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Fix up many-reader mutex typedef
[perl5.git] / locale.c
CommitLineData
98994639
HS		 1/* locale.c
2 *
1129b882
NC		 3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 * 2002, 2003, 2005, 2006, 2007, 2008 by Larry Wall and others
98994639
HS		 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
4ac71550
TC		 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"]
98994639
HS		 21 */
22
166f8a29
DM		 23/* utility functions for handling locale-specific stuff like what
24 * character represents the decimal point.
0d071d52 25 *
7d4bcc4a
KW		 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
0d071d52
KW		 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
a9ad02a8
KW		 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'.
e9bc6d6b
KW		 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.
166f8a29
DM		 44 */
45
98994639
HS		 46#include "EXTERN.h"
47#define PERL_IN_LOCALE_C
f7416781 48#include "perl_langinfo.h"
98994639
HS		 49#include "perl.h"
50
a4af207c
JH		 51#include "reentr.h"
52
0dec74cd
KW		 53#ifdef I_WCHAR
54# include <wchar.h>
55#endif
5b64f24c
KW		 56#ifdef I_WCTYPE
57# include <wctype.h>
58#endif
0dec74cd 59
2fcc0ca9
KW		 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 */
8c3a0f6c 63#if ! defined(DEBUGGING)
5a4b0634
KW		 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)
2fcc0ca9
KW		 69#endif
70
48015184
KW		 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
291a84fb
KW		 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 */
ff1b739b
KW		 80#define STRLENs(s) (sizeof("" s "") - 1)
81
63e5b0d7
KW		 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
8ef6e574
KW		 97#ifdef USE_LOCALE
98
47280b20
KW		 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 *
47280b20
KW		 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
98994639
HS		 122STATIC char *
123S_stdize_locale(pTHX_ char *locs)
124{
47280b20
KW		 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, '=');
98994639
HS		 140 bool okay = TRUE;
141
7918f24d
NC		 142 PERL_ARGS_ASSERT_STDIZE_LOCALE;
143
8772537c
AL		 144 if (s) {
145 const char * const t = strchr(s, '.');
98994639 146 okay = FALSE;
8772537c
AL		 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;
98994639
HS		 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
e5f10d49
KW		 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
9821811f
KW		 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
36dbc955
KW		 203# ifdef USE_LOCALE_SYNTAX
204 LC_SYNTAX,
205# endif
206# ifdef USE_LOCALE_TOD
207 LC_TOD,
208# endif
e5f10d49
KW		 209# ifdef LC_ALL
210 LC_ALL,
211# endif
212 -1 /* Placeholder because C doesn't allow a
213 trailing comma, and it would get complicated
214 with all the #ifdef's */
215};
216
217/* The top-most real element is LC_ALL */
218
4ef8bdf9 219const char * const category_names[] = {
e5f10d49
KW		 220
221# ifdef USE_LOCALE_NUMERIC
222 "LC_NUMERIC",
223# endif
224# ifdef USE_LOCALE_CTYPE
225 "LC_CTYPE",
226# endif
227# ifdef USE_LOCALE_COLLATE
228 "LC_COLLATE",
229# endif
230# ifdef USE_LOCALE_TIME
231 "LC_TIME",
232# endif
233# ifdef USE_LOCALE_MESSAGES
234 "LC_MESSAGES",
235# endif
236# ifdef USE_LOCALE_MONETARY
237 "LC_MONETARY",
238# endif
9821811f
KW		 239# ifdef USE_LOCALE_ADDRESS
240 "LC_ADDRESS",
241# endif
242# ifdef USE_LOCALE_IDENTIFICATION
243 "LC_IDENTIFICATION",
244# endif
245# ifdef USE_LOCALE_MEASUREMENT
246 "LC_MEASUREMENT",
247# endif
248# ifdef USE_LOCALE_PAPER
249 "LC_PAPER",
250# endif
251# ifdef USE_LOCALE_TELEPHONE
252 "LC_TELEPHONE",
253# endif
36dbc955
KW		 254# ifdef USE_LOCALE_SYNTAX
255 "LC_SYNTAX",
256# endif
257# ifdef USE_LOCALE_TOD
258 "LC_TOD",
259# endif
e5f10d49
KW		 260# ifdef LC_ALL
261 "LC_ALL",
262# endif
263 NULL /* Placeholder */
264 };
265
266# ifdef LC_ALL
267
268 /* On systems with LC_ALL, it is kept in the highest index position. (-2
269 * to account for the final unused placeholder element.) */
270# define NOMINAL_LC_ALL_INDEX (C_ARRAY_LENGTH(categories) - 2)
271
272# else
273
274 /* On systems without LC_ALL, we pretend it is there, one beyond the real
275 * top element, hence in the unused placeholder element. */
276# define NOMINAL_LC_ALL_INDEX (C_ARRAY_LENGTH(categories) - 1)
277
278# endif
279
280/* Pretending there is an LC_ALL element just above allows us to avoid most
281 * special cases. Most loops through these arrays in the code below are
282 * written like 'for (i = 0; i < NOMINAL_LC_ALL_INDEX; i++)'. They will work
283 * on either type of system. But the code must be written to not access the
948523db
KW		 284 * element at 'LC_ALL_INDEX' except on platforms that have it. This can be
285 * checked for at compile time by using the #define LC_ALL_INDEX which is only
286 * defined if we do have LC_ALL. */
e5f10d49 287
b09aaf40
KW		 288STATIC const char *
289S_category_name(const int category)
290{
291 unsigned int i;
292
293#ifdef LC_ALL
294
295 if (category == LC_ALL) {
296 return "LC_ALL";
297 }
298
299#endif
300
301 for (i = 0; i < NOMINAL_LC_ALL_INDEX; i++) {
302 if (category == categories[i]) {
303 return category_names[i];
304 }
305 }
306
307 {
308 const char suffix[] = " (unknown)";
309 int temp = category;
310 Size_t length = sizeof(suffix) + 1;
311 char * unknown;
312 dTHX;
313
314 if (temp < 0) {
315 length++;
316 temp = - temp;
317 }
318
319 /* Calculate the number of digits */
320 while (temp >= 10) {
321 temp /= 10;
322 length++;
323 }
324
325 Newx(unknown, length, char);
326 my_snprintf(unknown, length, "%d%s", category, suffix);
327 SAVEFREEPV(unknown);
328 return unknown;
329 }
330}
331
948523db
KW		 332/* Now create LC_foo_INDEX #defines for just those categories on this system */
333# ifdef USE_LOCALE_NUMERIC
334# define LC_NUMERIC_INDEX 0
335# define _DUMMY_NUMERIC LC_NUMERIC_INDEX
336# else
337# define _DUMMY_NUMERIC -1
338# endif
339# ifdef USE_LOCALE_CTYPE
340# define LC_CTYPE_INDEX _DUMMY_NUMERIC + 1
341# define _DUMMY_CTYPE LC_CTYPE_INDEX
342# else
343# define _DUMMY_CTYPE _DUMMY_NUMERIC
344# endif
345# ifdef USE_LOCALE_COLLATE
346# define LC_COLLATE_INDEX _DUMMY_CTYPE + 1
347# define _DUMMY_COLLATE LC_COLLATE_INDEX
348# else
8203b3c3 349# define _DUMMY_COLLATE _DUMMY_CTYPE
948523db
KW		 350# endif
351# ifdef USE_LOCALE_TIME
352# define LC_TIME_INDEX _DUMMY_COLLATE + 1
353# define _DUMMY_TIME LC_TIME_INDEX
354# else
355# define _DUMMY_TIME _DUMMY_COLLATE
356# endif
357# ifdef USE_LOCALE_MESSAGES
358# define LC_MESSAGES_INDEX _DUMMY_TIME + 1
359# define _DUMMY_MESSAGES LC_MESSAGES_INDEX
360# else
361# define _DUMMY_MESSAGES _DUMMY_TIME
362# endif
363# ifdef USE_LOCALE_MONETARY
364# define LC_MONETARY_INDEX _DUMMY_MESSAGES + 1
365# define _DUMMY_MONETARY LC_MONETARY_INDEX
366# else
367# define _DUMMY_MONETARY _DUMMY_MESSAGES
368# endif
9821811f
KW		 369# ifdef USE_LOCALE_ADDRESS
370# define LC_ADDRESS_INDEX _DUMMY_MONETARY + 1
371# define _DUMMY_ADDRESS LC_ADDRESS_INDEX
372# else
373# define _DUMMY_ADDRESS _DUMMY_MONETARY
374# endif
375# ifdef USE_LOCALE_IDENTIFICATION
376# define LC_IDENTIFICATION_INDEX _DUMMY_ADDRESS + 1
377# define _DUMMY_IDENTIFICATION LC_IDENTIFICATION_INDEX
378# else
379# define _DUMMY_IDENTIFICATION _DUMMY_ADDRESS
380# endif
381# ifdef USE_LOCALE_MEASUREMENT
382# define LC_MEASUREMENT_INDEX _DUMMY_IDENTIFICATION + 1
383# define _DUMMY_MEASUREMENT LC_MEASUREMENT_INDEX
384# else
385# define _DUMMY_MEASUREMENT _DUMMY_IDENTIFICATION
386# endif
387# ifdef USE_LOCALE_PAPER
388# define LC_PAPER_INDEX _DUMMY_MEASUREMENT + 1
389# define _DUMMY_PAPER LC_PAPER_INDEX
390# else
391# define _DUMMY_PAPER _DUMMY_MEASUREMENT
392# endif
393# ifdef USE_LOCALE_TELEPHONE
394# define LC_TELEPHONE_INDEX _DUMMY_PAPER + 1
395# define _DUMMY_TELEPHONE LC_TELEPHONE_INDEX
396# else
397# define _DUMMY_TELEPHONE _DUMMY_PAPER
398# endif
36dbc955
KW		 399# ifdef USE_LOCALE_SYNTAX
400# define LC_SYNTAX_INDEX _DUMMY_TELEPHONE + 1
401# define _DUMMY_SYNTAX LC_SYNTAX_INDEX
402# else
403# define _DUMMY_SYNTAX _DUMMY_TELEPHONE
404# endif
405# ifdef USE_LOCALE_TOD
406# define LC_TOD_INDEX _DUMMY_SYNTAX + 1
407# define _DUMMY_TOD LC_TOD_INDEX
408# else
409# define _DUMMY_TOD _DUMMY_SYNTAX
410# endif
948523db 411# ifdef LC_ALL
36dbc955 412# define LC_ALL_INDEX _DUMMY_TOD + 1
948523db
KW		 413# endif
414#endif /* ifdef USE_LOCALE */
8ef6e574 415
d2b24094 416/* Windows requres a customized base-level setlocale() */
e9bc6d6b
KW		 417#ifdef WIN32
418# define my_setlocale(cat, locale) win32_setlocale(cat, locale)
419#else
420# define my_setlocale(cat, locale) setlocale(cat, locale)
421#endif
422
423#ifndef USE_POSIX_2008_LOCALE
424
425/* "do_setlocale_c" is intended to be called when the category is a constant
426 * known at compile time; "do_setlocale_r", not known until run time */
427# define do_setlocale_c(cat, locale) my_setlocale(cat, locale)
428# define do_setlocale_r(cat, locale) my_setlocale(cat, locale)
45cef8fb 429# define FIX_GLIBC_LC_MESSAGES_BUG(i)
e9bc6d6b
KW		 430
431#else /* Below uses POSIX 2008 */
432
433/* We emulate setlocale with our own function. LC_foo is not valid for the
434 * POSIX 2008 functions. Instead LC_foo_MASK is used, which we use an array
435 * lookup to convert to. At compile time we have defined LC_foo_INDEX as the
436 * proper offset into the array 'category_masks[]'. At runtime, we have to
437 * search through the array (as the actual numbers may not be small contiguous
438 * positive integers which would lend themselves to array lookup). */
439# define do_setlocale_c(cat, locale) \
440 emulate_setlocale(cat, locale, cat ## _INDEX, TRUE)
441# define do_setlocale_r(cat, locale) emulate_setlocale(cat, locale, 0, FALSE)
442
45cef8fb
KW		 443# if ! defined(__GLIBC__) || ! defined(USE_LOCALE_MESSAGES)
444
445# define FIX_GLIBC_LC_MESSAGES_BUG(i)
446
447# else /* Invalidate glibc cache of loaded translations, see [perl #134264] */
448
449# include <libintl.h>
450# define FIX_GLIBC_LC_MESSAGES_BUG(i) \
451 STMT_START { \
452 if ((i) == LC_MESSAGES_INDEX) { \
453 textdomain(textdomain(NULL)); \
454 } \
455 } STMT_END
456
457# endif
458
e9bc6d6b
KW		 459/* A third array, parallel to the ones above to map from category to its
460 * equivalent mask */
461const int category_masks[] = {
462# ifdef USE_LOCALE_NUMERIC
463 LC_NUMERIC_MASK,
464# endif
465# ifdef USE_LOCALE_CTYPE
466 LC_CTYPE_MASK,
467# endif
468# ifdef USE_LOCALE_COLLATE
469 LC_COLLATE_MASK,
470# endif
471# ifdef USE_LOCALE_TIME
472 LC_TIME_MASK,
473# endif
474# ifdef USE_LOCALE_MESSAGES
475 LC_MESSAGES_MASK,
476# endif
477# ifdef USE_LOCALE_MONETARY
478 LC_MONETARY_MASK,
479# endif
480# ifdef USE_LOCALE_ADDRESS
481 LC_ADDRESS_MASK,
482# endif
483# ifdef USE_LOCALE_IDENTIFICATION
484 LC_IDENTIFICATION_MASK,
485# endif
486# ifdef USE_LOCALE_MEASUREMENT
487 LC_MEASUREMENT_MASK,
488# endif
489# ifdef USE_LOCALE_PAPER
490 LC_PAPER_MASK,
491# endif
492# ifdef USE_LOCALE_TELEPHONE
493 LC_TELEPHONE_MASK,
494# endif
36dbc955
KW		 495# ifdef USE_LOCALE_SYNTAX
496 LC_SYNTAX_MASK,
497# endif
498# ifdef USE_LOCALE_TOD
499 LC_TOD_MASK,
500# endif
e9bc6d6b
KW		 501 /* LC_ALL can't be turned off by a Configure
502 * option, and in Posix 2008, should always be
503 * here, so compile it in unconditionally.
504 * This could catch some glitches at compile
505 * time */
506 LC_ALL_MASK
507 };
508
509STATIC const char *
510S_emulate_setlocale(const int category,
511 const char * locale,
512 unsigned int index,
513 const bool is_index_valid
514 )
515{
516 /* This function effectively performs a setlocale() on just the current
517 * thread; thus it is thread-safe. It does this by using the POSIX 2008
518 * locale functions to emulate the behavior of setlocale(). Similar to
519 * regular setlocale(), the return from this function points to memory that
520 * can be overwritten by other system calls, so needs to be copied
521 * immediately if you need to retain it. The difference here is that
522 * system calls besides another setlocale() can overwrite it.
523 *
524 * By doing this, most locale-sensitive functions become thread-safe. The
525 * exceptions are mostly those that return a pointer to static memory.
526 *
527 * This function takes the same parameters, 'category' and 'locale', that
528 * the regular setlocale() function does, but it also takes two additional
529 * ones. This is because the 2008 functions don't use a category; instead
530 * they use a corresponding mask. Because this function operates in both
531 * worlds, it may need one or the other or both. This function can
532 * calculate the mask from the input category, but to avoid this
533 * calculation, if the caller knows at compile time what the mask is, it
534 * can pass it, setting 'is_index_valid' to TRUE; otherwise the mask
535 * parameter is ignored.
536 *
537 * POSIX 2008, for some sick reason, chose not to provide a method to find
538 * the category name of a locale. Some vendors have created a
539 * querylocale() function to do just that. This function is a lot simpler
540 * to implement on systems that have this. Otherwise, we have to keep
541 * track of what the locale has been set to, so that we can return its
542 * name to emulate setlocale(). It's also possible for C code in some
543 * library to change the locale without us knowing it, though as of
544 * September 2017, there are no occurrences in CPAN of uselocale(). Some
545 * libraries do use setlocale(), but that changes the global locale, and
546 * threads using per-thread locales will just ignore those changes.
547 * Another problem is that without querylocale(), we have to guess at what
548 * was meant by setting a locale of "". We handle this by not actually
549 * ever setting to "" (unless querylocale exists), but to emulate what we
550 * think should happen for "".
551 */
552
553 int mask;
554 locale_t old_obj;
555 locale_t new_obj;
556 dTHX;
557
558# ifdef DEBUGGING
559
560 if (DEBUG_Lv_TEST || debug_initialization) {
561 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);
562 }
563
564# endif
565
566 /* If the input mask might be incorrect, calculate the correct one */
567 if (! is_index_valid) {
568 unsigned int i;
569
570# ifdef DEBUGGING
571
572 if (DEBUG_Lv_TEST || debug_initialization) {
573 PerlIO_printf(Perl_debug_log, "%s:%d: finding index of category %d (%s)\n", __FILE__, __LINE__, category, category_name(category));
574 }
575
576# endif
577
578 for (i = 0; i <= LC_ALL_INDEX; i++) {
579 if (category == categories[i]) {
580 index = i;
581 goto found_index;
582 }
583 }
584
585 /* Here, we don't know about this category, so can't handle it.
586 * Fallback to the early POSIX usages */
587 Perl_warner(aTHX_ packWARN(WARN_LOCALE),
588 "Unknown locale category %d; can't set it to %s\n",
589 category, locale);
590 return NULL;
591
592 found_index: ;
593
594# ifdef DEBUGGING
595
596 if (DEBUG_Lv_TEST || debug_initialization) {
597 PerlIO_printf(Perl_debug_log, "%s:%d: index is %d for %s\n", __FILE__, __LINE__, index, category_name(category));
598 }
599
600# endif
601
602 }
603
604 mask = category_masks[index];
605
606# ifdef DEBUGGING
607
608 if (DEBUG_Lv_TEST || debug_initialization) {
609 PerlIO_printf(Perl_debug_log, "%s:%d: category name is %s; mask is 0x%x\n", __FILE__, __LINE__, category_names[index], mask);
610 }
611
612# endif
613
614 /* If just querying what the existing locale is ... */
615 if (locale == NULL) {
616 locale_t cur_obj = uselocale((locale_t) 0);
617
618# ifdef DEBUGGING
619
620 if (DEBUG_Lv_TEST || debug_initialization) {
621 PerlIO_printf(Perl_debug_log, "%s:%d: emulate_setlocale querying %p\n", __FILE__, __LINE__, cur_obj);
622 }
623
624# endif
625
626 if (cur_obj == LC_GLOBAL_LOCALE) {
627 return my_setlocale(category, NULL);
628 }
629
630# ifdef HAS_QUERYLOCALE
631
632 return (char *) querylocale(mask, cur_obj);
633
d2b24094 634# else
ecdda939
KW		 635
636 /* If this assert fails, adjust the size of curlocales in intrpvar.h */
637 STATIC_ASSERT_STMT(C_ARRAY_LENGTH(PL_curlocales) > LC_ALL_INDEX);
638
f33fd0eb
KW		 639# if defined(_NL_LOCALE_NAME) \
640 && defined(DEBUGGING) \
641 /* On systems that accept any locale name, the real underlying \
642 * locale is often returned by this internal function, so we \
643 * can't use it */ \
8e13243a 644 && ! defined(SETLOCALE_ACCEPTS_ANY_LOCALE_NAME)
e9bc6d6b
KW		 645 {
646 /* Internal glibc for querylocale(), but doesn't handle
647 * empty-string ("") locale properly; who knows what other
3a732259 648 * glitches. Check for it now, under debug. */
e9bc6d6b
KW		 649
650 char * temp_name = nl_langinfo_l(_NL_LOCALE_NAME(category),
651 uselocale((locale_t) 0));
652 /*
653 PerlIO_printf(Perl_debug_log, "%s:%d: temp_name=%s\n", __FILE__, __LINE__, temp_name ? temp_name : "NULL");
654 PerlIO_printf(Perl_debug_log, "%s:%d: index=%d\n", __FILE__, __LINE__, index);
655 PerlIO_printf(Perl_debug_log, "%s:%d: PL_curlocales[index]=%s\n", __FILE__, __LINE__, PL_curlocales[index]);
656 */
657 if (temp_name && PL_curlocales[index] && strNE(temp_name, "")) {
658 if ( strNE(PL_curlocales[index], temp_name)
659 && ! ( isNAME_C_OR_POSIX(temp_name)
660 && isNAME_C_OR_POSIX(PL_curlocales[index]))) {
661
662# ifdef USE_C_BACKTRACE
663
664 dump_c_backtrace(Perl_debug_log, 20, 1);
665
666# endif
667
668 Perl_croak(aTHX_ "panic: Mismatch between what Perl thinks %s is"
669 " (%s) and what internal glibc thinks"
670 " (%s)\n", category_names[index],
671 PL_curlocales[index], temp_name);
672 }
673
674 return temp_name;
675 }
676 }
677
678# endif
679
680 /* Without querylocale(), we have to use our record-keeping we've
681 * done. */
682
683 if (category != LC_ALL) {
684
685# ifdef DEBUGGING
686
687 if (DEBUG_Lv_TEST || debug_initialization) {
688 PerlIO_printf(Perl_debug_log, "%s:%d: emulate_setlocale returning %s\n", __FILE__, __LINE__, PL_curlocales[index]);
689 }
690
691# endif
692
693 return PL_curlocales[index];
694 }
695 else { /* For LC_ALL */
696 unsigned int i;
697 Size_t names_len = 0;
698 char * all_string;
7c93a471 699 bool are_all_categories_the_same_locale = TRUE;
e9bc6d6b
KW		 700
701 /* If we have a valid LC_ALL value, just return it */
702 if (PL_curlocales[LC_ALL_INDEX]) {
703
704# ifdef DEBUGGING
705
706 if (DEBUG_Lv_TEST || debug_initialization) {
707 PerlIO_printf(Perl_debug_log, "%s:%d: emulate_setlocale returning %s\n", __FILE__, __LINE__, PL_curlocales[LC_ALL_INDEX]);
708 }
709
710# endif
711
712 return PL_curlocales[LC_ALL_INDEX];
713 }
714
715 /* Otherwise, we need to construct a string of name=value pairs.
716 * We use the glibc syntax, like
717 * LC_NUMERIC=C;LC_TIME=en_US.UTF-8;...
7c93a471
KW		 718 * First calculate the needed size. Along the way, check if all
719 * the locale names are the same */
e9bc6d6b
KW		 720 for (i = 0; i < LC_ALL_INDEX; i++) {
721
722# ifdef DEBUGGING
723
724 if (DEBUG_Lv_TEST || debug_initialization) {
725 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]);
726 }
727
728# endif
729
730 names_len += strlen(category_names[i])
731 + 1 /* '=' */
732 + strlen(PL_curlocales[i])
733 + 1; /* ';' */
7c93a471
KW		 734
735 if (i > 0 && strNE(PL_curlocales[i], PL_curlocales[i-1])) {
736 are_all_categories_the_same_locale = FALSE;
737 }
738 }
739
740 /* If they are the same, we don't actually have to construct the
741 * string; we just make the entry in LC_ALL_INDEX valid, and be
742 * that single name */
743 if (are_all_categories_the_same_locale) {
744 PL_curlocales[LC_ALL_INDEX] = savepv(PL_curlocales[0]);
745 return PL_curlocales[LC_ALL_INDEX];
e9bc6d6b 746 }
7c93a471 747
e9bc6d6b
KW		 748 names_len++; /* Trailing '\0' */
749 SAVEFREEPV(Newx(all_string, names_len, char));
750 *all_string = '\0';
751
752 /* Then fill in the string */
753 for (i = 0; i < LC_ALL_INDEX; i++) {
754
755# ifdef DEBUGGING
756
757 if (DEBUG_Lv_TEST || debug_initialization) {
758 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]);
759 }
760
761# endif
762
763 my_strlcat(all_string, category_names[i], names_len);
764 my_strlcat(all_string, "=", names_len);
765 my_strlcat(all_string, PL_curlocales[i], names_len);
766 my_strlcat(all_string, ";", names_len);
767 }
768
769# ifdef DEBUGGING
770
771 if (DEBUG_L_TEST || debug_initialization) {
772 PerlIO_printf(Perl_debug_log, "%s:%d: emulate_setlocale returning %s\n", __FILE__, __LINE__, all_string);
773 }
774
775 #endif
776
777 return all_string;
778 }
779
780# ifdef EINVAL
781
782 SETERRNO(EINVAL, LIB_INVARG);
783
784# endif
785
786 return NULL;
787
d2b24094
KW		 788# endif
789
6aba5c5e 790 } /* End of this being setlocale(LC_foo, NULL) */
e9bc6d6b 791
f8115d60 792 /* Here, we are switching locales. */
e9bc6d6b
KW		 793
794# ifndef HAS_QUERYLOCALE
795
796 if (strEQ(locale, "")) {
797
798 /* For non-querylocale() systems, we do the setting of "" ourselves to
799 * be sure that we really know what's going on. We follow the Linux
800 * documented behavior (but if that differs from the actual behavior,
801 * this won't work exactly as the OS implements). We go out and
802 * examine the environment based on our understanding of how the system
803 * works, and use that to figure things out */
804
805 const char * const lc_all = PerlEnv_getenv("LC_ALL");
806
807 /* Use any "LC_ALL" environment variable, as it overrides everything
808 * else. */
809 if (lc_all && strNE(lc_all, "")) {
810 locale = lc_all;
811 }
812 else {
813
814 /* Otherwise, we need to dig deeper. Unless overridden, the
815 * default is the LANG environment variable; if it doesn't exist,
816 * then "C" */
817
818 const char * default_name;
819
207cc8df 820 default_name = PerlEnv_getenv("LANG");
e9bc6d6b
KW		 821
822 if (! default_name || strEQ(default_name, "")) {
929a7f8c 823 default_name = "C";
e9bc6d6b 824 }
e9bc6d6b
KW		 825
826 if (category != LC_ALL) {
827 const char * const name = PerlEnv_getenv(category_names[index]);
828
829 /* Here we are setting a single category. Assume will have the
830 * default name */
831 locale = default_name;
832
833 /* But then look for an overriding environment variable */
834 if (name && strNE(name, "")) {
835 locale = name;
836 }
837 }
838 else {
839 bool did_override = FALSE;
840 unsigned int i;
841
842 /* Here, we are getting LC_ALL. Any categories that don't have
843 * a corresponding environment variable set should be set to
844 * LANG, or to "C" if there is no LANG. If no individual
845 * categories differ from this, we can just set LC_ALL. This
846 * is buggy on systems that have extra categories that we don't
847 * know about. If there is an environment variable that sets
848 * that category, we won't know to look for it, and so our use
849 * of LANG or "C" improperly overrides it. On the other hand,
850 * if we don't do what is done here, and there is no
851 * environment variable, the category's locale should be set to
852 * LANG or "C". So there is no good solution. khw thinks the
853 * best is to look at systems to see what categories they have,
854 * and include them, and then to assume that we know the
855 * complete set */
856
857 for (i = 0; i < LC_ALL_INDEX; i++) {
858 const char * const env_override
24f3e849 859 = PerlEnv_getenv(category_names[i]);
e9bc6d6b
KW		 860 const char * this_locale = ( env_override
861 && strNE(env_override, ""))
862 ? env_override
863 : default_name;
6435f98d
KW		 864 if (! emulate_setlocale(categories[i], this_locale, i, TRUE))
865 {
6435f98d
KW		 866 return NULL;
867 }
e9bc6d6b
KW		 868
869 if (strNE(this_locale, default_name)) {
870 did_override = TRUE;
871 }
e9bc6d6b
KW		 872 }
873
874 /* If all the categories are the same, we can set LC_ALL to
875 * that */
876 if (! did_override) {
877 locale = default_name;
878 }
879 else {
880
881 /* Here, LC_ALL is no longer valid, as some individual
882 * categories don't match it. We call ourselves
883 * recursively, as that will execute the code that
884 * generates the proper locale string for this situation.
885 * We don't do the remainder of this function, as that is
886 * to update our records, and we've just done that for the
887 * individual categories in the loop above, and doing so
888 * would cause LC_ALL to be done as well */
889 return emulate_setlocale(LC_ALL, NULL, LC_ALL_INDEX, TRUE);
890 }
891 }
892 }
6aba5c5e 893 } /* End of this being setlocale(LC_foo, "") */
e9bc6d6b
KW		 894 else if (strchr(locale, ';')) {
895
896 /* LC_ALL may actually incude a conglomeration of various categories.
897 * Without querylocale, this code uses the glibc (as of this writing)
898 * syntax for representing that, but that is not a stable API, and
899 * other platforms do it differently, so we have to handle all cases
900 * ourselves */
901
f0023d47 902 unsigned int i;
e9bc6d6b
KW		 903 const char * s = locale;
904 const char * e = locale + strlen(locale);
905 const char * p = s;
906 const char * category_end;
907 const char * name_start;
908 const char * name_end;
909
f0023d47
KW		 910 /* If the string that gives what to set doesn't include all categories,
911 * the omitted ones get set to "C". To get this behavior, first set
912 * all the individual categories to "C", and override the furnished
913 * ones below */
914 for (i = 0; i < LC_ALL_INDEX; i++) {
915 if (! emulate_setlocale(categories[i], "C", i, TRUE)) {
916 return NULL;
917 }
918 }
919
e9bc6d6b 920 while (s < e) {
e9bc6d6b
KW		 921
922 /* Parse through the category */
923 while (isWORDCHAR(*p)) {
924 p++;
925 }
926 category_end = p;
927
928 if (*p++ != '=') {
929 Perl_croak(aTHX_
930 "panic: %s: %d: Unexpected character in locale name '%02X",
931 __FILE__, __LINE__, *(p-1));
932 }
933
934 /* Parse through the locale name */
935 name_start = p;
bee74f4b
KW		 936 while (p < e && *p != ';') {
937 if (! isGRAPH(*p)) {
938 Perl_croak(aTHX_
939 "panic: %s: %d: Unexpected character in locale name '%02X",
940 __FILE__, __LINE__, *(p-1));
941 }
e9bc6d6b
KW		 942 p++;
943 }
944 name_end = p;
945
bee74f4b
KW		 946 /* Space past the semi-colon */
947 if (p < e) {
948 p++;
e9bc6d6b
KW		 949 }
950
951 /* Find the index of the category name in our lists */
952 for (i = 0; i < LC_ALL_INDEX; i++) {
3c76a412 953 char * individ_locale;
e9bc6d6b
KW		 954
955 /* Keep going if this isn't the index. The strnNE() avoids a
956 * Perl_form(), but would fail if ever a category name could be
957 * a substring of another one, like if there were a
958 * "LC_TIME_DATE" */
959 if strnNE(s, category_names[i], category_end - s) {
960 continue;
961 }
962
963 /* If this index is for the single category we're changing, we
964 * have found the locale to set it to. */
965 if (category == categories[i]) {
966 locale = Perl_form(aTHX_ "%.*s",
967 (int) (name_end - name_start),
968 name_start);
969 goto ready_to_set;
970 }
971
3c76a412 972 assert(category == LC_ALL);
bee74f4b
KW		 973 individ_locale = Perl_form(aTHX_ "%.*s",
974 (int) (name_end - name_start), name_start);
6435f98d
KW		 975 if (! emulate_setlocale(categories[i], individ_locale, i, TRUE))
976 {
977 return NULL;
978 }
e9bc6d6b
KW		 979 }
980
981 s = p;
982 }
983
984 /* Here we have set all the individual categories by recursive calls.
985 * These collectively should have fixed up LC_ALL, so can just query
986 * what that now is */
987 assert(category == LC_ALL);
988
989 return do_setlocale_c(LC_ALL, NULL);
6aba5c5e
KW		 990 } /* End of this being setlocale(LC_ALL,
991 "LC_CTYPE=foo;LC_NUMERIC=bar;...") */
e9bc6d6b
KW		 992
993 ready_to_set: ;
994
f8115d60
KW		 995 /* Here at the end of having to deal with the absence of querylocale().
996 * Some cases have already been fully handled by recursive calls to this
997 * function. But at this point, we haven't dealt with those, but are now
998 * prepared to, knowing what the locale name to set this category to is.
999 * This would have come for free if this system had had querylocale() */
1000
e9bc6d6b
KW		 1001# endif /* end of ! querylocale */
1002
f8115d60
KW		 1003 assert(PL_C_locale_obj);
1004
1005 /* Switching locales generally entails freeing the current one's space (at
1006 * the C library's discretion). We need to stop using that locale before
1007 * the switch. So switch to a known locale object that we don't otherwise
1008 * mess with. This returns the locale object in effect at the time of the
1009 * switch. */
1010 old_obj = uselocale(PL_C_locale_obj);
1011
1012# ifdef DEBUGGING
1013
1014 if (DEBUG_Lv_TEST || debug_initialization) {
1015 PerlIO_printf(Perl_debug_log, "%s:%d: emulate_setlocale was using %p\n", __FILE__, __LINE__, old_obj);
1016 }
1017
1018# endif
1019
1020 if (! old_obj) {
1021
1022# ifdef DEBUGGING
1023
1024 if (DEBUG_L_TEST || debug_initialization) {
1025 dSAVE_ERRNO;
1026 PerlIO_printf(Perl_debug_log, "%s:%d: emulate_setlocale switching to C failed: %d\n", __FILE__, __LINE__, GET_ERRNO);
1027 RESTORE_ERRNO;
1028 }
1029
1030# endif
1031
1032 return NULL;
1033 }
1034
1035# ifdef DEBUGGING
1036
1037 if (DEBUG_Lv_TEST || debug_initialization) {
b22e9937
KW		 1038 PerlIO_printf(Perl_debug_log,
1039 "%s:%d: emulate_setlocale now using %p\n",
1040 __FILE__, __LINE__, PL_C_locale_obj);
f8115d60
KW		 1041 }
1042
1043# endif
1044
6aba5c5e
KW		 1045 /* If this call is to switch to the LC_ALL C locale, it already exists, and
1046 * in fact, we already have switched to it (in preparation for what
1047 * normally is to come). But since we're already there, continue to use
70bd6bc8
KW		 1048 * it instead of trying to create a new locale */
1049 if (mask == LC_ALL_MASK && isNAME_C_OR_POSIX(locale)) {
1050
1051# ifdef DEBUGGING
1052
1053 if (DEBUG_Lv_TEST || debug_initialization) {
1054 PerlIO_printf(Perl_debug_log,
1055 "%s:%d: will stay in C object\n", __FILE__, __LINE__);
1056 }
1057
1058# endif
1059
1060 new_obj = PL_C_locale_obj;
1061
1062 /* We already had switched to the C locale in preparation for freeing
b22e9937 1063 * 'old_obj' */
70bd6bc8
KW		 1064 if (old_obj != LC_GLOBAL_LOCALE && old_obj != PL_C_locale_obj) {
1065 freelocale(old_obj);
1066 }
1067 }
1068 else {
b22e9937
KW		 1069 /* If we weren't in a thread safe locale, set so that newlocale() below
1070 * which uses 'old_obj', uses an empty one. Same for our reserved C
1071 * object. The latter is defensive coding, so that, even if there is
1072 * some bug, we will never end up trying to modify either of these, as
1073 * if passed to newlocale(), they can be. */
1074 if (old_obj == LC_GLOBAL_LOCALE || old_obj == PL_C_locale_obj) {
1075 old_obj = (locale_t) 0;
1076 }
f8115d60 1077
b22e9937
KW		 1078 /* Ready to create a new locale by modification of the exising one */
1079 new_obj = newlocale(mask, locale, old_obj);
e9bc6d6b 1080
b22e9937
KW		 1081 if (! new_obj) {
1082 dSAVE_ERRNO;
e9bc6d6b
KW		 1083
1084# ifdef DEBUGGING
1085
b22e9937
KW		 1086 if (DEBUG_L_TEST || debug_initialization) {
1087 PerlIO_printf(Perl_debug_log,
1088 "%s:%d: emulate_setlocale creating new object"
1089 " failed: %d\n", __FILE__, __LINE__, GET_ERRNO);
1090 }
e9bc6d6b
KW		 1091
1092# endif
1093
b22e9937 1094 if (! uselocale(old_obj)) {
e9bc6d6b
KW		 1095
1096# ifdef DEBUGGING
1097
b22e9937
KW		 1098 if (DEBUG_L_TEST || debug_initialization) {
1099 PerlIO_printf(Perl_debug_log,
1100 "%s:%d: switching back failed: %d\n",
1101 __FILE__, __LINE__, GET_ERRNO);
1102 }
e9bc6d6b
KW		 1103
1104# endif
1105
b22e9937
KW		 1106 }
1107 RESTORE_ERRNO;
1108 return NULL;
e9bc6d6b 1109 }
e9bc6d6b
KW		 1110
1111# ifdef DEBUGGING
1112
b22e9937
KW		 1113 if (DEBUG_Lv_TEST || debug_initialization) {
1114 PerlIO_printf(Perl_debug_log,
1115 "%s:%d: emulate_setlocale created %p",
1116 __FILE__, __LINE__, new_obj);
1117 if (old_obj) {
1118 PerlIO_printf(Perl_debug_log,
1119 "; should have freed %p", old_obj);
1120 }
1121 PerlIO_printf(Perl_debug_log, "\n");
19ee3daf 1122 }
e9bc6d6b
KW		 1123
1124# endif
1125
b22e9937
KW		 1126 /* And switch into it */
1127 if (! uselocale(new_obj)) {
1128 dSAVE_ERRNO;
e9bc6d6b
KW		 1129
1130# ifdef DEBUGGING
1131
b22e9937
KW		 1132 if (DEBUG_L_TEST || debug_initialization) {
1133 PerlIO_printf(Perl_debug_log,
1134 "%s:%d: emulate_setlocale switching to new object"
1135 " failed\n", __FILE__, __LINE__);
1136 }
e9bc6d6b
KW		 1137
1138# endif
1139
b22e9937 1140 if (! uselocale(old_obj)) {
e9bc6d6b
KW		 1141
1142# ifdef DEBUGGING
1143
b22e9937
KW		 1144 if (DEBUG_L_TEST || debug_initialization) {
1145 PerlIO_printf(Perl_debug_log,
1146 "%s:%d: switching back failed: %d\n",
1147 __FILE__, __LINE__, GET_ERRNO);
1148 }
e9bc6d6b
KW		 1149
1150# endif
1151
b22e9937
KW		 1152 }
1153 freelocale(new_obj);
1154 RESTORE_ERRNO;
1155 return NULL;
e9bc6d6b 1156 }
70bd6bc8 1157 }
e9bc6d6b
KW		 1158
1159# ifdef DEBUGGING
1160
1161 if (DEBUG_Lv_TEST || debug_initialization) {
b22e9937
KW		 1162 PerlIO_printf(Perl_debug_log,
1163 "%s:%d: emulate_setlocale now using %p\n",
1164 __FILE__, __LINE__, new_obj);
e9bc6d6b
KW		 1165 }
1166
1167# endif
1168
1169 /* We are done, except for updating our records (if the system doesn't keep
1170 * them) and in the case of locale "", we don't actually know what the
1171 * locale that got switched to is, as it came from the environment. So
1172 * have to find it */
1173
1174# ifdef HAS_QUERYLOCALE
1175
1176 if (strEQ(locale, "")) {
1177 locale = querylocale(mask, new_obj);
1178 }
1179
1180# else
1181
1182 /* Here, 'locale' is the return value */
1183
1184 /* Without querylocale(), we have to update our records */
1185
1186 if (category == LC_ALL) {
1187 unsigned int i;
1188
1189 /* For LC_ALL, we change all individual categories to correspond */
1190 /* PL_curlocales is a parallel array, so has same
1191 * length as 'categories' */
1192 for (i = 0; i <= LC_ALL_INDEX; i++) {
1193 Safefree(PL_curlocales[i]);
1194 PL_curlocales[i] = savepv(locale);
1195 }
45cef8fb
KW		 1196
1197 FIX_GLIBC_LC_MESSAGES_BUG(LC_MESSAGES_INDEX);
e9bc6d6b
KW		 1198 }
1199 else {
1200
1201 /* For a single category, if it's not the same as the one in LC_ALL, we
1202 * nullify LC_ALL */
1203
1204 if (PL_curlocales[LC_ALL_INDEX] && strNE(PL_curlocales[LC_ALL_INDEX], locale)) {
1205 Safefree(PL_curlocales[LC_ALL_INDEX]);
1206 PL_curlocales[LC_ALL_INDEX] = NULL;
1207 }
1208
1209 /* Then update the category's record */
1210 Safefree(PL_curlocales[index]);
1211 PL_curlocales[index] = savepv(locale);
45cef8fb
KW		 1212
1213 FIX_GLIBC_LC_MESSAGES_BUG(index);
e9bc6d6b
KW		 1214 }
1215
1216# endif
1217
1218 return locale;
1219}
1220
1221#endif /* USE_POSIX_2008_LOCALE */
1222
1223#if 0 /* Code that was to emulate thread-safe locales on platforms that
1224 didn't natively support them */
1225
1226/* The way this would work is that we would keep a per-thread list of the
1227 * correct locale for that thread. Any operation that was locale-sensitive
1228 * would have to be changed so that it would look like this:
1229 *
1230 * LOCALE_LOCK;
1231 * setlocale to the correct locale for this operation
1232 * do operation
1233 * LOCALE_UNLOCK
1234 *
1235 * This leaves the global locale in the most recently used operation's, but it
1236 * was locked long enough to get the result. If that result is static, it
1237 * needs to be copied before the unlock.
1238 *
1239 * Macros could be written like SETUP_LOCALE_DEPENDENT_OP(category) that did
1240 * the setup, but are no-ops when not needed, and similarly,
1241 * END_LOCALE_DEPENDENT_OP for the tear-down
1242 *
1243 * But every call to a locale-sensitive function would have to be changed, and
1244 * if a module didn't cooperate by using the mutex, things would break.
1245 *
1246 * This code was abandoned before being completed or tested, and is left as-is
1247*/
1248
1249# define do_setlocale_c(cat, locale) locking_setlocale(cat, locale, cat ## _INDEX, TRUE)
1250# define do_setlocale_r(cat, locale) locking_setlocale(cat, locale, 0, FALSE)
1251
1252STATIC char *
1253S_locking_setlocale(pTHX_
1254 const int category,
1255 const char * locale,
1256 int index,
1257 const bool is_index_valid
1258 )
1259{
1260 /* This function kind of performs a setlocale() on just the current thread;
1261 * thus it is kind of thread-safe. It does this by keeping a thread-level
1262 * array of the current locales for each category. Every time a locale is
1263 * switched to, it does the switch globally, but updates the thread's
1264 * array. A query as to what the current locale is just returns the
1265 * appropriate element from the array, and doesn't actually call the system
1266 * setlocale(). The saving into the array is done in an uninterruptible
1267 * section of code, so is unaffected by whatever any other threads might be
1268 * doing.
1269 *
1270 * All locale-sensitive operations must work by first starting a critical
1271 * section, then switching to the thread's locale as kept by this function,
1272 * and then doing the operation, then ending the critical section. Thus,
1273 * each gets done in the appropriate locale. simulating thread-safety.
1274 *
1275 * This function takes the same parameters, 'category' and 'locale', that
1276 * the regular setlocale() function does, but it also takes two additional
1277 * ones. This is because as described earlier. If we know on input the
1278 * index corresponding to the category into the array where we store the
1279 * current locales, we don't have to calculate it. If the caller knows at
06cc5386 1280 * compile time what the index is, it can pass it, setting
e9bc6d6b
KW		 1281 * 'is_index_valid' to TRUE; otherwise the index parameter is ignored.
1282 *
1283 */
1284
1285 /* If the input index might be incorrect, calculate the correct one */
1286 if (! is_index_valid) {
1287 unsigned int i;
1288
1289 if (DEBUG_Lv_TEST || debug_initialization) {
1290 PerlIO_printf(Perl_debug_log, "%s:%d: converting category %d to index\n", __FILE__, __LINE__, category);
1291 }
1292
1293 for (i = 0; i <= LC_ALL_INDEX; i++) {
1294 if (category == categories[i]) {
1295 index = i;
1296 goto found_index;
1297 }
1298 }
1299
1300 /* Here, we don't know about this category, so can't handle it.
1301 * XXX best we can do is to unsafely set this
1302 * XXX warning */
1303
1304 return my_setlocale(category, locale);
1305
1306 found_index: ;
1307
1308 if (DEBUG_Lv_TEST || debug_initialization) {
1309 PerlIO_printf(Perl_debug_log, "%s:%d: index is 0x%x\n", __FILE__, __LINE__, index);
1310 }
1311 }
1312
1313 /* For a query, just return what's in our records */
1314 if (new_locale == NULL) {
1315 return curlocales[index];
1316 }
1317
1318
1319 /* Otherwise, we need to do the switch, and save the result, all in a
1320 * critical section */
1321
1322 Safefree(curlocales[[index]]);
1323
1324 /* It might be that this is called from an already-locked section of code.
1325 * We would have to detect and skip the LOCK/UNLOCK if so */
1326 LOCALE_LOCK;
1327
1328 curlocales[index] = savepv(my_setlocale(category, new_locale));
1329
1330 if (strEQ(new_locale, "")) {
1331
1332#ifdef LC_ALL
1333
1334 /* The locale values come from the environment, and may not all be the
1335 * same, so for LC_ALL, we have to update all the others, while the
1336 * mutex is still locked */
1337
1338 if (category == LC_ALL) {
1339 unsigned int i;
1340 for (i = 0; i < LC_ALL_INDEX) {
1341 curlocales[i] = my_setlocale(categories[i], NULL);
1342 }
1343 }
1344 }
1345
1346#endif
1347
1348 LOCALE_UNLOCK;
1349
1350 return curlocales[index];
1351}
1352
1353#endif
d36adde0 1354#ifdef USE_LOCALE
837ce802 1355
a4f00dcc 1356STATIC void
86799d2d 1357S_set_numeric_radix(pTHX_ const bool use_locale)
98994639 1358{
86799d2d
KW		 1359 /* If 'use_locale' is FALSE, set to use a dot for the radix character. If
1360 * TRUE, use the radix character derived from the current locale */
7d4bcc4a 1361
86799d2d
KW		 1362#if defined(USE_LOCALE_NUMERIC) && ( defined(HAS_LOCALECONV) \
1363 || defined(HAS_NL_LANGINFO))
98994639 1364
87f8e8e7 1365 const char * radix = (use_locale)
4e6826bf 1366 ? my_nl_langinfo(RADIXCHAR, FALSE)
87f8e8e7
KW		 1367 /* FALSE => already in dest locale */
1368 : ".";
2213a3be 1369
87f8e8e7 1370 sv_setpv(PL_numeric_radix_sv, radix);
86799d2d 1371
87f8e8e7
KW		 1372 /* If this is valid UTF-8 that isn't totally ASCII, and we are in
1373 * a UTF-8 locale, then mark the radix as being in UTF-8 */
1374 if (is_utf8_non_invariant_string((U8 *) SvPVX(PL_numeric_radix_sv),
7a393424 1375 SvCUR(PL_numeric_radix_sv))
87f8e8e7
KW		 1376 && _is_cur_LC_category_utf8(LC_NUMERIC))
1377 {
1378 SvUTF8_on(PL_numeric_radix_sv);
1379 }
86799d2d
KW		 1380
1381# ifdef DEBUGGING
7d4bcc4a 1382
2fcc0ca9
KW		 1383 if (DEBUG_L_TEST || debug_initialization) {
1384 PerlIO_printf(Perl_debug_log, "Locale radix is '%s', ?UTF-8=%d\n",
3ca88433
KW		 1385 SvPVX(PL_numeric_radix_sv),
1386 cBOOL(SvUTF8(PL_numeric_radix_sv)));
2fcc0ca9 1387 }
69014004 1388
86799d2d 1389# endif
d36adde0
KW		 1390#else
1391
1392 PERL_UNUSED_ARG(use_locale);
1393
86799d2d 1394#endif /* USE_LOCALE_NUMERIC and can find the radix char */
7d4bcc4a 1395
98994639
HS		 1396}
1397
398eeea9
KW		 1398STATIC void
1399S_new_numeric(pTHX_ const char *newnum)
98994639 1400{
7d4bcc4a
KW		 1401
1402#ifndef USE_LOCALE_NUMERIC
1403
1404 PERL_UNUSED_ARG(newnum);
1405
1406#else
0d071d52 1407
291a84fb 1408 /* Called after each libc setlocale() call affecting LC_NUMERIC, to tell
0d071d52
KW		 1409 * core Perl this and that 'newnum' is the name of the new locale.
1410 * It installs this locale as the current underlying default.
1411 *
1412 * The default locale and the C locale can be toggled between by use of the
5792c642
KW		 1413 * set_numeric_underlying() and set_numeric_standard() functions, which
1414 * should probably not be called directly, but only via macros like
0d071d52
KW		 1415 * SET_NUMERIC_STANDARD() in perl.h.
1416 *
1417 * The toggling is necessary mainly so that a non-dot radix decimal point
1418 * character can be output, while allowing internal calculations to use a
1419 * dot.
1420 *
1421 * This sets several interpreter-level variables:
bb304765 1422 * PL_numeric_name The underlying locale's name: a copy of 'newnum'
892e6465 1423 * PL_numeric_underlying A boolean indicating if the toggled state is such
7738054c
KW		 1424 * that the current locale is the program's underlying
1425 * locale
1426 * PL_numeric_standard An int indicating if the toggled state is such
4c68b815
KW		 1427 * that the current locale is the C locale or
1428 * indistinguishable from the C locale. If non-zero, it
1429 * is in C; if > 1, it means it may not be toggled away
7738054c 1430 * from C.
4c68b815
KW		 1431 * PL_numeric_underlying_is_standard A bool kept by this function
1432 * indicating that the underlying locale and the standard
1433 * C locale are indistinguishable for the purposes of
1434 * LC_NUMERIC. This happens when both of the above two
1435 * variables are true at the same time. (Toggling is a
1436 * no-op under these circumstances.) This variable is
1437 * used to avoid having to recalculate.
398eeea9 1438 */
0d071d52 1439
b03f34cf 1440 char *save_newnum;
98994639
HS		 1441
1442 if (! newnum) {
43c5f42d
NC		 1443 Safefree(PL_numeric_name);
1444 PL_numeric_name = NULL;
98994639 1445 PL_numeric_standard = TRUE;
892e6465 1446 PL_numeric_underlying = TRUE;
4c68b815 1447 PL_numeric_underlying_is_standard = TRUE;
98994639
HS		 1448 return;
1449 }
1450
b03f34cf 1451 save_newnum = stdize_locale(savepv(newnum));
892e6465 1452 PL_numeric_underlying = TRUE;
4c68b815
KW		 1453 PL_numeric_standard = isNAME_C_OR_POSIX(save_newnum);
1454
69c5e0db
KW		 1455#ifndef TS_W32_BROKEN_LOCALECONV
1456
4c68b815 1457 /* If its name isn't C nor POSIX, it could still be indistinguishable from
69c5e0db
KW		 1458 * them. But on broken Windows systems calling my_nl_langinfo() for
1459 * THOUSEP can currently (but rarely) cause a race, so avoid doing that,
1460 * and just always change the locale if not C nor POSIX on those systems */
4c68b815 1461 if (! PL_numeric_standard) {
4e6826bf 1462 PL_numeric_standard = cBOOL(strEQ(".", my_nl_langinfo(RADIXCHAR,
4c68b815 1463 FALSE /* Don't toggle locale */ ))
4e6826bf 1464 && strEQ("", my_nl_langinfo(THOUSEP, FALSE)));
4c68b815 1465 }
abe1abcf 1466
69c5e0db
KW		 1467#endif
1468
4c68b815 1469 /* Save the new name if it isn't the same as the previous one, if any */
b03f34cf 1470 if (! PL_numeric_name || strNE(PL_numeric_name, save_newnum)) {
98994639 1471 Safefree(PL_numeric_name);
b03f34cf 1472 PL_numeric_name = save_newnum;
b03f34cf 1473 }
abe1abcf
KW		 1474 else {
1475 Safefree(save_newnum);
1476 }
4c28b29c 1477
4c68b815
KW		 1478 PL_numeric_underlying_is_standard = PL_numeric_standard;
1479
7e5377f7 1480# ifdef HAS_POSIX_2008_LOCALE
e1aa2579
KW		 1481
1482 PL_underlying_numeric_obj = newlocale(LC_NUMERIC_MASK,
1483 PL_numeric_name,
1484 PL_underlying_numeric_obj);
1485
1486#endif
1487
4c68b815
KW		 1488 if (DEBUG_L_TEST || debug_initialization) {
1489 PerlIO_printf(Perl_debug_log, "Called new_numeric with %s, PL_numeric_name=%s\n", newnum, PL_numeric_name);
1490 }
1491
4c28b29c
KW		 1492 /* Keep LC_NUMERIC in the C locale. This is for XS modules, so they don't
1493 * have to worry about the radix being a non-dot. (Core operations that
1494 * need the underlying locale change to it temporarily). */
84f1d29f
KW		 1495 if (PL_numeric_standard) {
1496 set_numeric_radix(0);
1497 }
1498 else {
1499 set_numeric_standard();
1500 }
4c28b29c 1501
98994639 1502#endif /* USE_LOCALE_NUMERIC */
7d4bcc4a 1503
98994639
HS		 1504}
1505
1506void
1507Perl_set_numeric_standard(pTHX)
1508{
7d4bcc4a 1509
98994639 1510#ifdef USE_LOCALE_NUMERIC
7d4bcc4a 1511
28c1bf33
KW		 1512 /* Toggle the LC_NUMERIC locale to C. Most code should use the macros like
1513 * SET_NUMERIC_STANDARD() in perl.h instead of calling this directly. The
1514 * macro avoids calling this routine if toggling isn't necessary according
1515 * to our records (which could be wrong if some XS code has changed the
1516 * locale behind our back) */
0d071d52 1517
7d4bcc4a
KW		 1518# ifdef DEBUGGING
1519
2fcc0ca9
KW		 1520 if (DEBUG_L_TEST || debug_initialization) {
1521 PerlIO_printf(Perl_debug_log,
7bb8f702 1522 "Setting LC_NUMERIC locale to standard C\n");
2fcc0ca9 1523 }
98994639 1524
7d4bcc4a 1525# endif
7bb8f702
KW		 1526
1527 do_setlocale_c(LC_NUMERIC, "C");
1528 PL_numeric_standard = TRUE;
1529 PL_numeric_underlying = PL_numeric_underlying_is_standard;
1530 set_numeric_radix(0);
1531
98994639 1532#endif /* USE_LOCALE_NUMERIC */
7d4bcc4a 1533
98994639
HS		 1534}
1535
1536void
5792c642 1537Perl_set_numeric_underlying(pTHX)
98994639 1538{
7d4bcc4a 1539
98994639 1540#ifdef USE_LOCALE_NUMERIC
7d4bcc4a 1541
28c1bf33 1542 /* Toggle the LC_NUMERIC locale to the current underlying default. Most
7d4bcc4a
KW		 1543 * code should use the macros like SET_NUMERIC_UNDERLYING() in perl.h
1544 * instead of calling this directly. The macro avoids calling this routine
1545 * if toggling isn't necessary according to our records (which could be
1546 * wrong if some XS code has changed the locale behind our back) */
a9b8c0d8 1547
7d4bcc4a
KW		 1548# ifdef DEBUGGING
1549
2fcc0ca9
KW		 1550 if (DEBUG_L_TEST || debug_initialization) {
1551 PerlIO_printf(Perl_debug_log,
7bb8f702 1552 "Setting LC_NUMERIC locale to %s\n",
2fcc0ca9
KW		 1553 PL_numeric_name);
1554 }
98994639 1555
7d4bcc4a 1556# endif
7bb8f702
KW		 1557
1558 do_setlocale_c(LC_NUMERIC, PL_numeric_name);
1559 PL_numeric_standard = PL_numeric_underlying_is_standard;
1560 PL_numeric_underlying = TRUE;
1561 set_numeric_radix(! PL_numeric_standard);
1562
98994639 1563#endif /* USE_LOCALE_NUMERIC */
7d4bcc4a 1564
98994639
HS		 1565}
1566
1567/*
1568 * Set up for a new ctype locale.
1569 */
a4f00dcc
KW		 1570STATIC void
1571S_new_ctype(pTHX_ const char *newctype)
98994639 1572{
7d4bcc4a
KW		 1573
1574#ifndef USE_LOCALE_CTYPE
1575
7d4bcc4a
KW		 1576 PERL_UNUSED_ARG(newctype);
1577 PERL_UNUSED_CONTEXT;
1578
1579#else
0d071d52 1580
291a84fb 1581 /* Called after each libc setlocale() call affecting LC_CTYPE, to tell
0d071d52
KW		 1582 * core Perl this and that 'newctype' is the name of the new locale.
1583 *
1584 * This function sets up the folding arrays for all 256 bytes, assuming
1585 * that tofold() is tolc() since fold case is not a concept in POSIX,
1586 *
1587 * Any code changing the locale (outside this file) should use
9aac5db8
KW		 1588 * Perl_setlocale or POSIX::setlocale, which call this function. Therefore
1589 * this function should be called directly only from this file and from
0d071d52
KW		 1590 * POSIX::setlocale() */
1591
013f4e03 1592 unsigned int i;
98994639 1593
8b7358b9
KW		 1594 /* Don't check for problems if we are suppressing the warnings */
1595 bool check_for_problems = ckWARN_d(WARN_LOCALE) || UNLIKELY(DEBUG_L_TEST);
30d8090d 1596 bool maybe_utf8_turkic = FALSE;
8b7358b9 1597
7918f24d
NC		 1598 PERL_ARGS_ASSERT_NEW_CTYPE;
1599
215c5139
KW		 1600 /* We will replace any bad locale warning with 1) nothing if the new one is
1601 * ok; or 2) a new warning for the bad new locale */
1602 if (PL_warn_locale) {
1603 SvREFCNT_dec_NN(PL_warn_locale);
1604 PL_warn_locale = NULL;
1605 }
1606
c1284011 1607 PL_in_utf8_CTYPE_locale = _is_cur_LC_category_utf8(LC_CTYPE);
31f05a37
KW		 1608
1609 /* A UTF-8 locale gets standard rules. But note that code still has to
1610 * handle this specially because of the three problematic code points */
1611 if (PL_in_utf8_CTYPE_locale) {
1612 Copy(PL_fold_latin1, PL_fold_locale, 256, U8);
30d8090d
KW		 1613
1614 /* UTF-8 locales can have special handling for 'I' and 'i' if they are
1615 * Turkic. Make sure these two are the only anomalies. (We don't use
1616 * towupper and towlower because they aren't in C89.) */
5b64f24c
KW		 1617
1618#if defined(HAS_TOWUPPER) && defined (HAS_TOWLOWER)
1619
1620 if (towupper('i') == 0x130 && towlower('I') == 0x131) {
1621
1622#else
1623
30d8090d 1624 if (toupper('i') == 'i' && tolower('I') == 'I') {
5b64f24c
KW		 1625
1626#endif
30d8090d
KW		 1627 check_for_problems = TRUE;
1628 maybe_utf8_turkic = TRUE;
1629 }
31f05a37 1630 }
8b7358b9
KW		 1631
1632 /* We don't populate the other lists if a UTF-8 locale, but do check that
1633 * everything works as expected, unless checking turned off */
1634 if (check_for_problems || ! PL_in_utf8_CTYPE_locale) {
8c6180a9
KW		 1635 /* Assume enough space for every character being bad. 4 spaces each
1636 * for the 94 printable characters that are output like "'x' "; and 5
1637 * spaces each for "'\\' ", "'\t' ", and "'\n' "; plus a terminating
1638 * NUL */
8b7358b9 1639 char bad_chars_list[ (94 * 4) + (3 * 5) + 1 ] = { '\0' };
8c6180a9
KW		 1640 bool multi_byte_locale = FALSE; /* Assume is a single-byte locale
1641 to start */
1642 unsigned int bad_count = 0; /* Count of bad characters */
1643
baa60164 1644 for (i = 0; i < 256; i++) {
8b7358b9 1645 if (! PL_in_utf8_CTYPE_locale) {
bd6d0898
KW		 1646 if (isupper(i))
1647 PL_fold_locale[i] = (U8) tolower(i);
1648 else if (islower(i))
1649 PL_fold_locale[i] = (U8) toupper(i);
1650 else
1651 PL_fold_locale[i] = (U8) i;
8b7358b9 1652 }
8c6180a9
KW		 1653
1654 /* If checking for locale problems, see if the native ASCII-range
1655 * printables plus \n and \t are in their expected categories in
1656 * the new locale. If not, this could mean big trouble, upending
1657 * Perl's and most programs' assumptions, like having a
1658 * metacharacter with special meaning become a \w. Fortunately,
1659 * it's very rare to find locales that aren't supersets of ASCII
1660 * nowadays. It isn't a problem for most controls to be changed
1661 * into something else; we check only \n and \t, though perhaps \r
1662 * could be an issue as well. */
7d4bcc4a 1663 if ( check_for_problems
8c6180a9
KW		 1664 && (isGRAPH_A(i) || isBLANK_A(i) || i == '\n'))
1665 {
8b7358b9 1666 bool is_bad = FALSE;
6726b4f4 1667 char name[4] = { '\0' };
8b7358b9
KW		 1668
1669 /* Convert the name into a string */
6726b4f4 1670 if (isGRAPH_A(i)) {
8b7358b9
KW		 1671 name[0] = i;
1672 name[1] = '\0';
1673 }
1674 else if (i == '\n') {
6726b4f4
KW		 1675 my_strlcpy(name, "\\n", sizeof(name));
1676 }
1677 else if (i == '\t') {
1678 my_strlcpy(name, "\\t", sizeof(name));
8b7358b9
KW		 1679 }
1680 else {
6726b4f4
KW		 1681 assert(i == ' ');
1682 my_strlcpy(name, "' '", sizeof(name));
8b7358b9
KW		 1683 }
1684
1685 /* Check each possibe class */
1686 if (UNLIKELY(cBOOL(isalnum(i)) != cBOOL(isALPHANUMERIC_A(i)))) {
1687 is_bad = TRUE;
1688 DEBUG_L(PerlIO_printf(Perl_debug_log,
1689 "isalnum('%s') unexpectedly is %d\n",
1690 name, cBOOL(isalnum(i))));
1691 }
1692 if (UNLIKELY(cBOOL(isalpha(i)) != cBOOL(isALPHA_A(i)))) {
1693 is_bad = TRUE;
1694 DEBUG_L(PerlIO_printf(Perl_debug_log,
1695 "isalpha('%s') unexpectedly is %d\n",
1696 name, cBOOL(isalpha(i))));
1697 }
1698 if (UNLIKELY(cBOOL(isdigit(i)) != cBOOL(isDIGIT_A(i)))) {
1699 is_bad = TRUE;
1700 DEBUG_L(PerlIO_printf(Perl_debug_log,
1701 "isdigit('%s') unexpectedly is %d\n",
1702 name, cBOOL(isdigit(i))));
1703 }
1704 if (UNLIKELY(cBOOL(isgraph(i)) != cBOOL(isGRAPH_A(i)))) {
1705 is_bad = TRUE;
1706 DEBUG_L(PerlIO_printf(Perl_debug_log,
1707 "isgraph('%s') unexpectedly is %d\n",
1708 name, cBOOL(isgraph(i))));
1709 }
1710 if (UNLIKELY(cBOOL(islower(i)) != cBOOL(isLOWER_A(i)))) {
1711 is_bad = TRUE;
1712 DEBUG_L(PerlIO_printf(Perl_debug_log,
1713 "islower('%s') unexpectedly is %d\n",
1714 name, cBOOL(islower(i))));
1715 }
1716 if (UNLIKELY(cBOOL(isprint(i)) != cBOOL(isPRINT_A(i)))) {
1717 is_bad = TRUE;
1718 DEBUG_L(PerlIO_printf(Perl_debug_log,
1719 "isprint('%s') unexpectedly is %d\n",
1720 name, cBOOL(isprint(i))));
1721 }
1722 if (UNLIKELY(cBOOL(ispunct(i)) != cBOOL(isPUNCT_A(i)))) {
1723 is_bad = TRUE;
1724 DEBUG_L(PerlIO_printf(Perl_debug_log,
1725 "ispunct('%s') unexpectedly is %d\n",
1726 name, cBOOL(ispunct(i))));
1727 }
1728 if (UNLIKELY(cBOOL(isspace(i)) != cBOOL(isSPACE_A(i)))) {
1729 is_bad = TRUE;
1730 DEBUG_L(PerlIO_printf(Perl_debug_log,
1731 "isspace('%s') unexpectedly is %d\n",
1732 name, cBOOL(isspace(i))));
1733 }
1734 if (UNLIKELY(cBOOL(isupper(i)) != cBOOL(isUPPER_A(i)))) {
1735 is_bad = TRUE;
1736 DEBUG_L(PerlIO_printf(Perl_debug_log,
1737 "isupper('%s') unexpectedly is %d\n",
1738 name, cBOOL(isupper(i))));
1739 }
1740 if (UNLIKELY(cBOOL(isxdigit(i))!= cBOOL(isXDIGIT_A(i)))) {
1741 is_bad = TRUE;
1742 DEBUG_L(PerlIO_printf(Perl_debug_log,
1743 "isxdigit('%s') unexpectedly is %d\n",
1744 name, cBOOL(isxdigit(i))));
1745 }
65c15174 1746 if (UNLIKELY(tolower(i) != (int) toLOWER_A(i))) {
8b7358b9
KW		 1747 is_bad = TRUE;
1748 DEBUG_L(PerlIO_printf(Perl_debug_log,
1749 "tolower('%s')=0x%x instead of the expected 0x%x\n",
1750 name, tolower(i), (int) toLOWER_A(i)));
1751 }
65c15174 1752 if (UNLIKELY(toupper(i) != (int) toUPPER_A(i))) {
8b7358b9
KW		 1753 is_bad = TRUE;
1754 DEBUG_L(PerlIO_printf(Perl_debug_log,
1755 "toupper('%s')=0x%x instead of the expected 0x%x\n",
1756 name, toupper(i), (int) toUPPER_A(i)));
1757 }
1758 if (UNLIKELY((i == '\n' && ! isCNTRL_LC(i)))) {
1759 is_bad = TRUE;
1760 DEBUG_L(PerlIO_printf(Perl_debug_log,
1761 "'\\n' (=%02X) is not a control\n", (int) i));
1762 }
1763
1764 /* Add to the list; Separate multiple entries with a blank */
1765 if (is_bad) {
1766 if (bad_count) {
1767 my_strlcat(bad_chars_list, " ", sizeof(bad_chars_list));
8c6180a9 1768 }
8b7358b9
KW		 1769 my_strlcat(bad_chars_list, name, sizeof(bad_chars_list));
1770 bad_count++;
8c6180a9
KW		 1771 }
1772 }
1773 }
1774
30d8090d
KW		 1775 if (bad_count == 2 && maybe_utf8_turkic) {
1776 bad_count = 0;
1777 *bad_chars_list = '\0';
1778 PL_fold_locale['I'] = 'I';
1779 PL_fold_locale['i'] = 'i';
1780 PL_in_utf8_turkic_locale = TRUE;
1781 DEBUG_L(PerlIO_printf(Perl_debug_log, "%s:%d: %s is turkic\n",
1782 __FILE__, __LINE__, newctype));
1783 }
1784 else {
b8df1494 1785 PL_in_utf8_turkic_locale = FALSE;
30d8090d 1786 }
b8df1494 1787
7d4bcc4a
KW		 1788# ifdef MB_CUR_MAX
1789
8c6180a9 1790 /* We only handle single-byte locales (outside of UTF-8 ones; so if
d35fca5f 1791 * this locale requires more than one byte, there are going to be
8c6180a9 1792 * problems. */
9c8a6dc2
KW		 1793 DEBUG_Lv(PerlIO_printf(Perl_debug_log,
1794 "%s:%d: check_for_problems=%d, MB_CUR_MAX=%d\n",
1795 __FILE__, __LINE__, check_for_problems, (int) MB_CUR_MAX));
1796
8b7358b9
KW		 1797 if ( check_for_problems && MB_CUR_MAX > 1
1798 && ! PL_in_utf8_CTYPE_locale
ba1a4362
KW		 1799
1800 /* Some platforms return MB_CUR_MAX > 1 for even the "C"
1801 * locale. Just assume that the implementation for them (plus
1802 * for POSIX) is correct and the > 1 value is spurious. (Since
1803 * these are specially handled to never be considered UTF-8
1804 * locales, as long as this is the only problem, everything
1805 * should work fine */
1806 && strNE(newctype, "C") && strNE(newctype, "POSIX"))
1807 {
8c6180a9
KW		 1808 multi_byte_locale = TRUE;
1809 }
7d4bcc4a
KW		 1810
1811# endif
8c6180a9 1812
30d8090d
KW		 1813 /* If we found problems and we want them output, do so */
1814 if ( (UNLIKELY(bad_count) || UNLIKELY(multi_byte_locale))
1815 && (LIKELY(ckWARN_d(WARN_LOCALE)) || UNLIKELY(DEBUG_L_TEST)))
1816 {
8b7358b9
KW		 1817 if (UNLIKELY(bad_count) && PL_in_utf8_CTYPE_locale) {
1818 PL_warn_locale = Perl_newSVpvf(aTHX_
1819 "Locale '%s' contains (at least) the following characters"
578a6a87
KW		 1820 " which have\nunexpected meanings: %s\nThe Perl program"
1821 " will use the expected meanings",
8b7358b9 1822 newctype, bad_chars_list);
8b7358b9
KW		 1823 }
1824 else {
1825 PL_warn_locale = Perl_newSVpvf(aTHX_
8c6180a9 1826 "Locale '%s' may not work well.%s%s%s\n",
780fcc9f 1827 newctype,
8c6180a9
KW		 1828 (multi_byte_locale)
1829 ? " Some characters in it are not recognized by"
1830 " Perl."
1831 : "",
1832 (bad_count)
1833 ? "\nThe following characters (and maybe others)"
1834 " may not have the same meaning as the Perl"
1835 " program expects:\n"
1836 : "",
1837 (bad_count)
1838 ? bad_chars_list
1839 : ""
1840 );
8b7358b9
KW		 1841 }
1842
b119c2be
KW		 1843# ifdef HAS_NL_LANGINFO
1844
1845 Perl_sv_catpvf(aTHX_ PL_warn_locale, "; codeset=%s",
1846 /* parameter FALSE is a don't care here */
4e6826bf 1847 my_nl_langinfo(CODESET, FALSE));
b119c2be
KW		 1848
1849# endif
1850
8b7358b9
KW		 1851 Perl_sv_catpvf(aTHX_ PL_warn_locale, "\n");
1852
cc9eaeb0 1853 /* If we are actually in the scope of the locale or are debugging,
bddebb56
KW		 1854 * output the message now. If not in that scope, we save the
1855 * message to be output at the first operation using this locale,
1856 * if that actually happens. Most programs don't use locales, so
1857 * they are immune to bad ones. */
cc9eaeb0 1858 if (IN_LC(LC_CTYPE) || UNLIKELY(DEBUG_L_TEST)) {
780fcc9f 1859
780fcc9f
KW		 1860 /* The '0' below suppresses a bogus gcc compiler warning */
1861 Perl_warner(aTHX_ packWARN(WARN_LOCALE), SvPVX(PL_warn_locale), 0);
bddebb56 1862
bddebb56
KW		 1863 if (IN_LC(LC_CTYPE)) {
1864 SvREFCNT_dec_NN(PL_warn_locale);
1865 PL_warn_locale = NULL;
1866 }
780fcc9f 1867 }
baa60164 1868 }
31f05a37 1869 }
98994639
HS		 1870
1871#endif /* USE_LOCALE_CTYPE */
7d4bcc4a 1872
98994639
HS		 1873}
1874
98994639 1875void
2726666d
KW		 1876Perl__warn_problematic_locale()
1877{
2726666d
KW		 1878
1879#ifdef USE_LOCALE_CTYPE
1880
5f04a188
KW		 1881 dTHX;
1882
1883 /* Internal-to-core function that outputs the message in PL_warn_locale,
1884 * and then NULLS it. Should be called only through the macro
1885 * _CHECK_AND_WARN_PROBLEMATIC_LOCALE */
1886
2726666d 1887 if (PL_warn_locale) {
2726666d
KW		 1888 Perl_ck_warner(aTHX_ packWARN(WARN_LOCALE),
1889 SvPVX(PL_warn_locale),
1890 0 /* dummy to avoid compiler warning */ );
2726666d
KW		 1891 SvREFCNT_dec_NN(PL_warn_locale);
1892 PL_warn_locale = NULL;
1893 }
1894
1895#endif
1896
1897}
1898
a4f00dcc
KW		 1899STATIC void
1900S_new_collate(pTHX_ const char *newcoll)
98994639 1901{
7d4bcc4a
KW		 1902
1903#ifndef USE_LOCALE_COLLATE
1904
1905 PERL_UNUSED_ARG(newcoll);
1906 PERL_UNUSED_CONTEXT;
1907
1908#else
0d071d52 1909
291a84fb 1910 /* Called after each libc setlocale() call affecting LC_COLLATE, to tell
0d071d52
KW		 1911 * core Perl this and that 'newcoll' is the name of the new locale.
1912 *
d35fca5f
KW		 1913 * The design of locale collation is that every locale change is given an
1914 * index 'PL_collation_ix'. The first time a string particpates in an
1915 * operation that requires collation while locale collation is active, it
1916 * is given PERL_MAGIC_collxfrm magic (via sv_collxfrm_flags()). That
1917 * magic includes the collation index, and the transformation of the string
1918 * by strxfrm(), q.v. That transformation is used when doing comparisons,
1919 * instead of the string itself. If a string changes, the magic is
1920 * cleared. The next time the locale changes, the index is incremented,
1921 * and so we know during a comparison that the transformation is not
1922 * necessarily still valid, and so is recomputed. Note that if the locale
1923 * changes enough times, the index could wrap (a U32), and it is possible
1924 * that a transformation would improperly be considered valid, leading to
1925 * an unlikely bug */
0d071d52 1926
98994639
HS		 1927 if (! newcoll) {
1928 if (PL_collation_name) {
1929 ++PL_collation_ix;
1930 Safefree(PL_collation_name);
1931 PL_collation_name = NULL;
1932 }
1933 PL_collation_standard = TRUE;
00bf60ca 1934 is_standard_collation:
98994639
HS		 1935 PL_collxfrm_base = 0;
1936 PL_collxfrm_mult = 2;
165a1c52 1937 PL_in_utf8_COLLATE_locale = FALSE;
f28f4d2a 1938 PL_strxfrm_NUL_replacement = '\0';
a4a439fb 1939 PL_strxfrm_max_cp = 0;
98994639
HS		 1940 return;
1941 }
1942
d35fca5f 1943 /* If this is not the same locale as currently, set the new one up */
98994639
HS		 1944 if (! PL_collation_name || strNE(PL_collation_name, newcoll)) {
1945 ++PL_collation_ix;
1946 Safefree(PL_collation_name);
1947 PL_collation_name = stdize_locale(savepv(newcoll));
a39edc4c 1948 PL_collation_standard = isNAME_C_OR_POSIX(newcoll);
00bf60ca
KW		 1949 if (PL_collation_standard) {
1950 goto is_standard_collation;
1951 }
98994639 1952
165a1c52 1953 PL_in_utf8_COLLATE_locale = _is_cur_LC_category_utf8(LC_COLLATE);
f28f4d2a 1954 PL_strxfrm_NUL_replacement = '\0';
a4a439fb 1955 PL_strxfrm_max_cp = 0;
165a1c52 1956
59c018b9
KW		 1957 /* A locale collation definition includes primary, secondary, tertiary,
1958 * etc. weights for each character. To sort, the primary weights are
1959 * used, and only if they compare equal, then the secondary weights are
1960 * used, and only if they compare equal, then the tertiary, etc.
1961 *
1962 * strxfrm() works by taking the input string, say ABC, and creating an
1963 * output transformed string consisting of first the primary weights,
1964 * A¹B¹C¹ followed by the secondary ones, A²B²C²; and then the
1965 * tertiary, etc, yielding A¹B¹C¹ A²B²C² A³B³C³ .... Some characters
1966 * may not have weights at every level. In our example, let's say B
1967 * doesn't have a tertiary weight, and A doesn't have a secondary
1968 * weight. The constructed string is then going to be
1969 * A¹B¹C¹ B²C² A³C³ ....
1970 * This has the desired effect that strcmp() will look at the secondary
1971 * or tertiary weights only if the strings compare equal at all higher
1972 * priority weights. The spaces shown here, like in
c342d20e 1973 * "A¹B¹C¹ A²B²C² "
59c018b9
KW		 1974 * are not just for readability. In the general case, these must
1975 * actually be bytes, which we will call here 'separator weights'; and
1976 * they must be smaller than any other weight value, but since these
1977 * are C strings, only the terminating one can be a NUL (some
1978 * implementations may include a non-NUL separator weight just before
1979 * the NUL). Implementations tend to reserve 01 for the separator
1980 * weights. They are needed so that a shorter string's secondary
1981 * weights won't be misconstrued as primary weights of a longer string,
1982 * etc. By making them smaller than any other weight, the shorter
1983 * string will sort first. (Actually, if all secondary weights are
1984 * smaller than all primary ones, there is no need for a separator
1985 * weight between those two levels, etc.)
1986 *
1987 * The length of the transformed string is roughly a linear function of
1988 * the input string. It's not exactly linear because some characters
1989 * don't have weights at all levels. When we call strxfrm() we have to
1990 * allocate some memory to hold the transformed string. The
1991 * calculations below try to find coefficients 'm' and 'b' for this
1992 * locale so that m*x + b equals how much space we need, given the size
1993 * of the input string in 'x'. If we calculate too small, we increase
1994 * the size as needed, and call strxfrm() again, but it is better to
1995 * get it right the first time to avoid wasted expensive string
1996 * transformations. */
1997
98994639 1998 {
79f120c8
KW		 1999 /* We use the string below to find how long the tranformation of it
2000 * is. Almost all locales are supersets of ASCII, or at least the
2001 * ASCII letters. We use all of them, half upper half lower,
2002 * because if we used fewer, we might hit just the ones that are
2003 * outliers in a particular locale. Most of the strings being
2004 * collated will contain a preponderance of letters, and even if
2005 * they are above-ASCII, they are likely to have the same number of
2006 * weight levels as the ASCII ones. It turns out that digits tend
2007 * to have fewer levels, and some punctuation has more, but those
2008 * are relatively sparse in text, and khw believes this gives a
2009 * reasonable result, but it could be changed if experience so
2010 * dictates. */
2011 const char longer[] = "ABCDEFGHIJKLMnopqrstuvwxyz";
2012 char * x_longer; /* Transformed 'longer' */
2013 Size_t x_len_longer; /* Length of 'x_longer' */
2014
2015 char * x_shorter; /* We also transform a substring of 'longer' */
2016 Size_t x_len_shorter;
2017
a4a439fb 2018 /* _mem_collxfrm() is used get the transformation (though here we
79f120c8
KW		 2019 * are interested only in its length). It is used because it has
2020 * the intelligence to handle all cases, but to work, it needs some
2021 * values of 'm' and 'b' to get it started. For the purposes of
2022 * this calculation we use a very conservative estimate of 'm' and
2023 * 'b'. This assumes a weight can be multiple bytes, enough to
2024 * hold any UV on the platform, and there are 5 levels, 4 weight
2025 * bytes, and a trailing NUL. */
2026 PL_collxfrm_base = 5;
2027 PL_collxfrm_mult = 5 * sizeof(UV);
2028
2029 /* Find out how long the transformation really is */
a4a439fb
KW		 2030 x_longer = _mem_collxfrm(longer,
2031 sizeof(longer) - 1,
2032 &x_len_longer,
2033
2034 /* We avoid converting to UTF-8 in the
2035 * called function by telling it the
2036 * string is in UTF-8 if the locale is a
2037 * UTF-8 one. Since the string passed
2038 * here is invariant under UTF-8, we can
2039 * claim it's UTF-8 even though it isn't.
2040 * */
2041 PL_in_utf8_COLLATE_locale);
79f120c8
KW		 2042 Safefree(x_longer);
2043
2044 /* Find out how long the transformation of a substring of 'longer'
2045 * is. Together the lengths of these transformations are
2046 * sufficient to calculate 'm' and 'b'. The substring is all of
2047 * 'longer' except the first character. This minimizes the chances
2048 * of being swayed by outliers */
a4a439fb 2049 x_shorter = _mem_collxfrm(longer + 1,
79f120c8 2050 sizeof(longer) - 2,
a4a439fb
KW		 2051 &x_len_shorter,
2052 PL_in_utf8_COLLATE_locale);
79f120c8
KW		 2053 Safefree(x_shorter);
2054
2055 /* If the results are nonsensical for this simple test, the whole
2056 * locale definition is suspect. Mark it so that locale collation
2057 * is not active at all for it. XXX Should we warn? */
2058 if ( x_len_shorter == 0
2059 || x_len_longer == 0
2060 || x_len_shorter >= x_len_longer)
2061 {
2062 PL_collxfrm_mult = 0;
2063 PL_collxfrm_base = 0;
2064 }
2065 else {
2066 SSize_t base; /* Temporary */
2067
2068 /* We have both: m * strlen(longer) + b = x_len_longer
2069 * m * strlen(shorter) + b = x_len_shorter;
2070 * subtracting yields:
2071 * m * (strlen(longer) - strlen(shorter))
2072 * = x_len_longer - x_len_shorter
2073 * But we have set things up so that 'shorter' is 1 byte smaller
2074 * than 'longer'. Hence:
2075 * m = x_len_longer - x_len_shorter
2076 *
2077 * But if something went wrong, make sure the multiplier is at
2078 * least 1.
2079 */
2080 if (x_len_longer > x_len_shorter) {
2081 PL_collxfrm_mult = (STRLEN) x_len_longer - x_len_shorter;
2082 }
2083 else {
2084 PL_collxfrm_mult = 1;
2085 }
2086
2087 /* mx + b = len
2088 * so: b = len - mx
2089 * but in case something has gone wrong, make sure it is
2090 * non-negative */
2091 base = x_len_longer - PL_collxfrm_mult * (sizeof(longer) - 1);
2092 if (base < 0) {
2093 base = 0;
2094 }
2095
2096 /* Add 1 for the trailing NUL */
2097 PL_collxfrm_base = base + 1;
2098 }
58eebef2 2099
7d4bcc4a
KW		 2100# ifdef DEBUGGING
2101
58eebef2
KW		 2102 if (DEBUG_L_TEST || debug_initialization) {
2103 PerlIO_printf(Perl_debug_log,
b07929e4
KW		 2104 "%s:%d: ?UTF-8 locale=%d; x_len_shorter=%zu, "
2105 "x_len_longer=%zu,"
2106 " collate multipler=%zu, collate base=%zu\n",
58eebef2
KW		 2107 __FILE__, __LINE__,
2108 PL_in_utf8_COLLATE_locale,
2109 x_len_shorter, x_len_longer,
2110 PL_collxfrm_mult, PL_collxfrm_base);
2111 }
7d4bcc4a
KW		 2112# endif
2113
98994639
HS		 2114 }
2115 }
2116
2117#endif /* USE_LOCALE_COLLATE */
7d4bcc4a 2118
98994639
HS		 2119}
2120
d36adde0
KW		 2121#endif
2122
d2b24094 2123#ifdef WIN32
b8cc575c 2124
6c332036
TC		 2125#define USE_WSETLOCALE
2126
2127#ifdef USE_WSETLOCALE
2128
2129STATIC char *
2130S_wrap_wsetlocale(pTHX_ int category, const char *locale) {
2131 wchar_t *wlocale;
2132 wchar_t *wresult;
2133 char *result;
2134
2135 if (locale) {
2136 int req_size =
2137 MultiByteToWideChar(CP_UTF8, 0, locale, -1, NULL, 0);
2138
2139 if (!req_size) {
2140 errno = EINVAL;
2141 return NULL;
2142 }
2143
2144 Newx(wlocale, req_size, wchar_t);
2145 if (!MultiByteToWideChar(CP_UTF8, 0, locale, -1, wlocale, req_size)) {
2146 Safefree(wlocale);
2147 errno = EINVAL;
2148 return NULL;
2149 }
2150 }
2151 else {
2152 wlocale = NULL;
2153 }
2154 wresult = _wsetlocale(category, wlocale);
2155 Safefree(wlocale);
2156 if (wresult) {
2157 int req_size =
2158 WideCharToMultiByte(CP_UTF8, 0, wresult, -1, NULL, 0, NULL, NULL);
2159 Newx(result, req_size, char);
2160 SAVEFREEPV(result); /* is there something better we can do here? */
2161 if (!WideCharToMultiByte(CP_UTF8, 0, wresult, -1,
2162 result, req_size, NULL, NULL)) {
2163 errno = EINVAL;
2164 return NULL;
2165 }
2166 }
2167 else {
2168 result = NULL;
2169 }
2170
2171 return result;
2172}
2173
2174#endif
2175
a4f00dcc 2176STATIC char *
b8cc575c 2177S_win32_setlocale(pTHX_ int category, const char* locale)
b385bb4d
KW		 2178{
2179 /* This, for Windows, emulates POSIX setlocale() behavior. There is no
7d4bcc4a
KW		 2180 * difference between the two unless the input locale is "", which normally
2181 * means on Windows to get the machine default, which is set via the
2182 * computer's "Regional and Language Options" (or its current equivalent).
2183 * In POSIX, it instead means to find the locale from the user's
2184 * environment. This routine changes the Windows behavior to first look in
2185 * the environment, and, if anything is found, use that instead of going to
2186 * the machine default. If there is no environment override, the machine
2187 * default is used, by calling the real setlocale() with "".
2188 *
2189 * The POSIX behavior is to use the LC_ALL variable if set; otherwise to
2190 * use the particular category's variable if set; otherwise to use the LANG
2191 * variable. */
b385bb4d 2192
175c4cf9 2193 bool override_LC_ALL = FALSE;
89f7b9aa 2194 char * result;
e5f10d49 2195 unsigned int i;
89f7b9aa 2196
b385bb4d 2197 if (locale && strEQ(locale, "")) {
7d4bcc4a
KW		 2198
2199# ifdef LC_ALL
2200
b385bb4d
KW		 2201 locale = PerlEnv_getenv("LC_ALL");
2202 if (! locale) {
e5f10d49
KW		 2203 if (category == LC_ALL) {
2204 override_LC_ALL = TRUE;
2205 }
2206 else {
7d4bcc4a
KW		 2207
2208# endif
7d4bcc4a 2209
e5f10d49
KW		 2210 for (i = 0; i < NOMINAL_LC_ALL_INDEX; i++) {
2211 if (category == categories[i]) {
2212 locale = PerlEnv_getenv(category_names[i]);
2213 goto found_locale;
2214 }
2215 }
7d4bcc4a 2216
b385bb4d 2217 locale = PerlEnv_getenv("LANG");
481465ea 2218 if (! locale) {
b385bb4d
KW		 2219 locale = "";
2220 }
e5f10d49
KW		 2221
2222 found_locale: ;
7d4bcc4a
KW		 2223
2224# ifdef LC_ALL
2225
e5f10d49 2226 }
b385bb4d 2227 }
7d4bcc4a
KW		 2228
2229# endif
2230
b385bb4d
KW		 2231 }
2232
6c332036
TC		 2233#ifdef USE_WSETLOCALE
2234 result = S_wrap_wsetlocale(aTHX_ category, locale);
2235#else
89f7b9aa 2236 result = setlocale(category, locale);
6c332036 2237#endif
48015184
KW		 2238 DEBUG_L(STMT_START {
2239 dSAVE_ERRNO;
2240 PerlIO_printf(Perl_debug_log, "%s:%d: %s\n", __FILE__, __LINE__,
2241 setlocale_debug_string(category, locale, result));
2242 RESTORE_ERRNO;
2243 } STMT_END);
89f7b9aa 2244
481465ea 2245 if (! override_LC_ALL) {
89f7b9aa
KW		 2246 return result;
2247 }
2248
dfd77d7a 2249 /* Here the input category was LC_ALL, and we have set it to what is in the
481465ea
KW		 2250 * LANG variable or the system default if there is no LANG. But these have
2251 * lower priority than the other LC_foo variables, so override it for each
2252 * one that is set. (If they are set to "", it means to use the same thing
2253 * we just set LC_ALL to, so can skip) */
7d4bcc4a 2254
948523db 2255 for (i = 0; i < LC_ALL_INDEX; i++) {
e5f10d49
KW		 2256 result = PerlEnv_getenv(category_names[i]);
2257 if (result && strNE(result, "")) {
6c332036 2258#ifdef USE_WSETLOCALE
17a1e9ac 2259 S_wrap_wsetlocale(aTHX_ categories[i], result);
6c332036 2260#else
17a1e9ac 2261 setlocale(categories[i], result);
6c332036 2262#endif
e5f10d49
KW		 2263 DEBUG_Lv(PerlIO_printf(Perl_debug_log, "%s:%d: %s\n",
2264 __FILE__, __LINE__,
2265 setlocale_debug_string(categories[i], result, "not captured")));
2266 }
89f7b9aa 2267 }
7d4bcc4a 2268
bbc98134 2269 result = setlocale(LC_ALL, NULL);
48015184
KW		 2270 DEBUG_L(STMT_START {
2271 dSAVE_ERRNO;
2272 PerlIO_printf(Perl_debug_log, "%s:%d: %s\n",
bbc98134 2273 __FILE__, __LINE__,
48015184
KW		 2274 setlocale_debug_string(LC_ALL, NULL, result));
2275 RESTORE_ERRNO;
2276 } STMT_END);
89f7b9aa 2277
bbc98134 2278 return result;
b385bb4d
KW		 2279}
2280
2281#endif
2282
9aac5db8 2283/*
9aac5db8
KW		 2284=for apidoc Perl_setlocale
2285
2286This is an (almost) drop-in replacement for the system L<C<setlocale(3)>>,
2287taking the same parameters, and returning the same information, except that it
9487427b
KW		 2288returns the correct underlying C<LC_NUMERIC> locale. Regular C<setlocale> will
2289instead return C<C> if the underlying locale has a non-dot decimal point
2290character, or a non-empty thousands separator for displaying floating point
2291numbers. This is because perl keeps that locale category such that it has a
2292dot and empty separator, changing the locale briefly during the operations
2293where the underlying one is required. C<Perl_setlocale> knows about this, and
2294compensates; regular C<setlocale> doesn't.
9aac5db8 2295
e9bc6d6b 2296Another reason it isn't completely a drop-in replacement is that it is
9aac5db8 2297declared to return S<C<const char *>>, whereas the system setlocale omits the
163deff3
KW		 2298C<const> (presumably because its API was specified long ago, and can't be
2299updated; it is illegal to change the information C<setlocale> returns; doing
2300so leads to segfaults.)
9aac5db8 2301
e9bc6d6b
KW		 2302Finally, C<Perl_setlocale> works under all circumstances, whereas plain
2303C<setlocale> can be completely ineffective on some platforms under some
2304configurations.
2305
9aac5db8 2306C<Perl_setlocale> should not be used to change the locale except on systems
e9bc6d6b
KW		 2307where the predefined variable C<${^SAFE_LOCALES}> is 1. On some such systems,
2308the system C<setlocale()> is ineffective, returning the wrong information, and
2309failing to actually change the locale. C<Perl_setlocale>, however works
2310properly in all circumstances.
9aac5db8
KW		 2311
2312The return points to a per-thread static buffer, which is overwritten the next
2313time C<Perl_setlocale> is called from the same thread.
2314
2315=cut
2316
2317*/
2318
2319const char *
2320Perl_setlocale(const int category, const char * locale)
a4f00dcc
KW		 2321{
2322 /* This wraps POSIX::setlocale() */
2323
52129632 2324#ifndef USE_LOCALE
d36adde0
KW		 2325
2326 PERL_UNUSED_ARG(category);
2327 PERL_UNUSED_ARG(locale);
2328
2329 return "C";
2330
2331#else
2332
9aac5db8
KW		 2333 const char * retval;
2334 const char * newlocale;
2335 dSAVEDERRNO;
a4f00dcc 2336 dTHX;
d36adde0 2337 DECLARATION_FOR_LC_NUMERIC_MANIPULATION;
a4f00dcc 2338
a4f00dcc
KW		 2339#ifdef USE_LOCALE_NUMERIC
2340
291a84fb
KW		 2341 /* A NULL locale means only query what the current one is. We have the
2342 * LC_NUMERIC name saved, because we are normally switched into the C
9487427b
KW		 2343 * (or equivalent) locale for it. For an LC_ALL query, switch back to get
2344 * the correct results. All other categories don't require special
2345 * handling */
a4f00dcc
KW		 2346 if (locale == NULL) {
2347 if (category == LC_NUMERIC) {
9aac5db8
KW		 2348
2349 /* We don't have to copy this return value, as it is a per-thread
2350 * variable, and won't change until a future setlocale */
2351 return PL_numeric_name;
a4f00dcc
KW		 2352 }
2353
7d4bcc4a 2354# ifdef LC_ALL
a4f00dcc 2355
9aac5db8
KW		 2356 else if (category == LC_ALL) {
2357 STORE_LC_NUMERIC_FORCE_TO_UNDERLYING();
a4f00dcc
KW		 2358 }
2359
7d4bcc4a 2360# endif
a4f00dcc
KW		 2361
2362 }
2363
2364#endif
2365
33e5a354
KW		 2366 retval = save_to_buffer(do_setlocale_r(category, locale),
2367 &PL_setlocale_buf, &PL_setlocale_bufsize, 0);
9aac5db8
KW		 2368 SAVE_ERRNO;
2369
2370#if defined(USE_LOCALE_NUMERIC) && defined(LC_ALL)
2371
2372 if (locale == NULL && category == LC_ALL) {
2373 RESTORE_LC_NUMERIC();
2374 }
2375
2376#endif
a4f00dcc
KW		 2377
2378 DEBUG_L(PerlIO_printf(Perl_debug_log,
2379 "%s:%d: %s\n", __FILE__, __LINE__,
2380 setlocale_debug_string(category, locale, retval)));
7d4bcc4a 2381
9aac5db8
KW		 2382 RESTORE_ERRNO;
2383
2384 if (! retval) {
a4f00dcc
KW		 2385 return NULL;
2386 }
2387
9aac5db8 2388 /* If locale == NULL, we are just querying the state */
a4f00dcc 2389 if (locale == NULL) {
a4f00dcc
KW		 2390 return retval;
2391 }
a4f00dcc 2392
1159483a
KW		 2393 /* Now that have switched locales, we have to update our records to
2394 * correspond. */
a4f00dcc 2395
1159483a 2396 switch (category) {
a4f00dcc 2397
1159483a 2398#ifdef USE_LOCALE_CTYPE
a4f00dcc 2399
1159483a
KW		 2400 case LC_CTYPE:
2401 new_ctype(retval);
2402 break;
a4f00dcc 2403
1159483a 2404#endif
a4f00dcc
KW		 2405#ifdef USE_LOCALE_COLLATE
2406
1159483a
KW		 2407 case LC_COLLATE:
2408 new_collate(retval);
2409 break;
a4f00dcc 2410
1159483a 2411#endif
a4f00dcc
KW		 2412#ifdef USE_LOCALE_NUMERIC
2413
1159483a
KW		 2414 case LC_NUMERIC:
2415 new_numeric(retval);
2416 break;
a4f00dcc 2417
1159483a
KW		 2418#endif
2419#ifdef LC_ALL
a4f00dcc 2420
1159483a 2421 case LC_ALL:
a4f00dcc 2422
1159483a
KW		 2423 /* LC_ALL updates all the things we care about. The values may not
2424 * be the same as 'retval', as the locale "" may have set things
2425 * individually */
a4f00dcc 2426
1159483a 2427# ifdef USE_LOCALE_CTYPE
a4f00dcc 2428
b0bde642 2429 newlocale = savepv(do_setlocale_c(LC_CTYPE, NULL));
1159483a 2430 new_ctype(newlocale);
b0bde642 2431 Safefree(newlocale);
a4f00dcc 2432
1159483a
KW		 2433# endif /* USE_LOCALE_CTYPE */
2434# ifdef USE_LOCALE_COLLATE
2435
b0bde642 2436 newlocale = savepv(do_setlocale_c(LC_COLLATE, NULL));
1159483a 2437 new_collate(newlocale);
b0bde642 2438 Safefree(newlocale);
a4f00dcc 2439
7d4bcc4a 2440# endif
1159483a 2441# ifdef USE_LOCALE_NUMERIC
a4f00dcc 2442
b0bde642 2443 newlocale = savepv(do_setlocale_c(LC_NUMERIC, NULL));
1159483a 2444 new_numeric(newlocale);
b0bde642 2445 Safefree(newlocale);
a4f00dcc 2446
1159483a
KW		 2447# endif /* USE_LOCALE_NUMERIC */
2448#endif /* LC_ALL */
a4f00dcc 2449
1159483a
KW		 2450 default:
2451 break;
a4f00dcc
KW		 2452 }
2453
2454 return retval;
2455
d36adde0
KW		 2456#endif
2457
f7416781
KW		 2458}
2459
2460PERL_STATIC_INLINE const char *
2461S_save_to_buffer(const char * string, char **buf, Size_t *buf_size, const Size_t offset)
2462{
2463 /* Copy the NUL-terminated 'string' to 'buf' + 'offset'. 'buf' has size 'buf_size',
2464 * growing it if necessary */
2465
0b6697c5 2466 Size_t string_size;
f7416781
KW		 2467
2468 PERL_ARGS_ASSERT_SAVE_TO_BUFFER;
2469
0b6697c5
KW		 2470 if (! string) {
2471 return NULL;
2472 }
2473
2474 string_size = strlen(string) + offset + 1;
2475
f7416781
KW		 2476 if (*buf_size == 0) {
2477 Newx(*buf, string_size, char);
2478 *buf_size = string_size;
2479 }
2480 else if (string_size > *buf_size) {
2481 Renew(*buf, string_size, char);
2482 *buf_size = string_size;
2483 }
2484
2485 Copy(string, *buf + offset, string_size - offset, char);
2486 return *buf;
2487}
2488
2489/*
2490
f7416781
KW		 2491=for apidoc Perl_langinfo
2492
ce181bf6 2493This is an (almost) drop-in replacement for the system C<L<nl_langinfo(3)>>,
f7416781
KW		 2494taking the same C<item> parameter values, and returning the same information.
2495But it is more thread-safe than regular C<nl_langinfo()>, and hides the quirks
2496of Perl's locale handling from your code, and can be used on systems that lack
2497a native C<nl_langinfo>.
2498
2499Expanding on these:
2500
2501=over
2502
2503=item *
2504
ce181bf6
KW		 2505The reason it isn't quite a drop-in replacement is actually an advantage. The
2506only difference is that it returns S<C<const char *>>, whereas plain
2507C<nl_langinfo()> returns S<C<char *>>, but you are (only by documentation)
2508forbidden to write into the buffer. By declaring this C<const>, the compiler
2509enforces this restriction, so if it is violated, you know at compilation time,
2510rather than getting segfaults at runtime.
2511
2512=item *
2513
69e2275e 2514It delivers the correct results for the C<RADIXCHAR> and C<THOUSEP> items,
f7416781
KW		 2515without you having to write extra code. The reason for the extra code would be
2516because these are from the C<LC_NUMERIC> locale category, which is normally
9487427b
KW		 2517kept set by Perl so that the radix is a dot, and the separator is the empty
2518string, no matter what the underlying locale is supposed to be, and so to get
2519the expected results, you have to temporarily toggle into the underlying
2520locale, and later toggle back. (You could use plain C<nl_langinfo> and
2521C<L</STORE_LC_NUMERIC_FORCE_TO_UNDERLYING>> for this but then you wouldn't get
2522the other advantages of C<Perl_langinfo()>; not keeping C<LC_NUMERIC> in the C
2523(or equivalent) locale would break a lot of CPAN, which is expecting the radix
2524(decimal point) character to be a dot.)
ce181bf6
KW		 2525
2526=item *
2527
2528The system function it replaces can have its static return buffer trashed,
f1460a66 2529not only by a subsequent call to that function, but by a C<freelocale>,
ce181bf6
KW		 2530C<setlocale>, or other locale change. The returned buffer of this function is
2531not changed until the next call to it, so the buffer is never in a trashed
2532state.
f7416781
KW		 2533
2534=item *
2535
ce181bf6
KW		 2536Its return buffer is per-thread, so it also is never overwritten by a call to
2537this function from another thread; unlike the function it replaces.
2538
2539=item *
2540
2541But most importantly, it works on systems that don't have C<nl_langinfo>, such
2542as Windows, hence makes your code more portable. Of the fifty-some possible
2543items specified by the POSIX 2008 standard,
f7416781 2544L<http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/langinfo.h.html>,
8d72e74e
KW		 2545only one is completely unimplemented, though on non-Windows platforms, another
2546significant one is also not implemented). It uses various techniques to
2547recover the other items, including calling C<L<localeconv(3)>>, and
2548C<L<strftime(3)>>, both of which are specified in C89, so should be always be
2549available. Later C<strftime()> versions have additional capabilities; C<""> is
2550returned for those not available on your system.
ce181bf6
KW		 2551
2552It is important to note that when called with an item that is recovered by
2553using C<localeconv>, the buffer from any previous explicit call to
2554C<localeconv> will be overwritten. This means you must save that buffer's
c3997e39
KW		 2555contents if you need to access them after a call to this function. (But note
2556that you might not want to be using C<localeconv()> directly anyway, because of
2557issues like the ones listed in the second item of this list (above) for
2558C<RADIXCHAR> and C<THOUSEP>. You can use the methods given in L<perlcall> to
2559call L<POSIX/localeconv> and avoid all the issues, but then you have a hash to
2560unpack).
9f0bc911 2561
6201c220
KW		 2562The details for those items which may deviate from what this emulation returns
2563and what a native C<nl_langinfo()> would return are specified in
2564L<I18N::Langinfo>.
f7416781 2565
ce181bf6
KW		 2566=back
2567
f7416781
KW		 2568When using C<Perl_langinfo> on systems that don't have a native
2569C<nl_langinfo()>, you must
2570
2571 #include "perl_langinfo.h"
2572
2573before the C<perl.h> C<#include>. You can replace your C<langinfo.h>
2574C<#include> with this one. (Doing it this way keeps out the symbols that plain
c3997e39
KW		 2575C<langinfo.h> would try to import into the namespace for code that doesn't need
2576it.)
f7416781 2577
f7416781
KW		 2578The original impetus for C<Perl_langinfo()> was so that code that needs to
2579find out the current currency symbol, floating point radix character, or digit
2580grouping separator can use, on all systems, the simpler and more
2581thread-friendly C<nl_langinfo> API instead of C<L<localeconv(3)>> which is a
2582pain to make thread-friendly. For other fields returned by C<localeconv>, it
2583is better to use the methods given in L<perlcall> to call
2584L<C<POSIX::localeconv()>|POSIX/localeconv>, which is thread-friendly.
2585
2586=cut
2587
2588*/
2589
2590const char *
2591#ifdef HAS_NL_LANGINFO
2592Perl_langinfo(const nl_item item)
2593#else
2594Perl_langinfo(const int item)
2595#endif
2596{
f61748ac
KW		 2597 return my_nl_langinfo(item, TRUE);
2598}
2599
59a15af0 2600STATIC const char *
f61748ac
KW		 2601#ifdef HAS_NL_LANGINFO
2602S_my_nl_langinfo(const nl_item item, bool toggle)
2603#else
2604S_my_nl_langinfo(const int item, bool toggle)
2605#endif
2606{
ae74815b 2607 dTHX;
0b6697c5 2608 const char * retval;
f7416781 2609
d36adde0
KW		 2610#ifdef USE_LOCALE_NUMERIC
2611
5a854ab3
KW		 2612 /* We only need to toggle into the underlying LC_NUMERIC locale for these
2613 * two items, and only if not already there */
4e6826bf 2614 if (toggle && (( item != RADIXCHAR && item != THOUSEP)
5a854ab3 2615 || PL_numeric_underlying))
d36adde0
KW		 2616
2617#endif /* No toggling needed if not using LC_NUMERIC */
2618
5a854ab3 2619 toggle = FALSE;
5a854ab3 2620
ab340fff 2621#if defined(HAS_NL_LANGINFO) /* nl_langinfo() is available. */
ee90eb2d 2622# if ! defined(HAS_THREAD_SAFE_NL_LANGINFO_L) \
80306bb6 2623 || ! defined(HAS_POSIX_2008_LOCALE) \
9289d4dc 2624 || ! defined(HAS_DUPLOCALE)
f7416781 2625
ab340fff 2626 /* Here, use plain nl_langinfo(), switching to the underlying LC_NUMERIC
ae74815b
KW		 2627 * for those items dependent on it. This must be copied to a buffer before
2628 * switching back, as some systems destroy the buffer when setlocale() is
2629 * called */
f7416781 2630
038d3702
KW		 2631 {
2632 DECLARATION_FOR_LC_NUMERIC_MANIPULATION;
2633
b2fee59c 2634 if (toggle) {
038d3702 2635 STORE_LC_NUMERIC_FORCE_TO_UNDERLYING();
b2fee59c 2636 }
f7416781 2637
5acc4454
KW		 2638 LOCALE_LOCK; /* Prevent interference from another thread executing
2639 this code section (the only call to nl_langinfo in
2640 the core) */
2641
ee90eb2d 2642
628ff75a
KW		 2643 /* Copy to a per-thread buffer, which is also one that won't be
2644 * destroyed by a subsequent setlocale(), such as the
2645 * RESTORE_LC_NUMERIC may do just below. */
0b6697c5
KW		 2646 retval = save_to_buffer(nl_langinfo(item),
2647 &PL_langinfo_buf, &PL_langinfo_bufsize, 0);
f7416781 2648
5acc4454
KW		 2649 LOCALE_UNLOCK;
2650
b2fee59c 2651 if (toggle) {
038d3702 2652 RESTORE_LC_NUMERIC();
b2fee59c 2653 }
f7416781
KW		 2654 }
2655
ab340fff
KW		 2656# else /* Use nl_langinfo_l(), avoiding both a mutex and changing the locale */
2657
5a854ab3 2658 {
b2fee59c
KW		 2659 bool do_free = FALSE;
2660 locale_t cur = uselocale((locale_t) 0);
ab340fff 2661
b2fee59c
KW		 2662 if (cur == LC_GLOBAL_LOCALE) {
2663 cur = duplocale(LC_GLOBAL_LOCALE);
2664 do_free = TRUE;
2665 }
ab340fff 2666
d36adde0
KW		 2667# ifdef USE_LOCALE_NUMERIC
2668
b2fee59c 2669 if (toggle) {
e1aa2579
KW		 2670 if (PL_underlying_numeric_obj) {
2671 cur = PL_underlying_numeric_obj;
2672 }
2673 else {
2674 cur = newlocale(LC_NUMERIC_MASK, PL_numeric_name, cur);
2675 do_free = TRUE;
2676 }
b2fee59c 2677 }
ab340fff 2678
d36adde0
KW		 2679# endif
2680
628ff75a
KW		 2681 /* We have to save it to a buffer, because the freelocale() just below
2682 * can invalidate the internal one */
0b6697c5
KW		 2683 retval = save_to_buffer(nl_langinfo_l(item, cur),
2684 &PL_langinfo_buf, &PL_langinfo_bufsize, 0);
ee90eb2d 2685
b2fee59c
KW		 2686 if (do_free) {
2687 freelocale(cur);
2688 }
5a854ab3 2689 }
ab340fff 2690
c1566110
KW		 2691# endif
2692
0b6697c5 2693 if (strEQ(retval, "")) {
4e6826bf 2694 if (item == YESSTR) {
c1566110
KW		 2695 return "yes";
2696 }
4e6826bf 2697 if (item == NOSTR) {
c1566110
KW		 2698 return "no";
2699 }
2700 }
2701
0b6697c5 2702 return retval;
ab340fff 2703
f7416781 2704#else /* Below, emulate nl_langinfo as best we can */
43dd6b15
KW		 2705
2706 {
2707
f7416781
KW		 2708# ifdef HAS_LOCALECONV
2709
43dd6b15 2710 const struct lconv* lc;
628ff75a 2711 const char * temp;
038d3702 2712 DECLARATION_FOR_LC_NUMERIC_MANIPULATION;
f7416781 2713
69c5e0db
KW		 2714# ifdef TS_W32_BROKEN_LOCALECONV
2715
2716 const char * save_global;
2717 const char * save_thread;
2718 int needed_size;
2719 char * ptr;
2720 char * e;
2721 char * item_start;
2722
2723# endif
f7416781
KW		 2724# endif
2725# ifdef HAS_STRFTIME
2726
43dd6b15
KW		 2727 struct tm tm;
2728 bool return_format = FALSE; /* Return the %format, not the value */
2729 const char * format;
f7416781
KW		 2730
2731# endif
2732
43dd6b15
KW		 2733 /* We copy the results to a per-thread buffer, even if not
2734 * multi-threaded. This is in part to simplify this code, and partly
2735 * because we need a buffer anyway for strftime(), and partly because a
2736 * call of localeconv() could otherwise wipe out the buffer, and the
2737 * programmer would not be expecting this, as this is a nl_langinfo()
2738 * substitute after all, so s/he might be thinking their localeconv()
2739 * is safe until another localeconv() call. */
f7416781 2740
43dd6b15
KW		 2741 switch (item) {
2742 Size_t len;
f7416781 2743
8d72e74e 2744 /* This is unimplemented */
4e6826bf 2745 case ERA: /* For use with strftime() %E modifier */
f7416781 2746
43dd6b15
KW		 2747 default:
2748 return "";
f7416781 2749
43dd6b15 2750 /* We use only an English set, since we don't know any more */
4e6826bf
KW		 2751 case YESEXPR: return "^[+1yY]";
2752 case YESSTR: return "yes";
2753 case NOEXPR: return "^[-0nN]";
2754 case NOSTR: return "no";
2755
8d72e74e
KW		 2756 case CODESET:
2757
2758# ifndef WIN32
2759
2760 /* On non-windows, this is unimplemented, in part because of
2761 * inconsistencies between vendors. The Darwin native
2762 * nl_langinfo() implementation simply looks at everything past
2763 * any dot in the name, but that doesn't work for other
2764 * vendors. Many Linux locales that don't have UTF-8 in their
2765 * names really are UTF-8, for example; z/OS locales that do
2766 * have UTF-8 in their names, aren't really UTF-8 */
2767 return "";
2768
2769# else
2770
2771 { /* But on Windows, the name does seem to be consistent, so
2772 use that. */
2773 const char * p;
2774 const char * first;
2775 Size_t offset = 0;
2776 const char * name = my_setlocale(LC_CTYPE, NULL);
2777
2778 if (isNAME_C_OR_POSIX(name)) {
2779 return "ANSI_X3.4-1968";
2780 }
2781
2782 /* Find the dot in the locale name */
2783 first = (const char *) strchr(name, '.');
2784 if (! first) {
2785 first = name;
2786 goto has_nondigit;
2787 }
2788
2789 /* Look at everything past the dot */
2790 first++;
2791 p = first;
2792
2793 while (*p) {
2794 if (! isDIGIT(*p)) {
2795 goto has_nondigit;
2796 }
2797
2798 p++;
2799 }
2800
2801 /* Here everything past the dot is a digit. Treat it as a
2802 * code page */
18503cbd 2803 retval = save_to_buffer("CP", &PL_langinfo_buf,
32a62865 2804 &PL_langinfo_bufsize, 0);
8d72e74e 2805 offset = STRLENs("CP");
f7416781 2806
8d72e74e
KW		 2807 has_nondigit:
2808
2809 retval = save_to_buffer(first, &PL_langinfo_buf,
2810 &PL_langinfo_bufsize, offset);
2811 }
2812
2813 break;
2814
2815# endif
f7416781
KW		 2816# ifdef HAS_LOCALECONV
2817
4e6826bf 2818 case CRNCYSTR:
f7416781 2819
43dd6b15
KW		 2820 /* We don't bother with localeconv_l() because any system that
2821 * has it is likely to also have nl_langinfo() */
291a84fb 2822
69c5e0db
KW		 2823 LOCALE_LOCK_V; /* Prevent interference with other threads
2824 using localeconv() */
2825
2826# ifdef TS_W32_BROKEN_LOCALECONV
2827
2828 /* This is a workaround for a Windows bug prior to VS 15.
2829 * What we do here is, while locked, switch to the global
2830 * locale so localeconv() works; then switch back just before
2831 * the unlock. This can screw things up if some thread is
2832 * already using the global locale while assuming no other is.
2833 * A different workaround would be to call GetCurrencyFormat on
2834 * a known value, and parse it; patches welcome
2835 *
2836 * We have to use LC_ALL instead of LC_MONETARY because of
2837 * another bug in Windows */
2838
2839 save_thread = savepv(my_setlocale(LC_ALL, NULL));
2840 _configthreadlocale(_DISABLE_PER_THREAD_LOCALE);
2841 save_global= savepv(my_setlocale(LC_ALL, NULL));
2842 my_setlocale(LC_ALL, save_thread);
2843
2844# endif
5acc4454 2845
43dd6b15
KW		 2846 lc = localeconv();
2847 if ( ! lc
2848 || ! lc->currency_symbol
2849 || strEQ("", lc->currency_symbol))
2850 {
69c5e0db 2851 LOCALE_UNLOCK_V;
43dd6b15
KW		 2852 return "";
2853 }
f7416781 2854
43dd6b15 2855 /* Leave the first spot empty to be filled in below */
0b6697c5
KW		 2856 retval = save_to_buffer(lc->currency_symbol, &PL_langinfo_buf,
2857 &PL_langinfo_bufsize, 1);
43dd6b15
KW		 2858 if (lc->mon_decimal_point && strEQ(lc->mon_decimal_point, ""))
2859 { /* khw couldn't figure out how the localedef specifications
2860 would show that the $ should replace the radix; this is
2861 just a guess as to how it might work.*/
a34edee3 2862 PL_langinfo_buf[0] = '.';
43dd6b15
KW		 2863 }
2864 else if (lc->p_cs_precedes) {
a34edee3 2865 PL_langinfo_buf[0] = '-';
43dd6b15
KW		 2866 }
2867 else {
a34edee3 2868 PL_langinfo_buf[0] = '+';
43dd6b15 2869 }
f7416781 2870
69c5e0db
KW		 2871# ifdef TS_W32_BROKEN_LOCALECONV
2872
2873 my_setlocale(LC_ALL, save_global);
2874 _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
2875 my_setlocale(LC_ALL, save_thread);
2876 Safefree(save_global);
2877 Safefree(save_thread);
2878
2879# endif
2880
2881 LOCALE_UNLOCK_V;
43dd6b15 2882 break;
f7416781 2883
69c5e0db
KW		 2884# ifdef TS_W32_BROKEN_LOCALECONV
2885
4e6826bf 2886 case RADIXCHAR:
69c5e0db
KW		 2887
2888 /* For this, we output a known simple floating point number to
2889 * a buffer, and parse it, looking for the radix */
2890
2891 if (toggle) {
2892 STORE_LC_NUMERIC_FORCE_TO_UNDERLYING();
2893 }
2894
2895 if (PL_langinfo_bufsize < 10) {
2896 PL_langinfo_bufsize = 10;
2897 Renew(PL_langinfo_buf, PL_langinfo_bufsize, char);
2898 }
2899
2900 needed_size = my_snprintf(PL_langinfo_buf, PL_langinfo_bufsize,
2901 "%.1f", 1.5);
2902 if (needed_size >= (int) PL_langinfo_bufsize) {
2903 PL_langinfo_bufsize = needed_size + 1;
2904 Renew(PL_langinfo_buf, PL_langinfo_bufsize, char);
2905 needed_size = my_snprintf(PL_langinfo_buf, PL_langinfo_bufsize,
2906 "%.1f", 1.5);
2907 assert(needed_size < (int) PL_langinfo_bufsize);
2908 }
2909
2910 ptr = PL_langinfo_buf;
2911 e = PL_langinfo_buf + PL_langinfo_bufsize;
2912
2913 /* Find the '1' */
2914 while (ptr < e && *ptr != '1') {
2915 ptr++;
2916 }
2917 ptr++;
2918
2919 /* Find the '5' */
2920 item_start = ptr;
2921 while (ptr < e && *ptr != '5') {
2922 ptr++;
2923 }
2924
2925 /* Everything in between is the radix string */
2926 if (ptr >= e) {
2927 PL_langinfo_buf[0] = '?';
2928 PL_langinfo_buf[1] = '\0';
2929 }
2930 else {
2931 *ptr = '\0';
2932 Move(item_start, PL_langinfo_buf, ptr - PL_langinfo_buf, char);
2933 }
2934
2935 if (toggle) {
2936 RESTORE_LC_NUMERIC();
2937 }
2938
2939 retval = PL_langinfo_buf;
2940 break;
2941
2942# else
2943
2944 case RADIXCHAR: /* No special handling needed */
2945
2946# endif
2947
4e6826bf 2948 case THOUSEP:
f7416781 2949
43dd6b15 2950 if (toggle) {
038d3702 2951 STORE_LC_NUMERIC_FORCE_TO_UNDERLYING();
c0d737a8 2952 }
f7416781 2953
69c5e0db
KW		 2954 LOCALE_LOCK_V; /* Prevent interference with other threads
2955 using localeconv() */
2956
2957# ifdef TS_W32_BROKEN_LOCALECONV
2958
2959 /* This should only be for the thousands separator. A
2960 * different work around would be to use GetNumberFormat on a
2961 * known value and parse the result to find the separator */
2962 save_thread = savepv(my_setlocale(LC_ALL, NULL));
2963 _configthreadlocale(_DISABLE_PER_THREAD_LOCALE);
2964 save_global = savepv(my_setlocale(LC_ALL, NULL));
2965 my_setlocale(LC_ALL, save_thread);
2966# if 0
2967 /* This is the start of code that for broken Windows replaces
2968 * the above and below code, and instead calls
2969 * GetNumberFormat() and then would parse that to find the
2970 * thousands separator. It needs to handle UTF-16 vs -8
2971 * issues. */
2972
2973 needed_size = GetNumberFormatEx(PL_numeric_name, 0, "1234.5", NULL, PL_langinfo_buf, PL_langinfo_bufsize);
2974 DEBUG_L(PerlIO_printf(Perl_debug_log,
2975 "%s: %d: return from GetNumber, count=%d, val=%s\n",
2976 __FILE__, __LINE__, needed_size, PL_langinfo_buf));
2977
2978# endif
2979# endif
5acc4454 2980
43dd6b15
KW		 2981 lc = localeconv();
2982 if (! lc) {
628ff75a 2983 temp = "";
33394adc 2984 }
43dd6b15 2985 else {
4e6826bf 2986 temp = (item == RADIXCHAR)
43dd6b15
KW		 2987 ? lc->decimal_point
2988 : lc->thousands_sep;
628ff75a
KW		 2989 if (! temp) {
2990 temp = "";
43dd6b15
KW		 2991 }
2992 }
f7416781 2993
0b6697c5
KW		 2994 retval = save_to_buffer(temp, &PL_langinfo_buf,
2995 &PL_langinfo_bufsize, 0);
f7416781 2996
69c5e0db
KW		 2997# ifdef TS_W32_BROKEN_LOCALECONV
2998
2999 my_setlocale(LC_ALL, save_global);
3000 _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
3001 my_setlocale(LC_ALL, save_thread);
3002 Safefree(save_global);
3003 Safefree(save_thread);
3004
3005# endif
3006
3007 LOCALE_UNLOCK_V;
5acc4454 3008
43dd6b15 3009 if (toggle) {
038d3702 3010 RESTORE_LC_NUMERIC();
43dd6b15 3011 }
f7416781 3012
43dd6b15 3013 break;
f7416781
KW		 3014
3015# endif
3016# ifdef HAS_STRFTIME
3017
43dd6b15
KW		 3018 /* These are defined by C89, so we assume that strftime supports
3019 * them, and so are returned unconditionally; they may not be what
3020 * the locale actually says, but should give good enough results
3021 * for someone using them as formats (as opposed to trying to parse
3022 * them to figure out what the locale says). The other format
3023 * items are actually tested to verify they work on the platform */
4e6826bf
KW		 3024 case D_FMT: return "%x";
3025 case T_FMT: return "%X";
3026 case D_T_FMT: return "%c";
43dd6b15
KW		 3027
3028 /* These formats are only available in later strfmtime's */
4e6826bf 3029 case ERA_D_FMT: case ERA_T_FMT: case ERA_D_T_FMT: case T_FMT_AMPM:
43dd6b15
KW		 3030
3031 /* The rest can be gotten from most versions of strftime(). */
4e6826bf
KW		 3032 case ABDAY_1: case ABDAY_2: case ABDAY_3:
3033 case ABDAY_4: case ABDAY_5: case ABDAY_6: case ABDAY_7:
3034 case ALT_DIGITS:
3035 case AM_STR: case PM_STR:
3036 case ABMON_1: case ABMON_2: case ABMON_3: case ABMON_4:
3037 case ABMON_5: case ABMON_6: case ABMON_7: case ABMON_8:
3038 case ABMON_9: case ABMON_10: case ABMON_11: case ABMON_12:
3039 case DAY_1: case DAY_2: case DAY_3: case DAY_4:
3040 case DAY_5: case DAY_6: case DAY_7:
3041 case MON_1: case MON_2: case MON_3: case MON_4:
3042 case MON_5: case MON_6: case MON_7: case MON_8:
3043 case MON_9: case MON_10: case MON_11: case MON_12:
43dd6b15
KW		 3044
3045 LOCALE_LOCK;
3046
3047 init_tm(&tm); /* Precaution against core dumps */
3048 tm.tm_sec = 30;
3049 tm.tm_min = 30;
3050 tm.tm_hour = 6;
3051 tm.tm_year = 2017 - 1900;
3052 tm.tm_wday = 0;
3053 tm.tm_mon = 0;
3054 switch (item) {
3055 default:
3056 LOCALE_UNLOCK;
3057 Perl_croak(aTHX_
3058 "panic: %s: %d: switch case: %d problem",
3059 __FILE__, __LINE__, item);
3060 NOT_REACHED; /* NOTREACHED */
3061
4e6826bf
KW		 3062 case PM_STR: tm.tm_hour = 18;
3063 case AM_STR:
43dd6b15
KW		 3064 format = "%p";
3065 break;
3066
4e6826bf
KW		 3067 case ABDAY_7: tm.tm_wday++;
3068 case ABDAY_6: tm.tm_wday++;
3069 case ABDAY_5: tm.tm_wday++;
3070 case ABDAY_4: tm.tm_wday++;
3071 case ABDAY_3: tm.tm_wday++;
3072 case ABDAY_2: tm.tm_wday++;
3073 case ABDAY_1:
43dd6b15
KW		 3074 format = "%a";
3075 break;
3076
4e6826bf
KW		 3077 case DAY_7: tm.tm_wday++;
3078 case DAY_6: tm.tm_wday++;
3079 case DAY_5: tm.tm_wday++;
3080 case DAY_4: tm.tm_wday++;
3081 case DAY_3: tm.tm_wday++;
3082 case DAY_2: tm.tm_wday++;
3083 case DAY_1:
43dd6b15
KW		 3084 format = "%A";
3085 break;
3086
4e6826bf
KW		 3087 case ABMON_12: tm.tm_mon++;
3088 case ABMON_11: tm.tm_mon++;
3089 case ABMON_10: tm.tm_mon++;
3090 case ABMON_9: tm.tm_mon++;
3091 case ABMON_8: tm.tm_mon++;
3092 case ABMON_7: tm.tm_mon++;
3093 case ABMON_6: tm.tm_mon++;
3094 case ABMON_5: tm.tm_mon++;
3095 case ABMON_4: tm.tm_mon++;
3096 case ABMON_3: tm.tm_mon++;
3097 case ABMON_2: tm.tm_mon++;
3098 case ABMON_1:
43dd6b15
KW		 3099 format = "%b";
3100 break;
3101
4e6826bf
KW		 3102 case MON_12: tm.tm_mon++;
3103 case MON_11: tm.tm_mon++;
3104 case MON_10: tm.tm_mon++;
3105 case MON_9: tm.tm_mon++;
3106 case MON_8: tm.tm_mon++;
3107 case MON_7: tm.tm_mon++;
3108 case MON_6: tm.tm_mon++;
3109 case MON_5: tm.tm_mon++;
3110 case MON_4: tm.tm_mon++;
3111 case MON_3: tm.tm_mon++;
3112 case MON_2: tm.tm_mon++;
3113 case MON_1:
43dd6b15
KW		 3114 format = "%B";
3115 break;
3116
4e6826bf 3117 case T_FMT_AMPM:
43dd6b15
KW		 3118 format = "%r";
3119 return_format = TRUE;
3120 break;
3121
4e6826bf 3122 case ERA_D_FMT:
43dd6b15
KW		 3123 format = "%Ex";
3124 return_format = TRUE;
3125 break;
3126
4e6826bf 3127 case ERA_T_FMT:
43dd6b15
KW		 3128 format = "%EX";
3129 return_format = TRUE;
3130 break;
3131
4e6826bf 3132 case ERA_D_T_FMT:
43dd6b15
KW		 3133 format = "%Ec";
3134 return_format = TRUE;
3135 break;
3136
4e6826bf 3137 case ALT_DIGITS:
43dd6b15
KW		 3138 tm.tm_wday = 0;
3139 format = "%Ow"; /* Find the alternate digit for 0 */
3140 break;
3141 }
f7416781 3142
43dd6b15
KW		 3143 /* We can't use my_strftime() because it doesn't look at
3144 * tm_wday */
3145 while (0 == strftime(PL_langinfo_buf, PL_langinfo_bufsize,
3146 format, &tm))
3147 {
3148 /* A zero return means one of:
3149 * a) there wasn't enough space in PL_langinfo_buf
3150 * b) the format, like a plain %p, returns empty
3151 * c) it was an illegal format, though some
3152 * implementations of strftime will just return the
3153 * illegal format as a plain character sequence.
3154 *
3155 * To quickly test for case 'b)', try again but precede
3156 * the format with a plain character. If that result is
3157 * still empty, the problem is either 'a)' or 'c)' */
3158
3159 Size_t format_size = strlen(format) + 1;
3160 Size_t mod_size = format_size + 1;
3161 char * mod_format;
3162 char * temp_result;
3163
3164 Newx(mod_format, mod_size, char);
3165 Newx(temp_result, PL_langinfo_bufsize, char);
6873aa47 3166 *mod_format = ' ';
43dd6b15
KW		 3167 my_strlcpy(mod_format + 1, format, mod_size);
3168 len = strftime(temp_result,
3169 PL_langinfo_bufsize,
3170 mod_format, &tm);
3171 Safefree(mod_format);
3172 Safefree(temp_result);
3173
3174 /* If 'len' is non-zero, it means that we had a case like
3175 * %p which means the current locale doesn't use a.m. or
3176 * p.m., and that is valid */
3177 if (len == 0) {
3178
3179 /* Here, still didn't work. If we get well beyond a
3180 * reasonable size, bail out to prevent an infinite
3181 * loop. */
3182
3183 if (PL_langinfo_bufsize > 100 * format_size) {
3184 *PL_langinfo_buf = '\0';
3185 }
3186 else {
3187 /* Double the buffer size to retry; Add 1 in case
3188 * original was 0, so we aren't stuck at 0. */
3189 PL_langinfo_bufsize *= 2;
3190 PL_langinfo_bufsize++;
3191 Renew(PL_langinfo_buf, PL_langinfo_bufsize, char);
3192 continue;
3193 }
3194 }
f7416781 3195
f7416781 3196 break;
43dd6b15 3197 }
f7416781 3198
43dd6b15
KW		 3199 /* Here, we got a result.
3200 *
3201 * If the item is 'ALT_DIGITS', PL_langinfo_buf contains the
3202 * alternate format for wday 0. If the value is the same as
3203 * the normal 0, there isn't an alternate, so clear the buffer.
3204 * */
4e6826bf 3205 if ( item == ALT_DIGITS
43dd6b15
KW		 3206 && strEQ(PL_langinfo_buf, "0"))
3207 {
3208 *PL_langinfo_buf = '\0';
3209 }
f7416781 3210
43dd6b15
KW		 3211 /* ALT_DIGITS is problematic. Experiments on it showed that
3212 * strftime() did not always work properly when going from
3213 * alt-9 to alt-10. Only a few locales have this item defined,
3214 * and in all of them on Linux that khw was able to find,
3215 * nl_langinfo() merely returned the alt-0 character, possibly
3216 * doubled. Most Unicode digits are in blocks of 10
3217 * consecutive code points, so that is sufficient information
3218 * for those scripts, as we can infer alt-1, alt-2, .... But
3219 * for a Japanese locale, a CJK ideographic 0 is returned, and
3220 * the CJK digits are not in code point order, so you can't
3221 * really infer anything. The localedef for this locale did
3222 * specify the succeeding digits, so that strftime() works
3223 * properly on them, without needing to infer anything. But
3224 * the nl_langinfo() return did not give sufficient information
3225 * for the caller to understand what's going on. So until
3226 * there is evidence that it should work differently, this
3227 * returns the alt-0 string for ALT_DIGITS.
3228 *
3229 * wday was chosen because its range is all a single digit.
3230 * Things like tm_sec have two digits as the minimum: '00' */
f7416781 3231
43dd6b15 3232 LOCALE_UNLOCK;
f7416781 3233
d1b150d9
KW		 3234 retval = PL_langinfo_buf;
3235
43dd6b15
KW		 3236 /* If to return the format, not the value, overwrite the buffer
3237 * with it. But some strftime()s will keep the original format
3238 * if illegal, so change those to "" */
3239 if (return_format) {
3240 if (strEQ(PL_langinfo_buf, format)) {
f7416781
KW		 3241 *PL_langinfo_buf = '\0';
3242 }
43dd6b15 3243 else {
0b6697c5
KW		 3244 retval = save_to_buffer(format, &PL_langinfo_buf,
3245 &PL_langinfo_bufsize, 0);
f7416781
KW		 3246 }
3247 }
3248
3249 break;
f7416781
KW		 3250
3251# endif
3252
43dd6b15 3253 }
f7416781
KW		 3254 }
3255
0b6697c5 3256 return retval;
f7416781
KW		 3257
3258#endif
3259
a4f00dcc 3260}
b385bb4d 3261
98994639
HS		 3262/*
3263 * Initialize locale awareness.
3264 */
3265int
3266Perl_init_i18nl10n(pTHX_ int printwarn)
3267{
0e92a118
KW		 3268 /* printwarn is
3269 *
3270 * 0 if not to output warning when setup locale is bad
3271 * 1 if to output warning based on value of PERL_BADLANG
3272 * >1 if to output regardless of PERL_BADLANG
3273 *
3274 * returns
98994639 3275 * 1 = set ok or not applicable,
0e92a118
KW		 3276 * 0 = fallback to a locale of lower priority
3277 * -1 = fallback to all locales failed, not even to the C locale
6b058d42
KW		 3278 *
3279 * Under -DDEBUGGING, if the environment variable PERL_DEBUG_LOCALE_INIT is
3280 * set, debugging information is output.
3281 *
3282 * This looks more complicated than it is, mainly due to the #ifdefs.
3283 *
3284 * We try to set LC_ALL to the value determined by the environment. If
3285 * there is no LC_ALL on this platform, we try the individual categories we
3286 * know about. If this works, we are done.
3287 *
3288 * But if it doesn't work, we have to do something else. We search the
3289 * environment variables ourselves instead of relying on the system to do
3290 * it. We look at, in order, LC_ALL, LANG, a system default locale (if we
3291 * think there is one), and the ultimate fallback "C". This is all done in
3292 * the same loop as above to avoid duplicating code, but it makes things
7d4bcc4a
KW		 3293 * more complex. The 'trial_locales' array is initialized with just one
3294 * element; it causes the behavior described in the paragraph above this to
3295 * happen. If that fails, we add elements to 'trial_locales', and do extra
3296 * loop iterations to cause the behavior described in this paragraph.
6b058d42
KW		 3297 *
3298 * On Ultrix, the locale MUST come from the environment, so there is
3299 * preliminary code to set it. I (khw) am not sure that it is necessary,
3300 * and that this couldn't be folded into the loop, but barring any real
3301 * platforms to test on, it's staying as-is
3302 *
3303 * A slight complication is that in embedded Perls, the locale may already
3304 * be set-up, and we don't want to get it from the normal environment
3305 * variables. This is handled by having a special environment variable
3306 * indicate we're in this situation. We simply set setlocale's 2nd
3307 * parameter to be a NULL instead of "". That indicates to setlocale that
3308 * it is not to change anything, but to return the current value,
3309 * effectively initializing perl's db to what the locale already is.
3310 *
3311 * We play the same trick with NULL if a LC_ALL succeeds. We call
3312 * setlocale() on the individual categores with NULL to get their existing
3313 * values for our db, instead of trying to change them.
3314 * */
98994639 3315
1565c085 3316
0e92a118
KW		 3317 int ok = 1;
3318
7d4bcc4a
KW		 3319#ifndef USE_LOCALE
3320
3321 PERL_UNUSED_ARG(printwarn);
3322
3323#else /* USE_LOCALE */
7d4bcc4a
KW		 3324# ifdef __GLIBC__
3325
24f3e849 3326 const char * const language = PerlEnv_getenv("LANGUAGE");
7d4bcc4a
KW		 3327
3328# endif
65ebb059 3329
ccd65d51
KW		 3330 /* NULL uses the existing already set up locale */
3331 const char * const setlocale_init = (PerlEnv_getenv("PERL_SKIP_LOCALE_INIT"))
3332 ? NULL
3333 : "";
c3fcd832
KW		 3334 const char* trial_locales[5]; /* 5 = 1 each for "", LC_ALL, LANG, "", C */
3335 unsigned int trial_locales_count;
24f3e849
KW		 3336 const char * const lc_all = PerlEnv_getenv("LC_ALL");
3337 const char * const lang = PerlEnv_getenv("LANG");
98994639 3338 bool setlocale_failure = FALSE;
65ebb059 3339 unsigned int i;
175c4cf9
KW		 3340
3341 /* A later getenv() could zap this, so only use here */
3342 const char * const bad_lang_use_once = PerlEnv_getenv("PERL_BADLANG");
3343
3344 const bool locwarn = (printwarn > 1
e5f10d49
KW		 3345 || ( printwarn
3346 && ( ! bad_lang_use_once
22ff3130 3347 || (
e5f10d49
KW		 3348 /* disallow with "" or "0" */
3349 *bad_lang_use_once
3350 && strNE("0", bad_lang_use_once)))));
ea92aad8 3351
291a84fb 3352 /* setlocale() return vals; not copied so must be looked at immediately */
8de4332b 3353 const char * sl_result[NOMINAL_LC_ALL_INDEX + 1];
291a84fb
KW		 3354
3355 /* current locale for given category; should have been copied so aren't
3356 * volatile */
8de4332b 3357 const char * curlocales[NOMINAL_LC_ALL_INDEX + 1];
291a84fb 3358
7d4bcc4a
KW		 3359# ifdef WIN32
3360
6bce99ee
JH		 3361 /* In some systems you can find out the system default locale
3362 * and use that as the fallback locale. */
7d4bcc4a
KW		 3363# define SYSTEM_DEFAULT_LOCALE
3364# endif
3365# ifdef SYSTEM_DEFAULT_LOCALE
3366
65ebb059 3367 const char *system_default_locale = NULL;
98994639 3368
7d4bcc4a 3369# endif
948523db
KW		 3370
3371# ifndef DEBUGGING
3372# define DEBUG_LOCALE_INIT(a,b,c)
3373# else
7d4bcc4a 3374
8298454c 3375 DEBUG_INITIALIZATION_set(cBOOL(PerlEnv_getenv("PERL_DEBUG_LOCALE_INIT")));
7d4bcc4a
KW		 3376
3377# define DEBUG_LOCALE_INIT(category, locale, result) \
2fcc0ca9
KW		 3378 STMT_START { \
3379 if (debug_initialization) { \
3380 PerlIO_printf(Perl_debug_log, \
3381 "%s:%d: %s\n", \
3382 __FILE__, __LINE__, \
a4f00dcc 3383 setlocale_debug_string(category, \
2fcc0ca9
KW		 3384 locale, \
3385 result)); \
3386 } \
3387 } STMT_END
2fcc0ca9 3388
948523db
KW		 3389/* Make sure the parallel arrays are properly set up */
3390# ifdef USE_LOCALE_NUMERIC
3391 assert(categories[LC_NUMERIC_INDEX] == LC_NUMERIC);
3392 assert(strEQ(category_names[LC_NUMERIC_INDEX], "LC_NUMERIC"));
e9bc6d6b
KW		 3393# ifdef USE_POSIX_2008_LOCALE
3394 assert(category_masks[LC_NUMERIC_INDEX] == LC_NUMERIC_MASK);
3395# endif
948523db
KW		 3396# endif
3397# ifdef USE_LOCALE_CTYPE
3398 assert(categories[LC_CTYPE_INDEX] == LC_CTYPE);
3399 assert(strEQ(category_names[LC_CTYPE_INDEX], "LC_CTYPE"));
e9bc6d6b
KW		 3400# ifdef USE_POSIX_2008_LOCALE
3401 assert(category_masks[LC_CTYPE_INDEX] == LC_CTYPE_MASK);
3402# endif
948523db
KW		 3403# endif
3404# ifdef USE_LOCALE_COLLATE
3405 assert(categories[LC_COLLATE_INDEX] == LC_COLLATE);
3406 assert(strEQ(category_names[LC_COLLATE_INDEX], "LC_COLLATE"));
e9bc6d6b
KW		 3407# ifdef USE_POSIX_2008_LOCALE
3408 assert(category_masks[LC_COLLATE_INDEX] == LC_COLLATE_MASK);
3409# endif
948523db
KW		 3410# endif
3411# ifdef USE_LOCALE_TIME
3412 assert(categories[LC_TIME_INDEX] == LC_TIME);
3413 assert(strEQ(category_names[LC_TIME_INDEX], "LC_TIME"));
e9bc6d6b
KW		 3414# ifdef USE_POSIX_2008_LOCALE
3415 assert(category_masks[LC_TIME_INDEX] == LC_TIME_MASK);
3416# endif
948523db
KW		 3417# endif
3418# ifdef USE_LOCALE_MESSAGES
3419 assert(categories[LC_MESSAGES_INDEX] == LC_MESSAGES);
3420 assert(strEQ(category_names[LC_MESSAGES_INDEX], "LC_MESSAGES"));
e9bc6d6b
KW		 3421# ifdef USE_POSIX_2008_LOCALE
3422 assert(category_masks[LC_MESSAGES_INDEX] == LC_MESSAGES_MASK);
3423# endif
948523db
KW		 3424# endif
3425# ifdef USE_LOCALE_MONETARY
3426 assert(categories[LC_MONETARY_INDEX] == LC_MONETARY);
3427 assert(strEQ(category_names[LC_MONETARY_INDEX], "LC_MONETARY"));
e9bc6d6b
KW		 3428# ifdef USE_POSIX_2008_LOCALE
3429 assert(category_masks[LC_MONETARY_INDEX] == LC_MONETARY_MASK);
3430# endif
948523db 3431# endif
9821811f
KW		 3432# ifdef USE_LOCALE_ADDRESS
3433 assert(categories[LC_ADDRESS_INDEX] == LC_ADDRESS);
3434 assert(strEQ(category_names[LC_ADDRESS_INDEX], "LC_ADDRESS"));
e9bc6d6b
KW		 3435# ifdef USE_POSIX_2008_LOCALE
3436 assert(category_masks[LC_ADDRESS_INDEX] == LC_ADDRESS_MASK);
3437# endif
9821811f
KW		 3438# endif
3439# ifdef USE_LOCALE_IDENTIFICATION
3440 assert(categories[LC_IDENTIFICATION_INDEX] == LC_IDENTIFICATION);
3441 assert(strEQ(category_names[LC_IDENTIFICATION_INDEX], "LC_IDENTIFICATION"));
e9bc6d6b
KW		 3442# ifdef USE_POSIX_2008_LOCALE
3443 assert(category_masks[LC_IDENTIFICATION_INDEX] == LC_IDENTIFICATION_MASK);
3444# endif
9821811f
KW		 3445# endif
3446# ifdef USE_LOCALE_MEASUREMENT
3447 assert(categories[LC_MEASUREMENT_INDEX] == LC_MEASUREMENT);
3448 assert(strEQ(category_names[LC_MEASUREMENT_INDEX], "LC_MEASUREMENT"));
e9bc6d6b
KW		 3449# ifdef USE_POSIX_2008_LOCALE
3450 assert(category_masks[LC_MEASUREMENT_INDEX] == LC_MEASUREMENT_MASK);
3451# endif
9821811f
KW		 3452# endif
3453# ifdef USE_LOCALE_PAPER
3454 assert(categories[LC_PAPER_INDEX] == LC_PAPER);
3455 assert(strEQ(category_names[LC_PAPER_INDEX], "LC_PAPER"));
e9bc6d6b
KW		 3456# ifdef USE_POSIX_2008_LOCALE
3457 assert(category_masks[LC_PAPER_INDEX] == LC_PAPER_MASK);
3458# endif
9821811f
KW		 3459# endif
3460# ifdef USE_LOCALE_TELEPHONE
3461 assert(categories[LC_TELEPHONE_INDEX] == LC_TELEPHONE);
3462 assert(strEQ(category_names[LC_TELEPHONE_INDEX], "LC_TELEPHONE"));
e9bc6d6b
KW		 3463# ifdef USE_POSIX_2008_LOCALE
3464 assert(category_masks[LC_TELEPHONE_INDEX] == LC_TELEPHONE_MASK);
3465# endif
9821811f 3466# endif
36dbc955
KW		 3467# ifdef USE_LOCALE_SYNTAX
3468 assert(categories[LC_SYNTAX_INDEX] == LC_SYNTAX);
3469 assert(strEQ(category_names[LC_SYNTAX_INDEX], "LC_SYNTAX"));
3470# ifdef USE_POSIX_2008_LOCALE
3471 assert(category_masks[LC_SYNTAX_INDEX] == LC_SYNTAX_MASK);
3472# endif
3473# endif
3474# ifdef USE_LOCALE_TOD
3475 assert(categories[LC_TOD_INDEX] == LC_TOD);
3476 assert(strEQ(category_names[LC_TOD_INDEX], "LC_TOD"));
3477# ifdef USE_POSIX_2008_LOCALE
3478 assert(category_masks[LC_TOD_INDEX] == LC_TOD_MASK);
3479# endif
3480# endif
948523db
KW		 3481# ifdef LC_ALL
3482 assert(categories[LC_ALL_INDEX] == LC_ALL);
3483 assert(strEQ(category_names[LC_ALL_INDEX], "LC_ALL"));
3484 assert(NOMINAL_LC_ALL_INDEX == LC_ALL_INDEX);
e9bc6d6b
KW		 3485# ifdef USE_POSIX_2008_LOCALE
3486 assert(category_masks[LC_ALL_INDEX] == LC_ALL_MASK);
3487# endif
948523db
KW		 3488# endif
3489# endif /* DEBUGGING */
47280b20 3490
5a6637f0
KW		 3491 /* Initialize the per-thread mbrFOO() state variables. See POSIX.xs for
3492 * why these particular incantations are used. */
d2c9cb53
KW		 3493#ifdef HAS_MBRLEN
3494 memzero(&PL_mbrlen_ps, sizeof(PL_mbrlen_ps));
3495#endif
5a6637f0
KW		 3496#ifdef HAS_MBRTOWC
3497 memzero(&PL_mbrtowc_ps, sizeof(PL_mbrtowc_ps));
3498#endif
3499#ifdef HAS_WCTOMBR
3500 wcrtomb(NULL, L'\0', &PL_wcrtomb_ps);
3501#endif
d2c9cb53 3502
47280b20
KW		 3503 /* Initialize the cache of the program's UTF-8ness for the always known
3504 * locales C and POSIX */
3505 my_strlcpy(PL_locale_utf8ness, C_and_POSIX_utf8ness,
3506 sizeof(PL_locale_utf8ness));
3507
e9bc6d6b
KW		 3508# ifdef USE_THREAD_SAFE_LOCALE
3509# ifdef WIN32
3510
3511 _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
3512
3513# endif
3514# endif
39e69e77 3515# ifdef USE_POSIX_2008_LOCALE
e9bc6d6b
KW		 3516
3517 PL_C_locale_obj = newlocale(LC_ALL_MASK, "C", (locale_t) 0);
3518 if (! PL_C_locale_obj) {
3519 Perl_croak_nocontext(
3520 "panic: Cannot create POSIX 2008 C locale object; errno=%d", errno);
3521 }
3522 if (DEBUG_Lv_TEST || debug_initialization) {
3523 PerlIO_printf(Perl_debug_log, "%s:%d: created C object %p\n", __FILE__, __LINE__, PL_C_locale_obj);
3524 }
3525
3526# endif
3527
78f7c09f
KW		 3528# ifdef USE_LOCALE_NUMERIC
3529
3ca88433
KW		 3530 PL_numeric_radix_sv = newSVpvs(".");
3531
78f7c09f
KW		 3532# endif
3533
e9bc6d6b
KW		 3534# if defined(USE_POSIX_2008_LOCALE) && ! defined(HAS_QUERYLOCALE)
3535
3536 /* Initialize our records. If we have POSIX 2008, we have LC_ALL */
3537 do_setlocale_c(LC_ALL, my_setlocale(LC_ALL, NULL));
3538
3539# endif
b56c4436 3540# ifdef LOCALE_ENVIRON_REQUIRED
98994639
HS		 3541
3542 /*
3543 * Ultrix setlocale(..., "") fails if there are no environment
3544 * variables from which to get a locale name.
3545 */
3546
b56c4436
KW		 3547# ifndef LC_ALL
3548# error Ultrix without LC_ALL not implemented
3549# else
7d4bcc4a 3550
b56c4436
KW		 3551 {
3552 bool done = FALSE;
ea92aad8
KW		 3553 if (lang) {
3554 sl_result[LC_ALL_INDEX] = do_setlocale_c(LC_ALL, setlocale_init);
3555 DEBUG_LOCALE_INIT(LC_ALL, setlocale_init, sl_result[LC_ALL_INDEX]);
3556 if (sl_result[LC_ALL_INDEX])
3557 done = TRUE;
3558 else
e5f10d49 3559 setlocale_failure = TRUE;
ea92aad8
KW		 3560 }
3561 if (! setlocale_failure) {
3562 const char * locale_param;
3563 for (i = 0; i < LC_ALL_INDEX; i++) {
3564 locale_param = (! done && (lang || PerlEnv_getenv(category_names[i])))
3565 ? setlocale_init
3566 : NULL;
3567 sl_result[i] = do_setlocale_r(categories[i], locale_param);
3568 if (! sl_result[i]) {
3569 setlocale_failure = TRUE;
3570 }
3571 DEBUG_LOCALE_INIT(categories[i], locale_param, sl_result[i]);
e5f10d49 3572 }
c835d6be 3573 }
7d4bcc4a
KW		 3574 }
3575
3576# endif /* LC_ALL */
e5f10d49 3577# endif /* LOCALE_ENVIRON_REQUIRED */
98994639 3578
65ebb059 3579 /* We try each locale in the list until we get one that works, or exhaust
20a240df
KW		 3580 * the list. Normally the loop is executed just once. But if setting the
3581 * locale fails, inside the loop we add fallback trials to the array and so
3582 * will execute the loop multiple times */
c3fcd832
KW		 3583 trial_locales[0] = setlocale_init;
3584 trial_locales_count = 1;
7d4bcc4a 3585
65ebb059
KW		 3586 for (i= 0; i < trial_locales_count; i++) {
3587 const char * trial_locale = trial_locales[i];
3588
3589 if (i > 0) {
3590
3591 /* XXX This is to preserve old behavior for LOCALE_ENVIRON_REQUIRED
3592 * when i==0, but I (khw) don't think that behavior makes much
3593 * sense */
3594 setlocale_failure = FALSE;
3595
7d4bcc4a 3596# ifdef SYSTEM_DEFAULT_LOCALE
291a84fb 3597# ifdef WIN32 /* Note that assumes Win32 has LC_ALL */
7d4bcc4a 3598
65ebb059
KW		 3599 /* On Windows machines, an entry of "" after the 0th means to use
3600 * the system default locale, which we now proceed to get. */
3601 if (strEQ(trial_locale, "")) {
3602 unsigned int j;
3603
3604 /* Note that this may change the locale, but we are going to do
3605 * that anyway just below */
837ce802 3606 system_default_locale = do_setlocale_c(LC_ALL, "");
5d1187d1 3607 DEBUG_LOCALE_INIT(LC_ALL, "", system_default_locale);
65ebb059 3608
7d4bcc4a 3609 /* Skip if invalid or if it's already on the list of locales to
65ebb059
KW		 3610 * try */
3611 if (! system_default_locale) {
3612 goto next_iteration;
3613 }
3614 for (j = 0; j < trial_locales_count; j++) {
3615 if (strEQ(system_default_locale, trial_locales[j])) {
3616 goto next_iteration;
3617 }
3618 }
3619
3620 trial_locale = system_default_locale;
3621 }
ec0202b5
KW		 3622# else
3623# error SYSTEM_DEFAULT_LOCALE only implemented for Win32
3624# endif
7d4bcc4a 3625# endif /* SYSTEM_DEFAULT_LOCALE */
291a84fb
KW		 3626
3627 } /* For i > 0 */
65ebb059 3628
7d4bcc4a
KW		 3629# ifdef LC_ALL
3630
948523db
KW		 3631 sl_result[LC_ALL_INDEX] = do_setlocale_c(LC_ALL, trial_locale);
3632 DEBUG_LOCALE_INIT(LC_ALL, trial_locale, sl_result[LC_ALL_INDEX]);
3633 if (! sl_result[LC_ALL_INDEX]) {
49c85077 3634 setlocale_failure = TRUE;
7cd8b568
KW		 3635 }
3636 else {
3637 /* Since LC_ALL succeeded, it should have changed all the other
3638 * categories it can to its value; so we massage things so that the
3639 * setlocales below just return their category's current values.
3640 * This adequately handles the case in NetBSD where LC_COLLATE may
3641 * not be defined for a locale, and setting it individually will
7d4bcc4a 3642 * fail, whereas setting LC_ALL succeeds, leaving LC_COLLATE set to
7cd8b568
KW		 3643 * the POSIX locale. */
3644 trial_locale = NULL;
3645 }
7d4bcc4a
KW		 3646
3647# endif /* LC_ALL */
98994639 3648
e5f10d49
KW		 3649 if (! setlocale_failure) {
3650 unsigned int j;
3651 for (j = 0; j < NOMINAL_LC_ALL_INDEX; j++) {
3652 curlocales[j]
3653 = savepv(do_setlocale_r(categories[j], trial_locale));
3654 if (! curlocales[j]) {
3655 setlocale_failure = TRUE;
3656 }
3657 DEBUG_LOCALE_INIT(categories[j], trial_locale, curlocales[j]);
3658 }
c835d6be 3659
e5f10d49
KW		 3660 if (! setlocale_failure) { /* All succeeded */
3661 break; /* Exit trial_locales loop */
49c85077 3662 }
65ebb059 3663 }
98994639 3664
49c85077
KW		 3665 /* Here, something failed; will need to try a fallback. */
3666 ok = 0;
65ebb059 3667
49c85077
KW		 3668 if (i == 0) {
3669 unsigned int j;
98994639 3670
65ebb059 3671 if (locwarn) { /* Output failure info only on the first one */
7d4bcc4a
KW		 3672
3673# ifdef LC_ALL
98994639 3674
49c85077
KW		 3675 PerlIO_printf(Perl_error_log,
3676 "perl: warning: Setting locale failed.\n");
98994639 3677
7d4bcc4a 3678# else /* !LC_ALL */
98994639 3679
49c85077
KW		 3680 PerlIO_printf(Perl_error_log,
3681 "perl: warning: Setting locale failed for the categories:\n\t");
7d4bcc4a 3682
e5f10d49
KW		 3683 for (j = 0; j < NOMINAL_LC_ALL_INDEX; j++) {
3684 if (! curlocales[j]) {
3685 PerlIO_printf(Perl_error_log, category_names[j]);
3686 }
3687 else {
3688 Safefree(curlocales[j]);
3689 }
3690 }
7d4bcc4a 3691
7d4bcc4a 3692# endif /* LC_ALL */
98994639 3693
49c85077
KW		 3694 PerlIO_printf(Perl_error_log,
3695 "perl: warning: Please check that your locale settings:\n");
98994639 3696
7d4bcc4a
KW		 3697# ifdef __GLIBC__
3698
49c85077
KW		 3699 PerlIO_printf(Perl_error_log,
3700 "\tLANGUAGE = %c%s%c,\n",
3701 language ? '"' : '(',
3702 language ? language : "unset",
3703 language ? '"' : ')');
7d4bcc4a 3704# endif
98994639 3705
49c85077
KW		 3706 PerlIO_printf(Perl_error_log,
3707 "\tLC_ALL = %c%s%c,\n",
3708 lc_all ? '"' : '(',
3709 lc_all ? lc_all : "unset",
3710 lc_all ? '"' : ')');
98994639 3711
7d4bcc4a
KW		 3712# if defined(USE_ENVIRON_ARRAY)
3713
49c85077 3714 {
cd999af9 3715 char **e;
d5e32b93
KW		 3716
3717 /* Look through the environment for any variables of the
3718 * form qr/ ^ LC_ [A-Z]+ = /x, except LC_ALL which was
3719 * already handled above. These are assumed to be locale
3720 * settings. Output them and their values. */
cd999af9 3721 for (e = environ; *e; e++) {
d5e32b93
KW		 3722 const STRLEN prefix_len = sizeof("LC_") - 1;
3723 STRLEN uppers_len;
3724
cd999af9 3725 if ( strBEGINs(*e, "LC_")
c8b388b0 3726 && ! strBEGINs(*e, "LC_ALL=")
d5e32b93
KW		 3727 && (uppers_len = strspn(*e + prefix_len,
3728 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"))
3729 && ((*e)[prefix_len + uppers_len] == '='))
cd999af9
KW		 3730 {
3731 PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
d5e32b93
KW		 3732 (int) (prefix_len + uppers_len), *e,
3733 *e + prefix_len + uppers_len + 1);
cd999af9
KW		 3734 }
3735 }
49c85077 3736 }
7d4bcc4a
KW		 3737
3738# else
3739
49c85077
KW		 3740 PerlIO_printf(Perl_error_log,
3741 "\t(possibly more locale environment variables)\n");
7d4bcc4a
KW		 3742
3743# endif
98994639 3744
49c85077
KW		 3745 PerlIO_printf(Perl_error_log,
3746 "\tLANG = %c%s%c\n",
3747 lang ? '"' : '(',
3748 lang ? lang : "unset",
3749 lang ? '"' : ')');
98994639 3750
49c85077
KW		 3751 PerlIO_printf(Perl_error_log,
3752 " are supported and installed on your system.\n");
3753 }
98994639 3754
65ebb059 3755 /* Calculate what fallback locales to try. We have avoided this
f6bab5f6 3756 * until we have to, because failure is quite unlikely. This will
65ebb059
KW		 3757 * usually change the upper bound of the loop we are in.
3758 *
3759 * Since the system's default way of setting the locale has not
3760 * found one that works, We use Perl's defined ordering: LC_ALL,
3761 * LANG, and the C locale. We don't try the same locale twice, so
3762 * don't add to the list if already there. (On POSIX systems, the
3763 * LC_ALL element will likely be a repeat of the 0th element "",
6b058d42
KW		 3764 * but there's no harm done by doing it explicitly.
3765 *
3766 * Note that this tries the LC_ALL environment variable even on
3767 * systems which have no LC_ALL locale setting. This may or may
3768 * not have been originally intentional, but there's no real need
3769 * to change the behavior. */
65ebb059
KW		 3770 if (lc_all) {
3771 for (j = 0; j < trial_locales_count; j++) {
3772 if (strEQ(lc_all, trial_locales[j])) {
3773 goto done_lc_all;
3774 }
3775 }
3776 trial_locales[trial_locales_count++] = lc_all;
3777 }
3778 done_lc_all:
98994639 3779
65ebb059
KW		 3780 if (lang) {
3781 for (j = 0; j < trial_locales_count; j++) {
3782 if (strEQ(lang, trial_locales[j])) {
3783 goto done_lang;
3784 }
3785 }
3786 trial_locales[trial_locales_count++] = lang;
3787 }
3788 done_lang:
3789
7d4bcc4a
KW		 3790# if defined(WIN32) && defined(LC_ALL)
3791
65ebb059
KW		 3792 /* For Windows, we also try the system default locale before "C".
3793 * (If there exists a Windows without LC_ALL we skip this because
3794 * it gets too complicated. For those, the "C" is the next
3795 * fallback possibility). The "" is the same as the 0th element of
3796 * the array, but the code at the loop above knows to treat it
3797 * differently when not the 0th */
3798 trial_locales[trial_locales_count++] = "";
7d4bcc4a
KW		 3799
3800# endif
65ebb059
KW		 3801
3802 for (j = 0; j < trial_locales_count; j++) {
3803 if (strEQ("C", trial_locales[j])) {
3804 goto done_C;
3805 }
3806 }
3807 trial_locales[trial_locales_count++] = "C";
98994639 3808
65ebb059
KW		 3809 done_C: ;
3810 } /* end of first time through the loop */
98994639 3811
7d4bcc4a
KW		 3812# ifdef WIN32
3813
65ebb059 3814 next_iteration: ;
7d4bcc4a
KW		 3815
3816# endif
65ebb059
KW		 3817
3818 } /* end of looping through the trial locales */
3819
3820 if (ok < 1) { /* If we tried to fallback */
3821 const char* msg;
3822 if (! setlocale_failure) { /* fallback succeeded */
3823 msg = "Falling back to";
3824 }
3825 else { /* fallback failed */
e5f10d49 3826 unsigned int j;
98994639 3827
65ebb059
KW		 3828 /* We dropped off the end of the loop, so have to decrement i to
3829 * get back to the value the last time through */
3830 i--;
98994639 3831
65ebb059
KW		 3832 ok = -1;
3833 msg = "Failed to fall back to";
3834
3835 /* To continue, we should use whatever values we've got */
7d4bcc4a 3836
e5f10d49
KW		 3837 for (j = 0; j < NOMINAL_LC_ALL_INDEX; j++) {
3838 Safefree(curlocales[j]);
3839 curlocales[j] = savepv(do_setlocale_r(categories[j], NULL));
3840 DEBUG_LOCALE_INIT(categories[j], NULL, curlocales[j]);
3841 }
65ebb059
KW		 3842 }
3843
3844 if (locwarn) {
3845 const char * description;
3846 const char * name = "";
3847 if (strEQ(trial_locales[i], "C")) {
3848 description = "the standard locale";
3849 name = "C";
3850 }
7d4bcc4a
KW		 3851
3852# ifdef SYSTEM_DEFAULT_LOCALE
3853
65ebb059
KW		 3854 else if (strEQ(trial_locales[i], "")) {
3855 description = "the system default locale";
3856 if (system_default_locale) {
3857 name = system_default_locale;
3858 }
3859 }