This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
perldata: Fix too long verbatim lines
[perl5.git] / locale.c
CommitLineData
98994639
HS
1/* locale.c
2 *
1129b882
NC
3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 * 2002, 2003, 2005, 2006, 2007, 2008 by Larry Wall and others
98994639
HS
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
4ac71550 12 * A Elbereth Gilthoniel,
cdad3b53 13 * silivren penna míriel
4ac71550 14 * o menel aglar elenath!
cdad3b53 15 * Na-chaered palan-díriel
4ac71550
TC
16 * o galadhremmin ennorath,
17 * Fanuilos, le linnathon
18 * nef aear, si nef aearon!
19 *
20 * [p.238 of _The Lord of the Rings_, II/i: "Many Meetings"]
98994639
HS
21 */
22
166f8a29
DM
23/* utility functions for handling locale-specific stuff like what
24 * character represents the decimal point.
0d071d52
KW
25 *
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.
166f8a29
DM
33 */
34
98994639
HS
35#include "EXTERN.h"
36#define PERL_IN_LOCALE_C
37#include "perl.h"
38
b310b053
JH
39#ifdef I_LANGINFO
40# include <langinfo.h>
41#endif
42
a4af207c
JH
43#include "reentr.h"
44
8ef6e574
KW
45#ifdef USE_LOCALE
46
98994639 47/*
0d071d52
KW
48 * Standardize the locale name from a string returned by 'setlocale', possibly
49 * modifying that string.
98994639 50 *
0ef2a2b2 51 * The typical return value of setlocale() is either
98994639
HS
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,
0ef2a2b2 55 * in some unspecified order). This is not handled by this function.
98994639
HS
56 *
57 * In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n",
0ef2a2b2
KW
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 '='
98994639
HS
60 *
61 */
62STATIC char *
63S_stdize_locale(pTHX_ char *locs)
64{
7452cf6a 65 const char * const s = strchr(locs, '=');
98994639
HS
66 bool okay = TRUE;
67
7918f24d
NC
68 PERL_ARGS_ASSERT_STDIZE_LOCALE;
69
8772537c
AL
70 if (s) {
71 const char * const t = strchr(s, '.');
98994639 72 okay = FALSE;
8772537c
AL
73 if (t) {
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);
78 locs[len] = 0;
79 okay = TRUE;
98994639
HS
80 }
81 }
82 }
83
84 if (!okay)
85 Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs);
86
87 return locs;
88}
89
8ef6e574
KW
90#endif
91
98994639
HS
92void
93Perl_set_numeric_radix(pTHX)
94{
95#ifdef USE_LOCALE_NUMERIC
96# ifdef HAS_LOCALECONV
7452cf6a 97 const struct lconv* const lc = localeconv();
98994639 98
98994639
HS
99 if (lc && lc->decimal_point) {
100 if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) {
101 SvREFCNT_dec(PL_numeric_radix_sv);
a0714e2c 102 PL_numeric_radix_sv = NULL;
98994639
HS
103 }
104 else {
105 if (PL_numeric_radix_sv)
106 sv_setpv(PL_numeric_radix_sv, lc->decimal_point);
107 else
108 PL_numeric_radix_sv = newSVpv(lc->decimal_point, 0);
28acfe03
KW
109 if (! is_ascii_string((U8 *) lc->decimal_point, 0)
110 && is_utf8_string((U8 *) lc->decimal_point, 0)
c1284011 111 && _is_cur_LC_category_utf8(LC_NUMERIC))
28acfe03
KW
112 {
113 SvUTF8_on(PL_numeric_radix_sv);
114 }
98994639
HS
115 }
116 }
117 else
a0714e2c 118 PL_numeric_radix_sv = NULL;
69014004
KW
119
120 DEBUG_L(PerlIO_printf(Perl_debug_log, "Locale radix is %s\n",
121 (PL_numeric_radix_sv)
122 ? lc->decimal_point
123 : "NULL"));
124
98994639
HS
125# endif /* HAS_LOCALECONV */
126#endif /* USE_LOCALE_NUMERIC */
127}
128
a39edc4c
KW
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 */
98b630b3
KW
139#define isNAME_C_OR_POSIX(name) ((name) != NULL \
140 && ((*(name) == 'C' && (*(name + 1)) == '\0') \
a39edc4c
KW
141 || strEQ((name), "POSIX")))
142
98994639 143void
8772537c 144Perl_new_numeric(pTHX_ const char *newnum)
98994639
HS
145{
146#ifdef USE_LOCALE_NUMERIC
0d071d52
KW
147
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.
151 *
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.
156 *
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
159 * dot.
160 *
161 * This sets several interpreter-level variables:
bb304765 162 * PL_numeric_name The underlying locale's name: a copy of 'newnum'
0d071d52 163 * PL_numeric_local A boolean indicating if the toggled state is such
7738054c
KW
164 * that the current locale is the program's underlying
165 * locale
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
169 * from C.
0d071d52
KW
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
172 * circumstances.)
173 *
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() */
178
b03f34cf 179 char *save_newnum;
98994639
HS
180
181 if (! newnum) {
43c5f42d
NC
182 Safefree(PL_numeric_name);
183 PL_numeric_name = NULL;
98994639
HS
184 PL_numeric_standard = TRUE;
185 PL_numeric_local = TRUE;
186 return;
187 }
188
b03f34cf
KW
189 save_newnum = stdize_locale(savepv(newnum));
190 if (! PL_numeric_name || strNE(PL_numeric_name, save_newnum)) {
98994639 191 Safefree(PL_numeric_name);
b03f34cf 192 PL_numeric_name = save_newnum;
b03f34cf 193 }
98994639 194
a39edc4c 195 PL_numeric_standard = isNAME_C_OR_POSIX(save_newnum);
e19f01cb 196 PL_numeric_local = TRUE;
4c28b29c
KW
197
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();
202
e19f01cb 203 set_numeric_radix();
6959d69d 204
f2ce9e1c
JH
205#else
206 PERL_UNUSED_ARG(newnum);
98994639
HS
207#endif /* USE_LOCALE_NUMERIC */
208}
209
210void
211Perl_set_numeric_standard(pTHX)
212{
213#ifdef USE_LOCALE_NUMERIC
28c1bf33
KW
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) */
0d071d52 219
a9b8c0d8
KW
220 setlocale(LC_NUMERIC, "C");
221 PL_numeric_standard = TRUE;
222 PL_numeric_local = isNAME_C_OR_POSIX(PL_numeric_name);
223 set_numeric_radix();
69014004
KW
224 DEBUG_L(PerlIO_printf(Perl_debug_log,
225 "Underlying LC_NUMERIC locale now is C\n"));
98994639
HS
226
227#endif /* USE_LOCALE_NUMERIC */
228}
229
230void
231Perl_set_numeric_local(pTHX)
232{
233#ifdef USE_LOCALE_NUMERIC
28c1bf33
KW
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) */
a9b8c0d8
KW
239
240 setlocale(LC_NUMERIC, PL_numeric_name);
241 PL_numeric_standard = isNAME_C_OR_POSIX(PL_numeric_name);
242 PL_numeric_local = TRUE;
243 set_numeric_radix();
69014004
KW
244 DEBUG_L(PerlIO_printf(Perl_debug_log,
245 "Underlying LC_NUMERIC locale now is %s\n",
246 PL_numeric_name));
98994639
HS
247
248#endif /* USE_LOCALE_NUMERIC */
249}
250
251/*
252 * Set up for a new ctype locale.
253 */
254void
8772537c 255Perl_new_ctype(pTHX_ const char *newctype)
98994639
HS
256{
257#ifdef USE_LOCALE_CTYPE
0d071d52
KW
258
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.
261 *
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,
264 *
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() */
269
27da23d5 270 dVAR;
68067e4e 271 UV i;
98994639 272
7918f24d
NC
273 PERL_ARGS_ASSERT_NEW_CTYPE;
274
c1284011 275 PL_in_utf8_CTYPE_locale = _is_cur_LC_category_utf8(LC_CTYPE);
31f05a37
KW
276
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);
281 }
282 else {
baa60164
KW
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);
288 else
289 PL_fold_locale[i] = (U8) i;
290 }
31f05a37 291 }
98994639
HS
292
293#endif /* USE_LOCALE_CTYPE */
7918f24d 294 PERL_ARGS_ASSERT_NEW_CTYPE;
8772537c 295 PERL_UNUSED_ARG(newctype);
96a5add6 296 PERL_UNUSED_CONTEXT;
98994639
HS
297}
298
98994639 299void
8772537c 300Perl_new_collate(pTHX_ const char *newcoll)
98994639
HS
301{
302#ifdef USE_LOCALE_COLLATE
0d071d52
KW
303
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.
306 *
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() */
311
98994639
HS
312 if (! newcoll) {
313 if (PL_collation_name) {
314 ++PL_collation_ix;
315 Safefree(PL_collation_name);
316 PL_collation_name = NULL;
317 }
318 PL_collation_standard = TRUE;
319 PL_collxfrm_base = 0;
320 PL_collxfrm_mult = 2;
321 return;
322 }
323
324 if (! PL_collation_name || strNE(PL_collation_name, newcoll)) {
325 ++PL_collation_ix;
326 Safefree(PL_collation_name);
327 PL_collation_name = stdize_locale(savepv(newcoll));
a39edc4c 328 PL_collation_standard = isNAME_C_OR_POSIX(newcoll);
98994639
HS
329
330 {
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];
8772537c
AL
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;
e0601d3c 338 if (mult < 1 && !(fa == 0 && fb == 0))
ad49ad39
NC
339 Perl_croak(aTHX_ "panic: strxfrm() gets absurd - a => %"UVuf", ab => %"UVuf,
340 (UV) fa, (UV) fb);
eb160463 341 PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0;
98994639
HS
342 PL_collxfrm_mult = mult;
343 }
344 }
345
f2ce9e1c
JH
346#else
347 PERL_UNUSED_ARG(newcoll);
98994639
HS
348#endif /* USE_LOCALE_COLLATE */
349}
350
b385bb4d
KW
351#ifdef WIN32
352
353char *
354Perl_my_setlocale(pTHX_ int category, const char* locale)
355{
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. */
367
481465ea 368 bool override_LC_ALL = 0;
89f7b9aa
KW
369 char * result;
370
b385bb4d
KW
371 if (locale && strEQ(locale, "")) {
372# ifdef LC_ALL
373 locale = PerlEnv_getenv("LC_ALL");
374 if (! locale) {
375#endif
376 switch (category) {
377# ifdef LC_ALL
378 case LC_ALL:
481465ea 379 override_LC_ALL = TRUE;
b385bb4d
KW
380 break; /* We already know its variable isn't set */
381# endif
382# ifdef USE_LOCALE_TIME
383 case LC_TIME:
384 locale = PerlEnv_getenv("LC_TIME");
385 break;
386# endif
387# ifdef USE_LOCALE_CTYPE
388 case LC_CTYPE:
389 locale = PerlEnv_getenv("LC_CTYPE");
390 break;
391# endif
392# ifdef USE_LOCALE_COLLATE
393 case LC_COLLATE:
394 locale = PerlEnv_getenv("LC_COLLATE");
395 break;
396# endif
397# ifdef USE_LOCALE_MONETARY
398 case LC_MONETARY:
399 locale = PerlEnv_getenv("LC_MONETARY");
400 break;
401# endif
402# ifdef USE_LOCALE_NUMERIC
403 case LC_NUMERIC:
404 locale = PerlEnv_getenv("LC_NUMERIC");
405 break;
406# endif
407# ifdef USE_LOCALE_MESSAGES
408 case LC_MESSAGES:
409 locale = PerlEnv_getenv("LC_MESSAGES");
410 break;
411# endif
412 default:
413 /* This is a category, like PAPER_SIZE that we don't
414 * know about; and so can't provide a wrapper. */
415 break;
416 }
417 if (! locale) {
418 locale = PerlEnv_getenv("LANG");
481465ea 419 if (! locale) {
b385bb4d
KW
420 locale = "";
421 }
422 }
423# ifdef LC_ALL
424 }
425# endif
426 }
427
89f7b9aa
KW
428 result = setlocale(category, locale);
429
481465ea 430 if (! override_LC_ALL) {
89f7b9aa
KW
431 return result;
432 }
433
434 /* Here the input locale was LC_ALL, and we have set it to what is in the
481465ea
KW
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) */
89f7b9aa
KW
439# ifdef USE_LOCALE_TIME
440 result = PerlEnv_getenv("LC_TIME");
730252b2 441 if (result && strNE(result, "")) {
89f7b9aa
KW
442 setlocale(LC_TIME, result);
443 }
444# endif
445# ifdef USE_LOCALE_CTYPE
446 result = PerlEnv_getenv("LC_CTYPE");
730252b2 447 if (result && strNE(result, "")) {
89f7b9aa
KW
448 setlocale(LC_CTYPE, result);
449 }
450# endif
451# ifdef USE_LOCALE_COLLATE
452 result = PerlEnv_getenv("LC_COLLATE");
730252b2 453 if (result && strNE(result, "")) {
89f7b9aa
KW
454 setlocale(LC_COLLATE, result);
455 }
456# endif
457# ifdef USE_LOCALE_MONETARY
458 result = PerlEnv_getenv("LC_MONETARY");
730252b2 459 if (result && strNE(result, "")) {
89f7b9aa
KW
460 setlocale(LC_MONETARY, result);
461 }
462# endif
463# ifdef USE_LOCALE_NUMERIC
464 result = PerlEnv_getenv("LC_NUMERIC");
730252b2 465 if (result && strNE(result, "")) {
89f7b9aa
KW
466 setlocale(LC_NUMERIC, result);
467 }
468# endif
469# ifdef USE_LOCALE_MESSAGES
470 result = PerlEnv_getenv("LC_MESSAGES");
730252b2 471 if (result && strNE(result, "")) {
89f7b9aa
KW
472 setlocale(LC_MESSAGES, result);
473 }
474# endif
475
476 return setlocale(LC_ALL, NULL);
477
b385bb4d
KW
478}
479
480#endif
481
482
98994639
HS
483/*
484 * Initialize locale awareness.
485 */
486int
487Perl_init_i18nl10n(pTHX_ int printwarn)
488{
0e92a118
KW
489 /* printwarn is
490 *
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
494 *
495 * returns
98994639 496 * 1 = set ok or not applicable,
0e92a118
KW
497 * 0 = fallback to a locale of lower priority
498 * -1 = fallback to all locales failed, not even to the C locale
98994639
HS
499 */
500
0e92a118
KW
501 int ok = 1;
502
98994639 503#if defined(USE_LOCALE)
98994639
HS
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
511 char *curnum = NULL;
512#endif /* USE_LOCALE_NUMERIC */
513#ifdef __GLIBC__
7452cf6a 514 char * const language = PerlEnv_getenv("LANGUAGE");
98994639 515#endif
65ebb059 516
ccd65d51
KW
517 /* NULL uses the existing already set up locale */
518 const char * const setlocale_init = (PerlEnv_getenv("PERL_SKIP_LOCALE_INIT"))
519 ? NULL
520 : "";
c3fcd832
KW
521 const char* trial_locales[5]; /* 5 = 1 each for "", LC_ALL, LANG, "", C */
522 unsigned int trial_locales_count;
7452cf6a
AL
523 char * const lc_all = PerlEnv_getenv("LC_ALL");
524 char * const lang = PerlEnv_getenv("LANG");
98994639 525 bool setlocale_failure = FALSE;
65ebb059
KW
526 unsigned int i;
527 char *p;
528 const bool locwarn = (printwarn > 1 ||
529 (printwarn &&
96e440d2
JH
530 (!(p = PerlEnv_getenv("PERL_BADLANG")) ||
531 grok_atou(p, NULL))));
0e92a118 532 bool done = FALSE;
6bce99ee
JH
533#ifdef WIN32
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
537#endif
538#ifdef SYSTEM_DEFAULT_LOCALE
65ebb059 539 const char *system_default_locale = NULL;
6bce99ee 540#endif
98994639 541
0e92a118
KW
542#ifndef LOCALE_ENVIRON_REQUIRED
543 PERL_UNUSED_VAR(done);
544#else
98994639
HS
545
546 /*
547 * Ultrix setlocale(..., "") fails if there are no environment
548 * variables from which to get a locale name.
549 */
550
b3e384bf 551# ifdef LC_ALL
98994639 552 if (lang) {
b385bb4d 553 if (my_setlocale(LC_ALL, setlocale_init))
98994639
HS
554 done = TRUE;
555 else
556 setlocale_failure = TRUE;
557 }
558 if (!setlocale_failure) {
b3e384bf 559# ifdef USE_LOCALE_CTYPE
56279a21 560 Safefree(curctype);
98994639 561 if (! (curctype =
b385bb4d 562 my_setlocale(LC_CTYPE,
98994639 563 (!done && (lang || PerlEnv_getenv("LC_CTYPE")))
ccd65d51 564 ? setlocale_init : NULL)))
98994639
HS
565 setlocale_failure = TRUE;
566 else
567 curctype = savepv(curctype);
b3e384bf
KW
568# endif /* USE_LOCALE_CTYPE */
569# ifdef USE_LOCALE_COLLATE
56279a21 570 Safefree(curcoll);
98994639 571 if (! (curcoll =
b385bb4d 572 my_setlocale(LC_COLLATE,
98994639 573 (!done && (lang || PerlEnv_getenv("LC_COLLATE")))
ccd65d51 574 ? setlocale_init : NULL)))
98994639
HS
575 setlocale_failure = TRUE;
576 else
577 curcoll = savepv(curcoll);
b3e384bf
KW
578# endif /* USE_LOCALE_COLLATE */
579# ifdef USE_LOCALE_NUMERIC
56279a21 580 Safefree(curnum);
98994639 581 if (! (curnum =
b385bb4d 582 my_setlocale(LC_NUMERIC,
98994639 583 (!done && (lang || PerlEnv_getenv("LC_NUMERIC")))
ccd65d51 584 ? setlocale_init : NULL)))
98994639
HS
585 setlocale_failure = TRUE;
586 else
587 curnum = savepv(curnum);
b3e384bf 588# endif /* USE_LOCALE_NUMERIC */
a782673d
KW
589# ifdef USE_LOCALE_MESSAGES
590 if (! my_setlocale(LC_MESSAGES,
591 (!done && (lang || PerlEnv_getenv("LC_MESSAGES")))
592 ? setlocale_init : NULL))
593 {
594 setlocale_failure = TRUE;
595 }
596# endif /* USE_LOCALE_MESSAGES */
c835d6be
KW
597# ifdef USE_LOCALE_MONETARY
598 if (! my_setlocale(LC_MONETARY,
599 (!done && (lang || PerlEnv_getenv("LC_MONETARY")))
600 ? setlocale_init : NULL))
601 {
602 setlocale_failure = TRUE;
603 }
604# endif /* USE_LOCALE_MONETARY */
98994639
HS
605 }
606
b3e384bf 607# endif /* LC_ALL */
98994639
HS
608
609#endif /* !LOCALE_ENVIRON_REQUIRED */
610
65ebb059
KW
611 /* We try each locale in the list until we get one that works, or exhaust
612 * the list */
c3fcd832
KW
613 trial_locales[0] = setlocale_init;
614 trial_locales_count = 1;
65ebb059
KW
615 for (i= 0; i < trial_locales_count; i++) {
616 const char * trial_locale = trial_locales[i];
617
618 if (i > 0) {
619
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
622 * sense */
623 setlocale_failure = FALSE;
624
6bce99ee
JH
625#ifdef SYSTEM_DEFAULT_LOCALE
626# ifdef WIN32
65ebb059
KW
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, "")) {
630 unsigned int j;
631
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, "");
635
636 /* Skip if invalid or it's already on the list of locales to
637 * try */
638 if (! system_default_locale) {
639 goto next_iteration;
640 }
641 for (j = 0; j < trial_locales_count; j++) {
642 if (strEQ(system_default_locale, trial_locales[j])) {
643 goto next_iteration;
644 }
645 }
646
647 trial_locale = system_default_locale;
648 }
6bce99ee
JH
649# endif /* WIN32 */
650#endif /* SYSTEM_DEFAULT_LOCALE */
65ebb059
KW
651 }
652
98994639 653#ifdef LC_ALL
7cd8b568 654 if (! my_setlocale(LC_ALL, trial_locale)) {
49c85077 655 setlocale_failure = TRUE;
7cd8b568
KW
656 }
657 else {
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. */
665 trial_locale = NULL;
666 }
98994639
HS
667#endif /* LC_ALL */
668
49c85077 669 if (!setlocale_failure) {
98994639 670#ifdef USE_LOCALE_CTYPE
49c85077
KW
671 Safefree(curctype);
672 if (! (curctype = my_setlocale(LC_CTYPE, trial_locale)))
673 setlocale_failure = TRUE;
674 else
675 curctype = savepv(curctype);
98994639
HS
676#endif /* USE_LOCALE_CTYPE */
677#ifdef USE_LOCALE_COLLATE
49c85077
KW
678 Safefree(curcoll);
679 if (! (curcoll = my_setlocale(LC_COLLATE, trial_locale)))
680 setlocale_failure = TRUE;
681 else
682 curcoll = savepv(curcoll);
98994639
HS
683#endif /* USE_LOCALE_COLLATE */
684#ifdef USE_LOCALE_NUMERIC
49c85077
KW
685 Safefree(curnum);
686 if (! (curnum = my_setlocale(LC_NUMERIC, trial_locale)))
687 setlocale_failure = TRUE;
688 else
689 curnum = savepv(curnum);
98994639 690#endif /* USE_LOCALE_NUMERIC */
a782673d
KW
691#ifdef USE_LOCALE_MESSAGES
692 if (! (my_setlocale(LC_MESSAGES, trial_locale)))
693 setlocale_failure = TRUE;
694#endif /* USE_LOCALE_MESSAGES */
c835d6be
KW
695#ifdef USE_LOCALE_MONETARY
696 if (! (my_setlocale(LC_MONETARY, trial_locale)))
697 setlocale_failure = TRUE;
698#endif /* USE_LOCALE_MONETARY */
699
49c85077
KW
700 if (! setlocale_failure) { /* Success */
701 break;
702 }
65ebb059 703 }
98994639 704
49c85077
KW
705 /* Here, something failed; will need to try a fallback. */
706 ok = 0;
65ebb059 707
49c85077
KW
708 if (i == 0) {
709 unsigned int j;
98994639 710
65ebb059 711 if (locwarn) { /* Output failure info only on the first one */
98994639
HS
712#ifdef LC_ALL
713
49c85077
KW
714 PerlIO_printf(Perl_error_log,
715 "perl: warning: Setting locale failed.\n");
98994639
HS
716
717#else /* !LC_ALL */
718
49c85077
KW
719 PerlIO_printf(Perl_error_log,
720 "perl: warning: Setting locale failed for the categories:\n\t");
98994639 721#ifdef USE_LOCALE_CTYPE
49c85077
KW
722 if (! curctype)
723 PerlIO_printf(Perl_error_log, "LC_CTYPE ");
98994639
HS
724#endif /* USE_LOCALE_CTYPE */
725#ifdef USE_LOCALE_COLLATE
49c85077
KW
726 if (! curcoll)
727 PerlIO_printf(Perl_error_log, "LC_COLLATE ");
98994639
HS
728#endif /* USE_LOCALE_COLLATE */
729#ifdef USE_LOCALE_NUMERIC
49c85077
KW
730 if (! curnum)
731 PerlIO_printf(Perl_error_log, "LC_NUMERIC ");
98994639 732#endif /* USE_LOCALE_NUMERIC */
a782673d 733 PerlIO_printf(Perl_error_log, "and possibly others\n");
98994639
HS
734
735#endif /* LC_ALL */
736
49c85077
KW
737 PerlIO_printf(Perl_error_log,
738 "perl: warning: Please check that your locale settings:\n");
98994639
HS
739
740#ifdef __GLIBC__
49c85077
KW
741 PerlIO_printf(Perl_error_log,
742 "\tLANGUAGE = %c%s%c,\n",
743 language ? '"' : '(',
744 language ? language : "unset",
745 language ? '"' : ')');
98994639
HS
746#endif
747
49c85077
KW
748 PerlIO_printf(Perl_error_log,
749 "\tLC_ALL = %c%s%c,\n",
750 lc_all ? '"' : '(',
751 lc_all ? lc_all : "unset",
752 lc_all ? '"' : ')');
98994639
HS
753
754#if defined(USE_ENVIRON_ARRAY)
49c85077
KW
755 {
756 char **e;
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);
763 }
764 }
98994639 765#else
49c85077
KW
766 PerlIO_printf(Perl_error_log,
767 "\t(possibly more locale environment variables)\n");
98994639
HS
768#endif
769
49c85077
KW
770 PerlIO_printf(Perl_error_log,
771 "\tLANG = %c%s%c\n",
772 lang ? '"' : '(',
773 lang ? lang : "unset",
774 lang ? '"' : ')');
98994639 775
49c85077
KW
776 PerlIO_printf(Perl_error_log,
777 " are supported and installed on your system.\n");
778 }
98994639 779
65ebb059
KW
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.
783 *
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 */
790 if (lc_all) {
791 for (j = 0; j < trial_locales_count; j++) {
792 if (strEQ(lc_all, trial_locales[j])) {
793 goto done_lc_all;
794 }
795 }
796 trial_locales[trial_locales_count++] = lc_all;
797 }
798 done_lc_all:
98994639 799
65ebb059
KW
800 if (lang) {
801 for (j = 0; j < trial_locales_count; j++) {
802 if (strEQ(lang, trial_locales[j])) {
803 goto done_lang;
804 }
805 }
806 trial_locales[trial_locales_count++] = lang;
807 }
808 done_lang:
809
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++] = "";
818#endif
819
820 for (j = 0; j < trial_locales_count; j++) {
821 if (strEQ("C", trial_locales[j])) {
822 goto done_C;
823 }
824 }
825 trial_locales[trial_locales_count++] = "C";
98994639 826
65ebb059
KW
827 done_C: ;
828 } /* end of first time through the loop */
98994639 829
65ebb059
KW
830#ifdef WIN32
831 next_iteration: ;
832#endif
833
834 } /* end of looping through the trial locales */
835
836 if (ok < 1) { /* If we tried to fallback */
837 const char* msg;
838 if (! setlocale_failure) { /* fallback succeeded */
839 msg = "Falling back to";
840 }
841 else { /* fallback failed */
98994639 842
65ebb059
KW
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 */
845 i--;
98994639 846
65ebb059
KW
847 ok = -1;
848 msg = "Failed to fall back to";
849
850 /* To continue, we should use whatever values we've got */
98994639 851#ifdef USE_LOCALE_CTYPE
49c85077
KW
852 Safefree(curctype);
853 curctype = savepv(setlocale(LC_CTYPE, NULL));
98994639
HS
854#endif /* USE_LOCALE_CTYPE */
855#ifdef USE_LOCALE_COLLATE
49c85077
KW
856 Safefree(curcoll);
857 curcoll = savepv(setlocale(LC_COLLATE, NULL));
98994639
HS
858#endif /* USE_LOCALE_COLLATE */
859#ifdef USE_LOCALE_NUMERIC
49c85077
KW
860 Safefree(curnum);
861 curnum = savepv(setlocale(LC_NUMERIC, NULL));
98994639 862#endif /* USE_LOCALE_NUMERIC */
65ebb059
KW
863 }
864
865 if (locwarn) {
866 const char * description;
867 const char * name = "";
868 if (strEQ(trial_locales[i], "C")) {
869 description = "the standard locale";
870 name = "C";
871 }
6bce99ee 872#ifdef SYSTEM_DEFAULT_LOCALE
65ebb059
KW
873 else if (strEQ(trial_locales[i], "")) {
874 description = "the system default locale";
875 if (system_default_locale) {
876 name = system_default_locale;
877 }
878 }
6bce99ee 879#endif /* SYSTEM_DEFAULT_LOCALE */
65ebb059
KW
880 else {
881 description = "a fallback locale";
882 name = trial_locales[i];
883 }
884 if (name && strNE(name, "")) {
885 PerlIO_printf(Perl_error_log,
886 "perl: warning: %s %s (\"%s\").\n", msg, description, name);
887 }
888 else {
889 PerlIO_printf(Perl_error_log,
890 "perl: warning: %s %s.\n", msg, description);
891 }
892 }
893 } /* End of tried to fallback */
98994639
HS
894
895#ifdef USE_LOCALE_CTYPE
896 new_ctype(curctype);
897#endif /* USE_LOCALE_CTYPE */
898
899#ifdef USE_LOCALE_COLLATE
900 new_collate(curcoll);
901#endif /* USE_LOCALE_COLLATE */
902
903#ifdef USE_LOCALE_NUMERIC
904 new_numeric(curnum);
905#endif /* USE_LOCALE_NUMERIC */
b310b053 906
8ef6e574 907#if defined(USE_PERLIO) && defined(USE_LOCALE_CTYPE)
49c85077
KW
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
912 * discipline. */
c1284011 913 PL_utf8locale = _is_cur_LC_category_utf8(LC_CTYPE);
49c85077 914
a05d7ebb 915 /* Set PL_unicode to $ENV{PERL_UNICODE} if using PerlIO.
fde18df1
JH
916 This is an alternative to using the -C command line switch
917 (the -C if present will override this). */
918 {
dd374669 919 const char *p = PerlEnv_getenv("PERL_UNICODE");
a05d7ebb 920 PL_unicode = p ? parse_unicode_opts(&p) : 0;
5a22a2bb
NC
921 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
922 PL_utf8cache = -1;
b310b053 923 }
ec71e770 924#endif
b310b053 925
98994639 926#ifdef USE_LOCALE_CTYPE
43c5f42d 927 Safefree(curctype);
98994639
HS
928#endif /* USE_LOCALE_CTYPE */
929#ifdef USE_LOCALE_COLLATE
43c5f42d 930 Safefree(curcoll);
98994639
HS
931#endif /* USE_LOCALE_COLLATE */
932#ifdef USE_LOCALE_NUMERIC
43c5f42d 933 Safefree(curnum);
98994639 934#endif /* USE_LOCALE_NUMERIC */
8ef6e574 935
f2ce9e1c
JH
936#else /* !USE_LOCALE */
937 PERL_UNUSED_ARG(printwarn);
8ef6e574
KW
938#endif /* USE_LOCALE */
939
98994639
HS
940 return ok;
941}
942
49c85077 943
98994639
HS
944#ifdef USE_LOCALE_COLLATE
945
946/*
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.
952 */
166f8a29 953
98994639
HS
954char *
955Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen)
956{
957 char *xbuf;
958 STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
959
7918f24d
NC
960 PERL_ARGS_ASSERT_MEM_COLLXFRM;
961
98994639
HS
962 /* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
963 /* the +1 is for the terminating NUL. */
964
965 xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
a02a5408 966 Newx(xbuf, xAlloc, char);
98994639
HS
967 if (! xbuf)
968 goto bad;
969
970 *(U32*)xbuf = PL_collation_ix;
971 xout = sizeof(PL_collation_ix);
972 for (xin = 0; xin < len; ) {
224e8ef5 973 Size_t xused;
98994639
HS
974
975 for (;;) {
976 xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
224e8ef5 977 if (xused >= PERL_INT_MAX)
98994639 978 goto bad;
eb160463 979 if ((STRLEN)xused < xAlloc - xout)
98994639
HS
980 break;
981 xAlloc = (2 * xAlloc) + 1;
982 Renew(xbuf, xAlloc, char);
983 if (! xbuf)
984 goto bad;
985 }
986
987 xin += strlen(s + xin) + 1;
988 xout += xused;
989
990 /* Embedded NULs are understood but silently skipped
991 * because they make no sense in locale collation. */
992 }
993
994 xbuf[xout] = '\0';
995 *xlen = xout - sizeof(PL_collation_ix);
996 return xbuf;
997
998 bad:
999 Safefree(xbuf);
1000 *xlen = 0;
1001 return NULL;
1002}
1003
1004#endif /* USE_LOCALE_COLLATE */
1005
8ef6e574
KW
1006#ifdef USE_LOCALE
1007
c1284011
KW
1008bool
1009Perl__is_cur_LC_category_utf8(pTHX_ int category)
7d74bb61
KW
1010{
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
119ee68b 1013 * nl_langinfo(), nor MB_CUR_MAX, this employs a heuristic, which hence
609548d2
KW
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. */
7d74bb61
KW
1018
1019 char *save_input_locale = NULL;
7d74bb61
KW
1020 STRLEN final_pos;
1021
8ef6e574 1022#ifdef LC_ALL
7d74bb61 1023 assert(category != LC_ALL);
8ef6e574 1024#endif
7d74bb61
KW
1025
1026 /* First dispose of the trivial cases */
b07fffd1 1027 save_input_locale = setlocale(category, NULL);
7d74bb61 1028 if (! save_input_locale) {
69014004
KW
1029 DEBUG_L(PerlIO_printf(Perl_debug_log,
1030 "Could not find current locale for category %d\n",
1031 category));
7d74bb61
KW
1032 return FALSE; /* XXX maybe should croak */
1033 }
b07fffd1 1034 save_input_locale = stdize_locale(savepv(save_input_locale));
a39edc4c 1035 if (isNAME_C_OR_POSIX(save_input_locale)) {
69014004
KW
1036 DEBUG_L(PerlIO_printf(Perl_debug_log,
1037 "Current locale for category %d is %s\n",
1038 category, save_input_locale));
b07fffd1 1039 Safefree(save_input_locale);
7d74bb61
KW
1040 return FALSE;
1041 }
1042
1d958db2
KW
1043#if defined(USE_LOCALE_CTYPE) \
1044 && (defined(MB_CUR_MAX) || (defined(HAS_NL_LANGINFO) && defined(CODESET)))
7d74bb61 1045
1d958db2 1046 { /* Next try nl_langinfo or MB_CUR_MAX if available */
7d74bb61
KW
1047
1048 char *save_ctype_locale = NULL;
119ee68b 1049 bool is_utf8;
7d74bb61 1050
119ee68b 1051 if (category != LC_CTYPE) { /* These work only on LC_CTYPE */
7d74bb61
KW
1052
1053 /* Get the current LC_CTYPE locale */
4f72bb37 1054 save_ctype_locale = setlocale(LC_CTYPE, NULL);
7d74bb61 1055 if (! save_ctype_locale) {
69014004
KW
1056 DEBUG_L(PerlIO_printf(Perl_debug_log,
1057 "Could not find current locale for LC_CTYPE\n"));
7d74bb61
KW
1058 goto cant_use_nllanginfo;
1059 }
4f72bb37 1060 save_ctype_locale = stdize_locale(savepv(save_ctype_locale));
7d74bb61
KW
1061
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;
1069 }
1070 else if (! setlocale(LC_CTYPE, save_input_locale)) {
69014004
KW
1071 DEBUG_L(PerlIO_printf(Perl_debug_log,
1072 "Could not change LC_CTYPE locale to %s\n",
1073 save_input_locale));
7d74bb61
KW
1074 Safefree(save_ctype_locale);
1075 goto cant_use_nllanginfo;
1076 }
1077 }
1078
69014004
KW
1079 DEBUG_L(PerlIO_printf(Perl_debug_log, "Current LC_CTYPE locale=%s\n",
1080 save_input_locale));
1081
7d74bb61 1082 /* Here the current LC_CTYPE is set to the locale of the category whose
1d958db2
KW
1083 * information is desired. This means that nl_langinfo() and MB_CUR_MAX
1084 * should give the correct results */
119ee68b 1085
1d958db2
KW
1086# if defined(HAS_NL_LANGINFO) && defined(CODESET)
1087 {
4f72bb37 1088 char *codeset = nl_langinfo(CODESET);
1d958db2 1089 if (codeset && strNE(codeset, "")) {
4f72bb37 1090 codeset = savepv(codeset);
119ee68b 1091
1d958db2
KW
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);
1096 }
1097
1098 is_utf8 = foldEQ(codeset, STR_WITH_LEN("UTF-8"))
1099 || foldEQ(codeset, STR_WITH_LEN("UTF8"));
1100
69014004
KW
1101 DEBUG_L(PerlIO_printf(Perl_debug_log,
1102 "\tnllanginfo returned CODESET '%s'; ?UTF8 locale=%d\n",
1103 codeset, is_utf8));
1d958db2
KW
1104 Safefree(codeset);
1105 Safefree(save_input_locale);
1106 return is_utf8;
1107 }
119ee68b
KW
1108 }
1109
1d958db2
KW
1110# endif
1111# ifdef MB_CUR_MAX
1112
1113 /* Here, either we don't have nl_langinfo, or it didn't return a
1114 * codeset. Try MB_CUR_MAX */
1115
119ee68b
KW
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;
1121
69014004
KW
1122 DEBUG_L(PerlIO_printf(Perl_debug_log,
1123 "\tMB_CUR_MAX=%d; ?UTF8 locale=%d\n",
1124 (int) MB_CUR_MAX, is_utf8));
1125
119ee68b
KW
1126 Safefree(save_input_locale);
1127
1128# ifdef HAS_MBTOWC
1129
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
1133 * result */
1134 if (is_utf8) {
1135 wchar_t wc;
856b881c 1136 PERL_UNUSED_RESULT(mbtowc(&wc, NULL, 0));/* Reset any shift state */
69014004 1137 errno = 0;
f019f68f 1138 if ((size_t)mbtowc(&wc, HYPHEN_UTF8, strlen(HYPHEN_UTF8))
119ee68b
KW
1139 != strlen(HYPHEN_UTF8)
1140 || wc != (wchar_t) 0x2010)
1141 {
1142 is_utf8 = FALSE;
69014004
KW
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));
119ee68b
KW
1147 }
1148 }
119ee68b
KW
1149# endif
1150
1d958db2
KW
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);
119ee68b 1155 }
7d74bb61 1156
1d958db2 1157 return is_utf8;
119ee68b 1158# endif
7d74bb61 1159 }
119ee68b 1160
7d74bb61
KW
1161 cant_use_nllanginfo:
1162
0080c90a
KW
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 */
7d74bb61 1166
97f4de96
KW
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
609548d2
KW
1171 * too, as the odds of a non-UTF8 string being valid UTF-8 are quite small
1172 * */
fa9b773e
KW
1173
1174#ifdef HAS_LOCALECONV
fa9b773e 1175# ifdef USE_LOCALE_MONETARY
fa9b773e
KW
1176 {
1177 char *save_monetary_locale = NULL;
fa9b773e 1178 bool only_ascii = FALSE;
13542a67
KW
1179 bool is_utf8 = FALSE;
1180 struct lconv* lc;
fa9b773e 1181
97f4de96
KW
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 */
1184
fa9b773e
KW
1185 if (category != LC_MONETARY) {
1186
4f72bb37 1187 save_monetary_locale = setlocale(LC_MONETARY, NULL);
fa9b773e 1188 if (! save_monetary_locale) {
69014004
KW
1189 DEBUG_L(PerlIO_printf(Perl_debug_log,
1190 "Could not find current locale for LC_MONETARY\n"));
fa9b773e
KW
1191 goto cant_use_monetary;
1192 }
4f72bb37 1193 save_monetary_locale = stdize_locale(savepv(save_monetary_locale));
fa9b773e 1194
13542a67
KW
1195 if (strEQ(save_monetary_locale, save_input_locale)) {
1196 Safefree(save_monetary_locale);
1197 save_monetary_locale = NULL;
1198 }
1199 else if (! setlocale(LC_MONETARY, save_input_locale)) {
59c234b4
KW
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;
fa9b773e
KW
1205 }
1206 }
1207
1208 /* Here the current LC_MONETARY is set to the locale of the category
1209 * whose information is desired. */
1210
13542a67
KW
1211 lc = localeconv();
1212 if (! lc
1213 || ! lc->currency_symbol
1214 || is_ascii_string((U8 *) lc->currency_symbol, 0))
1215 {
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));
1217 only_ascii = TRUE;
1218 }
1219 else {
1220 is_utf8 = is_utf8_string((U8 *) lc->currency_symbol, 0);
fa9b773e
KW
1221 }
1222
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);
1227 }
1228
13542a67 1229 if (! only_ascii) {
fa9b773e 1230
59c234b4
KW
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);
1237 return is_utf8;
13542a67 1238 }
fa9b773e
KW
1239 }
1240 cant_use_monetary:
1241
1242# endif /* USE_LOCALE_MONETARY */
1243#endif /* HAS_LOCALECONV */
1244
15f7e74e
KW
1245#if defined(HAS_STRFTIME) && defined(USE_LOCALE_TIME)
1246
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 */
1249 {
1250 char *save_time_locale = NULL;
1251 int hour = 10;
1252 bool is_dst = FALSE;
1253 int dom = 1;
1254 int month = 0;
1255 int i;
1256 char * formatted_time;
1257
1258
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 */
1261
1262 if (category != LC_TIME) {
1263
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"));
1268 goto cant_use_time;
1269 }
1270 save_time_locale = stdize_locale(savepv(save_time_locale));
1271
1272 if (strEQ(save_time_locale, save_input_locale)) {
1273 Safefree(save_time_locale);
1274 save_time_locale = NULL;
1275 }
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);
1281 goto cant_use_time;
1282 }
1283 }
1284
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 */
1290
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)) {
1295
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
1299 * month */
1300 is_dst = ! is_dst;
1301 hour = (hour + 12) % 24;
1302 dom++;
1303 if (i > 6) {
1304 month++;
1305 }
1306 continue;
1307 }
1308
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);
1315 }
1316
1317 DEBUG_L(PerlIO_printf(Perl_debug_log, "\t?time-related strings for %s are UTF-8=%d\n",
1318 save_input_locale,
1319 is_utf8_string((U8 *) formatted_time, 0)));
1320 Safefree(save_input_locale);
1321 return is_utf8_string((U8 *) formatted_time, 0);
1322 }
1323
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);
1330 }
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));
1332 }
1333 cant_use_time:
1334
1335#endif
1336
1337#if 0 && defined(USE_LOCALE_MESSAGES) && defined(HAS_SYS_ERRLIST)
855aeb93
JH
1338
1339/* This code is ifdefd out because it was found to not be necessary in testing
5857e934
KW
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
855aeb93
JH
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
5857e934
KW
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. */
1350 {
855aeb93 1351 int e;
5857e934
KW
1352 bool is_utf8 = FALSE;
1353 bool non_ascii = FALSE;
855aeb93 1354 char *save_messages_locale = NULL;
5857e934 1355 const char * errmsg = NULL;
855aeb93 1356
5857e934
KW
1357 /* Like above, we set LC_MESSAGES to the locale of the desired
1358 * category, if it isn't that locale already */
855aeb93
JH
1359
1360 if (category != LC_MESSAGES) {
1361
5857e934 1362 save_messages_locale = setlocale(LC_MESSAGES, NULL);
855aeb93 1363 if (! save_messages_locale) {
5857e934
KW
1364 DEBUG_L(PerlIO_printf(Perl_debug_log,
1365 "Could not find current locale for LC_MESSAGES\n"));
855aeb93
JH
1366 goto cant_use_messages;
1367 }
5857e934 1368 save_messages_locale = stdize_locale(savepv(save_messages_locale));
855aeb93
JH
1369
1370 if (strEQ(save_messages_locale, save_input_locale)) {
5857e934
KW
1371 Safefree(save_messages_locale);
1372 save_messages_locale = NULL;
855aeb93
JH
1373 }
1374 else if (! setlocale(LC_MESSAGES, save_input_locale)) {
5857e934
KW
1375 DEBUG_L(PerlIO_printf(Perl_debug_log,
1376 "Could not change LC_MESSAGES locale to %s\n",
1377 save_input_locale));
855aeb93
JH
1378 Safefree(save_messages_locale);
1379 goto cant_use_messages;
1380 }
1381 }
1382
1383 /* Here the current LC_MESSAGES is set to the locale of the category
5857e934
KW
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 */
855aeb93 1387
5857e934
KW
1388 for (e = 0; e <= sys_nerr; e++) {
1389 errno = 0;
1390 errmsg = sys_errlist[e];
1391 if (errno || !errmsg) {
855aeb93
JH
1392 break;
1393 }
5857e934
KW
1394 errmsg = savepv(errmsg);
1395 if (! is_ascii_string((U8 *) errmsg, 0)) {
1396 non_ascii = TRUE;
1397 is_utf8 = is_utf8_string((U8 *) errmsg, 0);
1398 break;
855aeb93
JH
1399 }
1400 }
5857e934 1401 Safefree(errmsg);
855aeb93
JH
1402
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);
1407 }
1408
5857e934
KW
1409 if (non_ascii) {
1410
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",
1414 save_input_locale,
1415 is_utf8));
1416 Safefree(save_input_locale);
1417 return is_utf8;
1418 }
855aeb93 1419
5857e934 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));
855aeb93
JH
1421 }
1422 cant_use_messages:
1423
1424#endif
fa9b773e 1425
0080c90a
KW
1426#endif /* the code that is compiled when no nl_langinfo */
1427
97f4de96
KW
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 */
1434
1435 final_pos = strlen(save_input_locale) - 1;
1436 if (final_pos >= 3) {
1437 char *name = save_input_locale;
1438
1439 /* Find next 'U' or 'u' and look from there */
1440 while ((name += strcspn(name, "Uu") + 1)
1441 <= save_input_locale + final_pos - 2)
1442 {
1443 if (toFOLD(*(name)) != 't'
1444 || toFOLD(*(name + 1)) != 'f')
1445 {
1446 continue;
1447 }
1448 name += 2;
1449 if (*(name) == '-') {
1450 if ((name > save_input_locale + final_pos - 1)) {
1451 break;
1452 }
1453 name++;
1454 }
1455 if (*(name) == '8') {
97f4de96
KW
1456 DEBUG_L(PerlIO_printf(Perl_debug_log,
1457 "Locale %s ends with UTF-8 in name\n",
1458 save_input_locale));
00c54b9c 1459 Safefree(save_input_locale);
97f4de96
KW
1460 return TRUE;
1461 }
1462 }
1463 DEBUG_L(PerlIO_printf(Perl_debug_log,
1464 "Locale %s doesn't end with UTF-8 in name\n",
1465 save_input_locale));
1466 }
1467
1468#ifdef WIN32
1469 /* http://msdn.microsoft.com/en-us/library/windows/desktop/dd317756.aspx */
1470 if (final_pos >= 4
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')
1476 {
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);
1481 return TRUE;
1482 }
1483#endif
1484
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 */
1488#if 0
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);
1494 return FALSE;
1495 }
1496#endif
1497
69014004
KW
1498 DEBUG_L(PerlIO_printf(Perl_debug_log,
1499 "Assuming locale %s is not a UTF-8 locale\n",
1500 save_input_locale));
fa9b773e 1501 Safefree(save_input_locale);
7d74bb61
KW
1502 return FALSE;
1503}
1504
8ef6e574 1505#endif
7d74bb61 1506
d6ded950
KW
1507
1508bool
1509Perl__is_in_locale_category(pTHX_ const bool compiling, const int category)
1510{
1a4f13e1 1511 dVAR;
d6ded950
KW
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). */
1515
1516 const COP * const cop = (compiling) ? &PL_compiling : PL_curcop;
1517
1518 SV *categories = cop_hints_fetch_pvs(cop, "locale", 0);
1519 if (! categories || categories == &PL_sv_placeholder) {
1520 return FALSE;
1521 }
1522
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)));
1527}
1528
2c6ee1a7
KW
1529char *
1530Perl_my_strerror(pTHX_ const int errnum) {
1531
1532 /* Uses C locale for the error text unless within scope of 'use locale' for
1533 * LC_MESSAGES */
1534
1535#ifdef USE_LOCALE_MESSAGES
8ee4b769 1536 if (! IN_LC(LC_MESSAGES)) {
2c6ee1a7 1537 char * save_locale = setlocale(LC_MESSAGES, NULL);
a39edc4c 1538 if (! isNAME_C_OR_POSIX(save_locale)) {
2c6ee1a7
KW
1539 char *errstr;
1540
1541 /* The next setlocale likely will zap this, so create a copy */
1542 save_locale = savepv(save_locale);
1543
1544 setlocale(LC_MESSAGES, "C");
1545
1546 /* This points to the static space in Strerror, with all its
1547 * limitations */
1548 errstr = Strerror(errnum);
1549
1550 setlocale(LC_MESSAGES, save_locale);
1551 Safefree(save_locale);
1552 return errstr;
1553 }
1554 }
1555#endif
1556
1557 return Strerror(errnum);
1558}
1559
66610fdd
RGS
1560/*
1561 * Local variables:
1562 * c-indentation-style: bsd
1563 * c-basic-offset: 4
14d04a33 1564 * indent-tabs-mode: nil
66610fdd
RGS
1565 * End:
1566 *
14d04a33 1567 * ex: set ts=8 sts=4 sw=4 et:
37442d52 1568 */