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Fix for Coverity perl5 CID 45366: Use after free (USE_AFTER_FREE) pass_freed_arg...
[perl5.git] / locale.c
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1/* locale.c
2 *
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3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 * 2002, 2003, 2005, 2006, 2007, 2008 by Larry Wall and others
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5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
4ac71550 12 * A Elbereth Gilthoniel,
cdad3b53 13 * silivren penna míriel
4ac71550 14 * o menel aglar elenath!
cdad3b53 15 * Na-chaered palan-díriel
4ac71550
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16 * o galadhremmin ennorath,
17 * Fanuilos, le linnathon
18 * nef aear, si nef aearon!
19 *
20 * [p.238 of _The Lord of the Rings_, II/i: "Many Meetings"]
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21 */
22
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23/* utility functions for handling locale-specific stuff like what
24 * character represents the decimal point.
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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.
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33 */
34
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35#include "EXTERN.h"
36#define PERL_IN_LOCALE_C
37#include "perl.h"
38
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39#ifdef I_LANGINFO
40# include <langinfo.h>
41#endif
42
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43#include "reentr.h"
44
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45#ifdef USE_LOCALE
46
98994639 47/*
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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
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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.
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56 *
57 * In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n",
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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 '='
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60 *
61 */
62STATIC char *
63S_stdize_locale(pTHX_ char *locs)
64{
7452cf6a 65 const char * const s = strchr(locs, '=');
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66 bool okay = TRUE;
67
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68 PERL_ARGS_ASSERT_STDIZE_LOCALE;
69
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70 if (s) {
71 const char * const t = strchr(s, '.');
98994639 72 okay = FALSE;
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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;
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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
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90#endif
91
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92void
93Perl_set_numeric_radix(pTHX)
94{
95#ifdef USE_LOCALE_NUMERIC
97aff369 96 dVAR;
98994639 97# ifdef HAS_LOCALECONV
7452cf6a 98 const struct lconv* const lc = localeconv();
98994639 99
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100 if (lc && lc->decimal_point) {
101 if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) {
102 SvREFCNT_dec(PL_numeric_radix_sv);
a0714e2c 103 PL_numeric_radix_sv = NULL;
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104 }
105 else {
106 if (PL_numeric_radix_sv)
107 sv_setpv(PL_numeric_radix_sv, lc->decimal_point);
108 else
109 PL_numeric_radix_sv = newSVpv(lc->decimal_point, 0);
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110 if (! is_ascii_string((U8 *) lc->decimal_point, 0)
111 && is_utf8_string((U8 *) lc->decimal_point, 0)
112 && is_cur_LC_category_utf8(LC_NUMERIC))
113 {
114 SvUTF8_on(PL_numeric_radix_sv);
115 }
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116 }
117 }
118 else
a0714e2c 119 PL_numeric_radix_sv = NULL;
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120
121 DEBUG_L(PerlIO_printf(Perl_debug_log, "Locale radix is %s\n",
122 (PL_numeric_radix_sv)
123 ? lc->decimal_point
124 : "NULL"));
125
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126# endif /* HAS_LOCALECONV */
127#endif /* USE_LOCALE_NUMERIC */
128}
129
98994639 130void
8772537c 131Perl_new_numeric(pTHX_ const char *newnum)
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132{
133#ifdef USE_LOCALE_NUMERIC
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134
135 /* Called after all libc setlocale() calls affecting LC_NUMERIC, to tell
136 * core Perl this and that 'newnum' is the name of the new locale.
137 * It installs this locale as the current underlying default.
138 *
139 * The default locale and the C locale can be toggled between by use of the
140 * set_numeric_local() and set_numeric_standard() functions, which should
141 * probably not be called directly, but only via macros like
142 * SET_NUMERIC_STANDARD() in perl.h.
143 *
144 * The toggling is necessary mainly so that a non-dot radix decimal point
145 * character can be output, while allowing internal calculations to use a
146 * dot.
147 *
148 * This sets several interpreter-level variables:
149 * PL_numeric_name The default locale's name: a copy of 'newnum'
150 * PL_numeric_local A boolean indicating if the toggled state is such
151 * that the current locale is the default locale
152 * PL_numeric_standard A boolean indicating if the toggled state is such
153 * that the current locale is the C locale
154 * Note that both of the last two variables can be true at the same time,
155 * if the underlying locale is C. (Toggling is a no-op under these
156 * circumstances.)
157 *
158 * Any code changing the locale (outside this file) should use
159 * POSIX::setlocale, which calls this function. Therefore this function
160 * should be called directly only from this file and from
161 * POSIX::setlocale() */
162
b03f34cf 163 char *save_newnum;
97aff369 164 dVAR;
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165
166 if (! newnum) {
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167 Safefree(PL_numeric_name);
168 PL_numeric_name = NULL;
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169 PL_numeric_standard = TRUE;
170 PL_numeric_local = TRUE;
171 return;
172 }
173
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174 save_newnum = stdize_locale(savepv(newnum));
175 if (! PL_numeric_name || strNE(PL_numeric_name, save_newnum)) {
98994639 176 Safefree(PL_numeric_name);
b03f34cf 177 PL_numeric_name = save_newnum;
b03f34cf 178 }
98994639 179
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180 PL_numeric_standard = ((*save_newnum == 'C' && save_newnum[1] == '\0')
181 || strEQ(save_newnum, "POSIX"));
182 PL_numeric_local = TRUE;
183 set_numeric_radix();
6959d69d 184
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185#endif /* USE_LOCALE_NUMERIC */
186}
187
188void
189Perl_set_numeric_standard(pTHX)
190{
191#ifdef USE_LOCALE_NUMERIC
97aff369 192 dVAR;
98994639 193
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194 /* Toggle the LC_NUMERIC locale to C, if not already there. Probably
195 * should use the macros like SET_NUMERIC_STANDARD() in perl.h instead of
196 * calling this directly. */
197
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198 if (! PL_numeric_standard) {
199 setlocale(LC_NUMERIC, "C");
200 PL_numeric_standard = TRUE;
201 PL_numeric_local = FALSE;
202 set_numeric_radix();
203 }
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204 DEBUG_L(PerlIO_printf(Perl_debug_log,
205 "Underlying LC_NUMERIC locale now is C\n"));
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206
207#endif /* USE_LOCALE_NUMERIC */
208}
209
210void
211Perl_set_numeric_local(pTHX)
212{
213#ifdef USE_LOCALE_NUMERIC
97aff369 214 dVAR;
98994639 215
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216 /* Toggle the LC_NUMERIC locale to the current underlying default, if not
217 * already there. Probably should use the macros like SET_NUMERIC_LOCAL()
218 * in perl.h instead of calling this directly. */
219
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220 if (! PL_numeric_local) {
221 setlocale(LC_NUMERIC, PL_numeric_name);
222 PL_numeric_standard = FALSE;
223 PL_numeric_local = TRUE;
224 set_numeric_radix();
225 }
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226 DEBUG_L(PerlIO_printf(Perl_debug_log,
227 "Underlying LC_NUMERIC locale now is %s\n",
228 PL_numeric_name));
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229
230#endif /* USE_LOCALE_NUMERIC */
231}
232
233/*
234 * Set up for a new ctype locale.
235 */
236void
8772537c 237Perl_new_ctype(pTHX_ const char *newctype)
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238{
239#ifdef USE_LOCALE_CTYPE
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240
241 /* Called after all libc setlocale() calls affecting LC_CTYPE, to tell
242 * core Perl this and that 'newctype' is the name of the new locale.
243 *
244 * This function sets up the folding arrays for all 256 bytes, assuming
245 * that tofold() is tolc() since fold case is not a concept in POSIX,
246 *
247 * Any code changing the locale (outside this file) should use
248 * POSIX::setlocale, which calls this function. Therefore this function
249 * should be called directly only from this file and from
250 * POSIX::setlocale() */
251
27da23d5 252 dVAR;
68067e4e 253 UV i;
98994639 254
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255 PERL_ARGS_ASSERT_NEW_CTYPE;
256
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257 PL_in_utf8_CTYPE_locale = is_cur_LC_category_utf8(LC_CTYPE);
258
259 /* A UTF-8 locale gets standard rules. But note that code still has to
260 * handle this specially because of the three problematic code points */
261 if (PL_in_utf8_CTYPE_locale) {
262 Copy(PL_fold_latin1, PL_fold_locale, 256, U8);
263 }
264 else {
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265 for (i = 0; i < 256; i++) {
266 if (isUPPER_LC((U8) i))
267 PL_fold_locale[i] = (U8) toLOWER_LC((U8) i);
268 else if (isLOWER_LC((U8) i))
269 PL_fold_locale[i] = (U8) toUPPER_LC((U8) i);
270 else
271 PL_fold_locale[i] = (U8) i;
272 }
31f05a37 273 }
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274
275#endif /* USE_LOCALE_CTYPE */
7918f24d 276 PERL_ARGS_ASSERT_NEW_CTYPE;
8772537c 277 PERL_UNUSED_ARG(newctype);
96a5add6 278 PERL_UNUSED_CONTEXT;
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279}
280
98994639 281void
8772537c 282Perl_new_collate(pTHX_ const char *newcoll)
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283{
284#ifdef USE_LOCALE_COLLATE
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285
286 /* Called after all libc setlocale() calls affecting LC_COLLATE, to tell
287 * core Perl this and that 'newcoll' is the name of the new locale.
288 *
289 * Any code changing the locale (outside this file) should use
290 * POSIX::setlocale, which calls this function. Therefore this function
291 * should be called directly only from this file and from
292 * POSIX::setlocale() */
293
97aff369 294 dVAR;
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295
296 if (! newcoll) {
297 if (PL_collation_name) {
298 ++PL_collation_ix;
299 Safefree(PL_collation_name);
300 PL_collation_name = NULL;
301 }
302 PL_collation_standard = TRUE;
303 PL_collxfrm_base = 0;
304 PL_collxfrm_mult = 2;
305 return;
306 }
307
308 if (! PL_collation_name || strNE(PL_collation_name, newcoll)) {
309 ++PL_collation_ix;
310 Safefree(PL_collation_name);
311 PL_collation_name = stdize_locale(savepv(newcoll));
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312 PL_collation_standard = ((*newcoll == 'C' && newcoll[1] == '\0')
313 || strEQ(newcoll, "POSIX"));
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314
315 {
316 /* 2: at most so many chars ('a', 'b'). */
317 /* 50: surely no system expands a char more. */
318#define XFRMBUFSIZE (2 * 50)
319 char xbuf[XFRMBUFSIZE];
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320 const Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
321 const Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
322 const SSize_t mult = fb - fa;
e0601d3c 323 if (mult < 1 && !(fa == 0 && fb == 0))
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324 Perl_croak(aTHX_ "panic: strxfrm() gets absurd - a => %"UVuf", ab => %"UVuf,
325 (UV) fa, (UV) fb);
eb160463 326 PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0;
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327 PL_collxfrm_mult = mult;
328 }
329 }
330
331#endif /* USE_LOCALE_COLLATE */
332}
333
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334#ifdef WIN32
335
336char *
337Perl_my_setlocale(pTHX_ int category, const char* locale)
338{
339 /* This, for Windows, emulates POSIX setlocale() behavior. There is no
340 * difference unless the input locale is "", which means on Windows to get
341 * the machine default, which is set via the computer's "Regional and
342 * Language Options" (or its current equivalent). In POSIX, it instead
343 * means to find the locale from the user's environment. This routine
344 * looks in the environment, and, if anything is found, uses that instead
345 * of going to the machine default. If there is no environment override,
346 * the machine default is used, as normal, by calling the real setlocale()
347 * with "". The POSIX behavior is to use the LC_ALL variable if set;
348 * otherwise to use the particular category's variable if set; otherwise to
349 * use the LANG variable. */
350
481465ea 351 bool override_LC_ALL = 0;
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352 char * result;
353
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354 if (locale && strEQ(locale, "")) {
355# ifdef LC_ALL
356 locale = PerlEnv_getenv("LC_ALL");
357 if (! locale) {
358#endif
359 switch (category) {
360# ifdef LC_ALL
361 case LC_ALL:
481465ea 362 override_LC_ALL = TRUE;
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363 break; /* We already know its variable isn't set */
364# endif
365# ifdef USE_LOCALE_TIME
366 case LC_TIME:
367 locale = PerlEnv_getenv("LC_TIME");
368 break;
369# endif
370# ifdef USE_LOCALE_CTYPE
371 case LC_CTYPE:
372 locale = PerlEnv_getenv("LC_CTYPE");
373 break;
374# endif
375# ifdef USE_LOCALE_COLLATE
376 case LC_COLLATE:
377 locale = PerlEnv_getenv("LC_COLLATE");
378 break;
379# endif
380# ifdef USE_LOCALE_MONETARY
381 case LC_MONETARY:
382 locale = PerlEnv_getenv("LC_MONETARY");
383 break;
384# endif
385# ifdef USE_LOCALE_NUMERIC
386 case LC_NUMERIC:
387 locale = PerlEnv_getenv("LC_NUMERIC");
388 break;
389# endif
390# ifdef USE_LOCALE_MESSAGES
391 case LC_MESSAGES:
392 locale = PerlEnv_getenv("LC_MESSAGES");
393 break;
394# endif
395 default:
396 /* This is a category, like PAPER_SIZE that we don't
397 * know about; and so can't provide a wrapper. */
398 break;
399 }
400 if (! locale) {
401 locale = PerlEnv_getenv("LANG");
481465ea 402 if (! locale) {
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403 locale = "";
404 }
405 }
406# ifdef LC_ALL
407 }
408# endif
409 }
410
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411 result = setlocale(category, locale);
412
481465ea 413 if (! override_LC_ALL) {
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414 return result;
415 }
416
417 /* Here the input locale was LC_ALL, and we have set it to what is in the
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418 * LANG variable or the system default if there is no LANG. But these have
419 * lower priority than the other LC_foo variables, so override it for each
420 * one that is set. (If they are set to "", it means to use the same thing
421 * we just set LC_ALL to, so can skip) */
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422# ifdef USE_LOCALE_TIME
423 result = PerlEnv_getenv("LC_TIME");
730252b2 424 if (result && strNE(result, "")) {
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425 setlocale(LC_TIME, result);
426 }
427# endif
428# ifdef USE_LOCALE_CTYPE
429 result = PerlEnv_getenv("LC_CTYPE");
730252b2 430 if (result && strNE(result, "")) {
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431 setlocale(LC_CTYPE, result);
432 }
433# endif
434# ifdef USE_LOCALE_COLLATE
435 result = PerlEnv_getenv("LC_COLLATE");
730252b2 436 if (result && strNE(result, "")) {
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437 setlocale(LC_COLLATE, result);
438 }
439# endif
440# ifdef USE_LOCALE_MONETARY
441 result = PerlEnv_getenv("LC_MONETARY");
730252b2 442 if (result && strNE(result, "")) {
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443 setlocale(LC_MONETARY, result);
444 }
445# endif
446# ifdef USE_LOCALE_NUMERIC
447 result = PerlEnv_getenv("LC_NUMERIC");
730252b2 448 if (result && strNE(result, "")) {
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449 setlocale(LC_NUMERIC, result);
450 }
451# endif
452# ifdef USE_LOCALE_MESSAGES
453 result = PerlEnv_getenv("LC_MESSAGES");
730252b2 454 if (result && strNE(result, "")) {
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455 setlocale(LC_MESSAGES, result);
456 }
457# endif
458
459 return setlocale(LC_ALL, NULL);
460
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461}
462
463#endif
464
465
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466/*
467 * Initialize locale awareness.
468 */
469int
470Perl_init_i18nl10n(pTHX_ int printwarn)
471{
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472 /* printwarn is
473 *
474 * 0 if not to output warning when setup locale is bad
475 * 1 if to output warning based on value of PERL_BADLANG
476 * >1 if to output regardless of PERL_BADLANG
477 *
478 * returns
98994639 479 * 1 = set ok or not applicable,
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480 * 0 = fallback to a locale of lower priority
481 * -1 = fallback to all locales failed, not even to the C locale
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482 */
483
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484 int ok = 1;
485
98994639 486#if defined(USE_LOCALE)
97aff369 487 dVAR;
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488
489#ifdef USE_LOCALE_CTYPE
490 char *curctype = NULL;
491#endif /* USE_LOCALE_CTYPE */
492#ifdef USE_LOCALE_COLLATE
493 char *curcoll = NULL;
494#endif /* USE_LOCALE_COLLATE */
495#ifdef USE_LOCALE_NUMERIC
496 char *curnum = NULL;
497#endif /* USE_LOCALE_NUMERIC */
498#ifdef __GLIBC__
7452cf6a 499 char * const language = PerlEnv_getenv("LANGUAGE");
98994639 500#endif
65ebb059 501
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502 /* NULL uses the existing already set up locale */
503 const char * const setlocale_init = (PerlEnv_getenv("PERL_SKIP_LOCALE_INIT"))
504 ? NULL
505 : "";
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506 const char* trial_locales[5]; /* 5 = 1 each for "", LC_ALL, LANG, "", C */
507 unsigned int trial_locales_count;
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508 char * const lc_all = PerlEnv_getenv("LC_ALL");
509 char * const lang = PerlEnv_getenv("LANG");
98994639 510 bool setlocale_failure = FALSE;
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511 unsigned int i;
512 char *p;
513 const bool locwarn = (printwarn > 1 ||
514 (printwarn &&
515 (!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p))));
0e92a118 516 bool done = FALSE;
65ebb059 517 const char *system_default_locale = NULL;
0e92a118 518
98994639 519
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520#ifndef LOCALE_ENVIRON_REQUIRED
521 PERL_UNUSED_VAR(done);
522#else
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523
524 /*
525 * Ultrix setlocale(..., "") fails if there are no environment
526 * variables from which to get a locale name.
527 */
528
b3e384bf 529# ifdef LC_ALL
98994639 530 if (lang) {
b385bb4d 531 if (my_setlocale(LC_ALL, setlocale_init))
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532 done = TRUE;
533 else
534 setlocale_failure = TRUE;
535 }
536 if (!setlocale_failure) {
b3e384bf 537# ifdef USE_LOCALE_CTYPE
56279a21 538 Safefree(curctype);
98994639 539 if (! (curctype =
b385bb4d 540 my_setlocale(LC_CTYPE,
98994639 541 (!done && (lang || PerlEnv_getenv("LC_CTYPE")))
ccd65d51 542 ? setlocale_init : NULL)))
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543 setlocale_failure = TRUE;
544 else
545 curctype = savepv(curctype);
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546# endif /* USE_LOCALE_CTYPE */
547# ifdef USE_LOCALE_COLLATE
56279a21 548 Safefree(curcoll);
98994639 549 if (! (curcoll =
b385bb4d 550 my_setlocale(LC_COLLATE,
98994639 551 (!done && (lang || PerlEnv_getenv("LC_COLLATE")))
ccd65d51 552 ? setlocale_init : NULL)))
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553 setlocale_failure = TRUE;
554 else
555 curcoll = savepv(curcoll);
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556# endif /* USE_LOCALE_COLLATE */
557# ifdef USE_LOCALE_NUMERIC
56279a21 558 Safefree(curnum);
98994639 559 if (! (curnum =
b385bb4d 560 my_setlocale(LC_NUMERIC,
98994639 561 (!done && (lang || PerlEnv_getenv("LC_NUMERIC")))
ccd65d51 562 ? setlocale_init : NULL)))
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563 setlocale_failure = TRUE;
564 else
565 curnum = savepv(curnum);
b3e384bf 566# endif /* USE_LOCALE_NUMERIC */
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567# ifdef USE_LOCALE_MESSAGES
568 if (! my_setlocale(LC_MESSAGES,
569 (!done && (lang || PerlEnv_getenv("LC_MESSAGES")))
570 ? setlocale_init : NULL))
571 {
572 setlocale_failure = TRUE;
573 }
574# endif /* USE_LOCALE_MESSAGES */
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575# ifdef USE_LOCALE_MONETARY
576 if (! my_setlocale(LC_MONETARY,
577 (!done && (lang || PerlEnv_getenv("LC_MONETARY")))
578 ? setlocale_init : NULL))
579 {
580 setlocale_failure = TRUE;
581 }
582# endif /* USE_LOCALE_MONETARY */
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583 }
584
b3e384bf 585# endif /* LC_ALL */
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586
587#endif /* !LOCALE_ENVIRON_REQUIRED */
588
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589 /* We try each locale in the list until we get one that works, or exhaust
590 * the list */
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591 trial_locales[0] = setlocale_init;
592 trial_locales_count = 1;
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593 for (i= 0; i < trial_locales_count; i++) {
594 const char * trial_locale = trial_locales[i];
595
596 if (i > 0) {
597
598 /* XXX This is to preserve old behavior for LOCALE_ENVIRON_REQUIRED
599 * when i==0, but I (khw) don't think that behavior makes much
600 * sense */
601 setlocale_failure = FALSE;
602
603#ifdef WIN32
604
605 /* On Windows machines, an entry of "" after the 0th means to use
606 * the system default locale, which we now proceed to get. */
607 if (strEQ(trial_locale, "")) {
608 unsigned int j;
609
610 /* Note that this may change the locale, but we are going to do
611 * that anyway just below */
612 system_default_locale = setlocale(LC_ALL, "");
613
614 /* Skip if invalid or it's already on the list of locales to
615 * try */
616 if (! system_default_locale) {
617 goto next_iteration;
618 }
619 for (j = 0; j < trial_locales_count; j++) {
620 if (strEQ(system_default_locale, trial_locales[j])) {
621 goto next_iteration;
622 }
623 }
624
625 trial_locale = system_default_locale;
626 }
627#endif
628 }
629
98994639 630#ifdef LC_ALL
7cd8b568 631 if (! my_setlocale(LC_ALL, trial_locale)) {
49c85077 632 setlocale_failure = TRUE;
7cd8b568
KW
633 }
634 else {
635 /* Since LC_ALL succeeded, it should have changed all the other
636 * categories it can to its value; so we massage things so that the
637 * setlocales below just return their category's current values.
638 * This adequately handles the case in NetBSD where LC_COLLATE may
639 * not be defined for a locale, and setting it individually will
640 * fail, whereas setting LC_ALL suceeds, leaving LC_COLLATE set to
641 * the POSIX locale. */
642 trial_locale = NULL;
643 }
98994639
HS
644#endif /* LC_ALL */
645
49c85077 646 if (!setlocale_failure) {
98994639 647#ifdef USE_LOCALE_CTYPE
49c85077
KW
648 Safefree(curctype);
649 if (! (curctype = my_setlocale(LC_CTYPE, trial_locale)))
650 setlocale_failure = TRUE;
651 else
652 curctype = savepv(curctype);
98994639
HS
653#endif /* USE_LOCALE_CTYPE */
654#ifdef USE_LOCALE_COLLATE
49c85077
KW
655 Safefree(curcoll);
656 if (! (curcoll = my_setlocale(LC_COLLATE, trial_locale)))
657 setlocale_failure = TRUE;
658 else
659 curcoll = savepv(curcoll);
98994639
HS
660#endif /* USE_LOCALE_COLLATE */
661#ifdef USE_LOCALE_NUMERIC
49c85077
KW
662 Safefree(curnum);
663 if (! (curnum = my_setlocale(LC_NUMERIC, trial_locale)))
664 setlocale_failure = TRUE;
665 else
666 curnum = savepv(curnum);
98994639 667#endif /* USE_LOCALE_NUMERIC */
a782673d
KW
668#ifdef USE_LOCALE_MESSAGES
669 if (! (my_setlocale(LC_MESSAGES, trial_locale)))
670 setlocale_failure = TRUE;
671#endif /* USE_LOCALE_MESSAGES */
c835d6be
KW
672#ifdef USE_LOCALE_MONETARY
673 if (! (my_setlocale(LC_MONETARY, trial_locale)))
674 setlocale_failure = TRUE;
675#endif /* USE_LOCALE_MONETARY */
676
49c85077
KW
677 if (! setlocale_failure) { /* Success */
678 break;
679 }
65ebb059 680 }
98994639 681
49c85077
KW
682 /* Here, something failed; will need to try a fallback. */
683 ok = 0;
65ebb059 684
49c85077
KW
685 if (i == 0) {
686 unsigned int j;
98994639 687
65ebb059 688 if (locwarn) { /* Output failure info only on the first one */
98994639
HS
689#ifdef LC_ALL
690
49c85077
KW
691 PerlIO_printf(Perl_error_log,
692 "perl: warning: Setting locale failed.\n");
98994639
HS
693
694#else /* !LC_ALL */
695
49c85077
KW
696 PerlIO_printf(Perl_error_log,
697 "perl: warning: Setting locale failed for the categories:\n\t");
98994639 698#ifdef USE_LOCALE_CTYPE
49c85077
KW
699 if (! curctype)
700 PerlIO_printf(Perl_error_log, "LC_CTYPE ");
98994639
HS
701#endif /* USE_LOCALE_CTYPE */
702#ifdef USE_LOCALE_COLLATE
49c85077
KW
703 if (! curcoll)
704 PerlIO_printf(Perl_error_log, "LC_COLLATE ");
98994639
HS
705#endif /* USE_LOCALE_COLLATE */
706#ifdef USE_LOCALE_NUMERIC
49c85077
KW
707 if (! curnum)
708 PerlIO_printf(Perl_error_log, "LC_NUMERIC ");
98994639 709#endif /* USE_LOCALE_NUMERIC */
a782673d 710 PerlIO_printf(Perl_error_log, "and possibly others\n");
98994639
HS
711
712#endif /* LC_ALL */
713
49c85077
KW
714 PerlIO_printf(Perl_error_log,
715 "perl: warning: Please check that your locale settings:\n");
98994639
HS
716
717#ifdef __GLIBC__
49c85077
KW
718 PerlIO_printf(Perl_error_log,
719 "\tLANGUAGE = %c%s%c,\n",
720 language ? '"' : '(',
721 language ? language : "unset",
722 language ? '"' : ')');
98994639
HS
723#endif
724
49c85077
KW
725 PerlIO_printf(Perl_error_log,
726 "\tLC_ALL = %c%s%c,\n",
727 lc_all ? '"' : '(',
728 lc_all ? lc_all : "unset",
729 lc_all ? '"' : ')');
98994639
HS
730
731#if defined(USE_ENVIRON_ARRAY)
49c85077
KW
732 {
733 char **e;
734 for (e = environ; *e; e++) {
735 if (strnEQ(*e, "LC_", 3)
736 && strnNE(*e, "LC_ALL=", 7)
737 && (p = strchr(*e, '=')))
738 PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
739 (int)(p - *e), *e, p + 1);
740 }
741 }
98994639 742#else
49c85077
KW
743 PerlIO_printf(Perl_error_log,
744 "\t(possibly more locale environment variables)\n");
98994639
HS
745#endif
746
49c85077
KW
747 PerlIO_printf(Perl_error_log,
748 "\tLANG = %c%s%c\n",
749 lang ? '"' : '(',
750 lang ? lang : "unset",
751 lang ? '"' : ')');
98994639 752
49c85077
KW
753 PerlIO_printf(Perl_error_log,
754 " are supported and installed on your system.\n");
755 }
98994639 756
65ebb059
KW
757 /* Calculate what fallback locales to try. We have avoided this
758 * until we have to, becuase failure is quite unlikely. This will
759 * usually change the upper bound of the loop we are in.
760 *
761 * Since the system's default way of setting the locale has not
762 * found one that works, We use Perl's defined ordering: LC_ALL,
763 * LANG, and the C locale. We don't try the same locale twice, so
764 * don't add to the list if already there. (On POSIX systems, the
765 * LC_ALL element will likely be a repeat of the 0th element "",
766 * but there's no harm done by doing it explicitly */
767 if (lc_all) {
768 for (j = 0; j < trial_locales_count; j++) {
769 if (strEQ(lc_all, trial_locales[j])) {
770 goto done_lc_all;
771 }
772 }
773 trial_locales[trial_locales_count++] = lc_all;
774 }
775 done_lc_all:
98994639 776
65ebb059
KW
777 if (lang) {
778 for (j = 0; j < trial_locales_count; j++) {
779 if (strEQ(lang, trial_locales[j])) {
780 goto done_lang;
781 }
782 }
783 trial_locales[trial_locales_count++] = lang;
784 }
785 done_lang:
786
787#if defined(WIN32) && defined(LC_ALL)
788 /* For Windows, we also try the system default locale before "C".
789 * (If there exists a Windows without LC_ALL we skip this because
790 * it gets too complicated. For those, the "C" is the next
791 * fallback possibility). The "" is the same as the 0th element of
792 * the array, but the code at the loop above knows to treat it
793 * differently when not the 0th */
794 trial_locales[trial_locales_count++] = "";
795#endif
796
797 for (j = 0; j < trial_locales_count; j++) {
798 if (strEQ("C", trial_locales[j])) {
799 goto done_C;
800 }
801 }
802 trial_locales[trial_locales_count++] = "C";
98994639 803
65ebb059
KW
804 done_C: ;
805 } /* end of first time through the loop */
98994639 806
65ebb059
KW
807#ifdef WIN32
808 next_iteration: ;
809#endif
810
811 } /* end of looping through the trial locales */
812
813 if (ok < 1) { /* If we tried to fallback */
814 const char* msg;
815 if (! setlocale_failure) { /* fallback succeeded */
816 msg = "Falling back to";
817 }
818 else { /* fallback failed */
98994639 819
65ebb059
KW
820 /* We dropped off the end of the loop, so have to decrement i to
821 * get back to the value the last time through */
822 i--;
98994639 823
65ebb059
KW
824 ok = -1;
825 msg = "Failed to fall back to";
826
827 /* To continue, we should use whatever values we've got */
98994639 828#ifdef USE_LOCALE_CTYPE
49c85077
KW
829 Safefree(curctype);
830 curctype = savepv(setlocale(LC_CTYPE, NULL));
98994639
HS
831#endif /* USE_LOCALE_CTYPE */
832#ifdef USE_LOCALE_COLLATE
49c85077
KW
833 Safefree(curcoll);
834 curcoll = savepv(setlocale(LC_COLLATE, NULL));
98994639
HS
835#endif /* USE_LOCALE_COLLATE */
836#ifdef USE_LOCALE_NUMERIC
49c85077
KW
837 Safefree(curnum);
838 curnum = savepv(setlocale(LC_NUMERIC, NULL));
98994639 839#endif /* USE_LOCALE_NUMERIC */
65ebb059
KW
840 }
841
842 if (locwarn) {
843 const char * description;
844 const char * name = "";
845 if (strEQ(trial_locales[i], "C")) {
846 description = "the standard locale";
847 name = "C";
848 }
849 else if (strEQ(trial_locales[i], "")) {
850 description = "the system default locale";
851 if (system_default_locale) {
852 name = system_default_locale;
853 }
854 }
855 else {
856 description = "a fallback locale";
857 name = trial_locales[i];
858 }
859 if (name && strNE(name, "")) {
860 PerlIO_printf(Perl_error_log,
861 "perl: warning: %s %s (\"%s\").\n", msg, description, name);
862 }
863 else {
864 PerlIO_printf(Perl_error_log,
865 "perl: warning: %s %s.\n", msg, description);
866 }
867 }
868 } /* End of tried to fallback */
98994639
HS
869
870#ifdef USE_LOCALE_CTYPE
871 new_ctype(curctype);
872#endif /* USE_LOCALE_CTYPE */
873
874#ifdef USE_LOCALE_COLLATE
875 new_collate(curcoll);
876#endif /* USE_LOCALE_COLLATE */
877
878#ifdef USE_LOCALE_NUMERIC
879 new_numeric(curnum);
880#endif /* USE_LOCALE_NUMERIC */
b310b053 881
8ef6e574 882#if defined(USE_PERLIO) && defined(USE_LOCALE_CTYPE)
49c85077
KW
883 /* Set PL_utf8locale to TRUE if using PerlIO _and_ the current LC_CTYPE
884 * locale is UTF-8. If PL_utf8locale and PL_unicode (set by -C or by
885 * $ENV{PERL_UNICODE}) are true, perl.c:S_parse_body() will turn on the
886 * PerlIO :utf8 layer on STDIN, STDOUT, STDERR, _and_ the default open
887 * discipline. */
888 PL_utf8locale = is_cur_LC_category_utf8(LC_CTYPE);
889
a05d7ebb 890 /* Set PL_unicode to $ENV{PERL_UNICODE} if using PerlIO.
fde18df1
JH
891 This is an alternative to using the -C command line switch
892 (the -C if present will override this). */
893 {
dd374669 894 const char *p = PerlEnv_getenv("PERL_UNICODE");
a05d7ebb 895 PL_unicode = p ? parse_unicode_opts(&p) : 0;
5a22a2bb
NC
896 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
897 PL_utf8cache = -1;
b310b053 898 }
ec71e770 899#endif
b310b053 900
98994639 901#ifdef USE_LOCALE_CTYPE
43c5f42d 902 Safefree(curctype);
98994639
HS
903#endif /* USE_LOCALE_CTYPE */
904#ifdef USE_LOCALE_COLLATE
43c5f42d 905 Safefree(curcoll);
98994639
HS
906#endif /* USE_LOCALE_COLLATE */
907#ifdef USE_LOCALE_NUMERIC
43c5f42d 908 Safefree(curnum);
98994639 909#endif /* USE_LOCALE_NUMERIC */
8ef6e574
KW
910
911#endif /* USE_LOCALE */
912
98994639
HS
913 return ok;
914}
915
49c85077 916
98994639
HS
917#ifdef USE_LOCALE_COLLATE
918
919/*
920 * mem_collxfrm() is a bit like strxfrm() but with two important
921 * differences. First, it handles embedded NULs. Second, it allocates
922 * a bit more memory than needed for the transformed data itself.
923 * The real transformed data begins at offset sizeof(collationix).
924 * Please see sv_collxfrm() to see how this is used.
925 */
166f8a29 926
98994639
HS
927char *
928Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen)
929{
97aff369 930 dVAR;
98994639
HS
931 char *xbuf;
932 STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
933
7918f24d
NC
934 PERL_ARGS_ASSERT_MEM_COLLXFRM;
935
98994639
HS
936 /* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
937 /* the +1 is for the terminating NUL. */
938
939 xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
a02a5408 940 Newx(xbuf, xAlloc, char);
98994639
HS
941 if (! xbuf)
942 goto bad;
943
944 *(U32*)xbuf = PL_collation_ix;
945 xout = sizeof(PL_collation_ix);
946 for (xin = 0; xin < len; ) {
224e8ef5 947 Size_t xused;
98994639
HS
948
949 for (;;) {
950 xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
224e8ef5 951 if (xused >= PERL_INT_MAX)
98994639 952 goto bad;
eb160463 953 if ((STRLEN)xused < xAlloc - xout)
98994639
HS
954 break;
955 xAlloc = (2 * xAlloc) + 1;
956 Renew(xbuf, xAlloc, char);
957 if (! xbuf)
958 goto bad;
959 }
960
961 xin += strlen(s + xin) + 1;
962 xout += xused;
963
964 /* Embedded NULs are understood but silently skipped
965 * because they make no sense in locale collation. */
966 }
967
968 xbuf[xout] = '\0';
969 *xlen = xout - sizeof(PL_collation_ix);
970 return xbuf;
971
972 bad:
973 Safefree(xbuf);
974 *xlen = 0;
975 return NULL;
976}
977
978#endif /* USE_LOCALE_COLLATE */
979
8ef6e574
KW
980#ifdef USE_LOCALE
981
637917bb 982STATIC bool
7d74bb61
KW
983S_is_cur_LC_category_utf8(pTHX_ int category)
984{
985 /* Returns TRUE if the current locale for 'category' is UTF-8; FALSE
986 * otherwise. 'category' may not be LC_ALL. If the platform doesn't have
119ee68b
KW
987 * nl_langinfo(), nor MB_CUR_MAX, this employs a heuristic, which hence
988 * could give the wrong result. It errs on the side of not being a UTF-8
989 * locale. */
7d74bb61
KW
990
991 char *save_input_locale = NULL;
7d74bb61
KW
992 STRLEN final_pos;
993
8ef6e574 994#ifdef LC_ALL
7d74bb61 995 assert(category != LC_ALL);
8ef6e574 996#endif
7d74bb61
KW
997
998 /* First dispose of the trivial cases */
b07fffd1 999 save_input_locale = setlocale(category, NULL);
7d74bb61 1000 if (! save_input_locale) {
69014004
KW
1001 DEBUG_L(PerlIO_printf(Perl_debug_log,
1002 "Could not find current locale for category %d\n",
1003 category));
7d74bb61
KW
1004 return FALSE; /* XXX maybe should croak */
1005 }
b07fffd1 1006 save_input_locale = stdize_locale(savepv(save_input_locale));
7d74bb61
KW
1007 if ((*save_input_locale == 'C' && save_input_locale[1] == '\0')
1008 || strEQ(save_input_locale, "POSIX"))
1009 {
69014004
KW
1010 DEBUG_L(PerlIO_printf(Perl_debug_log,
1011 "Current locale for category %d is %s\n",
1012 category, save_input_locale));
b07fffd1 1013 Safefree(save_input_locale);
7d74bb61
KW
1014 return FALSE;
1015 }
1016
1d958db2
KW
1017#if defined(USE_LOCALE_CTYPE) \
1018 && (defined(MB_CUR_MAX) || (defined(HAS_NL_LANGINFO) && defined(CODESET)))
7d74bb61 1019
1d958db2 1020 { /* Next try nl_langinfo or MB_CUR_MAX if available */
7d74bb61
KW
1021
1022 char *save_ctype_locale = NULL;
119ee68b 1023 bool is_utf8;
7d74bb61 1024
119ee68b 1025 if (category != LC_CTYPE) { /* These work only on LC_CTYPE */
7d74bb61
KW
1026
1027 /* Get the current LC_CTYPE locale */
1028 save_ctype_locale = stdize_locale(savepv(setlocale(LC_CTYPE, NULL)));
1029 if (! save_ctype_locale) {
69014004
KW
1030 DEBUG_L(PerlIO_printf(Perl_debug_log,
1031 "Could not find current locale for LC_CTYPE\n"));
7d74bb61
KW
1032 goto cant_use_nllanginfo;
1033 }
1034
1035 /* If LC_CTYPE and the desired category use the same locale, this
1036 * means that finding the value for LC_CTYPE is the same as finding
1037 * the value for the desired category. Otherwise, switch LC_CTYPE
1038 * to the desired category's locale */
1039 if (strEQ(save_ctype_locale, save_input_locale)) {
1040 Safefree(save_ctype_locale);
1041 save_ctype_locale = NULL;
1042 }
1043 else if (! setlocale(LC_CTYPE, save_input_locale)) {
69014004
KW
1044 DEBUG_L(PerlIO_printf(Perl_debug_log,
1045 "Could not change LC_CTYPE locale to %s\n",
1046 save_input_locale));
7d74bb61
KW
1047 Safefree(save_ctype_locale);
1048 goto cant_use_nllanginfo;
1049 }
1050 }
1051
69014004
KW
1052 DEBUG_L(PerlIO_printf(Perl_debug_log, "Current LC_CTYPE locale=%s\n",
1053 save_input_locale));
1054
7d74bb61 1055 /* Here the current LC_CTYPE is set to the locale of the category whose
1d958db2
KW
1056 * information is desired. This means that nl_langinfo() and MB_CUR_MAX
1057 * should give the correct results */
119ee68b 1058
1d958db2
KW
1059# if defined(HAS_NL_LANGINFO) && defined(CODESET)
1060 {
1061 char *codeset = savepv(nl_langinfo(CODESET));
1062 if (codeset && strNE(codeset, "")) {
119ee68b 1063
1d958db2
KW
1064 /* If we switched LC_CTYPE, switch back */
1065 if (save_ctype_locale) {
1066 setlocale(LC_CTYPE, save_ctype_locale);
1067 Safefree(save_ctype_locale);
1068 }
1069
1070 is_utf8 = foldEQ(codeset, STR_WITH_LEN("UTF-8"))
1071 || foldEQ(codeset, STR_WITH_LEN("UTF8"));
1072
69014004
KW
1073 DEBUG_L(PerlIO_printf(Perl_debug_log,
1074 "\tnllanginfo returned CODESET '%s'; ?UTF8 locale=%d\n",
1075 codeset, is_utf8));
1d958db2
KW
1076 Safefree(codeset);
1077 Safefree(save_input_locale);
1078 return is_utf8;
1079 }
119ee68b
KW
1080 }
1081
1d958db2
KW
1082# endif
1083# ifdef MB_CUR_MAX
1084
1085 /* Here, either we don't have nl_langinfo, or it didn't return a
1086 * codeset. Try MB_CUR_MAX */
1087
119ee68b
KW
1088 /* Standard UTF-8 needs at least 4 bytes to represent the maximum
1089 * Unicode code point. Since UTF-8 is the only non-single byte
1090 * encoding we handle, we just say any such encoding is UTF-8, and if
1091 * turns out to be wrong, other things will fail */
1092 is_utf8 = MB_CUR_MAX >= 4;
1093
69014004
KW
1094 DEBUG_L(PerlIO_printf(Perl_debug_log,
1095 "\tMB_CUR_MAX=%d; ?UTF8 locale=%d\n",
1096 (int) MB_CUR_MAX, is_utf8));
1097
119ee68b
KW
1098 Safefree(save_input_locale);
1099
1100# ifdef HAS_MBTOWC
1101
1102 /* ... But, most system that have MB_CUR_MAX will also have mbtowc(),
1103 * since they are both in the C99 standard. We can feed a known byte
1104 * string to the latter function, and check that it gives the expected
1105 * result */
1106 if (is_utf8) {
1107 wchar_t wc;
a6715020 1108 GCC_DIAG_IGNORE(-Wunused-result);
1d958db2 1109 (void) mbtowc(&wc, NULL, 0); /* Reset any shift state */
a6715020 1110 GCC_DIAG_RESTORE;
69014004 1111 errno = 0;
119ee68b
KW
1112 if (mbtowc(&wc, HYPHEN_UTF8, strlen(HYPHEN_UTF8))
1113 != strlen(HYPHEN_UTF8)
1114 || wc != (wchar_t) 0x2010)
1115 {
1116 is_utf8 = FALSE;
69014004
KW
1117 DEBUG_L(PerlIO_printf(Perl_debug_log, "\thyphen=U+%x\n", wc));
1118 DEBUG_L(PerlIO_printf(Perl_debug_log,
1119 "\treturn from mbtowc=%d; errno=%d; ?UTF8 locale=0\n",
1120 mbtowc(&wc, HYPHEN_UTF8, strlen(HYPHEN_UTF8)), errno));
119ee68b
KW
1121 }
1122 }
119ee68b
KW
1123# endif
1124
1d958db2
KW
1125 /* If we switched LC_CTYPE, switch back */
1126 if (save_ctype_locale) {
1127 setlocale(LC_CTYPE, save_ctype_locale);
1128 Safefree(save_ctype_locale);
119ee68b 1129 }
7d74bb61 1130
1d958db2 1131 return is_utf8;
119ee68b 1132# endif
7d74bb61 1133 }
119ee68b 1134
7d74bb61
KW
1135 cant_use_nllanginfo:
1136
1137#endif /* HAS_NL_LANGINFO etc */
1138
1139 /* nl_langinfo not available or failed somehow. Look at the locale name to
751e9426 1140 * see if it matches qr/UTF -? 8 /ix */
7d74bb61
KW
1141
1142 final_pos = strlen(save_input_locale) - 1;
751e9426
KW
1143 if (final_pos >= 3) {
1144 char *name = save_input_locale;
1145
1146 /* Find next 'U' or 'u' and look from there */
1147 while ((name += strcspn(name, "Uu") + 1)
1148 <= save_input_locale + final_pos - 2)
7d74bb61 1149 {
751e9426
KW
1150 if (toFOLD(*(name)) != 't'
1151 || toFOLD(*(name + 1)) != 'f')
1152 {
1153 continue;
1154 }
1155 name += 2;
1156 if (*(name) == '-') {
1157 if ((name > save_input_locale + final_pos - 1)) {
1158 break;
1159 }
1160 name++;
1161 }
1162 if (*(name) == '8') {
1163 Safefree(save_input_locale);
69014004
KW
1164 DEBUG_L(PerlIO_printf(Perl_debug_log,
1165 "Locale %s ends with UTF-8 in name\n",
1166 save_input_locale));
751e9426
KW
1167 return TRUE;
1168 }
7d74bb61 1169 }
69014004
KW
1170 DEBUG_L(PerlIO_printf(Perl_debug_log,
1171 "Locale %s doesn't end with UTF-8 in name\n",
1172 save_input_locale));
7d74bb61
KW
1173 }
1174
1175#ifdef WIN32
1176 /* http://msdn.microsoft.com/en-us/library/windows/desktop/dd317756.aspx */
1177 if (final_pos >= 4
1178 && *(save_input_locale + final_pos - 0) == '1'
1179 && *(save_input_locale + final_pos - 1) == '0'
1180 && *(save_input_locale + final_pos - 2) == '0'
1181 && *(save_input_locale + final_pos - 3) == '5'
1182 && *(save_input_locale + final_pos - 4) == '6')
1183 {
69014004
KW
1184 DEBUG_L(PerlIO_printf(Perl_debug_log,
1185 "Locale %s ends with 10056 in name, is UTF-8 locale\n",
1186 save_input_locale));
d37662c0 1187 Safefree(save_input_locale);
7d74bb61
KW
1188 return TRUE;
1189 }
1190#endif
1191
fa9b773e
KW
1192 /* Other common encodings are the ISO 8859 series, which aren't UTF-8 */
1193 if (instr(save_input_locale, "8859")) {
69014004
KW
1194 DEBUG_L(PerlIO_printf(Perl_debug_log,
1195 "Locale %s has 8859 in name, not UTF-8 locale\n",
1196 save_input_locale));
d37662c0 1197 Safefree(save_input_locale);
fa9b773e
KW
1198 return FALSE;
1199 }
1200
1201#ifdef HAS_LOCALECONV
1202
1203# ifdef USE_LOCALE_MONETARY
1204
1205 /* Here, there is nothing in the locale name to indicate whether the locale
1206 * is UTF-8 or not. This "name", the return of setlocale(), is actually
1207 * defined to be opaque, so we can't really rely on the absence of various
1208 * substrings in the name to indicate its UTF-8ness. Look at the locale's
1209 * currency symbol. Often that will be in the native script, and if the
1210 * symbol isn't in UTF-8, we know that the locale isn't. If it is
1211 * non-ASCII UTF-8, we infer that the locale is too.
1212 * To do this, like above for LC_CTYPE, we first set LC_MONETARY to the
1213 * locale of the desired category, if it isn't that locale already */
1214
1215 {
1216 char *save_monetary_locale = NULL;
1217 bool illegal_utf8 = FALSE;
1218 bool only_ascii = FALSE;
1219 const struct lconv* const lc = localeconv();
1220
1221 if (category != LC_MONETARY) {
1222
1223 save_monetary_locale = stdize_locale(savepv(setlocale(LC_MONETARY,
1224 NULL)));
1225 if (! save_monetary_locale) {
69014004
KW
1226 DEBUG_L(PerlIO_printf(Perl_debug_log,
1227 "Could not find current locale for LC_MONETARY\n"));
fa9b773e
KW
1228 goto cant_use_monetary;
1229 }
1230
1231 if (strNE(save_monetary_locale, save_input_locale)) {
1232 if (! setlocale(LC_MONETARY, save_input_locale)) {
69014004
KW
1233 DEBUG_L(PerlIO_printf(Perl_debug_log,
1234 "Could not change LC_MONETARY locale to %s\n",
1235 save_input_locale));
fa9b773e
KW
1236 Safefree(save_monetary_locale);
1237 goto cant_use_monetary;
1238 }
1239 }
1240 }
1241
1242 /* Here the current LC_MONETARY is set to the locale of the category
1243 * whose information is desired. */
1244
1245 if (lc && lc->currency_symbol) {
1246 if (! is_utf8_string((U8 *) lc->currency_symbol, 0)) {
69014004
KW
1247 DEBUG_L(PerlIO_printf(Perl_debug_log,
1248 "Currency symbol for %s is not legal UTF-8\n",
1249 save_input_locale));
fa9b773e
KW
1250 illegal_utf8 = TRUE;
1251 }
1252 else if (is_ascii_string((U8 *) lc->currency_symbol, 0)) {
69014004 1253 DEBUG_L(PerlIO_printf(Perl_debug_log, "Currency symbol for %s contains only ASCII; can't use for determining if UTF-8 locale\n", save_input_locale));
fa9b773e
KW
1254 only_ascii = TRUE;
1255 }
1256 }
1257
1258 /* If we changed it, restore LC_MONETARY to its original locale */
1259 if (save_monetary_locale) {
1260 setlocale(LC_MONETARY, save_monetary_locale);
1261 Safefree(save_monetary_locale);
1262 }
1263
1264 Safefree(save_input_locale);
1265
1266 /* It isn't a UTF-8 locale if the symbol is not legal UTF-8; otherwise
1267 * assume the locale is UTF-8 if and only if the symbol is non-ascii
1268 * UTF-8. (We can't really tell if the locale is UTF-8 or not if the
1269 * symbol is just a '$', so we err on the side of it not being UTF-8)
1270 * */
69014004
KW
1271 DEBUG_L(PerlIO_printf(Perl_debug_log, "\tis_utf8=%d\n", (illegal_utf8)
1272 ? FALSE
1273 : ! only_ascii));
fa9b773e
KW
1274 return (illegal_utf8)
1275 ? FALSE
1276 : ! only_ascii;
1277
1278 }
1279 cant_use_monetary:
1280
1281# endif /* USE_LOCALE_MONETARY */
1282#endif /* HAS_LOCALECONV */
1283
1284#if 0 && defined(HAS_STRERROR) && defined(USE_LOCALE_MESSAGES)
1285
1286/* This code is ifdefd out because it was found to not be necessary in testing
1287 * on our dromedary test machine, which has over 700 locales. There, looking
1288 * at just the currency symbol gave essentially the same results as doing this
1289 * extra work. Executing this also caused segfaults in miniperl. I left it in
1290 * so as to avoid rewriting it if real-world experience indicates that
1291 * dromedary is an outlier. Essentially, instead of returning abpve if we
1292 * haven't found illegal utf8, we continue on and examine all the strerror()
1293 * messages on the platform for utf8ness. If all are ASCII, we still don't
1294 * know the answer; but otherwise we have a pretty good indication of the
1295 * utf8ness. The reason this doesn't necessarily help much is that the
1296 * messages may not have been translated into the locale. The currency symbol
1297 * is much more likely to have been translated. The code below would need to
1298 * be altered somewhat to just be a continuation of testing the currency
1299 * symbol. */
1300 int e;
1301 unsigned int failures = 0, non_ascii = 0;
1302 char *save_messages_locale = NULL;
1303
1304 /* Like above for LC_CTYPE, we set LC_MESSAGES to the locale of the
1305 * desired category, if it isn't that locale already */
1306
1307 if (category != LC_MESSAGES) {
1308
1309 save_messages_locale = stdize_locale(savepv(setlocale(LC_MESSAGES,
1310 NULL)));
1311 if (! save_messages_locale) {
1312 goto cant_use_messages;
1313 }
1314
1315 if (strEQ(save_messages_locale, save_input_locale)) {
1316 Safefree(save_input_locale);
1317 }
1318 else if (! setlocale(LC_MESSAGES, save_input_locale)) {
1319 Safefree(save_messages_locale);
1320 goto cant_use_messages;
1321 }
1322 }
1323
1324 /* Here the current LC_MESSAGES is set to the locale of the category
1325 * whose information is desired. Look through all the messages */
1326
1327 for (e = 0;
1328#ifdef HAS_SYS_ERRLIST
1329 e <= sys_nerr
1330#endif
1331 ; e++)
1332 {
1333 const U8* const errmsg = (U8 *) Strerror(e) ;
1334 if (!errmsg)
1335 break;
1336 if (! is_utf8_string(errmsg, 0)) {
1337 failures++;
1338 break;
1339 }
1340 else if (! is_ascii_string(errmsg, 0)) {
1341 non_ascii++;
1342 }
1343 }
1344
1345 /* And, if we changed it, restore LC_MESSAGES to its original locale */
1346 if (save_messages_locale) {
1347 setlocale(LC_MESSAGES, save_messages_locale);
1348 Safefree(save_messages_locale);
1349 }
1350
1351 /* Any non-UTF-8 message means not a UTF-8 locale; if all are valid,
1352 * any non-ascii means it is one; otherwise we assume it isn't */
1353 return (failures) ? FALSE : non_ascii;
1354
1355 }
1356 cant_use_messages:
1357
1358#endif
1359
69014004
KW
1360 DEBUG_L(PerlIO_printf(Perl_debug_log,
1361 "Assuming locale %s is not a UTF-8 locale\n",
1362 save_input_locale));
fa9b773e 1363 Safefree(save_input_locale);
7d74bb61
KW
1364 return FALSE;
1365}
1366
8ef6e574 1367#endif
7d74bb61 1368
66610fdd
RGS
1369/*
1370 * Local variables:
1371 * c-indentation-style: bsd
1372 * c-basic-offset: 4
14d04a33 1373 * indent-tabs-mode: nil
66610fdd
RGS
1374 * End:
1375 *
14d04a33 1376 * ex: set ts=8 sts=4 sw=4 et:
37442d52 1377 */