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98994639
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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
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5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
4ac71550
TC
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!
19 *
20 * [p.238 of _The Lord of the Rings_, II/i: "Many Meetings"]
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21 */
22
166f8a29
DM
23/* utility functions for handling locale-specific stuff like what
24 * character represents the decimal point.
25 */
26
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27#include "EXTERN.h"
28#define PERL_IN_LOCALE_C
29#include "perl.h"
30
31#ifdef I_LOCALE
32# include <locale.h>
33#endif
34
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JH
35#ifdef I_LANGINFO
36# include <langinfo.h>
37#endif
38
a4af207c
JH
39#include "reentr.h"
40
27da23d5 41#if defined(USE_LOCALE_NUMERIC) || defined(USE_LOCALE_COLLATE)
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42/*
43 * Standardize the locale name from a string returned by 'setlocale'.
44 *
45 * The standard return value of setlocale() is either
46 * (1) "xx_YY" if the first argument of setlocale() is not LC_ALL
47 * (2) "xa_YY xb_YY ..." if the first argument of setlocale() is LC_ALL
48 * (the space-separated values represent the various sublocales,
486ec47a 49 * in some unspecified order)
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50 *
51 * In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n",
52 * which is harmful for further use of the string in setlocale().
53 *
54 */
55STATIC char *
56S_stdize_locale(pTHX_ char *locs)
57{
7452cf6a 58 const char * const s = strchr(locs, '=');
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59 bool okay = TRUE;
60
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61 PERL_ARGS_ASSERT_STDIZE_LOCALE;
62
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63 if (s) {
64 const char * const t = strchr(s, '.');
98994639 65 okay = FALSE;
8772537c
AL
66 if (t) {
67 const char * const u = strchr(t, '\n');
68 if (u && (u[1] == 0)) {
69 const STRLEN len = u - s;
70 Move(s + 1, locs, len, char);
71 locs[len] = 0;
72 okay = TRUE;
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73 }
74 }
75 }
76
77 if (!okay)
78 Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs);
79
80 return locs;
81}
27da23d5 82#endif
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83
84void
85Perl_set_numeric_radix(pTHX)
86{
87#ifdef USE_LOCALE_NUMERIC
97aff369 88 dVAR;
98994639 89# ifdef HAS_LOCALECONV
7452cf6a 90 const struct lconv* const lc = localeconv();
98994639 91
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92 if (lc && lc->decimal_point) {
93 if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) {
94 SvREFCNT_dec(PL_numeric_radix_sv);
a0714e2c 95 PL_numeric_radix_sv = NULL;
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96 }
97 else {
98 if (PL_numeric_radix_sv)
99 sv_setpv(PL_numeric_radix_sv, lc->decimal_point);
100 else
101 PL_numeric_radix_sv = newSVpv(lc->decimal_point, 0);
102 }
103 }
104 else
a0714e2c 105 PL_numeric_radix_sv = NULL;
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106# endif /* HAS_LOCALECONV */
107#endif /* USE_LOCALE_NUMERIC */
108}
109
110/*
111 * Set up for a new numeric locale.
112 */
113void
8772537c 114Perl_new_numeric(pTHX_ const char *newnum)
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115{
116#ifdef USE_LOCALE_NUMERIC
97aff369 117 dVAR;
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118
119 if (! newnum) {
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120 Safefree(PL_numeric_name);
121 PL_numeric_name = NULL;
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122 PL_numeric_standard = TRUE;
123 PL_numeric_local = TRUE;
124 return;
125 }
126
127 if (! PL_numeric_name || strNE(PL_numeric_name, newnum)) {
128 Safefree(PL_numeric_name);
129 PL_numeric_name = stdize_locale(savepv(newnum));
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130 PL_numeric_standard = ((*newnum == 'C' && newnum[1] == '\0')
131 || strEQ(newnum, "POSIX"));
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132 PL_numeric_local = TRUE;
133 set_numeric_radix();
134 }
135
136#endif /* USE_LOCALE_NUMERIC */
137}
138
139void
140Perl_set_numeric_standard(pTHX)
141{
142#ifdef USE_LOCALE_NUMERIC
97aff369 143 dVAR;
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144
145 if (! PL_numeric_standard) {
146 setlocale(LC_NUMERIC, "C");
147 PL_numeric_standard = TRUE;
148 PL_numeric_local = FALSE;
149 set_numeric_radix();
150 }
151
152#endif /* USE_LOCALE_NUMERIC */
153}
154
155void
156Perl_set_numeric_local(pTHX)
157{
158#ifdef USE_LOCALE_NUMERIC
97aff369 159 dVAR;
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160
161 if (! PL_numeric_local) {
162 setlocale(LC_NUMERIC, PL_numeric_name);
163 PL_numeric_standard = FALSE;
164 PL_numeric_local = TRUE;
165 set_numeric_radix();
166 }
167
168#endif /* USE_LOCALE_NUMERIC */
169}
170
171/*
172 * Set up for a new ctype locale.
173 */
174void
8772537c 175Perl_new_ctype(pTHX_ const char *newctype)
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176{
177#ifdef USE_LOCALE_CTYPE
27da23d5 178 dVAR;
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179 int i;
180
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181 PERL_ARGS_ASSERT_NEW_CTYPE;
182
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183 for (i = 0; i < 256; i++) {
184 if (isUPPER_LC(i))
185 PL_fold_locale[i] = toLOWER_LC(i);
186 else if (isLOWER_LC(i))
187 PL_fold_locale[i] = toUPPER_LC(i);
188 else
189 PL_fold_locale[i] = i;
190 }
191
192#endif /* USE_LOCALE_CTYPE */
7918f24d 193 PERL_ARGS_ASSERT_NEW_CTYPE;
8772537c 194 PERL_UNUSED_ARG(newctype);
96a5add6 195 PERL_UNUSED_CONTEXT;
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196}
197
198/*
199 * Set up for a new collation locale.
200 */
201void
8772537c 202Perl_new_collate(pTHX_ const char *newcoll)
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203{
204#ifdef USE_LOCALE_COLLATE
97aff369 205 dVAR;
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206
207 if (! newcoll) {
208 if (PL_collation_name) {
209 ++PL_collation_ix;
210 Safefree(PL_collation_name);
211 PL_collation_name = NULL;
212 }
213 PL_collation_standard = TRUE;
214 PL_collxfrm_base = 0;
215 PL_collxfrm_mult = 2;
216 return;
217 }
218
219 if (! PL_collation_name || strNE(PL_collation_name, newcoll)) {
220 ++PL_collation_ix;
221 Safefree(PL_collation_name);
222 PL_collation_name = stdize_locale(savepv(newcoll));
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223 PL_collation_standard = ((*newcoll == 'C' && newcoll[1] == '\0')
224 || strEQ(newcoll, "POSIX"));
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225
226 {
227 /* 2: at most so many chars ('a', 'b'). */
228 /* 50: surely no system expands a char more. */
229#define XFRMBUFSIZE (2 * 50)
230 char xbuf[XFRMBUFSIZE];
8772537c
AL
231 const Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
232 const Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
233 const SSize_t mult = fb - fa;
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234 if (mult < 1)
235 Perl_croak(aTHX_ "strxfrm() gets absurd");
eb160463 236 PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0;
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237 PL_collxfrm_mult = mult;
238 }
239 }
240
241#endif /* USE_LOCALE_COLLATE */
242}
243
244/*
245 * Initialize locale awareness.
246 */
247int
248Perl_init_i18nl10n(pTHX_ int printwarn)
249{
250 int ok = 1;
251 /* returns
252 * 1 = set ok or not applicable,
253 * 0 = fallback to C locale,
254 * -1 = fallback to C locale failed
255 */
256
257#if defined(USE_LOCALE)
97aff369 258 dVAR;
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259
260#ifdef USE_LOCALE_CTYPE
261 char *curctype = NULL;
262#endif /* USE_LOCALE_CTYPE */
263#ifdef USE_LOCALE_COLLATE
264 char *curcoll = NULL;
265#endif /* USE_LOCALE_COLLATE */
266#ifdef USE_LOCALE_NUMERIC
267 char *curnum = NULL;
268#endif /* USE_LOCALE_NUMERIC */
269#ifdef __GLIBC__
7452cf6a 270 char * const language = PerlEnv_getenv("LANGUAGE");
98994639 271#endif
7452cf6a
AL
272 char * const lc_all = PerlEnv_getenv("LC_ALL");
273 char * const lang = PerlEnv_getenv("LANG");
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274 bool setlocale_failure = FALSE;
275
276#ifdef LOCALE_ENVIRON_REQUIRED
277
278 /*
279 * Ultrix setlocale(..., "") fails if there are no environment
280 * variables from which to get a locale name.
281 */
282
283 bool done = FALSE;
284
285#ifdef LC_ALL
286 if (lang) {
287 if (setlocale(LC_ALL, ""))
288 done = TRUE;
289 else
290 setlocale_failure = TRUE;
291 }
292 if (!setlocale_failure) {
293#ifdef USE_LOCALE_CTYPE
56279a21 294 Safefree(curctype);
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295 if (! (curctype =
296 setlocale(LC_CTYPE,
297 (!done && (lang || PerlEnv_getenv("LC_CTYPE")))
bd61b366 298 ? "" : NULL)))
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299 setlocale_failure = TRUE;
300 else
301 curctype = savepv(curctype);
302#endif /* USE_LOCALE_CTYPE */
303#ifdef USE_LOCALE_COLLATE
56279a21 304 Safefree(curcoll);
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305 if (! (curcoll =
306 setlocale(LC_COLLATE,
307 (!done && (lang || PerlEnv_getenv("LC_COLLATE")))
bd61b366 308 ? "" : NULL)))
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309 setlocale_failure = TRUE;
310 else
311 curcoll = savepv(curcoll);
312#endif /* USE_LOCALE_COLLATE */
313#ifdef USE_LOCALE_NUMERIC
56279a21 314 Safefree(curnum);
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315 if (! (curnum =
316 setlocale(LC_NUMERIC,
317 (!done && (lang || PerlEnv_getenv("LC_NUMERIC")))
bd61b366 318 ? "" : NULL)))
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319 setlocale_failure = TRUE;
320 else
321 curnum = savepv(curnum);
322#endif /* USE_LOCALE_NUMERIC */
323 }
324
325#endif /* LC_ALL */
326
327#endif /* !LOCALE_ENVIRON_REQUIRED */
328
329#ifdef LC_ALL
330 if (! setlocale(LC_ALL, ""))
331 setlocale_failure = TRUE;
332#endif /* LC_ALL */
333
334 if (!setlocale_failure) {
335#ifdef USE_LOCALE_CTYPE
6cb43dbf 336 Safefree(curctype);
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337 if (! (curctype = setlocale(LC_CTYPE, "")))
338 setlocale_failure = TRUE;
339 else
340 curctype = savepv(curctype);
341#endif /* USE_LOCALE_CTYPE */
342#ifdef USE_LOCALE_COLLATE
6cb43dbf 343 Safefree(curcoll);
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344 if (! (curcoll = setlocale(LC_COLLATE, "")))
345 setlocale_failure = TRUE;
346 else
347 curcoll = savepv(curcoll);
348#endif /* USE_LOCALE_COLLATE */
349#ifdef USE_LOCALE_NUMERIC
6cb43dbf 350 Safefree(curnum);
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351 if (! (curnum = setlocale(LC_NUMERIC, "")))
352 setlocale_failure = TRUE;
353 else
354 curnum = savepv(curnum);
355#endif /* USE_LOCALE_NUMERIC */
356 }
357
358 if (setlocale_failure) {
359 char *p;
0bd48802 360 const bool locwarn = (printwarn > 1 ||
98994639
HS
361 (printwarn &&
362 (!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p))));
363
364 if (locwarn) {
365#ifdef LC_ALL
366
367 PerlIO_printf(Perl_error_log,
368 "perl: warning: Setting locale failed.\n");
369
370#else /* !LC_ALL */
371
372 PerlIO_printf(Perl_error_log,
373 "perl: warning: Setting locale failed for the categories:\n\t");
374#ifdef USE_LOCALE_CTYPE
375 if (! curctype)
376 PerlIO_printf(Perl_error_log, "LC_CTYPE ");
377#endif /* USE_LOCALE_CTYPE */
378#ifdef USE_LOCALE_COLLATE
379 if (! curcoll)
380 PerlIO_printf(Perl_error_log, "LC_COLLATE ");
381#endif /* USE_LOCALE_COLLATE */
382#ifdef USE_LOCALE_NUMERIC
383 if (! curnum)
384 PerlIO_printf(Perl_error_log, "LC_NUMERIC ");
385#endif /* USE_LOCALE_NUMERIC */
386 PerlIO_printf(Perl_error_log, "\n");
387
388#endif /* LC_ALL */
389
390 PerlIO_printf(Perl_error_log,
391 "perl: warning: Please check that your locale settings:\n");
392
393#ifdef __GLIBC__
394 PerlIO_printf(Perl_error_log,
395 "\tLANGUAGE = %c%s%c,\n",
396 language ? '"' : '(',
397 language ? language : "unset",
398 language ? '"' : ')');
399#endif
400
401 PerlIO_printf(Perl_error_log,
402 "\tLC_ALL = %c%s%c,\n",
403 lc_all ? '"' : '(',
404 lc_all ? lc_all : "unset",
405 lc_all ? '"' : ')');
406
407#if defined(USE_ENVIRON_ARRAY)
408 {
409 char **e;
410 for (e = environ; *e; e++) {
411 if (strnEQ(*e, "LC_", 3)
412 && strnNE(*e, "LC_ALL=", 7)
413 && (p = strchr(*e, '=')))
414 PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
415 (int)(p - *e), *e, p + 1);
416 }
417 }
418#else
419 PerlIO_printf(Perl_error_log,
420 "\t(possibly more locale environment variables)\n");
421#endif
422
423 PerlIO_printf(Perl_error_log,
424 "\tLANG = %c%s%c\n",
425 lang ? '"' : '(',
426 lang ? lang : "unset",
427 lang ? '"' : ')');
428
429 PerlIO_printf(Perl_error_log,
430 " are supported and installed on your system.\n");
431 }
432
433#ifdef LC_ALL
434
435 if (setlocale(LC_ALL, "C")) {
436 if (locwarn)
437 PerlIO_printf(Perl_error_log,
438 "perl: warning: Falling back to the standard locale (\"C\").\n");
439 ok = 0;
440 }
441 else {
442 if (locwarn)
443 PerlIO_printf(Perl_error_log,
444 "perl: warning: Failed to fall back to the standard locale (\"C\").\n");
445 ok = -1;
446 }
447
448#else /* ! LC_ALL */
449
450 if (0
451#ifdef USE_LOCALE_CTYPE
452 || !(curctype || setlocale(LC_CTYPE, "C"))
453#endif /* USE_LOCALE_CTYPE */
454#ifdef USE_LOCALE_COLLATE
455 || !(curcoll || setlocale(LC_COLLATE, "C"))
456#endif /* USE_LOCALE_COLLATE */
457#ifdef USE_LOCALE_NUMERIC
458 || !(curnum || setlocale(LC_NUMERIC, "C"))
459#endif /* USE_LOCALE_NUMERIC */
460 )
461 {
462 if (locwarn)
463 PerlIO_printf(Perl_error_log,
464 "perl: warning: Cannot fall back to the standard locale (\"C\").\n");
465 ok = -1;
466 }
467
468#endif /* ! LC_ALL */
469
470#ifdef USE_LOCALE_CTYPE
56279a21 471 Safefree(curctype);
bd61b366 472 curctype = savepv(setlocale(LC_CTYPE, NULL));
98994639
HS
473#endif /* USE_LOCALE_CTYPE */
474#ifdef USE_LOCALE_COLLATE
56279a21 475 Safefree(curcoll);
bd61b366 476 curcoll = savepv(setlocale(LC_COLLATE, NULL));
98994639
HS
477#endif /* USE_LOCALE_COLLATE */
478#ifdef USE_LOCALE_NUMERIC
56279a21 479 Safefree(curnum);
bd61b366 480 curnum = savepv(setlocale(LC_NUMERIC, NULL));
98994639
HS
481#endif /* USE_LOCALE_NUMERIC */
482 }
483 else {
484
485#ifdef USE_LOCALE_CTYPE
486 new_ctype(curctype);
487#endif /* USE_LOCALE_CTYPE */
488
489#ifdef USE_LOCALE_COLLATE
490 new_collate(curcoll);
491#endif /* USE_LOCALE_COLLATE */
492
493#ifdef USE_LOCALE_NUMERIC
494 new_numeric(curnum);
495#endif /* USE_LOCALE_NUMERIC */
b310b053 496
98994639
HS
497 }
498
499#endif /* USE_LOCALE */
500
ec71e770 501#ifdef USE_PERLIO
b310b053 502 {
fde18df1 503 /* Set PL_utf8locale to TRUE if using PerlIO _and_
ec71e770 504 any of the following are true:
085a54d9 505 - nl_langinfo(CODESET) contains /^utf-?8/i
61de9fb5 506 - $ENV{LC_ALL} contains /^utf-?8/i
085a54d9 507 - $ENV{LC_CTYPE} contains /^utf-?8/i
61de9fb5
JH
508 - $ENV{LANG} contains /^utf-?8/i
509 The LC_ALL, LC_CTYPE, LANG obey the usual override
510 hierarchy of locale environment variables. (LANGUAGE
511 affects only LC_MESSAGES only under glibc.) (If present,
512 it overrides LC_MESSAGES for GNU gettext, and it also
513 can have more than one locale, separated by spaces,
514 in case you need to know.)
8aa8f774 515 If PL_utf8locale and PL_unicode (set by -C or by $ENV{PERL_UNICODE})
a05d7ebb 516 are true, perl.c:S_parse_body() will turn on the PerlIO :utf8 layer
fde18df1 517 on STDIN, STDOUT, STDERR, _and_ the default open discipline.
085a54d9 518 */
fde18df1 519 bool utf8locale = FALSE;
b310b053
JH
520 char *codeset = NULL;
521#if defined(HAS_NL_LANGINFO) && defined(CODESET)
522 codeset = nl_langinfo(CODESET);
523#endif
61de9fb5 524 if (codeset)
e6226b18
KW
525 utf8locale = (foldEQ(codeset, STR_WITH_LEN("UTF-8"))
526 || foldEQ(codeset, STR_WITH_LEN("UTF8") ));
077a72a9 527#if defined(USE_LOCALE)
61de9fb5
JH
528 else { /* nl_langinfo(CODESET) is supposed to correctly
529 * interpret the locale environment variables,
530 * but just in case it fails, let's do this manually. */
531 if (lang)
e6226b18
KW
532 utf8locale = (foldEQ(lang, STR_WITH_LEN("UTF-8"))
533 || foldEQ(lang, STR_WITH_LEN("UTF8") ));
b310b053 534#ifdef USE_LOCALE_CTYPE
61de9fb5 535 if (curctype)
e6226b18
KW
536 utf8locale = (foldEQ(curctype, STR_WITH_LEN("UTF-8"))
537 || foldEQ(curctype, STR_WITH_LEN("UTF8") ));
b310b053 538#endif
61de9fb5 539 if (lc_all)
e6226b18
KW
540 utf8locale = (foldEQ(lc_all, STR_WITH_LEN("UTF-8"))
541 || foldEQ(lc_all, STR_WITH_LEN("UTF8") ));
61de9fb5 542 }
fde18df1
JH
543#endif /* USE_LOCALE */
544 if (utf8locale)
545 PL_utf8locale = TRUE;
546 }
a05d7ebb 547 /* Set PL_unicode to $ENV{PERL_UNICODE} if using PerlIO.
fde18df1
JH
548 This is an alternative to using the -C command line switch
549 (the -C if present will override this). */
550 {
dd374669 551 const char *p = PerlEnv_getenv("PERL_UNICODE");
a05d7ebb 552 PL_unicode = p ? parse_unicode_opts(&p) : 0;
5a22a2bb
NC
553 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
554 PL_utf8cache = -1;
b310b053 555 }
ec71e770 556#endif
b310b053 557
98994639 558#ifdef USE_LOCALE_CTYPE
43c5f42d 559 Safefree(curctype);
98994639
HS
560#endif /* USE_LOCALE_CTYPE */
561#ifdef USE_LOCALE_COLLATE
43c5f42d 562 Safefree(curcoll);
98994639
HS
563#endif /* USE_LOCALE_COLLATE */
564#ifdef USE_LOCALE_NUMERIC
43c5f42d 565 Safefree(curnum);
98994639
HS
566#endif /* USE_LOCALE_NUMERIC */
567 return ok;
568}
569
98994639
HS
570#ifdef USE_LOCALE_COLLATE
571
572/*
573 * mem_collxfrm() is a bit like strxfrm() but with two important
574 * differences. First, it handles embedded NULs. Second, it allocates
575 * a bit more memory than needed for the transformed data itself.
576 * The real transformed data begins at offset sizeof(collationix).
577 * Please see sv_collxfrm() to see how this is used.
578 */
166f8a29 579
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HS
580char *
581Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen)
582{
97aff369 583 dVAR;
98994639
HS
584 char *xbuf;
585 STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
586
7918f24d
NC
587 PERL_ARGS_ASSERT_MEM_COLLXFRM;
588
98994639
HS
589 /* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
590 /* the +1 is for the terminating NUL. */
591
592 xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
a02a5408 593 Newx(xbuf, xAlloc, char);
98994639
HS
594 if (! xbuf)
595 goto bad;
596
597 *(U32*)xbuf = PL_collation_ix;
598 xout = sizeof(PL_collation_ix);
599 for (xin = 0; xin < len; ) {
224e8ef5 600 Size_t xused;
98994639
HS
601
602 for (;;) {
603 xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
224e8ef5 604 if (xused >= PERL_INT_MAX)
98994639 605 goto bad;
eb160463 606 if ((STRLEN)xused < xAlloc - xout)
98994639
HS
607 break;
608 xAlloc = (2 * xAlloc) + 1;
609 Renew(xbuf, xAlloc, char);
610 if (! xbuf)
611 goto bad;
612 }
613
614 xin += strlen(s + xin) + 1;
615 xout += xused;
616
617 /* Embedded NULs are understood but silently skipped
618 * because they make no sense in locale collation. */
619 }
620
621 xbuf[xout] = '\0';
622 *xlen = xout - sizeof(PL_collation_ix);
623 return xbuf;
624
625 bad:
626 Safefree(xbuf);
627 *xlen = 0;
628 return NULL;
629}
630
631#endif /* USE_LOCALE_COLLATE */
632
66610fdd
RGS
633/*
634 * Local variables:
635 * c-indentation-style: bsd
636 * c-basic-offset: 4
637 * indent-tabs-mode: t
638 * End:
639 *
37442d52
RGS
640 * ex: set ts=8 sts=4 sw=4 noet:
641 */