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Correct the paramter to Perl_op_xmldump(). The one that got away from
[perl5.git] / locale.c
CommitLineData
98994639
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1/* locale.c
2 *
663f364b
NC
3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2005, 2006, 2007, by Larry Wall and others
98994639
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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/*
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
DM
21/* utility functions for handling locale-specific stuff like what
22 * character represents the decimal point.
23 */
24
98994639
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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
JH
33#ifdef I_LANGINFO
34# include <langinfo.h>
35#endif
36
a4af207c
JH
37#include "reentr.h"
38
27da23d5 39#if defined(USE_LOCALE_NUMERIC) || defined(USE_LOCALE_COLLATE)
98994639
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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 */
53STATIC char *
54S_stdize_locale(pTHX_ char *locs)
55{
7452cf6a 56 const char * const s = strchr(locs, '=');
98994639
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57 bool okay = TRUE;
58
8772537c
AL
59 if (s) {
60 const char * const t = strchr(s, '.');
98994639 61 okay = FALSE;
8772537c
AL
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
HS
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
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79
80void
81Perl_set_numeric_radix(pTHX)
82{
83#ifdef USE_LOCALE_NUMERIC
97aff369 84 dVAR;
98994639 85# ifdef HAS_LOCALECONV
7452cf6a 86 const struct lconv* const lc = localeconv();
98994639 87
98994639
HS
88 if (lc && lc->decimal_point) {
89 if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) {
90 SvREFCNT_dec(PL_numeric_radix_sv);
a0714e2c 91 PL_numeric_radix_sv = NULL;
98994639
HS
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
a0714e2c 101 PL_numeric_radix_sv = NULL;
98994639
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102# endif /* HAS_LOCALECONV */
103#endif /* USE_LOCALE_NUMERIC */
104}
105
106/*
107 * Set up for a new numeric locale.
108 */
109void
8772537c 110Perl_new_numeric(pTHX_ const char *newnum)
98994639
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111{
112#ifdef USE_LOCALE_NUMERIC
97aff369 113 dVAR;
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114
115 if (! newnum) {
43c5f42d
NC
116 Safefree(PL_numeric_name);
117 PL_numeric_name = NULL;
98994639
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118 PL_numeric_standard = TRUE;
119 PL_numeric_local = TRUE;
120 return;
121 }
122
123 if (! PL_numeric_name || strNE(PL_numeric_name, newnum)) {
124 Safefree(PL_numeric_name);
125 PL_numeric_name = stdize_locale(savepv(newnum));
770526c1
NC
126 PL_numeric_standard = ((*newnum == 'C' && newnum[1] == '\0')
127 || strEQ(newnum, "POSIX"));
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128 PL_numeric_local = TRUE;
129 set_numeric_radix();
130 }
131
132#endif /* USE_LOCALE_NUMERIC */
133}
134
135void
136Perl_set_numeric_standard(pTHX)
137{
138#ifdef USE_LOCALE_NUMERIC
97aff369 139 dVAR;
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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
151void
152Perl_set_numeric_local(pTHX)
153{
154#ifdef USE_LOCALE_NUMERIC
97aff369 155 dVAR;
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156
157 if (! PL_numeric_local) {
158 setlocale(LC_NUMERIC, PL_numeric_name);
159 PL_numeric_standard = FALSE;
160 PL_numeric_local = TRUE;
161 set_numeric_radix();
162 }
163
164#endif /* USE_LOCALE_NUMERIC */
165}
166
167/*
168 * Set up for a new ctype locale.
169 */
170void
8772537c 171Perl_new_ctype(pTHX_ const char *newctype)
98994639
HS
172{
173#ifdef USE_LOCALE_CTYPE
27da23d5 174 dVAR;
98994639
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175 int i;
176
177 for (i = 0; i < 256; i++) {
178 if (isUPPER_LC(i))
179 PL_fold_locale[i] = toLOWER_LC(i);
180 else if (isLOWER_LC(i))
181 PL_fold_locale[i] = toUPPER_LC(i);
182 else
183 PL_fold_locale[i] = i;
184 }
185
186#endif /* USE_LOCALE_CTYPE */
8772537c 187 PERL_UNUSED_ARG(newctype);
96a5add6 188 PERL_UNUSED_CONTEXT;
98994639
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189}
190
191/*
192 * Set up for a new collation locale.
193 */
194void
8772537c 195Perl_new_collate(pTHX_ const char *newcoll)
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HS
196{
197#ifdef USE_LOCALE_COLLATE
97aff369 198 dVAR;
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199
200 if (! newcoll) {
201 if (PL_collation_name) {
202 ++PL_collation_ix;
203 Safefree(PL_collation_name);
204 PL_collation_name = NULL;
205 }
206 PL_collation_standard = TRUE;
207 PL_collxfrm_base = 0;
208 PL_collxfrm_mult = 2;
209 return;
210 }
211
212 if (! PL_collation_name || strNE(PL_collation_name, newcoll)) {
213 ++PL_collation_ix;
214 Safefree(PL_collation_name);
215 PL_collation_name = stdize_locale(savepv(newcoll));
770526c1
NC
216 PL_collation_standard = ((*newcoll == 'C' && newcoll[1] == '\0')
217 || strEQ(newcoll, "POSIX"));
98994639
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218
219 {
220 /* 2: at most so many chars ('a', 'b'). */
221 /* 50: surely no system expands a char more. */
222#define XFRMBUFSIZE (2 * 50)
223 char xbuf[XFRMBUFSIZE];
8772537c
AL
224 const Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE);
225 const Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE);
226 const SSize_t mult = fb - fa;
98994639
HS
227 if (mult < 1)
228 Perl_croak(aTHX_ "strxfrm() gets absurd");
eb160463 229 PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0;
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230 PL_collxfrm_mult = mult;
231 }
232 }
233
234#endif /* USE_LOCALE_COLLATE */
235}
236
237/*
238 * Initialize locale awareness.
239 */
240int
241Perl_init_i18nl10n(pTHX_ int printwarn)
242{
243 int ok = 1;
244 /* returns
245 * 1 = set ok or not applicable,
246 * 0 = fallback to C locale,
247 * -1 = fallback to C locale failed
248 */
249
250#if defined(USE_LOCALE)
97aff369 251 dVAR;
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252
253#ifdef USE_LOCALE_CTYPE
254 char *curctype = NULL;
255#endif /* USE_LOCALE_CTYPE */
256#ifdef USE_LOCALE_COLLATE
257 char *curcoll = NULL;
258#endif /* USE_LOCALE_COLLATE */
259#ifdef USE_LOCALE_NUMERIC
260 char *curnum = NULL;
261#endif /* USE_LOCALE_NUMERIC */
262#ifdef __GLIBC__
7452cf6a 263 char * const language = PerlEnv_getenv("LANGUAGE");
98994639 264#endif
7452cf6a
AL
265 char * const lc_all = PerlEnv_getenv("LC_ALL");
266 char * const lang = PerlEnv_getenv("LANG");
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267 bool setlocale_failure = FALSE;
268
269#ifdef LOCALE_ENVIRON_REQUIRED
270
271 /*
272 * Ultrix setlocale(..., "") fails if there are no environment
273 * variables from which to get a locale name.
274 */
275
276 bool done = FALSE;
277
278#ifdef LC_ALL
279 if (lang) {
280 if (setlocale(LC_ALL, ""))
281 done = TRUE;
282 else
283 setlocale_failure = TRUE;
284 }
285 if (!setlocale_failure) {
286#ifdef USE_LOCALE_CTYPE
56279a21 287 Safefree(curctype);
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288 if (! (curctype =
289 setlocale(LC_CTYPE,
290 (!done && (lang || PerlEnv_getenv("LC_CTYPE")))
bd61b366 291 ? "" : NULL)))
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292 setlocale_failure = TRUE;
293 else
294 curctype = savepv(curctype);
295#endif /* USE_LOCALE_CTYPE */
296#ifdef USE_LOCALE_COLLATE
56279a21 297 Safefree(curcoll);
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HS
298 if (! (curcoll =
299 setlocale(LC_COLLATE,
300 (!done && (lang || PerlEnv_getenv("LC_COLLATE")))
bd61b366 301 ? "" : NULL)))
98994639
HS
302 setlocale_failure = TRUE;
303 else
304 curcoll = savepv(curcoll);
305#endif /* USE_LOCALE_COLLATE */
306#ifdef USE_LOCALE_NUMERIC
56279a21 307 Safefree(curnum);
98994639
HS
308 if (! (curnum =
309 setlocale(LC_NUMERIC,
310 (!done && (lang || PerlEnv_getenv("LC_NUMERIC")))
bd61b366 311 ? "" : NULL)))
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HS
312 setlocale_failure = TRUE;
313 else
314 curnum = savepv(curnum);
315#endif /* USE_LOCALE_NUMERIC */
316 }
317
318#endif /* LC_ALL */
319
320#endif /* !LOCALE_ENVIRON_REQUIRED */
321
322#ifdef LC_ALL
323 if (! setlocale(LC_ALL, ""))
324 setlocale_failure = TRUE;
325#endif /* LC_ALL */
326
327 if (!setlocale_failure) {
328#ifdef USE_LOCALE_CTYPE
6cb43dbf 329 Safefree(curctype);
98994639
HS
330 if (! (curctype = setlocale(LC_CTYPE, "")))
331 setlocale_failure = TRUE;
332 else
333 curctype = savepv(curctype);
334#endif /* USE_LOCALE_CTYPE */
335#ifdef USE_LOCALE_COLLATE
6cb43dbf 336 Safefree(curcoll);
98994639
HS
337 if (! (curcoll = setlocale(LC_COLLATE, "")))
338 setlocale_failure = TRUE;
339 else
340 curcoll = savepv(curcoll);
341#endif /* USE_LOCALE_COLLATE */
342#ifdef USE_LOCALE_NUMERIC
6cb43dbf 343 Safefree(curnum);
98994639
HS
344 if (! (curnum = setlocale(LC_NUMERIC, "")))
345 setlocale_failure = TRUE;
346 else
347 curnum = savepv(curnum);
348#endif /* USE_LOCALE_NUMERIC */
349 }
350
351 if (setlocale_failure) {
352 char *p;
0bd48802 353 const bool locwarn = (printwarn > 1 ||
98994639
HS
354 (printwarn &&
355 (!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p))));
356
357 if (locwarn) {
358#ifdef LC_ALL
359
360 PerlIO_printf(Perl_error_log,
361 "perl: warning: Setting locale failed.\n");
362
363#else /* !LC_ALL */
364
365 PerlIO_printf(Perl_error_log,
366 "perl: warning: Setting locale failed for the categories:\n\t");
367#ifdef USE_LOCALE_CTYPE
368 if (! curctype)
369 PerlIO_printf(Perl_error_log, "LC_CTYPE ");
370#endif /* USE_LOCALE_CTYPE */
371#ifdef USE_LOCALE_COLLATE
372 if (! curcoll)
373 PerlIO_printf(Perl_error_log, "LC_COLLATE ");
374#endif /* USE_LOCALE_COLLATE */
375#ifdef USE_LOCALE_NUMERIC
376 if (! curnum)
377 PerlIO_printf(Perl_error_log, "LC_NUMERIC ");
378#endif /* USE_LOCALE_NUMERIC */
379 PerlIO_printf(Perl_error_log, "\n");
380
381#endif /* LC_ALL */
382
383 PerlIO_printf(Perl_error_log,
384 "perl: warning: Please check that your locale settings:\n");
385
386#ifdef __GLIBC__
387 PerlIO_printf(Perl_error_log,
388 "\tLANGUAGE = %c%s%c,\n",
389 language ? '"' : '(',
390 language ? language : "unset",
391 language ? '"' : ')');
392#endif
393
394 PerlIO_printf(Perl_error_log,
395 "\tLC_ALL = %c%s%c,\n",
396 lc_all ? '"' : '(',
397 lc_all ? lc_all : "unset",
398 lc_all ? '"' : ')');
399
400#if defined(USE_ENVIRON_ARRAY)
401 {
402 char **e;
403 for (e = environ; *e; e++) {
404 if (strnEQ(*e, "LC_", 3)
405 && strnNE(*e, "LC_ALL=", 7)
406 && (p = strchr(*e, '=')))
407 PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n",
408 (int)(p - *e), *e, p + 1);
409 }
410 }
411#else
412 PerlIO_printf(Perl_error_log,
413 "\t(possibly more locale environment variables)\n");
414#endif
415
416 PerlIO_printf(Perl_error_log,
417 "\tLANG = %c%s%c\n",
418 lang ? '"' : '(',
419 lang ? lang : "unset",
420 lang ? '"' : ')');
421
422 PerlIO_printf(Perl_error_log,
423 " are supported and installed on your system.\n");
424 }
425
426#ifdef LC_ALL
427
428 if (setlocale(LC_ALL, "C")) {
429 if (locwarn)
430 PerlIO_printf(Perl_error_log,
431 "perl: warning: Falling back to the standard locale (\"C\").\n");
432 ok = 0;
433 }
434 else {
435 if (locwarn)
436 PerlIO_printf(Perl_error_log,
437 "perl: warning: Failed to fall back to the standard locale (\"C\").\n");
438 ok = -1;
439 }
440
441#else /* ! LC_ALL */
442
443 if (0
444#ifdef USE_LOCALE_CTYPE
445 || !(curctype || setlocale(LC_CTYPE, "C"))
446#endif /* USE_LOCALE_CTYPE */
447#ifdef USE_LOCALE_COLLATE
448 || !(curcoll || setlocale(LC_COLLATE, "C"))
449#endif /* USE_LOCALE_COLLATE */
450#ifdef USE_LOCALE_NUMERIC
451 || !(curnum || setlocale(LC_NUMERIC, "C"))
452#endif /* USE_LOCALE_NUMERIC */
453 )
454 {
455 if (locwarn)
456 PerlIO_printf(Perl_error_log,
457 "perl: warning: Cannot fall back to the standard locale (\"C\").\n");
458 ok = -1;
459 }
460
461#endif /* ! LC_ALL */
462
463#ifdef USE_LOCALE_CTYPE
56279a21 464 Safefree(curctype);
bd61b366 465 curctype = savepv(setlocale(LC_CTYPE, NULL));
98994639
HS
466#endif /* USE_LOCALE_CTYPE */
467#ifdef USE_LOCALE_COLLATE
56279a21 468 Safefree(curcoll);
bd61b366 469 curcoll = savepv(setlocale(LC_COLLATE, NULL));
98994639
HS
470#endif /* USE_LOCALE_COLLATE */
471#ifdef USE_LOCALE_NUMERIC
56279a21 472 Safefree(curnum);
bd61b366 473 curnum = savepv(setlocale(LC_NUMERIC, NULL));
98994639
HS
474#endif /* USE_LOCALE_NUMERIC */
475 }
476 else {
477
478#ifdef USE_LOCALE_CTYPE
479 new_ctype(curctype);
480#endif /* USE_LOCALE_CTYPE */
481
482#ifdef USE_LOCALE_COLLATE
483 new_collate(curcoll);
484#endif /* USE_LOCALE_COLLATE */
485
486#ifdef USE_LOCALE_NUMERIC
487 new_numeric(curnum);
488#endif /* USE_LOCALE_NUMERIC */
b310b053 489
98994639
HS
490 }
491
492#endif /* USE_LOCALE */
493
ec71e770 494#ifdef USE_PERLIO
b310b053 495 {
fde18df1 496 /* Set PL_utf8locale to TRUE if using PerlIO _and_
ec71e770 497 any of the following are true:
085a54d9 498 - nl_langinfo(CODESET) contains /^utf-?8/i
61de9fb5 499 - $ENV{LC_ALL} contains /^utf-?8/i
085a54d9 500 - $ENV{LC_CTYPE} contains /^utf-?8/i
61de9fb5
JH
501 - $ENV{LANG} contains /^utf-?8/i
502 The LC_ALL, LC_CTYPE, LANG obey the usual override
503 hierarchy of locale environment variables. (LANGUAGE
504 affects only LC_MESSAGES only under glibc.) (If present,
505 it overrides LC_MESSAGES for GNU gettext, and it also
506 can have more than one locale, separated by spaces,
507 in case you need to know.)
8aa8f774 508 If PL_utf8locale and PL_unicode (set by -C or by $ENV{PERL_UNICODE})
a05d7ebb 509 are true, perl.c:S_parse_body() will turn on the PerlIO :utf8 layer
fde18df1 510 on STDIN, STDOUT, STDERR, _and_ the default open discipline.
085a54d9 511 */
fde18df1 512 bool utf8locale = FALSE;
b310b053
JH
513 char *codeset = NULL;
514#if defined(HAS_NL_LANGINFO) && defined(CODESET)
515 codeset = nl_langinfo(CODESET);
516#endif
61de9fb5 517 if (codeset)
89529cee
GA
518 utf8locale = (Perl_ibcmp(aTHX_ codeset, STR_WITH_LEN("UTF-8")) == 0 ||
519 Perl_ibcmp(aTHX_ codeset, STR_WITH_LEN("UTF8") ) == 0);
077a72a9 520#if defined(USE_LOCALE)
61de9fb5
JH
521 else { /* nl_langinfo(CODESET) is supposed to correctly
522 * interpret the locale environment variables,
523 * but just in case it fails, let's do this manually. */
524 if (lang)
89529cee
GA
525 utf8locale = (Perl_ibcmp(aTHX_ lang, STR_WITH_LEN("UTF-8")) == 0 ||
526 Perl_ibcmp(aTHX_ lang, STR_WITH_LEN("UTF8") ) == 0);
b310b053 527#ifdef USE_LOCALE_CTYPE
61de9fb5 528 if (curctype)
89529cee
GA
529 utf8locale = (Perl_ibcmp(aTHX_ curctype, STR_WITH_LEN("UTF-8")) == 0 ||
530 Perl_ibcmp(aTHX_ curctype, STR_WITH_LEN("UTF8") ) == 0);
b310b053 531#endif
61de9fb5 532 if (lc_all)
89529cee
GA
533 utf8locale = (Perl_ibcmp(aTHX_ lc_all, STR_WITH_LEN("UTF-8")) == 0 ||
534 Perl_ibcmp(aTHX_ lc_all, STR_WITH_LEN("UTF8") ) == 0);
61de9fb5 535 }
fde18df1
JH
536#endif /* USE_LOCALE */
537 if (utf8locale)
538 PL_utf8locale = TRUE;
539 }
a05d7ebb 540 /* Set PL_unicode to $ENV{PERL_UNICODE} if using PerlIO.
fde18df1
JH
541 This is an alternative to using the -C command line switch
542 (the -C if present will override this). */
543 {
dd374669 544 const char *p = PerlEnv_getenv("PERL_UNICODE");
a05d7ebb 545 PL_unicode = p ? parse_unicode_opts(&p) : 0;
5a22a2bb
NC
546 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
547 PL_utf8cache = -1;
b310b053 548 }
ec71e770 549#endif
b310b053 550
98994639 551#ifdef USE_LOCALE_CTYPE
43c5f42d 552 Safefree(curctype);
98994639
HS
553#endif /* USE_LOCALE_CTYPE */
554#ifdef USE_LOCALE_COLLATE
43c5f42d 555 Safefree(curcoll);
98994639
HS
556#endif /* USE_LOCALE_COLLATE */
557#ifdef USE_LOCALE_NUMERIC
43c5f42d 558 Safefree(curnum);
98994639
HS
559#endif /* USE_LOCALE_NUMERIC */
560 return ok;
561}
562
98994639
HS
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
HS
573char *
574Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen)
575{
97aff369 576 dVAR;
98994639
HS
577 char *xbuf;
578 STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */
579
580 /* the first sizeof(collationix) bytes are used by sv_collxfrm(). */
581 /* the +1 is for the terminating NUL. */
582
583 xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1;
a02a5408 584 Newx(xbuf, xAlloc, char);
98994639
HS
585 if (! xbuf)
586 goto bad;
587
588 *(U32*)xbuf = PL_collation_ix;
589 xout = sizeof(PL_collation_ix);
590 for (xin = 0; xin < len; ) {
224e8ef5 591 Size_t xused;
98994639
HS
592
593 for (;;) {
594 xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout);
224e8ef5 595 if (xused >= PERL_INT_MAX)
98994639 596 goto bad;
eb160463 597 if ((STRLEN)xused < xAlloc - xout)
98994639
HS
598 break;
599 xAlloc = (2 * xAlloc) + 1;
600 Renew(xbuf, xAlloc, char);
601 if (! xbuf)
602 goto bad;
603 }
604
605 xin += strlen(s + xin) + 1;
606 xout += xused;
607
608 /* Embedded NULs are understood but silently skipped
609 * because they make no sense in locale collation. */
610 }
611
612 xbuf[xout] = '\0';
613 *xlen = xout - sizeof(PL_collation_ix);
614 return xbuf;
615
616 bad:
617 Safefree(xbuf);
618 *xlen = 0;
619 return NULL;
620}
621
622#endif /* USE_LOCALE_COLLATE */
623
66610fdd
RGS
624/*
625 * Local variables:
626 * c-indentation-style: bsd
627 * c-basic-offset: 4
628 * indent-tabs-mode: t
629 * End:
630 *
37442d52
RGS
631 * ex: set ts=8 sts=4 sw=4 noet:
632 */