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Refactor locale mutex setup
[perl5.git] / locale.c
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1/* locale.c
2 *
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3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 * 2002, 2003, 2005, 2006, 2007, 2008 by Larry Wall and others
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5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
4ac71550 12 * A Elbereth Gilthoniel,
cdad3b53 13 * silivren penna míriel
4ac71550 14 * o menel aglar elenath!
cdad3b53 15 * Na-chaered palan-díriel
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16 * o galadhremmin ennorath,
17 * Fanuilos, le linnathon
18 * nef aear, si nef aearon!
19 *
20 * [p.238 of _The Lord of the Rings_, II/i: "Many Meetings"]
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21 */
22
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23/* utility functions for handling locale-specific stuff like what
24 * character represents the decimal point.
0d071d52 25 *
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26 * All C programs have an underlying locale. Perl code generally doesn't pay
27 * any attention to it except within the scope of a 'use locale'. For most
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28 * categories, it accomplishes this by just using different operations if it is
29 * in such scope than if not. However, various libc functions called by Perl
30 * are affected by the LC_NUMERIC category, so there are macros in perl.h that
31 * are used to toggle between the current locale and the C locale depending on
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32 * the desired behavior of those functions at the moment. And, LC_MESSAGES is
33 * switched to the C locale for outputting the message unless within the scope
34 * of 'use locale'.
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35 *
36 * This code now has multi-thread-safe locale handling on systems that support
37 * that. This is completely transparent to most XS code. On earlier systems,
38 * it would be possible to emulate thread-safe locales, but this likely would
39 * involve a lot of locale switching, and would require XS code changes.
40 * Macros could be written so that the code wouldn't have to know which type of
41 * system is being used. It's unlikely that we would ever do that, since most
42 * modern systems support thread-safe locales, but there was code written to
43 * this end, and is retained, #ifdef'd out.
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44 */
45
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46#include "EXTERN.h"
47#define PERL_IN_LOCALE_C
f7416781 48#include "perl_langinfo.h"
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49#include "perl.h"
50
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51#include "reentr.h"
52
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53#ifdef I_WCHAR
54# include <wchar.h>
55#endif
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56#ifdef I_WCTYPE
57# include <wctype.h>
58#endif
0dec74cd 59
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60/* If the environment says to, we can output debugging information during
61 * initialization. This is done before option parsing, and before any thread
62 * creation, so can be a file-level static */
8c3a0f6c 63#if ! defined(DEBUGGING)
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64# define debug_initialization 0
65# define DEBUG_INITIALIZATION_set(v)
66#else
2fcc0ca9 67static bool debug_initialization = FALSE;
5a4b0634 68# define DEBUG_INITIALIZATION_set(v) (debug_initialization = v)
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69#endif
70
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71
72/* Returns the Unix errno portion; ignoring any others. This is a macro here
73 * instead of putting it into perl.h, because unclear to khw what should be
74 * done generally. */
75#define GET_ERRNO saved_errno
76
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77/* strlen() of a literal string constant. We might want this more general,
78 * but using it in just this file for now. A problem with more generality is
79 * the compiler warnings about comparing unlike signs */
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80#define STRLENs(s) (sizeof("" s "") - 1)
81
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82/* Is the C string input 'name' "C" or "POSIX"? If so, and 'name' is the
83 * return of setlocale(), then this is extremely likely to be the C or POSIX
84 * locale. However, the output of setlocale() is documented to be opaque, but
85 * the odds are extremely small that it would return these two strings for some
86 * other locale. Note that VMS in these two locales includes many non-ASCII
87 * characters as controls and punctuation (below are hex bytes):
88 * cntrl: 84-97 9B-9F
89 * punct: A1-A3 A5 A7-AB B0-B3 B5-B7 B9-BD BF-CF D1-DD DF-EF F1-FD
90 * Oddly, none there are listed as alphas, though some represent alphabetics
91 * http://www.nntp.perl.org/group/perl.perl5.porters/2013/02/msg198753.html */
92#define isNAME_C_OR_POSIX(name) \
93 ( (name) != NULL \
94 && (( *(name) == 'C' && (*(name + 1)) == '\0') \
95 || strEQ((name), "POSIX")))
96
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97#ifdef USE_LOCALE
98
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99/* This code keeps a LRU cache of the UTF-8ness of the locales it has so-far
100 * looked up. This is in the form of a C string: */
101
102#define UTF8NESS_SEP "\v"
103#define UTF8NESS_PREFIX "\f"
104
105/* So, the string looks like:
98994639 106 *
47280b20 107 * \vC\a0\vPOSIX\a0\vam_ET\a0\vaf_ZA.utf8\a1\ven_US.UTF-8\a1\0
98994639 108 *
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109 * where the digit 0 after the \a indicates that the locale starting just
110 * after the preceding \v is not UTF-8, and the digit 1 mean it is. */
111
112STATIC_ASSERT_DECL(STRLENs(UTF8NESS_SEP) == 1);
113STATIC_ASSERT_DECL(STRLENs(UTF8NESS_PREFIX) == 1);
114
115#define C_and_POSIX_utf8ness UTF8NESS_SEP "C" UTF8NESS_PREFIX "0" \
116 UTF8NESS_SEP "POSIX" UTF8NESS_PREFIX "0"
117
118/* The cache is initialized to C_and_POSIX_utf8ness at start up. These are
119 * kept there always. The remining portion of the cache is LRU, with the
120 * oldest looked-up locale at the tail end */
121
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122STATIC char *
123S_stdize_locale(pTHX_ char *locs)
124{
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125 /* Standardize the locale name from a string returned by 'setlocale',
126 * possibly modifying that string.
127 *
128 * The typical return value of setlocale() is either
129 * (1) "xx_YY" if the first argument of setlocale() is not LC_ALL
130 * (2) "xa_YY xb_YY ..." if the first argument of setlocale() is LC_ALL
131 * (the space-separated values represent the various sublocales,
132 * in some unspecified order). This is not handled by this function.
133 *
134 * In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n",
135 * which is harmful for further use of the string in setlocale(). This
136 * function removes the trailing new line and everything up through the '='
137 * */
138
7452cf6a 139 const char * const s = strchr(locs, '=');
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140 bool okay = TRUE;
141
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142 PERL_ARGS_ASSERT_STDIZE_LOCALE;
143
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144 if (s) {
145 const char * const t = strchr(s, '.');
98994639 146 okay = FALSE;
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147 if (t) {
148 const char * const u = strchr(t, '\n');
149 if (u && (u[1] == 0)) {
150 const STRLEN len = u - s;
151 Move(s + 1, locs, len, char);
152 locs[len] = 0;
153 okay = TRUE;
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154 }
155 }
156 }
157
158 if (!okay)
159 Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs);
160
161 return locs;
162}
163
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164/* Two parallel arrays; first the locale categories Perl uses on this system;
165 * the second array is their names. These arrays are in mostly arbitrary
166 * order. */
167
168const int categories[] = {
169
170# ifdef USE_LOCALE_NUMERIC
171 LC_NUMERIC,
172# endif
173# ifdef USE_LOCALE_CTYPE
174 LC_CTYPE,
175# endif
176# ifdef USE_LOCALE_COLLATE
177 LC_COLLATE,
178# endif
179# ifdef USE_LOCALE_TIME
180 LC_TIME,
181# endif
182# ifdef USE_LOCALE_MESSAGES
183 LC_MESSAGES,
184# endif
185# ifdef USE_LOCALE_MONETARY
186 LC_MONETARY,
187# endif
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188# ifdef USE_LOCALE_ADDRESS
189 LC_ADDRESS,
190# endif
191# ifdef USE_LOCALE_IDENTIFICATION
192 LC_IDENTIFICATION,
193# endif
194# ifdef USE_LOCALE_MEASUREMENT
195 LC_MEASUREMENT,
196# endif
197# ifdef USE_LOCALE_PAPER
198 LC_PAPER,
199# endif
200# ifdef USE_LOCALE_TELEPHONE
201 LC_TELEPHONE,
202# endif
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203# ifdef USE_LOCALE_SYNTAX
204 LC_SYNTAX,
205# endif
206# ifdef USE_LOCALE_TOD
207 LC_TOD,
208# endif
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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[] = {
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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
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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
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254# ifdef USE_LOCALE_SYNTAX
255 "LC_SYNTAX",
256# endif
257# ifdef USE_LOCALE_TOD
258 "LC_TOD",
259# endif
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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
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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
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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
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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
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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
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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
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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
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413# endif
414#endif /* ifdef USE_LOCALE */
8ef6e574 415
d2b24094 416/* Windows requres a customized base-level setlocale() */
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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)
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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
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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
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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
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495# ifdef USE_LOCALE_SYNTAX
496 LC_SYNTAX_MASK,
497# endif
498# ifdef USE_LOCALE_TOD
499 LC_TOD_MASK,
500# endif
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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) \
8fdf38a3 2623 || ! defined(HAS_POSIX_2008_LOCALE)
f7416781 2624
ab340fff 2625 /* Here, use plain nl_langinfo(), switching to the underlying LC_NUMERIC
ae74815b
KW
2626 * for those items dependent on it. This must be copied to a buffer before
2627 * switching back, as some systems destroy the buffer when setlocale() is
2628 * called */
f7416781 2629
038d3702
KW
2630 {
2631 DECLARATION_FOR_LC_NUMERIC_MANIPULATION;
2632
b2fee59c 2633 if (toggle) {
038d3702 2634 STORE_LC_NUMERIC_FORCE_TO_UNDERLYING();
b2fee59c 2635 }
f7416781 2636
5acc4454
KW
2637 LOCALE_LOCK; /* Prevent interference from another thread executing
2638 this code section (the only call to nl_langinfo in
2639 the core) */
2640
ee90eb2d 2641
628ff75a
KW
2642 /* Copy to a per-thread buffer, which is also one that won't be
2643 * destroyed by a subsequent setlocale(), such as the
2644 * RESTORE_LC_NUMERIC may do just below. */
0b6697c5
KW
2645 retval = save_to_buffer(nl_langinfo(item),
2646 &PL_langinfo_buf, &PL_langinfo_bufsize, 0);
f7416781 2647
5acc4454
KW
2648 LOCALE_UNLOCK;
2649
b2fee59c 2650 if (toggle) {
038d3702 2651 RESTORE_LC_NUMERIC();
b2fee59c 2652 }
f7416781
KW
2653 }
2654
ab340fff
KW
2655# else /* Use nl_langinfo_l(), avoiding both a mutex and changing the locale */
2656
5a854ab3 2657 {
b2fee59c
KW
2658 bool do_free = FALSE;
2659 locale_t cur = uselocale((locale_t) 0);
ab340fff 2660
b2fee59c
KW
2661 if (cur == LC_GLOBAL_LOCALE) {
2662 cur = duplocale(LC_GLOBAL_LOCALE);
2663 do_free = TRUE;
2664 }
ab340fff 2665
d36adde0
KW
2666# ifdef USE_LOCALE_NUMERIC
2667
b2fee59c 2668 if (toggle) {
e1aa2579
KW
2669 if (PL_underlying_numeric_obj) {
2670 cur = PL_underlying_numeric_obj;
2671 }
2672 else {
2673 cur = newlocale(LC_NUMERIC_MASK, PL_numeric_name, cur);
2674 do_free = TRUE;
2675 }
b2fee59c 2676 }
ab340fff 2677
d36adde0
KW
2678# endif
2679
628ff75a
KW
2680 /* We have to save it to a buffer, because the freelocale() just below
2681 * can invalidate the internal one */
0b6697c5
KW
2682 retval = save_to_buffer(nl_langinfo_l(item, cur),
2683 &PL_langinfo_buf, &PL_langinfo_bufsize, 0);
ee90eb2d 2684
b2fee59c
KW
2685 if (do_free) {
2686 freelocale(cur);
2687 }
5a854ab3 2688 }
ab340fff 2689
c1566110
KW
2690# endif
2691
0b6697c5 2692 if (strEQ(retval, "")) {
4e6826bf 2693 if (item == YESSTR) {
c1566110
KW
2694 return "yes";
2695 }
4e6826bf 2696 if (item == NOSTR) {
c1566110
KW
2697 return "no";
2698 }
2699 }
2700
0b6697c5 2701 return retval;
ab340fff 2702
f7416781 2703#else /* Below, emulate nl_langinfo as best we can */
43dd6b15
KW
2704
2705 {
2706
f7416781
KW
2707# ifdef HAS_LOCALECONV
2708
43dd6b15 2709 const struct lconv* lc;
628ff75a 2710 const char * temp;
038d3702 2711 DECLARATION_FOR_LC_NUMERIC_MANIPULATION;
f7416781 2712
69c5e0db
KW
2713# ifdef TS_W32_BROKEN_LOCALECONV
2714
2715 const char * save_global;
2716 const char * save_thread;
2717 int needed_size;
2718 char * ptr;
2719 char * e;
2720 char * item_start;
2721
2722# endif
f7416781
KW
2723# endif
2724# ifdef HAS_STRFTIME
2725
43dd6b15
KW
2726 struct tm tm;
2727 bool return_format = FALSE; /* Return the %format, not the value */
2728 const char * format;
f7416781
KW
2729
2730# endif
2731
43dd6b15
KW
2732 /* We copy the results to a per-thread buffer, even if not
2733 * multi-threaded. This is in part to simplify this code, and partly
2734 * because we need a buffer anyway for strftime(), and partly because a
2735 * call of localeconv() could otherwise wipe out the buffer, and the
2736 * programmer would not be expecting this, as this is a nl_langinfo()
2737 * substitute after all, so s/he might be thinking their localeconv()
2738 * is safe until another localeconv() call. */
f7416781 2739
43dd6b15
KW
2740 switch (item) {
2741 Size_t len;
f7416781 2742
8d72e74e 2743 /* This is unimplemented */
4e6826bf 2744 case ERA: /* For use with strftime() %E modifier */
f7416781 2745
43dd6b15
KW
2746 default:
2747 return "";
f7416781 2748
43dd6b15 2749 /* We use only an English set, since we don't know any more */
4e6826bf
KW
2750 case YESEXPR: return "^[+1yY]";
2751 case YESSTR: return "yes";
2752 case NOEXPR: return "^[-0nN]";
2753 case NOSTR: return "no";
2754
8d72e74e
KW
2755 case CODESET:
2756
2757# ifndef WIN32
2758
2759 /* On non-windows, this is unimplemented, in part because of
2760 * inconsistencies between vendors. The Darwin native
2761 * nl_langinfo() implementation simply looks at everything past
2762 * any dot in the name, but that doesn't work for other
2763 * vendors. Many Linux locales that don't have UTF-8 in their
2764 * names really are UTF-8, for example; z/OS locales that do
2765 * have UTF-8 in their names, aren't really UTF-8 */
2766 return "";
2767
2768# else
2769
2770 { /* But on Windows, the name does seem to be consistent, so
2771 use that. */
2772 const char * p;
2773 const char * first;
2774 Size_t offset = 0;
2775 const char * name = my_setlocale(LC_CTYPE, NULL);
2776
2777 if (isNAME_C_OR_POSIX(name)) {
2778 return "ANSI_X3.4-1968";
2779 }
2780
2781 /* Find the dot in the locale name */
2782 first = (const char *) strchr(name, '.');
2783 if (! first) {
2784 first = name;
2785 goto has_nondigit;
2786 }
2787
2788 /* Look at everything past the dot */
2789 first++;
2790 p = first;
2791
2792 while (*p) {
2793 if (! isDIGIT(*p)) {
2794 goto has_nondigit;
2795 }
2796
2797 p++;
2798 }
2799
2800 /* Here everything past the dot is a digit. Treat it as a
2801 * code page */
18503cbd 2802 retval = save_to_buffer("CP", &PL_langinfo_buf,
32a62865 2803 &PL_langinfo_bufsize, 0);
8d72e74e 2804 offset = STRLENs("CP");
f7416781 2805
8d72e74e
KW
2806 has_nondigit:
2807
2808 retval = save_to_buffer(first, &PL_langinfo_buf,
2809 &PL_langinfo_bufsize, offset);
2810 }
2811
2812 break;
2813
2814# endif
f7416781
KW
2815# ifdef HAS_LOCALECONV
2816
4e6826bf 2817 case CRNCYSTR:
f7416781 2818
43dd6b15
KW
2819 /* We don't bother with localeconv_l() because any system that
2820 * has it is likely to also have nl_langinfo() */
291a84fb 2821
8609fe00
KW
2822 LOCALECONV_LOCK; /* Prevent interference with other threads
2823 using localeconv() */
69c5e0db
KW
2824
2825# ifdef TS_W32_BROKEN_LOCALECONV
2826
2827 /* This is a workaround for a Windows bug prior to VS 15.
2828 * What we do here is, while locked, switch to the global
2829 * locale so localeconv() works; then switch back just before
2830 * the unlock. This can screw things up if some thread is
2831 * already using the global locale while assuming no other is.
2832 * A different workaround would be to call GetCurrencyFormat on
2833 * a known value, and parse it; patches welcome
2834 *
2835 * We have to use LC_ALL instead of LC_MONETARY because of
2836 * another bug in Windows */
2837
2838 save_thread = savepv(my_setlocale(LC_ALL, NULL));
2839 _configthreadlocale(_DISABLE_PER_THREAD_LOCALE);
2840 save_global= savepv(my_setlocale(LC_ALL, NULL));
2841 my_setlocale(LC_ALL, save_thread);
2842
2843# endif
5acc4454 2844
43dd6b15
KW
2845 lc = localeconv();
2846 if ( ! lc
2847 || ! lc->currency_symbol
2848 || strEQ("", lc->currency_symbol))
2849 {
8609fe00 2850 LOCALECONV_UNLOCK;
43dd6b15
KW
2851 return "";
2852 }
f7416781 2853
43dd6b15 2854 /* Leave the first spot empty to be filled in below */
0b6697c5
KW
2855 retval = save_to_buffer(lc->currency_symbol, &PL_langinfo_buf,
2856 &PL_langinfo_bufsize, 1);
43dd6b15
KW
2857 if (lc->mon_decimal_point && strEQ(lc->mon_decimal_point, ""))
2858 { /* khw couldn't figure out how the localedef specifications
2859 would show that the $ should replace the radix; this is
2860 just a guess as to how it might work.*/
a34edee3 2861 PL_langinfo_buf[0] = '.';
43dd6b15
KW
2862 }
2863 else if (lc->p_cs_precedes) {
a34edee3 2864 PL_langinfo_buf[0] = '-';
43dd6b15
KW
2865 }
2866 else {
a34edee3 2867 PL_langinfo_buf[0] = '+';
43dd6b15 2868 }
f7416781 2869
69c5e0db
KW
2870# ifdef TS_W32_BROKEN_LOCALECONV
2871
2872 my_setlocale(LC_ALL, save_global);
2873 _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
2874 my_setlocale(LC_ALL, save_thread);
2875 Safefree(save_global);
2876 Safefree(save_thread);
2877
2878# endif
2879
8609fe00 2880 LOCALECONV_UNLOCK;
43dd6b15 2881 break;
f7416781 2882
69c5e0db
KW
2883# ifdef TS_W32_BROKEN_LOCALECONV
2884
4e6826bf 2885 case RADIXCHAR:
69c5e0db
KW
2886
2887 /* For this, we output a known simple floating point number to
2888 * a buffer, and parse it, looking for the radix */
2889
2890 if (toggle) {
2891 STORE_LC_NUMERIC_FORCE_TO_UNDERLYING();
2892 }
2893
2894 if (PL_langinfo_bufsize < 10) {
2895 PL_langinfo_bufsize = 10;
2896 Renew(PL_langinfo_buf, PL_langinfo_bufsize, char);
2897 }
2898
2899 needed_size = my_snprintf(PL_langinfo_buf, PL_langinfo_bufsize,
2900 "%.1f", 1.5);
2901 if (needed_size >= (int) PL_langinfo_bufsize) {
2902 PL_langinfo_bufsize = needed_size + 1;
2903 Renew(PL_langinfo_buf, PL_langinfo_bufsize, char);
2904 needed_size = my_snprintf(PL_langinfo_buf, PL_langinfo_bufsize,
2905 "%.1f", 1.5);
2906 assert(needed_size < (int) PL_langinfo_bufsize);
2907 }
2908
2909 ptr = PL_langinfo_buf;
2910 e = PL_langinfo_buf + PL_langinfo_bufsize;
2911
2912 /* Find the '1' */
2913 while (ptr < e && *ptr != '1') {
2914 ptr++;
2915 }
2916 ptr++;
2917
2918 /* Find the '5' */
2919 item_start = ptr;
2920 while (ptr < e && *ptr != '5') {
2921 ptr++;
2922 }
2923
2924 /* Everything in between is the radix string */
2925 if (ptr >= e) {
2926 PL_langinfo_buf[0] = '?';
2927 PL_langinfo_buf[1] = '\0';
2928 }
2929 else {
2930 *ptr = '\0';
2931 Move(item_start, PL_langinfo_buf, ptr - PL_langinfo_buf, char);
2932 }
2933
2934 if (toggle) {
2935 RESTORE_LC_NUMERIC();
2936 }
2937
2938 retval = PL_langinfo_buf;
2939 break;
2940
2941# else
2942
2943 case RADIXCHAR: /* No special handling needed */
2944
2945# endif
2946
4e6826bf 2947 case THOUSEP:
f7416781 2948
43dd6b15 2949 if (toggle) {
038d3702 2950 STORE_LC_NUMERIC_FORCE_TO_UNDERLYING();
c0d737a8 2951 }
f7416781 2952
8609fe00
KW
2953 LOCALECONV_LOCK; /* Prevent interference with other threads
2954 using localeconv() */
69c5e0db
KW
2955
2956# ifdef TS_W32_BROKEN_LOCALECONV
2957
2958 /* This should only be for the thousands separator. A
2959 * different work around would be to use GetNumberFormat on a
2960 * known value and parse the result to find the separator */
2961 save_thread = savepv(my_setlocale(LC_ALL, NULL));
2962 _configthreadlocale(_DISABLE_PER_THREAD_LOCALE);
2963 save_global = savepv(my_setlocale(LC_ALL, NULL));
2964 my_setlocale(LC_ALL, save_thread);
2965# if 0
2966 /* This is the start of code that for broken Windows replaces
2967 * the above and below code, and instead calls
2968 * GetNumberFormat() and then would parse that to find the
2969 * thousands separator. It needs to handle UTF-16 vs -8
2970 * issues. */
2971
2972 needed_size = GetNumberFormatEx(PL_numeric_name, 0, "1234.5", NULL, PL_langinfo_buf, PL_langinfo_bufsize);
2973 DEBUG_L(PerlIO_printf(Perl_debug_log,
2974 "%s: %d: return from GetNumber, count=%d, val=%s\n",
2975 __FILE__, __LINE__, needed_size, PL_langinfo_buf));
2976
2977# endif
2978# endif
5acc4454 2979
43dd6b15
KW
2980 lc = localeconv();
2981 if (! lc) {
628ff75a 2982 temp = "";
33394adc 2983 }
43dd6b15 2984 else {
4e6826bf 2985 temp = (item == RADIXCHAR)
43dd6b15
KW
2986 ? lc->decimal_point
2987 : lc->thousands_sep;
628ff75a
KW
2988 if (! temp) {
2989 temp = "";
43dd6b15
KW
2990 }
2991 }
f7416781 2992
0b6697c5
KW
2993 retval = save_to_buffer(temp, &PL_langinfo_buf,
2994 &PL_langinfo_bufsize, 0);
f7416781 2995
69c5e0db
KW
2996# ifdef TS_W32_BROKEN_LOCALECONV
2997
2998 my_setlocale(LC_ALL, save_global);
2999 _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
3000 my_setlocale(LC_ALL, save_thread);
3001 Safefree(save_global);
3002 Safefree(save_thread);
3003
3004# endif
3005
8609fe00 3006 LOCALECONV_UNLOCK;
5acc4454 3007
43dd6b15 3008 if (toggle) {
038d3702 3009 RESTORE_LC_NUMERIC();
43dd6b15 3010 }
f7416781 3011
43dd6b15 3012 break;
f7416781
KW
3013
3014# endif
3015# ifdef HAS_STRFTIME
3016
43dd6b15
KW
3017 /* These are defined by C89, so we assume that strftime supports
3018 * them, and so are returned unconditionally; they may not be what
3019 * the locale actually says, but should give good enough results
3020 * for someone using them as formats (as opposed to trying to parse
3021 * them to figure out what the locale says). The other format
3022 * items are actually tested to verify they work on the platform */
4e6826bf
KW
3023 case D_FMT: return "%x";
3024 case T_FMT: return "%X";
3025 case D_T_FMT: return "%c";
43dd6b15
KW
3026
3027 /* These formats are only available in later strfmtime's */
4e6826bf 3028 case ERA_D_FMT: case ERA_T_FMT: case ERA_D_T_FMT: case T_FMT_AMPM:
43dd6b15
KW
3029
3030 /* The rest can be gotten from most versions of strftime(). */
4e6826bf
KW
3031 case ABDAY_1: case ABDAY_2: case ABDAY_3:
3032 case ABDAY_4: case ABDAY_5: case ABDAY_6: case ABDAY_7:
3033 case ALT_DIGITS:
3034 case AM_STR: case PM_STR:
3035 case ABMON_1: case ABMON_2: case ABMON_3: case ABMON_4:
3036 case ABMON_5: case ABMON_6: case ABMON_7: case ABMON_8:
3037 case ABMON_9: case ABMON_10: case ABMON_11: case ABMON_12:
3038 case DAY_1: case DAY_2: case DAY_3: case DAY_4:
3039 case DAY_5: case DAY_6: case DAY_7:
3040 case MON_1: case MON_2: case MON_3: case MON_4:
3041 case MON_5: case MON_6: case MON_7: case MON_8:
3042 case MON_9: case MON_10: case MON_11: case MON_12:
43dd6b15
KW
3043
3044 LOCALE_LOCK;
3045
3046 init_tm(&tm); /* Precaution against core dumps */
3047 tm.tm_sec = 30;
3048 tm.tm_min = 30;
3049 tm.tm_hour = 6;
3050 tm.tm_year = 2017 - 1900;
3051 tm.tm_wday = 0;
3052 tm.tm_mon = 0;
3053 switch (item) {
3054 default:
3055 LOCALE_UNLOCK;
3056 Perl_croak(aTHX_
3057 "panic: %s: %d: switch case: %d problem",
3058 __FILE__, __LINE__, item);
3059 NOT_REACHED; /* NOTREACHED */
3060
4e6826bf
KW
3061 case PM_STR: tm.tm_hour = 18;
3062 case AM_STR:
43dd6b15
KW
3063 format = "%p";
3064 break;
3065
4e6826bf
KW
3066 case ABDAY_7: tm.tm_wday++;
3067 case ABDAY_6: tm.tm_wday++;
3068 case ABDAY_5: tm.tm_wday++;
3069 case ABDAY_4: tm.tm_wday++;
3070 case ABDAY_3: tm.tm_wday++;
3071 case ABDAY_2: tm.tm_wday++;
3072 case ABDAY_1:
43dd6b15
KW
3073 format = "%a";
3074 break;
3075
4e6826bf
KW
3076 case DAY_7: tm.tm_wday++;
3077 case DAY_6: tm.tm_wday++;
3078 case DAY_5: tm.tm_wday++;
3079 case DAY_4: tm.tm_wday++;
3080 case DAY_3: tm.tm_wday++;
3081 case DAY_2: tm.tm_wday++;
3082 case DAY_1:
43dd6b15
KW
3083 format = "%A";
3084 break;
3085
4e6826bf
KW
3086 case ABMON_12: tm.tm_mon++;
3087 case ABMON_11: tm.tm_mon++;
3088 case ABMON_10: tm.tm_mon++;
3089 case ABMON_9: tm.tm_mon++;
3090 case ABMON_8: tm.tm_mon++;
3091 case ABMON_7: tm.tm_mon++;
3092 case ABMON_6: tm.tm_mon++;
3093 case ABMON_5: tm.tm_mon++;
3094 case ABMON_4: tm.tm_mon++;
3095 case ABMON_3: tm.tm_mon++;
3096 case ABMON_2: tm.tm_mon++;
3097 case ABMON_1:
43dd6b15
KW
3098 format = "%b";
3099 break;
3100
4e6826bf
KW
3101 case MON_12: tm.tm_mon++;
3102 case MON_11: tm.tm_mon++;
3103 case MON_10: tm.tm_mon++;
3104 case MON_9: tm.tm_mon++;
3105 case MON_8: tm.tm_mon++;
3106 case MON_7: tm.tm_mon++;
3107 case MON_6: tm.tm_mon++;
3108 case MON_5: tm.tm_mon++;
3109 case MON_4: tm.tm_mon++;
3110 case MON_3: tm.tm_mon++;
3111 case MON_2: tm.tm_mon++;
3112 case MON_1:
43dd6b15
KW
3113 format = "%B";
3114 break;
3115
4e6826bf 3116 case T_FMT_AMPM:
43dd6b15
KW
3117 format = "%r";
3118 return_format = TRUE;
3119 break;
3120
4e6826bf 3121 case ERA_D_FMT:
43dd6b15
KW
3122 format = "%Ex";
3123 return_format = TRUE;
3124 break;
3125
4e6826bf 3126 case ERA_T_FMT:
43dd6b15
KW
3127 format = "%EX";
3128 return_format = TRUE;
3129 break;
3130
4e6826bf 3131 case ERA_D_T_FMT:
43dd6b15
KW
3132 format = "%Ec";
3133 return_format = TRUE;
3134 break;
3135
4e6826bf 3136 case ALT_DIGITS:
43dd6b15
KW
3137 tm.tm_wday = 0;
3138 format = "%Ow"; /* Find the alternate digit for 0 */
3139 break;
3140 }
f7416781 3141
43dd6b15
KW
3142 /* We can't use my_strftime() because it doesn't look at
3143 * tm_wday */
3144 while (0 == strftime(PL_langinfo_buf, PL_langinfo_bufsize,
3145 format, &tm))
3146 {
3147 /* A zero return means one of:
3148 * a) there wasn't enough space in PL_langinfo_buf
3149 * b) the format, like a plain %p, returns empty
3150 * c) it was an illegal format, though some
3151 * implementations of strftime will just return the
3152 * illegal format as a plain character sequence.
3153 *
3154 * To quickly test for case 'b)', try again but precede
3155 * the format with a plain character. If that result is
3156 * still empty, the problem is either 'a)' or 'c)' */
3157
3158 Size_t format_size = strlen(format) + 1;
3159 Size_t mod_size = format_size + 1;
3160 char * mod_format;
3161 char * temp_result;
3162
3163 Newx(mod_format, mod_size, char);
3164 Newx(temp_result, PL_langinfo_bufsize, char);
6873aa47 3165 *mod_format = ' ';
43dd6b15
KW
3166 my_strlcpy(mod_format + 1, format, mod_size);
3167 len = strftime(temp_result,
3168 PL_langinfo_bufsize,
3169 mod_format, &tm);
3170 Safefree(mod_format);
3171 Safefree(temp_result);
3172
3173 /* If 'len' is non-zero, it means that we had a case like
3174 * %p which means the current locale doesn't use a.m. or
3175 * p.m., and that is valid */
3176 if (len == 0) {
3177
3178 /* Here, still didn't work. If we get well beyond a
3179 * reasonable size, bail out to prevent an infinite
3180 * loop. */
3181
3182 if (PL_langinfo_bufsize > 100 * format_size) {
3183 *PL_langinfo_buf = '\0';
3184 }
3185 else {
3186 /* Double the buffer size to retry; Add 1 in case
3187 * original was 0, so we aren't stuck at 0. */
3188 PL_langinfo_bufsize *= 2;
3189 PL_langinfo_bufsize++;
3190 Renew(PL_langinfo_buf, PL_langinfo_bufsize, char);
3191 continue;
3192 }
3193 }
f7416781 3194
f7416781 3195 break;
43dd6b15 3196 }
f7416781 3197
43dd6b15
KW
3198 /* Here, we got a result.
3199 *
3200 * If the item is 'ALT_DIGITS', PL_langinfo_buf contains the
3201 * alternate format for wday 0. If the value is the same as
3202 * the normal 0, there isn't an alternate, so clear the buffer.
3203 * */
4e6826bf 3204 if ( item == ALT_DIGITS
43dd6b15
KW
3205 && strEQ(PL_langinfo_buf, "0"))
3206 {
3207 *PL_langinfo_buf = '\0';
3208 }
f7416781 3209
43dd6b15
KW
3210 /* ALT_DIGITS is problematic. Experiments on it showed that
3211 * strftime() did not always work properly when going from
3212 * alt-9 to alt-10. Only a few locales have this item defined,
3213 * and in all of them on Linux that khw was able to find,
3214 * nl_langinfo() merely returned the alt-0 character, possibly
3215 * doubled. Most Unicode digits are in blocks of 10
3216 * consecutive code points, so that is sufficient information
3217 * for those scripts, as we can infer alt-1, alt-2, .... But
3218 * for a Japanese locale, a CJK ideographic 0 is returned, and
3219 * the CJK digits are not in code point order, so you can't
3220 * really infer anything. The localedef for this locale did
3221 * specify the succeeding digits, so that strftime() works
3222 * properly on them, without needing to infer anything. But
3223 * the nl_langinfo() return did not give sufficient information
3224 * for the caller to understand what's going on. So until
3225 * there is evidence that it should work differently, this
3226 * returns the alt-0 string for ALT_DIGITS.
3227 *
3228 * wday was chosen because its range is all a single digit.
3229 * Things like tm_sec have two digits as the minimum: '00' */
f7416781 3230
43dd6b15 3231 LOCALE_UNLOCK;
f7416781 3232
d1b150d9
KW
3233 retval = PL_langinfo_buf;
3234
43dd6b15
KW
3235 /* If to return the format, not the value, overwrite the buffer
3236 * with it. But some strftime()s will keep the original format
3237 * if illegal, so change those to "" */
3238 if (return_format) {
3239 if (strEQ(PL_langinfo_buf, format)) {
f7416781
KW
3240 *PL_langinfo_buf = '\0';
3241 }
43dd6b15 3242 else {
0b6697c5
KW
3243 retval = save_to_buffer(format, &PL_langinfo_buf,
3244 &PL_langinfo_bufsize, 0);
f7416781
KW
3245 }
3246 }
3247
3248 break;
f7416781
KW
3249
3250# endif
3251
43dd6b15 3252 }
f7416781
KW
3253 }
3254
0b6697c5 3255 return retval;
f7416781
KW
3256
3257#endif
3258
a4f00dcc 3259}
b385bb4d 3260
98994639
HS
3261/*
3262 * Initialize locale awareness.
3263 */
3264int
3265Perl_init_i18nl10n(pTHX_ int printwarn)
3266{
0e92a118
KW
3267 /* printwarn is
3268 *
3269 * 0 if not to output warning when setup locale is bad
3270 * 1 if to output warning based on value of PERL_BADLANG
3271 * >1 if to output regardless of PERL_BADLANG
3272 *
3273 * returns
98994639 3274 * 1 = set ok or not applicable,
0e92a118
KW
3275 * 0 = fallback to a locale of lower priority
3276 * -1 = fallback to all locales failed, not even to the C locale
6b058d42
KW
3277 *
3278 * Under -DDEBUGGING, if the environment variable PERL_DEBUG_LOCALE_INIT is
3279 * set, debugging information is output.
3280 *
3281 * This looks more complicated than it is, mainly due to the #ifdefs.
3282 *
3283 * We try to set LC_ALL to the value determined by the environment. If
3284 * there is no LC_ALL on this platform, we try the individual categories we
3285 * know about. If this works, we are done.
3286 *
3287 * But if it doesn't work, we have to do something else. We search the
3288 * environment variables ourselves instead of relying on the system to do
3289 * it. We look at, in order, LC_ALL, LANG, a system default locale (if we
3290 * think there is one), and the ultimate fallback "C". This is all done in
3291 * the same loop as above to avoid duplicating code, but it makes things
7d4bcc4a
KW
3292 * more complex. The 'trial_locales' array is initialized with just one
3293 * element; it causes the behavior described in the paragraph above this to
3294 * happen. If that fails, we add elements to 'trial_locales', and do extra
3295 * loop iterations to cause the behavior described in this paragraph.
6b058d42
KW
3296 *
3297 * On Ultrix, the locale MUST come from the environment, so there is
3298 * preliminary code to set it. I (khw) am not sure that it is necessary,
3299 * and that this couldn't be folded into the loop, but barring any real
3300 * platforms to test on, it's staying as-is
3301 *
3302 * A slight complication is that in embedded Perls, the locale may already
3303 * be set-up, and we don't want to get it from the normal environment
3304 * variables. This is handled by having a special environment variable
3305 * indicate we're in this situation. We simply set setlocale's 2nd
3306 * parameter to be a NULL instead of "". That indicates to setlocale that
3307 * it is not to change anything, but to return the current value,
3308 * effectively initializing perl's db to what the locale already is.
3309 *
3310 * We play the same trick with NULL if a LC_ALL succeeds. We call
3311 * setlocale() on the individual categores with NULL to get their existing
3312 * values for our db, instead of trying to change them.
3313 * */
98994639 3314
1565c085 3315
0e92a118
KW
3316 int ok = 1;
3317
7d4bcc4a
KW
3318#ifndef USE_LOCALE
3319
3320 PERL_UNUSED_ARG(printwarn);
3321
3322#else /* USE_LOCALE */
7d4bcc4a
KW
3323# ifdef __GLIBC__
3324
24f3e849 3325 const char * const language = PerlEnv_getenv("LANGUAGE");
7d4bcc4a
KW
3326
3327# endif
65ebb059 3328
ccd65d51
KW
3329 /* NULL uses the existing already set up locale */
3330 const char * const setlocale_init = (PerlEnv_getenv("PERL_SKIP_LOCALE_INIT"))
3331 ? NULL
3332 : "";
c3fcd832
KW
3333 const char* trial_locales[5]; /* 5 = 1 each for "", LC_ALL, LANG, "", C */
3334 unsigned int trial_locales_count;
24f3e849
KW
3335 const char * const lc_all = PerlEnv_getenv("LC_ALL");
3336 const char * const lang = PerlEnv_getenv("LANG");
98994639 3337 bool setlocale_failure = FALSE;
65ebb059 3338 unsigned int i;
175c4cf9
KW
3339
3340 /* A later getenv() could zap this, so only use here */
3341 const char * const bad_lang_use_once = PerlEnv_getenv("PERL_BADLANG");
3342
3343 const bool locwarn = (printwarn > 1
e5f10d49
KW
3344 || ( printwarn
3345 && ( ! bad_lang_use_once
22ff3130 3346 || (
e5f10d49
KW
3347 /* disallow with "" or "0" */
3348 *bad_lang_use_once
3349 && strNE("0", bad_lang_use_once)))));
ea92aad8 3350
291a84fb 3351 /* setlocale() return vals; not copied so must be looked at immediately */
8de4332b 3352 const char * sl_result[NOMINAL_LC_ALL_INDEX + 1];
291a84fb
KW
3353
3354 /* current locale for given category; should have been copied so aren't
3355 * volatile */
8de4332b 3356 const char * curlocales[NOMINAL_LC_ALL_INDEX + 1];
291a84fb 3357
7d4bcc4a
KW
3358# ifdef WIN32
3359
6bce99ee
JH
3360 /* In some systems you can find out the system default locale
3361 * and use that as the fallback locale. */
7d4bcc4a
KW
3362# define SYSTEM_DEFAULT_LOCALE
3363# endif
3364# ifdef SYSTEM_DEFAULT_LOCALE
3365
65ebb059 3366 const char *system_default_locale = NULL;
98994639 3367
7d4bcc4a 3368# endif
948523db
KW
3369
3370# ifndef DEBUGGING
3371# define DEBUG_LOCALE_INIT(a,b,c)
3372# else
7d4bcc4a 3373
8298454c 3374 DEBUG_INITIALIZATION_set(cBOOL(PerlEnv_getenv("PERL_DEBUG_LOCALE_INIT")));
7d4bcc4a
KW
3375
3376# define DEBUG_LOCALE_INIT(category, locale, result) \
2fcc0ca9
KW
3377 STMT_START { \
3378 if (debug_initialization) { \
3379 PerlIO_printf(Perl_debug_log, \
3380 "%s:%d: %s\n", \
3381 __FILE__, __LINE__, \
a4f00dcc 3382 setlocale_debug_string(category, \
2fcc0ca9
KW
3383 locale, \
3384 result)); \
3385 } \
3386 } STMT_END
2fcc0ca9 3387
948523db
KW
3388/* Make sure the parallel arrays are properly set up */
3389# ifdef USE_LOCALE_NUMERIC
3390 assert(categories[LC_NUMERIC_INDEX] == LC_NUMERIC);
3391 assert(strEQ(category_names[LC_NUMERIC_INDEX], "LC_NUMERIC"));
e9bc6d6b
KW
3392# ifdef USE_POSIX_2008_LOCALE
3393 assert(category_masks[LC_NUMERIC_INDEX] == LC_NUMERIC_MASK);
3394# endif
948523db
KW
3395# endif
3396# ifdef USE_LOCALE_CTYPE
3397 assert(categories[LC_CTYPE_INDEX] == LC_CTYPE);
3398 assert(strEQ(category_names[LC_CTYPE_INDEX], "LC_CTYPE"));
e9bc6d6b
KW
3399# ifdef USE_POSIX_2008_LOCALE
3400 assert(category_masks[LC_CTYPE_INDEX] == LC_CTYPE_MASK);
3401# endif
948523db
KW
3402# endif
3403# ifdef USE_LOCALE_COLLATE
3404 assert(categories[LC_COLLATE_INDEX] == LC_COLLATE);
3405 assert(strEQ(category_names[LC_COLLATE_INDEX], "LC_COLLATE"));
e9bc6d6b
KW
3406# ifdef USE_POSIX_2008_LOCALE
3407 assert(category_masks[LC_COLLATE_INDEX] == LC_COLLATE_MASK);
3408# endif
948523db
KW
3409# endif
3410# ifdef USE_LOCALE_TIME
3411 assert(categories[LC_TIME_INDEX] == LC_TIME);
3412 assert(strEQ(category_names[LC_TIME_INDEX], "LC_TIME"));
e9bc6d6b
KW
3413# ifdef USE_POSIX_2008_LOCALE
3414 assert(category_masks[LC_TIME_INDEX] == LC_TIME_MASK);
3415# endif
948523db
KW
3416# endif
3417# ifdef USE_LOCALE_MESSAGES
3418 assert(categories[LC_MESSAGES_INDEX] == LC_MESSAGES);
3419 assert(strEQ(category_names[LC_MESSAGES_INDEX], "LC_MESSAGES"));
e9bc6d6b
KW
3420# ifdef USE_POSIX_2008_LOCALE
3421 assert(category_masks[LC_MESSAGES_INDEX] == LC_MESSAGES_MASK);
3422# endif
948523db
KW
3423# endif
3424# ifdef USE_LOCALE_MONETARY
3425 assert(categories[LC_MONETARY_INDEX] == LC_MONETARY);
3426 assert(strEQ(category_names[LC_MONETARY_INDEX], "LC_MONETARY"));
e9bc6d6b
KW
3427# ifdef USE_POSIX_2008_LOCALE
3428 assert(category_masks[LC_MONETARY_INDEX] == LC_MONETARY_MASK);
3429# endif
948523db 3430# endif
9821811f
KW
3431# ifdef USE_LOCALE_ADDRESS
3432 assert(categories[LC_ADDRESS_INDEX] == LC_ADDRESS);
3433 assert(strEQ(category_names[LC_ADDRESS_INDEX], "LC_ADDRESS"));
e9bc6d6b
KW
3434# ifdef USE_POSIX_2008_LOCALE
3435 assert(category_masks[LC_ADDRESS_INDEX] == LC_ADDRESS_MASK);
3436# endif
9821811f
KW
3437# endif
3438# ifdef USE_LOCALE_IDENTIFICATION
3439 assert(categories[LC_IDENTIFICATION_INDEX] == LC_IDENTIFICATION);
3440 assert(strEQ(category_names[LC_IDENTIFICATION_INDEX], "LC_IDENTIFICATION"));
e9bc6d6b
KW
3441# ifdef USE_POSIX_2008_LOCALE
3442 assert(category_masks[LC_IDENTIFICATION_INDEX] == LC_IDENTIFICATION_MASK);
3443# endif
9821811f
KW
3444# endif
3445# ifdef USE_LOCALE_MEASUREMENT
3446 assert(categories[LC_MEASUREMENT_INDEX] == LC_MEASUREMENT);
3447 assert(strEQ(category_names[LC_MEASUREMENT_INDEX], "LC_MEASUREMENT"));
e9bc6d6b
KW
3448# ifdef USE_POSIX_2008_LOCALE
3449 assert(category_masks[LC_MEASUREMENT_INDEX] == LC_MEASUREMENT_MASK);
3450# endif
9821811f
KW
3451# endif
3452# ifdef USE_LOCALE_PAPER
3453 assert(categories[LC_PAPER_INDEX] == LC_PAPER);
3454 assert(strEQ(category_names[LC_PAPER_INDEX], "LC_PAPER"));
e9bc6d6b
KW
3455# ifdef USE_POSIX_2008_LOCALE
3456 assert(category_masks[LC_PAPER_INDEX] == LC_PAPER_MASK);
3457# endif
9821811f
KW
3458# endif
3459# ifdef USE_LOCALE_TELEPHONE
3460 assert(categories[LC_TELEPHONE_INDEX] == LC_TELEPHONE);
3461 assert(strEQ(category_names[LC_TELEPHONE_INDEX], "LC_TELEPHONE"));
e9bc6d6b
KW
3462# ifdef USE_POSIX_2008_LOCALE
3463 assert(category_masks[LC_TELEPHONE_INDEX] == LC_TELEPHONE_MASK);
3464# endif
9821811f 3465# endif
36dbc955
KW
3466# ifdef USE_LOCALE_SYNTAX
3467 assert(categories[LC_SYNTAX_INDEX] == LC_SYNTAX);
3468 assert(strEQ(category_names[LC_SYNTAX_INDEX], "LC_SYNTAX"));
3469# ifdef USE_POSIX_2008_LOCALE
3470 assert(category_masks[LC_SYNTAX_INDEX] == LC_SYNTAX_MASK);
3471# endif
3472# endif
3473# ifdef USE_LOCALE_TOD
3474 assert(categories[LC_TOD_INDEX] == LC_TOD);
3475 assert(strEQ(category_names[LC_TOD_INDEX], "LC_TOD"));
3476# ifdef USE_POSIX_2008_LOCALE
3477 assert(category_masks[LC_TOD_INDEX] == LC_TOD_MASK);
3478# endif
3479# endif
948523db
KW
3480# ifdef LC_ALL
3481 assert(categories[LC_ALL_INDEX] == LC_ALL);
3482 assert(strEQ(category_names[LC_ALL_INDEX], "LC_ALL"));
3483 assert(NOMINAL_LC_ALL_INDEX == LC_ALL_INDEX);
e9bc6d6b
KW
3484# ifdef USE_POSIX_2008_LOCALE
3485 assert(category_masks[LC_ALL_INDEX] == LC_ALL_MASK);
3486# endif
948523db
KW
3487# endif
3488# endif /* DEBUGGING */
47280b20 3489
5a6637f0
KW
3490 /* Initialize the per-thread mbrFOO() state variables. See POSIX.xs for
3491 * why these particular incantations are used. */
d2c9cb53
KW
3492#ifdef HAS_MBRLEN
3493 memzero(&PL_mbrlen_ps, sizeof(PL_mbrlen_ps));
3494#endif
5a6637f0
KW
3495#ifdef HAS_MBRTOWC
3496 memzero(&PL_mbrtowc_ps, sizeof(PL_mbrtowc_ps));
3497#endif
3498#ifdef HAS_WCTOMBR
3499 wcrtomb(NULL, L'\0', &PL_wcrtomb_ps);
3500#endif
d2c9cb53 3501
47280b20
KW
3502 /* Initialize the cache of the program's UTF-8ness for the always known
3503 * locales C and POSIX */
3504 my_strlcpy(PL_locale_utf8ness, C_and_POSIX_utf8ness,
3505 sizeof(PL_locale_utf8ness));
3506
e9bc6d6b
KW
3507# ifdef USE_THREAD_SAFE_LOCALE
3508# ifdef WIN32
3509
3510 _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
3511
3512# endif
3513# endif
39e69e77 3514# ifdef USE_POSIX_2008_LOCALE
e9bc6d6b
KW
3515
3516 PL_C_locale_obj = newlocale(LC_ALL_MASK, "C", (locale_t) 0);
3517 if (! PL_C_locale_obj) {
3518 Perl_croak_nocontext(
3519 "panic: Cannot create POSIX 2008 C locale object; errno=%d", errno);
3520 }
3521 if (DEBUG_Lv_TEST || debug_initialization) {
3522 PerlIO_printf(Perl_debug_log, "%s:%d: created C object %p\n", __FILE__, __LINE__, PL_C_locale_obj);
3523 }
3524
3525# endif
3526
78f7c09f
KW
3527# ifdef USE_LOCALE_NUMERIC
3528
3ca88433
KW
3529 PL_numeric_radix_sv = newSVpvs(".");
3530
78f7c09f
KW
3531# endif
3532
e9bc6d6b
KW
3533# if defined(USE_POSIX_2008_LOCALE) && ! defined(HAS_QUERYLOCALE)
3534
3535 /* Initialize our records. If we have POSIX 2008, we have LC_ALL */
3536 do_setlocale_c(LC_ALL, my_setlocale(LC_ALL, NULL));
3537
3538# endif
b56c4436 3539# ifdef LOCALE_ENVIRON_REQUIRED
98994639
HS
3540
3541 /*
3542 * Ultrix setlocale(..., "") fails if there are no environment
3543 * variables from which to get a locale name.
3544 */
3545
b56c4436
KW
3546# ifndef LC_ALL
3547# error Ultrix without LC_ALL not implemented
3548# else
7d4bcc4a 3549
b56c4436
KW
3550 {
3551 bool done = FALSE;
ea92aad8
KW
3552 if (lang) {
3553 sl_result[LC_ALL_INDEX] = do_setlocale_c(LC_ALL, setlocale_init);
3554 DEBUG_LOCALE_INIT(LC_ALL, setlocale_init, sl_result[LC_ALL_INDEX]);
3555 if (sl_result[LC_ALL_INDEX])
3556 done = TRUE;
3557 else
e5f10d49 3558 setlocale_failure = TRUE;
ea92aad8
KW
3559 }
3560 if (! setlocale_failure) {
3561 const char * locale_param;
3562 for (i = 0; i < LC_ALL_INDEX; i++) {
3563 locale_param = (! done && (lang || PerlEnv_getenv(category_names[i])))
3564 ? setlocale_init
3565 : NULL;
3566 sl_result[i] = do_setlocale_r(categories[i], locale_param);
3567 if (! sl_result[i]) {
3568 setlocale_failure = TRUE;
3569 }
3570 DEBUG_LOCALE_INIT(categories[i], locale_param, sl_result[i]);
e5f10d49 3571 }
c835d6be 3572 }
7d4bcc4a
KW
3573 }
3574
3575# endif /* LC_ALL */
e5f10d49 3576# endif /* LOCALE_ENVIRON_REQUIRED */
98994639 3577
65ebb059 3578 /* We try each locale in the list until we get one that works, or exhaust
20a240df
KW
3579 * the list. Normally the loop is executed just once. But if setting the
3580 * locale fails, inside the loop we add fallback trials to the array and so
3581 * will execute the loop multiple times */
c3fcd832
KW
3582 trial_locales[0] = setlocale_init;
3583 trial_locales_count = 1;
7d4bcc4a 3584
65ebb059
KW
3585 for (i= 0; i < trial_locales_count; i++) {
3586 const char * trial_locale = trial_locales[i];
3587
3588 if (i > 0) {
3589
3590 /* XXX This is to preserve old behavior for LOCALE_ENVIRON_REQUIRED
3591 * when i==0, but I (khw) don't think that behavior makes much
3592 * sense */
3593 setlocale_failure = FALSE;
3594
7d4bcc4a 3595# ifdef SYSTEM_DEFAULT_LOCALE
291a84fb 3596# ifdef WIN32 /* Note that assumes Win32 has LC_ALL */
7d4bcc4a 3597
65ebb059
KW
3598 /* On Windows machines, an entry of "" after the 0th means to use
3599 * the system default locale, which we now proceed to get. */
3600 if (strEQ(trial_locale, "")) {
3601 unsigned int j;
3602
3603 /* Note that this may change the locale, but we are going to do
3604 * that anyway just below */
837ce802 3605 system_default_locale = do_setlocale_c(LC_ALL, "");
5d1187d1 3606 DEBUG_LOCALE_INIT(LC_ALL, "", system_default_locale);
65ebb059 3607
7d4bcc4a 3608 /* Skip if invalid or if it's already on the list of locales to
65ebb059
KW
3609 * try */
3610 if (! system_default_locale) {
3611 goto next_iteration;
3612 }
3613 for (j = 0; j < trial_locales_count; j++) {
3614 if (strEQ(system_default_locale, trial_locales[j])) {
3615 goto next_iteration;
3616 }
3617 }
3618
3619 trial_locale = system_default_locale;
3620 }
ec0202b5
KW
3621# else
3622# error SYSTEM_DEFAULT_LOCALE only implemented for Win32
3623# endif
7d4bcc4a 3624# endif /* SYSTEM_DEFAULT_LOCALE */
291a84fb
KW
3625
3626 } /* For i > 0 */
65ebb059 3627
7d4bcc4a
KW
3628# ifdef LC_ALL
3629
948523db
KW
3630 sl_result[LC_ALL_INDEX] = do_setlocale_c(LC_ALL, trial_locale);
3631 DEBUG_LOCALE_INIT(LC_ALL, trial_locale, sl_result[LC_ALL_INDEX]);
3632 if (! sl_result[LC_ALL_INDEX]) {
49c85077 3633 setlocale_failure = TRUE;
7cd8b568
KW
3634 }
3635 else {
3636 /* Since LC_ALL succeeded, it should have changed all the other
3637 * categories it can to its value; so we massage things so that the
3638 * setlocales below just return their category's current values.
3639 * This adequately handles the case in NetBSD where LC_COLLATE may
3640 * not be defined for a locale, and setting it individually will
7d4bcc4a 3641 * fail, whereas setting LC_ALL succeeds, leaving LC_COLLATE set to
7cd8b568
KW
3642 * the POSIX locale. */
3643 trial_locale = NULL;
3644 }
7d4bcc4a
KW
3645
3646# endif /* LC_ALL */
98994639 3647
e5f10d49
KW
3648 if (! setlocale_failure) {
3649 unsigned int j;
3650 for (j = 0; j < NOMINAL_LC_ALL_INDEX; j++) {
3651 curlocales[j]
3652 = savepv(do_setlocale_r(categories[j], trial_locale));
3653 if (! curlocales[j]) {
3654 setlocale_failure = TRUE;
3655 }
3656 DEBUG_LOCALE_INIT(categories[j], trial_locale, curlocales[j]);
3657 }
c835d6be 3658
e5f10d49
KW
3659 if (! setlocale_failure) { /* All succeeded */
3660 break; /* Exit trial_locales loop */
49c85077 3661 }
65ebb059 3662 }
98994639 3663
49c85077
KW
3664 /* Here, something failed; will need to try a fallback. */
3665 ok = 0;
65ebb059 3666
49c85077
KW
3667 if (i == 0) {
3668 unsigned int j;
98994639 3669
65ebb059 3670 if (locwarn) { /* Output failure info only on the first one */
7d4bcc4a
KW
3671
3672# ifdef LC_ALL
98994639 3673
49c85077
KW
3674 PerlIO_printf(Perl_error_log,
3675 "perl: warning: Setting locale failed.\n");
98994639 3676
7d4bcc4a 3677# else /* !LC_ALL */
98994639 3678
49c85077
KW
3679 PerlIO_printf(Perl_error_log,
3680 "perl: warning: Setting locale failed for the categories:\n\t");
7d4bcc4a 3681
e5f10d49
KW
3682 for (j = 0; j < NOMINAL_LC_ALL_INDEX; j++) {
3683 if (! curlocales[j]) {
3684 PerlIO_printf(Perl_error_log, category_names[j]);
3685 }
3686 else {
3687 Safefree(curlocales[j]);
3688 }
3689 }
7d4bcc4a 3690
7d4bcc4a 3691# endif /* LC_ALL */
98994639 3692
49c85077
KW
3693 PerlIO_printf(Perl_error_log,
3694 "perl: warning: Please check that your locale settings:\n");
98994639 3695
7d4bcc4a
KW
3696# ifdef __GLIBC__
3697
49c85077
KW
3698 PerlIO_printf(Perl_error_log,
3699 "\tLANGUAGE = %c%s%c,\n",
3700 language ? '"' : '(',
3701 language ? language : "unset",
3702 language ? '"' : ')');
7d4bcc4a 3703# endif
98994639 3704
49c85077
KW
3705 PerlIO_printf(Perl_error_log,
3706 "\tLC_ALL = %c%s%c,\n",
3707 lc_all ? '"' : '(',
3708 lc_all ? lc_all : "unset",
3709 lc_all ? '"' : ')');
98994639 3710
7d4bcc4a
KW
3711# if defined(USE_ENVIRON_ARRAY)
3712
49c85077 3713 {
cd999af9 3714 char **e;
d5e32b93
KW
3715
3716 /* Look through the environment for any variables of the
3717 * form qr/ ^ LC_ [A-Z]+ = /x, except LC_ALL which was
3718 * already handled above. These are assumed to be locale
3719 * settings. Output them and their values. */
cd999af9 3720 for (e = environ; *e; e++) {
d5e32b93
KW
3721 const STRLEN prefix_len = sizeof("LC_") - 1;
3722 STRLEN uppers_len;
3723
cd999af9 3724 if ( strBEGINs(*e, "LC_")
c8b388b0 3725 && ! strBEGINs(*e, "LC_ALL=")
d5e32b93
KW
3726 && (uppers_len = strspn(*e + prefix_len,
3727 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"))
3728 && ((*e)[prefix_len + uppers_len] == '='))
cd999af9
KW
3729 {
3730 PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
d5e32b93
KW
3731 (int) (prefix_len + uppers_len), *e,
3732 *e + prefix_len + uppers_len + 1);
cd999af9
KW
3733 }
3734 }
49c85077 3735 }
7d4bcc4a
KW
3736
3737# else
3738
49c85077
KW
3739 PerlIO_printf(Perl_error_log,
3740 "\t(possibly more locale environment variables)\n");
7d4bcc4a
KW
3741
3742# endif
98994639 3743
49c85077
KW
3744 PerlIO_printf(Perl_error_log,
3745 "\tLANG = %c%s%c\n",
3746 lang ? '"' : '(',
3747 lang ? lang : "unset",
3748 lang ? '"' : ')');
98994639 3749
49c85077
KW
3750 PerlIO_printf(Perl_error_log,
3751 " are supported and installed on your system.\n");
3752 }
98994639 3753
65ebb059 3754 /* Calculate what fallback locales to try. We have avoided this
f6bab5f6 3755 * until we have to, because failure is quite unlikely. This will
65ebb059
KW
3756 * usually change the upper bound of the loop we are in.
3757 *
3758 * Since the system's default way of setting the locale has not
3759 * found one that works, We use Perl's defined ordering: LC_ALL,
3760 * LANG, and the C locale. We don't try the same locale twice, so
3761 * don't add to the list if already there. (On POSIX systems, the
3762 * LC_ALL element will likely be a repeat of the 0th element "",
6b058d42
KW
3763 * but there's no harm done by doing it explicitly.
3764 *
3765 * Note that this tries the LC_ALL environment variable even on
3766 * systems which have no LC_ALL locale setting. This may or may
3767 * not have been originally intentional, but there's no real need
3768 * to change the behavior. */
65ebb059
KW
3769 if (lc_all) {
3770 for (j = 0; j < trial_locales_count; j++) {
3771 if (strEQ(lc_all, trial_locales[j])) {
3772 goto done_lc_all;
3773 }
3774 }
3775 trial_locales[trial_locales_count++] = lc_all;
3776 }
3777 done_lc_all:
98994639 3778
65ebb059
KW
3779 if (lang) {
3780 for (j = 0; j < trial_locales_count; j++) {
3781 if (strEQ(lang, trial_locales[j])) {
3782 goto done_lang;
3783 }
3784 }
3785 trial_locales[trial_locales_count++] = lang;
3786 }
3787 done_lang:
3788
7d4bcc4a
KW
3789# if defined(WIN32) && defined(LC_ALL)
3790
65ebb059
KW
3791 /* For Windows, we also try the system default locale before "C".
3792 * (If there exists a Windows without LC_ALL we skip this because
3793 * it gets too complicated. For those, the "C" is the next
3794 * fallback possibility). The "" is the same as the 0th element of
3795 * the array, but the code at the loop above knows to treat it
3796 * differently when not the 0th */
3797 trial_locales[trial_locales_count++] = "";
7d4bcc4a
KW
3798
3799# endif
65ebb059
KW
3800
3801 for (j = 0; j < trial_locales_count; j++) {
3802 if (strEQ("C", trial_locales[j])) {
3803 goto done_C;
3804 }
3805 }
3806 trial_locales[trial_locales_count++] = "C";
98994639 3807
65ebb059
KW
3808 done_C: ;
3809 } /* end of first time through the loop */
98994639 3810
7d4bcc4a
KW
3811# ifdef WIN32
3812
65ebb059 3813 next_iteration: ;
7d4bcc4a
KW
3814
3815# endif
65ebb059
KW
3816
3817 } /* end of looping through the trial locales */
3818
3819 if (ok < 1) { /* If we tried to fallback */
3820 const char* msg;
3821 if (! setlocale_failure) { /* fallback succeeded */
3822 msg = "Falling back to";
3823 }
3824 else { /* fallback failed */
e5f10d49 3825 unsigned int j;
98994639 3826
65ebb059
KW
3827 /* We dropped off the end of the loop, so have to decrement i to
3828 * get back to the value the last time through */
3829 i--;
98994639 3830
65ebb059
KW
3831 ok = -1;
3832 msg = "Failed to fall back to";
3833
3834 /* To continue, we should use whatever values we've got */
7d4bcc4a 3835
e5f10d49
KW
3836 for (j = 0; j < NOMINAL_LC_ALL_INDEX; j++) {
3837 Safefree(curlocales[j]);
3838 curlocales[j] = savepv(do_setlocale_r(categories[j], NULL));
3839 DEBUG_LOCALE_INIT(categories[j], NULL, curlocales[j]);
3840 }
65ebb059
KW
3841 }
3842
3843 if (locwarn) {
3844 const char * description;
3845 const char * name = "";
3846 if (strEQ(trial_locales[i], "C")) {
3847 description = "the standard locale";
3848 name = "C";
3849 }
7d4bcc4a
KW
3850
3851# ifdef SYSTEM_DEFAULT_LOCALE
3852
65ebb059
KW
3853 else if (strEQ(trial_locales[i], "")) {
3854 description = "the system default locale";
3855 if (system_default_locale) {
3856 name = system_default_locale;
3857 }
3858 }