1// © 2016 and later: Unicode, Inc. and others.
2// License & terms of use: http://www.unicode.org/copyright.html
3/*
4******************************************************************************
5*
6* Copyright (C) 1997-2016, International Business Machines
7* Corporation and others. All Rights Reserved.
8*
9******************************************************************************
10*
11* FILE NAME : putil.c (previously putil.cpp and ptypes.cpp)
12*
13* Date Name Description
14* 04/14/97 aliu Creation.
15* 04/24/97 aliu Added getDefaultDataDirectory() and
16* getDefaultLocaleID().
17* 04/28/97 aliu Rewritten to assume Unix and apply general methods
18* for assumed case. Non-UNIX platforms must be
19* special-cased. Rewrote numeric methods dealing
20* with NaN and Infinity to be platform independent
21* over all IEEE 754 platforms.
22* 05/13/97 aliu Restored sign of timezone
23* (semantics are hours West of GMT)
24* 06/16/98 erm Added IEEE_754 stuff, cleaned up isInfinite, isNan,
25* nextDouble..
26* 07/22/98 stephen Added remainder, max, min, trunc
27* 08/13/98 stephen Added isNegativeInfinity, isPositiveInfinity
28* 08/24/98 stephen Added longBitsFromDouble
29* 09/08/98 stephen Minor changes for Mac Port
30* 03/02/99 stephen Removed openFile(). Added AS400 support.
31* Fixed EBCDIC tables
32* 04/15/99 stephen Converted to C.
33* 06/28/99 stephen Removed mutex locking in u_isBigEndian().
34* 08/04/99 jeffrey R. Added OS/2 changes
35* 11/15/99 helena Integrated S/390 IEEE support.
36* 04/26/01 Barry N. OS/400 support for uprv_getDefaultLocaleID
37* 08/15/01 Steven H. OS/400 support for uprv_getDefaultCodepage
38* 01/03/08 Steven L. Fake Time Support
39******************************************************************************
40*/
41
42// Defines _XOPEN_SOURCE for access to POSIX functions.
43// Must be before any other #includes.
44#include "uposixdefs.h"
45
46// First, the platform type. Need this for U_PLATFORM.
47#include "unicode/platform.h"
48
49#if U_PLATFORM == U_PF_MINGW && defined __STRICT_ANSI__
50/* tzset isn't defined in strict ANSI on MinGW. */
51#undef __STRICT_ANSI__
52#endif
53
54/*
55 * Cygwin with GCC requires inclusion of time.h after the above disabling strict asci mode statement.
56 */
57#include <time.h>
58
59#if !U_PLATFORM_USES_ONLY_WIN32_API
60#include <sys/time.h>
61#endif
62
63/* include the rest of the ICU headers */
64#include "unicode/putil.h"
65#include "unicode/ustring.h"
66#include "putilimp.h"
67#include "uassert.h"
68#include "umutex.h"
69#include "cmemory.h"
70#include "cstring.h"
71#include "locmap.h"
72#include "ucln_cmn.h"
73#include "charstr.h"
74
75/* Include standard headers. */
76#include <stdio.h>
77#include <stdlib.h>
78#include <string.h>
79#include <math.h>
80#include <locale.h>
81#include <float.h>
82
83#ifndef U_COMMON_IMPLEMENTATION
84#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
85#endif
86
87
88/* include system headers */
89#if U_PLATFORM_USES_ONLY_WIN32_API
90 /*
91 * TODO: U_PLATFORM_USES_ONLY_WIN32_API includes MinGW.
92 * Should Cygwin be included as well (U_PLATFORM_HAS_WIN32_API)
93 * to use native APIs as much as possible?
94 */
95#ifndef WIN32_LEAN_AND_MEAN
96# define WIN32_LEAN_AND_MEAN
97#endif
98# define VC_EXTRALEAN
99# define NOUSER
100# define NOSERVICE
101# define NOIME
102# define NOMCX
103# include <windows.h>
104# include "unicode/uloc.h"
105# include "wintz.h"
106#elif U_PLATFORM == U_PF_OS400
107# include <float.h>
108# include <qusec.h> /* error code structure */
109# include <qusrjobi.h>
110# include <qliept.h> /* EPT_CALL macro - this include must be after all other "QSYSINCs" */
111# include <mih/testptr.h> /* For uprv_maximumPtr */
112#elif U_PLATFORM == U_PF_OS390
113# include "unicode/ucnv.h" /* Needed for UCNV_SWAP_LFNL_OPTION_STRING */
114#elif U_PLATFORM_IS_DARWIN_BASED || U_PLATFORM_IS_LINUX_BASED || U_PLATFORM == U_PF_BSD || U_PLATFORM == U_PF_SOLARIS
115# include <limits.h>
116# include <unistd.h>
117# if U_PLATFORM == U_PF_SOLARIS
118# ifndef _XPG4_2
119# define _XPG4_2
120# endif
121# elif U_PLATFORM == U_PF_ANDROID
122# include <sys/system_properties.h>
123# include <dlfcn.h>
124# endif
125#elif U_PLATFORM == U_PF_QNX
126# include <sys/neutrino.h>
127#endif
128
129
130/*
131 * Only include langinfo.h if we have a way to get the codeset. If we later
132 * depend on more feature, we can test on U_HAVE_NL_LANGINFO.
133 *
134 */
135
136#if U_HAVE_NL_LANGINFO_CODESET
137#include <langinfo.h>
138#endif
139
140/**
141 * Simple things (presence of functions, etc) should just go in configure.in and be added to
142 * icucfg.h via autoheader.
143 */
144#if U_PLATFORM_IMPLEMENTS_POSIX
145# if U_PLATFORM == U_PF_OS400
146# define HAVE_DLFCN_H 0
147# define HAVE_DLOPEN 0
148# else
149# ifndef HAVE_DLFCN_H
150# define HAVE_DLFCN_H 1
151# endif
152# ifndef HAVE_DLOPEN
153# define HAVE_DLOPEN 1
154# endif
155# endif
156# ifndef HAVE_GETTIMEOFDAY
157# define HAVE_GETTIMEOFDAY 1
158# endif
159#else
160# define HAVE_DLFCN_H 0
161# define HAVE_DLOPEN 0
162# define HAVE_GETTIMEOFDAY 0
163#endif
164
165U_NAMESPACE_USE
166
167/* Define the extension for data files, again... */
168#define DATA_TYPE "dat"
169
170/* Leave this copyright notice here! */
171static const char copyright[] = U_COPYRIGHT_STRING;
172
173/* floating point implementations ------------------------------------------- */
174
175/* We return QNAN rather than SNAN*/
176#define SIGN 0x80000000U
177
178/* Make it easy to define certain types of constants */
179typedef union {
180 int64_t i64; /* This must be defined first in order to allow the initialization to work. This is a C89 feature. */
181 double d64;
182} BitPatternConversion;
183static const BitPatternConversion gNan = { (int64_t) INT64_C(0x7FF8000000000000) };
184static const BitPatternConversion gInf = { (int64_t) INT64_C(0x7FF0000000000000) };
185
186/*---------------------------------------------------------------------------
187 Platform utilities
188 Our general strategy is to assume we're on a POSIX platform. Platforms which
189 are non-POSIX must declare themselves so. The default POSIX implementation
190 will sometimes work for non-POSIX platforms as well (e.g., the NaN-related
191 functions).
192 ---------------------------------------------------------------------------*/
193
194#if U_PLATFORM_USES_ONLY_WIN32_API || U_PLATFORM == U_PF_OS400
195# undef U_POSIX_LOCALE
196#else
197# define U_POSIX_LOCALE 1
198#endif
199
200/*
201 WARNING! u_topNBytesOfDouble and u_bottomNBytesOfDouble
202 can't be properly optimized by the gcc compiler sometimes (i.e. gcc 3.2).
203*/
204#if !IEEE_754
205static char*
206u_topNBytesOfDouble(double* d, int n)
207{
208#if U_IS_BIG_ENDIAN
209 return (char*)d;
210#else
211 return (char*)(d + 1) - n;
212#endif
213}
214
215static char*
216u_bottomNBytesOfDouble(double* d, int n)
217{
218#if U_IS_BIG_ENDIAN
219 return (char*)(d + 1) - n;
220#else
221 return (char*)d;
222#endif
223}
224#endif /* !IEEE_754 */
225
226#if IEEE_754
227static UBool
228u_signBit(double d) {
229 uint8_t hiByte;
230#if U_IS_BIG_ENDIAN
231 hiByte = *(uint8_t *)&d;
232#else
233 hiByte = *(((uint8_t *)&d) + sizeof(double) - 1);
234#endif
235 return (hiByte & 0x80) != 0;
236}
237#endif
238
239
240
241#if defined (U_DEBUG_FAKETIME)
242/* Override the clock to test things without having to move the system clock.
243 * Assumes POSIX gettimeofday() will function
244 */
245UDate fakeClock_t0 = 0; /** Time to start the clock from **/
246UDate fakeClock_dt = 0; /** Offset (fake time - real time) **/
247UBool fakeClock_set = false; /** True if fake clock has spun up **/
248
249static UDate getUTCtime_real() {
250 struct timeval posixTime;
251 gettimeofday(&posixTime, nullptr);
252 return (UDate)(((int64_t)posixTime.tv_sec * U_MILLIS_PER_SECOND) + (posixTime.tv_usec/1000));
253}
254
255static UDate getUTCtime_fake() {
256 static UMutex fakeClockMutex;
257 umtx_lock(&fakeClockMutex);
258 if(!fakeClock_set) {
259 UDate real = getUTCtime_real();
260 const char *fake_start = getenv("U_FAKETIME_START");
261 if((fake_start!=nullptr) && (fake_start[0]!=0)) {
262 sscanf(fake_start,"%lf",&fakeClock_t0);
263 fakeClock_dt = fakeClock_t0 - real;
264 fprintf(stderr,"U_DEBUG_FAKETIME was set at compile time, so the ICU clock will start at a preset value\n"
265 "env variable U_FAKETIME_START=%.0f (%s) for an offset of %.0f ms from the current time %.0f\n",
266 fakeClock_t0, fake_start, fakeClock_dt, real);
267 } else {
268 fakeClock_dt = 0;
269 fprintf(stderr,"U_DEBUG_FAKETIME was set at compile time, but U_FAKETIME_START was not set.\n"
270 "Set U_FAKETIME_START to the number of milliseconds since 1/1/1970 to set the ICU clock.\n");
271 }
272 fakeClock_set = true;
273 }
274 umtx_unlock(&fakeClockMutex);
275
276 return getUTCtime_real() + fakeClock_dt;
277}
278#endif
279
280#if U_PLATFORM_USES_ONLY_WIN32_API
281typedef union {
282 int64_t int64;
283 FILETIME fileTime;
284} FileTimeConversion; /* This is like a ULARGE_INTEGER */
285
286/* Number of 100 nanoseconds from 1/1/1601 to 1/1/1970 */
287#define EPOCH_BIAS INT64_C(116444736000000000)
288#define HECTONANOSECOND_PER_MILLISECOND 10000
289
290#endif
291
292/*---------------------------------------------------------------------------
293 Universal Implementations
294 These are designed to work on all platforms. Try these, and if they
295 don't work on your platform, then special case your platform with new
296 implementations.
297---------------------------------------------------------------------------*/
298
299U_CAPI UDate U_EXPORT2
300uprv_getUTCtime()
301{
302#if defined(U_DEBUG_FAKETIME)
303 return getUTCtime_fake(); /* Hook for overriding the clock */
304#else
305 return uprv_getRawUTCtime();
306#endif
307}
308
309/* Return UTC (GMT) time measured in milliseconds since 0:00 on 1/1/70.*/
310U_CAPI UDate U_EXPORT2
311uprv_getRawUTCtime()
312{
313#if U_PLATFORM_USES_ONLY_WIN32_API
314
315 FileTimeConversion winTime;
316 GetSystemTimeAsFileTime(&winTime.fileTime);
317 return (UDate)((winTime.int64 - EPOCH_BIAS) / HECTONANOSECOND_PER_MILLISECOND);
318#else
319
320#if HAVE_GETTIMEOFDAY
321 struct timeval posixTime;
322 gettimeofday(&posixTime, nullptr);
323 return (UDate)(((int64_t)posixTime.tv_sec * U_MILLIS_PER_SECOND) + (posixTime.tv_usec/1000));
324#else
325 time_t epochtime;
326 time(&epochtime);
327 return (UDate)epochtime * U_MILLIS_PER_SECOND;
328#endif
329
330#endif
331}
332
333/*-----------------------------------------------------------------------------
334 IEEE 754
335 These methods detect and return NaN and infinity values for doubles
336 conforming to IEEE 754. Platforms which support this standard include X86,
337 Mac 680x0, Mac PowerPC, AIX RS/6000, and most others.
338 If this doesn't work on your platform, you have non-IEEE floating-point, and
339 will need to code your own versions. A naive implementation is to return 0.0
340 for getNaN and getInfinity, and false for isNaN and isInfinite.
341 ---------------------------------------------------------------------------*/
342
343U_CAPI UBool U_EXPORT2
344uprv_isNaN(double number)
345{
346#if IEEE_754
347 BitPatternConversion convertedNumber;
348 convertedNumber.d64 = number;
349 /* Infinity is 0x7FF0000000000000U. Anything greater than that is a NaN */
350 return (UBool)((convertedNumber.i64 & U_INT64_MAX) > gInf.i64);
351
352#elif U_PLATFORM == U_PF_OS390
353 uint32_t highBits = *(uint32_t*)u_topNBytesOfDouble(&number,
354 sizeof(uint32_t));
355 uint32_t lowBits = *(uint32_t*)u_bottomNBytesOfDouble(&number,
356 sizeof(uint32_t));
357
358 return ((highBits & 0x7F080000L) == 0x7F080000L) &&
359 (lowBits == 0x00000000L);
360
361#else
362 /* If your platform doesn't support IEEE 754 but *does* have an NaN value,*/
363 /* you'll need to replace this default implementation with what's correct*/
364 /* for your platform.*/
365 return number != number;
366#endif
367}
368
369U_CAPI UBool U_EXPORT2
370uprv_isInfinite(double number)
371{
372#if IEEE_754
373 BitPatternConversion convertedNumber;
374 convertedNumber.d64 = number;
375 /* Infinity is exactly 0x7FF0000000000000U. */
376 return (UBool)((convertedNumber.i64 & U_INT64_MAX) == gInf.i64);
377#elif U_PLATFORM == U_PF_OS390
378 uint32_t highBits = *(uint32_t*)u_topNBytesOfDouble(&number,
379 sizeof(uint32_t));
380 uint32_t lowBits = *(uint32_t*)u_bottomNBytesOfDouble(&number,
381 sizeof(uint32_t));
382
383 return ((highBits & ~SIGN) == 0x70FF0000L) && (lowBits == 0x00000000L);
384
385#else
386 /* If your platform doesn't support IEEE 754 but *does* have an infinity*/
387 /* value, you'll need to replace this default implementation with what's*/
388 /* correct for your platform.*/
389 return number == (2.0 * number);
390#endif
391}
392
393U_CAPI UBool U_EXPORT2
394uprv_isPositiveInfinity(double number)
395{
396#if IEEE_754 || U_PLATFORM == U_PF_OS390
397 return (UBool)(number > 0 && uprv_isInfinite(number));
398#else
399 return uprv_isInfinite(number);
400#endif
401}
402
403U_CAPI UBool U_EXPORT2
404uprv_isNegativeInfinity(double number)
405{
406#if IEEE_754 || U_PLATFORM == U_PF_OS390
407 return (UBool)(number < 0 && uprv_isInfinite(number));
408
409#else
410 uint32_t highBits = *(uint32_t*)u_topNBytesOfDouble(&number,
411 sizeof(uint32_t));
412 return((highBits & SIGN) && uprv_isInfinite(number));
413
414#endif
415}
416
417U_CAPI double U_EXPORT2
418uprv_getNaN()
419{
420#if IEEE_754 || U_PLATFORM == U_PF_OS390
421 return gNan.d64;
422#else
423 /* If your platform doesn't support IEEE 754 but *does* have an NaN value,*/
424 /* you'll need to replace this default implementation with what's correct*/
425 /* for your platform.*/
426 return 0.0;
427#endif
428}
429
430U_CAPI double U_EXPORT2
431uprv_getInfinity()
432{
433#if IEEE_754 || U_PLATFORM == U_PF_OS390
434 return gInf.d64;
435#else
436 /* If your platform doesn't support IEEE 754 but *does* have an infinity*/
437 /* value, you'll need to replace this default implementation with what's*/
438 /* correct for your platform.*/
439 return 0.0;
440#endif
441}
442
443U_CAPI double U_EXPORT2
444uprv_floor(double x)
445{
446 return floor(x);
447}
448
449U_CAPI double U_EXPORT2
450uprv_ceil(double x)
451{
452 return ceil(x);
453}
454
455U_CAPI double U_EXPORT2
456uprv_round(double x)
457{
458 return uprv_floor(x + 0.5);
459}
460
461U_CAPI double U_EXPORT2
462uprv_fabs(double x)
463{
464 return fabs(x);
465}
466
467U_CAPI double U_EXPORT2
468uprv_modf(double x, double* y)
469{
470 return modf(x, y);
471}
472
473U_CAPI double U_EXPORT2
474uprv_fmod(double x, double y)
475{
476 return fmod(x, y);
477}
478
479U_CAPI double U_EXPORT2
480uprv_pow(double x, double y)
481{
482 /* This is declared as "double pow(double x, double y)" */
483 return pow(x, y);
484}
485
486U_CAPI double U_EXPORT2
487uprv_pow10(int32_t x)
488{
489 return pow(10.0, (double)x);
490}
491
492U_CAPI double U_EXPORT2
493uprv_fmax(double x, double y)
494{
495#if IEEE_754
496 /* first handle NaN*/
497 if(uprv_isNaN(x) || uprv_isNaN(y))
498 return uprv_getNaN();
499
500 /* check for -0 and 0*/
501 if(x == 0.0 && y == 0.0 && u_signBit(x))
502 return y;
503
504#endif
505
506 /* this should work for all flt point w/o NaN and Inf special cases */
507 return (x > y ? x : y);
508}
509
510U_CAPI double U_EXPORT2
511uprv_fmin(double x, double y)
512{
513#if IEEE_754
514 /* first handle NaN*/
515 if(uprv_isNaN(x) || uprv_isNaN(y))
516 return uprv_getNaN();
517
518 /* check for -0 and 0*/
519 if(x == 0.0 && y == 0.0 && u_signBit(y))
520 return y;
521
522#endif
523
524 /* this should work for all flt point w/o NaN and Inf special cases */
525 return (x > y ? y : x);
526}
527
528U_CAPI UBool U_EXPORT2
529uprv_add32_overflow(int32_t a, int32_t b, int32_t* res) {
530 // NOTE: Some compilers (GCC, Clang) have primitives available, like __builtin_add_overflow.
531 // This function could be optimized by calling one of those primitives.
532 auto a64 = static_cast<int64_t>(a);
533 auto b64 = static_cast<int64_t>(b);
534 int64_t res64 = a64 + b64;
535 *res = static_cast<int32_t>(res64);
536 return res64 != *res;
537}
538
539U_CAPI UBool U_EXPORT2
540uprv_mul32_overflow(int32_t a, int32_t b, int32_t* res) {
541 // NOTE: Some compilers (GCC, Clang) have primitives available, like __builtin_mul_overflow.
542 // This function could be optimized by calling one of those primitives.
543 auto a64 = static_cast<int64_t>(a);
544 auto b64 = static_cast<int64_t>(b);
545 int64_t res64 = a64 * b64;
546 *res = static_cast<int32_t>(res64);
547 return res64 != *res;
548}
549
550/**
551 * Truncates the given double.
552 * trunc(3.3) = 3.0, trunc (-3.3) = -3.0
553 * This is different than calling floor() or ceil():
554 * floor(3.3) = 3, floor(-3.3) = -4
555 * ceil(3.3) = 4, ceil(-3.3) = -3
556 */
557U_CAPI double U_EXPORT2
558uprv_trunc(double d)
559{
560#if IEEE_754
561 /* handle error cases*/
562 if(uprv_isNaN(d))
563 return uprv_getNaN();
564 if(uprv_isInfinite(d))
565 return uprv_getInfinity();
566
567 if(u_signBit(d)) /* Signbit() picks up -0.0; d<0 does not. */
568 return ceil(d);
569 else
570 return floor(d);
571
572#else
573 return d >= 0 ? floor(d) : ceil(d);
574
575#endif
576}
577
578/**
579 * Return the largest positive number that can be represented by an integer
580 * type of arbitrary bit length.
581 */
582U_CAPI double U_EXPORT2
583uprv_maxMantissa()
584{
585 return pow(2.0, DBL_MANT_DIG + 1.0) - 1.0;
586}
587
588U_CAPI double U_EXPORT2
589uprv_log(double d)
590{
591 return log(d);
592}
593
594U_CAPI void * U_EXPORT2
595uprv_maximumPtr(void * base)
596{
597#if U_PLATFORM == U_PF_OS400
598 /*
599 * With the provided function we should never be out of range of a given segment
600 * (a traditional/typical segment that is). Our segments have 5 bytes for the
601 * id and 3 bytes for the offset. The key is that the casting takes care of
602 * only retrieving the offset portion minus x1000. Hence, the smallest offset
603 * seen in a program is x001000 and when casted to an int would be 0.
604 * That's why we can only add 0xffefff. Otherwise, we would exceed the segment.
605 *
606 * Currently, 16MB is the current addressing limitation on i5/OS if the activation is
607 * non-TERASPACE. If it is TERASPACE it is 2GB - 4k(header information).
608 * This function determines the activation based on the pointer that is passed in and
609 * calculates the appropriate maximum available size for
610 * each pointer type (TERASPACE and non-TERASPACE)
611 *
612 * Unlike other operating systems, the pointer model isn't determined at
613 * compile time on i5/OS.
614 */
615 if ((base != nullptr) && (_TESTPTR(base, _C_TERASPACE_CHECK))) {
616 /* if it is a TERASPACE pointer the max is 2GB - 4k */
617 return ((void *)(((char *)base)-((uint32_t)(base))+((uint32_t)0x7fffefff)));
618 }
619 /* otherwise 16MB since nullptr ptr is not checkable or the ptr is not TERASPACE */
620 return ((void *)(((char *)base)-((uint32_t)(base))+((uint32_t)0xffefff)));
621
622#else
623 return U_MAX_PTR(base);
624#endif
625}
626
627/*---------------------------------------------------------------------------
628 Platform-specific Implementations
629 Try these, and if they don't work on your platform, then special case your
630 platform with new implementations.
631 ---------------------------------------------------------------------------*/
632
633/* Generic time zone layer -------------------------------------------------- */
634
635/* Time zone utilities */
636U_CAPI void U_EXPORT2
637uprv_tzset()
638{
639#if defined(U_TZSET)
640 U_TZSET();
641#else
642 /* no initialization*/
643#endif
644}
645
646U_CAPI int32_t U_EXPORT2
647uprv_timezone()
648{
649#ifdef U_TIMEZONE
650 return U_TIMEZONE;
651#else
652 time_t t, t1, t2;
653 struct tm tmrec;
654 int32_t tdiff = 0;
655
656 time(&t);
657 uprv_memcpy( &tmrec, localtime(&t), sizeof(tmrec) );
658#if U_PLATFORM != U_PF_IPHONE
659 UBool dst_checked = (tmrec.tm_isdst != 0); /* daylight savings time is checked*/
660#endif
661 t1 = mktime(&tmrec); /* local time in seconds*/
662 uprv_memcpy( &tmrec, gmtime(&t), sizeof(tmrec) );
663 t2 = mktime(&tmrec); /* GMT (or UTC) in seconds*/
664 tdiff = t2 - t1;
665
666#if U_PLATFORM != U_PF_IPHONE
667 /* imitate NT behaviour, which returns same timezone offset to GMT for
668 winter and summer.
669 This does not work on all platforms. For instance, on glibc on Linux
670 and on Mac OS 10.5, tdiff calculated above remains the same
671 regardless of whether DST is in effect or not. iOS is another
672 platform where this does not work. Linux + glibc and Mac OS 10.5
673 have U_TIMEZONE defined so that this code is not reached.
674 */
675 if (dst_checked)
676 tdiff += 3600;
677#endif
678 return tdiff;
679#endif
680}
681
682/* Note that U_TZNAME does *not* have to be tzname, but if it is,
683 some platforms need to have it declared here. */
684
685#if defined(U_TZNAME) && (U_PLATFORM == U_PF_IRIX || U_PLATFORM_IS_DARWIN_BASED)
686/* RS6000 and others reject char **tzname. */
687extern U_IMPORT char *U_TZNAME[];
688#endif
689
690#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)
691/* These platforms are likely to use Olson timezone IDs. */
692/* common targets of the symbolic link at TZDEFAULT are:
693 * "/usr/share/zoneinfo/<olsonID>" default, older Linux distros, macOS to 10.12
694 * "../usr/share/zoneinfo/<olsonID>" newer Linux distros: Red Hat Enterprise Linux 7, Ubuntu 16, SuSe Linux 12
695 * "/usr/share/lib/zoneinfo/<olsonID>" Solaris
696 * "../usr/share/lib/zoneinfo/<olsonID>" Solaris
697 * "/var/db/timezone/zoneinfo/<olsonID>" macOS 10.13
698 * To avoid checking lots of paths, just check that the target path
699 * before the <olsonID> ends with "/zoneinfo/", and the <olsonID> is valid.
700 */
701
702#define CHECK_LOCALTIME_LINK 1
703#if U_PLATFORM_IS_DARWIN_BASED
704#include <tzfile.h>
705#define TZZONEINFO (TZDIR "/")
706#elif U_PLATFORM == U_PF_SOLARIS
707#define TZDEFAULT "/etc/localtime"
708#define TZZONEINFO "/usr/share/lib/zoneinfo/"
709#define TZ_ENV_CHECK "localtime"
710#else
711#define TZDEFAULT "/etc/localtime"
712#define TZZONEINFO "/usr/share/zoneinfo/"
713#endif
714#define TZZONEINFOTAIL "/zoneinfo/"
715#if U_HAVE_DIRENT_H
716#define TZFILE_SKIP "posixrules" /* tz file to skip when searching. */
717/* Some Linux distributions have 'localtime' in /usr/share/zoneinfo
718 symlinked to /etc/localtime, which makes searchForTZFile return
719 'localtime' when it's the first match. */
720#define TZFILE_SKIP2 "localtime"
721#define SEARCH_TZFILE
722#include <dirent.h> /* Needed to search through system timezone files */
723#endif
724static char gTimeZoneBuffer[PATH_MAX];
725static const char *gTimeZoneBufferPtr = nullptr;
726#endif
727
728#if !U_PLATFORM_USES_ONLY_WIN32_API
729#define isNonDigit(ch) (ch < '0' || '9' < ch)
730#define isDigit(ch) ('0' <= ch && ch <= '9')
731static UBool isValidOlsonID(const char *id) {
732 int32_t idx = 0;
733 int32_t idxMax = 0;
734
735 /* Determine if this is something like Iceland (Olson ID)
736 or AST4ADT (non-Olson ID) */
737 while (id[idx] && isNonDigit(id[idx]) && id[idx] != ',') {
738 idx++;
739 }
740
741 /* Allow at maximum 2 numbers at the end of the id to support zone id's
742 like GMT+11. */
743 idxMax = idx + 2;
744 while (id[idx] && isDigit(id[idx]) && idx < idxMax) {
745 idx++;
746 }
747
748 /* If we went through the whole string, then it might be okay.
749 The timezone is sometimes set to "CST-7CDT", "CST6CDT5,J129,J131/19:30",
750 "GRNLNDST3GRNLNDDT" or similar, so we cannot use it.
751 The rest of the time it could be an Olson ID. George */
752 return (UBool)(id[idx] == 0
753 || uprv_strcmp(id, "PST8PDT") == 0
754 || uprv_strcmp(id, "MST7MDT") == 0
755 || uprv_strcmp(id, "CST6CDT") == 0
756 || uprv_strcmp(id, "EST5EDT") == 0);
757}
758
759/* On some Unix-like OS, 'posix' subdirectory in
760 /usr/share/zoneinfo replicates the top-level contents. 'right'
761 subdirectory has the same set of files, but individual files
762 are different from those in the top-level directory or 'posix'
763 because 'right' has files for TAI (Int'l Atomic Time) while 'posix'
764 has files for UTC.
765 When the first match for /etc/localtime is in either of them
766 (usually in posix because 'right' has different file contents),
767 or TZ environment variable points to one of them, createTimeZone
768 fails because, say, 'posix/America/New_York' is not an Olson
769 timezone id ('America/New_York' is). So, we have to skip
770 'posix/' and 'right/' at the beginning. */
771static void skipZoneIDPrefix(const char** id) {
772 if (uprv_strncmp(*id, "posix/", 6) == 0
773 || uprv_strncmp(*id, "right/", 6) == 0)
774 {
775 *id += 6;
776 }
777}
778#endif
779
780#if defined(U_TZNAME) && !U_PLATFORM_USES_ONLY_WIN32_API
781
782#define CONVERT_HOURS_TO_SECONDS(offset) (int32_t)(offset*3600)
783typedef struct OffsetZoneMapping {
784 int32_t offsetSeconds;
785 int32_t daylightType; /* 0=U_DAYLIGHT_NONE, 1=daylight in June-U_DAYLIGHT_JUNE, 2=daylight in December=U_DAYLIGHT_DECEMBER*/
786 const char *stdID;
787 const char *dstID;
788 const char *olsonID;
789} OffsetZoneMapping;
790
791enum { U_DAYLIGHT_NONE=0,U_DAYLIGHT_JUNE=1,U_DAYLIGHT_DECEMBER=2 };
792
793/*
794This list tries to disambiguate a set of abbreviated timezone IDs and offsets
795and maps it to an Olson ID.
796Before adding anything to this list, take a look at
797icu/source/tools/tzcode/tz.alias
798Sometimes no daylight savings (0) is important to define due to aliases.
799This list can be tested with icu/source/test/compat/tzone.pl
800More values could be added to daylightType to increase precision.
801*/
802static const struct OffsetZoneMapping OFFSET_ZONE_MAPPINGS[] = {
803 {-45900, 2, "CHAST", "CHADT", "Pacific/Chatham"},
804 {-43200, 1, "PETT", "PETST", "Asia/Kamchatka"},
805 {-43200, 2, "NZST", "NZDT", "Pacific/Auckland"},
806 {-43200, 1, "ANAT", "ANAST", "Asia/Anadyr"},
807 {-39600, 1, "MAGT", "MAGST", "Asia/Magadan"},
808 {-37800, 2, "LHST", "LHST", "Australia/Lord_Howe"},
809 {-36000, 2, "EST", "EST", "Australia/Sydney"},
810 {-36000, 1, "SAKT", "SAKST", "Asia/Sakhalin"},
811 {-36000, 1, "VLAT", "VLAST", "Asia/Vladivostok"},
812 {-34200, 2, "CST", "CST", "Australia/South"},
813 {-32400, 1, "YAKT", "YAKST", "Asia/Yakutsk"},
814 {-32400, 1, "CHOT", "CHOST", "Asia/Choibalsan"},
815 {-31500, 2, "CWST", "CWST", "Australia/Eucla"},
816 {-28800, 1, "IRKT", "IRKST", "Asia/Irkutsk"},
817 {-28800, 1, "ULAT", "ULAST", "Asia/Ulaanbaatar"},
818 {-28800, 2, "WST", "WST", "Australia/West"},
819 {-25200, 1, "HOVT", "HOVST", "Asia/Hovd"},
820 {-25200, 1, "KRAT", "KRAST", "Asia/Krasnoyarsk"},
821 {-21600, 1, "NOVT", "NOVST", "Asia/Novosibirsk"},
822 {-21600, 1, "OMST", "OMSST", "Asia/Omsk"},
823 {-18000, 1, "YEKT", "YEKST", "Asia/Yekaterinburg"},
824 {-14400, 1, "SAMT", "SAMST", "Europe/Samara"},
825 {-14400, 1, "AMT", "AMST", "Asia/Yerevan"},
826 {-14400, 1, "AZT", "AZST", "Asia/Baku"},
827 {-10800, 1, "AST", "ADT", "Asia/Baghdad"},
828 {-10800, 1, "MSK", "MSD", "Europe/Moscow"},
829 {-10800, 1, "VOLT", "VOLST", "Europe/Volgograd"},
830 {-7200, 0, "EET", "CEST", "Africa/Tripoli"},
831 {-7200, 1, "EET", "EEST", "Europe/Athens"}, /* Conflicts with Africa/Cairo */
832 {-7200, 1, "IST", "IDT", "Asia/Jerusalem"},
833 {-3600, 0, "CET", "WEST", "Africa/Algiers"},
834 {-3600, 2, "WAT", "WAST", "Africa/Windhoek"},
835 {0, 1, "GMT", "IST", "Europe/Dublin"},
836 {0, 1, "GMT", "BST", "Europe/London"},
837 {0, 0, "WET", "WEST", "Africa/Casablanca"},
838 {0, 0, "WET", "WET", "Africa/El_Aaiun"},
839 {3600, 1, "AZOT", "AZOST", "Atlantic/Azores"},
840 {3600, 1, "EGT", "EGST", "America/Scoresbysund"},
841 {10800, 1, "PMST", "PMDT", "America/Miquelon"},
842 {10800, 2, "UYT", "UYST", "America/Montevideo"},
843 {10800, 1, "WGT", "WGST", "America/Godthab"},
844 {10800, 2, "BRT", "BRST", "Brazil/East"},
845 {12600, 1, "NST", "NDT", "America/St_Johns"},
846 {14400, 1, "AST", "ADT", "Canada/Atlantic"},
847 {14400, 2, "AMT", "AMST", "America/Cuiaba"},
848 {14400, 2, "CLT", "CLST", "Chile/Continental"},
849 {14400, 2, "FKT", "FKST", "Atlantic/Stanley"},
850 {14400, 2, "PYT", "PYST", "America/Asuncion"},
851 {18000, 1, "CST", "CDT", "America/Havana"},
852 {18000, 1, "EST", "EDT", "US/Eastern"}, /* Conflicts with America/Grand_Turk */
853 {21600, 2, "EAST", "EASST", "Chile/EasterIsland"},
854 {21600, 0, "CST", "MDT", "Canada/Saskatchewan"},
855 {21600, 0, "CST", "CDT", "America/Guatemala"},
856 {21600, 1, "CST", "CDT", "US/Central"}, /* Conflicts with Mexico/General */
857 {25200, 1, "MST", "MDT", "US/Mountain"}, /* Conflicts with Mexico/BajaSur */
858 {28800, 0, "PST", "PST", "Pacific/Pitcairn"},
859 {28800, 1, "PST", "PDT", "US/Pacific"}, /* Conflicts with Mexico/BajaNorte */
860 {32400, 1, "AKST", "AKDT", "US/Alaska"},
861 {36000, 1, "HAST", "HADT", "US/Aleutian"}
862};
863
864/*#define DEBUG_TZNAME*/
865
866static const char* remapShortTimeZone(const char *stdID, const char *dstID, int32_t daylightType, int32_t offset)
867{
868 int32_t idx;
869#ifdef DEBUG_TZNAME
870 fprintf(stderr, "TZ=%s std=%s dst=%s daylight=%d offset=%d\n", getenv("TZ"), stdID, dstID, daylightType, offset);
871#endif
872 for (idx = 0; idx < UPRV_LENGTHOF(OFFSET_ZONE_MAPPINGS); idx++)
873 {
874 if (offset == OFFSET_ZONE_MAPPINGS[idx].offsetSeconds
875 && daylightType == OFFSET_ZONE_MAPPINGS[idx].daylightType
876 && strcmp(OFFSET_ZONE_MAPPINGS[idx].stdID, stdID) == 0
877 && strcmp(OFFSET_ZONE_MAPPINGS[idx].dstID, dstID) == 0)
878 {
879 return OFFSET_ZONE_MAPPINGS[idx].olsonID;
880 }
881 }
882 return nullptr;
883}
884#endif
885
886#ifdef SEARCH_TZFILE
887#define MAX_READ_SIZE 512
888
889typedef struct DefaultTZInfo {
890 char* defaultTZBuffer;
891 int64_t defaultTZFileSize;
892 FILE* defaultTZFilePtr;
893 UBool defaultTZstatus;
894 int32_t defaultTZPosition;
895} DefaultTZInfo;
896
897/*
898 * This method compares the two files given to see if they are a match.
899 * It is currently use to compare two TZ files.
900 */
901static UBool compareBinaryFiles(const char* defaultTZFileName, const char* TZFileName, DefaultTZInfo* tzInfo) {
902 FILE* file;
903 int64_t sizeFile;
904 int64_t sizeFileLeft;
905 int32_t sizeFileRead;
906 int32_t sizeFileToRead;
907 char bufferFile[MAX_READ_SIZE];
908 UBool result = true;
909
910 if (tzInfo->defaultTZFilePtr == nullptr) {
911 tzInfo->defaultTZFilePtr = fopen(defaultTZFileName, "r");
912 }
913 file = fopen(TZFileName, "r");
914
915 tzInfo->defaultTZPosition = 0; /* reset position to begin search */
916
917 if (file != nullptr && tzInfo->defaultTZFilePtr != nullptr) {
918 /* First check that the file size are equal. */
919 if (tzInfo->defaultTZFileSize == 0) {
920 fseek(tzInfo->defaultTZFilePtr, 0, SEEK_END);
921 tzInfo->defaultTZFileSize = ftell(tzInfo->defaultTZFilePtr);
922 }
923 fseek(file, 0, SEEK_END);
924 sizeFile = ftell(file);
925 sizeFileLeft = sizeFile;
926
927 if (sizeFile != tzInfo->defaultTZFileSize) {
928 result = false;
929 } else {
930 /* Store the data from the files in separate buffers and
931 * compare each byte to determine equality.
932 */
933 if (tzInfo->defaultTZBuffer == nullptr) {
934 rewind(tzInfo->defaultTZFilePtr);
935 tzInfo->defaultTZBuffer = (char*)uprv_malloc(sizeof(char) * tzInfo->defaultTZFileSize);
936 sizeFileRead = fread(tzInfo->defaultTZBuffer, 1, tzInfo->defaultTZFileSize, tzInfo->defaultTZFilePtr);
937 }
938 rewind(file);
939 while(sizeFileLeft > 0) {
940 uprv_memset(bufferFile, 0, MAX_READ_SIZE);
941 sizeFileToRead = sizeFileLeft < MAX_READ_SIZE ? sizeFileLeft : MAX_READ_SIZE;
942
943 sizeFileRead = fread(bufferFile, 1, sizeFileToRead, file);
944 if (memcmp(tzInfo->defaultTZBuffer + tzInfo->defaultTZPosition, bufferFile, sizeFileRead) != 0) {
945 result = false;
946 break;
947 }
948 sizeFileLeft -= sizeFileRead;
949 tzInfo->defaultTZPosition += sizeFileRead;
950 }
951 }
952 } else {
953 result = false;
954 }
955
956 if (file != nullptr) {
957 fclose(file);
958 }
959
960 return result;
961}
962
963
964/* dirent also lists two entries: "." and ".." that we can safely ignore. */
965#define SKIP1 "."
966#define SKIP2 ".."
967static UBool U_CALLCONV putil_cleanup();
968static CharString *gSearchTZFileResult = nullptr;
969
970/*
971 * This method recursively traverses the directory given for a matching TZ file and returns the first match.
972 * This function is not thread safe - it uses a global, gSearchTZFileResult, to hold its results.
973 */
974static char* searchForTZFile(const char* path, DefaultTZInfo* tzInfo) {
975 DIR* dirp = nullptr;
976 struct dirent* dirEntry = nullptr;
977 char* result = nullptr;
978 UErrorCode status = U_ZERO_ERROR;
979
980 /* Save the current path */
981 CharString curpath(path, -1, status);
982 if (U_FAILURE(status)) {
983 goto cleanupAndReturn;
984 }
985
986 dirp = opendir(path);
987 if (dirp == nullptr) {
988 goto cleanupAndReturn;
989 }
990
991 if (gSearchTZFileResult == nullptr) {
992 gSearchTZFileResult = new CharString;
993 if (gSearchTZFileResult == nullptr) {
994 goto cleanupAndReturn;
995 }
996 ucln_common_registerCleanup(UCLN_COMMON_PUTIL, putil_cleanup);
997 }
998
999 /* Check each entry in the directory. */
1000 while((dirEntry = readdir(dirp)) != nullptr) {
1001 const char* dirName = dirEntry->d_name;
1002 if (uprv_strcmp(dirName, SKIP1) != 0 && uprv_strcmp(dirName, SKIP2) != 0
1003 && uprv_strcmp(TZFILE_SKIP, dirName) != 0 && uprv_strcmp(TZFILE_SKIP2, dirName) != 0) {
1004 /* Create a newpath with the new entry to test each entry in the directory. */
1005 CharString newpath(curpath, status);
1006 newpath.append(dirName, -1, status);
1007 if (U_FAILURE(status)) {
1008 break;
1009 }
1010
1011 DIR* subDirp = nullptr;
1012 if ((subDirp = opendir(newpath.data())) != nullptr) {
1013 /* If this new path is a directory, make a recursive call with the newpath. */
1014 closedir(subDirp);
1015 newpath.append('/', status);
1016 if (U_FAILURE(status)) {
1017 break;
1018 }
1019 result = searchForTZFile(newpath.data(), tzInfo);
1020 /*
1021 Have to get out here. Otherwise, we'd keep looking
1022 and return the first match in the top-level directory
1023 if there's a match in the top-level. If not, this function
1024 would return nullptr and set gTimeZoneBufferPtr to nullptr in initDefault().
1025 It worked without this in most cases because we have a fallback of calling
1026 localtime_r to figure out the default timezone.
1027 */
1028 if (result != nullptr)
1029 break;
1030 } else {
1031 if(compareBinaryFiles(TZDEFAULT, newpath.data(), tzInfo)) {
1032 int32_t amountToSkip = sizeof(TZZONEINFO) - 1;
1033 if (amountToSkip > newpath.length()) {
1034 amountToSkip = newpath.length();
1035 }
1036 const char* zoneid = newpath.data() + amountToSkip;
1037 skipZoneIDPrefix(&zoneid);
1038 gSearchTZFileResult->clear();
1039 gSearchTZFileResult->append(zoneid, -1, status);
1040 if (U_FAILURE(status)) {
1041 break;
1042 }
1043 result = gSearchTZFileResult->data();
1044 /* Get out after the first one found. */
1045 break;
1046 }
1047 }
1048 }
1049 }
1050
1051 cleanupAndReturn:
1052 if (dirp) {
1053 closedir(dirp);
1054 }
1055 return result;
1056}
1057#endif
1058
1059#if U_PLATFORM == U_PF_ANDROID
1060typedef int(system_property_read_callback)(const prop_info* info,
1061 void (*callback)(void* cookie,
1062 const char* name,
1063 const char* value,
1064 uint32_t serial),
1065 void* cookie);
1066typedef int(system_property_get)(const char*, char*);
1067
1068static char gAndroidTimeZone[PROP_VALUE_MAX] = { '\0' };
1069
1070static void u_property_read(void* cookie, const char* name, const char* value,
1071 uint32_t serial) {
1072 uprv_strcpy((char* )cookie, value);
1073}
1074#endif
1075
1076U_CAPI void U_EXPORT2
1077uprv_tzname_clear_cache()
1078{
1079#if U_PLATFORM == U_PF_ANDROID
1080 /* Android's timezone is stored in system property. */
1081 gAndroidTimeZone[0] = '\0';
1082 void* libc = dlopen("libc.so", RTLD_NOLOAD);
1083 if (libc) {
1084 /* Android API 26+ has new API to get system property and old API
1085 * (__system_property_get) is deprecated */
1086 system_property_read_callback* property_read_callback =
1087 (system_property_read_callback*)dlsym(
1088 libc, "__system_property_read_callback");
1089 if (property_read_callback) {
1090 const prop_info* info =
1091 __system_property_find("persist.sys.timezone");
1092 if (info) {
1093 property_read_callback(info, &u_property_read, gAndroidTimeZone);
1094 }
1095 } else {
1096 system_property_get* property_get =
1097 (system_property_get*)dlsym(libc, "__system_property_get");
1098 if (property_get) {
1099 property_get("persist.sys.timezone", gAndroidTimeZone);
1100 }
1101 }
1102 dlclose(libc);
1103 }
1104#endif
1105
1106#if defined(CHECK_LOCALTIME_LINK) && !defined(DEBUG_SKIP_LOCALTIME_LINK)
1107 gTimeZoneBufferPtr = nullptr;
1108#endif
1109}
1110
1111U_CAPI const char* U_EXPORT2
1112uprv_tzname(int n)
1113{
1114 (void)n; // Avoid unreferenced parameter warning.
1115 const char *tzid = nullptr;
1116#if U_PLATFORM_USES_ONLY_WIN32_API
1117 tzid = uprv_detectWindowsTimeZone();
1118
1119 if (tzid != nullptr) {
1120 return tzid;
1121 }
1122
1123#ifndef U_TZNAME
1124 // The return value is free'd in timezone.cpp on Windows because
1125 // the other code path returns a pointer to a heap location.
1126 // If we don't have a name already, then tzname wouldn't be any
1127 // better, so just fall back.
1128 return uprv_strdup("");
1129#endif // !U_TZNAME
1130
1131#else
1132
1133/*#if U_PLATFORM_IS_DARWIN_BASED
1134 int ret;
1135
1136 tzid = getenv("TZFILE");
1137 if (tzid != nullptr) {
1138 return tzid;
1139 }
1140#endif*/
1141
1142/* This code can be temporarily disabled to test tzname resolution later on. */
1143#ifndef DEBUG_TZNAME
1144#if U_PLATFORM == U_PF_ANDROID
1145 tzid = gAndroidTimeZone;
1146#else
1147 tzid = getenv("TZ");
1148#endif
1149 if (tzid != nullptr && isValidOlsonID(tzid)
1150#if U_PLATFORM == U_PF_SOLARIS
1151 /* Don't misinterpret TZ "localtime" on Solaris as a time zone name. */
1152 && uprv_strcmp(tzid, TZ_ENV_CHECK) != 0
1153#endif
1154 ) {
1155 /* The colon forces tzset() to treat the remainder as zoneinfo path */
1156 if (tzid[0] == ':') {
1157 tzid++;
1158 }
1159 /* This might be a good Olson ID. */
1160 skipZoneIDPrefix(&tzid);
1161 return tzid;
1162 }
1163 /* else U_TZNAME will give a better result. */
1164#endif
1165
1166#if defined(CHECK_LOCALTIME_LINK) && !defined(DEBUG_SKIP_LOCALTIME_LINK)
1167 /* Caller must handle threading issues */
1168 if (gTimeZoneBufferPtr == nullptr) {
1169 /*
1170 This is a trick to look at the name of the link to get the Olson ID
1171 because the tzfile contents is underspecified.
1172 This isn't guaranteed to work because it may not be a symlink.
1173 */
1174 char *ret = realpath(TZDEFAULT, gTimeZoneBuffer);
1175 if (ret != nullptr && uprv_strcmp(TZDEFAULT, gTimeZoneBuffer) != 0) {
1176 int32_t tzZoneInfoTailLen = uprv_strlen(TZZONEINFOTAIL);
1177 const char *tzZoneInfoTailPtr = uprv_strstr(gTimeZoneBuffer, TZZONEINFOTAIL);
1178 if (tzZoneInfoTailPtr != nullptr) {
1179 tzZoneInfoTailPtr += tzZoneInfoTailLen;
1180 skipZoneIDPrefix(&tzZoneInfoTailPtr);
1181 if (isValidOlsonID(tzZoneInfoTailPtr)) {
1182 return (gTimeZoneBufferPtr = tzZoneInfoTailPtr);
1183 }
1184 }
1185 } else {
1186#if defined(SEARCH_TZFILE)
1187 DefaultTZInfo* tzInfo = (DefaultTZInfo*)uprv_malloc(sizeof(DefaultTZInfo));
1188 if (tzInfo != nullptr) {
1189 tzInfo->defaultTZBuffer = nullptr;
1190 tzInfo->defaultTZFileSize = 0;
1191 tzInfo->defaultTZFilePtr = nullptr;
1192 tzInfo->defaultTZstatus = false;
1193 tzInfo->defaultTZPosition = 0;
1194
1195 gTimeZoneBufferPtr = searchForTZFile(TZZONEINFO, tzInfo);
1196
1197 /* Free previously allocated memory */
1198 if (tzInfo->defaultTZBuffer != nullptr) {
1199 uprv_free(tzInfo->defaultTZBuffer);
1200 }
1201 if (tzInfo->defaultTZFilePtr != nullptr) {
1202 fclose(tzInfo->defaultTZFilePtr);
1203 }
1204 uprv_free(tzInfo);
1205 }
1206
1207 if (gTimeZoneBufferPtr != nullptr && isValidOlsonID(gTimeZoneBufferPtr)) {
1208 return gTimeZoneBufferPtr;
1209 }
1210#endif
1211 }
1212 }
1213 else {
1214 return gTimeZoneBufferPtr;
1215 }
1216#endif
1217#endif
1218
1219#ifdef U_TZNAME
1220#if U_PLATFORM_USES_ONLY_WIN32_API
1221 /* The return value is free'd in timezone.cpp on Windows because
1222 * the other code path returns a pointer to a heap location. */
1223 return uprv_strdup(U_TZNAME[n]);
1224#else
1225 /*
1226 U_TZNAME is usually a non-unique abbreviation, which isn't normally usable.
1227 So we remap the abbreviation to an olson ID.
1228
1229 Since Windows exposes a little more timezone information,
1230 we normally don't use this code on Windows because
1231 uprv_detectWindowsTimeZone should have already given the correct answer.
1232 */
1233 {
1234 struct tm juneSol, decemberSol;
1235 int daylightType;
1236 static const time_t juneSolstice=1182478260; /*2007-06-21 18:11 UT*/
1237 static const time_t decemberSolstice=1198332540; /*2007-12-22 06:09 UT*/
1238
1239 /* This probing will tell us when daylight savings occurs. */
1240 localtime_r(&juneSolstice, &juneSol);
1241 localtime_r(&decemberSolstice, &decemberSol);
1242 if(decemberSol.tm_isdst > 0) {
1243 daylightType = U_DAYLIGHT_DECEMBER;
1244 } else if(juneSol.tm_isdst > 0) {
1245 daylightType = U_DAYLIGHT_JUNE;
1246 } else {
1247 daylightType = U_DAYLIGHT_NONE;
1248 }
1249 tzid = remapShortTimeZone(U_TZNAME[0], U_TZNAME[1], daylightType, uprv_timezone());
1250 if (tzid != nullptr) {
1251 return tzid;
1252 }
1253 }
1254 return U_TZNAME[n];
1255#endif
1256#else
1257 return "";
1258#endif
1259}
1260
1261/* Get and set the ICU data directory --------------------------------------- */
1262
1263static icu::UInitOnce gDataDirInitOnce {};
1264static char *gDataDirectory = nullptr;
1265
1266UInitOnce gTimeZoneFilesInitOnce {};
1267static CharString *gTimeZoneFilesDirectory = nullptr;
1268
1269#if U_POSIX_LOCALE || U_PLATFORM_USES_ONLY_WIN32_API
1270 static const char *gCorrectedPOSIXLocale = nullptr; /* Sometimes heap allocated */
1271 static bool gCorrectedPOSIXLocaleHeapAllocated = false;
1272#endif
1273
1274static UBool U_CALLCONV putil_cleanup()
1275{
1276 if (gDataDirectory && *gDataDirectory) {
1277 uprv_free(gDataDirectory);
1278 }
1279 gDataDirectory = nullptr;
1280 gDataDirInitOnce.reset();
1281
1282 delete gTimeZoneFilesDirectory;
1283 gTimeZoneFilesDirectory = nullptr;
1284 gTimeZoneFilesInitOnce.reset();
1285
1286#ifdef SEARCH_TZFILE
1287 delete gSearchTZFileResult;
1288 gSearchTZFileResult = nullptr;
1289#endif
1290
1291#if U_POSIX_LOCALE || U_PLATFORM_USES_ONLY_WIN32_API
1292 if (gCorrectedPOSIXLocale && gCorrectedPOSIXLocaleHeapAllocated) {
1293 uprv_free(const_cast<char *>(gCorrectedPOSIXLocale));
1294 gCorrectedPOSIXLocale = nullptr;
1295 gCorrectedPOSIXLocaleHeapAllocated = false;
1296 }
1297#endif
1298 return true;
1299}
1300
1301/*
1302 * Set the data directory.
1303 * Make a copy of the passed string, and set the global data dir to point to it.
1304 */
1305U_CAPI void U_EXPORT2
1306u_setDataDirectory(const char *directory) {
1307 char *newDataDir;
1308 int32_t length;
1309
1310 if(directory==nullptr || *directory==0) {
1311 /* A small optimization to prevent the malloc and copy when the
1312 shared library is used, and this is a way to make sure that nullptr
1313 is never returned.
1314 */
1315 newDataDir = (char *)"";
1316 }
1317 else {
1318 length=(int32_t)uprv_strlen(directory);
1319 newDataDir = (char *)uprv_malloc(length + 2);
1320 /* Exit out if newDataDir could not be created. */
1321 if (newDataDir == nullptr) {
1322 return;
1323 }
1324 uprv_strcpy(newDataDir, directory);
1325
1326#if (U_FILE_SEP_CHAR != U_FILE_ALT_SEP_CHAR)
1327 {
1328 char *p;
1329 while((p = uprv_strchr(newDataDir, U_FILE_ALT_SEP_CHAR)) != nullptr) {
1330 *p = U_FILE_SEP_CHAR;
1331 }
1332 }
1333#endif
1334 }
1335
1336 if (gDataDirectory && *gDataDirectory) {
1337 uprv_free(gDataDirectory);
1338 }
1339 gDataDirectory = newDataDir;
1340 ucln_common_registerCleanup(UCLN_COMMON_PUTIL, putil_cleanup);
1341}
1342
1343U_CAPI UBool U_EXPORT2
1344uprv_pathIsAbsolute(const char *path)
1345{
1346 if(!path || !*path) {
1347 return false;
1348 }
1349
1350 if(*path == U_FILE_SEP_CHAR) {
1351 return true;
1352 }
1353
1354#if (U_FILE_SEP_CHAR != U_FILE_ALT_SEP_CHAR)
1355 if(*path == U_FILE_ALT_SEP_CHAR) {
1356 return true;
1357 }
1358#endif
1359
1360#if U_PLATFORM_USES_ONLY_WIN32_API
1361 if( (((path[0] >= 'A') && (path[0] <= 'Z')) ||
1362 ((path[0] >= 'a') && (path[0] <= 'z'))) &&
1363 path[1] == ':' ) {
1364 return true;
1365 }
1366#endif
1367
1368 return false;
1369}
1370
1371/* Backup setting of ICU_DATA_DIR_PREFIX_ENV_VAR
1372 (needed for some Darwin ICU build environments) */
1373#if U_PLATFORM_IS_DARWIN_BASED && defined(TARGET_OS_SIMULATOR) && TARGET_OS_SIMULATOR
1374# if !defined(ICU_DATA_DIR_PREFIX_ENV_VAR)
1375# define ICU_DATA_DIR_PREFIX_ENV_VAR "IPHONE_SIMULATOR_ROOT"
1376# endif
1377#endif
1378
1379#if defined(ICU_DATA_DIR_WINDOWS)
1380// Helper function to get the ICU Data Directory under the Windows directory location.
1381static BOOL U_CALLCONV getIcuDataDirectoryUnderWindowsDirectory(char* directoryBuffer, UINT bufferLength)
1382{
1383 wchar_t windowsPath[MAX_PATH];
1384 char windowsPathUtf8[MAX_PATH];
1385
1386 UINT length = GetSystemWindowsDirectoryW(windowsPath, UPRV_LENGTHOF(windowsPath));
1387 if ((length > 0) && (length < (UPRV_LENGTHOF(windowsPath) - 1))) {
1388 // Convert UTF-16 to a UTF-8 string.
1389 UErrorCode status = U_ZERO_ERROR;
1390 int32_t windowsPathUtf8Len = 0;
1391 u_strToUTF8(windowsPathUtf8, static_cast<int32_t>(UPRV_LENGTHOF(windowsPathUtf8)),
1392 &windowsPathUtf8Len, reinterpret_cast<const char16_t*>(windowsPath), -1, &status);
1393
1394 if (U_SUCCESS(status) && (status != U_STRING_NOT_TERMINATED_WARNING) &&
1395 (windowsPathUtf8Len < (UPRV_LENGTHOF(windowsPathUtf8) - 1))) {
1396 // Ensure it always has a separator, so we can append the ICU data path.
1397 if (windowsPathUtf8[windowsPathUtf8Len - 1] != U_FILE_SEP_CHAR) {
1398 windowsPathUtf8[windowsPathUtf8Len++] = U_FILE_SEP_CHAR;
1399 windowsPathUtf8[windowsPathUtf8Len] = '\0';
1400 }
1401 // Check if the concatenated string will fit.
1402 if ((windowsPathUtf8Len + UPRV_LENGTHOF(ICU_DATA_DIR_WINDOWS)) < bufferLength) {
1403 uprv_strcpy(directoryBuffer, windowsPathUtf8);
1404 uprv_strcat(directoryBuffer, ICU_DATA_DIR_WINDOWS);
1405 return true;
1406 }
1407 }
1408 }
1409
1410 return false;
1411}
1412#endif
1413
1414static void U_CALLCONV dataDirectoryInitFn() {
1415 /* If we already have the directory, then return immediately. Will happen if user called
1416 * u_setDataDirectory().
1417 */
1418 if (gDataDirectory) {
1419 return;
1420 }
1421
1422 const char *path = nullptr;
1423#if defined(ICU_DATA_DIR_PREFIX_ENV_VAR)
1424 char datadir_path_buffer[PATH_MAX];
1425#endif
1426
1427 /*
1428 When ICU_NO_USER_DATA_OVERRIDE is defined, users aren't allowed to
1429 override ICU's data with the ICU_DATA environment variable. This prevents
1430 problems where multiple custom copies of ICU's specific version of data
1431 are installed on a system. Either the application must define the data
1432 directory with u_setDataDirectory, define ICU_DATA_DIR when compiling
1433 ICU, set the data with udata_setCommonData or trust that all of the
1434 required data is contained in ICU's data library that contains
1435 the entry point defined by U_ICUDATA_ENTRY_POINT.
1436
1437 There may also be some platforms where environment variables
1438 are not allowed.
1439 */
1440# if !defined(ICU_NO_USER_DATA_OVERRIDE) && !UCONFIG_NO_FILE_IO
1441 /* First try to get the environment variable */
1442# if U_PLATFORM_HAS_WINUWP_API == 0 // Windows UWP does not support getenv
1443 path=getenv("ICU_DATA");
1444# endif
1445# endif
1446
1447 /* ICU_DATA_DIR may be set as a compile option.
1448 * U_ICU_DATA_DEFAULT_DIR is provided and is set by ICU at compile time
1449 * and is used only when data is built in archive mode eliminating the need
1450 * for ICU_DATA_DIR to be set. U_ICU_DATA_DEFAULT_DIR is set to the installation
1451 * directory of the data dat file. Users should use ICU_DATA_DIR if they want to
1452 * set their own path.
1453 */
1454#if defined(ICU_DATA_DIR) || defined(U_ICU_DATA_DEFAULT_DIR)
1455 if(path==nullptr || *path==0) {
1456# if defined(ICU_DATA_DIR_PREFIX_ENV_VAR)
1457 const char *prefix = getenv(ICU_DATA_DIR_PREFIX_ENV_VAR);
1458# endif
1459# ifdef ICU_DATA_DIR
1460 path=ICU_DATA_DIR;
1461# else
1462 path=U_ICU_DATA_DEFAULT_DIR;
1463# endif
1464# if defined(ICU_DATA_DIR_PREFIX_ENV_VAR)
1465 if (prefix != nullptr) {
1466 snprintf(datadir_path_buffer, sizeof(datadir_path_buffer), "%s%s", prefix, path);
1467 path=datadir_path_buffer;
1468 }
1469# endif
1470 }
1471#endif
1472
1473#if defined(ICU_DATA_DIR_WINDOWS)
1474 char datadir_path_buffer[MAX_PATH];
1475 if (getIcuDataDirectoryUnderWindowsDirectory(datadir_path_buffer, UPRV_LENGTHOF(datadir_path_buffer))) {
1476 path = datadir_path_buffer;
1477 }
1478#endif
1479
1480 if(path==nullptr) {
1481 /* It looks really bad, set it to something. */
1482 path = "";
1483 }
1484
1485 u_setDataDirectory(path);
1486 return;
1487}
1488
1489U_CAPI const char * U_EXPORT2
1490u_getDataDirectory() {
1491 umtx_initOnce(gDataDirInitOnce, &dataDirectoryInitFn);
1492 return gDataDirectory;
1493}
1494
1495static void setTimeZoneFilesDir(const char *path, UErrorCode &status) {
1496 if (U_FAILURE(status)) {
1497 return;
1498 }
1499 gTimeZoneFilesDirectory->clear();
1500 gTimeZoneFilesDirectory->append(path, status);
1501#if (U_FILE_SEP_CHAR != U_FILE_ALT_SEP_CHAR)
1502 char *p = gTimeZoneFilesDirectory->data();
1503 while ((p = uprv_strchr(p, U_FILE_ALT_SEP_CHAR)) != nullptr) {
1504 *p = U_FILE_SEP_CHAR;
1505 }
1506#endif
1507}
1508
1509#define TO_STRING(x) TO_STRING_2(x)
1510#define TO_STRING_2(x) #x
1511
1512static void U_CALLCONV TimeZoneDataDirInitFn(UErrorCode &status) {
1513 U_ASSERT(gTimeZoneFilesDirectory == nullptr);
1514 ucln_common_registerCleanup(UCLN_COMMON_PUTIL, putil_cleanup);
1515 gTimeZoneFilesDirectory = new CharString();
1516 if (gTimeZoneFilesDirectory == nullptr) {
1517 status = U_MEMORY_ALLOCATION_ERROR;
1518 return;
1519 }
1520
1521 const char *dir = "";
1522
1523#if defined(ICU_TIMEZONE_FILES_DIR_PREFIX_ENV_VAR)
1524 char timezonefilesdir_path_buffer[PATH_MAX];
1525 const char *prefix = getenv(ICU_TIMEZONE_FILES_DIR_PREFIX_ENV_VAR);
1526#endif
1527
1528#if U_PLATFORM_HAS_WINUWP_API == 1
1529// The UWP version does not support the environment variable setting.
1530
1531# if defined(ICU_DATA_DIR_WINDOWS)
1532 // When using the Windows system data, we can possibly pick up time zone data from the Windows directory.
1533 char datadir_path_buffer[MAX_PATH];
1534 if (getIcuDataDirectoryUnderWindowsDirectory(datadir_path_buffer, UPRV_LENGTHOF(datadir_path_buffer))) {
1535 dir = datadir_path_buffer;
1536 }
1537# endif
1538
1539#else
1540 dir = getenv("ICU_TIMEZONE_FILES_DIR");
1541#endif // U_PLATFORM_HAS_WINUWP_API
1542
1543#if defined(U_TIMEZONE_FILES_DIR)
1544 if (dir == nullptr) {
1545 // Build time configuration setting.
1546 dir = TO_STRING(U_TIMEZONE_FILES_DIR);
1547 }
1548#endif
1549
1550 if (dir == nullptr) {
1551 dir = "";
1552 }
1553
1554#if defined(ICU_TIMEZONE_FILES_DIR_PREFIX_ENV_VAR)
1555 if (prefix != nullptr) {
1556 snprintf(timezonefilesdir_path_buffer, sizeof(timezonefilesdir_path_buffer), "%s%s", prefix, dir);
1557 dir = timezonefilesdir_path_buffer;
1558 }
1559#endif
1560
1561 setTimeZoneFilesDir(dir, status);
1562}
1563
1564
1565U_CAPI const char * U_EXPORT2
1566u_getTimeZoneFilesDirectory(UErrorCode *status) {
1567 umtx_initOnce(gTimeZoneFilesInitOnce, &TimeZoneDataDirInitFn, *status);
1568 return U_SUCCESS(*status) ? gTimeZoneFilesDirectory->data() : "";
1569}
1570
1571U_CAPI void U_EXPORT2
1572u_setTimeZoneFilesDirectory(const char *path, UErrorCode *status) {
1573 umtx_initOnce(gTimeZoneFilesInitOnce, &TimeZoneDataDirInitFn, *status);
1574 setTimeZoneFilesDir(path, *status);
1575
1576 // Note: this function does some extra churn, first setting based on the
1577 // environment, then immediately replacing with the value passed in.
1578 // The logic is simpler that way, and performance shouldn't be an issue.
1579}
1580
1581
1582#if U_POSIX_LOCALE
1583/* A helper function used by uprv_getPOSIXIDForDefaultLocale and
1584 * uprv_getPOSIXIDForDefaultCodepage. Returns the posix locale id for
1585 * LC_CTYPE and LC_MESSAGES. It doesn't support other locale categories.
1586 */
1587static const char *uprv_getPOSIXIDForCategory(int category)
1588{
1589 const char* posixID = nullptr;
1590 if (category == LC_MESSAGES || category == LC_CTYPE) {
1591 /*
1592 * On Solaris two different calls to setlocale can result in
1593 * different values. Only get this value once.
1594 *
1595 * We must check this first because an application can set this.
1596 *
1597 * LC_ALL can't be used because it's platform dependent. The LANG
1598 * environment variable seems to affect LC_CTYPE variable by default.
1599 * Here is what setlocale(LC_ALL, nullptr) can return.
1600 * HPUX can return 'C C C C C C C'
1601 * Solaris can return /en_US/C/C/C/C/C on the second try.
1602 * Linux can return LC_CTYPE=C;LC_NUMERIC=C;...
1603 *
1604 * The default codepage detection also needs to use LC_CTYPE.
1605 *
1606 * Do not call setlocale(LC_*, "")! Using an empty string instead
1607 * of nullptr, will modify the libc behavior.
1608 */
1609 posixID = setlocale(category, nullptr);
1610 if ((posixID == 0)
1611 || (uprv_strcmp("C", posixID) == 0)
1612 || (uprv_strcmp("POSIX", posixID) == 0))
1613 {
1614 /* Maybe we got some garbage. Try something more reasonable */
1615 posixID = getenv("LC_ALL");
1616 /* Solaris speaks POSIX - See IEEE Std 1003.1-2008
1617 * This is needed to properly handle empty env. variables
1618 */
1619#if U_PLATFORM == U_PF_SOLARIS
1620 if ((posixID == 0) || (posixID[0] == '\0')) {
1621 posixID = getenv(category == LC_MESSAGES ? "LC_MESSAGES" : "LC_CTYPE");
1622 if ((posixID == 0) || (posixID[0] == '\0')) {
1623#else
1624 if (posixID == 0) {
1625 posixID = getenv(category == LC_MESSAGES ? "LC_MESSAGES" : "LC_CTYPE");
1626 if (posixID == 0) {
1627#endif
1628 posixID = getenv("LANG");
1629 }
1630 }
1631 }
1632 }
1633 if ((posixID==0)
1634 || (uprv_strcmp("C", posixID) == 0)
1635 || (uprv_strcmp("POSIX", posixID) == 0))
1636 {
1637 /* Nothing worked. Give it a nice POSIX default value. */
1638 posixID = "en_US_POSIX";
1639 // Note: this test will not catch 'C.UTF-8',
1640 // that will be handled in uprv_getDefaultLocaleID().
1641 // Leave this mapping here for the uprv_getPOSIXIDForDefaultCodepage()
1642 // caller which expects to see "en_US_POSIX" in many branches.
1643 }
1644 return posixID;
1645}
1646
1647/* Return just the POSIX id for the default locale, whatever happens to be in
1648 * it. It gets the value from LC_MESSAGES and indirectly from LC_ALL and LANG.
1649 */
1650static const char *uprv_getPOSIXIDForDefaultLocale()
1651{
1652 static const char* posixID = nullptr;
1653 if (posixID == 0) {
1654 posixID = uprv_getPOSIXIDForCategory(LC_MESSAGES);
1655 }
1656 return posixID;
1657}
1658
1659#if !U_CHARSET_IS_UTF8
1660/* Return just the POSIX id for the default codepage, whatever happens to be in
1661 * it. It gets the value from LC_CTYPE and indirectly from LC_ALL and LANG.
1662 */
1663static const char *uprv_getPOSIXIDForDefaultCodepage()
1664{
1665 static const char* posixID = nullptr;
1666 if (posixID == 0) {
1667 posixID = uprv_getPOSIXIDForCategory(LC_CTYPE);
1668 }
1669 return posixID;
1670}
1671#endif
1672#endif
1673
1674/* NOTE: The caller should handle thread safety */
1675U_CAPI const char* U_EXPORT2
1676uprv_getDefaultLocaleID()
1677{
1678#if U_POSIX_LOCALE
1679/*
1680 Note that: (a '!' means the ID is improper somehow)
1681 LC_ALL ----> default_loc codepage
1682--------------------------------------------------------
1683 ab.CD ab CD
1684 ab@CD ab__CD -
1685 ab@CD.EF ab__CD EF
1686
1687 ab_CD.EF@GH ab_CD_GH EF
1688
1689Some 'improper' ways to do the same as above:
1690 ! ab_CD@GH.EF ab_CD_GH EF
1691 ! ab_CD.EF@GH.IJ ab_CD_GH EF
1692 ! ab_CD@ZZ.EF@GH.IJ ab_CD_GH EF
1693
1694 _CD@GH _CD_GH -
1695 _CD.EF@GH _CD_GH EF
1696
1697The variant cannot have dots in it.
1698The 'rightmost' variant (@xxx) wins.
1699The leftmost codepage (.xxx) wins.
1700*/
1701 const char* posixID = uprv_getPOSIXIDForDefaultLocale();
1702
1703 /* Format: (no spaces)
1704 ll [ _CC ] [ . MM ] [ @ VV]
1705
1706 l = lang, C = ctry, M = charmap, V = variant
1707 */
1708
1709 if (gCorrectedPOSIXLocale != nullptr) {
1710 return gCorrectedPOSIXLocale;
1711 }
1712
1713 // Copy the ID into owned memory.
1714 // Over-allocate in case we replace "C" with "en_US_POSIX" (+10), + null termination
1715 char *correctedPOSIXLocale = static_cast<char *>(uprv_malloc(uprv_strlen(posixID) + 10 + 1));
1716 if (correctedPOSIXLocale == nullptr) {
1717 return nullptr;
1718 }
1719 uprv_strcpy(correctedPOSIXLocale, posixID);
1720
1721 char *limit;
1722 if ((limit = uprv_strchr(correctedPOSIXLocale, '.')) != nullptr) {
1723 *limit = 0;
1724 }
1725 if ((limit = uprv_strchr(correctedPOSIXLocale, '@')) != nullptr) {
1726 *limit = 0;
1727 }
1728
1729 if ((uprv_strcmp("C", correctedPOSIXLocale) == 0) // no @ variant
1730 || (uprv_strcmp("POSIX", correctedPOSIXLocale) == 0)) {
1731 // Raw input was C.* or POSIX.*, Give it a nice POSIX default value.
1732 // (The "C"/"POSIX" case is handled in uprv_getPOSIXIDForCategory())
1733 uprv_strcpy(correctedPOSIXLocale, "en_US_POSIX");
1734 }
1735
1736 /* Note that we scan the *uncorrected* ID. */
1737 const char *p;
1738 if ((p = uprv_strrchr(posixID, '@')) != nullptr) {
1739 p++;
1740
1741 /* Take care of any special cases here.. */
1742 if (!uprv_strcmp(p, "nynorsk")) {
1743 p = "NY";
1744 /* Don't worry about no__NY. In practice, it won't appear. */
1745 }
1746
1747 if (uprv_strchr(correctedPOSIXLocale,'_') == nullptr) {
1748 uprv_strcat(correctedPOSIXLocale, "__"); /* aa@b -> aa__b (note this can make the new locale 1 char longer) */
1749 }
1750 else {
1751 uprv_strcat(correctedPOSIXLocale, "_"); /* aa_CC@b -> aa_CC_b */
1752 }
1753
1754 const char *q;
1755 if ((q = uprv_strchr(p, '.')) != nullptr) {
1756 /* How big will the resulting string be? */
1757 int32_t len = (int32_t)(uprv_strlen(correctedPOSIXLocale) + (q-p));
1758 uprv_strncat(correctedPOSIXLocale, p, q-p); // do not include charset
1759 correctedPOSIXLocale[len] = 0;
1760 }
1761 else {
1762 /* Anything following the @ sign */
1763 uprv_strcat(correctedPOSIXLocale, p);
1764 }
1765
1766 /* Should there be a map from 'no@nynorsk' -> no_NO_NY here?
1767 * How about 'russian' -> 'ru'?
1768 * Many of the other locales using ISO codes will be handled by the
1769 * canonicalization functions in uloc_getDefault.
1770 */
1771 }
1772
1773 if (gCorrectedPOSIXLocale == nullptr) {
1774 gCorrectedPOSIXLocale = correctedPOSIXLocale;
1775 gCorrectedPOSIXLocaleHeapAllocated = true;
1776 ucln_common_registerCleanup(UCLN_COMMON_PUTIL, putil_cleanup);
1777 correctedPOSIXLocale = nullptr;
1778 }
1779 posixID = gCorrectedPOSIXLocale;
1780
1781 if (correctedPOSIXLocale != nullptr) { /* Was already set - clean up. */
1782 uprv_free(correctedPOSIXLocale);
1783 }
1784
1785 return posixID;
1786
1787#elif U_PLATFORM_USES_ONLY_WIN32_API
1788#define POSIX_LOCALE_CAPACITY 64
1789 UErrorCode status = U_ZERO_ERROR;
1790 char *correctedPOSIXLocale = nullptr;
1791
1792 // If we have already figured this out just use the cached value
1793 if (gCorrectedPOSIXLocale != nullptr) {
1794 return gCorrectedPOSIXLocale;
1795 }
1796
1797 // No cached value, need to determine the current value
1798 static WCHAR windowsLocale[LOCALE_NAME_MAX_LENGTH] = {};
1799 int length = GetLocaleInfoEx(LOCALE_NAME_USER_DEFAULT, LOCALE_SNAME, windowsLocale, LOCALE_NAME_MAX_LENGTH);
1800
1801 // Now we should have a Windows locale name that needs converted to the POSIX style.
1802 if (length > 0) // If length is 0, then the GetLocaleInfoEx failed.
1803 {
1804 // First we need to go from UTF-16 to char (and also convert from _ to - while we're at it.)
1805 char modifiedWindowsLocale[LOCALE_NAME_MAX_LENGTH] = {};
1806
1807 int32_t i;
1808 for (i = 0; i < UPRV_LENGTHOF(modifiedWindowsLocale); i++)
1809 {
1810 if (windowsLocale[i] == '_')
1811 {
1812 modifiedWindowsLocale[i] = '-';
1813 }
1814 else
1815 {
1816 modifiedWindowsLocale[i] = static_cast<char>(windowsLocale[i]);
1817 }
1818
1819 if (modifiedWindowsLocale[i] == '\0')
1820 {
1821 break;
1822 }
1823 }
1824
1825 if (i >= UPRV_LENGTHOF(modifiedWindowsLocale))
1826 {
1827 // Ran out of room, can't really happen, maybe we'll be lucky about a matching
1828 // locale when tags are dropped
1829 modifiedWindowsLocale[UPRV_LENGTHOF(modifiedWindowsLocale) - 1] = '\0';
1830 }
1831
1832 // Now normalize the resulting name
1833 correctedPOSIXLocale = static_cast<char *>(uprv_malloc(POSIX_LOCALE_CAPACITY + 1));
1834 /* TODO: Should we just exit on memory allocation failure? */
1835 if (correctedPOSIXLocale)
1836 {
1837 int32_t posixLen = uloc_canonicalize(modifiedWindowsLocale, correctedPOSIXLocale, POSIX_LOCALE_CAPACITY, &status);
1838 if (U_SUCCESS(status))
1839 {
1840 *(correctedPOSIXLocale + posixLen) = 0;
1841 gCorrectedPOSIXLocale = correctedPOSIXLocale;
1842 gCorrectedPOSIXLocaleHeapAllocated = true;
1843 ucln_common_registerCleanup(UCLN_COMMON_PUTIL, putil_cleanup);
1844 }
1845 else
1846 {
1847 uprv_free(correctedPOSIXLocale);
1848 }
1849 }
1850 }
1851
1852 // If unable to find a locale we can agree upon, use en-US by default
1853 if (gCorrectedPOSIXLocale == nullptr) {
1854 gCorrectedPOSIXLocale = "en_US";
1855 }
1856 return gCorrectedPOSIXLocale;
1857
1858#elif U_PLATFORM == U_PF_OS400
1859 /* locales are process scoped and are by definition thread safe */
1860 static char correctedLocale[64];
1861 const char *localeID = getenv("LC_ALL");
1862 char *p;
1863
1864 if (localeID == nullptr)
1865 localeID = getenv("LANG");
1866 if (localeID == nullptr)
1867 localeID = setlocale(LC_ALL, nullptr);
1868 /* Make sure we have something... */
1869 if (localeID == nullptr)
1870 return "en_US_POSIX";
1871
1872 /* Extract the locale name from the path. */
1873 if((p = uprv_strrchr(localeID, '/')) != nullptr)
1874 {
1875 /* Increment p to start of locale name. */
1876 p++;
1877 localeID = p;
1878 }
1879
1880 /* Copy to work location. */
1881 uprv_strcpy(correctedLocale, localeID);
1882
1883 /* Strip off the '.locale' extension. */
1884 if((p = uprv_strchr(correctedLocale, '.')) != nullptr) {
1885 *p = 0;
1886 }
1887
1888 /* Upper case the locale name. */
1889 T_CString_toUpperCase(correctedLocale);
1890
1891 /* See if we are using the POSIX locale. Any of the
1892 * following are equivalent and use the same QLGPGCMA
1893 * (POSIX) locale.
1894 * QLGPGCMA2 means UCS2
1895 * QLGPGCMA_4 means UTF-32
1896 * QLGPGCMA_8 means UTF-8
1897 */
1898 if ((uprv_strcmp("C", correctedLocale) == 0) ||
1899 (uprv_strcmp("POSIX", correctedLocale) == 0) ||
1900 (uprv_strncmp("QLGPGCMA", correctedLocale, 8) == 0))
1901 {
1902 uprv_strcpy(correctedLocale, "en_US_POSIX");
1903 }
1904 else
1905 {
1906 int16_t LocaleLen;
1907
1908 /* Lower case the lang portion. */
1909 for(p = correctedLocale; *p != 0 && *p != '_'; p++)
1910 {
1911 *p = uprv_tolower(*p);
1912 }
1913
1914 /* Adjust for Euro. After '_E' add 'URO'. */
1915 LocaleLen = uprv_strlen(correctedLocale);
1916 if (correctedLocale[LocaleLen - 2] == '_' &&
1917 correctedLocale[LocaleLen - 1] == 'E')
1918 {
1919 uprv_strcat(correctedLocale, "URO");
1920 }
1921
1922 /* If using Lotus-based locale then convert to
1923 * equivalent non Lotus.
1924 */
1925 else if (correctedLocale[LocaleLen - 2] == '_' &&
1926 correctedLocale[LocaleLen - 1] == 'L')
1927 {
1928 correctedLocale[LocaleLen - 2] = 0;
1929 }
1930
1931 /* There are separate simplified and traditional
1932 * locales called zh_HK_S and zh_HK_T.
1933 */
1934 else if (uprv_strncmp(correctedLocale, "zh_HK", 5) == 0)
1935 {
1936 uprv_strcpy(correctedLocale, "zh_HK");
1937 }
1938
1939 /* A special zh_CN_GBK locale...
1940 */
1941 else if (uprv_strcmp(correctedLocale, "zh_CN_GBK") == 0)
1942 {
1943 uprv_strcpy(correctedLocale, "zh_CN");
1944 }
1945
1946 }
1947
1948 return correctedLocale;
1949#endif
1950
1951}
1952
1953#if !U_CHARSET_IS_UTF8
1954#if U_POSIX_LOCALE
1955/*
1956Due to various platform differences, one platform may specify a charset,
1957when they really mean a different charset. Remap the names so that they are
1958compatible with ICU. Only conflicting/ambiguous aliases should be resolved
1959here. Before adding anything to this function, please consider adding unique
1960names to the ICU alias table in the data directory.
1961*/
1962static const char*
1963remapPlatformDependentCodepage(const char *locale, const char *name) {
1964 if (locale != nullptr && *locale == 0) {
1965 /* Make sure that an empty locale is handled the same way. */
1966 locale = nullptr;
1967 }
1968 if (name == nullptr) {
1969 return nullptr;
1970 }
1971#if U_PLATFORM == U_PF_AIX
1972 if (uprv_strcmp(name, "IBM-943") == 0) {
1973 /* Use the ASCII compatible ibm-943 */
1974 name = "Shift-JIS";
1975 }
1976 else if (uprv_strcmp(name, "IBM-1252") == 0) {
1977 /* Use the windows-1252 that contains the Euro */
1978 name = "IBM-5348";
1979 }
1980#elif U_PLATFORM == U_PF_SOLARIS
1981 if (locale != nullptr && uprv_strcmp(name, "EUC") == 0) {
1982 /* Solaris underspecifies the "EUC" name. */
1983 if (uprv_strcmp(locale, "zh_CN") == 0) {
1984 name = "EUC-CN";
1985 }
1986 else if (uprv_strcmp(locale, "zh_TW") == 0) {
1987 name = "EUC-TW";
1988 }
1989 else if (uprv_strcmp(locale, "ko_KR") == 0) {
1990 name = "EUC-KR";
1991 }
1992 }
1993 else if (uprv_strcmp(name, "eucJP") == 0) {
1994 /*
1995 ibm-954 is the best match.
1996 ibm-33722 is the default for eucJP (similar to Windows).
1997 */
1998 name = "eucjis";
1999 }
2000 else if (uprv_strcmp(name, "646") == 0) {
2001 /*
2002 * The default codepage given by Solaris is 646 but the C library routines treat it as if it was
2003 * ISO-8859-1 instead of US-ASCII(646).
2004 */
2005 name = "ISO-8859-1";
2006 }
2007#elif U_PLATFORM_IS_DARWIN_BASED
2008 if (locale == nullptr && *name == 0) {
2009 /*
2010 No locale was specified, and an empty name was passed in.
2011 This usually indicates that nl_langinfo didn't return valid information.
2012 Mac OS X uses UTF-8 by default (especially the locale data and console).
2013 */
2014 name = "UTF-8";
2015 }
2016 else if (uprv_strcmp(name, "CP949") == 0) {
2017 /* Remap CP949 to a similar codepage to avoid issues with backslash and won symbol. */
2018 name = "EUC-KR";
2019 }
2020 else if (locale != nullptr && uprv_strcmp(locale, "en_US_POSIX") != 0 && uprv_strcmp(name, "US-ASCII") == 0) {
2021 /*
2022 * For non C/POSIX locale, default the code page to UTF-8 instead of US-ASCII.
2023 */
2024 name = "UTF-8";
2025 }
2026#elif U_PLATFORM == U_PF_BSD
2027 if (uprv_strcmp(name, "CP949") == 0) {
2028 /* Remap CP949 to a similar codepage to avoid issues with backslash and won symbol. */
2029 name = "EUC-KR";
2030 }
2031#elif U_PLATFORM == U_PF_HPUX
2032 if (locale != nullptr && uprv_strcmp(locale, "zh_HK") == 0 && uprv_strcmp(name, "big5") == 0) {
2033 /* HP decided to extend big5 as hkbig5 even though it's not compatible :-( */
2034 /* zh_TW.big5 is not the same charset as zh_HK.big5! */
2035 name = "hkbig5";
2036 }
2037 else if (uprv_strcmp(name, "eucJP") == 0) {
2038 /*
2039 ibm-1350 is the best match, but unavailable.
2040 ibm-954 is mostly a superset of ibm-1350.
2041 ibm-33722 is the default for eucJP (similar to Windows).
2042 */
2043 name = "eucjis";
2044 }
2045#elif U_PLATFORM == U_PF_LINUX
2046 if (locale != nullptr && uprv_strcmp(name, "euc") == 0) {
2047 /* Linux underspecifies the "EUC" name. */
2048 if (uprv_strcmp(locale, "korean") == 0) {
2049 name = "EUC-KR";
2050 }
2051 else if (uprv_strcmp(locale, "japanese") == 0) {
2052 /* See comment below about eucJP */
2053 name = "eucjis";
2054 }
2055 }
2056 else if (uprv_strcmp(name, "eucjp") == 0) {
2057 /*
2058 ibm-1350 is the best match, but unavailable.
2059 ibm-954 is mostly a superset of ibm-1350.
2060 ibm-33722 is the default for eucJP (similar to Windows).
2061 */
2062 name = "eucjis";
2063 }
2064 else if (locale != nullptr && uprv_strcmp(locale, "en_US_POSIX") != 0 &&
2065 (uprv_strcmp(name, "ANSI_X3.4-1968") == 0 || uprv_strcmp(name, "US-ASCII") == 0)) {
2066 /*
2067 * For non C/POSIX locale, default the code page to UTF-8 instead of US-ASCII.
2068 */
2069 name = "UTF-8";
2070 }
2071 /*
2072 * Linux returns ANSI_X3.4-1968 for C/POSIX, but the call site takes care of
2073 * it by falling back to 'US-ASCII' when nullptr is returned from this
2074 * function. So, we don't have to worry about it here.
2075 */
2076#endif
2077 /* return nullptr when "" is passed in */
2078 if (*name == 0) {
2079 name = nullptr;
2080 }
2081 return name;
2082}
2083
2084static const char*
2085getCodepageFromPOSIXID(const char *localeName, char * buffer, int32_t buffCapacity)
2086{
2087 char localeBuf[100];
2088 const char *name = nullptr;
2089 char *variant = nullptr;
2090
2091 if (localeName != nullptr && (name = (uprv_strchr(localeName, '.'))) != nullptr) {
2092 size_t localeCapacity = uprv_min(sizeof(localeBuf), (name-localeName)+1);
2093 uprv_strncpy(localeBuf, localeName, localeCapacity);
2094 localeBuf[localeCapacity-1] = 0; /* ensure NUL termination */
2095 name = uprv_strncpy(buffer, name+1, buffCapacity);
2096 buffer[buffCapacity-1] = 0; /* ensure NUL termination */
2097 if ((variant = const_cast<char *>(uprv_strchr(name, '@'))) != nullptr) {
2098 *variant = 0;
2099 }
2100 name = remapPlatformDependentCodepage(localeBuf, name);
2101 }
2102 return name;
2103}
2104#endif
2105
2106static const char*
2107int_getDefaultCodepage()
2108{
2109#if U_PLATFORM == U_PF_OS400
2110 uint32_t ccsid = 37; /* Default to ibm-37 */
2111 static char codepage[64];
2112 Qwc_JOBI0400_t jobinfo;
2113 Qus_EC_t error = { sizeof(Qus_EC_t) }; /* SPI error code */
2114
2115 EPT_CALL(QUSRJOBI)(&jobinfo, sizeof(jobinfo), "JOBI0400",
2116 "* ", " ", &error);
2117
2118 if (error.Bytes_Available == 0) {
2119 if (jobinfo.Coded_Char_Set_ID != 0xFFFF) {
2120 ccsid = (uint32_t)jobinfo.Coded_Char_Set_ID;
2121 }
2122 else if (jobinfo.Default_Coded_Char_Set_Id != 0xFFFF) {
2123 ccsid = (uint32_t)jobinfo.Default_Coded_Char_Set_Id;
2124 }
2125 /* else use the default */
2126 }
2127 snprintf(codepage, sizeof(codepage), "ibm-%d", ccsid);
2128 return codepage;
2129
2130#elif U_PLATFORM == U_PF_OS390
2131 static char codepage[64];
2132
2133 strncpy(codepage, nl_langinfo(CODESET),63-strlen(UCNV_SWAP_LFNL_OPTION_STRING));
2134 strcat(codepage,UCNV_SWAP_LFNL_OPTION_STRING);
2135 codepage[63] = 0; /* NUL terminate */
2136
2137 return codepage;
2138
2139#elif U_PLATFORM_USES_ONLY_WIN32_API
2140 static char codepage[64];
2141 DWORD codepageNumber = 0;
2142
2143#if U_PLATFORM_HAS_WINUWP_API == 1
2144 // UWP doesn't have a direct API to get the default ACP as Microsoft would rather
2145 // have folks use Unicode than a "system" code page, however this is the same
2146 // codepage as the system default locale codepage. (FWIW, the system locale is
2147 // ONLY used for codepage, it should never be used for anything else)
2148 GetLocaleInfoEx(LOCALE_NAME_SYSTEM_DEFAULT, LOCALE_IDEFAULTANSICODEPAGE | LOCALE_RETURN_NUMBER,
2149 (LPWSTR)&codepageNumber, sizeof(codepageNumber) / sizeof(WCHAR));
2150#else
2151 // Win32 apps can call GetACP
2152 codepageNumber = GetACP();
2153#endif
2154 // Special case for UTF-8
2155 if (codepageNumber == 65001)
2156 {
2157 return "UTF-8";
2158 }
2159 // Windows codepages can look like windows-1252, so format the found number
2160 // the numbers are eclectic, however all valid system code pages, besides UTF-8
2161 // are between 3 and 19999
2162 if (codepageNumber > 0 && codepageNumber < 20000)
2163 {
2164 snprintf(codepage, sizeof(codepage), "windows-%ld", codepageNumber);
2165 return codepage;
2166 }
2167 // If the codepage number call failed then return UTF-8
2168 return "UTF-8";
2169
2170#elif U_POSIX_LOCALE
2171 static char codesetName[100];
2172 const char *localeName = nullptr;
2173 const char *name = nullptr;
2174
2175 localeName = uprv_getPOSIXIDForDefaultCodepage();
2176 uprv_memset(codesetName, 0, sizeof(codesetName));
2177 /* On Solaris nl_langinfo returns C locale values unless setlocale
2178 * was called earlier.
2179 */
2180#if (U_HAVE_NL_LANGINFO_CODESET && U_PLATFORM != U_PF_SOLARIS)
2181 /* When available, check nl_langinfo first because it usually gives more
2182 useful names. It depends on LC_CTYPE.
2183 nl_langinfo may use the same buffer as setlocale. */
2184 {
2185 const char *codeset = nl_langinfo(U_NL_LANGINFO_CODESET);
2186#if U_PLATFORM_IS_DARWIN_BASED || U_PLATFORM_IS_LINUX_BASED
2187 /*
2188 * On Linux and MacOSX, ensure that default codepage for non C/POSIX locale is UTF-8
2189 * instead of ASCII.
2190 */
2191 if (uprv_strcmp(localeName, "en_US_POSIX") != 0) {
2192 codeset = remapPlatformDependentCodepage(localeName, codeset);
2193 } else
2194#endif
2195 {
2196 codeset = remapPlatformDependentCodepage(nullptr, codeset);
2197 }
2198
2199 if (codeset != nullptr) {
2200 uprv_strncpy(codesetName, codeset, sizeof(codesetName));
2201 codesetName[sizeof(codesetName)-1] = 0;
2202 return codesetName;
2203 }
2204 }
2205#endif
2206
2207 /* Use setlocale in a nice way, and then check some environment variables.
2208 Maybe the application used setlocale already.
2209 */
2210 uprv_memset(codesetName, 0, sizeof(codesetName));
2211 name = getCodepageFromPOSIXID(localeName, codesetName, sizeof(codesetName));
2212 if (name) {
2213 /* if we can find the codeset name from setlocale, return that. */
2214 return name;
2215 }
2216
2217 if (*codesetName == 0)
2218 {
2219 /* Everything failed. Return US ASCII (ISO 646). */
2220 (void)uprv_strcpy(codesetName, "US-ASCII");
2221 }
2222 return codesetName;
2223#else
2224 return "US-ASCII";
2225#endif
2226}
2227
2228
2229U_CAPI const char* U_EXPORT2
2230uprv_getDefaultCodepage()
2231{
2232 static char const *name = nullptr;
2233 umtx_lock(nullptr);
2234 if (name == nullptr) {
2235 name = int_getDefaultCodepage();
2236 }
2237 umtx_unlock(nullptr);
2238 return name;
2239}
2240#endif /* !U_CHARSET_IS_UTF8 */
2241
2242
2243/* end of platform-specific implementation -------------- */
2244
2245/* version handling --------------------------------------------------------- */
2246
2247U_CAPI void U_EXPORT2
2248u_versionFromString(UVersionInfo versionArray, const char *versionString) {
2249 char *end;
2250 uint16_t part=0;
2251
2252 if(versionArray==nullptr) {
2253 return;
2254 }
2255
2256 if(versionString!=nullptr) {
2257 for(;;) {
2258 versionArray[part]=(uint8_t)uprv_strtoul(versionString, &end, 10);
2259 if(end==versionString || ++part==U_MAX_VERSION_LENGTH || *end!=U_VERSION_DELIMITER) {
2260 break;
2261 }
2262 versionString=end+1;
2263 }
2264 }
2265
2266 while(part<U_MAX_VERSION_LENGTH) {
2267 versionArray[part++]=0;
2268 }
2269}
2270
2271U_CAPI void U_EXPORT2
2272u_versionFromUString(UVersionInfo versionArray, const char16_t *versionString) {
2273 if(versionArray!=nullptr && versionString!=nullptr) {
2274 char versionChars[U_MAX_VERSION_STRING_LENGTH+1];
2275 int32_t len = u_strlen(versionString);
2276 if(len>U_MAX_VERSION_STRING_LENGTH) {
2277 len = U_MAX_VERSION_STRING_LENGTH;
2278 }
2279 u_UCharsToChars(versionString, versionChars, len);
2280 versionChars[len]=0;
2281 u_versionFromString(versionArray, versionChars);
2282 }
2283}
2284
2285U_CAPI void U_EXPORT2
2286u_versionToString(const UVersionInfo versionArray, char *versionString) {
2287 uint16_t count, part;
2288 uint8_t field;
2289
2290 if(versionString==nullptr) {
2291 return;
2292 }
2293
2294 if(versionArray==nullptr) {
2295 versionString[0]=0;
2296 return;
2297 }
2298
2299 /* count how many fields need to be written */
2300 for(count=4; count>0 && versionArray[count-1]==0; --count) {
2301 }
2302
2303 if(count <= 1) {
2304 count = 2;
2305 }
2306
2307 /* write the first part */
2308 /* write the decimal field value */
2309 field=versionArray[0];
2310 if(field>=100) {
2311 *versionString++=(char)('0'+field/100);
2312 field%=100;
2313 }
2314 if(field>=10) {
2315 *versionString++=(char)('0'+field/10);
2316 field%=10;
2317 }
2318 *versionString++=(char)('0'+field);
2319
2320 /* write the following parts */
2321 for(part=1; part<count; ++part) {
2322 /* write a dot first */
2323 *versionString++=U_VERSION_DELIMITER;
2324
2325 /* write the decimal field value */
2326 field=versionArray[part];
2327 if(field>=100) {
2328 *versionString++=(char)('0'+field/100);
2329 field%=100;
2330 }
2331 if(field>=10) {
2332 *versionString++=(char)('0'+field/10);
2333 field%=10;
2334 }
2335 *versionString++=(char)('0'+field);
2336 }
2337
2338 /* NUL-terminate */
2339 *versionString=0;
2340}
2341
2342U_CAPI void U_EXPORT2
2343u_getVersion(UVersionInfo versionArray) {
2344 (void)copyright; // Suppress unused variable warning from clang.
2345 u_versionFromString(versionArray, U_ICU_VERSION);
2346}
2347
2348/**
2349 * icucfg.h dependent code
2350 */
2351
2352#if U_ENABLE_DYLOAD && HAVE_DLOPEN && !U_PLATFORM_USES_ONLY_WIN32_API
2353
2354#if HAVE_DLFCN_H
2355#ifdef __MVS__
2356#ifndef __SUSV3
2357#define __SUSV3 1
2358#endif
2359#endif
2360#include <dlfcn.h>
2361#endif /* HAVE_DLFCN_H */
2362
2363U_CAPI void * U_EXPORT2
2364uprv_dl_open(const char *libName, UErrorCode *status) {
2365 void *ret = nullptr;
2366 if(U_FAILURE(*status)) return ret;
2367 ret = dlopen(libName, RTLD_NOW|RTLD_GLOBAL);
2368 if(ret==nullptr) {
2369#ifdef U_TRACE_DYLOAD
2370 printf("dlerror on dlopen(%s): %s\n", libName, dlerror());
2371#endif
2372 *status = U_MISSING_RESOURCE_ERROR;
2373 }
2374 return ret;
2375}
2376
2377U_CAPI void U_EXPORT2
2378uprv_dl_close(void *lib, UErrorCode *status) {
2379 if(U_FAILURE(*status)) return;
2380 dlclose(lib);
2381}
2382
2383U_CAPI UVoidFunction* U_EXPORT2
2384uprv_dlsym_func(void *lib, const char* sym, UErrorCode *status) {
2385 union {
2386 UVoidFunction *fp;
2387 void *vp;
2388 } uret;
2389 uret.fp = nullptr;
2390 if(U_FAILURE(*status)) return uret.fp;
2391 uret.vp = dlsym(lib, sym);
2392 if(uret.vp == nullptr) {
2393#ifdef U_TRACE_DYLOAD
2394 printf("dlerror on dlsym(%p,%s): %s\n", lib,sym, dlerror());
2395#endif
2396 *status = U_MISSING_RESOURCE_ERROR;
2397 }
2398 return uret.fp;
2399}
2400
2401#elif U_ENABLE_DYLOAD && U_PLATFORM_USES_ONLY_WIN32_API && !U_PLATFORM_HAS_WINUWP_API
2402
2403/* Windows API implementation. */
2404// Note: UWP does not expose/allow these APIs, so the UWP version gets the null implementation. */
2405
2406U_CAPI void * U_EXPORT2
2407uprv_dl_open(const char *libName, UErrorCode *status) {
2408 HMODULE lib = nullptr;
2409
2410 if(U_FAILURE(*status)) return nullptr;
2411
2412 lib = LoadLibraryA(libName);
2413
2414 if(lib==nullptr) {
2415 *status = U_MISSING_RESOURCE_ERROR;
2416 }
2417
2418 return (void*)lib;
2419}
2420
2421U_CAPI void U_EXPORT2
2422uprv_dl_close(void *lib, UErrorCode *status) {
2423 HMODULE handle = (HMODULE)lib;
2424 if(U_FAILURE(*status)) return;
2425
2426 FreeLibrary(handle);
2427
2428 return;
2429}
2430
2431U_CAPI UVoidFunction* U_EXPORT2
2432uprv_dlsym_func(void *lib, const char* sym, UErrorCode *status) {
2433 HMODULE handle = (HMODULE)lib;
2434 UVoidFunction* addr = nullptr;
2435
2436 if(U_FAILURE(*status) || lib==nullptr) return nullptr;
2437
2438 addr = (UVoidFunction*)GetProcAddress(handle, sym);
2439
2440 if(addr==nullptr) {
2441 DWORD lastError = GetLastError();
2442 if(lastError == ERROR_PROC_NOT_FOUND) {
2443 *status = U_MISSING_RESOURCE_ERROR;
2444 } else {
2445 *status = U_UNSUPPORTED_ERROR; /* other unknown error. */
2446 }
2447 }
2448
2449 return addr;
2450}
2451
2452#else
2453
2454/* No dynamic loading, null (nonexistent) implementation. */
2455
2456U_CAPI void * U_EXPORT2
2457uprv_dl_open(const char *libName, UErrorCode *status) {
2458 (void)libName;
2459 if(U_FAILURE(*status)) return nullptr;
2460 *status = U_UNSUPPORTED_ERROR;
2461 return nullptr;
2462}
2463
2464U_CAPI void U_EXPORT2
2465uprv_dl_close(void *lib, UErrorCode *status) {
2466 (void)lib;
2467 if(U_FAILURE(*status)) return;
2468 *status = U_UNSUPPORTED_ERROR;
2469 return;
2470}
2471
2472U_CAPI UVoidFunction* U_EXPORT2
2473uprv_dlsym_func(void *lib, const char* sym, UErrorCode *status) {
2474 (void)lib;
2475 (void)sym;
2476 if(U_SUCCESS(*status)) {
2477 *status = U_UNSUPPORTED_ERROR;
2478 }
2479 return (UVoidFunction*)nullptr;
2480}
2481
2482#endif
2483
2484/*
2485 * Hey, Emacs, please set the following:
2486 *
2487 * Local Variables:
2488 * indent-tabs-mode: nil
2489 * End:
2490 *
2491 */
2492