Commit | Line | Data |
98994639 |
1 | /* locale.c |
2 | * |
4bb101f2 |
3 | * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
770526c1 |
4 | * 2000, 2001, 2002, 2003, 2005, by Larry Wall and others |
98994639 |
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 | /* |
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 | |
166f8a29 |
21 | /* utility functions for handling locale-specific stuff like what |
22 | * character represents the decimal point. |
23 | */ |
24 | |
98994639 |
25 | #include "EXTERN.h" |
26 | #define PERL_IN_LOCALE_C |
27 | #include "perl.h" |
28 | |
29 | #ifdef I_LOCALE |
30 | # include <locale.h> |
31 | #endif |
32 | |
b310b053 |
33 | #ifdef I_LANGINFO |
34 | # include <langinfo.h> |
35 | #endif |
36 | |
a4af207c |
37 | #include "reentr.h" |
38 | |
27da23d5 |
39 | #if defined(USE_LOCALE_NUMERIC) || defined(USE_LOCALE_COLLATE) |
98994639 |
40 | /* |
41 | * Standardize the locale name from a string returned by 'setlocale'. |
42 | * |
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) |
48 | * |
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(). |
51 | * |
52 | */ |
53 | STATIC char * |
54 | S_stdize_locale(pTHX_ char *locs) |
55 | { |
56 | char *s; |
57 | bool okay = TRUE; |
58 | |
59 | if ((s = strchr(locs, '='))) { |
60 | char *t; |
61 | |
62 | okay = FALSE; |
63 | if ((t = strchr(s, '.'))) { |
64 | char *u; |
65 | |
66 | if ((u = strchr(t, '\n'))) { |
67 | |
68 | if (u[1] == 0) { |
69 | STRLEN len = u - s; |
70 | Move(s + 1, locs, len, char); |
71 | locs[len] = 0; |
72 | okay = TRUE; |
73 | } |
74 | } |
75 | } |
76 | } |
77 | |
78 | if (!okay) |
79 | Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs); |
80 | |
81 | return locs; |
82 | } |
27da23d5 |
83 | #endif |
98994639 |
84 | |
85 | void |
86 | Perl_set_numeric_radix(pTHX) |
87 | { |
88 | #ifdef USE_LOCALE_NUMERIC |
89 | # ifdef HAS_LOCALECONV |
90 | struct lconv* lc; |
91 | |
92 | lc = localeconv(); |
93 | if (lc && lc->decimal_point) { |
94 | if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) { |
95 | SvREFCNT_dec(PL_numeric_radix_sv); |
96 | PL_numeric_radix_sv = Nullsv; |
97 | } |
98 | else { |
99 | if (PL_numeric_radix_sv) |
100 | sv_setpv(PL_numeric_radix_sv, lc->decimal_point); |
101 | else |
102 | PL_numeric_radix_sv = newSVpv(lc->decimal_point, 0); |
103 | } |
104 | } |
105 | else |
106 | PL_numeric_radix_sv = Nullsv; |
107 | # endif /* HAS_LOCALECONV */ |
108 | #endif /* USE_LOCALE_NUMERIC */ |
109 | } |
110 | |
111 | /* |
112 | * Set up for a new numeric locale. |
113 | */ |
114 | void |
115 | Perl_new_numeric(pTHX_ char *newnum) |
116 | { |
117 | #ifdef USE_LOCALE_NUMERIC |
118 | |
119 | if (! newnum) { |
120 | if (PL_numeric_name) { |
121 | Safefree(PL_numeric_name); |
122 | PL_numeric_name = NULL; |
123 | } |
124 | PL_numeric_standard = TRUE; |
125 | PL_numeric_local = TRUE; |
126 | return; |
127 | } |
128 | |
129 | if (! PL_numeric_name || strNE(PL_numeric_name, newnum)) { |
130 | Safefree(PL_numeric_name); |
131 | PL_numeric_name = stdize_locale(savepv(newnum)); |
770526c1 |
132 | PL_numeric_standard = ((*newnum == 'C' && newnum[1] == '\0') |
133 | || strEQ(newnum, "POSIX")); |
98994639 |
134 | PL_numeric_local = TRUE; |
135 | set_numeric_radix(); |
136 | } |
137 | |
138 | #endif /* USE_LOCALE_NUMERIC */ |
139 | } |
140 | |
141 | void |
142 | Perl_set_numeric_standard(pTHX) |
143 | { |
144 | #ifdef USE_LOCALE_NUMERIC |
145 | |
146 | if (! PL_numeric_standard) { |
147 | setlocale(LC_NUMERIC, "C"); |
148 | PL_numeric_standard = TRUE; |
149 | PL_numeric_local = FALSE; |
150 | set_numeric_radix(); |
151 | } |
152 | |
153 | #endif /* USE_LOCALE_NUMERIC */ |
154 | } |
155 | |
156 | void |
157 | Perl_set_numeric_local(pTHX) |
158 | { |
159 | #ifdef USE_LOCALE_NUMERIC |
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 | */ |
174 | void |
175 | Perl_new_ctype(pTHX_ char *newctype) |
176 | { |
177 | #ifdef USE_LOCALE_CTYPE |
27da23d5 |
178 | dVAR; |
98994639 |
179 | int i; |
180 | |
181 | for (i = 0; i < 256; i++) { |
182 | if (isUPPER_LC(i)) |
183 | PL_fold_locale[i] = toLOWER_LC(i); |
184 | else if (isLOWER_LC(i)) |
185 | PL_fold_locale[i] = toUPPER_LC(i); |
186 | else |
187 | PL_fold_locale[i] = i; |
188 | } |
189 | |
190 | #endif /* USE_LOCALE_CTYPE */ |
dd374669 |
191 | (void)newctype; |
98994639 |
192 | } |
193 | |
194 | /* |
195 | * Set up for a new collation locale. |
196 | */ |
197 | void |
198 | Perl_new_collate(pTHX_ char *newcoll) |
199 | { |
200 | #ifdef USE_LOCALE_COLLATE |
201 | |
202 | if (! newcoll) { |
203 | if (PL_collation_name) { |
204 | ++PL_collation_ix; |
205 | Safefree(PL_collation_name); |
206 | PL_collation_name = NULL; |
207 | } |
208 | PL_collation_standard = TRUE; |
209 | PL_collxfrm_base = 0; |
210 | PL_collxfrm_mult = 2; |
211 | return; |
212 | } |
213 | |
214 | if (! PL_collation_name || strNE(PL_collation_name, newcoll)) { |
215 | ++PL_collation_ix; |
216 | Safefree(PL_collation_name); |
217 | PL_collation_name = stdize_locale(savepv(newcoll)); |
770526c1 |
218 | PL_collation_standard = ((*newcoll == 'C' && newcoll[1] == '\0') |
219 | || strEQ(newcoll, "POSIX")); |
98994639 |
220 | |
221 | { |
222 | /* 2: at most so many chars ('a', 'b'). */ |
223 | /* 50: surely no system expands a char more. */ |
224 | #define XFRMBUFSIZE (2 * 50) |
225 | char xbuf[XFRMBUFSIZE]; |
226 | Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE); |
227 | Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE); |
228 | SSize_t mult = fb - fa; |
229 | if (mult < 1) |
230 | Perl_croak(aTHX_ "strxfrm() gets absurd"); |
eb160463 |
231 | PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0; |
98994639 |
232 | PL_collxfrm_mult = mult; |
233 | } |
234 | } |
235 | |
236 | #endif /* USE_LOCALE_COLLATE */ |
237 | } |
238 | |
239 | /* |
240 | * Initialize locale awareness. |
241 | */ |
242 | int |
243 | Perl_init_i18nl10n(pTHX_ int printwarn) |
244 | { |
245 | int ok = 1; |
246 | /* returns |
247 | * 1 = set ok or not applicable, |
248 | * 0 = fallback to C locale, |
249 | * -1 = fallback to C locale failed |
250 | */ |
251 | |
252 | #if defined(USE_LOCALE) |
253 | |
254 | #ifdef USE_LOCALE_CTYPE |
255 | char *curctype = NULL; |
256 | #endif /* USE_LOCALE_CTYPE */ |
257 | #ifdef USE_LOCALE_COLLATE |
258 | char *curcoll = NULL; |
259 | #endif /* USE_LOCALE_COLLATE */ |
260 | #ifdef USE_LOCALE_NUMERIC |
261 | char *curnum = NULL; |
262 | #endif /* USE_LOCALE_NUMERIC */ |
263 | #ifdef __GLIBC__ |
264 | char *language = PerlEnv_getenv("LANGUAGE"); |
265 | #endif |
266 | char *lc_all = PerlEnv_getenv("LC_ALL"); |
267 | char *lang = PerlEnv_getenv("LANG"); |
268 | bool setlocale_failure = FALSE; |
269 | |
270 | #ifdef LOCALE_ENVIRON_REQUIRED |
271 | |
272 | /* |
273 | * Ultrix setlocale(..., "") fails if there are no environment |
274 | * variables from which to get a locale name. |
275 | */ |
276 | |
277 | bool done = FALSE; |
278 | |
279 | #ifdef LC_ALL |
280 | if (lang) { |
281 | if (setlocale(LC_ALL, "")) |
282 | done = TRUE; |
283 | else |
284 | setlocale_failure = TRUE; |
285 | } |
286 | if (!setlocale_failure) { |
287 | #ifdef USE_LOCALE_CTYPE |
288 | if (! (curctype = |
289 | setlocale(LC_CTYPE, |
290 | (!done && (lang || PerlEnv_getenv("LC_CTYPE"))) |
291 | ? "" : Nullch))) |
292 | setlocale_failure = TRUE; |
293 | else |
294 | curctype = savepv(curctype); |
295 | #endif /* USE_LOCALE_CTYPE */ |
296 | #ifdef USE_LOCALE_COLLATE |
297 | if (! (curcoll = |
298 | setlocale(LC_COLLATE, |
299 | (!done && (lang || PerlEnv_getenv("LC_COLLATE"))) |
300 | ? "" : Nullch))) |
301 | setlocale_failure = TRUE; |
302 | else |
303 | curcoll = savepv(curcoll); |
304 | #endif /* USE_LOCALE_COLLATE */ |
305 | #ifdef USE_LOCALE_NUMERIC |
306 | if (! (curnum = |
307 | setlocale(LC_NUMERIC, |
308 | (!done && (lang || PerlEnv_getenv("LC_NUMERIC"))) |
309 | ? "" : Nullch))) |
310 | setlocale_failure = TRUE; |
311 | else |
312 | curnum = savepv(curnum); |
313 | #endif /* USE_LOCALE_NUMERIC */ |
314 | } |
315 | |
316 | #endif /* LC_ALL */ |
317 | |
318 | #endif /* !LOCALE_ENVIRON_REQUIRED */ |
319 | |
320 | #ifdef LC_ALL |
321 | if (! setlocale(LC_ALL, "")) |
322 | setlocale_failure = TRUE; |
323 | #endif /* LC_ALL */ |
324 | |
325 | if (!setlocale_failure) { |
326 | #ifdef USE_LOCALE_CTYPE |
327 | if (! (curctype = setlocale(LC_CTYPE, ""))) |
328 | setlocale_failure = TRUE; |
329 | else |
330 | curctype = savepv(curctype); |
331 | #endif /* USE_LOCALE_CTYPE */ |
332 | #ifdef USE_LOCALE_COLLATE |
333 | if (! (curcoll = setlocale(LC_COLLATE, ""))) |
334 | setlocale_failure = TRUE; |
335 | else |
336 | curcoll = savepv(curcoll); |
337 | #endif /* USE_LOCALE_COLLATE */ |
338 | #ifdef USE_LOCALE_NUMERIC |
339 | if (! (curnum = setlocale(LC_NUMERIC, ""))) |
340 | setlocale_failure = TRUE; |
341 | else |
342 | curnum = savepv(curnum); |
343 | #endif /* USE_LOCALE_NUMERIC */ |
344 | } |
345 | |
346 | if (setlocale_failure) { |
347 | char *p; |
348 | bool locwarn = (printwarn > 1 || |
349 | (printwarn && |
350 | (!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p)))); |
351 | |
352 | if (locwarn) { |
353 | #ifdef LC_ALL |
354 | |
355 | PerlIO_printf(Perl_error_log, |
356 | "perl: warning: Setting locale failed.\n"); |
357 | |
358 | #else /* !LC_ALL */ |
359 | |
360 | PerlIO_printf(Perl_error_log, |
361 | "perl: warning: Setting locale failed for the categories:\n\t"); |
362 | #ifdef USE_LOCALE_CTYPE |
363 | if (! curctype) |
364 | PerlIO_printf(Perl_error_log, "LC_CTYPE "); |
365 | #endif /* USE_LOCALE_CTYPE */ |
366 | #ifdef USE_LOCALE_COLLATE |
367 | if (! curcoll) |
368 | PerlIO_printf(Perl_error_log, "LC_COLLATE "); |
369 | #endif /* USE_LOCALE_COLLATE */ |
370 | #ifdef USE_LOCALE_NUMERIC |
371 | if (! curnum) |
372 | PerlIO_printf(Perl_error_log, "LC_NUMERIC "); |
373 | #endif /* USE_LOCALE_NUMERIC */ |
374 | PerlIO_printf(Perl_error_log, "\n"); |
375 | |
376 | #endif /* LC_ALL */ |
377 | |
378 | PerlIO_printf(Perl_error_log, |
379 | "perl: warning: Please check that your locale settings:\n"); |
380 | |
381 | #ifdef __GLIBC__ |
382 | PerlIO_printf(Perl_error_log, |
383 | "\tLANGUAGE = %c%s%c,\n", |
384 | language ? '"' : '(', |
385 | language ? language : "unset", |
386 | language ? '"' : ')'); |
387 | #endif |
388 | |
389 | PerlIO_printf(Perl_error_log, |
390 | "\tLC_ALL = %c%s%c,\n", |
391 | lc_all ? '"' : '(', |
392 | lc_all ? lc_all : "unset", |
393 | lc_all ? '"' : ')'); |
394 | |
395 | #if defined(USE_ENVIRON_ARRAY) |
396 | { |
397 | char **e; |
398 | for (e = environ; *e; e++) { |
399 | if (strnEQ(*e, "LC_", 3) |
400 | && strnNE(*e, "LC_ALL=", 7) |
401 | && (p = strchr(*e, '='))) |
402 | PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n", |
403 | (int)(p - *e), *e, p + 1); |
404 | } |
405 | } |
406 | #else |
407 | PerlIO_printf(Perl_error_log, |
408 | "\t(possibly more locale environment variables)\n"); |
409 | #endif |
410 | |
411 | PerlIO_printf(Perl_error_log, |
412 | "\tLANG = %c%s%c\n", |
413 | lang ? '"' : '(', |
414 | lang ? lang : "unset", |
415 | lang ? '"' : ')'); |
416 | |
417 | PerlIO_printf(Perl_error_log, |
418 | " are supported and installed on your system.\n"); |
419 | } |
420 | |
421 | #ifdef LC_ALL |
422 | |
423 | if (setlocale(LC_ALL, "C")) { |
424 | if (locwarn) |
425 | PerlIO_printf(Perl_error_log, |
426 | "perl: warning: Falling back to the standard locale (\"C\").\n"); |
427 | ok = 0; |
428 | } |
429 | else { |
430 | if (locwarn) |
431 | PerlIO_printf(Perl_error_log, |
432 | "perl: warning: Failed to fall back to the standard locale (\"C\").\n"); |
433 | ok = -1; |
434 | } |
435 | |
436 | #else /* ! LC_ALL */ |
437 | |
438 | if (0 |
439 | #ifdef USE_LOCALE_CTYPE |
440 | || !(curctype || setlocale(LC_CTYPE, "C")) |
441 | #endif /* USE_LOCALE_CTYPE */ |
442 | #ifdef USE_LOCALE_COLLATE |
443 | || !(curcoll || setlocale(LC_COLLATE, "C")) |
444 | #endif /* USE_LOCALE_COLLATE */ |
445 | #ifdef USE_LOCALE_NUMERIC |
446 | || !(curnum || setlocale(LC_NUMERIC, "C")) |
447 | #endif /* USE_LOCALE_NUMERIC */ |
448 | ) |
449 | { |
450 | if (locwarn) |
451 | PerlIO_printf(Perl_error_log, |
452 | "perl: warning: Cannot fall back to the standard locale (\"C\").\n"); |
453 | ok = -1; |
454 | } |
455 | |
456 | #endif /* ! LC_ALL */ |
457 | |
458 | #ifdef USE_LOCALE_CTYPE |
459 | curctype = savepv(setlocale(LC_CTYPE, Nullch)); |
460 | #endif /* USE_LOCALE_CTYPE */ |
461 | #ifdef USE_LOCALE_COLLATE |
462 | curcoll = savepv(setlocale(LC_COLLATE, Nullch)); |
463 | #endif /* USE_LOCALE_COLLATE */ |
464 | #ifdef USE_LOCALE_NUMERIC |
465 | curnum = savepv(setlocale(LC_NUMERIC, Nullch)); |
466 | #endif /* USE_LOCALE_NUMERIC */ |
467 | } |
468 | else { |
469 | |
470 | #ifdef USE_LOCALE_CTYPE |
471 | new_ctype(curctype); |
472 | #endif /* USE_LOCALE_CTYPE */ |
473 | |
474 | #ifdef USE_LOCALE_COLLATE |
475 | new_collate(curcoll); |
476 | #endif /* USE_LOCALE_COLLATE */ |
477 | |
478 | #ifdef USE_LOCALE_NUMERIC |
479 | new_numeric(curnum); |
480 | #endif /* USE_LOCALE_NUMERIC */ |
b310b053 |
481 | |
98994639 |
482 | } |
483 | |
484 | #endif /* USE_LOCALE */ |
485 | |
ec71e770 |
486 | #ifdef USE_PERLIO |
b310b053 |
487 | { |
fde18df1 |
488 | /* Set PL_utf8locale to TRUE if using PerlIO _and_ |
ec71e770 |
489 | any of the following are true: |
085a54d9 |
490 | - nl_langinfo(CODESET) contains /^utf-?8/i |
61de9fb5 |
491 | - $ENV{LC_ALL} contains /^utf-?8/i |
085a54d9 |
492 | - $ENV{LC_CTYPE} contains /^utf-?8/i |
61de9fb5 |
493 | - $ENV{LANG} contains /^utf-?8/i |
494 | The LC_ALL, LC_CTYPE, LANG obey the usual override |
495 | hierarchy of locale environment variables. (LANGUAGE |
496 | affects only LC_MESSAGES only under glibc.) (If present, |
497 | it overrides LC_MESSAGES for GNU gettext, and it also |
498 | can have more than one locale, separated by spaces, |
499 | in case you need to know.) |
8aa8f774 |
500 | If PL_utf8locale and PL_unicode (set by -C or by $ENV{PERL_UNICODE}) |
a05d7ebb |
501 | are true, perl.c:S_parse_body() will turn on the PerlIO :utf8 layer |
fde18df1 |
502 | on STDIN, STDOUT, STDERR, _and_ the default open discipline. |
085a54d9 |
503 | */ |
fde18df1 |
504 | bool utf8locale = FALSE; |
b310b053 |
505 | char *codeset = NULL; |
506 | #if defined(HAS_NL_LANGINFO) && defined(CODESET) |
507 | codeset = nl_langinfo(CODESET); |
508 | #endif |
61de9fb5 |
509 | if (codeset) |
fde18df1 |
510 | utf8locale = (ibcmp(codeset, "UTF-8", 5) == 0 || |
511 | ibcmp(codeset, "UTF8", 4) == 0); |
077a72a9 |
512 | #if defined(USE_LOCALE) |
61de9fb5 |
513 | else { /* nl_langinfo(CODESET) is supposed to correctly |
514 | * interpret the locale environment variables, |
515 | * but just in case it fails, let's do this manually. */ |
516 | if (lang) |
fde18df1 |
517 | utf8locale = (ibcmp(lang, "UTF-8", 5) == 0 || |
518 | ibcmp(lang, "UTF8", 4) == 0); |
b310b053 |
519 | #ifdef USE_LOCALE_CTYPE |
61de9fb5 |
520 | if (curctype) |
fde18df1 |
521 | utf8locale = (ibcmp(curctype, "UTF-8", 5) == 0 || |
522 | ibcmp(curctype, "UTF8", 4) == 0); |
b310b053 |
523 | #endif |
61de9fb5 |
524 | if (lc_all) |
fde18df1 |
525 | utf8locale = (ibcmp(lc_all, "UTF-8", 5) == 0 || |
526 | ibcmp(lc_all, "UTF8", 4) == 0); |
61de9fb5 |
527 | } |
fde18df1 |
528 | #endif /* USE_LOCALE */ |
529 | if (utf8locale) |
530 | PL_utf8locale = TRUE; |
531 | } |
a05d7ebb |
532 | /* Set PL_unicode to $ENV{PERL_UNICODE} if using PerlIO. |
fde18df1 |
533 | This is an alternative to using the -C command line switch |
534 | (the -C if present will override this). */ |
535 | { |
dd374669 |
536 | const char *p = PerlEnv_getenv("PERL_UNICODE"); |
a05d7ebb |
537 | PL_unicode = p ? parse_unicode_opts(&p) : 0; |
b310b053 |
538 | } |
ec71e770 |
539 | #endif |
b310b053 |
540 | |
98994639 |
541 | #ifdef USE_LOCALE_CTYPE |
542 | if (curctype != NULL) |
543 | Safefree(curctype); |
544 | #endif /* USE_LOCALE_CTYPE */ |
545 | #ifdef USE_LOCALE_COLLATE |
546 | if (curcoll != NULL) |
547 | Safefree(curcoll); |
548 | #endif /* USE_LOCALE_COLLATE */ |
549 | #ifdef USE_LOCALE_NUMERIC |
550 | if (curnum != NULL) |
551 | Safefree(curnum); |
552 | #endif /* USE_LOCALE_NUMERIC */ |
553 | return ok; |
554 | } |
555 | |
556 | /* Backwards compatibility. */ |
557 | int |
558 | Perl_init_i18nl14n(pTHX_ int printwarn) |
559 | { |
560 | return init_i18nl10n(printwarn); |
561 | } |
562 | |
563 | #ifdef USE_LOCALE_COLLATE |
564 | |
565 | /* |
566 | * mem_collxfrm() is a bit like strxfrm() but with two important |
567 | * differences. First, it handles embedded NULs. Second, it allocates |
568 | * a bit more memory than needed for the transformed data itself. |
569 | * The real transformed data begins at offset sizeof(collationix). |
570 | * Please see sv_collxfrm() to see how this is used. |
571 | */ |
166f8a29 |
572 | |
98994639 |
573 | char * |
574 | Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen) |
575 | { |
576 | char *xbuf; |
577 | STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */ |
578 | |
579 | /* the first sizeof(collationix) bytes are used by sv_collxfrm(). */ |
580 | /* the +1 is for the terminating NUL. */ |
581 | |
582 | xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1; |
583 | New(171, xbuf, xAlloc, char); |
584 | if (! xbuf) |
585 | goto bad; |
586 | |
587 | *(U32*)xbuf = PL_collation_ix; |
588 | xout = sizeof(PL_collation_ix); |
589 | for (xin = 0; xin < len; ) { |
590 | SSize_t xused; |
591 | |
592 | for (;;) { |
593 | xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout); |
594 | if (xused == -1) |
595 | goto bad; |
eb160463 |
596 | if ((STRLEN)xused < xAlloc - xout) |
98994639 |
597 | break; |
598 | xAlloc = (2 * xAlloc) + 1; |
599 | Renew(xbuf, xAlloc, char); |
600 | if (! xbuf) |
601 | goto bad; |
602 | } |
603 | |
604 | xin += strlen(s + xin) + 1; |
605 | xout += xused; |
606 | |
607 | /* Embedded NULs are understood but silently skipped |
608 | * because they make no sense in locale collation. */ |
609 | } |
610 | |
611 | xbuf[xout] = '\0'; |
612 | *xlen = xout - sizeof(PL_collation_ix); |
613 | return xbuf; |
614 | |
615 | bad: |
616 | Safefree(xbuf); |
617 | *xlen = 0; |
618 | return NULL; |
619 | } |
620 | |
621 | #endif /* USE_LOCALE_COLLATE */ |
622 | |
66610fdd |
623 | /* |
624 | * Local variables: |
625 | * c-indentation-style: bsd |
626 | * c-basic-offset: 4 |
627 | * indent-tabs-mode: t |
628 | * End: |
629 | * |
37442d52 |
630 | * ex: set ts=8 sts=4 sw=4 noet: |
631 | */ |