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1/* locale.c
2 *
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3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 * 2002, 2003, 2005, 2006, 2007, 2008 by Larry Wall and others
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5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
4ac71550 12 * A Elbereth Gilthoniel,
cdad3b53 13 * silivren penna míriel
4ac71550 14 * o menel aglar elenath!
cdad3b53 15 * Na-chaered palan-díriel
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16 * o galadhremmin ennorath,
17 * Fanuilos, le linnathon
18 * nef aear, si nef aearon!
19 *
20 * [p.238 of _The Lord of the Rings_, II/i: "Many Meetings"]
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21 */
22
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23/* utility functions for handling locale-specific stuff like what
24 * character represents the decimal point.
0d071d52 25 *
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26 * All C programs have an underlying locale. Perl code generally doesn't pay
27 * any attention to it except within the scope of a 'use locale'. For most
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28 * categories, it accomplishes this by just using different operations if it is
29 * in such scope than if not. However, various libc functions called by Perl
30 * are affected by the LC_NUMERIC category, so there are macros in perl.h that
31 * are used to toggle between the current locale and the C locale depending on
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32 * the desired behavior of those functions at the moment. And, LC_MESSAGES is
33 * switched to the C locale for outputting the message unless within the scope
34 * of 'use locale'.
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35 *
36 * This code now has multi-thread-safe locale handling on systems that support
37 * that. This is completely transparent to most XS code. On earlier systems,
38 * it would be possible to emulate thread-safe locales, but this likely would
39 * involve a lot of locale switching, and would require XS code changes.
40 * Macros could be written so that the code wouldn't have to know which type of
41 * system is being used. It's unlikely that we would ever do that, since most
42 * modern systems support thread-safe locales, but there was code written to
43 * this end, and is retained, #ifdef'd out.
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44 */
45
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46#include "EXTERN.h"
47#define PERL_IN_LOCALE_C
f7416781 48#include "perl_langinfo.h"
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49#include "perl.h"
50
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51#include "reentr.h"
52
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53#ifdef I_WCHAR
54# include <wchar.h>
55#endif
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56#ifdef I_WCTYPE
57# include <wctype.h>
58#endif
0dec74cd 59
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60/* If the environment says to, we can output debugging information during
61 * initialization. This is done before option parsing, and before any thread
62 * creation, so can be a file-level static */
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63#if ! defined(DEBUGGING) || defined(PERL_GLOBAL_STRUCT)
64# define debug_initialization 0
65# define DEBUG_INITIALIZATION_set(v)
66#else
2fcc0ca9 67static bool debug_initialization = FALSE;
5a4b0634 68# define DEBUG_INITIALIZATION_set(v) (debug_initialization = v)
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69#endif
70
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71
72/* Returns the Unix errno portion; ignoring any others. This is a macro here
73 * instead of putting it into perl.h, because unclear to khw what should be
74 * done generally. */
75#define GET_ERRNO saved_errno
76
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77/* strlen() of a literal string constant. We might want this more general,
78 * but using it in just this file for now. A problem with more generality is
79 * the compiler warnings about comparing unlike signs */
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80#define STRLENs(s) (sizeof("" s "") - 1)
81
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82/* Is the C string input 'name' "C" or "POSIX"? If so, and 'name' is the
83 * return of setlocale(), then this is extremely likely to be the C or POSIX
84 * locale. However, the output of setlocale() is documented to be opaque, but
85 * the odds are extremely small that it would return these two strings for some
86 * other locale. Note that VMS in these two locales includes many non-ASCII
87 * characters as controls and punctuation (below are hex bytes):
88 * cntrl: 84-97 9B-9F
89 * punct: A1-A3 A5 A7-AB B0-B3 B5-B7 B9-BD BF-CF D1-DD DF-EF F1-FD
90 * Oddly, none there are listed as alphas, though some represent alphabetics
91 * http://www.nntp.perl.org/group/perl.perl5.porters/2013/02/msg198753.html */
92#define isNAME_C_OR_POSIX(name) \
93 ( (name) != NULL \
94 && (( *(name) == 'C' && (*(name + 1)) == '\0') \
95 || strEQ((name), "POSIX")))
96
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97#ifdef USE_LOCALE
98
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99/* This code keeps a LRU cache of the UTF-8ness of the locales it has so-far
100 * looked up. This is in the form of a C string: */
101
102#define UTF8NESS_SEP "\v"
103#define UTF8NESS_PREFIX "\f"
104
105/* So, the string looks like:
98994639 106 *
47280b20 107 * \vC\a0\vPOSIX\a0\vam_ET\a0\vaf_ZA.utf8\a1\ven_US.UTF-8\a1\0
98994639 108 *
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109 * where the digit 0 after the \a indicates that the locale starting just
110 * after the preceding \v is not UTF-8, and the digit 1 mean it is. */
111
112STATIC_ASSERT_DECL(STRLENs(UTF8NESS_SEP) == 1);
113STATIC_ASSERT_DECL(STRLENs(UTF8NESS_PREFIX) == 1);
114
115#define C_and_POSIX_utf8ness UTF8NESS_SEP "C" UTF8NESS_PREFIX "0" \
116 UTF8NESS_SEP "POSIX" UTF8NESS_PREFIX "0"
117
118/* The cache is initialized to C_and_POSIX_utf8ness at start up. These are
119 * kept there always. The remining portion of the cache is LRU, with the
120 * oldest looked-up locale at the tail end */
121
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122STATIC char *
123S_stdize_locale(pTHX_ char *locs)
124{
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125 /* Standardize the locale name from a string returned by 'setlocale',
126 * possibly modifying that string.
127 *
128 * The typical return value of setlocale() is either
129 * (1) "xx_YY" if the first argument of setlocale() is not LC_ALL
130 * (2) "xa_YY xb_YY ..." if the first argument of setlocale() is LC_ALL
131 * (the space-separated values represent the various sublocales,
132 * in some unspecified order). This is not handled by this function.
133 *
134 * In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n",
135 * which is harmful for further use of the string in setlocale(). This
136 * function removes the trailing new line and everything up through the '='
137 * */
138
7452cf6a 139 const char * const s = strchr(locs, '=');
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140 bool okay = TRUE;
141
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142 PERL_ARGS_ASSERT_STDIZE_LOCALE;
143
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144 if (s) {
145 const char * const t = strchr(s, '.');
98994639 146 okay = FALSE;
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147 if (t) {
148 const char * const u = strchr(t, '\n');
149 if (u && (u[1] == 0)) {
150 const STRLEN len = u - s;
151 Move(s + 1, locs, len, char);
152 locs[len] = 0;
153 okay = TRUE;
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154 }
155 }
156 }
157
158 if (!okay)
159 Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs);
160
161 return locs;
162}
163
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164/* Two parallel arrays; first the locale categories Perl uses on this system;
165 * the second array is their names. These arrays are in mostly arbitrary
166 * order. */
167
168const int categories[] = {
169
170# ifdef USE_LOCALE_NUMERIC
171 LC_NUMERIC,
172# endif
173# ifdef USE_LOCALE_CTYPE
174 LC_CTYPE,
175# endif
176# ifdef USE_LOCALE_COLLATE
177 LC_COLLATE,
178# endif
179# ifdef USE_LOCALE_TIME
180 LC_TIME,
181# endif
182# ifdef USE_LOCALE_MESSAGES
183 LC_MESSAGES,
184# endif
185# ifdef USE_LOCALE_MONETARY
186 LC_MONETARY,
187# endif
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188# ifdef USE_LOCALE_ADDRESS
189 LC_ADDRESS,
190# endif
191# ifdef USE_LOCALE_IDENTIFICATION
192 LC_IDENTIFICATION,
193# endif
194# ifdef USE_LOCALE_MEASUREMENT
195 LC_MEASUREMENT,
196# endif
197# ifdef USE_LOCALE_PAPER
198 LC_PAPER,
199# endif
200# ifdef USE_LOCALE_TELEPHONE
201 LC_TELEPHONE,
202# endif
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203# ifdef LC_ALL
204 LC_ALL,
205# endif
206 -1 /* Placeholder because C doesn't allow a
207 trailing comma, and it would get complicated
208 with all the #ifdef's */
209};
210
211/* The top-most real element is LC_ALL */
212
4ef8bdf9 213const char * const category_names[] = {
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214
215# ifdef USE_LOCALE_NUMERIC
216 "LC_NUMERIC",
217# endif
218# ifdef USE_LOCALE_CTYPE
219 "LC_CTYPE",
220# endif
221# ifdef USE_LOCALE_COLLATE
222 "LC_COLLATE",
223# endif
224# ifdef USE_LOCALE_TIME
225 "LC_TIME",
226# endif
227# ifdef USE_LOCALE_MESSAGES
228 "LC_MESSAGES",
229# endif
230# ifdef USE_LOCALE_MONETARY
231 "LC_MONETARY",
232# endif
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233# ifdef USE_LOCALE_ADDRESS
234 "LC_ADDRESS",
235# endif
236# ifdef USE_LOCALE_IDENTIFICATION
237 "LC_IDENTIFICATION",
238# endif
239# ifdef USE_LOCALE_MEASUREMENT
240 "LC_MEASUREMENT",
241# endif
242# ifdef USE_LOCALE_PAPER
243 "LC_PAPER",
244# endif
245# ifdef USE_LOCALE_TELEPHONE
246 "LC_TELEPHONE",
247# endif
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248# ifdef LC_ALL
249 "LC_ALL",
250# endif
251 NULL /* Placeholder */
252 };
253
254# ifdef LC_ALL
255
256 /* On systems with LC_ALL, it is kept in the highest index position. (-2
257 * to account for the final unused placeholder element.) */
258# define NOMINAL_LC_ALL_INDEX (C_ARRAY_LENGTH(categories) - 2)
259
260# else
261
262 /* On systems without LC_ALL, we pretend it is there, one beyond the real
263 * top element, hence in the unused placeholder element. */
264# define NOMINAL_LC_ALL_INDEX (C_ARRAY_LENGTH(categories) - 1)
265
266# endif
267
268/* Pretending there is an LC_ALL element just above allows us to avoid most
269 * special cases. Most loops through these arrays in the code below are
270 * written like 'for (i = 0; i < NOMINAL_LC_ALL_INDEX; i++)'. They will work
271 * on either type of system. But the code must be written to not access the
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272 * element at 'LC_ALL_INDEX' except on platforms that have it. This can be
273 * checked for at compile time by using the #define LC_ALL_INDEX which is only
274 * defined if we do have LC_ALL. */
e5f10d49 275
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276STATIC const char *
277S_category_name(const int category)
278{
279 unsigned int i;
280
281#ifdef LC_ALL
282
283 if (category == LC_ALL) {
284 return "LC_ALL";
285 }
286
287#endif
288
289 for (i = 0; i < NOMINAL_LC_ALL_INDEX; i++) {
290 if (category == categories[i]) {
291 return category_names[i];
292 }
293 }
294
295 {
296 const char suffix[] = " (unknown)";
297 int temp = category;
298 Size_t length = sizeof(suffix) + 1;
299 char * unknown;
300 dTHX;
301
302 if (temp < 0) {
303 length++;
304 temp = - temp;
305 }
306
307 /* Calculate the number of digits */
308 while (temp >= 10) {
309 temp /= 10;
310 length++;
311 }
312
313 Newx(unknown, length, char);
314 my_snprintf(unknown, length, "%d%s", category, suffix);
315 SAVEFREEPV(unknown);
316 return unknown;
317 }
318}
319
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320/* Now create LC_foo_INDEX #defines for just those categories on this system */
321# ifdef USE_LOCALE_NUMERIC
322# define LC_NUMERIC_INDEX 0
323# define _DUMMY_NUMERIC LC_NUMERIC_INDEX
324# else
325# define _DUMMY_NUMERIC -1
326# endif
327# ifdef USE_LOCALE_CTYPE
328# define LC_CTYPE_INDEX _DUMMY_NUMERIC + 1
329# define _DUMMY_CTYPE LC_CTYPE_INDEX
330# else
331# define _DUMMY_CTYPE _DUMMY_NUMERIC
332# endif
333# ifdef USE_LOCALE_COLLATE
334# define LC_COLLATE_INDEX _DUMMY_CTYPE + 1
335# define _DUMMY_COLLATE LC_COLLATE_INDEX
336# else
8203b3c3 337# define _DUMMY_COLLATE _DUMMY_CTYPE
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338# endif
339# ifdef USE_LOCALE_TIME
340# define LC_TIME_INDEX _DUMMY_COLLATE + 1
341# define _DUMMY_TIME LC_TIME_INDEX
342# else
343# define _DUMMY_TIME _DUMMY_COLLATE
344# endif
345# ifdef USE_LOCALE_MESSAGES
346# define LC_MESSAGES_INDEX _DUMMY_TIME + 1
347# define _DUMMY_MESSAGES LC_MESSAGES_INDEX
348# else
349# define _DUMMY_MESSAGES _DUMMY_TIME
350# endif
351# ifdef USE_LOCALE_MONETARY
352# define LC_MONETARY_INDEX _DUMMY_MESSAGES + 1
353# define _DUMMY_MONETARY LC_MONETARY_INDEX
354# else
355# define _DUMMY_MONETARY _DUMMY_MESSAGES
356# endif
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357# ifdef USE_LOCALE_ADDRESS
358# define LC_ADDRESS_INDEX _DUMMY_MONETARY + 1
359# define _DUMMY_ADDRESS LC_ADDRESS_INDEX
360# else
361# define _DUMMY_ADDRESS _DUMMY_MONETARY
362# endif
363# ifdef USE_LOCALE_IDENTIFICATION
364# define LC_IDENTIFICATION_INDEX _DUMMY_ADDRESS + 1
365# define _DUMMY_IDENTIFICATION LC_IDENTIFICATION_INDEX
366# else
367# define _DUMMY_IDENTIFICATION _DUMMY_ADDRESS
368# endif
369# ifdef USE_LOCALE_MEASUREMENT
370# define LC_MEASUREMENT_INDEX _DUMMY_IDENTIFICATION + 1
371# define _DUMMY_MEASUREMENT LC_MEASUREMENT_INDEX
372# else
373# define _DUMMY_MEASUREMENT _DUMMY_IDENTIFICATION
374# endif
375# ifdef USE_LOCALE_PAPER
376# define LC_PAPER_INDEX _DUMMY_MEASUREMENT + 1
377# define _DUMMY_PAPER LC_PAPER_INDEX
378# else
379# define _DUMMY_PAPER _DUMMY_MEASUREMENT
380# endif
381# ifdef USE_LOCALE_TELEPHONE
382# define LC_TELEPHONE_INDEX _DUMMY_PAPER + 1
383# define _DUMMY_TELEPHONE LC_TELEPHONE_INDEX
384# else
385# define _DUMMY_TELEPHONE _DUMMY_PAPER
386# endif
948523db 387# ifdef LC_ALL
9821811f 388# define LC_ALL_INDEX _DUMMY_TELEPHONE + 1
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389# endif
390#endif /* ifdef USE_LOCALE */
8ef6e574 391
d2b24094 392/* Windows requres a customized base-level setlocale() */
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393#ifdef WIN32
394# define my_setlocale(cat, locale) win32_setlocale(cat, locale)
395#else
396# define my_setlocale(cat, locale) setlocale(cat, locale)
397#endif
398
399#ifndef USE_POSIX_2008_LOCALE
400
401/* "do_setlocale_c" is intended to be called when the category is a constant
402 * known at compile time; "do_setlocale_r", not known until run time */
403# define do_setlocale_c(cat, locale) my_setlocale(cat, locale)
404# define do_setlocale_r(cat, locale) my_setlocale(cat, locale)
405
406#else /* Below uses POSIX 2008 */
407
408/* We emulate setlocale with our own function. LC_foo is not valid for the
409 * POSIX 2008 functions. Instead LC_foo_MASK is used, which we use an array
410 * lookup to convert to. At compile time we have defined LC_foo_INDEX as the
411 * proper offset into the array 'category_masks[]'. At runtime, we have to
412 * search through the array (as the actual numbers may not be small contiguous
413 * positive integers which would lend themselves to array lookup). */
414# define do_setlocale_c(cat, locale) \
415 emulate_setlocale(cat, locale, cat ## _INDEX, TRUE)
416# define do_setlocale_r(cat, locale) emulate_setlocale(cat, locale, 0, FALSE)
417
418/* A third array, parallel to the ones above to map from category to its
419 * equivalent mask */
420const int category_masks[] = {
421# ifdef USE_LOCALE_NUMERIC
422 LC_NUMERIC_MASK,
423# endif
424# ifdef USE_LOCALE_CTYPE
425 LC_CTYPE_MASK,
426# endif
427# ifdef USE_LOCALE_COLLATE
428 LC_COLLATE_MASK,
429# endif
430# ifdef USE_LOCALE_TIME
431 LC_TIME_MASK,
432# endif
433# ifdef USE_LOCALE_MESSAGES
434 LC_MESSAGES_MASK,
435# endif
436# ifdef USE_LOCALE_MONETARY
437 LC_MONETARY_MASK,
438# endif
439# ifdef USE_LOCALE_ADDRESS
440 LC_ADDRESS_MASK,
441# endif
442# ifdef USE_LOCALE_IDENTIFICATION
443 LC_IDENTIFICATION_MASK,
444# endif
445# ifdef USE_LOCALE_MEASUREMENT
446 LC_MEASUREMENT_MASK,
447# endif
448# ifdef USE_LOCALE_PAPER
449 LC_PAPER_MASK,
450# endif
451# ifdef USE_LOCALE_TELEPHONE
452 LC_TELEPHONE_MASK,
453# endif
454 /* LC_ALL can't be turned off by a Configure
455 * option, and in Posix 2008, should always be
456 * here, so compile it in unconditionally.
457 * This could catch some glitches at compile
458 * time */
459 LC_ALL_MASK
460 };
461
462STATIC const char *
463S_emulate_setlocale(const int category,
464 const char * locale,
465 unsigned int index,
466 const bool is_index_valid
467 )
468{
469 /* This function effectively performs a setlocale() on just the current
470 * thread; thus it is thread-safe. It does this by using the POSIX 2008
471 * locale functions to emulate the behavior of setlocale(). Similar to
472 * regular setlocale(), the return from this function points to memory that
473 * can be overwritten by other system calls, so needs to be copied
474 * immediately if you need to retain it. The difference here is that
475 * system calls besides another setlocale() can overwrite it.
476 *
477 * By doing this, most locale-sensitive functions become thread-safe. The
478 * exceptions are mostly those that return a pointer to static memory.
479 *
480 * This function takes the same parameters, 'category' and 'locale', that
481 * the regular setlocale() function does, but it also takes two additional
482 * ones. This is because the 2008 functions don't use a category; instead
483 * they use a corresponding mask. Because this function operates in both
484 * worlds, it may need one or the other or both. This function can
485 * calculate the mask from the input category, but to avoid this
486 * calculation, if the caller knows at compile time what the mask is, it
487 * can pass it, setting 'is_index_valid' to TRUE; otherwise the mask
488 * parameter is ignored.
489 *
490 * POSIX 2008, for some sick reason, chose not to provide a method to find
491 * the category name of a locale. Some vendors have created a
492 * querylocale() function to do just that. This function is a lot simpler
493 * to implement on systems that have this. Otherwise, we have to keep
494 * track of what the locale has been set to, so that we can return its
495 * name to emulate setlocale(). It's also possible for C code in some
496 * library to change the locale without us knowing it, though as of
497 * September 2017, there are no occurrences in CPAN of uselocale(). Some
498 * libraries do use setlocale(), but that changes the global locale, and
499 * threads using per-thread locales will just ignore those changes.
500 * Another problem is that without querylocale(), we have to guess at what
501 * was meant by setting a locale of "". We handle this by not actually
502 * ever setting to "" (unless querylocale exists), but to emulate what we
503 * think should happen for "".
504 */
505
506 int mask;
507 locale_t old_obj;
508 locale_t new_obj;
509 dTHX;
510
511# ifdef DEBUGGING
512
513 if (DEBUG_Lv_TEST || debug_initialization) {
514 PerlIO_printf(Perl_debug_log, "%s:%d: emulate_setlocale input=%d (%s), \"%s\", %d, %d\n", __FILE__, __LINE__, category, category_name(category), locale, index, is_index_valid);
515 }
516
517# endif
518
519 /* If the input mask might be incorrect, calculate the correct one */
520 if (! is_index_valid) {
521 unsigned int i;
522
523# ifdef DEBUGGING
524
525 if (DEBUG_Lv_TEST || debug_initialization) {
526 PerlIO_printf(Perl_debug_log, "%s:%d: finding index of category %d (%s)\n", __FILE__, __LINE__, category, category_name(category));
527 }
528
529# endif
530
531 for (i = 0; i <= LC_ALL_INDEX; i++) {
532 if (category == categories[i]) {
533 index = i;
534 goto found_index;
535 }
536 }
537
538 /* Here, we don't know about this category, so can't handle it.
539 * Fallback to the early POSIX usages */
540 Perl_warner(aTHX_ packWARN(WARN_LOCALE),
541 "Unknown locale category %d; can't set it to %s\n",
542 category, locale);
543 return NULL;
544
545 found_index: ;
546
547# ifdef DEBUGGING
548
549 if (DEBUG_Lv_TEST || debug_initialization) {
550 PerlIO_printf(Perl_debug_log, "%s:%d: index is %d for %s\n", __FILE__, __LINE__, index, category_name(category));
551 }
552
553# endif
554
555 }
556
557 mask = category_masks[index];
558
559# ifdef DEBUGGING
560
561 if (DEBUG_Lv_TEST || debug_initialization) {
562 PerlIO_printf(Perl_debug_log, "%s:%d: category name is %s; mask is 0x%x\n", __FILE__, __LINE__, category_names[index], mask);
563 }
564
565# endif
566
567 /* If just querying what the existing locale is ... */
568 if (locale == NULL) {
569 locale_t cur_obj = uselocale((locale_t) 0);
570
571# ifdef DEBUGGING
572
573 if (DEBUG_Lv_TEST || debug_initialization) {
574 PerlIO_printf(Perl_debug_log, "%s:%d: emulate_setlocale querying %p\n", __FILE__, __LINE__, cur_obj);
575 }
576
577# endif
578
579 if (cur_obj == LC_GLOBAL_LOCALE) {
580 return my_setlocale(category, NULL);
581 }
582
583# ifdef HAS_QUERYLOCALE
584
585 return (char *) querylocale(mask, cur_obj);
586
d2b24094 587# else
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588
589 /* If this assert fails, adjust the size of curlocales in intrpvar.h */
590 STATIC_ASSERT_STMT(C_ARRAY_LENGTH(PL_curlocales) > LC_ALL_INDEX);
591
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592# if defined(_NL_LOCALE_NAME) \
593 && defined(DEBUGGING) \
594 && ! defined(SETLOCALE_ACCEPTS_ANY_LOCALE_NAME)
595 /* On systems that accept any locale name, the real underlying locale
596 * is often returned by this internal function, so we can't use it */
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597 {
598 /* Internal glibc for querylocale(), but doesn't handle
599 * empty-string ("") locale properly; who knows what other
3a732259 600 * glitches. Check for it now, under debug. */
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601
602 char * temp_name = nl_langinfo_l(_NL_LOCALE_NAME(category),
603 uselocale((locale_t) 0));
604 /*
605 PerlIO_printf(Perl_debug_log, "%s:%d: temp_name=%s\n", __FILE__, __LINE__, temp_name ? temp_name : "NULL");
606 PerlIO_printf(Perl_debug_log, "%s:%d: index=%d\n", __FILE__, __LINE__, index);
607 PerlIO_printf(Perl_debug_log, "%s:%d: PL_curlocales[index]=%s\n", __FILE__, __LINE__, PL_curlocales[index]);
608 */
609 if (temp_name && PL_curlocales[index] && strNE(temp_name, "")) {
610 if ( strNE(PL_curlocales[index], temp_name)
611 && ! ( isNAME_C_OR_POSIX(temp_name)
612 && isNAME_C_OR_POSIX(PL_curlocales[index]))) {
613
614# ifdef USE_C_BACKTRACE
615
616 dump_c_backtrace(Perl_debug_log, 20, 1);
617
618# endif
619
620 Perl_croak(aTHX_ "panic: Mismatch between what Perl thinks %s is"
621 " (%s) and what internal glibc thinks"
622 " (%s)\n", category_names[index],
623 PL_curlocales[index], temp_name);
624 }
625
626 return temp_name;
627 }
628 }
629
630# endif
631
632 /* Without querylocale(), we have to use our record-keeping we've
633 * done. */
634
635 if (category != LC_ALL) {
636
637# ifdef DEBUGGING
638
639 if (DEBUG_Lv_TEST || debug_initialization) {
640 PerlIO_printf(Perl_debug_log, "%s:%d: emulate_setlocale returning %s\n", __FILE__, __LINE__, PL_curlocales[index]);
641 }
642
643# endif
644
645 return PL_curlocales[index];
646 }
647 else { /* For LC_ALL */
648 unsigned int i;
649 Size_t names_len = 0;
650 char * all_string;
7c93a471 651 bool are_all_categories_the_same_locale = TRUE;
e9bc6d6b
KW
652
653 /* If we have a valid LC_ALL value, just return it */
654 if (PL_curlocales[LC_ALL_INDEX]) {
655
656# ifdef DEBUGGING
657
658 if (DEBUG_Lv_TEST || debug_initialization) {
659 PerlIO_printf(Perl_debug_log, "%s:%d: emulate_setlocale returning %s\n", __FILE__, __LINE__, PL_curlocales[LC_ALL_INDEX]);
660 }
661
662# endif
663
664 return PL_curlocales[LC_ALL_INDEX];
665 }
666
667 /* Otherwise, we need to construct a string of name=value pairs.
668 * We use the glibc syntax, like
669 * LC_NUMERIC=C;LC_TIME=en_US.UTF-8;...
7c93a471
KW
670 * First calculate the needed size. Along the way, check if all
671 * the locale names are the same */
e9bc6d6b
KW
672 for (i = 0; i < LC_ALL_INDEX; i++) {
673
674# ifdef DEBUGGING
675
676 if (DEBUG_Lv_TEST || debug_initialization) {
677 PerlIO_printf(Perl_debug_log, "%s:%d: emulate_setlocale i=%d, name=%s, locale=%s\n", __FILE__, __LINE__, i, category_names[i], PL_curlocales[i]);
678 }
679
680# endif
681
682 names_len += strlen(category_names[i])
683 + 1 /* '=' */
684 + strlen(PL_curlocales[i])
685 + 1; /* ';' */
7c93a471
KW
686
687 if (i > 0 && strNE(PL_curlocales[i], PL_curlocales[i-1])) {
688 are_all_categories_the_same_locale = FALSE;
689 }
690 }
691
692 /* If they are the same, we don't actually have to construct the
693 * string; we just make the entry in LC_ALL_INDEX valid, and be
694 * that single name */
695 if (are_all_categories_the_same_locale) {
696 PL_curlocales[LC_ALL_INDEX] = savepv(PL_curlocales[0]);
697 return PL_curlocales[LC_ALL_INDEX];
e9bc6d6b 698 }
7c93a471 699
e9bc6d6b
KW
700 names_len++; /* Trailing '\0' */
701 SAVEFREEPV(Newx(all_string, names_len, char));
702 *all_string = '\0';
703
704 /* Then fill in the string */
705 for (i = 0; i < LC_ALL_INDEX; i++) {
706
707# ifdef DEBUGGING
708
709 if (DEBUG_Lv_TEST || debug_initialization) {
710 PerlIO_printf(Perl_debug_log, "%s:%d: emulate_setlocale i=%d, name=%s, locale=%s\n", __FILE__, __LINE__, i, category_names[i], PL_curlocales[i]);
711 }
712
713# endif
714
715 my_strlcat(all_string, category_names[i], names_len);
716 my_strlcat(all_string, "=", names_len);
717 my_strlcat(all_string, PL_curlocales[i], names_len);
718 my_strlcat(all_string, ";", names_len);
719 }
720
721# ifdef DEBUGGING
722
723 if (DEBUG_L_TEST || debug_initialization) {
724 PerlIO_printf(Perl_debug_log, "%s:%d: emulate_setlocale returning %s\n", __FILE__, __LINE__, all_string);
725 }
726
727 #endif
728
729 return all_string;
730 }
731
732# ifdef EINVAL
733
734 SETERRNO(EINVAL, LIB_INVARG);
735
736# endif
737
738 return NULL;
739
d2b24094
KW
740# endif
741
6aba5c5e 742 } /* End of this being setlocale(LC_foo, NULL) */
e9bc6d6b 743
f8115d60 744 /* Here, we are switching locales. */
e9bc6d6b
KW
745
746# ifndef HAS_QUERYLOCALE
747
748 if (strEQ(locale, "")) {
749
750 /* For non-querylocale() systems, we do the setting of "" ourselves to
751 * be sure that we really know what's going on. We follow the Linux
752 * documented behavior (but if that differs from the actual behavior,
753 * this won't work exactly as the OS implements). We go out and
754 * examine the environment based on our understanding of how the system
755 * works, and use that to figure things out */
756
757 const char * const lc_all = PerlEnv_getenv("LC_ALL");
758
759 /* Use any "LC_ALL" environment variable, as it overrides everything
760 * else. */
761 if (lc_all && strNE(lc_all, "")) {
762 locale = lc_all;
763 }
764 else {
765
766 /* Otherwise, we need to dig deeper. Unless overridden, the
767 * default is the LANG environment variable; if it doesn't exist,
768 * then "C" */
769
770 const char * default_name;
771
207cc8df 772 default_name = PerlEnv_getenv("LANG");
e9bc6d6b
KW
773
774 if (! default_name || strEQ(default_name, "")) {
929a7f8c 775 default_name = "C";
e9bc6d6b
KW
776 }
777 else if (PL_scopestack_ix != 0) {
207cc8df
DM
778 /* To minimize other threads messing with the environment,
779 * we copy the variable, making it a temporary. But this
780 * doesn't work upon program initialization before any
781 * scopes are created, and at this time, there's nothing
782 * else going on that would interfere. So skip the copy
783 * in that case */
784 default_name = savepv(default_name);
e9bc6d6b
KW
785 SAVEFREEPV(default_name);
786 }
787
788 if (category != LC_ALL) {
789 const char * const name = PerlEnv_getenv(category_names[index]);
790
791 /* Here we are setting a single category. Assume will have the
792 * default name */
793 locale = default_name;
794
795 /* But then look for an overriding environment variable */
796 if (name && strNE(name, "")) {
797 locale = name;
798 }
799 }
800 else {
801 bool did_override = FALSE;
802 unsigned int i;
803
804 /* Here, we are getting LC_ALL. Any categories that don't have
805 * a corresponding environment variable set should be set to
806 * LANG, or to "C" if there is no LANG. If no individual
807 * categories differ from this, we can just set LC_ALL. This
808 * is buggy on systems that have extra categories that we don't
809 * know about. If there is an environment variable that sets
810 * that category, we won't know to look for it, and so our use
811 * of LANG or "C" improperly overrides it. On the other hand,
812 * if we don't do what is done here, and there is no
813 * environment variable, the category's locale should be set to
814 * LANG or "C". So there is no good solution. khw thinks the
815 * best is to look at systems to see what categories they have,
816 * and include them, and then to assume that we know the
817 * complete set */
818
819 for (i = 0; i < LC_ALL_INDEX; i++) {
820 const char * const env_override
821 = savepv(PerlEnv_getenv(category_names[i]));
822 const char * this_locale = ( env_override
823 && strNE(env_override, ""))
824 ? env_override
825 : default_name;
6435f98d
KW
826 if (! emulate_setlocale(categories[i], this_locale, i, TRUE))
827 {
828 Safefree(env_override);
829 return NULL;
830 }
e9bc6d6b
KW
831
832 if (strNE(this_locale, default_name)) {
833 did_override = TRUE;
834 }
835
836 Safefree(env_override);
837 }
838
839 /* If all the categories are the same, we can set LC_ALL to
840 * that */
841 if (! did_override) {
842 locale = default_name;
843 }
844 else {
845
846 /* Here, LC_ALL is no longer valid, as some individual
847 * categories don't match it. We call ourselves
848 * recursively, as that will execute the code that
849 * generates the proper locale string for this situation.
850 * We don't do the remainder of this function, as that is
851 * to update our records, and we've just done that for the
852 * individual categories in the loop above, and doing so
853 * would cause LC_ALL to be done as well */
854 return emulate_setlocale(LC_ALL, NULL, LC_ALL_INDEX, TRUE);
855 }
856 }
857 }
6aba5c5e 858 } /* End of this being setlocale(LC_foo, "") */
e9bc6d6b
KW
859 else if (strchr(locale, ';')) {
860
861 /* LC_ALL may actually incude a conglomeration of various categories.
862 * Without querylocale, this code uses the glibc (as of this writing)
863 * syntax for representing that, but that is not a stable API, and
864 * other platforms do it differently, so we have to handle all cases
865 * ourselves */
866
f0023d47 867 unsigned int i;
e9bc6d6b
KW
868 const char * s = locale;
869 const char * e = locale + strlen(locale);
870 const char * p = s;
871 const char * category_end;
872 const char * name_start;
873 const char * name_end;
874
f0023d47
KW
875 /* If the string that gives what to set doesn't include all categories,
876 * the omitted ones get set to "C". To get this behavior, first set
877 * all the individual categories to "C", and override the furnished
878 * ones below */
879 for (i = 0; i < LC_ALL_INDEX; i++) {
880 if (! emulate_setlocale(categories[i], "C", i, TRUE)) {
881 return NULL;
882 }
883 }
884
e9bc6d6b 885 while (s < e) {
e9bc6d6b
KW
886
887 /* Parse through the category */
888 while (isWORDCHAR(*p)) {
889 p++;
890 }
891 category_end = p;
892
893 if (*p++ != '=') {
894 Perl_croak(aTHX_
895 "panic: %s: %d: Unexpected character in locale name '%02X",
896 __FILE__, __LINE__, *(p-1));
897 }
898
899 /* Parse through the locale name */
900 name_start = p;
bee74f4b
KW
901 while (p < e && *p != ';') {
902 if (! isGRAPH(*p)) {
903 Perl_croak(aTHX_
904 "panic: %s: %d: Unexpected character in locale name '%02X",
905 __FILE__, __LINE__, *(p-1));
906 }
e9bc6d6b
KW
907 p++;
908 }
909 name_end = p;
910
bee74f4b
KW
911 /* Space past the semi-colon */
912 if (p < e) {
913 p++;
e9bc6d6b
KW
914 }
915
916 /* Find the index of the category name in our lists */
917 for (i = 0; i < LC_ALL_INDEX; i++) {
3c76a412 918 char * individ_locale;
e9bc6d6b
KW
919
920 /* Keep going if this isn't the index. The strnNE() avoids a
921 * Perl_form(), but would fail if ever a category name could be
922 * a substring of another one, like if there were a
923 * "LC_TIME_DATE" */
924 if strnNE(s, category_names[i], category_end - s) {
925 continue;
926 }
927
928 /* If this index is for the single category we're changing, we
929 * have found the locale to set it to. */
930 if (category == categories[i]) {
931 locale = Perl_form(aTHX_ "%.*s",
932 (int) (name_end - name_start),
933 name_start);
934 goto ready_to_set;
935 }
936
3c76a412 937 assert(category == LC_ALL);
bee74f4b
KW
938 individ_locale = Perl_form(aTHX_ "%.*s",
939 (int) (name_end - name_start), name_start);
6435f98d
KW
940 if (! emulate_setlocale(categories[i], individ_locale, i, TRUE))
941 {
942 return NULL;
943 }
e9bc6d6b
KW
944 }
945
946 s = p;
947 }
948
949 /* Here we have set all the individual categories by recursive calls.
950 * These collectively should have fixed up LC_ALL, so can just query
951 * what that now is */
952 assert(category == LC_ALL);
953
954 return do_setlocale_c(LC_ALL, NULL);
6aba5c5e
KW
955 } /* End of this being setlocale(LC_ALL,
956 "LC_CTYPE=foo;LC_NUMERIC=bar;...") */
e9bc6d6b
KW
957
958 ready_to_set: ;
959
f8115d60
KW
960 /* Here at the end of having to deal with the absence of querylocale().
961 * Some cases have already been fully handled by recursive calls to this
962 * function. But at this point, we haven't dealt with those, but are now
963 * prepared to, knowing what the locale name to set this category to is.
964 * This would have come for free if this system had had querylocale() */
965
e9bc6d6b
KW
966# endif /* end of ! querylocale */
967
f8115d60
KW
968 assert(PL_C_locale_obj);
969
970 /* Switching locales generally entails freeing the current one's space (at
971 * the C library's discretion). We need to stop using that locale before
972 * the switch. So switch to a known locale object that we don't otherwise
973 * mess with. This returns the locale object in effect at the time of the
974 * switch. */
975 old_obj = uselocale(PL_C_locale_obj);
976
977# ifdef DEBUGGING
978
979 if (DEBUG_Lv_TEST || debug_initialization) {
980 PerlIO_printf(Perl_debug_log, "%s:%d: emulate_setlocale was using %p\n", __FILE__, __LINE__, old_obj);
981 }
982
983# endif
984
985 if (! old_obj) {
986
987# ifdef DEBUGGING
988
989 if (DEBUG_L_TEST || debug_initialization) {
990 dSAVE_ERRNO;
991 PerlIO_printf(Perl_debug_log, "%s:%d: emulate_setlocale switching to C failed: %d\n", __FILE__, __LINE__, GET_ERRNO);
992 RESTORE_ERRNO;
993 }
994
995# endif
996
997 return NULL;
998 }
999
1000# ifdef DEBUGGING
1001
1002 if (DEBUG_Lv_TEST || debug_initialization) {
b22e9937
KW
1003 PerlIO_printf(Perl_debug_log,
1004 "%s:%d: emulate_setlocale now using %p\n",
1005 __FILE__, __LINE__, PL_C_locale_obj);
f8115d60
KW
1006 }
1007
1008# endif
1009
6aba5c5e
KW
1010 /* If this call is to switch to the LC_ALL C locale, it already exists, and
1011 * in fact, we already have switched to it (in preparation for what
1012 * normally is to come). But since we're already there, continue to use
70bd6bc8
KW
1013 * it instead of trying to create a new locale */
1014 if (mask == LC_ALL_MASK && isNAME_C_OR_POSIX(locale)) {
1015
1016# ifdef DEBUGGING
1017
1018 if (DEBUG_Lv_TEST || debug_initialization) {
1019 PerlIO_printf(Perl_debug_log,
1020 "%s:%d: will stay in C object\n", __FILE__, __LINE__);
1021 }
1022
1023# endif
1024
1025 new_obj = PL_C_locale_obj;
1026
1027 /* We already had switched to the C locale in preparation for freeing
b22e9937 1028 * 'old_obj' */
70bd6bc8
KW
1029 if (old_obj != LC_GLOBAL_LOCALE && old_obj != PL_C_locale_obj) {
1030 freelocale(old_obj);
1031 }
1032 }
1033 else {
b22e9937
KW
1034 /* If we weren't in a thread safe locale, set so that newlocale() below
1035 * which uses 'old_obj', uses an empty one. Same for our reserved C
1036 * object. The latter is defensive coding, so that, even if there is
1037 * some bug, we will never end up trying to modify either of these, as
1038 * if passed to newlocale(), they can be. */
1039 if (old_obj == LC_GLOBAL_LOCALE || old_obj == PL_C_locale_obj) {
1040 old_obj = (locale_t) 0;
1041 }
f8115d60 1042
b22e9937
KW
1043 /* Ready to create a new locale by modification of the exising one */
1044 new_obj = newlocale(mask, locale, old_obj);
e9bc6d6b 1045
b22e9937
KW
1046 if (! new_obj) {
1047 dSAVE_ERRNO;
e9bc6d6b
KW
1048
1049# ifdef DEBUGGING
1050
b22e9937
KW
1051 if (DEBUG_L_TEST || debug_initialization) {
1052 PerlIO_printf(Perl_debug_log,
1053 "%s:%d: emulate_setlocale creating new object"
1054 " failed: %d\n", __FILE__, __LINE__, GET_ERRNO);
1055 }
e9bc6d6b
KW
1056
1057# endif
1058
b22e9937 1059 if (! uselocale(old_obj)) {
e9bc6d6b
KW
1060
1061# ifdef DEBUGGING
1062
b22e9937
KW
1063 if (DEBUG_L_TEST || debug_initialization) {
1064 PerlIO_printf(Perl_debug_log,
1065 "%s:%d: switching back failed: %d\n",
1066 __FILE__, __LINE__, GET_ERRNO);
1067 }
e9bc6d6b
KW
1068
1069# endif
1070
b22e9937
KW
1071 }
1072 RESTORE_ERRNO;
1073 return NULL;
e9bc6d6b 1074 }
e9bc6d6b
KW
1075
1076# ifdef DEBUGGING
1077
b22e9937
KW
1078 if (DEBUG_Lv_TEST || debug_initialization) {
1079 PerlIO_printf(Perl_debug_log,
1080 "%s:%d: emulate_setlocale created %p",
1081 __FILE__, __LINE__, new_obj);
1082 if (old_obj) {
1083 PerlIO_printf(Perl_debug_log,
1084 "; should have freed %p", old_obj);
1085 }
1086 PerlIO_printf(Perl_debug_log, "\n");
19ee3daf 1087 }
e9bc6d6b
KW
1088
1089# endif
1090
b22e9937
KW
1091 /* And switch into it */
1092 if (! uselocale(new_obj)) {
1093 dSAVE_ERRNO;
e9bc6d6b
KW
1094
1095# ifdef DEBUGGING
1096
b22e9937
KW
1097 if (DEBUG_L_TEST || debug_initialization) {
1098 PerlIO_printf(Perl_debug_log,
1099 "%s:%d: emulate_setlocale switching to new object"
1100 " failed\n", __FILE__, __LINE__);
1101 }
e9bc6d6b
KW
1102
1103# endif
1104
b22e9937 1105 if (! uselocale(old_obj)) {
e9bc6d6b
KW
1106
1107# ifdef DEBUGGING
1108
b22e9937
KW
1109 if (DEBUG_L_TEST || debug_initialization) {
1110 PerlIO_printf(Perl_debug_log,
1111 "%s:%d: switching back failed: %d\n",
1112 __FILE__, __LINE__, GET_ERRNO);
1113 }
e9bc6d6b
KW
1114
1115# endif
1116
b22e9937
KW
1117 }
1118 freelocale(new_obj);
1119 RESTORE_ERRNO;
1120 return NULL;
e9bc6d6b 1121 }
70bd6bc8 1122 }
e9bc6d6b
KW
1123
1124# ifdef DEBUGGING
1125
1126 if (DEBUG_Lv_TEST || debug_initialization) {
b22e9937
KW
1127 PerlIO_printf(Perl_debug_log,
1128 "%s:%d: emulate_setlocale now using %p\n",
1129 __FILE__, __LINE__, new_obj);
e9bc6d6b
KW
1130 }
1131
1132# endif
1133
1134 /* We are done, except for updating our records (if the system doesn't keep
1135 * them) and in the case of locale "", we don't actually know what the
1136 * locale that got switched to is, as it came from the environment. So
1137 * have to find it */
1138
1139# ifdef HAS_QUERYLOCALE
1140
1141 if (strEQ(locale, "")) {
1142 locale = querylocale(mask, new_obj);
1143 }
1144
1145# else
1146
1147 /* Here, 'locale' is the return value */
1148
1149 /* Without querylocale(), we have to update our records */
1150
1151 if (category == LC_ALL) {
1152 unsigned int i;
1153
1154 /* For LC_ALL, we change all individual categories to correspond */
1155 /* PL_curlocales is a parallel array, so has same
1156 * length as 'categories' */
1157 for (i = 0; i <= LC_ALL_INDEX; i++) {
1158 Safefree(PL_curlocales[i]);
1159 PL_curlocales[i] = savepv(locale);
1160 }
1161 }
1162 else {
1163
1164 /* For a single category, if it's not the same as the one in LC_ALL, we
1165 * nullify LC_ALL */
1166
1167 if (PL_curlocales[LC_ALL_INDEX] && strNE(PL_curlocales[LC_ALL_INDEX], locale)) {
1168 Safefree(PL_curlocales[LC_ALL_INDEX]);
1169 PL_curlocales[LC_ALL_INDEX] = NULL;
1170 }
1171
1172 /* Then update the category's record */
1173 Safefree(PL_curlocales[index]);
1174 PL_curlocales[index] = savepv(locale);
1175 }
1176
1177# endif
1178
1179 return locale;
1180}
1181
1182#endif /* USE_POSIX_2008_LOCALE */
1183
1184#if 0 /* Code that was to emulate thread-safe locales on platforms that
1185 didn't natively support them */
1186
1187/* The way this would work is that we would keep a per-thread list of the
1188 * correct locale for that thread. Any operation that was locale-sensitive
1189 * would have to be changed so that it would look like this:
1190 *
1191 * LOCALE_LOCK;
1192 * setlocale to the correct locale for this operation
1193 * do operation
1194 * LOCALE_UNLOCK
1195 *
1196 * This leaves the global locale in the most recently used operation's, but it
1197 * was locked long enough to get the result. If that result is static, it
1198 * needs to be copied before the unlock.
1199 *
1200 * Macros could be written like SETUP_LOCALE_DEPENDENT_OP(category) that did
1201 * the setup, but are no-ops when not needed, and similarly,
1202 * END_LOCALE_DEPENDENT_OP for the tear-down
1203 *
1204 * But every call to a locale-sensitive function would have to be changed, and
1205 * if a module didn't cooperate by using the mutex, things would break.
1206 *
1207 * This code was abandoned before being completed or tested, and is left as-is
1208*/
1209
1210# define do_setlocale_c(cat, locale) locking_setlocale(cat, locale, cat ## _INDEX, TRUE)
1211# define do_setlocale_r(cat, locale) locking_setlocale(cat, locale, 0, FALSE)
1212
1213STATIC char *
1214S_locking_setlocale(pTHX_
1215 const int category,
1216 const char * locale,
1217 int index,
1218 const bool is_index_valid
1219 )
1220{
1221 /* This function kind of performs a setlocale() on just the current thread;
1222 * thus it is kind of thread-safe. It does this by keeping a thread-level
1223 * array of the current locales for each category. Every time a locale is
1224 * switched to, it does the switch globally, but updates the thread's
1225 * array. A query as to what the current locale is just returns the
1226 * appropriate element from the array, and doesn't actually call the system
1227 * setlocale(). The saving into the array is done in an uninterruptible
1228 * section of code, so is unaffected by whatever any other threads might be
1229 * doing.
1230 *
1231 * All locale-sensitive operations must work by first starting a critical
1232 * section, then switching to the thread's locale as kept by this function,
1233 * and then doing the operation, then ending the critical section. Thus,
1234 * each gets done in the appropriate locale. simulating thread-safety.
1235 *
1236 * This function takes the same parameters, 'category' and 'locale', that
1237 * the regular setlocale() function does, but it also takes two additional
1238 * ones. This is because as described earlier. If we know on input the
1239 * index corresponding to the category into the array where we store the
1240 * current locales, we don't have to calculate it. If the caller knows at
06cc5386 1241 * compile time what the index is, it can pass it, setting
e9bc6d6b
KW
1242 * 'is_index_valid' to TRUE; otherwise the index parameter is ignored.
1243 *
1244 */
1245
1246 /* If the input index might be incorrect, calculate the correct one */
1247 if (! is_index_valid) {
1248 unsigned int i;
1249
1250 if (DEBUG_Lv_TEST || debug_initialization) {
1251 PerlIO_printf(Perl_debug_log, "%s:%d: converting category %d to index\n", __FILE__, __LINE__, category);
1252 }
1253
1254 for (i = 0; i <= LC_ALL_INDEX; i++) {
1255 if (category == categories[i]) {
1256 index = i;
1257 goto found_index;
1258 }
1259 }
1260
1261 /* Here, we don't know about this category, so can't handle it.
1262 * XXX best we can do is to unsafely set this
1263 * XXX warning */
1264
1265 return my_setlocale(category, locale);
1266
1267 found_index: ;
1268
1269 if (DEBUG_Lv_TEST || debug_initialization) {
1270 PerlIO_printf(Perl_debug_log, "%s:%d: index is 0x%x\n", __FILE__, __LINE__, index);
1271 }
1272 }
1273
1274 /* For a query, just return what's in our records */
1275 if (new_locale == NULL) {
1276 return curlocales[index];
1277 }
1278
1279
1280 /* Otherwise, we need to do the switch, and save the result, all in a
1281 * critical section */
1282
1283 Safefree(curlocales[[index]]);
1284
1285 /* It might be that this is called from an already-locked section of code.
1286 * We would have to detect and skip the LOCK/UNLOCK if so */
1287 LOCALE_LOCK;
1288
1289 curlocales[index] = savepv(my_setlocale(category, new_locale));
1290
1291 if (strEQ(new_locale, "")) {
1292
1293#ifdef LC_ALL
1294
1295 /* The locale values come from the environment, and may not all be the
1296 * same, so for LC_ALL, we have to update all the others, while the
1297 * mutex is still locked */
1298
1299 if (category == LC_ALL) {
1300 unsigned int i;
1301 for (i = 0; i < LC_ALL_INDEX) {
1302 curlocales[i] = my_setlocale(categories[i], NULL);
1303 }
1304 }
1305 }
1306
1307#endif
1308
1309 LOCALE_UNLOCK;
1310
1311 return curlocales[index];
1312}
1313
1314#endif
d36adde0 1315#ifdef USE_LOCALE
837ce802 1316
a4f00dcc 1317STATIC void
86799d2d 1318S_set_numeric_radix(pTHX_ const bool use_locale)
98994639 1319{
86799d2d
KW
1320 /* If 'use_locale' is FALSE, set to use a dot for the radix character. If
1321 * TRUE, use the radix character derived from the current locale */
7d4bcc4a 1322
86799d2d
KW
1323#if defined(USE_LOCALE_NUMERIC) && ( defined(HAS_LOCALECONV) \
1324 || defined(HAS_NL_LANGINFO))
98994639 1325
87f8e8e7 1326 const char * radix = (use_locale)
4e6826bf 1327 ? my_nl_langinfo(RADIXCHAR, FALSE)
87f8e8e7
KW
1328 /* FALSE => already in dest locale */
1329 : ".";
2213a3be 1330
87f8e8e7 1331 sv_setpv(PL_numeric_radix_sv, radix);
86799d2d 1332
87f8e8e7
KW
1333 /* If this is valid UTF-8 that isn't totally ASCII, and we are in
1334 * a UTF-8 locale, then mark the radix as being in UTF-8 */
1335 if (is_utf8_non_invariant_string((U8 *) SvPVX(PL_numeric_radix_sv),
7a393424 1336 SvCUR(PL_numeric_radix_sv))
87f8e8e7
KW
1337 && _is_cur_LC_category_utf8(LC_NUMERIC))
1338 {
1339 SvUTF8_on(PL_numeric_radix_sv);
1340 }
86799d2d
KW
1341
1342# ifdef DEBUGGING
7d4bcc4a 1343
2fcc0ca9
KW
1344 if (DEBUG_L_TEST || debug_initialization) {
1345 PerlIO_printf(Perl_debug_log, "Locale radix is '%s', ?UTF-8=%d\n",
3ca88433
KW
1346 SvPVX(PL_numeric_radix_sv),
1347 cBOOL(SvUTF8(PL_numeric_radix_sv)));
2fcc0ca9 1348 }
69014004 1349
86799d2d 1350# endif
d36adde0
KW
1351#else
1352
1353 PERL_UNUSED_ARG(use_locale);
1354
86799d2d 1355#endif /* USE_LOCALE_NUMERIC and can find the radix char */
7d4bcc4a 1356
98994639
HS
1357}
1358
398eeea9
KW
1359STATIC void
1360S_new_numeric(pTHX_ const char *newnum)
98994639 1361{
7d4bcc4a
KW
1362
1363#ifndef USE_LOCALE_NUMERIC
1364
1365 PERL_UNUSED_ARG(newnum);
1366
1367#else
0d071d52 1368
291a84fb 1369 /* Called after each libc setlocale() call affecting LC_NUMERIC, to tell
0d071d52
KW
1370 * core Perl this and that 'newnum' is the name of the new locale.
1371 * It installs this locale as the current underlying default.
1372 *
1373 * The default locale and the C locale can be toggled between by use of the
5792c642
KW
1374 * set_numeric_underlying() and set_numeric_standard() functions, which
1375 * should probably not be called directly, but only via macros like
0d071d52
KW
1376 * SET_NUMERIC_STANDARD() in perl.h.
1377 *
1378 * The toggling is necessary mainly so that a non-dot radix decimal point
1379 * character can be output, while allowing internal calculations to use a
1380 * dot.
1381 *
1382 * This sets several interpreter-level variables:
bb304765 1383 * PL_numeric_name The underlying locale's name: a copy of 'newnum'
892e6465 1384 * PL_numeric_underlying A boolean indicating if the toggled state is such
7738054c
KW
1385 * that the current locale is the program's underlying
1386 * locale
1387 * PL_numeric_standard An int indicating if the toggled state is such
4c68b815
KW
1388 * that the current locale is the C locale or
1389 * indistinguishable from the C locale. If non-zero, it
1390 * is in C; if > 1, it means it may not be toggled away
7738054c 1391 * from C.
4c68b815
KW
1392 * PL_numeric_underlying_is_standard A bool kept by this function
1393 * indicating that the underlying locale and the standard
1394 * C locale are indistinguishable for the purposes of
1395 * LC_NUMERIC. This happens when both of the above two
1396 * variables are true at the same time. (Toggling is a
1397 * no-op under these circumstances.) This variable is
1398 * used to avoid having to recalculate.
398eeea9 1399 */
0d071d52 1400
b03f34cf 1401 char *save_newnum;
98994639
HS
1402
1403 if (! newnum) {
43c5f42d
NC
1404 Safefree(PL_numeric_name);
1405 PL_numeric_name = NULL;
98994639 1406 PL_numeric_standard = TRUE;
892e6465 1407 PL_numeric_underlying = TRUE;
4c68b815 1408 PL_numeric_underlying_is_standard = TRUE;
98994639
HS
1409 return;
1410 }
1411
b03f34cf 1412 save_newnum = stdize_locale(savepv(newnum));
892e6465 1413 PL_numeric_underlying = TRUE;
4c68b815
KW
1414 PL_numeric_standard = isNAME_C_OR_POSIX(save_newnum);
1415
69c5e0db
KW
1416#ifndef TS_W32_BROKEN_LOCALECONV
1417
4c68b815 1418 /* If its name isn't C nor POSIX, it could still be indistinguishable from
69c5e0db
KW
1419 * them. But on broken Windows systems calling my_nl_langinfo() for
1420 * THOUSEP can currently (but rarely) cause a race, so avoid doing that,
1421 * and just always change the locale if not C nor POSIX on those systems */
4c68b815 1422 if (! PL_numeric_standard) {
4e6826bf 1423 PL_numeric_standard = cBOOL(strEQ(".", my_nl_langinfo(RADIXCHAR,
4c68b815 1424 FALSE /* Don't toggle locale */ ))
4e6826bf 1425 && strEQ("", my_nl_langinfo(THOUSEP, FALSE)));
4c68b815 1426 }
abe1abcf 1427
69c5e0db
KW
1428#endif
1429
4c68b815 1430 /* Save the new name if it isn't the same as the previous one, if any */
b03f34cf 1431 if (! PL_numeric_name || strNE(PL_numeric_name, save_newnum)) {
98994639 1432 Safefree(PL_numeric_name);
b03f34cf 1433 PL_numeric_name = save_newnum;
b03f34cf 1434 }
abe1abcf
KW
1435 else {
1436 Safefree(save_newnum);
1437 }
4c28b29c 1438
4c68b815
KW
1439 PL_numeric_underlying_is_standard = PL_numeric_standard;
1440
7e5377f7 1441# ifdef HAS_POSIX_2008_LOCALE
e1aa2579
KW
1442
1443 PL_underlying_numeric_obj = newlocale(LC_NUMERIC_MASK,
1444 PL_numeric_name,
1445 PL_underlying_numeric_obj);
1446
1447#endif
1448
4c68b815
KW
1449 if (DEBUG_L_TEST || debug_initialization) {
1450 PerlIO_printf(Perl_debug_log, "Called new_numeric with %s, PL_numeric_name=%s\n", newnum, PL_numeric_name);
1451 }
1452
4c28b29c
KW
1453 /* Keep LC_NUMERIC in the C locale. This is for XS modules, so they don't
1454 * have to worry about the radix being a non-dot. (Core operations that
1455 * need the underlying locale change to it temporarily). */
84f1d29f
KW
1456 if (PL_numeric_standard) {
1457 set_numeric_radix(0);
1458 }
1459 else {
1460 set_numeric_standard();
1461 }
4c28b29c 1462
98994639 1463#endif /* USE_LOCALE_NUMERIC */
7d4bcc4a 1464
98994639
HS
1465}
1466
1467void
1468Perl_set_numeric_standard(pTHX)
1469{
7d4bcc4a 1470
98994639 1471#ifdef USE_LOCALE_NUMERIC
7d4bcc4a 1472
28c1bf33
KW
1473 /* Toggle the LC_NUMERIC locale to C. Most code should use the macros like
1474 * SET_NUMERIC_STANDARD() in perl.h instead of calling this directly. The
1475 * macro avoids calling this routine if toggling isn't necessary according
1476 * to our records (which could be wrong if some XS code has changed the
1477 * locale behind our back) */
0d071d52 1478
7d4bcc4a
KW
1479# ifdef DEBUGGING
1480
2fcc0ca9
KW
1481 if (DEBUG_L_TEST || debug_initialization) {
1482 PerlIO_printf(Perl_debug_log,
7bb8f702 1483 "Setting LC_NUMERIC locale to standard C\n");
2fcc0ca9 1484 }
98994639 1485
7d4bcc4a 1486# endif
7bb8f702
KW
1487
1488 do_setlocale_c(LC_NUMERIC, "C");
1489 PL_numeric_standard = TRUE;
1490 PL_numeric_underlying = PL_numeric_underlying_is_standard;
1491 set_numeric_radix(0);
1492
98994639 1493#endif /* USE_LOCALE_NUMERIC */
7d4bcc4a 1494
98994639
HS
1495}
1496
1497void
5792c642 1498Perl_set_numeric_underlying(pTHX)
98994639 1499{
7d4bcc4a 1500
98994639 1501#ifdef USE_LOCALE_NUMERIC
7d4bcc4a 1502
28c1bf33 1503 /* Toggle the LC_NUMERIC locale to the current underlying default. Most
7d4bcc4a
KW
1504 * code should use the macros like SET_NUMERIC_UNDERLYING() in perl.h
1505 * instead of calling this directly. The macro avoids calling this routine
1506 * if toggling isn't necessary according to our records (which could be
1507 * wrong if some XS code has changed the locale behind our back) */
a9b8c0d8 1508
7d4bcc4a
KW
1509# ifdef DEBUGGING
1510
2fcc0ca9
KW
1511 if (DEBUG_L_TEST || debug_initialization) {
1512 PerlIO_printf(Perl_debug_log,
7bb8f702 1513 "Setting LC_NUMERIC locale to %s\n",
2fcc0ca9
KW
1514 PL_numeric_name);
1515 }
98994639 1516
7d4bcc4a 1517# endif
7bb8f702
KW
1518
1519 do_setlocale_c(LC_NUMERIC, PL_numeric_name);
1520 PL_numeric_standard = PL_numeric_underlying_is_standard;
1521 PL_numeric_underlying = TRUE;
1522 set_numeric_radix(! PL_numeric_standard);
1523
98994639 1524#endif /* USE_LOCALE_NUMERIC */
7d4bcc4a 1525
98994639
HS
1526}
1527
1528/*
1529 * Set up for a new ctype locale.
1530 */
a4f00dcc
KW
1531STATIC void
1532S_new_ctype(pTHX_ const char *newctype)
98994639 1533{
7d4bcc4a
KW
1534
1535#ifndef USE_LOCALE_CTYPE
1536
7d4bcc4a
KW
1537 PERL_UNUSED_ARG(newctype);
1538 PERL_UNUSED_CONTEXT;
1539
1540#else
0d071d52 1541
291a84fb 1542 /* Called after each libc setlocale() call affecting LC_CTYPE, to tell
0d071d52
KW
1543 * core Perl this and that 'newctype' is the name of the new locale.
1544 *
1545 * This function sets up the folding arrays for all 256 bytes, assuming
1546 * that tofold() is tolc() since fold case is not a concept in POSIX,
1547 *
1548 * Any code changing the locale (outside this file) should use
9aac5db8
KW
1549 * Perl_setlocale or POSIX::setlocale, which call this function. Therefore
1550 * this function should be called directly only from this file and from
0d071d52
KW
1551 * POSIX::setlocale() */
1552
27da23d5 1553 dVAR;
013f4e03 1554 unsigned int i;
98994639 1555
8b7358b9
KW
1556 /* Don't check for problems if we are suppressing the warnings */
1557 bool check_for_problems = ckWARN_d(WARN_LOCALE) || UNLIKELY(DEBUG_L_TEST);
30d8090d 1558 bool maybe_utf8_turkic = FALSE;
8b7358b9 1559
7918f24d
NC
1560 PERL_ARGS_ASSERT_NEW_CTYPE;
1561
215c5139
KW
1562 /* We will replace any bad locale warning with 1) nothing if the new one is
1563 * ok; or 2) a new warning for the bad new locale */
1564 if (PL_warn_locale) {
1565 SvREFCNT_dec_NN(PL_warn_locale);
1566 PL_warn_locale = NULL;
1567 }
1568
c1284011 1569 PL_in_utf8_CTYPE_locale = _is_cur_LC_category_utf8(LC_CTYPE);
31f05a37
KW
1570
1571 /* A UTF-8 locale gets standard rules. But note that code still has to
1572 * handle this specially because of the three problematic code points */
1573 if (PL_in_utf8_CTYPE_locale) {
1574 Copy(PL_fold_latin1, PL_fold_locale, 256, U8);
30d8090d
KW
1575
1576 /* UTF-8 locales can have special handling for 'I' and 'i' if they are
1577 * Turkic. Make sure these two are the only anomalies. (We don't use
1578 * towupper and towlower because they aren't in C89.) */
5b64f24c
KW
1579
1580#if defined(HAS_TOWUPPER) && defined (HAS_TOWLOWER)
1581
1582 if (towupper('i') == 0x130 && towlower('I') == 0x131) {
1583
1584#else
1585
30d8090d 1586 if (toupper('i') == 'i' && tolower('I') == 'I') {
5b64f24c
KW
1587
1588#endif
30d8090d
KW
1589 check_for_problems = TRUE;
1590 maybe_utf8_turkic = TRUE;
1591 }
31f05a37 1592 }
8b7358b9
KW
1593
1594 /* We don't populate the other lists if a UTF-8 locale, but do check that
1595 * everything works as expected, unless checking turned off */
1596 if (check_for_problems || ! PL_in_utf8_CTYPE_locale) {
8c6180a9
KW
1597 /* Assume enough space for every character being bad. 4 spaces each
1598 * for the 94 printable characters that are output like "'x' "; and 5
1599 * spaces each for "'\\' ", "'\t' ", and "'\n' "; plus a terminating
1600 * NUL */
8b7358b9 1601 char bad_chars_list[ (94 * 4) + (3 * 5) + 1 ] = { '\0' };
8c6180a9
KW
1602 bool multi_byte_locale = FALSE; /* Assume is a single-byte locale
1603 to start */
1604 unsigned int bad_count = 0; /* Count of bad characters */
1605
baa60164 1606 for (i = 0; i < 256; i++) {
8b7358b9 1607 if (! PL_in_utf8_CTYPE_locale) {
bd6d0898
KW
1608 if (isupper(i))
1609 PL_fold_locale[i] = (U8) tolower(i);
1610 else if (islower(i))
1611 PL_fold_locale[i] = (U8) toupper(i);
1612 else
1613 PL_fold_locale[i] = (U8) i;
8b7358b9 1614 }
8c6180a9
KW
1615
1616 /* If checking for locale problems, see if the native ASCII-range
1617 * printables plus \n and \t are in their expected categories in
1618 * the new locale. If not, this could mean big trouble, upending
1619 * Perl's and most programs' assumptions, like having a
1620 * metacharacter with special meaning become a \w. Fortunately,
1621 * it's very rare to find locales that aren't supersets of ASCII
1622 * nowadays. It isn't a problem for most controls to be changed
1623 * into something else; we check only \n and \t, though perhaps \r
1624 * could be an issue as well. */
7d4bcc4a 1625 if ( check_for_problems
8c6180a9
KW
1626 && (isGRAPH_A(i) || isBLANK_A(i) || i == '\n'))
1627 {
8b7358b9 1628 bool is_bad = FALSE;
6726b4f4 1629 char name[4] = { '\0' };
8b7358b9
KW
1630
1631 /* Convert the name into a string */
6726b4f4 1632 if (isGRAPH_A(i)) {
8b7358b9
KW
1633 name[0] = i;
1634 name[1] = '\0';
1635 }
1636 else if (i == '\n') {
6726b4f4
KW
1637 my_strlcpy(name, "\\n", sizeof(name));
1638 }
1639 else if (i == '\t') {
1640 my_strlcpy(name, "\\t", sizeof(name));
8b7358b9
KW
1641 }
1642 else {
6726b4f4
KW
1643 assert(i == ' ');
1644 my_strlcpy(name, "' '", sizeof(name));
8b7358b9
KW
1645 }
1646
1647 /* Check each possibe class */
1648 if (UNLIKELY(cBOOL(isalnum(i)) != cBOOL(isALPHANUMERIC_A(i)))) {
1649 is_bad = TRUE;
1650 DEBUG_L(PerlIO_printf(Perl_debug_log,
1651 "isalnum('%s') unexpectedly is %d\n",
1652 name, cBOOL(isalnum(i))));
1653 }
1654 if (UNLIKELY(cBOOL(isalpha(i)) != cBOOL(isALPHA_A(i)))) {
1655 is_bad = TRUE;
1656 DEBUG_L(PerlIO_printf(Perl_debug_log,
1657 "isalpha('%s') unexpectedly is %d\n",
1658 name, cBOOL(isalpha(i))));
1659 }
1660 if (UNLIKELY(cBOOL(isdigit(i)) != cBOOL(isDIGIT_A(i)))) {
1661 is_bad = TRUE;
1662 DEBUG_L(PerlIO_printf(Perl_debug_log,
1663 "isdigit('%s') unexpectedly is %d\n",
1664 name, cBOOL(isdigit(i))));
1665 }
1666 if (UNLIKELY(cBOOL(isgraph(i)) != cBOOL(isGRAPH_A(i)))) {
1667 is_bad = TRUE;
1668 DEBUG_L(PerlIO_printf(Perl_debug_log,
1669 "isgraph('%s') unexpectedly is %d\n",
1670 name, cBOOL(isgraph(i))));
1671 }
1672 if (UNLIKELY(cBOOL(islower(i)) != cBOOL(isLOWER_A(i)))) {
1673 is_bad = TRUE;
1674 DEBUG_L(PerlIO_printf(Perl_debug_log,
1675 "islower('%s') unexpectedly is %d\n",
1676 name, cBOOL(islower(i))));
1677 }
1678 if (UNLIKELY(cBOOL(isprint(i)) != cBOOL(isPRINT_A(i)))) {
1679 is_bad = TRUE;
1680 DEBUG_L(PerlIO_printf(Perl_debug_log,
1681 "isprint('%s') unexpectedly is %d\n",
1682 name, cBOOL(isprint(i))));
1683 }
1684 if (UNLIKELY(cBOOL(ispunct(i)) != cBOOL(isPUNCT_A(i)))) {
1685 is_bad = TRUE;
1686 DEBUG_L(PerlIO_printf(Perl_debug_log,
1687 "ispunct('%s') unexpectedly is %d\n",
1688 name, cBOOL(ispunct(i))));
1689 }
1690 if (UNLIKELY(cBOOL(isspace(i)) != cBOOL(isSPACE_A(i)))) {
1691 is_bad = TRUE;
1692 DEBUG_L(PerlIO_printf(Perl_debug_log,
1693 "isspace('%s') unexpectedly is %d\n",
1694 name, cBOOL(isspace(i))));
1695 }
1696 if (UNLIKELY(cBOOL(isupper(i)) != cBOOL(isUPPER_A(i)))) {
1697 is_bad = TRUE;
1698 DEBUG_L(PerlIO_printf(Perl_debug_log,
1699 "isupper('%s') unexpectedly is %d\n",
1700 name, cBOOL(isupper(i))));
1701 }
1702 if (UNLIKELY(cBOOL(isxdigit(i))!= cBOOL(isXDIGIT_A(i)))) {
1703 is_bad = TRUE;
1704 DEBUG_L(PerlIO_printf(Perl_debug_log,
1705 "isxdigit('%s') unexpectedly is %d\n",
1706 name, cBOOL(isxdigit(i))));
1707 }
1708 if (UNLIKELY(tolower(i) != (int) toLOWER_A(i))) {
1709 is_bad = TRUE;
1710 DEBUG_L(PerlIO_printf(Perl_debug_log,
1711 "tolower('%s')=0x%x instead of the expected 0x%x\n",
1712 name, tolower(i), (int) toLOWER_A(i)));
1713 }
1714 if (UNLIKELY(toupper(i) != (int) toUPPER_A(i))) {
1715 is_bad = TRUE;
1716 DEBUG_L(PerlIO_printf(Perl_debug_log,
1717 "toupper('%s')=0x%x instead of the expected 0x%x\n",
1718 name, toupper(i), (int) toUPPER_A(i)));
1719 }
1720 if (UNLIKELY((i == '\n' && ! isCNTRL_LC(i)))) {
1721 is_bad = TRUE;
1722 DEBUG_L(PerlIO_printf(Perl_debug_log,
1723 "'\\n' (=%02X) is not a control\n", (int) i));
1724 }
1725
1726 /* Add to the list; Separate multiple entries with a blank */
1727 if (is_bad) {
1728 if (bad_count) {
1729 my_strlcat(bad_chars_list, " ", sizeof(bad_chars_list));
8c6180a9 1730 }
8b7358b9
KW
1731 my_strlcat(bad_chars_list, name, sizeof(bad_chars_list));
1732 bad_count++;
8c6180a9
KW
1733 }
1734 }
1735 }
1736
30d8090d
KW
1737 if (bad_count == 2 && maybe_utf8_turkic) {
1738 bad_count = 0;
1739 *bad_chars_list = '\0';
1740 PL_fold_locale['I'] = 'I';
1741 PL_fold_locale['i'] = 'i';
1742 PL_in_utf8_turkic_locale = TRUE;
1743 DEBUG_L(PerlIO_printf(Perl_debug_log, "%s:%d: %s is turkic\n",
1744 __FILE__, __LINE__, newctype));
1745 }
1746 else {
b8df1494 1747 PL_in_utf8_turkic_locale = FALSE;
30d8090d 1748 }
b8df1494 1749
7d4bcc4a
KW
1750# ifdef MB_CUR_MAX
1751
8c6180a9 1752 /* We only handle single-byte locales (outside of UTF-8 ones; so if
d35fca5f 1753 * this locale requires more than one byte, there are going to be
8c6180a9 1754 * problems. */
9c8a6dc2
KW
1755 DEBUG_Lv(PerlIO_printf(Perl_debug_log,
1756 "%s:%d: check_for_problems=%d, MB_CUR_MAX=%d\n",
1757 __FILE__, __LINE__, check_for_problems, (int) MB_CUR_MAX));
1758
8b7358b9
KW
1759 if ( check_for_problems && MB_CUR_MAX > 1
1760 && ! PL_in_utf8_CTYPE_locale
ba1a4362
KW
1761
1762 /* Some platforms return MB_CUR_MAX > 1 for even the "C"
1763 * locale. Just assume that the implementation for them (plus
1764 * for POSIX) is correct and the > 1 value is spurious. (Since
1765 * these are specially handled to never be considered UTF-8
1766 * locales, as long as this is the only problem, everything
1767 * should work fine */
1768 && strNE(newctype, "C") && strNE(newctype, "POSIX"))
1769 {
8c6180a9
KW
1770 multi_byte_locale = TRUE;
1771 }
7d4bcc4a
KW
1772
1773# endif
8c6180a9 1774
30d8090d
KW
1775 /* If we found problems and we want them output, do so */
1776 if ( (UNLIKELY(bad_count) || UNLIKELY(multi_byte_locale))
1777 && (LIKELY(ckWARN_d(WARN_LOCALE)) || UNLIKELY(DEBUG_L_TEST)))
1778 {
8b7358b9
KW
1779 if (UNLIKELY(bad_count) && PL_in_utf8_CTYPE_locale) {
1780 PL_warn_locale = Perl_newSVpvf(aTHX_
1781 "Locale '%s' contains (at least) the following characters"
578a6a87
KW
1782 " which have\nunexpected meanings: %s\nThe Perl program"
1783 " will use the expected meanings",
8b7358b9 1784 newctype, bad_chars_list);
8b7358b9
KW
1785 }
1786 else {
1787 PL_warn_locale = Perl_newSVpvf(aTHX_
8c6180a9 1788 "Locale '%s' may not work well.%s%s%s\n",
780fcc9f 1789 newctype,
8c6180a9
KW
1790 (multi_byte_locale)
1791 ? " Some characters in it are not recognized by"
1792 " Perl."
1793 : "",
1794 (bad_count)
1795 ? "\nThe following characters (and maybe others)"
1796 " may not have the same meaning as the Perl"
1797 " program expects:\n"
1798 : "",
1799 (bad_count)
1800 ? bad_chars_list
1801 : ""
1802 );
8b7358b9
KW
1803 }
1804
b119c2be
KW
1805# ifdef HAS_NL_LANGINFO
1806
1807 Perl_sv_catpvf(aTHX_ PL_warn_locale, "; codeset=%s",
1808 /* parameter FALSE is a don't care here */
4e6826bf 1809 my_nl_langinfo(CODESET, FALSE));
b119c2be
KW
1810
1811# endif
1812
8b7358b9
KW
1813 Perl_sv_catpvf(aTHX_ PL_warn_locale, "\n");
1814
cc9eaeb0 1815 /* If we are actually in the scope of the locale or are debugging,
bddebb56
KW
1816 * output the message now. If not in that scope, we save the
1817 * message to be output at the first operation using this locale,
1818 * if that actually happens. Most programs don't use locales, so
1819 * they are immune to bad ones. */
cc9eaeb0 1820 if (IN_LC(LC_CTYPE) || UNLIKELY(DEBUG_L_TEST)) {
780fcc9f 1821
780fcc9f
KW
1822 /* The '0' below suppresses a bogus gcc compiler warning */
1823 Perl_warner(aTHX_ packWARN(WARN_LOCALE), SvPVX(PL_warn_locale), 0);
bddebb56 1824
bddebb56
KW
1825 if (IN_LC(LC_CTYPE)) {
1826 SvREFCNT_dec_NN(PL_warn_locale);
1827 PL_warn_locale = NULL;
1828 }
780fcc9f 1829 }
baa60164 1830 }
31f05a37 1831 }
98994639
HS
1832
1833#endif /* USE_LOCALE_CTYPE */
7d4bcc4a 1834
98994639
HS
1835}
1836
98994639 1837void
2726666d
KW
1838Perl__warn_problematic_locale()
1839{
2726666d
KW
1840
1841#ifdef USE_LOCALE_CTYPE
1842
5f04a188
KW
1843 dTHX;
1844
1845 /* Internal-to-core function that outputs the message in PL_warn_locale,
1846 * and then NULLS it. Should be called only through the macro
1847 * _CHECK_AND_WARN_PROBLEMATIC_LOCALE */
1848
2726666d 1849 if (PL_warn_locale) {
2726666d
KW
1850 Perl_ck_warner(aTHX_ packWARN(WARN_LOCALE),
1851 SvPVX(PL_warn_locale),
1852 0 /* dummy to avoid compiler warning */ );
2726666d
KW
1853 SvREFCNT_dec_NN(PL_warn_locale);
1854 PL_warn_locale = NULL;
1855 }
1856
1857#endif
1858
1859}
1860
a4f00dcc
KW
1861STATIC void
1862S_new_collate(pTHX_ const char *newcoll)
98994639 1863{
7d4bcc4a
KW
1864
1865#ifndef USE_LOCALE_COLLATE
1866
1867 PERL_UNUSED_ARG(newcoll);
1868 PERL_UNUSED_CONTEXT;
1869
1870#else
0d071d52 1871
291a84fb 1872 /* Called after each libc setlocale() call affecting LC_COLLATE, to tell
0d071d52
KW
1873 * core Perl this and that 'newcoll' is the name of the new locale.
1874 *
d35fca5f
KW
1875 * The design of locale collation is that every locale change is given an
1876 * index 'PL_collation_ix'. The first time a string particpates in an
1877 * operation that requires collation while locale collation is active, it
1878 * is given PERL_MAGIC_collxfrm magic (via sv_collxfrm_flags()). That
1879 * magic includes the collation index, and the transformation of the string
1880 * by strxfrm(), q.v. That transformation is used when doing comparisons,
1881 * instead of the string itself. If a string changes, the magic is
1882 * cleared. The next time the locale changes, the index is incremented,
1883 * and so we know during a comparison that the transformation is not
1884 * necessarily still valid, and so is recomputed. Note that if the locale
1885 * changes enough times, the index could wrap (a U32), and it is possible
1886 * that a transformation would improperly be considered valid, leading to
1887 * an unlikely bug */
0d071d52 1888
98994639
HS
1889 if (! newcoll) {
1890 if (PL_collation_name) {
1891 ++PL_collation_ix;
1892 Safefree(PL_collation_name);
1893 PL_collation_name = NULL;
1894 }
1895 PL_collation_standard = TRUE;
00bf60ca 1896 is_standard_collation:
98994639
HS
1897 PL_collxfrm_base = 0;
1898 PL_collxfrm_mult = 2;
165a1c52 1899 PL_in_utf8_COLLATE_locale = FALSE;
f28f4d2a 1900 PL_strxfrm_NUL_replacement = '\0';
a4a439fb 1901 PL_strxfrm_max_cp = 0;
98994639
HS
1902 return;
1903 }
1904
d35fca5f 1905 /* If this is not the same locale as currently, set the new one up */
98994639
HS
1906 if (! PL_collation_name || strNE(PL_collation_name, newcoll)) {
1907 ++PL_collation_ix;
1908 Safefree(PL_collation_name);
1909 PL_collation_name = stdize_locale(savepv(newcoll));
a39edc4c 1910 PL_collation_standard = isNAME_C_OR_POSIX(newcoll);
00bf60ca
KW
1911 if (PL_collation_standard) {
1912 goto is_standard_collation;
1913 }
98994639 1914
165a1c52 1915 PL_in_utf8_COLLATE_locale = _is_cur_LC_category_utf8(LC_COLLATE);
f28f4d2a 1916 PL_strxfrm_NUL_replacement = '\0';
a4a439fb 1917 PL_strxfrm_max_cp = 0;
165a1c52 1918
59c018b9
KW
1919 /* A locale collation definition includes primary, secondary, tertiary,
1920 * etc. weights for each character. To sort, the primary weights are
1921 * used, and only if they compare equal, then the secondary weights are
1922 * used, and only if they compare equal, then the tertiary, etc.
1923 *
1924 * strxfrm() works by taking the input string, say ABC, and creating an
1925 * output transformed string consisting of first the primary weights,
1926 * A¹B¹C¹ followed by the secondary ones, A²B²C²; and then the
1927 * tertiary, etc, yielding A¹B¹C¹ A²B²C² A³B³C³ .... Some characters
1928 * may not have weights at every level. In our example, let's say B
1929 * doesn't have a tertiary weight, and A doesn't have a secondary
1930 * weight. The constructed string is then going to be
1931 * A¹B¹C¹ B²C² A³C³ ....
1932 * This has the desired effect that strcmp() will look at the secondary
1933 * or tertiary weights only if the strings compare equal at all higher
1934 * priority weights. The spaces shown here, like in
c342d20e 1935 * "A¹B¹C¹ A²B²C² "
59c018b9
KW
1936 * are not just for readability. In the general case, these must
1937 * actually be bytes, which we will call here 'separator weights'; and
1938 * they must be smaller than any other weight value, but since these
1939 * are C strings, only the terminating one can be a NUL (some
1940 * implementations may include a non-NUL separator weight just before
1941 * the NUL). Implementations tend to reserve 01 for the separator
1942 * weights. They are needed so that a shorter string's secondary
1943 * weights won't be misconstrued as primary weights of a longer string,
1944 * etc. By making them smaller than any other weight, the shorter
1945 * string will sort first. (Actually, if all secondary weights are
1946 * smaller than all primary ones, there is no need for a separator
1947 * weight between those two levels, etc.)
1948 *
1949 * The length of the transformed string is roughly a linear function of
1950 * the input string. It's not exactly linear because some characters
1951 * don't have weights at all levels. When we call strxfrm() we have to
1952 * allocate some memory to hold the transformed string. The
1953 * calculations below try to find coefficients 'm' and 'b' for this
1954 * locale so that m*x + b equals how much space we need, given the size
1955 * of the input string in 'x'. If we calculate too small, we increase
1956 * the size as needed, and call strxfrm() again, but it is better to
1957 * get it right the first time to avoid wasted expensive string
1958 * transformations. */
1959
98994639 1960 {
79f120c8
KW
1961 /* We use the string below to find how long the tranformation of it
1962 * is. Almost all locales are supersets of ASCII, or at least the
1963 * ASCII letters. We use all of them, half upper half lower,
1964 * because if we used fewer, we might hit just the ones that are
1965 * outliers in a particular locale. Most of the strings being
1966 * collated will contain a preponderance of letters, and even if
1967 * they are above-ASCII, they are likely to have the same number of
1968 * weight levels as the ASCII ones. It turns out that digits tend
1969 * to have fewer levels, and some punctuation has more, but those
1970 * are relatively sparse in text, and khw believes this gives a
1971 * reasonable result, but it could be changed if experience so
1972 * dictates. */
1973 const char longer[] = "ABCDEFGHIJKLMnopqrstuvwxyz";
1974 char * x_longer; /* Transformed 'longer' */
1975 Size_t x_len_longer; /* Length of 'x_longer' */
1976
1977 char * x_shorter; /* We also transform a substring of 'longer' */
1978 Size_t x_len_shorter;
1979
a4a439fb 1980 /* _mem_collxfrm() is used get the transformation (though here we
79f120c8
KW
1981 * are interested only in its length). It is used because it has
1982 * the intelligence to handle all cases, but to work, it needs some
1983 * values of 'm' and 'b' to get it started. For the purposes of
1984 * this calculation we use a very conservative estimate of 'm' and
1985 * 'b'. This assumes a weight can be multiple bytes, enough to
1986 * hold any UV on the platform, and there are 5 levels, 4 weight
1987 * bytes, and a trailing NUL. */
1988 PL_collxfrm_base = 5;
1989 PL_collxfrm_mult = 5 * sizeof(UV);
1990
1991 /* Find out how long the transformation really is */
a4a439fb
KW
1992 x_longer = _mem_collxfrm(longer,
1993 sizeof(longer) - 1,
1994 &x_len_longer,
1995
1996 /* We avoid converting to UTF-8 in the
1997 * called function by telling it the
1998 * string is in UTF-8 if the locale is a
1999 * UTF-8 one. Since the string passed
2000 * here is invariant under UTF-8, we can
2001 * claim it's UTF-8 even though it isn't.
2002 * */
2003 PL_in_utf8_COLLATE_locale);
79f120c8
KW
2004 Safefree(x_longer);
2005
2006 /* Find out how long the transformation of a substring of 'longer'
2007 * is. Together the lengths of these transformations are
2008 * sufficient to calculate 'm' and 'b'. The substring is all of
2009 * 'longer' except the first character. This minimizes the chances
2010 * of being swayed by outliers */
a4a439fb 2011 x_shorter = _mem_collxfrm(longer + 1,
79f120c8 2012 sizeof(longer) - 2,
a4a439fb
KW
2013 &x_len_shorter,
2014 PL_in_utf8_COLLATE_locale);
79f120c8
KW
2015 Safefree(x_shorter);
2016
2017 /* If the results are nonsensical for this simple test, the whole
2018 * locale definition is suspect. Mark it so that locale collation
2019 * is not active at all for it. XXX Should we warn? */
2020 if ( x_len_shorter == 0
2021 || x_len_longer == 0
2022 || x_len_shorter >= x_len_longer)
2023 {
2024 PL_collxfrm_mult = 0;
2025 PL_collxfrm_base = 0;
2026 }
2027 else {
2028 SSize_t base; /* Temporary */
2029
2030 /* We have both: m * strlen(longer) + b = x_len_longer
2031 * m * strlen(shorter) + b = x_len_shorter;
2032 * subtracting yields:
2033 * m * (strlen(longer) - strlen(shorter))
2034 * = x_len_longer - x_len_shorter
2035 * But we have set things up so that 'shorter' is 1 byte smaller
2036 * than 'longer'. Hence:
2037 * m = x_len_longer - x_len_shorter
2038 *
2039 * But if something went wrong, make sure the multiplier is at
2040 * least 1.
2041 */
2042 if (x_len_longer > x_len_shorter) {
2043 PL_collxfrm_mult = (STRLEN) x_len_longer - x_len_shorter;
2044 }
2045 else {
2046 PL_collxfrm_mult = 1;
2047 }
2048
2049 /* mx + b = len
2050 * so: b = len - mx
2051 * but in case something has gone wrong, make sure it is
2052 * non-negative */
2053 base = x_len_longer - PL_collxfrm_mult * (sizeof(longer) - 1);
2054 if (base < 0) {
2055 base = 0;
2056 }
2057
2058 /* Add 1 for the trailing NUL */
2059 PL_collxfrm_base = base + 1;
2060 }
58eebef2 2061
7d4bcc4a
KW
2062# ifdef DEBUGGING
2063
58eebef2
KW
2064 if (DEBUG_L_TEST || debug_initialization) {
2065 PerlIO_printf(Perl_debug_log,
b07929e4
KW
2066 "%s:%d: ?UTF-8 locale=%d; x_len_shorter=%zu, "
2067 "x_len_longer=%zu,"
2068 " collate multipler=%zu, collate base=%zu\n",
58eebef2
KW
2069 __FILE__, __LINE__,
2070 PL_in_utf8_COLLATE_locale,
2071 x_len_shorter, x_len_longer,
2072 PL_collxfrm_mult, PL_collxfrm_base);
2073 }
7d4bcc4a
KW
2074# endif
2075
98994639
HS
2076 }
2077 }
2078
2079#endif /* USE_LOCALE_COLLATE */
7d4bcc4a 2080
98994639
HS
2081}
2082
d36adde0
KW
2083#endif
2084
d2b24094 2085#ifdef WIN32
b8cc575c 2086
6c332036
TC
2087#define USE_WSETLOCALE
2088
2089#ifdef USE_WSETLOCALE
2090
2091STATIC char *
2092S_wrap_wsetlocale(pTHX_ int category, const char *locale) {
2093 wchar_t *wlocale;
2094 wchar_t *wresult;
2095 char *result;
2096
2097 if (locale) {
2098 int req_size =
2099 MultiByteToWideChar(CP_UTF8, 0, locale, -1, NULL, 0);
2100
2101 if (!req_size) {
2102 errno = EINVAL;
2103 return NULL;
2104 }
2105
2106 Newx(wlocale, req_size, wchar_t);
2107 if (!MultiByteToWideChar(CP_UTF8, 0, locale, -1, wlocale, req_size)) {
2108 Safefree(wlocale);
2109 errno = EINVAL;
2110 return NULL;
2111 }
2112 }
2113 else {
2114 wlocale = NULL;
2115 }
2116 wresult = _wsetlocale(category, wlocale);
2117 Safefree(wlocale);
2118 if (wresult) {
2119 int req_size =
2120 WideCharToMultiByte(CP_UTF8, 0, wresult, -1, NULL, 0, NULL, NULL);
2121 Newx(result, req_size, char);
2122 SAVEFREEPV(result); /* is there something better we can do here? */
2123 if (!WideCharToMultiByte(CP_UTF8, 0, wresult, -1,
2124 result, req_size, NULL, NULL)) {
2125 errno = EINVAL;
2126 return NULL;
2127 }
2128 }
2129 else {
2130 result = NULL;
2131 }
2132
2133 return result;
2134}
2135
2136#endif
2137
a4f00dcc 2138STATIC char *
b8cc575c 2139S_win32_setlocale(pTHX_ int category, const char* locale)
b385bb4d
KW
2140{
2141 /* This, for Windows, emulates POSIX setlocale() behavior. There is no
7d4bcc4a
KW
2142 * difference between the two unless the input locale is "", which normally
2143 * means on Windows to get the machine default, which is set via the
2144 * computer's "Regional and Language Options" (or its current equivalent).
2145 * In POSIX, it instead means to find the locale from the user's
2146 * environment. This routine changes the Windows behavior to first look in
2147 * the environment, and, if anything is found, use that instead of going to
2148 * the machine default. If there is no environment override, the machine
2149 * default is used, by calling the real setlocale() with "".
2150 *
2151 * The POSIX behavior is to use the LC_ALL variable if set; otherwise to
2152 * use the particular category's variable if set; otherwise to use the LANG
2153 * variable. */
b385bb4d 2154
175c4cf9 2155 bool override_LC_ALL = FALSE;
89f7b9aa 2156 char * result;
e5f10d49 2157 unsigned int i;
89f7b9aa 2158
b385bb4d 2159 if (locale && strEQ(locale, "")) {
7d4bcc4a
KW
2160
2161# ifdef LC_ALL
2162
b385bb4d
KW
2163 locale = PerlEnv_getenv("LC_ALL");
2164 if (! locale) {
e5f10d49
KW
2165 if (category == LC_ALL) {
2166 override_LC_ALL = TRUE;
2167 }
2168 else {
7d4bcc4a
KW
2169
2170# endif
7d4bcc4a 2171
e5f10d49
KW
2172 for (i = 0; i < NOMINAL_LC_ALL_INDEX; i++) {
2173 if (category == categories[i]) {
2174 locale = PerlEnv_getenv(category_names[i]);
2175 goto found_locale;
2176 }
2177 }
7d4bcc4a 2178
b385bb4d 2179 locale = PerlEnv_getenv("LANG");
481465ea 2180 if (! locale) {
b385bb4d
KW
2181 locale = "";
2182 }
e5f10d49
KW
2183
2184 found_locale: ;
7d4bcc4a
KW
2185
2186# ifdef LC_ALL
2187
e5f10d49 2188 }
b385bb4d 2189 }
7d4bcc4a
KW
2190
2191# endif
2192
b385bb4d
KW
2193 }
2194
6c332036
TC
2195#ifdef USE_WSETLOCALE
2196 result = S_wrap_wsetlocale(aTHX_ category, locale);
2197#else
89f7b9aa 2198 result = setlocale(category, locale);
6c332036 2199#endif
48015184
KW
2200 DEBUG_L(STMT_START {
2201 dSAVE_ERRNO;
2202 PerlIO_printf(Perl_debug_log, "%s:%d: %s\n", __FILE__, __LINE__,
2203 setlocale_debug_string(category, locale, result));
2204 RESTORE_ERRNO;
2205 } STMT_END);
89f7b9aa 2206
481465ea 2207 if (! override_LC_ALL) {
89f7b9aa
KW
2208 return result;
2209 }
2210
dfd77d7a 2211 /* Here the input category was LC_ALL, and we have set it to what is in the
481465ea
KW
2212 * LANG variable or the system default if there is no LANG. But these have
2213 * lower priority than the other LC_foo variables, so override it for each
2214 * one that is set. (If they are set to "", it means to use the same thing
2215 * we just set LC_ALL to, so can skip) */
7d4bcc4a 2216
948523db 2217 for (i = 0; i < LC_ALL_INDEX; i++) {
e5f10d49
KW
2218 result = PerlEnv_getenv(category_names[i]);
2219 if (result && strNE(result, "")) {
6c332036 2220#ifdef USE_WSETLOCALE
17a1e9ac 2221 S_wrap_wsetlocale(aTHX_ categories[i], result);
6c332036 2222#else
17a1e9ac 2223 setlocale(categories[i], result);
6c332036 2224#endif
e5f10d49
KW
2225 DEBUG_Lv(PerlIO_printf(Perl_debug_log, "%s:%d: %s\n",
2226 __FILE__, __LINE__,
2227 setlocale_debug_string(categories[i], result, "not captured")));
2228 }
89f7b9aa 2229 }
7d4bcc4a 2230
bbc98134 2231 result = setlocale(LC_ALL, NULL);
48015184
KW
2232 DEBUG_L(STMT_START {
2233 dSAVE_ERRNO;
2234 PerlIO_printf(Perl_debug_log, "%s:%d: %s\n",
bbc98134 2235 __FILE__, __LINE__,
48015184
KW
2236 setlocale_debug_string(LC_ALL, NULL, result));
2237 RESTORE_ERRNO;
2238 } STMT_END);
89f7b9aa 2239
bbc98134 2240 return result;
b385bb4d
KW
2241}
2242
2243#endif
2244
9aac5db8
KW
2245/*
2246
2247=head1 Locale-related functions and macros
2248
2249=for apidoc Perl_setlocale
2250
2251This is an (almost) drop-in replacement for the system L<C<setlocale(3)>>,
2252taking the same parameters, and returning the same information, except that it
9487427b
KW
2253returns the correct underlying C<LC_NUMERIC> locale. Regular C<setlocale> will
2254instead return C<C> if the underlying locale has a non-dot decimal point
2255character, or a non-empty thousands separator for displaying floating point
2256numbers. This is because perl keeps that locale category such that it has a
2257dot and empty separator, changing the locale briefly during the operations
2258where the underlying one is required. C<Perl_setlocale> knows about this, and
2259compensates; regular C<setlocale> doesn't.
9aac5db8 2260
e9bc6d6b 2261Another reason it isn't completely a drop-in replacement is that it is
9aac5db8 2262declared to return S<C<const char *>>, whereas the system setlocale omits the
163deff3
KW
2263C<const> (presumably because its API was specified long ago, and can't be
2264updated; it is illegal to change the information C<setlocale> returns; doing
2265so leads to segfaults.)
9aac5db8 2266
e9bc6d6b
KW
2267Finally, C<Perl_setlocale> works under all circumstances, whereas plain
2268C<setlocale> can be completely ineffective on some platforms under some
2269configurations.
2270
9aac5db8 2271C<Perl_setlocale> should not be used to change the locale except on systems
e9bc6d6b
KW
2272where the predefined variable C<${^SAFE_LOCALES}> is 1. On some such systems,
2273the system C<setlocale()> is ineffective, returning the wrong information, and
2274failing to actually change the locale. C<Perl_setlocale>, however works
2275properly in all circumstances.
9aac5db8
KW
2276
2277The return points to a per-thread static buffer, which is overwritten the next
2278time C<Perl_setlocale> is called from the same thread.
2279
2280=cut
2281
2282*/
2283
2284const char *
2285Perl_setlocale(const int category, const char * locale)
a4f00dcc
KW
2286{
2287 /* This wraps POSIX::setlocale() */
2288
52129632 2289#ifndef USE_LOCALE
d36adde0
KW
2290
2291 PERL_UNUSED_ARG(category);
2292 PERL_UNUSED_ARG(locale);
2293
2294 return "C";
2295
2296#else
2297
9aac5db8
KW
2298 const char * retval;
2299 const char * newlocale;
2300 dSAVEDERRNO;
a4f00dcc 2301 dTHX;
d36adde0 2302 DECLARATION_FOR_LC_NUMERIC_MANIPULATION;
a4f00dcc 2303
a4f00dcc
KW
2304#ifdef USE_LOCALE_NUMERIC
2305
291a84fb
KW
2306 /* A NULL locale means only query what the current one is. We have the
2307 * LC_NUMERIC name saved, because we are normally switched into the C
9487427b
KW
2308 * (or equivalent) locale for it. For an LC_ALL query, switch back to get
2309 * the correct results. All other categories don't require special
2310 * handling */
a4f00dcc
KW
2311 if (locale == NULL) {
2312 if (category == LC_NUMERIC) {
9aac5db8
KW
2313
2314 /* We don't have to copy this return value, as it is a per-thread
2315 * variable, and won't change until a future setlocale */
2316 return PL_numeric_name;
a4f00dcc
KW
2317 }
2318
7d4bcc4a 2319# ifdef LC_ALL
a4f00dcc 2320
9aac5db8
KW
2321 else if (category == LC_ALL) {
2322 STORE_LC_NUMERIC_FORCE_TO_UNDERLYING();
a4f00dcc
KW
2323 }
2324
7d4bcc4a 2325# endif
a4f00dcc
KW
2326
2327 }
2328
2329#endif
2330
33e5a354
KW
2331 retval = save_to_buffer(do_setlocale_r(category, locale),
2332 &PL_setlocale_buf, &PL_setlocale_bufsize, 0);
9aac5db8
KW
2333 SAVE_ERRNO;
2334
2335#if defined(USE_LOCALE_NUMERIC) && defined(LC_ALL)
2336
2337 if (locale == NULL && category == LC_ALL) {
2338 RESTORE_LC_NUMERIC();
2339 }
2340
2341#endif
a4f00dcc
KW
2342
2343 DEBUG_L(PerlIO_printf(Perl_debug_log,
2344 "%s:%d: %s\n", __FILE__, __LINE__,
2345 setlocale_debug_string(category, locale, retval)));
7d4bcc4a 2346
9aac5db8
KW
2347 RESTORE_ERRNO;
2348
2349 if (! retval) {
a4f00dcc
KW
2350 return NULL;
2351 }
2352
9aac5db8 2353 /* If locale == NULL, we are just querying the state */
a4f00dcc 2354 if (locale == NULL) {
a4f00dcc
KW
2355 return retval;
2356 }
a4f00dcc 2357
1159483a
KW
2358 /* Now that have switched locales, we have to update our records to
2359 * correspond. */
a4f00dcc 2360
1159483a 2361 switch (category) {
a4f00dcc 2362
1159483a 2363#ifdef USE_LOCALE_CTYPE
a4f00dcc 2364
1159483a
KW
2365 case LC_CTYPE:
2366 new_ctype(retval);
2367 break;
a4f00dcc 2368
1159483a 2369#endif
a4f00dcc
KW
2370#ifdef USE_LOCALE_COLLATE
2371
1159483a
KW
2372 case LC_COLLATE:
2373 new_collate(retval);
2374 break;
a4f00dcc 2375
1159483a 2376#endif
a4f00dcc
KW
2377#ifdef USE_LOCALE_NUMERIC
2378
1159483a
KW
2379 case LC_NUMERIC:
2380 new_numeric(retval);
2381 break;
a4f00dcc 2382
1159483a
KW
2383#endif
2384#ifdef LC_ALL
a4f00dcc 2385
1159483a 2386 case LC_ALL:
a4f00dcc 2387
1159483a
KW
2388 /* LC_ALL updates all the things we care about. The values may not
2389 * be the same as 'retval', as the locale "" may have set things
2390 * individually */
a4f00dcc 2391
1159483a 2392# ifdef USE_LOCALE_CTYPE
a4f00dcc 2393
b0bde642 2394 newlocale = savepv(do_setlocale_c(LC_CTYPE, NULL));
1159483a 2395 new_ctype(newlocale);
b0bde642 2396 Safefree(newlocale);
a4f00dcc 2397
1159483a
KW
2398# endif /* USE_LOCALE_CTYPE */
2399# ifdef USE_LOCALE_COLLATE
2400
b0bde642 2401 newlocale = savepv(do_setlocale_c(LC_COLLATE, NULL));
1159483a 2402 new_collate(newlocale);
b0bde642 2403 Safefree(newlocale);
a4f00dcc 2404
7d4bcc4a 2405# endif
1159483a 2406# ifdef USE_LOCALE_NUMERIC
a4f00dcc 2407
b0bde642 2408 newlocale = savepv(do_setlocale_c(LC_NUMERIC, NULL));
1159483a 2409 new_numeric(newlocale);
b0bde642 2410 Safefree(newlocale);
a4f00dcc 2411
1159483a
KW
2412# endif /* USE_LOCALE_NUMERIC */
2413#endif /* LC_ALL */
a4f00dcc 2414
1159483a
KW
2415 default:
2416 break;
a4f00dcc
KW
2417 }
2418
2419 return retval;
2420
d36adde0
KW
2421#endif
2422
f7416781
KW
2423}
2424
2425PERL_STATIC_INLINE const char *
2426S_save_to_buffer(const char * string, char **buf, Size_t *buf_size, const Size_t offset)
2427{
2428 /* Copy the NUL-terminated 'string' to 'buf' + 'offset'. 'buf' has size 'buf_size',
2429 * growing it if necessary */
2430
0b6697c5 2431 Size_t string_size;
f7416781
KW
2432
2433 PERL_ARGS_ASSERT_SAVE_TO_BUFFER;
2434
0b6697c5
KW
2435 if (! string) {
2436 return NULL;
2437 }
2438
2439 string_size = strlen(string) + offset + 1;
2440
f7416781
KW
2441 if (*buf_size == 0) {
2442 Newx(*buf, string_size, char);
2443 *buf_size = string_size;
2444 }
2445 else if (string_size > *buf_size) {
2446 Renew(*buf, string_size, char);
2447 *buf_size = string_size;
2448 }
2449
2450 Copy(string, *buf + offset, string_size - offset, char);
2451 return *buf;
2452}
2453
2454/*
2455
f7416781
KW
2456=for apidoc Perl_langinfo
2457
ce181bf6 2458This is an (almost) drop-in replacement for the system C<L<nl_langinfo(3)>>,
f7416781
KW
2459taking the same C<item> parameter values, and returning the same information.
2460But it is more thread-safe than regular C<nl_langinfo()>, and hides the quirks
2461of Perl's locale handling from your code, and can be used on systems that lack
2462a native C<nl_langinfo>.
2463
2464Expanding on these:
2465
2466=over
2467
2468=item *
2469
ce181bf6
KW
2470The reason it isn't quite a drop-in replacement is actually an advantage. The
2471only difference is that it returns S<C<const char *>>, whereas plain
2472C<nl_langinfo()> returns S<C<char *>>, but you are (only by documentation)
2473forbidden to write into the buffer. By declaring this C<const>, the compiler
2474enforces this restriction, so if it is violated, you know at compilation time,
2475rather than getting segfaults at runtime.
2476
2477=item *
2478
69e2275e 2479It delivers the correct results for the C<RADIXCHAR> and C<THOUSEP> items,
f7416781
KW
2480without you having to write extra code. The reason for the extra code would be
2481because these are from the C<LC_NUMERIC> locale category, which is normally
9487427b
KW
2482kept set by Perl so that the radix is a dot, and the separator is the empty
2483string, no matter what the underlying locale is supposed to be, and so to get
2484the expected results, you have to temporarily toggle into the underlying
2485locale, and later toggle back. (You could use plain C<nl_langinfo> and
2486C<L</STORE_LC_NUMERIC_FORCE_TO_UNDERLYING>> for this but then you wouldn't get
2487the other advantages of C<Perl_langinfo()>; not keeping C<LC_NUMERIC> in the C
2488(or equivalent) locale would break a lot of CPAN, which is expecting the radix
2489(decimal point) character to be a dot.)
ce181bf6
KW
2490
2491=item *
2492
2493The system function it replaces can have its static return buffer trashed,
2494not only by a subesequent call to that function, but by a C<freelocale>,
2495C<setlocale>, or other locale change. The returned buffer of this function is
2496not changed until the next call to it, so the buffer is never in a trashed
2497state.
f7416781
KW
2498
2499=item *
2500
ce181bf6
KW
2501Its return buffer is per-thread, so it also is never overwritten by a call to
2502this function from another thread; unlike the function it replaces.
2503
2504=item *
2505
2506But most importantly, it works on systems that don't have C<nl_langinfo>, such
2507as Windows, hence makes your code more portable. Of the fifty-some possible
2508items specified by the POSIX 2008 standard,
f7416781 2509L<http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/langinfo.h.html>,
8d72e74e
KW
2510only one is completely unimplemented, though on non-Windows platforms, another
2511significant one is also not implemented). It uses various techniques to
2512recover the other items, including calling C<L<localeconv(3)>>, and
2513C<L<strftime(3)>>, both of which are specified in C89, so should be always be
2514available. Later C<strftime()> versions have additional capabilities; C<""> is
2515returned for those not available on your system.
ce181bf6
KW
2516
2517It is important to note that when called with an item that is recovered by
2518using C<localeconv>, the buffer from any previous explicit call to
2519C<localeconv> will be overwritten. This means you must save that buffer's
c3997e39
KW
2520contents if you need to access them after a call to this function. (But note
2521that you might not want to be using C<localeconv()> directly anyway, because of
2522issues like the ones listed in the second item of this list (above) for
2523C<RADIXCHAR> and C<THOUSEP>. You can use the methods given in L<perlcall> to
2524call L<POSIX/localeconv> and avoid all the issues, but then you have a hash to
2525unpack).
9f0bc911 2526
6201c220
KW
2527The details for those items which may deviate from what this emulation returns
2528and what a native C<nl_langinfo()> would return are specified in
2529L<I18N::Langinfo>.
f7416781 2530
ce181bf6
KW
2531=back
2532
f7416781
KW
2533When using C<Perl_langinfo> on systems that don't have a native
2534C<nl_langinfo()>, you must
2535
2536 #include "perl_langinfo.h"
2537
2538before the C<perl.h> C<#include>. You can replace your C<langinfo.h>
2539C<#include> with this one. (Doing it this way keeps out the symbols that plain
c3997e39
KW
2540C<langinfo.h> would try to import into the namespace for code that doesn't need
2541it.)
f7416781 2542
f7416781
KW
2543The original impetus for C<Perl_langinfo()> was so that code that needs to
2544find out the current currency symbol, floating point radix character, or digit
2545grouping separator can use, on all systems, the simpler and more
2546thread-friendly C<nl_langinfo> API instead of C<L<localeconv(3)>> which is a
2547pain to make thread-friendly. For other fields returned by C<localeconv>, it
2548is better to use the methods given in L<perlcall> to call
2549L<C<POSIX::localeconv()>|POSIX/localeconv>, which is thread-friendly.
2550
2551=cut
2552
2553*/
2554
2555const char *
2556#ifdef HAS_NL_LANGINFO
2557Perl_langinfo(const nl_item item)
2558#else
2559Perl_langinfo(const int item)
2560#endif
2561{
f61748ac
KW
2562 return my_nl_langinfo(item, TRUE);
2563}
2564
59a15af0 2565STATIC const char *
f61748ac
KW
2566#ifdef HAS_NL_LANGINFO
2567S_my_nl_langinfo(const nl_item item, bool toggle)
2568#else
2569S_my_nl_langinfo(const int item, bool toggle)
2570#endif
2571{
ae74815b 2572 dTHX;
0b6697c5 2573 const char * retval;
f7416781 2574
d36adde0
KW
2575#ifdef USE_LOCALE_NUMERIC
2576
5a854ab3
KW
2577 /* We only need to toggle into the underlying LC_NUMERIC locale for these
2578 * two items, and only if not already there */
4e6826bf 2579 if (toggle && (( item != RADIXCHAR && item != THOUSEP)
5a854ab3 2580 || PL_numeric_underlying))
d36adde0
KW
2581
2582#endif /* No toggling needed if not using LC_NUMERIC */
2583
5a854ab3 2584 toggle = FALSE;
5a854ab3 2585
ab340fff 2586#if defined(HAS_NL_LANGINFO) /* nl_langinfo() is available. */
ee90eb2d 2587# if ! defined(HAS_THREAD_SAFE_NL_LANGINFO_L) \
80306bb6
KW
2588 || ! defined(HAS_POSIX_2008_LOCALE) \
2589 || ! defined(DUPLOCALE)
f7416781 2590
ab340fff 2591 /* Here, use plain nl_langinfo(), switching to the underlying LC_NUMERIC
ae74815b
KW
2592 * for those items dependent on it. This must be copied to a buffer before
2593 * switching back, as some systems destroy the buffer when setlocale() is
2594 * called */
f7416781 2595
038d3702
KW
2596 {
2597 DECLARATION_FOR_LC_NUMERIC_MANIPULATION;
2598
b2fee59c 2599 if (toggle) {
038d3702 2600 STORE_LC_NUMERIC_FORCE_TO_UNDERLYING();
b2fee59c 2601 }
f7416781 2602
5acc4454
KW
2603 LOCALE_LOCK; /* Prevent interference from another thread executing
2604 this code section (the only call to nl_langinfo in
2605 the core) */
2606
ee90eb2d 2607
628ff75a
KW
2608 /* Copy to a per-thread buffer, which is also one that won't be
2609 * destroyed by a subsequent setlocale(), such as the
2610 * RESTORE_LC_NUMERIC may do just below. */
0b6697c5
KW
2611 retval = save_to_buffer(nl_langinfo(item),
2612 &PL_langinfo_buf, &PL_langinfo_bufsize, 0);
f7416781 2613
5acc4454
KW
2614 LOCALE_UNLOCK;
2615
b2fee59c 2616 if (toggle) {
038d3702 2617 RESTORE_LC_NUMERIC();
b2fee59c 2618 }
f7416781
KW
2619 }
2620
ab340fff
KW
2621# else /* Use nl_langinfo_l(), avoiding both a mutex and changing the locale */
2622
5a854ab3 2623 {
b2fee59c
KW
2624 bool do_free = FALSE;
2625 locale_t cur = uselocale((locale_t) 0);
ab340fff 2626
b2fee59c
KW
2627 if (cur == LC_GLOBAL_LOCALE) {
2628 cur = duplocale(LC_GLOBAL_LOCALE);
2629 do_free = TRUE;
2630 }
ab340fff 2631
d36adde0
KW
2632# ifdef USE_LOCALE_NUMERIC
2633
b2fee59c 2634 if (toggle) {
e1aa2579
KW
2635 if (PL_underlying_numeric_obj) {
2636 cur = PL_underlying_numeric_obj;
2637 }
2638 else {
2639 cur = newlocale(LC_NUMERIC_MASK, PL_numeric_name, cur);
2640 do_free = TRUE;
2641 }
b2fee59c 2642 }
ab340fff 2643
d36adde0
KW
2644# endif
2645
628ff75a
KW
2646 /* We have to save it to a buffer, because the freelocale() just below
2647 * can invalidate the internal one */
0b6697c5
KW
2648 retval = save_to_buffer(nl_langinfo_l(item, cur),
2649 &PL_langinfo_buf, &PL_langinfo_bufsize, 0);
ee90eb2d 2650
b2fee59c
KW
2651 if (do_free) {
2652 freelocale(cur);
2653 }
5a854ab3 2654 }
ab340fff 2655
c1566110
KW
2656# endif
2657
0b6697c5 2658 if (strEQ(retval, "")) {
4e6826bf 2659 if (item == YESSTR) {
c1566110
KW
2660 return "yes";
2661 }
4e6826bf 2662 if (item == NOSTR) {
c1566110
KW
2663 return "no";
2664 }
2665 }
2666
0b6697c5 2667 return retval;
ab340fff 2668
f7416781 2669#else /* Below, emulate nl_langinfo as best we can */
43dd6b15
KW
2670
2671 {
2672
f7416781
KW
2673# ifdef HAS_LOCALECONV
2674
43dd6b15 2675 const struct lconv* lc;
628ff75a 2676 const char * temp;
038d3702 2677 DECLARATION_FOR_LC_NUMERIC_MANIPULATION;
f7416781 2678
69c5e0db
KW
2679# ifdef TS_W32_BROKEN_LOCALECONV
2680
2681 const char * save_global;
2682 const char * save_thread;
2683 int needed_size;
2684 char * ptr;
2685 char * e;
2686 char * item_start;
2687
2688# endif
f7416781
KW
2689# endif
2690# ifdef HAS_STRFTIME
2691
43dd6b15
KW
2692 struct tm tm;
2693 bool return_format = FALSE; /* Return the %format, not the value */
2694 const char * format;
f7416781
KW
2695
2696# endif
2697
43dd6b15
KW
2698 /* We copy the results to a per-thread buffer, even if not
2699 * multi-threaded. This is in part to simplify this code, and partly
2700 * because we need a buffer anyway for strftime(), and partly because a
2701 * call of localeconv() could otherwise wipe out the buffer, and the
2702 * programmer would not be expecting this, as this is a nl_langinfo()
2703 * substitute after all, so s/he might be thinking their localeconv()
2704 * is safe until another localeconv() call. */
f7416781 2705
43dd6b15
KW
2706 switch (item) {
2707 Size_t len;
f7416781 2708
8d72e74e 2709 /* This is unimplemented */
4e6826bf 2710 case ERA: /* For use with strftime() %E modifier */
f7416781 2711
43dd6b15
KW
2712 default:
2713 return "";
f7416781 2714
43dd6b15 2715 /* We use only an English set, since we don't know any more */
4e6826bf
KW
2716 case YESEXPR: return "^[+1yY]";
2717 case YESSTR: return "yes";
2718 case NOEXPR: return "^[-0nN]";
2719 case NOSTR: return "no";
2720
8d72e74e
KW
2721 case CODESET:
2722
2723# ifndef WIN32
2724
2725 /* On non-windows, this is unimplemented, in part because of
2726 * inconsistencies between vendors. The Darwin native
2727 * nl_langinfo() implementation simply looks at everything past
2728 * any dot in the name, but that doesn't work for other
2729 * vendors. Many Linux locales that don't have UTF-8 in their
2730 * names really are UTF-8, for example; z/OS locales that do
2731 * have UTF-8 in their names, aren't really UTF-8 */
2732 return "";
2733
2734# else
2735
2736 { /* But on Windows, the name does seem to be consistent, so
2737 use that. */
2738 const char * p;
2739 const char * first;
2740 Size_t offset = 0;
2741 const char * name = my_setlocale(LC_CTYPE, NULL);
2742
2743 if (isNAME_C_OR_POSIX(name)) {
2744 return "ANSI_X3.4-1968";
2745 }
2746
2747 /* Find the dot in the locale name */
2748 first = (const char *) strchr(name, '.');
2749 if (! first) {
2750 first = name;
2751 goto has_nondigit;
2752 }
2753
2754 /* Look at everything past the dot */
2755 first++;
2756 p = first;
2757
2758 while (*p) {
2759 if (! isDIGIT(*p)) {
2760 goto has_nondigit;
2761 }
2762
2763 p++;
2764 }
2765
2766 /* Here everything past the dot is a digit. Treat it as a
2767 * code page */
18503cbd 2768 retval = save_to_buffer("CP", &PL_langinfo_buf,
32a62865 2769 &PL_langinfo_bufsize, 0);
8d72e74e 2770 offset = STRLENs("CP");
f7416781 2771
8d72e74e
KW
2772 has_nondigit:
2773
2774 retval = save_to_buffer(first, &PL_langinfo_buf,
2775 &PL_langinfo_bufsize, offset);
2776 }
2777
2778 break;
2779
2780# endif
f7416781
KW
2781# ifdef HAS_LOCALECONV
2782
4e6826bf 2783 case CRNCYSTR:
f7416781 2784
43dd6b15
KW
2785 /* We don't bother with localeconv_l() because any system that
2786 * has it is likely to also have nl_langinfo() */
291a84fb 2787
69c5e0db
KW
2788 LOCALE_LOCK_V; /* Prevent interference with other threads
2789 using localeconv() */
2790
2791# ifdef TS_W32_BROKEN_LOCALECONV
2792
2793 /* This is a workaround for a Windows bug prior to VS 15.
2794 * What we do here is, while locked, switch to the global
2795 * locale so localeconv() works; then switch back just before
2796 * the unlock. This can screw things up if some thread is
2797 * already using the global locale while assuming no other is.
2798 * A different workaround would be to call GetCurrencyFormat on
2799 * a known value, and parse it; patches welcome
2800 *
2801 * We have to use LC_ALL instead of LC_MONETARY because of
2802 * another bug in Windows */
2803
2804 save_thread = savepv(my_setlocale(LC_ALL, NULL));
2805 _configthreadlocale(_DISABLE_PER_THREAD_LOCALE);
2806 save_global= savepv(my_setlocale(LC_ALL, NULL));
2807 my_setlocale(LC_ALL, save_thread);
2808
2809# endif
5acc4454 2810
43dd6b15
KW
2811 lc = localeconv();
2812 if ( ! lc
2813 || ! lc->currency_symbol
2814 || strEQ("", lc->currency_symbol))
2815 {
69c5e0db 2816 LOCALE_UNLOCK_V;
43dd6b15
KW
2817 return "";
2818 }
f7416781 2819
43dd6b15 2820 /* Leave the first spot empty to be filled in below */
0b6697c5
KW
2821 retval = save_to_buffer(lc->currency_symbol, &PL_langinfo_buf,
2822 &PL_langinfo_bufsize, 1);
43dd6b15
KW
2823 if (lc->mon_decimal_point && strEQ(lc->mon_decimal_point, ""))
2824 { /* khw couldn't figure out how the localedef specifications
2825 would show that the $ should replace the radix; this is
2826 just a guess as to how it might work.*/
a34edee3 2827 PL_langinfo_buf[0] = '.';
43dd6b15
KW
2828 }
2829 else if (lc->p_cs_precedes) {
a34edee3 2830 PL_langinfo_buf[0] = '-';
43dd6b15
KW
2831 }
2832 else {
a34edee3 2833 PL_langinfo_buf[0] = '+';
43dd6b15 2834 }
f7416781 2835
69c5e0db
KW
2836# ifdef TS_W32_BROKEN_LOCALECONV
2837
2838 my_setlocale(LC_ALL, save_global);
2839 _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
2840 my_setlocale(LC_ALL, save_thread);
2841 Safefree(save_global);
2842 Safefree(save_thread);
2843
2844# endif
2845
2846 LOCALE_UNLOCK_V;
43dd6b15 2847 break;
f7416781 2848
69c5e0db
KW
2849# ifdef TS_W32_BROKEN_LOCALECONV
2850
4e6826bf 2851 case RADIXCHAR:
69c5e0db
KW
2852
2853 /* For this, we output a known simple floating point number to
2854 * a buffer, and parse it, looking for the radix */
2855
2856 if (toggle) {
2857 STORE_LC_NUMERIC_FORCE_TO_UNDERLYING();
2858 }
2859
2860 if (PL_langinfo_bufsize < 10) {
2861 PL_langinfo_bufsize = 10;
2862 Renew(PL_langinfo_buf, PL_langinfo_bufsize, char);
2863 }
2864
2865 needed_size = my_snprintf(PL_langinfo_buf, PL_langinfo_bufsize,
2866 "%.1f", 1.5);
2867 if (needed_size >= (int) PL_langinfo_bufsize) {
2868 PL_langinfo_bufsize = needed_size + 1;
2869 Renew(PL_langinfo_buf, PL_langinfo_bufsize, char);
2870 needed_size = my_snprintf(PL_langinfo_buf, PL_langinfo_bufsize,
2871 "%.1f", 1.5);
2872 assert(needed_size < (int) PL_langinfo_bufsize);
2873 }
2874
2875 ptr = PL_langinfo_buf;
2876 e = PL_langinfo_buf + PL_langinfo_bufsize;
2877
2878 /* Find the '1' */
2879 while (ptr < e && *ptr != '1') {
2880 ptr++;
2881 }
2882 ptr++;
2883
2884 /* Find the '5' */
2885 item_start = ptr;
2886 while (ptr < e && *ptr != '5') {
2887 ptr++;
2888 }
2889
2890 /* Everything in between is the radix string */
2891 if (ptr >= e) {
2892 PL_langinfo_buf[0] = '?';
2893 PL_langinfo_buf[1] = '\0';
2894 }
2895 else {
2896 *ptr = '\0';
2897 Move(item_start, PL_langinfo_buf, ptr - PL_langinfo_buf, char);
2898 }
2899
2900 if (toggle) {
2901 RESTORE_LC_NUMERIC();
2902 }
2903
2904 retval = PL_langinfo_buf;
2905 break;
2906
2907# else
2908
2909 case RADIXCHAR: /* No special handling needed */
2910
2911# endif
2912
4e6826bf 2913 case THOUSEP:
f7416781 2914
43dd6b15 2915 if (toggle) {
038d3702 2916 STORE_LC_NUMERIC_FORCE_TO_UNDERLYING();
c0d737a8 2917 }
f7416781 2918
69c5e0db
KW
2919 LOCALE_LOCK_V; /* Prevent interference with other threads
2920 using localeconv() */
2921
2922# ifdef TS_W32_BROKEN_LOCALECONV
2923
2924 /* This should only be for the thousands separator. A
2925 * different work around would be to use GetNumberFormat on a
2926 * known value and parse the result to find the separator */
2927 save_thread = savepv(my_setlocale(LC_ALL, NULL));
2928 _configthreadlocale(_DISABLE_PER_THREAD_LOCALE);
2929 save_global = savepv(my_setlocale(LC_ALL, NULL));
2930 my_setlocale(LC_ALL, save_thread);
2931# if 0
2932 /* This is the start of code that for broken Windows replaces
2933 * the above and below code, and instead calls
2934 * GetNumberFormat() and then would parse that to find the
2935 * thousands separator. It needs to handle UTF-16 vs -8
2936 * issues. */
2937
2938 needed_size = GetNumberFormatEx(PL_numeric_name, 0, "1234.5", NULL, PL_langinfo_buf, PL_langinfo_bufsize);
2939 DEBUG_L(PerlIO_printf(Perl_debug_log,
2940 "%s: %d: return from GetNumber, count=%d, val=%s\n",
2941 __FILE__, __LINE__, needed_size, PL_langinfo_buf));
2942
2943# endif
2944# endif
5acc4454 2945
43dd6b15
KW
2946 lc = localeconv();
2947 if (! lc) {
628ff75a 2948 temp = "";
33394adc 2949 }
43dd6b15 2950 else {
4e6826bf 2951 temp = (item == RADIXCHAR)
43dd6b15
KW
2952 ? lc->decimal_point
2953 : lc->thousands_sep;
628ff75a
KW
2954 if (! temp) {
2955 temp = "";
43dd6b15
KW
2956 }
2957 }
f7416781 2958
0b6697c5
KW
2959 retval = save_to_buffer(temp, &PL_langinfo_buf,
2960 &PL_langinfo_bufsize, 0);
f7416781 2961
69c5e0db
KW
2962# ifdef TS_W32_BROKEN_LOCALECONV
2963
2964 my_setlocale(LC_ALL, save_global);
2965 _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
2966 my_setlocale(LC_ALL, save_thread);
2967 Safefree(save_global);
2968 Safefree(save_thread);
2969
2970# endif
2971
2972 LOCALE_UNLOCK_V;
5acc4454 2973
43dd6b15 2974 if (toggle) {
038d3702 2975 RESTORE_LC_NUMERIC();
43dd6b15 2976 }
f7416781 2977
43dd6b15 2978 break;
f7416781
KW
2979
2980# endif
2981# ifdef HAS_STRFTIME
2982
43dd6b15
KW
2983 /* These are defined by C89, so we assume that strftime supports
2984 * them, and so are returned unconditionally; they may not be what
2985 * the locale actually says, but should give good enough results
2986 * for someone using them as formats (as opposed to trying to parse
2987 * them to figure out what the locale says). The other format
2988 * items are actually tested to verify they work on the platform */
4e6826bf
KW
2989 case D_FMT: return "%x";
2990 case T_FMT: return "%X";
2991 case D_T_FMT: return "%c";
43dd6b15
KW
2992
2993 /* These formats are only available in later strfmtime's */
4e6826bf 2994 case ERA_D_FMT: case ERA_T_FMT: case ERA_D_T_FMT: case T_FMT_AMPM:
43dd6b15
KW
2995
2996 /* The rest can be gotten from most versions of strftime(). */
4e6826bf
KW
2997 case ABDAY_1: case ABDAY_2: case ABDAY_3:
2998 case ABDAY_4: case ABDAY_5: case ABDAY_6: case ABDAY_7:
2999 case ALT_DIGITS:
3000 case AM_STR: case PM_STR:
3001 case ABMON_1: case ABMON_2: case ABMON_3: case ABMON_4:
3002 case ABMON_5: case ABMON_6: case ABMON_7: case ABMON_8:
3003 case ABMON_9: case ABMON_10: case ABMON_11: case ABMON_12:
3004 case DAY_1: case DAY_2: case DAY_3: case DAY_4:
3005 case DAY_5: case DAY_6: case DAY_7:
3006 case MON_1: case MON_2: case MON_3: case MON_4:
3007 case MON_5: case MON_6: case MON_7: case MON_8:
3008 case MON_9: case MON_10: case MON_11: case MON_12:
43dd6b15
KW
3009
3010 LOCALE_LOCK;
3011
3012 init_tm(&tm); /* Precaution against core dumps */
3013 tm.tm_sec = 30;
3014 tm.tm_min = 30;
3015 tm.tm_hour = 6;
3016 tm.tm_year = 2017 - 1900;
3017 tm.tm_wday = 0;
3018 tm.tm_mon = 0;
3019 switch (item) {
3020 default:
3021 LOCALE_UNLOCK;
3022 Perl_croak(aTHX_
3023 "panic: %s: %d: switch case: %d problem",
3024 __FILE__, __LINE__, item);
3025 NOT_REACHED; /* NOTREACHED */
3026
4e6826bf
KW
3027 case PM_STR: tm.tm_hour = 18;
3028 case AM_STR:
43dd6b15
KW
3029 format = "%p";
3030 break;
3031
4e6826bf
KW
3032 case ABDAY_7: tm.tm_wday++;
3033 case ABDAY_6: tm.tm_wday++;
3034 case ABDAY_5: tm.tm_wday++;
3035 case ABDAY_4: tm.tm_wday++;
3036 case ABDAY_3: tm.tm_wday++;
3037 case ABDAY_2: tm.tm_wday++;
3038 case ABDAY_1:
43dd6b15
KW
3039 format = "%a";
3040 break;
3041
4e6826bf
KW
3042 case DAY_7: tm.tm_wday++;
3043 case DAY_6: tm.tm_wday++;
3044 case DAY_5: tm.tm_wday++;
3045 case DAY_4: tm.tm_wday++;
3046 case DAY_3: tm.tm_wday++;
3047 case DAY_2: tm.tm_wday++;
3048 case DAY_1:
43dd6b15
KW
3049 format = "%A";
3050 break;
3051
4e6826bf
KW
3052 case ABMON_12: tm.tm_mon++;
3053 case ABMON_11: tm.tm_mon++;
3054 case ABMON_10: tm.tm_mon++;
3055 case ABMON_9: tm.tm_mon++;
3056 case ABMON_8: tm.tm_mon++;
3057 case ABMON_7: tm.tm_mon++;
3058 case ABMON_6: tm.tm_mon++;
3059 case ABMON_5: tm.tm_mon++;
3060 case ABMON_4: tm.tm_mon++;
3061 case ABMON_3: tm.tm_mon++;
3062 case ABMON_2: tm.tm_mon++;
3063 case ABMON_1:
43dd6b15
KW
3064 format = "%b";
3065 break;
3066
4e6826bf
KW
3067 case MON_12: tm.tm_mon++;
3068 case MON_11: tm.tm_mon++;
3069 case MON_10: tm.tm_mon++;
3070 case MON_9: tm.tm_mon++;
3071 case MON_8: tm.tm_mon++;
3072 case MON_7: tm.tm_mon++;
3073 case MON_6: tm.tm_mon++;
3074 case MON_5: tm.tm_mon++;
3075 case MON_4: tm.tm_mon++;
3076 case MON_3: tm.tm_mon++;
3077 case MON_2: tm.tm_mon++;
3078 case MON_1:
43dd6b15
KW
3079 format = "%B";
3080 break;
3081
4e6826bf 3082 case T_FMT_AMPM:
43dd6b15
KW
3083 format = "%r";
3084 return_format = TRUE;
3085 break;
3086
4e6826bf 3087 case ERA_D_FMT:
43dd6b15
KW
3088 format = "%Ex";
3089 return_format = TRUE;
3090 break;
3091
4e6826bf 3092 case ERA_T_FMT:
43dd6b15
KW
3093 format = "%EX";
3094 return_format = TRUE;
3095 break;
3096
4e6826bf 3097 case ERA_D_T_FMT:
43dd6b15
KW
3098 format = "%Ec";
3099 return_format = TRUE;
3100 break;
3101
4e6826bf 3102 case ALT_DIGITS:
43dd6b15
KW
3103 tm.tm_wday = 0;
3104 format = "%Ow"; /* Find the alternate digit for 0 */
3105 break;
3106 }
f7416781 3107
43dd6b15
KW
3108 /* We can't use my_strftime() because it doesn't look at
3109 * tm_wday */
3110 while (0 == strftime(PL_langinfo_buf, PL_langinfo_bufsize,
3111 format, &tm))
3112 {
3113 /* A zero return means one of:
3114 * a) there wasn't enough space in PL_langinfo_buf
3115 * b) the format, like a plain %p, returns empty
3116 * c) it was an illegal format, though some
3117 * implementations of strftime will just return the
3118 * illegal format as a plain character sequence.
3119 *
3120 * To quickly test for case 'b)', try again but precede
3121 * the format with a plain character. If that result is
3122 * still empty, the problem is either 'a)' or 'c)' */
3123
3124 Size_t format_size = strlen(format) + 1;
3125 Size_t mod_size = format_size + 1;
3126 char * mod_format;
3127 char * temp_result;
3128
3129 Newx(mod_format, mod_size, char);
3130 Newx(temp_result, PL_langinfo_bufsize, char);
6873aa47 3131 *mod_format = ' ';
43dd6b15
KW
3132 my_strlcpy(mod_format + 1, format, mod_size);
3133 len = strftime(temp_result,
3134 PL_langinfo_bufsize,
3135 mod_format, &tm);
3136 Safefree(mod_format);
3137 Safefree(temp_result);
3138
3139 /* If 'len' is non-zero, it means that we had a case like
3140 * %p which means the current locale doesn't use a.m. or
3141 * p.m., and that is valid */
3142 if (len == 0) {
3143
3144 /* Here, still didn't work. If we get well beyond a
3145 * reasonable size, bail out to prevent an infinite
3146 * loop. */
3147
3148 if (PL_langinfo_bufsize > 100 * format_size) {
3149 *PL_langinfo_buf = '\0';
3150 }
3151 else {
3152 /* Double the buffer size to retry; Add 1 in case
3153 * original was 0, so we aren't stuck at 0. */
3154 PL_langinfo_bufsize *= 2;
3155 PL_langinfo_bufsize++;
3156 Renew(PL_langinfo_buf, PL_langinfo_bufsize, char);
3157 continue;
3158 }
3159 }
f7416781 3160
f7416781 3161 break;
43dd6b15 3162 }
f7416781 3163
43dd6b15
KW
3164 /* Here, we got a result.
3165 *
3166 * If the item is 'ALT_DIGITS', PL_langinfo_buf contains the
3167 * alternate format for wday 0. If the value is the same as
3168 * the normal 0, there isn't an alternate, so clear the buffer.
3169 * */
4e6826bf 3170 if ( item == ALT_DIGITS
43dd6b15
KW
3171 && strEQ(PL_langinfo_buf, "0"))
3172 {
3173 *PL_langinfo_buf = '\0';
3174 }
f7416781 3175
43dd6b15
KW
3176 /* ALT_DIGITS is problematic. Experiments on it showed that
3177 * strftime() did not always work properly when going from
3178 * alt-9 to alt-10. Only a few locales have this item defined,
3179 * and in all of them on Linux that khw was able to find,
3180 * nl_langinfo() merely returned the alt-0 character, possibly
3181 * doubled. Most Unicode digits are in blocks of 10
3182 * consecutive code points, so that is sufficient information
3183 * for those scripts, as we can infer alt-1, alt-2, .... But
3184 * for a Japanese locale, a CJK ideographic 0 is returned, and
3185 * the CJK digits are not in code point order, so you can't
3186 * really infer anything. The localedef for this locale did
3187 * specify the succeeding digits, so that strftime() works
3188 * properly on them, without needing to infer anything. But
3189 * the nl_langinfo() return did not give sufficient information
3190 * for the caller to understand what's going on. So until
3191 * there is evidence that it should work differently, this
3192 * returns the alt-0 string for ALT_DIGITS.
3193 *
3194 * wday was chosen because its range is all a single digit.
3195 * Things like tm_sec have two digits as the minimum: '00' */
f7416781 3196
43dd6b15 3197 LOCALE_UNLOCK;
f7416781 3198
d1b150d9
KW
3199 retval = PL_langinfo_buf;
3200
43dd6b15
KW
3201 /* If to return the format, not the value, overwrite the buffer
3202 * with it. But some strftime()s will keep the original format
3203 * if illegal, so change those to "" */
3204 if (return_format) {
3205 if (strEQ(PL_langinfo_buf, format)) {
f7416781
KW
3206 *PL_langinfo_buf = '\0';
3207 }
43dd6b15 3208 else {
0b6697c5
KW
3209 retval = save_to_buffer(format, &PL_langinfo_buf,
3210 &PL_langinfo_bufsize, 0);
f7416781
KW
3211 }
3212 }
3213
3214 break;
f7416781
KW
3215
3216# endif
3217
43dd6b15 3218 }
f7416781
KW
3219 }
3220
0b6697c5 3221 return retval;
f7416781
KW
3222
3223#endif
3224
a4f00dcc 3225}
b385bb4d 3226
98994639
HS
3227/*
3228 * Initialize locale awareness.
3229 */
3230int
3231Perl_init_i18nl10n(pTHX_ int printwarn)
3232{
0e92a118
KW
3233 /* printwarn is
3234 *
3235 * 0 if not to output warning when setup locale is bad
3236 * 1 if to output warning based on value of PERL_BADLANG
3237 * >1 if to output regardless of PERL_BADLANG
3238 *
3239 * returns
98994639 3240 * 1 = set ok or not applicable,
0e92a118
KW
3241 * 0 = fallback to a locale of lower priority
3242 * -1 = fallback to all locales failed, not even to the C locale
6b058d42
KW
3243 *
3244 * Under -DDEBUGGING, if the environment variable PERL_DEBUG_LOCALE_INIT is
3245 * set, debugging information is output.
3246 *
3247 * This looks more complicated than it is, mainly due to the #ifdefs.
3248 *
3249 * We try to set LC_ALL to the value determined by the environment. If
3250 * there is no LC_ALL on this platform, we try the individual categories we
3251 * know about. If this works, we are done.
3252 *
3253 * But if it doesn't work, we have to do something else. We search the
3254 * environment variables ourselves instead of relying on the system to do
3255 * it. We look at, in order, LC_ALL, LANG, a system default locale (if we
3256 * think there is one), and the ultimate fallback "C". This is all done in
3257 * the same loop as above to avoid duplicating code, but it makes things
7d4bcc4a
KW
3258 * more complex. The 'trial_locales' array is initialized with just one
3259 * element; it causes the behavior described in the paragraph above this to
3260 * happen. If that fails, we add elements to 'trial_locales', and do extra
3261 * loop iterations to cause the behavior described in this paragraph.
6b058d42
KW
3262 *
3263 * On Ultrix, the locale MUST come from the environment, so there is
3264 * preliminary code to set it. I (khw) am not sure that it is necessary,
3265 * and that this couldn't be folded into the loop, but barring any real
3266 * platforms to test on, it's staying as-is
3267 *
3268 * A slight complication is that in embedded Perls, the locale may already
3269 * be set-up, and we don't want to get it from the normal environment
3270 * variables. This is handled by having a special environment variable
3271 * indicate we're in this situation. We simply set setlocale's 2nd
3272 * parameter to be a NULL instead of "". That indicates to setlocale that
3273 * it is not to change anything, but to return the current value,
3274 * effectively initializing perl's db to what the locale already is.
3275 *
3276 * We play the same trick with NULL if a LC_ALL succeeds. We call
3277 * setlocale() on the individual categores with NULL to get their existing
3278 * values for our db, instead of trying to change them.
3279 * */
98994639 3280
1565c085
DM
3281 dVAR;
3282
0e92a118
KW
3283 int ok = 1;
3284
7d4bcc4a
KW
3285#ifndef USE_LOCALE
3286
3287 PERL_UNUSED_ARG(printwarn);
3288
3289#else /* USE_LOCALE */
7d4bcc4a
KW
3290# ifdef __GLIBC__
3291
175c4cf9 3292 const char * const language = savepv(PerlEnv_getenv("LANGUAGE"));
7d4bcc4a
KW
3293
3294# endif
65ebb059 3295
ccd65d51
KW
3296 /* NULL uses the existing already set up locale */
3297 const char * const setlocale_init = (PerlEnv_getenv("PERL_SKIP_LOCALE_INIT"))
3298 ? NULL
3299 : "";
c3fcd832
KW
3300 const char* trial_locales[5]; /* 5 = 1 each for "", LC_ALL, LANG, "", C */
3301 unsigned int trial_locales_count;
175c4cf9
KW
3302 const char * const lc_all = savepv(PerlEnv_getenv("LC_ALL"));
3303 const char * const lang = savepv(PerlEnv_getenv("LANG"));
98994639 3304 bool setlocale_failure = FALSE;
65ebb059 3305 unsigned int i;
175c4cf9
KW
3306
3307 /* A later getenv() could zap this, so only use here */
3308 const char * const bad_lang_use_once = PerlEnv_getenv("PERL_BADLANG");
3309
3310 const bool locwarn = (printwarn > 1
e5f10d49
KW
3311 || ( printwarn
3312 && ( ! bad_lang_use_once
22ff3130 3313 || (
e5f10d49
KW
3314 /* disallow with "" or "0" */
3315 *bad_lang_use_once
3316 && strNE("0", bad_lang_use_once)))));
ea92aad8 3317
291a84fb 3318 /* setlocale() return vals; not copied so must be looked at immediately */
8de4332b 3319 const char * sl_result[NOMINAL_LC_ALL_INDEX + 1];
291a84fb
KW
3320
3321 /* current locale for given category; should have been copied so aren't
3322 * volatile */
8de4332b 3323 const char * curlocales[NOMINAL_LC_ALL_INDEX + 1];
291a84fb 3324
7d4bcc4a
KW
3325# ifdef WIN32
3326
6bce99ee
JH
3327 /* In some systems you can find out the system default locale
3328 * and use that as the fallback locale. */
7d4bcc4a
KW
3329# define SYSTEM_DEFAULT_LOCALE
3330# endif
3331# ifdef SYSTEM_DEFAULT_LOCALE
3332
65ebb059 3333 const char *system_default_locale = NULL;
98994639 3334
7d4bcc4a 3335# endif
948523db
KW
3336
3337# ifndef DEBUGGING
3338# define DEBUG_LOCALE_INIT(a,b,c)
3339# else
7d4bcc4a 3340
8298454c 3341 DEBUG_INITIALIZATION_set(cBOOL(PerlEnv_getenv("PERL_DEBUG_LOCALE_INIT")));
7d4bcc4a
KW
3342
3343# define DEBUG_LOCALE_INIT(category, locale, result) \
2fcc0ca9
KW
3344 STMT_START { \
3345 if (debug_initialization) { \
3346 PerlIO_printf(Perl_debug_log, \
3347 "%s:%d: %s\n", \
3348 __FILE__, __LINE__, \
a4f00dcc 3349 setlocale_debug_string(category, \
2fcc0ca9
KW
3350 locale, \
3351 result)); \
3352 } \
3353 } STMT_END
2fcc0ca9 3354
948523db
KW
3355/* Make sure the parallel arrays are properly set up */
3356# ifdef USE_LOCALE_NUMERIC
3357 assert(categories[LC_NUMERIC_INDEX] == LC_NUMERIC);
3358 assert(strEQ(category_names[LC_NUMERIC_INDEX], "LC_NUMERIC"));
e9bc6d6b
KW
3359# ifdef USE_POSIX_2008_LOCALE
3360 assert(category_masks[LC_NUMERIC_INDEX] == LC_NUMERIC_MASK);
3361# endif
948523db
KW
3362# endif
3363# ifdef USE_LOCALE_CTYPE
3364 assert(categories[LC_CTYPE_INDEX] == LC_CTYPE);
3365 assert(strEQ(category_names[LC_CTYPE_INDEX], "LC_CTYPE"));
e9bc6d6b
KW
3366# ifdef USE_POSIX_2008_LOCALE
3367 assert(category_masks[LC_CTYPE_INDEX] == LC_CTYPE_MASK);
3368# endif
948523db
KW
3369# endif
3370# ifdef USE_LOCALE_COLLATE
3371 assert(categories[LC_COLLATE_INDEX] == LC_COLLATE);
3372 assert(strEQ(category_names[LC_COLLATE_INDEX], "LC_COLLATE"));
e9bc6d6b
KW
3373# ifdef USE_POSIX_2008_LOCALE
3374 assert(category_masks[LC_COLLATE_INDEX] == LC_COLLATE_MASK);
3375# endif
948523db
KW
3376# endif
3377# ifdef USE_LOCALE_TIME
3378 assert(categories[LC_TIME_INDEX] == LC_TIME);
3379 assert(strEQ(category_names[LC_TIME_INDEX], "LC_TIME"));
e9bc6d6b
KW
3380# ifdef USE_POSIX_2008_LOCALE
3381 assert(category_masks[LC_TIME_INDEX] == LC_TIME_MASK);
3382# endif
948523db
KW
3383# endif
3384# ifdef USE_LOCALE_MESSAGES
3385 assert(categories[LC_MESSAGES_INDEX] == LC_MESSAGES);
3386 assert(strEQ(category_names[LC_MESSAGES_INDEX], "LC_MESSAGES"));
e9bc6d6b
KW
3387# ifdef USE_POSIX_2008_LOCALE
3388 assert(category_masks[LC_MESSAGES_INDEX] == LC_MESSAGES_MASK);
3389# endif
948523db
KW
3390# endif
3391# ifdef USE_LOCALE_MONETARY
3392 assert(categories[LC_MONETARY_INDEX] == LC_MONETARY);
3393 assert(strEQ(category_names[LC_MONETARY_INDEX], "LC_MONETARY"));
e9bc6d6b
KW
3394# ifdef USE_POSIX_2008_LOCALE
3395 assert(category_masks[LC_MONETARY_INDEX] == LC_MONETARY_MASK);
3396# endif
948523db 3397# endif
9821811f
KW
3398# ifdef USE_LOCALE_ADDRESS
3399 assert(categories[LC_ADDRESS_INDEX] == LC_ADDRESS);
3400 assert(strEQ(category_names[LC_ADDRESS_INDEX], "LC_ADDRESS"));
e9bc6d6b
KW
3401# ifdef USE_POSIX_2008_LOCALE
3402 assert(category_masks[LC_ADDRESS_INDEX] == LC_ADDRESS_MASK);
3403# endif
9821811f
KW
3404# endif
3405# ifdef USE_LOCALE_IDENTIFICATION
3406 assert(categories[LC_IDENTIFICATION_INDEX] == LC_IDENTIFICATION);
3407 assert(strEQ(category_names[LC_IDENTIFICATION_INDEX], "LC_IDENTIFICATION"));
e9bc6d6b
KW
3408# ifdef USE_POSIX_2008_LOCALE
3409 assert(category_masks[LC_IDENTIFICATION_INDEX] == LC_IDENTIFICATION_MASK);
3410# endif
9821811f
KW
3411# endif
3412# ifdef USE_LOCALE_MEASUREMENT
3413 assert(categories[LC_MEASUREMENT_INDEX] == LC_MEASUREMENT);
3414 assert(strEQ(category_names[LC_MEASUREMENT_INDEX], "LC_MEASUREMENT"));
e9bc6d6b
KW
3415# ifdef USE_POSIX_2008_LOCALE
3416 assert(category_masks[LC_MEASUREMENT_INDEX] == LC_MEASUREMENT_MASK);
3417# endif
9821811f
KW
3418# endif
3419# ifdef USE_LOCALE_PAPER
3420 assert(categories[LC_PAPER_INDEX] == LC_PAPER);
3421 assert(strEQ(category_names[LC_PAPER_INDEX], "LC_PAPER"));
e9bc6d6b
KW
3422# ifdef USE_POSIX_2008_LOCALE
3423 assert(category_masks[LC_PAPER_INDEX] == LC_PAPER_MASK);
3424# endif
9821811f
KW
3425# endif
3426# ifdef USE_LOCALE_TELEPHONE
3427 assert(categories[LC_TELEPHONE_INDEX] == LC_TELEPHONE);
3428 assert(strEQ(category_names[LC_TELEPHONE_INDEX], "LC_TELEPHONE"));
e9bc6d6b
KW
3429# ifdef USE_POSIX_2008_LOCALE
3430 assert(category_masks[LC_TELEPHONE_INDEX] == LC_TELEPHONE_MASK);
3431# endif
9821811f 3432# endif
948523db
KW
3433# ifdef LC_ALL
3434 assert(categories[LC_ALL_INDEX] == LC_ALL);
3435 assert(strEQ(category_names[LC_ALL_INDEX], "LC_ALL"));
3436 assert(NOMINAL_LC_ALL_INDEX == LC_ALL_INDEX);
e9bc6d6b
KW
3437# ifdef USE_POSIX_2008_LOCALE
3438 assert(category_masks[LC_ALL_INDEX] == LC_ALL_MASK);
3439# endif
948523db
KW
3440# endif
3441# endif /* DEBUGGING */
47280b20
KW
3442
3443 /* Initialize the cache of the program's UTF-8ness for the always known
3444 * locales C and POSIX */
3445 my_strlcpy(PL_locale_utf8ness, C_and_POSIX_utf8ness,
3446 sizeof(PL_locale_utf8ness));
3447
e9bc6d6b
KW
3448# ifdef USE_THREAD_SAFE_LOCALE
3449# ifdef WIN32
3450
3451 _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
3452
3453# endif
3454# endif
39e69e77 3455# ifdef USE_POSIX_2008_LOCALE
e9bc6d6b
KW
3456
3457 PL_C_locale_obj = newlocale(LC_ALL_MASK, "C", (locale_t) 0);
3458 if (! PL_C_locale_obj) {
3459 Perl_croak_nocontext(
3460 "panic: Cannot create POSIX 2008 C locale object; errno=%d", errno);
3461 }
3462 if (DEBUG_Lv_TEST || debug_initialization) {
3463 PerlIO_printf(Perl_debug_log, "%s:%d: created C object %p\n", __FILE__, __LINE__, PL_C_locale_obj);
3464 }
3465
3466# endif
3467
78f7c09f
KW
3468# ifdef USE_LOCALE_NUMERIC
3469
3ca88433
KW
3470 PL_numeric_radix_sv = newSVpvs(".");
3471
78f7c09f
KW
3472# endif
3473
e9bc6d6b
KW
3474# if defined(USE_POSIX_2008_LOCALE) && ! defined(HAS_QUERYLOCALE)
3475
3476 /* Initialize our records. If we have POSIX 2008, we have LC_ALL */
3477 do_setlocale_c(LC_ALL, my_setlocale(LC_ALL, NULL));
3478
3479# endif
b56c4436 3480# ifdef LOCALE_ENVIRON_REQUIRED
98994639
HS
3481
3482 /*
3483 * Ultrix setlocale(..., "") fails if there are no environment
3484 * variables from which to get a locale name.
3485 */
3486
b56c4436
KW
3487# ifndef LC_ALL
3488# error Ultrix without LC_ALL not implemented
3489# else
7d4bcc4a 3490
b56c4436
KW
3491 {
3492 bool done = FALSE;
ea92aad8
KW
3493 if (lang) {
3494 sl_result[LC_ALL_INDEX] = do_setlocale_c(LC_ALL, setlocale_init);
3495 DEBUG_LOCALE_INIT(LC_ALL, setlocale_init, sl_result[LC_ALL_INDEX]);
3496 if (sl_result[LC_ALL_INDEX])
3497 done = TRUE;
3498 else
e5f10d49 3499 setlocale_failure = TRUE;
ea92aad8
KW
3500 }
3501 if (! setlocale_failure) {
3502 const char * locale_param;
3503 for (i = 0; i < LC_ALL_INDEX; i++) {
3504 locale_param = (! done && (lang || PerlEnv_getenv(category_names[i])))
3505 ? setlocale_init
3506 : NULL;
3507 sl_result[i] = do_setlocale_r(categories[i], locale_param);
3508 if (! sl_result[i]) {
3509 setlocale_failure = TRUE;
3510 }
3511 DEBUG_LOCALE_INIT(categories[i], locale_param, sl_result[i]);
e5f10d49 3512 }
c835d6be 3513 }
7d4bcc4a
KW
3514 }
3515
3516# endif /* LC_ALL */
e5f10d49 3517# endif /* LOCALE_ENVIRON_REQUIRED */
98994639 3518
65ebb059 3519 /* We try each locale in the list until we get one that works, or exhaust
20a240df
KW
3520 * the list. Normally the loop is executed just once. But if setting the
3521 * locale fails, inside the loop we add fallback trials to the array and so
3522 * will execute the loop multiple times */
c3fcd832
KW
3523 trial_locales[0] = setlocale_init;
3524 trial_locales_count = 1;
7d4bcc4a 3525
65ebb059
KW
3526 for (i= 0; i < trial_locales_count; i++) {
3527 const char * trial_locale = trial_locales[i];
3528
3529 if (i > 0) {
3530
3531 /* XXX This is to preserve old behavior for LOCALE_ENVIRON_REQUIRED
3532 * when i==0, but I (khw) don't think that behavior makes much
3533 * sense */
3534 setlocale_failure = FALSE;
3535
7d4bcc4a 3536# ifdef SYSTEM_DEFAULT_LOCALE
291a84fb 3537# ifdef WIN32 /* Note that assumes Win32 has LC_ALL */
7d4bcc4a 3538
65ebb059
KW
3539 /* On Windows machines, an entry of "" after the 0th means to use
3540 * the system default locale, which we now proceed to get. */
3541 if (strEQ(trial_locale, "")) {
3542 unsigned int j;
3543
3544 /* Note that this may change the locale, but we are going to do
3545 * that anyway just below */
837ce802 3546 system_default_locale = do_setlocale_c(LC_ALL, "");
5d1187d1 3547 DEBUG_LOCALE_INIT(LC_ALL, "", system_default_locale);
65ebb059 3548
7d4bcc4a 3549 /* Skip if invalid or if it's already on the list of locales to
65ebb059
KW
3550 * try */
3551 if (! system_default_locale) {
3552 goto next_iteration;
3553 }
3554 for (j = 0; j < trial_locales_count; j++) {
3555 if (strEQ(system_default_locale, trial_locales[j])) {
3556 goto next_iteration;
3557 }
3558 }
3559
3560 trial_locale = system_default_locale;
3561 }
ec0202b5
KW
3562# else
3563# error SYSTEM_DEFAULT_LOCALE only implemented for Win32
3564# endif
7d4bcc4a 3565# endif /* SYSTEM_DEFAULT_LOCALE */
291a84fb
KW
3566
3567 } /* For i > 0 */
65ebb059 3568
7d4bcc4a
KW
3569# ifdef LC_ALL
3570
948523db
KW
3571 sl_result[LC_ALL_INDEX] = do_setlocale_c(LC_ALL, trial_locale);
3572 DEBUG_LOCALE_INIT(LC_ALL, trial_locale, sl_result[LC_ALL_INDEX]);
3573 if (! sl_result[LC_ALL_INDEX]) {
49c85077 3574 setlocale_failure = TRUE;
7cd8b568
KW
3575 }
3576 else {
3577 /* Since LC_ALL succeeded, it should have changed all the other
3578 * categories it can to its value; so we massage things so that the
3579 * setlocales below just return their category's current values.
3580 * This adequately handles the case in NetBSD where LC_COLLATE may
3581 * not be defined for a locale, and setting it individually will
7d4bcc4a 3582 * fail, whereas setting LC_ALL succeeds, leaving LC_COLLATE set to
7cd8b568
KW
3583 * the POSIX locale. */
3584 trial_locale = NULL;
3585 }
7d4bcc4a
KW
3586
3587# endif /* LC_ALL */
98994639 3588
e5f10d49
KW
3589 if (! setlocale_failure) {
3590 unsigned int j;
3591 for (j = 0; j < NOMINAL_LC_ALL_INDEX; j++) {
3592 curlocales[j]
3593 = savepv(do_setlocale_r(categories[j], trial_locale));
3594 if (! curlocales[j]) {
3595 setlocale_failure = TRUE;
3596 }
3597 DEBUG_LOCALE_INIT(categories[j], trial_locale, curlocales[j]);
3598 }
c835d6be 3599
e5f10d49
KW
3600 if (! setlocale_failure) { /* All succeeded */
3601 break; /* Exit trial_locales loop */
49c85077 3602 }
65ebb059 3603 }
98994639 3604
49c85077
KW
3605 /* Here, something failed; will need to try a fallback. */
3606 ok = 0;
65ebb059 3607
49c85077
KW
3608 if (i == 0) {
3609 unsigned int j;
98994639 3610
65ebb059 3611 if (locwarn) { /* Output failure info only on the first one */
7d4bcc4a
KW
3612
3613# ifdef LC_ALL
98994639 3614
49c85077
KW
3615 PerlIO_printf(Perl_error_log,
3616 "perl: warning: Setting locale failed.\n");
98994639 3617
7d4bcc4a 3618# else /* !LC_ALL */
98994639 3619
49c85077
KW
3620 PerlIO_printf(Perl_error_log,
3621 "perl: warning: Setting locale failed for the categories:\n\t");
7d4bcc4a 3622
e5f10d49
KW
3623 for (j = 0; j < NOMINAL_LC_ALL_INDEX; j++) {
3624 if (! curlocales[j]) {
3625 PerlIO_printf(Perl_error_log, category_names[j]);
3626 }
3627 else {
3628 Safefree(curlocales[j]);
3629 }
3630 }
7d4bcc4a 3631
7d4bcc4a 3632# endif /* LC_ALL */
98994639 3633
49c85077
KW
3634 PerlIO_printf(Perl_error_log,
3635 "perl: warning: Please check that your locale settings:\n");
98994639 3636
7d4bcc4a
KW
3637# ifdef __GLIBC__
3638
49c85077
KW
3639 PerlIO_printf(Perl_error_log,
3640 "\tLANGUAGE = %c%s%c,\n",
3641 language ? '"' : '(',
3642 language ? language : "unset",
3643 language ? '"' : ')');
7d4bcc4a 3644# endif
98994639 3645
49c85077
KW
3646 PerlIO_printf(Perl_error_log,
3647 "\tLC_ALL = %c%s%c,\n",
3648 lc_all ? '"' : '(',
3649 lc_all ? lc_all : "unset",
3650 lc_all ? '"' : ')');
98994639 3651
7d4bcc4a
KW
3652# if defined(USE_ENVIRON_ARRAY)
3653
49c85077 3654 {
cd999af9 3655 char **e;
d5e32b93
KW
3656
3657 /* Look through the environment for any variables of the
3658 * form qr/ ^ LC_ [A-Z]+ = /x, except LC_ALL which was
3659 * already handled above. These are assumed to be locale
3660 * settings. Output them and their values. */
cd999af9 3661 for (e = environ; *e; e++) {
d5e32b93
KW
3662 const STRLEN prefix_len = sizeof("LC_") - 1;
3663 STRLEN uppers_len;
3664
cd999af9 3665 if ( strBEGINs(*e, "LC_")
c8b388b0 3666 && ! strBEGINs(*e, "LC_ALL=")
d5e32b93
KW
3667 && (uppers_len = strspn(*e + prefix_len,
3668 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"))
3669 && ((*e)[prefix_len + uppers_len] == '='))
cd999af9
KW
3670 {
3671 PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
d5e32b93
KW
3672 (int) (prefix_len + uppers_len), *e,
3673 *e + prefix_len + uppers_len + 1);
cd999af9
KW
3674 }
3675 }
49c85077 3676 }
7d4bcc4a
KW
3677
3678# else
3679
49c85077
KW
3680 PerlIO_printf(Perl_error_log,
3681 "\t(possibly more locale environment variables)\n");
7d4bcc4a
KW
3682
3683# endif
98994639 3684
49c85077
KW
3685 PerlIO_printf(Perl_error_log,
3686 "\tLANG = %c%s%c\n",
3687 lang ? '"' : '(',
3688 lang ? lang : "unset",
3689 lang ? '"' : ')');
98994639 3690
49c85077
KW
3691 PerlIO_printf(Perl_error_log,
3692 " are supported and installed on your system.\n");
3693 }
98994639 3694
65ebb059 3695 /* Calculate what fallback locales to try. We have avoided this
f6bab5f6 3696 * until we have to, because failure is quite unlikely. This will
65ebb059
KW
3697 * usually change the upper bound of the loop we are in.
3698 *
3699 * Since the system's default way of setting the locale has not
3700 * found one that works, We use Perl's defined ordering: LC_ALL,
3701 * LANG, and the C locale. We don't try the same locale twice, so
3702 * don't add to the list if already there. (On POSIX systems, the
3703 * LC_ALL element will likely be a repeat of the 0th element "",
6b058d42
KW
3704 * but there's no harm done by doing it explicitly.
3705 *
3706 * Note that this tries the LC_ALL environment variable even on
3707 * systems which have no LC_ALL locale setting. This may or may
3708 * not have been originally intentional, but there's no real need
3709 * to change the behavior. */
65ebb059
KW
3710 if (lc_all) {
3711 for (j = 0; j < trial_locales_count; j++) {
3712 if (strEQ(lc_all, trial_locales[j])) {
3713 goto done_lc_all;
3714 }
3715 }
3716 trial_locales[trial_locales_count++] = lc_all;
3717 }
3718 done_lc_all:
98994639 3719
65ebb059
KW
3720 if (lang) {
3721 for (j = 0; j < trial_locales_count; j++) {
3722 if (strEQ(lang, trial_locales[j])) {
3723 goto done_lang;
3724 }
3725 }
3726 trial_locales[trial_locales_count++] = lang;
3727 }
3728 done_lang:
3729
7d4bcc4a
KW
3730# if defined(WIN32) && defined(LC_ALL)
3731
65ebb059
KW
3732 /* For Windows, we also try the system default locale before "C".
3733 * (If there exists a Windows without LC_ALL we skip this because
3734 * it gets too complicated. For those, the "C" is the next
3735 * fallback possibility). The "" is the same as the 0th element of
3736 * the array, but the code at the loop above knows to treat it
3737 * differently when not the 0th */
3738 trial_locales[trial_locales_count++] = "";
7d4bcc4a
KW
3739
3740# endif
65ebb059
KW
3741
3742 for (j = 0; j < trial_locales_count; j++) {
3743 if (strEQ("C", trial_locales[j])) {
3744 goto done_C;
3745 }
3746 }
3747 trial_locales[trial_locales_count++] = "C";
98994639 3748
65ebb059
KW
3749 done_C: ;
3750 } /* end of first time through the loop */
98994639 3751
7d4bcc4a
KW
3752# ifdef WIN32
3753
65ebb059 3754 next_iteration: ;
7d4bcc4a
KW
3755
3756# endif
65ebb059
KW
3757
3758 } /* end of looping through the trial locales */
3759
3760 if (ok < 1) { /* If we tried to fallback */
3761 const char* msg;
3762 if (! setlocale_failure) { /* fallback succeeded */
3763 msg = "Falling back to";
3764 }
3765 else { /* fallback failed */
e5f10d49 3766 unsigned int j;
98994639 3767
65ebb059
KW
3768 /* We dropped off the end of the loop, so have to decrement i to
3769 * get back to the value the last time through */
3770 i--;
98994639 3771
65ebb059
KW
3772 ok = -1;
3773 msg = "Failed to fall back to";
3774
3775 /* To continue, we should use whatever values we've got */
7d4bcc4a 3776
e5f10d49
KW
3777 for (j = 0; j < NOMINAL_LC_ALL_INDEX; j++) {
3778 Safefree(curlocales[j]);
3779 curlocales[j] = savepv(do_setlocale_r(categories[j], NULL));
3780 DEBUG_LOCALE_INIT(categories[j], NULL, curlocales[j]);
3781 }
65ebb059
KW
3782 }
3783
3784 if (locwarn) {
3785 const char * description;
3786 const char * name = "";
3787 if (strEQ(trial_locales[i], "C")) {
3788 description = "the standard locale";
3789 name = "C";
3790 }
7d4bcc4a
KW
3791
3792# ifdef SYSTEM_DEFAULT_LOCALE
3793
65ebb059
KW
3794 else if (strEQ(trial_locales[i], "")) {
3795 description = "the system default locale";
3796 if (system_default_locale) {
3797 name = system_default_locale;
3798 }
3799 }
7d4bcc4a
KW
3800
3801# endif /* SYSTEM_DEFAULT_LOCALE */
3802
65ebb059
KW
3803 else {
3804 description = "a fallback locale";
3805 name = trial_locales[i];
3806 }
3807 if (name && strNE(name, "")) {
3808 PerlIO_printf(Perl_error_log,
3809 "perl: warning: %s %s (\"%s\").\n", msg, description, name);
3810 }
3811 else {
3812 PerlIO_printf(Perl_error_log,
3813 "perl: warning: %s %s.\n", msg, description);
3814 }
3815 }
3816 } /* End of tried to fallback */
98994639 3817
e5f10d49
KW
3818 /* Done with finding the locales; update our records */
3819
7d4bcc4a
KW
3820# ifdef USE_LOCALE_CTYPE
3821
948523db 3822 new_ctype(curlocales[LC_CTYPE_INDEX]);
98994639 3823
e5f10d49 3824# endif
7d4bcc4a
KW
3825# ifdef USE_LOCALE_COLLATE
3826
948523db 3827 new_collate(curlocales[LC_COLLATE_INDEX]);
98994639 3828
e5f10d49 3829# endif
7d4bcc4a
KW
3830# ifdef USE_LOCALE_NUMERIC
3831
948523db 3832 new_numeric(curlocales[LC_NUMERIC_INDEX]);
e5f10d49
KW
3833
3834# endif
3835
948523db 3836 for (i = 0; i < NOMINAL_LC_ALL_INDEX; i++) {
47280b20 3837
e9bc6d6b 3838# if defined(USE_ITHREADS) && ! defined(USE_THREAD_SAFE_LOCALE)
47280b20
KW
3839
3840 /* This caches whether each category's locale is UTF-8 or not. This
3841 * may involve changing the locale. It is ok to do this at
e9bc6d6b
KW
3842 * initialization time before any threads have started, but not later
3843 * unless thread-safe operations are used.
47280b20
KW
3844 * Caching means that if the program heeds our dictate not to change
3845 * locales in threaded applications, this data will remain valid, and
9de6fe47
KW
3846 * it may get queried without having to change locales. If the
3847 * environment is such that all categories have the same locale, this
3848 * isn't needed, as the code will not change the locale; but this
3849 * handles the uncommon case where the environment has disparate
3850 * locales for the categories */
47280b20
KW
3851 (void) _is_cur_LC_category_utf8(categories[i]);
3852
3853# endif
3854
e5f10d49
KW
3855 Safefree(curlocales[i]);
3856 }
b310b053 3857
7d4bcc4a
KW
3858# if defined(USE_PERLIO) && defined(USE_LOCALE_CTYPE)
3859
49c85077 3860 /* Set PL_utf8locale to TRUE if using PerlIO _and_ the current LC_CTYPE
50bf02bd
KW
3861 * locale is UTF-8. The call to new_ctype() just above has already
3862 * calculated the latter value and saved it in