3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2005, 2006, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * A Elbereth Gilthoniel,
13 * silivren penna míriel
14 * o menel aglar elenath!
15 * Na-chaered palan-díriel
16 * o galadhremmin ennorath,
17 * Fanuilos, le linnathon
18 * nef aear, si nef aearon!
21 /* utility functions for handling locale-specific stuff like what
22 * character represents the decimal point.
26 #define PERL_IN_LOCALE_C
34 # include <langinfo.h>
39 #if defined(USE_LOCALE_NUMERIC) || defined(USE_LOCALE_COLLATE)
41 * Standardize the locale name from a string returned by 'setlocale'.
43 * The standard return value of setlocale() is either
44 * (1) "xx_YY" if the first argument of setlocale() is not LC_ALL
45 * (2) "xa_YY xb_YY ..." if the first argument of setlocale() is LC_ALL
46 * (the space-separated values represent the various sublocales,
47 * in some unspecificed order)
49 * In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n",
50 * which is harmful for further use of the string in setlocale().
54 S_stdize_locale(pTHX_ char *locs)
56 const char * const s = strchr(locs, '=');
60 const char * const t = strchr(s, '.');
63 const char * const u = strchr(t, '\n');
64 if (u && (u[1] == 0)) {
65 const STRLEN len = u - s;
66 Move(s + 1, locs, len, char);
74 Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs);
81 Perl_set_numeric_radix(pTHX)
83 #ifdef USE_LOCALE_NUMERIC
84 # ifdef HAS_LOCALECONV
85 const struct lconv* const lc = localeconv();
87 if (lc && lc->decimal_point) {
88 if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) {
89 SvREFCNT_dec(PL_numeric_radix_sv);
90 PL_numeric_radix_sv = Nullsv;
93 if (PL_numeric_radix_sv)
94 sv_setpv(PL_numeric_radix_sv, lc->decimal_point);
96 PL_numeric_radix_sv = newSVpv(lc->decimal_point, 0);
100 PL_numeric_radix_sv = Nullsv;
101 # endif /* HAS_LOCALECONV */
102 #endif /* USE_LOCALE_NUMERIC */
106 * Set up for a new numeric locale.
109 Perl_new_numeric(pTHX_ const char *newnum)
111 #ifdef USE_LOCALE_NUMERIC
114 Safefree(PL_numeric_name);
115 PL_numeric_name = NULL;
116 PL_numeric_standard = TRUE;
117 PL_numeric_local = TRUE;
121 if (! PL_numeric_name || strNE(PL_numeric_name, newnum)) {
122 Safefree(PL_numeric_name);
123 PL_numeric_name = stdize_locale(savepv(newnum));
124 PL_numeric_standard = ((*newnum == 'C' && newnum[1] == '\0')
125 || strEQ(newnum, "POSIX"));
126 PL_numeric_local = TRUE;
130 #endif /* USE_LOCALE_NUMERIC */
134 Perl_set_numeric_standard(pTHX)
136 #ifdef USE_LOCALE_NUMERIC
138 if (! PL_numeric_standard) {
139 setlocale(LC_NUMERIC, "C");
140 PL_numeric_standard = TRUE;
141 PL_numeric_local = FALSE;
145 #endif /* USE_LOCALE_NUMERIC */
149 Perl_set_numeric_local(pTHX)
151 #ifdef USE_LOCALE_NUMERIC
153 if (! PL_numeric_local) {
154 setlocale(LC_NUMERIC, PL_numeric_name);
155 PL_numeric_standard = FALSE;
156 PL_numeric_local = TRUE;
160 #endif /* USE_LOCALE_NUMERIC */
164 * Set up for a new ctype locale.
167 Perl_new_ctype(pTHX_ const char *newctype)
169 #ifdef USE_LOCALE_CTYPE
173 for (i = 0; i < 256; i++) {
175 PL_fold_locale[i] = toLOWER_LC(i);
176 else if (isLOWER_LC(i))
177 PL_fold_locale[i] = toUPPER_LC(i);
179 PL_fold_locale[i] = i;
182 #endif /* USE_LOCALE_CTYPE */
183 PERL_UNUSED_ARG(newctype);
187 * Set up for a new collation locale.
190 Perl_new_collate(pTHX_ const char *newcoll)
192 #ifdef USE_LOCALE_COLLATE
195 if (PL_collation_name) {
197 Safefree(PL_collation_name);
198 PL_collation_name = NULL;
200 PL_collation_standard = TRUE;
201 PL_collxfrm_base = 0;
202 PL_collxfrm_mult = 2;
206 if (! PL_collation_name || strNE(PL_collation_name, newcoll)) {
208 Safefree(PL_collation_name);
209 PL_collation_name = stdize_locale(savepv(newcoll));
210 PL_collation_standard = ((*newcoll == 'C' && newcoll[1] == '\0')
211 || strEQ(newcoll, "POSIX"));
214 /* 2: at most so many chars ('a', 'b'). */
215 /* 50: surely no system expands a char more. */
216 #define XFRMBUFSIZE (2 * 50)
217 char xbuf[XFRMBUFSIZE];
218 const Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
219 const Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
220 const SSize_t mult = fb - fa;
222 Perl_croak(aTHX_ "strxfrm() gets absurd");
223 PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0;
224 PL_collxfrm_mult = mult;
228 #endif /* USE_LOCALE_COLLATE */
232 * Initialize locale awareness.
235 Perl_init_i18nl10n(pTHX_ int printwarn)
239 * 1 = set ok or not applicable,
240 * 0 = fallback to C locale,
241 * -1 = fallback to C locale failed
244 #if defined(USE_LOCALE)
246 #ifdef USE_LOCALE_CTYPE
247 char *curctype = NULL;
248 #endif /* USE_LOCALE_CTYPE */
249 #ifdef USE_LOCALE_COLLATE
250 char *curcoll = NULL;
251 #endif /* USE_LOCALE_COLLATE */
252 #ifdef USE_LOCALE_NUMERIC
254 #endif /* USE_LOCALE_NUMERIC */
256 char * const language = PerlEnv_getenv("LANGUAGE");
258 char * const lc_all = PerlEnv_getenv("LC_ALL");
259 char * const lang = PerlEnv_getenv("LANG");
260 bool setlocale_failure = FALSE;
262 #ifdef LOCALE_ENVIRON_REQUIRED
265 * Ultrix setlocale(..., "") fails if there are no environment
266 * variables from which to get a locale name.
273 if (setlocale(LC_ALL, ""))
276 setlocale_failure = TRUE;
278 if (!setlocale_failure) {
279 #ifdef USE_LOCALE_CTYPE
282 (!done && (lang || PerlEnv_getenv("LC_CTYPE")))
284 setlocale_failure = TRUE;
286 curctype = savepv(curctype);
287 #endif /* USE_LOCALE_CTYPE */
288 #ifdef USE_LOCALE_COLLATE
290 setlocale(LC_COLLATE,
291 (!done && (lang || PerlEnv_getenv("LC_COLLATE")))
293 setlocale_failure = TRUE;
295 curcoll = savepv(curcoll);
296 #endif /* USE_LOCALE_COLLATE */
297 #ifdef USE_LOCALE_NUMERIC
299 setlocale(LC_NUMERIC,
300 (!done && (lang || PerlEnv_getenv("LC_NUMERIC")))
302 setlocale_failure = TRUE;
304 curnum = savepv(curnum);
305 #endif /* USE_LOCALE_NUMERIC */
310 #endif /* !LOCALE_ENVIRON_REQUIRED */
313 if (! setlocale(LC_ALL, ""))
314 setlocale_failure = TRUE;
317 if (!setlocale_failure) {
318 #ifdef USE_LOCALE_CTYPE
319 if (! (curctype = setlocale(LC_CTYPE, "")))
320 setlocale_failure = TRUE;
322 curctype = savepv(curctype);
323 #endif /* USE_LOCALE_CTYPE */
324 #ifdef USE_LOCALE_COLLATE
325 if (! (curcoll = setlocale(LC_COLLATE, "")))
326 setlocale_failure = TRUE;
328 curcoll = savepv(curcoll);
329 #endif /* USE_LOCALE_COLLATE */
330 #ifdef USE_LOCALE_NUMERIC
331 if (! (curnum = setlocale(LC_NUMERIC, "")))
332 setlocale_failure = TRUE;
334 curnum = savepv(curnum);
335 #endif /* USE_LOCALE_NUMERIC */
338 if (setlocale_failure) {
340 const bool locwarn = (printwarn > 1 ||
342 (!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p))));
347 PerlIO_printf(Perl_error_log,
348 "perl: warning: Setting locale failed.\n");
352 PerlIO_printf(Perl_error_log,
353 "perl: warning: Setting locale failed for the categories:\n\t");
354 #ifdef USE_LOCALE_CTYPE
356 PerlIO_printf(Perl_error_log, "LC_CTYPE ");
357 #endif /* USE_LOCALE_CTYPE */
358 #ifdef USE_LOCALE_COLLATE
360 PerlIO_printf(Perl_error_log, "LC_COLLATE ");
361 #endif /* USE_LOCALE_COLLATE */
362 #ifdef USE_LOCALE_NUMERIC
364 PerlIO_printf(Perl_error_log, "LC_NUMERIC ");
365 #endif /* USE_LOCALE_NUMERIC */
366 PerlIO_printf(Perl_error_log, "\n");
370 PerlIO_printf(Perl_error_log,
371 "perl: warning: Please check that your locale settings:\n");
374 PerlIO_printf(Perl_error_log,
375 "\tLANGUAGE = %c%s%c,\n",
376 language ? '"' : '(',
377 language ? language : "unset",
378 language ? '"' : ')');
381 PerlIO_printf(Perl_error_log,
382 "\tLC_ALL = %c%s%c,\n",
384 lc_all ? lc_all : "unset",
387 #if defined(USE_ENVIRON_ARRAY)
390 for (e = environ; *e; e++) {
391 if (strnEQ(*e, "LC_", 3)
392 && strnNE(*e, "LC_ALL=", 7)
393 && (p = strchr(*e, '=')))
394 PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
395 (int)(p - *e), *e, p + 1);
399 PerlIO_printf(Perl_error_log,
400 "\t(possibly more locale environment variables)\n");
403 PerlIO_printf(Perl_error_log,
406 lang ? lang : "unset",
409 PerlIO_printf(Perl_error_log,
410 " are supported and installed on your system.\n");
415 if (setlocale(LC_ALL, "C")) {
417 PerlIO_printf(Perl_error_log,
418 "perl: warning: Falling back to the standard locale (\"C\").\n");
423 PerlIO_printf(Perl_error_log,
424 "perl: warning: Failed to fall back to the standard locale (\"C\").\n");
431 #ifdef USE_LOCALE_CTYPE
432 || !(curctype || setlocale(LC_CTYPE, "C"))
433 #endif /* USE_LOCALE_CTYPE */
434 #ifdef USE_LOCALE_COLLATE
435 || !(curcoll || setlocale(LC_COLLATE, "C"))
436 #endif /* USE_LOCALE_COLLATE */
437 #ifdef USE_LOCALE_NUMERIC
438 || !(curnum || setlocale(LC_NUMERIC, "C"))
439 #endif /* USE_LOCALE_NUMERIC */
443 PerlIO_printf(Perl_error_log,
444 "perl: warning: Cannot fall back to the standard locale (\"C\").\n");
448 #endif /* ! LC_ALL */
450 #ifdef USE_LOCALE_CTYPE
451 curctype = savepv(setlocale(LC_CTYPE, Nullch));
452 #endif /* USE_LOCALE_CTYPE */
453 #ifdef USE_LOCALE_COLLATE
454 curcoll = savepv(setlocale(LC_COLLATE, Nullch));
455 #endif /* USE_LOCALE_COLLATE */
456 #ifdef USE_LOCALE_NUMERIC
457 curnum = savepv(setlocale(LC_NUMERIC, Nullch));
458 #endif /* USE_LOCALE_NUMERIC */
462 #ifdef USE_LOCALE_CTYPE
464 #endif /* USE_LOCALE_CTYPE */
466 #ifdef USE_LOCALE_COLLATE
467 new_collate(curcoll);
468 #endif /* USE_LOCALE_COLLATE */
470 #ifdef USE_LOCALE_NUMERIC
472 #endif /* USE_LOCALE_NUMERIC */
476 #endif /* USE_LOCALE */
480 /* Set PL_utf8locale to TRUE if using PerlIO _and_
481 any of the following are true:
482 - nl_langinfo(CODESET) contains /^utf-?8/i
483 - $ENV{LC_ALL} contains /^utf-?8/i
484 - $ENV{LC_CTYPE} contains /^utf-?8/i
485 - $ENV{LANG} contains /^utf-?8/i
486 The LC_ALL, LC_CTYPE, LANG obey the usual override
487 hierarchy of locale environment variables. (LANGUAGE
488 affects only LC_MESSAGES only under glibc.) (If present,
489 it overrides LC_MESSAGES for GNU gettext, and it also
490 can have more than one locale, separated by spaces,
491 in case you need to know.)
492 If PL_utf8locale and PL_unicode (set by -C or by $ENV{PERL_UNICODE})
493 are true, perl.c:S_parse_body() will turn on the PerlIO :utf8 layer
494 on STDIN, STDOUT, STDERR, _and_ the default open discipline.
496 bool utf8locale = FALSE;
497 char *codeset = NULL;
498 #if defined(HAS_NL_LANGINFO) && defined(CODESET)
499 codeset = nl_langinfo(CODESET);
502 utf8locale = (Perl_ibcmp(aTHX_ codeset, STR_WITH_LEN("UTF-8")) == 0 ||
503 Perl_ibcmp(aTHX_ codeset, STR_WITH_LEN("UTF8") ) == 0);
504 #if defined(USE_LOCALE)
505 else { /* nl_langinfo(CODESET) is supposed to correctly
506 * interpret the locale environment variables,
507 * but just in case it fails, let's do this manually. */
509 utf8locale = (Perl_ibcmp(aTHX_ lang, STR_WITH_LEN("UTF-8")) == 0 ||
510 Perl_ibcmp(aTHX_ lang, STR_WITH_LEN("UTF8") ) == 0);
511 #ifdef USE_LOCALE_CTYPE
513 utf8locale = (Perl_ibcmp(aTHX_ curctype, STR_WITH_LEN("UTF-8")) == 0 ||
514 Perl_ibcmp(aTHX_ curctype, STR_WITH_LEN("UTF8") ) == 0);
517 utf8locale = (Perl_ibcmp(aTHX_ lc_all, STR_WITH_LEN("UTF-8")) == 0 ||
518 Perl_ibcmp(aTHX_ lc_all, STR_WITH_LEN("UTF8") ) == 0);
520 #endif /* USE_LOCALE */
522 PL_utf8locale = TRUE;
524 /* Set PL_unicode to $ENV{PERL_UNICODE} if using PerlIO.
525 This is an alternative to using the -C command line switch
526 (the -C if present will override this). */
528 const char *p = PerlEnv_getenv("PERL_UNICODE");
529 PL_unicode = p ? parse_unicode_opts(&p) : 0;
533 #ifdef USE_LOCALE_CTYPE
535 #endif /* USE_LOCALE_CTYPE */
536 #ifdef USE_LOCALE_COLLATE
538 #endif /* USE_LOCALE_COLLATE */
539 #ifdef USE_LOCALE_NUMERIC
541 #endif /* USE_LOCALE_NUMERIC */
545 #ifdef USE_LOCALE_COLLATE
548 * mem_collxfrm() is a bit like strxfrm() but with two important
549 * differences. First, it handles embedded NULs. Second, it allocates
550 * a bit more memory than needed for the transformed data itself.
551 * The real transformed data begins at offset sizeof(collationix).
552 * Please see sv_collxfrm() to see how this is used.
556 Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen)
559 STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
561 /* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
562 /* the +1 is for the terminating NUL. */
564 xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
565 Newx(xbuf, xAlloc, char);
569 *(U32*)xbuf = PL_collation_ix;
570 xout = sizeof(PL_collation_ix);
571 for (xin = 0; xin < len; ) {
575 xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
578 if ((STRLEN)xused < xAlloc - xout)
580 xAlloc = (2 * xAlloc) + 1;
581 Renew(xbuf, xAlloc, char);
586 xin += strlen(s + xin) + 1;
589 /* Embedded NULs are understood but silently skipped
590 * because they make no sense in locale collation. */
594 *xlen = xout - sizeof(PL_collation_ix);
603 #endif /* USE_LOCALE_COLLATE */
607 * c-indentation-style: bsd
609 * indent-tabs-mode: t
612 * ex: set ts=8 sts=4 sw=4 noet: