3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 * 2002, 2003, 2005, 2006, 2007, 2008 by Larry Wall and others
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.
12 * A Elbereth Gilthoniel,
13 * silivren penna míriel
14 * o menel aglar elenath!
15 * Na-chaered palan-díriel
16 * o galadhremmin ennorath,
17 * Fanuilos, le linnathon
18 * nef aear, si nef aearon!
20 * [p.238 of _The Lord of the Rings_, II/i: "Many Meetings"]
23 /* utility functions for handling locale-specific stuff like what
24 * character represents the decimal point.
26 * All C programs have an underlying locale. Perl generally doesn't pay any
27 * attention to it except within the scope of a 'use locale'. For most
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
32 * the desired behavior of those functions at the moment.
36 #define PERL_IN_LOCALE_C
40 # include <langinfo.h>
48 * Standardize the locale name from a string returned by 'setlocale', possibly
49 * modifying that string.
51 * The typical return value of setlocale() is either
52 * (1) "xx_YY" if the first argument of setlocale() is not LC_ALL
53 * (2) "xa_YY xb_YY ..." if the first argument of setlocale() is LC_ALL
54 * (the space-separated values represent the various sublocales,
55 * in some unspecified order). This is not handled by this function.
57 * In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n",
58 * which is harmful for further use of the string in setlocale(). This
59 * function removes the trailing new line and everything up through the '='
63 S_stdize_locale(pTHX_ char *locs)
65 const char * const s = strchr(locs, '=');
68 PERL_ARGS_ASSERT_STDIZE_LOCALE;
71 const char * const t = strchr(s, '.');
74 const char * const u = strchr(t, '\n');
75 if (u && (u[1] == 0)) {
76 const STRLEN len = u - s;
77 Move(s + 1, locs, len, char);
85 Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs);
93 Perl_set_numeric_radix(pTHX)
95 #ifdef USE_LOCALE_NUMERIC
96 # ifdef HAS_LOCALECONV
97 const struct lconv* const lc = localeconv();
99 if (lc && lc->decimal_point) {
100 if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) {
101 SvREFCNT_dec(PL_numeric_radix_sv);
102 PL_numeric_radix_sv = NULL;
105 if (PL_numeric_radix_sv)
106 sv_setpv(PL_numeric_radix_sv, lc->decimal_point);
108 PL_numeric_radix_sv = newSVpv(lc->decimal_point, 0);
109 if (! is_ascii_string((U8 *) lc->decimal_point, 0)
110 && is_utf8_string((U8 *) lc->decimal_point, 0)
111 && _is_cur_LC_category_utf8(LC_NUMERIC))
113 SvUTF8_on(PL_numeric_radix_sv);
118 PL_numeric_radix_sv = NULL;
120 DEBUG_L(PerlIO_printf(Perl_debug_log, "Locale radix is %s\n",
121 (PL_numeric_radix_sv)
125 # endif /* HAS_LOCALECONV */
126 #endif /* USE_LOCALE_NUMERIC */
129 /* Is the C string input 'name' "C" or "POSIX"? If so, and 'name' is the
130 * return of setlocale(), then this is extremely likely to be the C or POSIX
131 * locale. However, the output of setlocale() is documented to be opaque, but
132 * the odds are extremely small that it would return these two strings for some
133 * other locale. Note that VMS in these two locales includes many non-ASCII
134 * characters as controls and punctuation (below are hex bytes):
135 * cntrl: 00-1F 7F 84-97 9B-9F
136 * punct: 21-2F 3A-40 5B-60 7B-7E A1-A3 A5 A7-AB B0-B3 B5-B7 B9-BD BF-CF D1-DD DF-EF F1-FD
137 * Oddly, none there are listed as alphas, though some represent alphabetics
138 * http://www.nntp.perl.org/group/perl.perl5.porters/2013/02/msg198753.html */
139 #define isNAME_C_OR_POSIX(name) ((name) != NULL \
140 && ((*(name) == 'C' && (*(name + 1)) == '\0') \
141 || strEQ((name), "POSIX")))
144 Perl_new_numeric(pTHX_ const char *newnum)
146 #ifdef USE_LOCALE_NUMERIC
148 /* Called after all libc setlocale() calls affecting LC_NUMERIC, to tell
149 * core Perl this and that 'newnum' is the name of the new locale.
150 * It installs this locale as the current underlying default.
152 * The default locale and the C locale can be toggled between by use of the
153 * set_numeric_local() and set_numeric_standard() functions, which should
154 * probably not be called directly, but only via macros like
155 * SET_NUMERIC_STANDARD() in perl.h.
157 * The toggling is necessary mainly so that a non-dot radix decimal point
158 * character can be output, while allowing internal calculations to use a
161 * This sets several interpreter-level variables:
162 * PL_numeric_name The underlying locale's name: a copy of 'newnum'
163 * PL_numeric_local A boolean indicating if the toggled state is such
164 * that the current locale is the program's underlying
166 * PL_numeric_standard An int indicating if the toggled state is such
167 * that the current locale is the C locale. If non-zero,
168 * it is in C; if > 1, it means it may not be toggled away
170 * Note that both of the last two variables can be true at the same time,
171 * if the underlying locale is C. (Toggling is a no-op under these
174 * Any code changing the locale (outside this file) should use
175 * POSIX::setlocale, which calls this function. Therefore this function
176 * should be called directly only from this file and from
177 * POSIX::setlocale() */
182 Safefree(PL_numeric_name);
183 PL_numeric_name = NULL;
184 PL_numeric_standard = TRUE;
185 PL_numeric_local = TRUE;
189 save_newnum = stdize_locale(savepv(newnum));
190 if (! PL_numeric_name || strNE(PL_numeric_name, save_newnum)) {
191 Safefree(PL_numeric_name);
192 PL_numeric_name = save_newnum;
195 PL_numeric_standard = isNAME_C_OR_POSIX(save_newnum);
196 PL_numeric_local = TRUE;
198 /* Keep LC_NUMERIC in the C locale. This is for XS modules, so they don't
199 * have to worry about the radix being a non-dot. (Core operations that
200 * need the underlying locale change to it temporarily). */
201 set_numeric_standard();
206 PERL_UNUSED_ARG(newnum);
207 #endif /* USE_LOCALE_NUMERIC */
211 Perl_set_numeric_standard(pTHX)
213 #ifdef USE_LOCALE_NUMERIC
214 /* Toggle the LC_NUMERIC locale to C. Most code should use the macros like
215 * SET_NUMERIC_STANDARD() in perl.h instead of calling this directly. The
216 * macro avoids calling this routine if toggling isn't necessary according
217 * to our records (which could be wrong if some XS code has changed the
218 * locale behind our back) */
220 setlocale(LC_NUMERIC, "C");
221 PL_numeric_standard = TRUE;
222 PL_numeric_local = isNAME_C_OR_POSIX(PL_numeric_name);
224 DEBUG_L(PerlIO_printf(Perl_debug_log,
225 "Underlying LC_NUMERIC locale now is C\n"));
227 #endif /* USE_LOCALE_NUMERIC */
231 Perl_set_numeric_local(pTHX)
233 #ifdef USE_LOCALE_NUMERIC
234 /* Toggle the LC_NUMERIC locale to the current underlying default. Most
235 * code should use the macros like SET_NUMERIC_LOCAL() in perl.h instead of
236 * calling this directly. The macro avoids calling this routine if
237 * toggling isn't necessary according to our records (which could be wrong
238 * if some XS code has changed the locale behind our back) */
240 setlocale(LC_NUMERIC, PL_numeric_name);
241 PL_numeric_standard = isNAME_C_OR_POSIX(PL_numeric_name);
242 PL_numeric_local = TRUE;
244 DEBUG_L(PerlIO_printf(Perl_debug_log,
245 "Underlying LC_NUMERIC locale now is %s\n",
248 #endif /* USE_LOCALE_NUMERIC */
252 * Set up for a new ctype locale.
255 Perl_new_ctype(pTHX_ const char *newctype)
257 #ifdef USE_LOCALE_CTYPE
259 /* Called after all libc setlocale() calls affecting LC_CTYPE, to tell
260 * core Perl this and that 'newctype' is the name of the new locale.
262 * This function sets up the folding arrays for all 256 bytes, assuming
263 * that tofold() is tolc() since fold case is not a concept in POSIX,
265 * Any code changing the locale (outside this file) should use
266 * POSIX::setlocale, which calls this function. Therefore this function
267 * should be called directly only from this file and from
268 * POSIX::setlocale() */
273 PERL_ARGS_ASSERT_NEW_CTYPE;
275 PL_in_utf8_CTYPE_locale = _is_cur_LC_category_utf8(LC_CTYPE);
277 /* A UTF-8 locale gets standard rules. But note that code still has to
278 * handle this specially because of the three problematic code points */
279 if (PL_in_utf8_CTYPE_locale) {
280 Copy(PL_fold_latin1, PL_fold_locale, 256, U8);
283 for (i = 0; i < 256; i++) {
284 if (isUPPER_LC((U8) i))
285 PL_fold_locale[i] = (U8) toLOWER_LC((U8) i);
286 else if (isLOWER_LC((U8) i))
287 PL_fold_locale[i] = (U8) toUPPER_LC((U8) i);
289 PL_fold_locale[i] = (U8) i;
293 #endif /* USE_LOCALE_CTYPE */
294 PERL_ARGS_ASSERT_NEW_CTYPE;
295 PERL_UNUSED_ARG(newctype);
300 Perl_new_collate(pTHX_ const char *newcoll)
302 #ifdef USE_LOCALE_COLLATE
304 /* Called after all libc setlocale() calls affecting LC_COLLATE, to tell
305 * core Perl this and that 'newcoll' is the name of the new locale.
307 * Any code changing the locale (outside this file) should use
308 * POSIX::setlocale, which calls this function. Therefore this function
309 * should be called directly only from this file and from
310 * POSIX::setlocale() */
313 if (PL_collation_name) {
315 Safefree(PL_collation_name);
316 PL_collation_name = NULL;
318 PL_collation_standard = TRUE;
319 PL_collxfrm_base = 0;
320 PL_collxfrm_mult = 2;
324 if (! PL_collation_name || strNE(PL_collation_name, newcoll)) {
326 Safefree(PL_collation_name);
327 PL_collation_name = stdize_locale(savepv(newcoll));
328 PL_collation_standard = isNAME_C_OR_POSIX(newcoll);
331 /* 2: at most so many chars ('a', 'b'). */
332 /* 50: surely no system expands a char more. */
333 #define XFRMBUFSIZE (2 * 50)
334 char xbuf[XFRMBUFSIZE];
335 const Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
336 const Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
337 const SSize_t mult = fb - fa;
338 if (mult < 1 && !(fa == 0 && fb == 0))
339 Perl_croak(aTHX_ "panic: strxfrm() gets absurd - a => %"UVuf", ab => %"UVuf,
341 PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0;
342 PL_collxfrm_mult = mult;
347 PERL_UNUSED_ARG(newcoll);
348 #endif /* USE_LOCALE_COLLATE */
354 Perl_my_setlocale(pTHX_ int category, const char* locale)
356 /* This, for Windows, emulates POSIX setlocale() behavior. There is no
357 * difference unless the input locale is "", which means on Windows to get
358 * the machine default, which is set via the computer's "Regional and
359 * Language Options" (or its current equivalent). In POSIX, it instead
360 * means to find the locale from the user's environment. This routine
361 * looks in the environment, and, if anything is found, uses that instead
362 * of going to the machine default. If there is no environment override,
363 * the machine default is used, as normal, by calling the real setlocale()
364 * with "". The POSIX behavior is to use the LC_ALL variable if set;
365 * otherwise to use the particular category's variable if set; otherwise to
366 * use the LANG variable. */
368 bool override_LC_ALL = 0;
371 if (locale && strEQ(locale, "")) {
373 locale = PerlEnv_getenv("LC_ALL");
379 override_LC_ALL = TRUE;
380 break; /* We already know its variable isn't set */
382 # ifdef USE_LOCALE_TIME
384 locale = PerlEnv_getenv("LC_TIME");
387 # ifdef USE_LOCALE_CTYPE
389 locale = PerlEnv_getenv("LC_CTYPE");
392 # ifdef USE_LOCALE_COLLATE
394 locale = PerlEnv_getenv("LC_COLLATE");
397 # ifdef USE_LOCALE_MONETARY
399 locale = PerlEnv_getenv("LC_MONETARY");
402 # ifdef USE_LOCALE_NUMERIC
404 locale = PerlEnv_getenv("LC_NUMERIC");
407 # ifdef USE_LOCALE_MESSAGES
409 locale = PerlEnv_getenv("LC_MESSAGES");
413 /* This is a category, like PAPER_SIZE that we don't
414 * know about; and so can't provide a wrapper. */
418 locale = PerlEnv_getenv("LANG");
428 result = setlocale(category, locale);
430 if (! override_LC_ALL) {
434 /* Here the input locale was LC_ALL, and we have set it to what is in the
435 * LANG variable or the system default if there is no LANG. But these have
436 * lower priority than the other LC_foo variables, so override it for each
437 * one that is set. (If they are set to "", it means to use the same thing
438 * we just set LC_ALL to, so can skip) */
439 # ifdef USE_LOCALE_TIME
440 result = PerlEnv_getenv("LC_TIME");
441 if (result && strNE(result, "")) {
442 setlocale(LC_TIME, result);
445 # ifdef USE_LOCALE_CTYPE
446 result = PerlEnv_getenv("LC_CTYPE");
447 if (result && strNE(result, "")) {
448 setlocale(LC_CTYPE, result);
451 # ifdef USE_LOCALE_COLLATE
452 result = PerlEnv_getenv("LC_COLLATE");
453 if (result && strNE(result, "")) {
454 setlocale(LC_COLLATE, result);
457 # ifdef USE_LOCALE_MONETARY
458 result = PerlEnv_getenv("LC_MONETARY");
459 if (result && strNE(result, "")) {
460 setlocale(LC_MONETARY, result);
463 # ifdef USE_LOCALE_NUMERIC
464 result = PerlEnv_getenv("LC_NUMERIC");
465 if (result && strNE(result, "")) {
466 setlocale(LC_NUMERIC, result);
469 # ifdef USE_LOCALE_MESSAGES
470 result = PerlEnv_getenv("LC_MESSAGES");
471 if (result && strNE(result, "")) {
472 setlocale(LC_MESSAGES, result);
476 return setlocale(LC_ALL, NULL);
484 * Initialize locale awareness.
487 Perl_init_i18nl10n(pTHX_ int printwarn)
491 * 0 if not to output warning when setup locale is bad
492 * 1 if to output warning based on value of PERL_BADLANG
493 * >1 if to output regardless of PERL_BADLANG
496 * 1 = set ok or not applicable,
497 * 0 = fallback to a locale of lower priority
498 * -1 = fallback to all locales failed, not even to the C locale
503 #if defined(USE_LOCALE)
504 #ifdef USE_LOCALE_CTYPE
505 char *curctype = NULL;
506 #endif /* USE_LOCALE_CTYPE */
507 #ifdef USE_LOCALE_COLLATE
508 char *curcoll = NULL;
509 #endif /* USE_LOCALE_COLLATE */
510 #ifdef USE_LOCALE_NUMERIC
512 #endif /* USE_LOCALE_NUMERIC */
514 char * const language = PerlEnv_getenv("LANGUAGE");
517 /* NULL uses the existing already set up locale */
518 const char * const setlocale_init = (PerlEnv_getenv("PERL_SKIP_LOCALE_INIT"))
521 const char* trial_locales[5]; /* 5 = 1 each for "", LC_ALL, LANG, "", C */
522 unsigned int trial_locales_count;
523 char * const lc_all = PerlEnv_getenv("LC_ALL");
524 char * const lang = PerlEnv_getenv("LANG");
525 bool setlocale_failure = FALSE;
528 const bool locwarn = (printwarn > 1 ||
530 (!(p = PerlEnv_getenv("PERL_BADLANG")) ||
531 grok_atou(p, NULL))));
534 /* In some systems you can find out the system default locale
535 * and use that as the fallback locale. */
536 # define SYSTEM_DEFAULT_LOCALE
538 #ifdef SYSTEM_DEFAULT_LOCALE
539 const char *system_default_locale = NULL;
542 #ifndef LOCALE_ENVIRON_REQUIRED
543 PERL_UNUSED_VAR(done);
547 * Ultrix setlocale(..., "") fails if there are no environment
548 * variables from which to get a locale name.
553 if (my_setlocale(LC_ALL, setlocale_init))
556 setlocale_failure = TRUE;
558 if (!setlocale_failure) {
559 # ifdef USE_LOCALE_CTYPE
562 my_setlocale(LC_CTYPE,
563 (!done && (lang || PerlEnv_getenv("LC_CTYPE")))
564 ? setlocale_init : NULL)))
565 setlocale_failure = TRUE;
567 curctype = savepv(curctype);
568 # endif /* USE_LOCALE_CTYPE */
569 # ifdef USE_LOCALE_COLLATE
572 my_setlocale(LC_COLLATE,
573 (!done && (lang || PerlEnv_getenv("LC_COLLATE")))
574 ? setlocale_init : NULL)))
575 setlocale_failure = TRUE;
577 curcoll = savepv(curcoll);
578 # endif /* USE_LOCALE_COLLATE */
579 # ifdef USE_LOCALE_NUMERIC
582 my_setlocale(LC_NUMERIC,
583 (!done && (lang || PerlEnv_getenv("LC_NUMERIC")))
584 ? setlocale_init : NULL)))
585 setlocale_failure = TRUE;
587 curnum = savepv(curnum);
588 # endif /* USE_LOCALE_NUMERIC */
589 # ifdef USE_LOCALE_MESSAGES
590 if (! my_setlocale(LC_MESSAGES,
591 (!done && (lang || PerlEnv_getenv("LC_MESSAGES")))
592 ? setlocale_init : NULL))
594 setlocale_failure = TRUE;
596 # endif /* USE_LOCALE_MESSAGES */
597 # ifdef USE_LOCALE_MONETARY
598 if (! my_setlocale(LC_MONETARY,
599 (!done && (lang || PerlEnv_getenv("LC_MONETARY")))
600 ? setlocale_init : NULL))
602 setlocale_failure = TRUE;
604 # endif /* USE_LOCALE_MONETARY */
609 #endif /* !LOCALE_ENVIRON_REQUIRED */
611 /* We try each locale in the list until we get one that works, or exhaust
613 trial_locales[0] = setlocale_init;
614 trial_locales_count = 1;
615 for (i= 0; i < trial_locales_count; i++) {
616 const char * trial_locale = trial_locales[i];
620 /* XXX This is to preserve old behavior for LOCALE_ENVIRON_REQUIRED
621 * when i==0, but I (khw) don't think that behavior makes much
623 setlocale_failure = FALSE;
625 #ifdef SYSTEM_DEFAULT_LOCALE
627 /* On Windows machines, an entry of "" after the 0th means to use
628 * the system default locale, which we now proceed to get. */
629 if (strEQ(trial_locale, "")) {
632 /* Note that this may change the locale, but we are going to do
633 * that anyway just below */
634 system_default_locale = setlocale(LC_ALL, "");
636 /* Skip if invalid or it's already on the list of locales to
638 if (! system_default_locale) {
641 for (j = 0; j < trial_locales_count; j++) {
642 if (strEQ(system_default_locale, trial_locales[j])) {
647 trial_locale = system_default_locale;
650 #endif /* SYSTEM_DEFAULT_LOCALE */
654 if (! my_setlocale(LC_ALL, trial_locale)) {
655 setlocale_failure = TRUE;
658 /* Since LC_ALL succeeded, it should have changed all the other
659 * categories it can to its value; so we massage things so that the
660 * setlocales below just return their category's current values.
661 * This adequately handles the case in NetBSD where LC_COLLATE may
662 * not be defined for a locale, and setting it individually will
663 * fail, whereas setting LC_ALL suceeds, leaving LC_COLLATE set to
664 * the POSIX locale. */
669 if (!setlocale_failure) {
670 #ifdef USE_LOCALE_CTYPE
672 if (! (curctype = my_setlocale(LC_CTYPE, trial_locale)))
673 setlocale_failure = TRUE;
675 curctype = savepv(curctype);
676 #endif /* USE_LOCALE_CTYPE */
677 #ifdef USE_LOCALE_COLLATE
679 if (! (curcoll = my_setlocale(LC_COLLATE, trial_locale)))
680 setlocale_failure = TRUE;
682 curcoll = savepv(curcoll);
683 #endif /* USE_LOCALE_COLLATE */
684 #ifdef USE_LOCALE_NUMERIC
686 if (! (curnum = my_setlocale(LC_NUMERIC, trial_locale)))
687 setlocale_failure = TRUE;
689 curnum = savepv(curnum);
690 #endif /* USE_LOCALE_NUMERIC */
691 #ifdef USE_LOCALE_MESSAGES
692 if (! (my_setlocale(LC_MESSAGES, trial_locale)))
693 setlocale_failure = TRUE;
694 #endif /* USE_LOCALE_MESSAGES */
695 #ifdef USE_LOCALE_MONETARY
696 if (! (my_setlocale(LC_MONETARY, trial_locale)))
697 setlocale_failure = TRUE;
698 #endif /* USE_LOCALE_MONETARY */
700 if (! setlocale_failure) { /* Success */
705 /* Here, something failed; will need to try a fallback. */
711 if (locwarn) { /* Output failure info only on the first one */
714 PerlIO_printf(Perl_error_log,
715 "perl: warning: Setting locale failed.\n");
719 PerlIO_printf(Perl_error_log,
720 "perl: warning: Setting locale failed for the categories:\n\t");
721 #ifdef USE_LOCALE_CTYPE
723 PerlIO_printf(Perl_error_log, "LC_CTYPE ");
724 #endif /* USE_LOCALE_CTYPE */
725 #ifdef USE_LOCALE_COLLATE
727 PerlIO_printf(Perl_error_log, "LC_COLLATE ");
728 #endif /* USE_LOCALE_COLLATE */
729 #ifdef USE_LOCALE_NUMERIC
731 PerlIO_printf(Perl_error_log, "LC_NUMERIC ");
732 #endif /* USE_LOCALE_NUMERIC */
733 PerlIO_printf(Perl_error_log, "and possibly others\n");
737 PerlIO_printf(Perl_error_log,
738 "perl: warning: Please check that your locale settings:\n");
741 PerlIO_printf(Perl_error_log,
742 "\tLANGUAGE = %c%s%c,\n",
743 language ? '"' : '(',
744 language ? language : "unset",
745 language ? '"' : ')');
748 PerlIO_printf(Perl_error_log,
749 "\tLC_ALL = %c%s%c,\n",
751 lc_all ? lc_all : "unset",
754 #if defined(USE_ENVIRON_ARRAY)
757 for (e = environ; *e; e++) {
758 if (strnEQ(*e, "LC_", 3)
759 && strnNE(*e, "LC_ALL=", 7)
760 && (p = strchr(*e, '=')))
761 PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
762 (int)(p - *e), *e, p + 1);
766 PerlIO_printf(Perl_error_log,
767 "\t(possibly more locale environment variables)\n");
770 PerlIO_printf(Perl_error_log,
773 lang ? lang : "unset",
776 PerlIO_printf(Perl_error_log,
777 " are supported and installed on your system.\n");
780 /* Calculate what fallback locales to try. We have avoided this
781 * until we have to, becuase failure is quite unlikely. This will
782 * usually change the upper bound of the loop we are in.
784 * Since the system's default way of setting the locale has not
785 * found one that works, We use Perl's defined ordering: LC_ALL,
786 * LANG, and the C locale. We don't try the same locale twice, so
787 * don't add to the list if already there. (On POSIX systems, the
788 * LC_ALL element will likely be a repeat of the 0th element "",
789 * but there's no harm done by doing it explicitly */
791 for (j = 0; j < trial_locales_count; j++) {
792 if (strEQ(lc_all, trial_locales[j])) {
796 trial_locales[trial_locales_count++] = lc_all;
801 for (j = 0; j < trial_locales_count; j++) {
802 if (strEQ(lang, trial_locales[j])) {
806 trial_locales[trial_locales_count++] = lang;
810 #if defined(WIN32) && defined(LC_ALL)
811 /* For Windows, we also try the system default locale before "C".
812 * (If there exists a Windows without LC_ALL we skip this because
813 * it gets too complicated. For those, the "C" is the next
814 * fallback possibility). The "" is the same as the 0th element of
815 * the array, but the code at the loop above knows to treat it
816 * differently when not the 0th */
817 trial_locales[trial_locales_count++] = "";
820 for (j = 0; j < trial_locales_count; j++) {
821 if (strEQ("C", trial_locales[j])) {
825 trial_locales[trial_locales_count++] = "C";
828 } /* end of first time through the loop */
834 } /* end of looping through the trial locales */
836 if (ok < 1) { /* If we tried to fallback */
838 if (! setlocale_failure) { /* fallback succeeded */
839 msg = "Falling back to";
841 else { /* fallback failed */
843 /* We dropped off the end of the loop, so have to decrement i to
844 * get back to the value the last time through */
848 msg = "Failed to fall back to";
850 /* To continue, we should use whatever values we've got */
851 #ifdef USE_LOCALE_CTYPE
853 curctype = savepv(setlocale(LC_CTYPE, NULL));
854 #endif /* USE_LOCALE_CTYPE */
855 #ifdef USE_LOCALE_COLLATE
857 curcoll = savepv(setlocale(LC_COLLATE, NULL));
858 #endif /* USE_LOCALE_COLLATE */
859 #ifdef USE_LOCALE_NUMERIC
861 curnum = savepv(setlocale(LC_NUMERIC, NULL));
862 #endif /* USE_LOCALE_NUMERIC */
866 const char * description;
867 const char * name = "";
868 if (strEQ(trial_locales[i], "C")) {
869 description = "the standard locale";
872 #ifdef SYSTEM_DEFAULT_LOCALE
873 else if (strEQ(trial_locales[i], "")) {
874 description = "the system default locale";
875 if (system_default_locale) {
876 name = system_default_locale;
879 #endif /* SYSTEM_DEFAULT_LOCALE */
881 description = "a fallback locale";
882 name = trial_locales[i];
884 if (name && strNE(name, "")) {
885 PerlIO_printf(Perl_error_log,
886 "perl: warning: %s %s (\"%s\").\n", msg, description, name);
889 PerlIO_printf(Perl_error_log,
890 "perl: warning: %s %s.\n", msg, description);
893 } /* End of tried to fallback */
895 #ifdef USE_LOCALE_CTYPE
897 #endif /* USE_LOCALE_CTYPE */
899 #ifdef USE_LOCALE_COLLATE
900 new_collate(curcoll);
901 #endif /* USE_LOCALE_COLLATE */
903 #ifdef USE_LOCALE_NUMERIC
905 #endif /* USE_LOCALE_NUMERIC */
907 #if defined(USE_PERLIO) && defined(USE_LOCALE_CTYPE)
908 /* Set PL_utf8locale to TRUE if using PerlIO _and_ the current LC_CTYPE
909 * locale is UTF-8. If PL_utf8locale and PL_unicode (set by -C or by
910 * $ENV{PERL_UNICODE}) are true, perl.c:S_parse_body() will turn on the
911 * PerlIO :utf8 layer on STDIN, STDOUT, STDERR, _and_ the default open
913 PL_utf8locale = _is_cur_LC_category_utf8(LC_CTYPE);
915 /* Set PL_unicode to $ENV{PERL_UNICODE} if using PerlIO.
916 This is an alternative to using the -C command line switch
917 (the -C if present will override this). */
919 const char *p = PerlEnv_getenv("PERL_UNICODE");
920 PL_unicode = p ? parse_unicode_opts(&p) : 0;
921 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
926 #ifdef USE_LOCALE_CTYPE
928 #endif /* USE_LOCALE_CTYPE */
929 #ifdef USE_LOCALE_COLLATE
931 #endif /* USE_LOCALE_COLLATE */
932 #ifdef USE_LOCALE_NUMERIC
934 #endif /* USE_LOCALE_NUMERIC */
936 #else /* !USE_LOCALE */
937 PERL_UNUSED_ARG(printwarn);
938 #endif /* USE_LOCALE */
944 #ifdef USE_LOCALE_COLLATE
947 * mem_collxfrm() is a bit like strxfrm() but with two important
948 * differences. First, it handles embedded NULs. Second, it allocates
949 * a bit more memory than needed for the transformed data itself.
950 * The real transformed data begins at offset sizeof(collationix).
951 * Please see sv_collxfrm() to see how this is used.
955 Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen)
958 STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
960 PERL_ARGS_ASSERT_MEM_COLLXFRM;
962 /* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
963 /* the +1 is for the terminating NUL. */
965 xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
966 Newx(xbuf, xAlloc, char);
970 *(U32*)xbuf = PL_collation_ix;
971 xout = sizeof(PL_collation_ix);
972 for (xin = 0; xin < len; ) {
976 xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
977 if (xused >= PERL_INT_MAX)
979 if ((STRLEN)xused < xAlloc - xout)
981 xAlloc = (2 * xAlloc) + 1;
982 Renew(xbuf, xAlloc, char);
987 xin += strlen(s + xin) + 1;
990 /* Embedded NULs are understood but silently skipped
991 * because they make no sense in locale collation. */
995 *xlen = xout - sizeof(PL_collation_ix);
1004 #endif /* USE_LOCALE_COLLATE */
1009 Perl__is_cur_LC_category_utf8(pTHX_ int category)
1011 /* Returns TRUE if the current locale for 'category' is UTF-8; FALSE
1012 * otherwise. 'category' may not be LC_ALL. If the platform doesn't have
1013 * nl_langinfo(), nor MB_CUR_MAX, this employs a heuristic, which hence
1014 * could give the wrong result. The result will very likely be correct for
1015 * languages that have commonly used non-ASCII characters, but for notably
1016 * English, it comes down to if the locale's name ends in something like
1017 * "UTF-8". It errs on the side of not being a UTF-8 locale. */
1019 char *save_input_locale = NULL;
1023 assert(category != LC_ALL);
1026 /* First dispose of the trivial cases */
1027 save_input_locale = setlocale(category, NULL);
1028 if (! save_input_locale) {
1029 DEBUG_L(PerlIO_printf(Perl_debug_log,
1030 "Could not find current locale for category %d\n",
1032 return FALSE; /* XXX maybe should croak */
1034 save_input_locale = stdize_locale(savepv(save_input_locale));
1035 if (isNAME_C_OR_POSIX(save_input_locale)) {
1036 DEBUG_L(PerlIO_printf(Perl_debug_log,
1037 "Current locale for category %d is %s\n",
1038 category, save_input_locale));
1039 Safefree(save_input_locale);
1043 #if defined(USE_LOCALE_CTYPE) \
1044 && (defined(MB_CUR_MAX) || (defined(HAS_NL_LANGINFO) && defined(CODESET)))
1046 { /* Next try nl_langinfo or MB_CUR_MAX if available */
1048 char *save_ctype_locale = NULL;
1051 if (category != LC_CTYPE) { /* These work only on LC_CTYPE */
1053 /* Get the current LC_CTYPE locale */
1054 save_ctype_locale = setlocale(LC_CTYPE, NULL);
1055 if (! save_ctype_locale) {
1056 DEBUG_L(PerlIO_printf(Perl_debug_log,
1057 "Could not find current locale for LC_CTYPE\n"));
1058 goto cant_use_nllanginfo;
1060 save_ctype_locale = stdize_locale(savepv(save_ctype_locale));
1062 /* If LC_CTYPE and the desired category use the same locale, this
1063 * means that finding the value for LC_CTYPE is the same as finding
1064 * the value for the desired category. Otherwise, switch LC_CTYPE
1065 * to the desired category's locale */
1066 if (strEQ(save_ctype_locale, save_input_locale)) {
1067 Safefree(save_ctype_locale);
1068 save_ctype_locale = NULL;
1070 else if (! setlocale(LC_CTYPE, save_input_locale)) {
1071 DEBUG_L(PerlIO_printf(Perl_debug_log,
1072 "Could not change LC_CTYPE locale to %s\n",
1073 save_input_locale));
1074 Safefree(save_ctype_locale);
1075 goto cant_use_nllanginfo;
1079 DEBUG_L(PerlIO_printf(Perl_debug_log, "Current LC_CTYPE locale=%s\n",
1080 save_input_locale));
1082 /* Here the current LC_CTYPE is set to the locale of the category whose
1083 * information is desired. This means that nl_langinfo() and MB_CUR_MAX
1084 * should give the correct results */
1086 # if defined(HAS_NL_LANGINFO) && defined(CODESET)
1088 char *codeset = nl_langinfo(CODESET);
1089 if (codeset && strNE(codeset, "")) {
1090 codeset = savepv(codeset);
1092 /* If we switched LC_CTYPE, switch back */
1093 if (save_ctype_locale) {
1094 setlocale(LC_CTYPE, save_ctype_locale);
1095 Safefree(save_ctype_locale);
1098 is_utf8 = foldEQ(codeset, STR_WITH_LEN("UTF-8"))
1099 || foldEQ(codeset, STR_WITH_LEN("UTF8"));
1101 DEBUG_L(PerlIO_printf(Perl_debug_log,
1102 "\tnllanginfo returned CODESET '%s'; ?UTF8 locale=%d\n",
1105 Safefree(save_input_locale);
1113 /* Here, either we don't have nl_langinfo, or it didn't return a
1114 * codeset. Try MB_CUR_MAX */
1116 /* Standard UTF-8 needs at least 4 bytes to represent the maximum
1117 * Unicode code point. Since UTF-8 is the only non-single byte
1118 * encoding we handle, we just say any such encoding is UTF-8, and if
1119 * turns out to be wrong, other things will fail */
1120 is_utf8 = MB_CUR_MAX >= 4;
1122 DEBUG_L(PerlIO_printf(Perl_debug_log,
1123 "\tMB_CUR_MAX=%d; ?UTF8 locale=%d\n",
1124 (int) MB_CUR_MAX, is_utf8));
1126 Safefree(save_input_locale);
1130 /* ... But, most system that have MB_CUR_MAX will also have mbtowc(),
1131 * since they are both in the C99 standard. We can feed a known byte
1132 * string to the latter function, and check that it gives the expected
1136 PERL_UNUSED_RESULT(mbtowc(&wc, NULL, 0));/* Reset any shift state */
1138 if ((size_t)mbtowc(&wc, HYPHEN_UTF8, strlen(HYPHEN_UTF8))
1139 != strlen(HYPHEN_UTF8)
1140 || wc != (wchar_t) 0x2010)
1143 DEBUG_L(PerlIO_printf(Perl_debug_log, "\thyphen=U+%x\n", wc));
1144 DEBUG_L(PerlIO_printf(Perl_debug_log,
1145 "\treturn from mbtowc=%d; errno=%d; ?UTF8 locale=0\n",
1146 mbtowc(&wc, HYPHEN_UTF8, strlen(HYPHEN_UTF8)), errno));
1151 /* If we switched LC_CTYPE, switch back */
1152 if (save_ctype_locale) {
1153 setlocale(LC_CTYPE, save_ctype_locale);
1154 Safefree(save_ctype_locale);
1161 cant_use_nllanginfo:
1163 #else /* nl_langinfo should work if available, so don't bother compiling this
1164 fallback code. The final fallback of looking at the name is
1165 compiled, and will be executed if nl_langinfo fails */
1167 /* nl_langinfo not available or failed somehow. Next try looking at the
1168 * currency symbol to see if it disambiguates things. Often that will be
1169 * in the native script, and if the symbol isn't in UTF-8, we know that the
1170 * locale isn't. If it is non-ASCII UTF-8, we infer that the locale is
1171 * too, as the odds of a non-UTF8 string being valid UTF-8 are quite small
1174 #ifdef HAS_LOCALECONV
1175 # ifdef USE_LOCALE_MONETARY
1177 char *save_monetary_locale = NULL;
1178 bool only_ascii = FALSE;
1179 bool is_utf8 = FALSE;
1182 /* Like above for LC_CTYPE, we first set LC_MONETARY to the locale of
1183 * the desired category, if it isn't that locale already */
1185 if (category != LC_MONETARY) {
1187 save_monetary_locale = setlocale(LC_MONETARY, NULL);
1188 if (! save_monetary_locale) {
1189 DEBUG_L(PerlIO_printf(Perl_debug_log,
1190 "Could not find current locale for LC_MONETARY\n"));
1191 goto cant_use_monetary;
1193 save_monetary_locale = stdize_locale(savepv(save_monetary_locale));
1195 if (strEQ(save_monetary_locale, save_input_locale)) {
1196 Safefree(save_monetary_locale);
1197 save_monetary_locale = NULL;
1199 else if (! setlocale(LC_MONETARY, save_input_locale)) {
1200 DEBUG_L(PerlIO_printf(Perl_debug_log,
1201 "Could not change LC_MONETARY locale to %s\n",
1202 save_input_locale));
1203 Safefree(save_monetary_locale);
1204 goto cant_use_monetary;
1208 /* Here the current LC_MONETARY is set to the locale of the category
1209 * whose information is desired. */
1213 || ! lc->currency_symbol
1214 || is_ascii_string((U8 *) lc->currency_symbol, 0))
1216 DEBUG_L(PerlIO_printf(Perl_debug_log, "Couldn't get currency symbol for %s, or contains only ASCII; can't use for determining if UTF-8 locale\n", save_input_locale));
1220 is_utf8 = is_utf8_string((U8 *) lc->currency_symbol, 0);
1223 /* If we changed it, restore LC_MONETARY to its original locale */
1224 if (save_monetary_locale) {
1225 setlocale(LC_MONETARY, save_monetary_locale);
1226 Safefree(save_monetary_locale);
1231 /* It isn't a UTF-8 locale if the symbol is not legal UTF-8;
1232 * otherwise assume the locale is UTF-8 if and only if the symbol
1233 * is non-ascii UTF-8. */
1234 DEBUG_L(PerlIO_printf(Perl_debug_log, "\t?Currency symbol for %s is UTF-8=%d\n",
1235 save_input_locale, is_utf8));
1236 Safefree(save_input_locale);
1242 # endif /* USE_LOCALE_MONETARY */
1243 #endif /* HAS_LOCALECONV */
1245 #if defined(HAS_STRFTIME) && defined(USE_LOCALE_TIME)
1247 /* Still haven't found a non-ASCII string to disambiguate UTF-8 or not. Try
1248 * the names of the months and weekdays, timezone, and am/pm indicator */
1250 char *save_time_locale = NULL;
1252 bool is_dst = FALSE;
1256 char * formatted_time;
1259 /* Like above for LC_MONETARY, we set LC_TIME to the locale of the
1260 * desired category, if it isn't that locale already */
1262 if (category != LC_TIME) {
1264 save_time_locale = setlocale(LC_TIME, NULL);
1265 if (! save_time_locale) {
1266 DEBUG_L(PerlIO_printf(Perl_debug_log,
1267 "Could not find current locale for LC_TIME\n"));
1270 save_time_locale = stdize_locale(savepv(save_time_locale));
1272 if (strEQ(save_time_locale, save_input_locale)) {
1273 Safefree(save_time_locale);
1274 save_time_locale = NULL;
1276 else if (! setlocale(LC_TIME, save_input_locale)) {
1277 DEBUG_L(PerlIO_printf(Perl_debug_log,
1278 "Could not change LC_TIME locale to %s\n",
1279 save_input_locale));
1280 Safefree(save_time_locale);
1285 /* Here the current LC_TIME is set to the locale of the category
1286 * whose information is desired. Look at all the days of the week and
1287 * month names, and the timezone and am/pm indicator for non-ASCII
1288 * characters. The first such a one found will tell us if the locale
1289 * is UTF-8 or not */
1291 for (i = 0; i < 7 + 12; i++) { /* 7 days; 12 months */
1292 formatted_time = my_strftime("%A %B %Z %p",
1293 0, 0, hour, dom, month, 112, 0, 0, is_dst);
1294 if (! formatted_time || is_ascii_string((U8 *) formatted_time, 0)) {
1296 /* Here, we didn't find a non-ASCII. Try the next time through
1297 * with the complemented dst and am/pm, and try with the next
1298 * weekday. After we have gotten all weekdays, try the next
1301 hour = (hour + 12) % 24;
1309 /* Here, we have a non-ASCII. Return TRUE is it is valid UTF8;
1310 * false otherwise. But first, restore LC_TIME to its original
1311 * locale if we changed it */
1312 if (save_time_locale) {
1313 setlocale(LC_TIME, save_time_locale);
1314 Safefree(save_time_locale);
1317 DEBUG_L(PerlIO_printf(Perl_debug_log, "\t?time-related strings for %s are UTF-8=%d\n",
1319 is_utf8_string((U8 *) formatted_time, 0)));
1320 Safefree(save_input_locale);
1321 return is_utf8_string((U8 *) formatted_time, 0);
1324 /* Falling off the end of the loop indicates all the names were just
1325 * ASCII. Go on to the next test. If we changed it, restore LC_TIME
1326 * to its original locale */
1327 if (save_time_locale) {
1328 setlocale(LC_TIME, save_time_locale);
1329 Safefree(save_time_locale);
1331 DEBUG_L(PerlIO_printf(Perl_debug_log, "All time-related words for %s contain only ASCII; can't use for determining if UTF-8 locale\n", save_input_locale));
1337 #if 0 && defined(USE_LOCALE_MESSAGES) && defined(HAS_SYS_ERRLIST)
1339 /* This code is ifdefd out because it was found to not be necessary in testing
1340 * on our dromedary test machine, which has over 700 locales. There, this
1341 * added no value to looking at the currency symbol and the time strings. I
1342 * left it in so as to avoid rewriting it if real-world experience indicates
1343 * that dromedary is an outlier. Essentially, instead of returning abpve if we
1344 * haven't found illegal utf8, we continue on and examine all the strerror()
1345 * messages on the platform for utf8ness. If all are ASCII, we still don't
1346 * know the answer; but otherwise we have a pretty good indication of the
1347 * utf8ness. The reason this doesn't help much is that the messages may not
1348 * have been translated into the locale. The currency symbol and time strings
1349 * are much more likely to have been translated. */
1352 bool is_utf8 = FALSE;
1353 bool non_ascii = FALSE;
1354 char *save_messages_locale = NULL;
1355 const char * errmsg = NULL;
1357 /* Like above, we set LC_MESSAGES to the locale of the desired
1358 * category, if it isn't that locale already */
1360 if (category != LC_MESSAGES) {
1362 save_messages_locale = setlocale(LC_MESSAGES, NULL);
1363 if (! save_messages_locale) {
1364 DEBUG_L(PerlIO_printf(Perl_debug_log,
1365 "Could not find current locale for LC_MESSAGES\n"));
1366 goto cant_use_messages;
1368 save_messages_locale = stdize_locale(savepv(save_messages_locale));
1370 if (strEQ(save_messages_locale, save_input_locale)) {
1371 Safefree(save_messages_locale);
1372 save_messages_locale = NULL;
1374 else if (! setlocale(LC_MESSAGES, save_input_locale)) {
1375 DEBUG_L(PerlIO_printf(Perl_debug_log,
1376 "Could not change LC_MESSAGES locale to %s\n",
1377 save_input_locale));
1378 Safefree(save_messages_locale);
1379 goto cant_use_messages;
1383 /* Here the current LC_MESSAGES is set to the locale of the category
1384 * whose information is desired. Look through all the messages. We
1385 * can't use Strerror() here because it may expand to code that
1386 * segfaults in miniperl */
1388 for (e = 0; e <= sys_nerr; e++) {
1390 errmsg = sys_errlist[e];
1391 if (errno || !errmsg) {
1394 errmsg = savepv(errmsg);
1395 if (! is_ascii_string((U8 *) errmsg, 0)) {
1397 is_utf8 = is_utf8_string((U8 *) errmsg, 0);
1403 /* And, if we changed it, restore LC_MESSAGES to its original locale */
1404 if (save_messages_locale) {
1405 setlocale(LC_MESSAGES, save_messages_locale);
1406 Safefree(save_messages_locale);
1411 /* Any non-UTF-8 message means not a UTF-8 locale; if all are valid,
1412 * any non-ascii means it is one; otherwise we assume it isn't */
1413 DEBUG_L(PerlIO_printf(Perl_debug_log, "\t?error messages for %s are UTF-8=%d\n",
1416 Safefree(save_input_locale);
1420 DEBUG_L(PerlIO_printf(Perl_debug_log, "All error messages for %s contain only ASCII; can't use for determining if UTF-8 locale\n", save_input_locale));
1426 #endif /* the code that is compiled when no nl_langinfo */
1428 /* As a last resort, look at the locale name to see if it matches
1429 * qr/UTF -? * 8 /ix, or some other common locale names. This "name", the
1430 * return of setlocale(), is actually defined to be opaque, so we can't
1431 * really rely on the absence of various substrings in the name to indicate
1432 * its UTF-8ness, but if it has UTF8 in the name, it is extremely likely to
1433 * be a UTF-8 locale. Similarly for the other common names */
1435 final_pos = strlen(save_input_locale) - 1;
1436 if (final_pos >= 3) {
1437 char *name = save_input_locale;
1439 /* Find next 'U' or 'u' and look from there */
1440 while ((name += strcspn(name, "Uu") + 1)
1441 <= save_input_locale + final_pos - 2)
1443 if (!isALPHA_FOLD_NE(*name, 't')
1444 || isALPHA_FOLD_NE(*(name + 1), 'f'))
1449 if (*(name) == '-') {
1450 if ((name > save_input_locale + final_pos - 1)) {
1455 if (*(name) == '8') {
1456 DEBUG_L(PerlIO_printf(Perl_debug_log,
1457 "Locale %s ends with UTF-8 in name\n",
1458 save_input_locale));
1459 Safefree(save_input_locale);
1463 DEBUG_L(PerlIO_printf(Perl_debug_log,
1464 "Locale %s doesn't end with UTF-8 in name\n",
1465 save_input_locale));
1469 /* http://msdn.microsoft.com/en-us/library/windows/desktop/dd317756.aspx */
1471 && *(save_input_locale + final_pos - 0) == '1'
1472 && *(save_input_locale + final_pos - 1) == '0'
1473 && *(save_input_locale + final_pos - 2) == '0'
1474 && *(save_input_locale + final_pos - 3) == '5'
1475 && *(save_input_locale + final_pos - 4) == '6')
1477 DEBUG_L(PerlIO_printf(Perl_debug_log,
1478 "Locale %s ends with 10056 in name, is UTF-8 locale\n",
1479 save_input_locale));
1480 Safefree(save_input_locale);
1485 /* Other common encodings are the ISO 8859 series, which aren't UTF-8. But
1486 * since we are about to return FALSE anyway, there is no point in doing
1487 * this extra work */
1489 if (instr(save_input_locale, "8859")) {
1490 DEBUG_L(PerlIO_printf(Perl_debug_log,
1491 "Locale %s has 8859 in name, not UTF-8 locale\n",
1492 save_input_locale));
1493 Safefree(save_input_locale);
1498 DEBUG_L(PerlIO_printf(Perl_debug_log,
1499 "Assuming locale %s is not a UTF-8 locale\n",
1500 save_input_locale));
1501 Safefree(save_input_locale);
1509 Perl__is_in_locale_category(pTHX_ const bool compiling, const int category)
1512 /* Internal function which returns if we are in the scope of a pragma that
1513 * enables the locale category 'category'. 'compiling' should indicate if
1514 * this is during the compilation phase (TRUE) or not (FALSE). */
1516 const COP * const cop = (compiling) ? &PL_compiling : PL_curcop;
1518 SV *categories = cop_hints_fetch_pvs(cop, "locale", 0);
1519 if (! categories || categories == &PL_sv_placeholder) {
1523 /* The pseudo-category 'not_characters' is -1, so just add 1 to each to get
1524 * a valid unsigned */
1525 assert(category >= -1);
1526 return cBOOL(SvUV(categories) & (1U << (category + 1)));
1530 Perl_my_strerror(pTHX_ const int errnum) {
1532 /* Uses C locale for the error text unless within scope of 'use locale' for
1535 #ifdef USE_LOCALE_MESSAGES
1536 if (! IN_LC(LC_MESSAGES)) {
1537 char * save_locale = setlocale(LC_MESSAGES, NULL);
1538 if (! isNAME_C_OR_POSIX(save_locale)) {
1541 /* The next setlocale likely will zap this, so create a copy */
1542 save_locale = savepv(save_locale);
1544 setlocale(LC_MESSAGES, "C");
1546 /* This points to the static space in Strerror, with all its
1548 errstr = Strerror(errnum);
1550 setlocale(LC_MESSAGES, save_locale);
1551 Safefree(save_locale);
1557 return Strerror(errnum);
1562 =head1 Locale-related functions and macros
1564 =for apidoc sync_locale
1566 Changing the program's locale should be avoided by XS code. Nevertheless,
1567 certain non-Perl libraries called from XS, such as C<Gtk> do so. When this
1568 happens, Perl needs to be told that the locale has changed. Use this function
1569 to do so, before returning to Perl.
1575 Perl_sync_locale(pTHX)
1578 #ifdef USE_LOCALE_CTYPE
1579 new_ctype(setlocale(LC_CTYPE, NULL));
1580 #endif /* USE_LOCALE_CTYPE */
1582 #ifdef USE_LOCALE_COLLATE
1583 new_collate(setlocale(LC_COLLATE, NULL));
1586 #ifdef USE_LOCALE_NUMERIC
1587 set_numeric_local(); /* Switch from "C" to underlying LC_NUMERIC */
1588 new_numeric(setlocale(LC_NUMERIC, NULL));
1589 #endif /* USE_LOCALE_NUMERIC */
1597 * c-indentation-style: bsd
1599 * indent-tabs-mode: nil
1602 * ex: set ts=8 sts=4 sw=4 et: