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 | |
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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 | { |
8772537c |
56 | const char *s = strchr(locs, '='); |
98994639 |
57 | bool okay = TRUE; |
58 | |
8772537c |
59 | if (s) { |
60 | const char * const t = strchr(s, '.'); |
98994639 |
61 | okay = FALSE; |
8772537c |
62 | if (t) { |
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); |
67 | locs[len] = 0; |
68 | okay = TRUE; |
98994639 |
69 | } |
70 | } |
71 | } |
72 | |
73 | if (!okay) |
74 | Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs); |
75 | |
76 | return locs; |
77 | } |
27da23d5 |
78 | #endif |
98994639 |
79 | |
80 | void |
81 | Perl_set_numeric_radix(pTHX) |
82 | { |
83 | #ifdef USE_LOCALE_NUMERIC |
84 | # ifdef HAS_LOCALECONV |
85 | struct lconv* lc; |
86 | |
87 | lc = localeconv(); |
88 | if (lc && lc->decimal_point) { |
89 | if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) { |
90 | SvREFCNT_dec(PL_numeric_radix_sv); |
91 | PL_numeric_radix_sv = Nullsv; |
92 | } |
93 | else { |
94 | if (PL_numeric_radix_sv) |
95 | sv_setpv(PL_numeric_radix_sv, lc->decimal_point); |
96 | else |
97 | PL_numeric_radix_sv = newSVpv(lc->decimal_point, 0); |
98 | } |
99 | } |
100 | else |
101 | PL_numeric_radix_sv = Nullsv; |
102 | # endif /* HAS_LOCALECONV */ |
103 | #endif /* USE_LOCALE_NUMERIC */ |
104 | } |
105 | |
106 | /* |
107 | * Set up for a new numeric locale. |
108 | */ |
109 | void |
8772537c |
110 | Perl_new_numeric(pTHX_ const char *newnum) |
98994639 |
111 | { |
112 | #ifdef USE_LOCALE_NUMERIC |
113 | |
114 | if (! newnum) { |
115 | if (PL_numeric_name) { |
116 | Safefree(PL_numeric_name); |
117 | PL_numeric_name = NULL; |
118 | } |
119 | PL_numeric_standard = TRUE; |
120 | PL_numeric_local = TRUE; |
121 | return; |
122 | } |
123 | |
124 | if (! PL_numeric_name || strNE(PL_numeric_name, newnum)) { |
125 | Safefree(PL_numeric_name); |
126 | PL_numeric_name = stdize_locale(savepv(newnum)); |
770526c1 |
127 | PL_numeric_standard = ((*newnum == 'C' && newnum[1] == '\0') |
128 | || strEQ(newnum, "POSIX")); |
98994639 |
129 | PL_numeric_local = TRUE; |
130 | set_numeric_radix(); |
131 | } |
132 | |
133 | #endif /* USE_LOCALE_NUMERIC */ |
134 | } |
135 | |
136 | void |
137 | Perl_set_numeric_standard(pTHX) |
138 | { |
139 | #ifdef USE_LOCALE_NUMERIC |
140 | |
141 | if (! PL_numeric_standard) { |
142 | setlocale(LC_NUMERIC, "C"); |
143 | PL_numeric_standard = TRUE; |
144 | PL_numeric_local = FALSE; |
145 | set_numeric_radix(); |
146 | } |
147 | |
148 | #endif /* USE_LOCALE_NUMERIC */ |
149 | } |
150 | |
151 | void |
152 | Perl_set_numeric_local(pTHX) |
153 | { |
154 | #ifdef USE_LOCALE_NUMERIC |
155 | |
156 | if (! PL_numeric_local) { |
157 | setlocale(LC_NUMERIC, PL_numeric_name); |
158 | PL_numeric_standard = FALSE; |
159 | PL_numeric_local = TRUE; |
160 | set_numeric_radix(); |
161 | } |
162 | |
163 | #endif /* USE_LOCALE_NUMERIC */ |
164 | } |
165 | |
166 | /* |
167 | * Set up for a new ctype locale. |
168 | */ |
169 | void |
8772537c |
170 | Perl_new_ctype(pTHX_ const char *newctype) |
98994639 |
171 | { |
172 | #ifdef USE_LOCALE_CTYPE |
27da23d5 |
173 | dVAR; |
98994639 |
174 | int i; |
175 | |
176 | for (i = 0; i < 256; i++) { |
177 | if (isUPPER_LC(i)) |
178 | PL_fold_locale[i] = toLOWER_LC(i); |
179 | else if (isLOWER_LC(i)) |
180 | PL_fold_locale[i] = toUPPER_LC(i); |
181 | else |
182 | PL_fold_locale[i] = i; |
183 | } |
184 | |
185 | #endif /* USE_LOCALE_CTYPE */ |
8772537c |
186 | PERL_UNUSED_ARG(newctype); |
98994639 |
187 | } |
188 | |
189 | /* |
190 | * Set up for a new collation locale. |
191 | */ |
192 | void |
8772537c |
193 | Perl_new_collate(pTHX_ const char *newcoll) |
98994639 |
194 | { |
195 | #ifdef USE_LOCALE_COLLATE |
196 | |
197 | if (! newcoll) { |
198 | if (PL_collation_name) { |
199 | ++PL_collation_ix; |
200 | Safefree(PL_collation_name); |
201 | PL_collation_name = NULL; |
202 | } |
203 | PL_collation_standard = TRUE; |
204 | PL_collxfrm_base = 0; |
205 | PL_collxfrm_mult = 2; |
206 | return; |
207 | } |
208 | |
209 | if (! PL_collation_name || strNE(PL_collation_name, newcoll)) { |
210 | ++PL_collation_ix; |
211 | Safefree(PL_collation_name); |
212 | PL_collation_name = stdize_locale(savepv(newcoll)); |
770526c1 |
213 | PL_collation_standard = ((*newcoll == 'C' && newcoll[1] == '\0') |
214 | || strEQ(newcoll, "POSIX")); |
98994639 |
215 | |
216 | { |
217 | /* 2: at most so many chars ('a', 'b'). */ |
218 | /* 50: surely no system expands a char more. */ |
219 | #define XFRMBUFSIZE (2 * 50) |
220 | char xbuf[XFRMBUFSIZE]; |
8772537c |
221 | const Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE); |
222 | const Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE); |
223 | const SSize_t mult = fb - fa; |
98994639 |
224 | if (mult < 1) |
225 | Perl_croak(aTHX_ "strxfrm() gets absurd"); |
eb160463 |
226 | PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0; |
98994639 |
227 | PL_collxfrm_mult = mult; |
228 | } |
229 | } |
230 | |
231 | #endif /* USE_LOCALE_COLLATE */ |
232 | } |
233 | |
234 | /* |
235 | * Initialize locale awareness. |
236 | */ |
237 | int |
238 | Perl_init_i18nl10n(pTHX_ int printwarn) |
239 | { |
240 | int ok = 1; |
241 | /* returns |
242 | * 1 = set ok or not applicable, |
243 | * 0 = fallback to C locale, |
244 | * -1 = fallback to C locale failed |
245 | */ |
246 | |
247 | #if defined(USE_LOCALE) |
248 | |
249 | #ifdef USE_LOCALE_CTYPE |
250 | char *curctype = NULL; |
251 | #endif /* USE_LOCALE_CTYPE */ |
252 | #ifdef USE_LOCALE_COLLATE |
253 | char *curcoll = NULL; |
254 | #endif /* USE_LOCALE_COLLATE */ |
255 | #ifdef USE_LOCALE_NUMERIC |
256 | char *curnum = NULL; |
257 | #endif /* USE_LOCALE_NUMERIC */ |
258 | #ifdef __GLIBC__ |
259 | char *language = PerlEnv_getenv("LANGUAGE"); |
260 | #endif |
261 | char *lc_all = PerlEnv_getenv("LC_ALL"); |
262 | char *lang = PerlEnv_getenv("LANG"); |
263 | bool setlocale_failure = FALSE; |
264 | |
265 | #ifdef LOCALE_ENVIRON_REQUIRED |
266 | |
267 | /* |
268 | * Ultrix setlocale(..., "") fails if there are no environment |
269 | * variables from which to get a locale name. |
270 | */ |
271 | |
272 | bool done = FALSE; |
273 | |
274 | #ifdef LC_ALL |
275 | if (lang) { |
276 | if (setlocale(LC_ALL, "")) |
277 | done = TRUE; |
278 | else |
279 | setlocale_failure = TRUE; |
280 | } |
281 | if (!setlocale_failure) { |
282 | #ifdef USE_LOCALE_CTYPE |
283 | if (! (curctype = |
284 | setlocale(LC_CTYPE, |
285 | (!done && (lang || PerlEnv_getenv("LC_CTYPE"))) |
286 | ? "" : Nullch))) |
287 | setlocale_failure = TRUE; |
288 | else |
289 | curctype = savepv(curctype); |
290 | #endif /* USE_LOCALE_CTYPE */ |
291 | #ifdef USE_LOCALE_COLLATE |
292 | if (! (curcoll = |
293 | setlocale(LC_COLLATE, |
294 | (!done && (lang || PerlEnv_getenv("LC_COLLATE"))) |
295 | ? "" : Nullch))) |
296 | setlocale_failure = TRUE; |
297 | else |
298 | curcoll = savepv(curcoll); |
299 | #endif /* USE_LOCALE_COLLATE */ |
300 | #ifdef USE_LOCALE_NUMERIC |
301 | if (! (curnum = |
302 | setlocale(LC_NUMERIC, |
303 | (!done && (lang || PerlEnv_getenv("LC_NUMERIC"))) |
304 | ? "" : Nullch))) |
305 | setlocale_failure = TRUE; |
306 | else |
307 | curnum = savepv(curnum); |
308 | #endif /* USE_LOCALE_NUMERIC */ |
309 | } |
310 | |
311 | #endif /* LC_ALL */ |
312 | |
313 | #endif /* !LOCALE_ENVIRON_REQUIRED */ |
314 | |
315 | #ifdef LC_ALL |
316 | if (! setlocale(LC_ALL, "")) |
317 | setlocale_failure = TRUE; |
318 | #endif /* LC_ALL */ |
319 | |
320 | if (!setlocale_failure) { |
321 | #ifdef USE_LOCALE_CTYPE |
322 | if (! (curctype = setlocale(LC_CTYPE, ""))) |
323 | setlocale_failure = TRUE; |
324 | else |
325 | curctype = savepv(curctype); |
326 | #endif /* USE_LOCALE_CTYPE */ |
327 | #ifdef USE_LOCALE_COLLATE |
328 | if (! (curcoll = setlocale(LC_COLLATE, ""))) |
329 | setlocale_failure = TRUE; |
330 | else |
331 | curcoll = savepv(curcoll); |
332 | #endif /* USE_LOCALE_COLLATE */ |
333 | #ifdef USE_LOCALE_NUMERIC |
334 | if (! (curnum = setlocale(LC_NUMERIC, ""))) |
335 | setlocale_failure = TRUE; |
336 | else |
337 | curnum = savepv(curnum); |
338 | #endif /* USE_LOCALE_NUMERIC */ |
339 | } |
340 | |
341 | if (setlocale_failure) { |
342 | char *p; |
343 | bool locwarn = (printwarn > 1 || |
344 | (printwarn && |
345 | (!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p)))); |
346 | |
347 | if (locwarn) { |
348 | #ifdef LC_ALL |
349 | |
350 | PerlIO_printf(Perl_error_log, |
351 | "perl: warning: Setting locale failed.\n"); |
352 | |
353 | #else /* !LC_ALL */ |
354 | |
355 | PerlIO_printf(Perl_error_log, |
356 | "perl: warning: Setting locale failed for the categories:\n\t"); |
357 | #ifdef USE_LOCALE_CTYPE |
358 | if (! curctype) |
359 | PerlIO_printf(Perl_error_log, "LC_CTYPE "); |
360 | #endif /* USE_LOCALE_CTYPE */ |
361 | #ifdef USE_LOCALE_COLLATE |
362 | if (! curcoll) |
363 | PerlIO_printf(Perl_error_log, "LC_COLLATE "); |
364 | #endif /* USE_LOCALE_COLLATE */ |
365 | #ifdef USE_LOCALE_NUMERIC |
366 | if (! curnum) |
367 | PerlIO_printf(Perl_error_log, "LC_NUMERIC "); |
368 | #endif /* USE_LOCALE_NUMERIC */ |
369 | PerlIO_printf(Perl_error_log, "\n"); |
370 | |
371 | #endif /* LC_ALL */ |
372 | |
373 | PerlIO_printf(Perl_error_log, |
374 | "perl: warning: Please check that your locale settings:\n"); |
375 | |
376 | #ifdef __GLIBC__ |
377 | PerlIO_printf(Perl_error_log, |
378 | "\tLANGUAGE = %c%s%c,\n", |
379 | language ? '"' : '(', |
380 | language ? language : "unset", |
381 | language ? '"' : ')'); |
382 | #endif |
383 | |
384 | PerlIO_printf(Perl_error_log, |
385 | "\tLC_ALL = %c%s%c,\n", |
386 | lc_all ? '"' : '(', |
387 | lc_all ? lc_all : "unset", |
388 | lc_all ? '"' : ')'); |
389 | |
390 | #if defined(USE_ENVIRON_ARRAY) |
391 | { |
392 | char **e; |
393 | for (e = environ; *e; e++) { |
394 | if (strnEQ(*e, "LC_", 3) |
395 | && strnNE(*e, "LC_ALL=", 7) |
396 | && (p = strchr(*e, '='))) |
397 | PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n", |
398 | (int)(p - *e), *e, p + 1); |
399 | } |
400 | } |
401 | #else |
402 | PerlIO_printf(Perl_error_log, |
403 | "\t(possibly more locale environment variables)\n"); |
404 | #endif |
405 | |
406 | PerlIO_printf(Perl_error_log, |
407 | "\tLANG = %c%s%c\n", |
408 | lang ? '"' : '(', |
409 | lang ? lang : "unset", |
410 | lang ? '"' : ')'); |
411 | |
412 | PerlIO_printf(Perl_error_log, |
413 | " are supported and installed on your system.\n"); |
414 | } |
415 | |
416 | #ifdef LC_ALL |
417 | |
418 | if (setlocale(LC_ALL, "C")) { |
419 | if (locwarn) |
420 | PerlIO_printf(Perl_error_log, |
421 | "perl: warning: Falling back to the standard locale (\"C\").\n"); |
422 | ok = 0; |
423 | } |
424 | else { |
425 | if (locwarn) |
426 | PerlIO_printf(Perl_error_log, |
427 | "perl: warning: Failed to fall back to the standard locale (\"C\").\n"); |
428 | ok = -1; |
429 | } |
430 | |
431 | #else /* ! LC_ALL */ |
432 | |
433 | if (0 |
434 | #ifdef USE_LOCALE_CTYPE |
435 | || !(curctype || setlocale(LC_CTYPE, "C")) |
436 | #endif /* USE_LOCALE_CTYPE */ |
437 | #ifdef USE_LOCALE_COLLATE |
438 | || !(curcoll || setlocale(LC_COLLATE, "C")) |
439 | #endif /* USE_LOCALE_COLLATE */ |
440 | #ifdef USE_LOCALE_NUMERIC |
441 | || !(curnum || setlocale(LC_NUMERIC, "C")) |
442 | #endif /* USE_LOCALE_NUMERIC */ |
443 | ) |
444 | { |
445 | if (locwarn) |
446 | PerlIO_printf(Perl_error_log, |
447 | "perl: warning: Cannot fall back to the standard locale (\"C\").\n"); |
448 | ok = -1; |
449 | } |
450 | |
451 | #endif /* ! LC_ALL */ |
452 | |
453 | #ifdef USE_LOCALE_CTYPE |
454 | curctype = savepv(setlocale(LC_CTYPE, Nullch)); |
455 | #endif /* USE_LOCALE_CTYPE */ |
456 | #ifdef USE_LOCALE_COLLATE |
457 | curcoll = savepv(setlocale(LC_COLLATE, Nullch)); |
458 | #endif /* USE_LOCALE_COLLATE */ |
459 | #ifdef USE_LOCALE_NUMERIC |
460 | curnum = savepv(setlocale(LC_NUMERIC, Nullch)); |
461 | #endif /* USE_LOCALE_NUMERIC */ |
462 | } |
463 | else { |
464 | |
465 | #ifdef USE_LOCALE_CTYPE |
466 | new_ctype(curctype); |
467 | #endif /* USE_LOCALE_CTYPE */ |
468 | |
469 | #ifdef USE_LOCALE_COLLATE |
470 | new_collate(curcoll); |
471 | #endif /* USE_LOCALE_COLLATE */ |
472 | |
473 | #ifdef USE_LOCALE_NUMERIC |
474 | new_numeric(curnum); |
475 | #endif /* USE_LOCALE_NUMERIC */ |
b310b053 |
476 | |
98994639 |
477 | } |
478 | |
479 | #endif /* USE_LOCALE */ |
480 | |
ec71e770 |
481 | #ifdef USE_PERLIO |
b310b053 |
482 | { |
fde18df1 |
483 | /* Set PL_utf8locale to TRUE if using PerlIO _and_ |
ec71e770 |
484 | any of the following are true: |
085a54d9 |
485 | - nl_langinfo(CODESET) contains /^utf-?8/i |
61de9fb5 |
486 | - $ENV{LC_ALL} contains /^utf-?8/i |
085a54d9 |
487 | - $ENV{LC_CTYPE} contains /^utf-?8/i |
61de9fb5 |
488 | - $ENV{LANG} contains /^utf-?8/i |
489 | The LC_ALL, LC_CTYPE, LANG obey the usual override |
490 | hierarchy of locale environment variables. (LANGUAGE |
491 | affects only LC_MESSAGES only under glibc.) (If present, |
492 | it overrides LC_MESSAGES for GNU gettext, and it also |
493 | can have more than one locale, separated by spaces, |
494 | in case you need to know.) |
8aa8f774 |
495 | If PL_utf8locale and PL_unicode (set by -C or by $ENV{PERL_UNICODE}) |
a05d7ebb |
496 | are true, perl.c:S_parse_body() will turn on the PerlIO :utf8 layer |
fde18df1 |
497 | on STDIN, STDOUT, STDERR, _and_ the default open discipline. |
085a54d9 |
498 | */ |
fde18df1 |
499 | bool utf8locale = FALSE; |
b310b053 |
500 | char *codeset = NULL; |
501 | #if defined(HAS_NL_LANGINFO) && defined(CODESET) |
502 | codeset = nl_langinfo(CODESET); |
503 | #endif |
61de9fb5 |
504 | if (codeset) |
fde18df1 |
505 | utf8locale = (ibcmp(codeset, "UTF-8", 5) == 0 || |
506 | ibcmp(codeset, "UTF8", 4) == 0); |
077a72a9 |
507 | #if defined(USE_LOCALE) |
61de9fb5 |
508 | else { /* nl_langinfo(CODESET) is supposed to correctly |
509 | * interpret the locale environment variables, |
510 | * but just in case it fails, let's do this manually. */ |
511 | if (lang) |
fde18df1 |
512 | utf8locale = (ibcmp(lang, "UTF-8", 5) == 0 || |
513 | ibcmp(lang, "UTF8", 4) == 0); |
b310b053 |
514 | #ifdef USE_LOCALE_CTYPE |
61de9fb5 |
515 | if (curctype) |
fde18df1 |
516 | utf8locale = (ibcmp(curctype, "UTF-8", 5) == 0 || |
517 | ibcmp(curctype, "UTF8", 4) == 0); |
b310b053 |
518 | #endif |
61de9fb5 |
519 | if (lc_all) |
fde18df1 |
520 | utf8locale = (ibcmp(lc_all, "UTF-8", 5) == 0 || |
521 | ibcmp(lc_all, "UTF8", 4) == 0); |
61de9fb5 |
522 | } |
fde18df1 |
523 | #endif /* USE_LOCALE */ |
524 | if (utf8locale) |
525 | PL_utf8locale = TRUE; |
526 | } |
a05d7ebb |
527 | /* Set PL_unicode to $ENV{PERL_UNICODE} if using PerlIO. |
fde18df1 |
528 | This is an alternative to using the -C command line switch |
529 | (the -C if present will override this). */ |
530 | { |
dd374669 |
531 | const char *p = PerlEnv_getenv("PERL_UNICODE"); |
a05d7ebb |
532 | PL_unicode = p ? parse_unicode_opts(&p) : 0; |
b310b053 |
533 | } |
ec71e770 |
534 | #endif |
b310b053 |
535 | |
98994639 |
536 | #ifdef USE_LOCALE_CTYPE |
537 | if (curctype != NULL) |
538 | Safefree(curctype); |
539 | #endif /* USE_LOCALE_CTYPE */ |
540 | #ifdef USE_LOCALE_COLLATE |
541 | if (curcoll != NULL) |
542 | Safefree(curcoll); |
543 | #endif /* USE_LOCALE_COLLATE */ |
544 | #ifdef USE_LOCALE_NUMERIC |
545 | if (curnum != NULL) |
546 | Safefree(curnum); |
547 | #endif /* USE_LOCALE_NUMERIC */ |
548 | return ok; |
549 | } |
550 | |
551 | /* Backwards compatibility. */ |
552 | int |
553 | Perl_init_i18nl14n(pTHX_ int printwarn) |
554 | { |
555 | return init_i18nl10n(printwarn); |
556 | } |
557 | |
558 | #ifdef USE_LOCALE_COLLATE |
559 | |
560 | /* |
561 | * mem_collxfrm() is a bit like strxfrm() but with two important |
562 | * differences. First, it handles embedded NULs. Second, it allocates |
563 | * a bit more memory than needed for the transformed data itself. |
564 | * The real transformed data begins at offset sizeof(collationix). |
565 | * Please see sv_collxfrm() to see how this is used. |
566 | */ |
166f8a29 |
567 | |
98994639 |
568 | char * |
569 | Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen) |
570 | { |
571 | char *xbuf; |
572 | STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */ |
573 | |
574 | /* the first sizeof(collationix) bytes are used by sv_collxfrm(). */ |
575 | /* the +1 is for the terminating NUL. */ |
576 | |
577 | xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1; |
578 | New(171, xbuf, xAlloc, char); |
579 | if (! xbuf) |
580 | goto bad; |
581 | |
582 | *(U32*)xbuf = PL_collation_ix; |
583 | xout = sizeof(PL_collation_ix); |
584 | for (xin = 0; xin < len; ) { |
585 | SSize_t xused; |
586 | |
587 | for (;;) { |
588 | xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout); |
589 | if (xused == -1) |
590 | goto bad; |
eb160463 |
591 | if ((STRLEN)xused < xAlloc - xout) |
98994639 |
592 | break; |
593 | xAlloc = (2 * xAlloc) + 1; |
594 | Renew(xbuf, xAlloc, char); |
595 | if (! xbuf) |
596 | goto bad; |
597 | } |
598 | |
599 | xin += strlen(s + xin) + 1; |
600 | xout += xused; |
601 | |
602 | /* Embedded NULs are understood but silently skipped |
603 | * because they make no sense in locale collation. */ |
604 | } |
605 | |
606 | xbuf[xout] = '\0'; |
607 | *xlen = xout - sizeof(PL_collation_ix); |
608 | return xbuf; |
609 | |
610 | bad: |
611 | Safefree(xbuf); |
612 | *xlen = 0; |
613 | return NULL; |
614 | } |
615 | |
616 | #endif /* USE_LOCALE_COLLATE */ |
617 | |
66610fdd |
618 | /* |
619 | * Local variables: |
620 | * c-indentation-style: bsd |
621 | * c-basic-offset: 4 |
622 | * indent-tabs-mode: t |
623 | * End: |
624 | * |
37442d52 |
625 | * ex: set ts=8 sts=4 sw=4 noet: |
626 | */ |