything failed. Return US ASCII (ISO 646). */ + (void)uprv_strcpy(codesetName, "US-ASCII"); + } + return codesetName; +#else + return "US-ASCII"; +#endif +} + + +U_CAPI const char* U_EXPORT2 +uprv_getDefaultCodepage() +{ + static char const *name = nullptr; + umtx_lock(nullptr); + if (name == nullptr) { + name = int_getDefaultCodepage(); + } + umtx_unlock(nullptr); + return name; +} +#endif /* !U_CHARSET_IS_UTF8 */ + + +/* end of platform-specific implementation -------------- */ + +/* version handling --------------------------------------------------------- */ + +U_CAPI void U_EXPORT2 +u_versionFromString(UVersionInfo versionArray, const char *versionString) { + char *end; + uint16_t part=0; + + if(versionArray==nullptr) { + return; + } + + if(versionString!=nullptr) { + for(;;) { + versionArray[part]=(uint8_t)uprv_strtoul(versionString, &end, 10); + if(end==versionString || ++part==U_MAX_VERSION_LENGTH || *end!=U_VERSION_DELIMITER) { + break; + } + versionString=end+1; + } + } + + while(part<U_MAX_VERSION_LENGTH) { + versionArray[part++]=0; + } +} + +U_CAPI void U_EXPORT2 +u_versionFromUString(UVersionInfo versionArray, const char16_t *versionString) { + if(versionArray!=nullptr && versionString!=nullptr) { + char versionChars[U_MAX_VERSION_STRING_LENGTH+1]; + int32_t len = u_strlen(versionString); + if(len>U_MAX_VERSION_STRING_LENGTH) { + len = U_MAX_VERSION_STRING_LENGTH; + } + u_UCharsToChars(versionString, versionChars, len); + versionChars[len]=0; + u_versionFromString(versionArray, versionChars); + } +} + +U_CAPI void U_EXPORT2 +u_versionToString(const UVersionInfo versionArray, char *versionString) { + uint16_t count, part; + uint8_t field; + + if(versionString==nullptr) { + return; + } + + if(versionArray==nullptr) { + versionString[0]=0; + return; + } + + /* count how many fields need to be written */ + for(count=4; count>0 && versionArray[count-1]==0; --count) { + } + + if(count <= 1) { + count = 2; + } + + /* write the first part */ + /* write the decimal field value */ + field=versionArray[0]; + if(field>=100) { + *versionString++=(char)('0'+field/100); + field%=100; + } + if(field>=10) { + *versionString++=(char)('0'+field/10); + field%=10; + } + *versionString++=(char)('0'+field); + + /* write the following parts */ + for(part=1; part<count; ++part) { + /* write a dot first */ + *versionString++=U_VERSION_DELIMITER; + + /* write the decimal field value */ + field=versionArray[part]; + if(field>=100) { + *versionString++=(char)('0'+field/100); + field%=100; + } + if(field>=10) { + *versionString++=(char)('0'+field/10); + field%=10; + } + *versionString++=(char)('0'+field); + } + + /* NUL-terminate */ + *versionString=0; +} + +U_CAPI void U_EXPORT2 +u_getVersion(UVersionInfo versionArray) { + (void)copyright; // Suppress unused variable warning from clang. + u_versionFromString(versionArray, U_ICU_VERSION); +} + +/** + * icucfg.h dependent code + */ + +#if U_ENABLE_DYLOAD && HAVE_DLOPEN && !U_PLATFORM_USES_ONLY_WIN32_API + +#if HAVE_DLFCN_H +#ifdef __MVS__ +#ifndef __SUSV3 +#define __SUSV3 1 +#endif +#endif +#include <dlfcn.h> +#endif /* HAVE_DLFCN_H */ + +U_CAPI void * U_EXPORT2 +uprv_dl_open(const char *libName, UErrorCode *status) { + void *ret = nullptr; + if(U_FAILURE(*status)) return ret; + ret = dlopen(libName, RTLD_NOW|RTLD_GLOBAL); + if(ret==nullptr) { +#ifdef U_TRACE_DYLOAD + printf("dlerror on dlopen(%s): %s\n", libName, dlerror()); +#endif + *status = U_MISSING_RESOURCE_ERROR; + } + return ret; +} + +U_CAPI void U_EXPORT2 +uprv_dl_close(void *lib, UErrorCode *status) { + if(U_FAILURE(*status)) return; + dlclose(lib); +} + +U_CAPI UVoidFunction* U_EXPORT2 +uprv_dlsym_func(void *lib, const char* sym, UErrorCode *status) { + union { + UVoidFunction *fp; + void *vp; + } uret; + uret.fp = nullptr; + if(U_FAILURE(*status)) return uret.fp; + uret.vp = dlsym(lib, sym); + if(uret.vp == nullptr) { +#ifdef U_TRACE_DYLOAD + printf("dlerror on dlsym(%p,%s): %s\n", lib,sym, dlerror()); +#endif + *status = U_MISSING_RESOURCE_ERROR; + } + return uret.fp; +} + +#elif U_ENABLE_DYLOAD && U_PLATFORM_USES_ONLY_WIN32_API && !U_PLATFORM_HAS_WINUWP_API + +/* Windows API implementation. */ +// Note: UWP does not expose/allow these APIs, so the UWP version gets the null implementation. */ + +U_CAPI void * U_EXPORT2 +uprv_dl_open(const char *libName, UErrorCode *status) { + HMODULE lib = nullptr; + + if(U_FAILURE(*status)) return nullptr; + + lib = LoadLibraryA(libName); + + if(lib==nullptr) { + *status = U_MISSING_RESOURCE_ERROR; + } + + return (void*)lib; +} + +U_CAPI void U_EXPORT2 +uprv_dl_close(void *lib, UErrorCode *status) { + HMODULE handle = (HMODULE)lib; + if(U_FAILURE(*status)) return; + + FreeLibrary(handle); + + return; +} + +U_CAPI UVoidFunction* U_EXPORT2 +uprv_dlsym_func(void *lib, const char* sym, UErrorCode *status) { + HMODULE handle = (HMODULE)lib; + UVoidFunction* addr = nullptr; + + if(U_FAILURE(*status) || lib==nullptr) return nullptr; + + addr = (UVoidFunction*)GetProcAddress(handle, sym); + + if(addr==nullptr) { + DWORD lastError = GetLastError(); + if(lastError == ERROR_PROC_NOT_FOUND) { + *status = U_MISSING_RESOURCE_ERROR; + } else { + *status = U_UNSUPPORTED_ERROR; /* other unknown error. */ + } + } + + return addr; +} + +#else + +/* No dynamic loading, null (nonexistent) implementation. */ + +U_CAPI void * U_EXPORT2 +uprv_dl_open(const char *libName, UErrorCode *status) { + (void)libName; + if(U_FAILURE(*status)) return nullptr; + *status = U_UNSUPPORTED_ERROR; + return nullptr; +} + +U_CAPI void U_EXPORT2 +uprv_dl_close(void *lib, UErrorCode *status) { + (void)lib; + if(U_FAILURE(*status)) return; + *status = U_UNSUPPORTED_ERROR; + return; +} + +U_CAPI UVoidFunction* U_EXPORT2 +uprv_dlsym_func(void *lib, const char* sym, UErrorCode *status) { + (void)lib; + (void)sym; + if(U_SUCCESS(*status)) { + *status = U_UNSUPPORTED_ERROR; + } + return (UVoidFunction*)nullptr; +} + +#endif + +/* + * Hey, Emacs, please set the following: + * + * Local Variables: + * indent-tabs-mode: nil + * End: + * + */ |