| 1 | /* locale.c |
| 2 | * |
| 3 | * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 4 | * 2002, 2003, 2005, 2006, 2007, 2008 by Larry Wall and others |
| 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 | * [p.238 of _The Lord of the Rings_, II/i: "Many Meetings"] |
| 21 | */ |
| 22 | |
| 23 | /* utility functions for handling locale-specific stuff like what |
| 24 | * character represents the decimal point. |
| 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. |
| 33 | */ |
| 34 | |
| 35 | #include "EXTERN.h" |
| 36 | #define PERL_IN_LOCALE_C |
| 37 | #include "perl.h" |
| 38 | |
| 39 | #ifdef I_LANGINFO |
| 40 | # include <langinfo.h> |
| 41 | #endif |
| 42 | |
| 43 | #include "reentr.h" |
| 44 | |
| 45 | #ifdef USE_LOCALE |
| 46 | |
| 47 | /* |
| 48 | * Standardize the locale name from a string returned by 'setlocale', possibly |
| 49 | * modifying that string. |
| 50 | * |
| 51 | * The typical return value of setlocale() is either |
| 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, |
| 55 | * in some unspecified order). This is not handled by this function. |
| 56 | * |
| 57 | * In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n", |
| 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 '=' |
| 60 | * |
| 61 | */ |
| 62 | STATIC char * |
| 63 | S_stdize_locale(pTHX_ char *locs) |
| 64 | { |
| 65 | const char * const s = strchr(locs, '='); |
| 66 | bool okay = TRUE; |
| 67 | |
| 68 | PERL_ARGS_ASSERT_STDIZE_LOCALE; |
| 69 | |
| 70 | if (s) { |
| 71 | const char * const t = strchr(s, '.'); |
| 72 | okay = FALSE; |
| 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; |
| 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 | |
| 90 | #endif |
| 91 | |
| 92 | void |
| 93 | Perl_set_numeric_radix(pTHX) |
| 94 | { |
| 95 | #ifdef USE_LOCALE_NUMERIC |
| 96 | dVAR; |
| 97 | # ifdef HAS_LOCALECONV |
| 98 | const struct lconv* const lc = localeconv(); |
| 99 | |
| 100 | if (lc && lc->decimal_point) { |
| 101 | if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) { |
| 102 | SvREFCNT_dec(PL_numeric_radix_sv); |
| 103 | PL_numeric_radix_sv = NULL; |
| 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); |
| 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 | } |
| 116 | } |
| 117 | } |
| 118 | else |
| 119 | PL_numeric_radix_sv = NULL; |
| 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 | |
| 126 | # endif /* HAS_LOCALECONV */ |
| 127 | #endif /* USE_LOCALE_NUMERIC */ |
| 128 | } |
| 129 | |
| 130 | void |
| 131 | Perl_new_numeric(pTHX_ const char *newnum) |
| 132 | { |
| 133 | #ifdef USE_LOCALE_NUMERIC |
| 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 | |
| 163 | char *save_newnum; |
| 164 | dVAR; |
| 165 | |
| 166 | if (! newnum) { |
| 167 | Safefree(PL_numeric_name); |
| 168 | PL_numeric_name = NULL; |
| 169 | PL_numeric_standard = TRUE; |
| 170 | PL_numeric_local = TRUE; |
| 171 | return; |
| 172 | } |
| 173 | |
| 174 | save_newnum = stdize_locale(savepv(newnum)); |
| 175 | if (! PL_numeric_name || strNE(PL_numeric_name, save_newnum)) { |
| 176 | Safefree(PL_numeric_name); |
| 177 | PL_numeric_name = save_newnum; |
| 178 | } |
| 179 | |
| 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(); |
| 184 | |
| 185 | #endif /* USE_LOCALE_NUMERIC */ |
| 186 | } |
| 187 | |
| 188 | void |
| 189 | Perl_set_numeric_standard(pTHX) |
| 190 | { |
| 191 | #ifdef USE_LOCALE_NUMERIC |
| 192 | dVAR; |
| 193 | |
| 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 | |
| 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 | } |
| 204 | DEBUG_L(PerlIO_printf(Perl_debug_log, |
| 205 | "Underlying LC_NUMERIC locale now is C\n")); |
| 206 | |
| 207 | #endif /* USE_LOCALE_NUMERIC */ |
| 208 | } |
| 209 | |
| 210 | void |
| 211 | Perl_set_numeric_local(pTHX) |
| 212 | { |
| 213 | #ifdef USE_LOCALE_NUMERIC |
| 214 | dVAR; |
| 215 | |
| 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 | |
| 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 | } |
| 226 | DEBUG_L(PerlIO_printf(Perl_debug_log, |
| 227 | "Underlying LC_NUMERIC locale now is %s\n", |
| 228 | PL_numeric_name)); |
| 229 | |
| 230 | #endif /* USE_LOCALE_NUMERIC */ |
| 231 | } |
| 232 | |
| 233 | /* |
| 234 | * Set up for a new ctype locale. |
| 235 | */ |
| 236 | void |
| 237 | Perl_new_ctype(pTHX_ const char *newctype) |
| 238 | { |
| 239 | #ifdef USE_LOCALE_CTYPE |
| 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 | |
| 252 | dVAR; |
| 253 | UV i; |
| 254 | |
| 255 | PERL_ARGS_ASSERT_NEW_CTYPE; |
| 256 | |
| 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 { |
| 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 | } |
| 273 | } |
| 274 | |
| 275 | #endif /* USE_LOCALE_CTYPE */ |
| 276 | PERL_ARGS_ASSERT_NEW_CTYPE; |
| 277 | PERL_UNUSED_ARG(newctype); |
| 278 | PERL_UNUSED_CONTEXT; |
| 279 | } |
| 280 | |
| 281 | void |
| 282 | Perl_new_collate(pTHX_ const char *newcoll) |
| 283 | { |
| 284 | #ifdef USE_LOCALE_COLLATE |
| 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 | |
| 294 | dVAR; |
| 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)); |
| 312 | PL_collation_standard = ((*newcoll == 'C' && newcoll[1] == '\0') |
| 313 | || strEQ(newcoll, "POSIX")); |
| 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]; |
| 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; |
| 323 | if (mult < 1 && !(fa == 0 && fb == 0)) |
| 324 | Perl_croak(aTHX_ "panic: strxfrm() gets absurd - a => %"UVuf", ab => %"UVuf, |
| 325 | (UV) fa, (UV) fb); |
| 326 | PL_collxfrm_base = (fa > (Size_t)mult) ? (fa - mult) : 0; |
| 327 | PL_collxfrm_mult = mult; |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | #endif /* USE_LOCALE_COLLATE */ |
| 332 | } |
| 333 | |
| 334 | #ifdef WIN32 |
| 335 | |
| 336 | char * |
| 337 | Perl_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 | |
| 351 | bool override_LC_ALL = 0; |
| 352 | char * result; |
| 353 | |
| 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: |
| 362 | override_LC_ALL = TRUE; |
| 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"); |
| 402 | if (! locale) { |
| 403 | locale = ""; |
| 404 | } |
| 405 | } |
| 406 | # ifdef LC_ALL |
| 407 | } |
| 408 | # endif |
| 409 | } |
| 410 | |
| 411 | result = setlocale(category, locale); |
| 412 | |
| 413 | if (! override_LC_ALL) { |
| 414 | return result; |
| 415 | } |
| 416 | |
| 417 | /* Here the input locale was LC_ALL, and we have set it to what is in the |
| 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) */ |
| 422 | # ifdef USE_LOCALE_TIME |
| 423 | result = PerlEnv_getenv("LC_TIME"); |
| 424 | if (result && strNE(result, "")) { |
| 425 | setlocale(LC_TIME, result); |
| 426 | } |
| 427 | # endif |
| 428 | # ifdef USE_LOCALE_CTYPE |
| 429 | result = PerlEnv_getenv("LC_CTYPE"); |
| 430 | if (result && strNE(result, "")) { |
| 431 | setlocale(LC_CTYPE, result); |
| 432 | } |
| 433 | # endif |
| 434 | # ifdef USE_LOCALE_COLLATE |
| 435 | result = PerlEnv_getenv("LC_COLLATE"); |
| 436 | if (result && strNE(result, "")) { |
| 437 | setlocale(LC_COLLATE, result); |
| 438 | } |
| 439 | # endif |
| 440 | # ifdef USE_LOCALE_MONETARY |
| 441 | result = PerlEnv_getenv("LC_MONETARY"); |
| 442 | if (result && strNE(result, "")) { |
| 443 | setlocale(LC_MONETARY, result); |
| 444 | } |
| 445 | # endif |
| 446 | # ifdef USE_LOCALE_NUMERIC |
| 447 | result = PerlEnv_getenv("LC_NUMERIC"); |
| 448 | if (result && strNE(result, "")) { |
| 449 | setlocale(LC_NUMERIC, result); |
| 450 | } |
| 451 | # endif |
| 452 | # ifdef USE_LOCALE_MESSAGES |
| 453 | result = PerlEnv_getenv("LC_MESSAGES"); |
| 454 | if (result && strNE(result, "")) { |
| 455 | setlocale(LC_MESSAGES, result); |
| 456 | } |
| 457 | # endif |
| 458 | |
| 459 | return setlocale(LC_ALL, NULL); |
| 460 | |
| 461 | } |
| 462 | |
| 463 | #endif |
| 464 | |
| 465 | |
| 466 | /* |
| 467 | * Initialize locale awareness. |
| 468 | */ |
| 469 | int |
| 470 | Perl_init_i18nl10n(pTHX_ int printwarn) |
| 471 | { |
| 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 |
| 479 | * 1 = set ok or not applicable, |
| 480 | * 0 = fallback to a locale of lower priority |
| 481 | * -1 = fallback to all locales failed, not even to the C locale |
| 482 | */ |
| 483 | |
| 484 | int ok = 1; |
| 485 | |
| 486 | #if defined(USE_LOCALE) |
| 487 | dVAR; |
| 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__ |
| 499 | char * const language = PerlEnv_getenv("LANGUAGE"); |
| 500 | #endif |
| 501 | |
| 502 | /* NULL uses the existing already set up locale */ |
| 503 | const char * const setlocale_init = (PerlEnv_getenv("PERL_SKIP_LOCALE_INIT")) |
| 504 | ? NULL |
| 505 | : ""; |
| 506 | const char* trial_locales[5]; /* 5 = 1 each for "", LC_ALL, LANG, "", C */ |
| 507 | unsigned int trial_locales_count; |
| 508 | char * const lc_all = PerlEnv_getenv("LC_ALL"); |
| 509 | char * const lang = PerlEnv_getenv("LANG"); |
| 510 | bool setlocale_failure = FALSE; |
| 511 | unsigned int i; |
| 512 | char *p; |
| 513 | const bool locwarn = (printwarn > 1 || |
| 514 | (printwarn && |
| 515 | (!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p)))); |
| 516 | bool done = FALSE; |
| 517 | const char *system_default_locale = NULL; |
| 518 | |
| 519 | |
| 520 | #ifndef LOCALE_ENVIRON_REQUIRED |
| 521 | PERL_UNUSED_VAR(done); |
| 522 | #else |
| 523 | |
| 524 | /* |
| 525 | * Ultrix setlocale(..., "") fails if there are no environment |
| 526 | * variables from which to get a locale name. |
| 527 | */ |
| 528 | |
| 529 | # ifdef LC_ALL |
| 530 | if (lang) { |
| 531 | if (my_setlocale(LC_ALL, setlocale_init)) |
| 532 | done = TRUE; |
| 533 | else |
| 534 | setlocale_failure = TRUE; |
| 535 | } |
| 536 | if (!setlocale_failure) { |
| 537 | # ifdef USE_LOCALE_CTYPE |
| 538 | Safefree(curctype); |
| 539 | if (! (curctype = |
| 540 | my_setlocale(LC_CTYPE, |
| 541 | (!done && (lang || PerlEnv_getenv("LC_CTYPE"))) |
| 542 | ? setlocale_init : NULL))) |
| 543 | setlocale_failure = TRUE; |
| 544 | else |
| 545 | curctype = savepv(curctype); |
| 546 | # endif /* USE_LOCALE_CTYPE */ |
| 547 | # ifdef USE_LOCALE_COLLATE |
| 548 | Safefree(curcoll); |
| 549 | if (! (curcoll = |
| 550 | my_setlocale(LC_COLLATE, |
| 551 | (!done && (lang || PerlEnv_getenv("LC_COLLATE"))) |
| 552 | ? setlocale_init : NULL))) |
| 553 | setlocale_failure = TRUE; |
| 554 | else |
| 555 | curcoll = savepv(curcoll); |
| 556 | # endif /* USE_LOCALE_COLLATE */ |
| 557 | # ifdef USE_LOCALE_NUMERIC |
| 558 | Safefree(curnum); |
| 559 | if (! (curnum = |
| 560 | my_setlocale(LC_NUMERIC, |
| 561 | (!done && (lang || PerlEnv_getenv("LC_NUMERIC"))) |
| 562 | ? setlocale_init : NULL))) |
| 563 | setlocale_failure = TRUE; |
| 564 | else |
| 565 | curnum = savepv(curnum); |
| 566 | # endif /* USE_LOCALE_NUMERIC */ |
| 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 */ |
| 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 */ |
| 583 | } |
| 584 | |
| 585 | # endif /* LC_ALL */ |
| 586 | |
| 587 | #endif /* !LOCALE_ENVIRON_REQUIRED */ |
| 588 | |
| 589 | /* We try each locale in the list until we get one that works, or exhaust |
| 590 | * the list */ |
| 591 | trial_locales[0] = setlocale_init; |
| 592 | trial_locales_count = 1; |
| 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 | |
| 630 | #ifdef LC_ALL |
| 631 | if (! my_setlocale(LC_ALL, trial_locale)) { |
| 632 | setlocale_failure = TRUE; |
| 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 | } |
| 644 | #endif /* LC_ALL */ |
| 645 | |
| 646 | if (!setlocale_failure) { |
| 647 | #ifdef USE_LOCALE_CTYPE |
| 648 | Safefree(curctype); |
| 649 | if (! (curctype = my_setlocale(LC_CTYPE, trial_locale))) |
| 650 | setlocale_failure = TRUE; |
| 651 | else |
| 652 | curctype = savepv(curctype); |
| 653 | #endif /* USE_LOCALE_CTYPE */ |
| 654 | #ifdef USE_LOCALE_COLLATE |
| 655 | Safefree(curcoll); |
| 656 | if (! (curcoll = my_setlocale(LC_COLLATE, trial_locale))) |
| 657 | setlocale_failure = TRUE; |
| 658 | else |
| 659 | curcoll = savepv(curcoll); |
| 660 | #endif /* USE_LOCALE_COLLATE */ |
| 661 | #ifdef USE_LOCALE_NUMERIC |
| 662 | Safefree(curnum); |
| 663 | if (! (curnum = my_setlocale(LC_NUMERIC, trial_locale))) |
| 664 | setlocale_failure = TRUE; |
| 665 | else |
| 666 | curnum = savepv(curnum); |
| 667 | #endif /* USE_LOCALE_NUMERIC */ |
| 668 | #ifdef USE_LOCALE_MESSAGES |
| 669 | if (! (my_setlocale(LC_MESSAGES, trial_locale))) |
| 670 | setlocale_failure = TRUE; |
| 671 | #endif /* USE_LOCALE_MESSAGES */ |
| 672 | #ifdef USE_LOCALE_MONETARY |
| 673 | if (! (my_setlocale(LC_MONETARY, trial_locale))) |
| 674 | setlocale_failure = TRUE; |
| 675 | #endif /* USE_LOCALE_MONETARY */ |
| 676 | |
| 677 | if (! setlocale_failure) { /* Success */ |
| 678 | break; |
| 679 | } |
| 680 | } |
| 681 | |
| 682 | /* Here, something failed; will need to try a fallback. */ |
| 683 | ok = 0; |
| 684 | |
| 685 | if (i == 0) { |
| 686 | unsigned int j; |
| 687 | |
| 688 | if (locwarn) { /* Output failure info only on the first one */ |
| 689 | #ifdef LC_ALL |
| 690 | |
| 691 | PerlIO_printf(Perl_error_log, |
| 692 | "perl: warning: Setting locale failed.\n"); |
| 693 | |
| 694 | #else /* !LC_ALL */ |
| 695 | |
| 696 | PerlIO_printf(Perl_error_log, |
| 697 | "perl: warning: Setting locale failed for the categories:\n\t"); |
| 698 | #ifdef USE_LOCALE_CTYPE |
| 699 | if (! curctype) |
| 700 | PerlIO_printf(Perl_error_log, "LC_CTYPE "); |
| 701 | #endif /* USE_LOCALE_CTYPE */ |
| 702 | #ifdef USE_LOCALE_COLLATE |
| 703 | if (! curcoll) |
| 704 | PerlIO_printf(Perl_error_log, "LC_COLLATE "); |
| 705 | #endif /* USE_LOCALE_COLLATE */ |
| 706 | #ifdef USE_LOCALE_NUMERIC |
| 707 | if (! curnum) |
| 708 | PerlIO_printf(Perl_error_log, "LC_NUMERIC "); |
| 709 | #endif /* USE_LOCALE_NUMERIC */ |
| 710 | PerlIO_printf(Perl_error_log, "and possibly others\n"); |
| 711 | |
| 712 | #endif /* LC_ALL */ |
| 713 | |
| 714 | PerlIO_printf(Perl_error_log, |
| 715 | "perl: warning: Please check that your locale settings:\n"); |
| 716 | |
| 717 | #ifdef __GLIBC__ |
| 718 | PerlIO_printf(Perl_error_log, |
| 719 | "\tLANGUAGE = %c%s%c,\n", |
| 720 | language ? '"' : '(', |
| 721 | language ? language : "unset", |
| 722 | language ? '"' : ')'); |
| 723 | #endif |
| 724 | |
| 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 ? '"' : ')'); |
| 730 | |
| 731 | #if defined(USE_ENVIRON_ARRAY) |
| 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 | } |
| 742 | #else |
| 743 | PerlIO_printf(Perl_error_log, |
| 744 | "\t(possibly more locale environment variables)\n"); |
| 745 | #endif |
| 746 | |
| 747 | PerlIO_printf(Perl_error_log, |
| 748 | "\tLANG = %c%s%c\n", |
| 749 | lang ? '"' : '(', |
| 750 | lang ? lang : "unset", |
| 751 | lang ? '"' : ')'); |
| 752 | |
| 753 | PerlIO_printf(Perl_error_log, |
| 754 | " are supported and installed on your system.\n"); |
| 755 | } |
| 756 | |
| 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: |
| 776 | |
| 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"; |
| 803 | |
| 804 | done_C: ; |
| 805 | } /* end of first time through the loop */ |
| 806 | |
| 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 */ |
| 819 | |
| 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--; |
| 823 | |
| 824 | ok = -1; |
| 825 | msg = "Failed to fall back to"; |
| 826 | |
| 827 | /* To continue, we should use whatever values we've got */ |
| 828 | #ifdef USE_LOCALE_CTYPE |
| 829 | Safefree(curctype); |
| 830 | curctype = savepv(setlocale(LC_CTYPE, NULL)); |
| 831 | #endif /* USE_LOCALE_CTYPE */ |
| 832 | #ifdef USE_LOCALE_COLLATE |
| 833 | Safefree(curcoll); |
| 834 | curcoll = savepv(setlocale(LC_COLLATE, NULL)); |
| 835 | #endif /* USE_LOCALE_COLLATE */ |
| 836 | #ifdef USE_LOCALE_NUMERIC |
| 837 | Safefree(curnum); |
| 838 | curnum = savepv(setlocale(LC_NUMERIC, NULL)); |
| 839 | #endif /* USE_LOCALE_NUMERIC */ |
| 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 */ |
| 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 */ |
| 881 | |
| 882 | #if defined(USE_PERLIO) && defined(USE_LOCALE_CTYPE) |
| 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 | |
| 890 | /* Set PL_unicode to $ENV{PERL_UNICODE} if using PerlIO. |
| 891 | This is an alternative to using the -C command line switch |
| 892 | (the -C if present will override this). */ |
| 893 | { |
| 894 | const char *p = PerlEnv_getenv("PERL_UNICODE"); |
| 895 | PL_unicode = p ? parse_unicode_opts(&p) : 0; |
| 896 | if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG) |
| 897 | PL_utf8cache = -1; |
| 898 | } |
| 899 | #endif |
| 900 | |
| 901 | #ifdef USE_LOCALE_CTYPE |
| 902 | Safefree(curctype); |
| 903 | #endif /* USE_LOCALE_CTYPE */ |
| 904 | #ifdef USE_LOCALE_COLLATE |
| 905 | Safefree(curcoll); |
| 906 | #endif /* USE_LOCALE_COLLATE */ |
| 907 | #ifdef USE_LOCALE_NUMERIC |
| 908 | Safefree(curnum); |
| 909 | #endif /* USE_LOCALE_NUMERIC */ |
| 910 | |
| 911 | #endif /* USE_LOCALE */ |
| 912 | |
| 913 | return ok; |
| 914 | } |
| 915 | |
| 916 | |
| 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 | */ |
| 926 | |
| 927 | char * |
| 928 | Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen) |
| 929 | { |
| 930 | dVAR; |
| 931 | char *xbuf; |
| 932 | STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */ |
| 933 | |
| 934 | PERL_ARGS_ASSERT_MEM_COLLXFRM; |
| 935 | |
| 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; |
| 940 | Newx(xbuf, xAlloc, char); |
| 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; ) { |
| 947 | Size_t xused; |
| 948 | |
| 949 | for (;;) { |
| 950 | xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout); |
| 951 | if (xused >= PERL_INT_MAX) |
| 952 | goto bad; |
| 953 | if ((STRLEN)xused < xAlloc - xout) |
| 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 | |
| 980 | #ifdef USE_LOCALE |
| 981 | |
| 982 | STATIC bool |
| 983 | S_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 |
| 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. */ |
| 990 | |
| 991 | char *save_input_locale = NULL; |
| 992 | STRLEN final_pos; |
| 993 | |
| 994 | #ifdef LC_ALL |
| 995 | assert(category != LC_ALL); |
| 996 | #endif |
| 997 | |
| 998 | /* First dispose of the trivial cases */ |
| 999 | save_input_locale = setlocale(category, NULL); |
| 1000 | if (! save_input_locale) { |
| 1001 | DEBUG_L(PerlIO_printf(Perl_debug_log, |
| 1002 | "Could not find current locale for category %d\n", |
| 1003 | category)); |
| 1004 | return FALSE; /* XXX maybe should croak */ |
| 1005 | } |
| 1006 | save_input_locale = stdize_locale(savepv(save_input_locale)); |
| 1007 | if ((*save_input_locale == 'C' && save_input_locale[1] == '\0') |
| 1008 | || strEQ(save_input_locale, "POSIX")) |
| 1009 | { |
| 1010 | DEBUG_L(PerlIO_printf(Perl_debug_log, |
| 1011 | "Current locale for category %d is %s\n", |
| 1012 | category, save_input_locale)); |
| 1013 | Safefree(save_input_locale); |
| 1014 | return FALSE; |
| 1015 | } |
| 1016 | |
| 1017 | #if defined(USE_LOCALE_CTYPE) \ |
| 1018 | && (defined(MB_CUR_MAX) || (defined(HAS_NL_LANGINFO) && defined(CODESET))) |
| 1019 | |
| 1020 | { /* Next try nl_langinfo or MB_CUR_MAX if available */ |
| 1021 | |
| 1022 | char *save_ctype_locale = NULL; |
| 1023 | bool is_utf8; |
| 1024 | |
| 1025 | if (category != LC_CTYPE) { /* These work only on LC_CTYPE */ |
| 1026 | |
| 1027 | /* Get the current LC_CTYPE locale */ |
| 1028 | save_ctype_locale = stdize_locale(savepv(setlocale(LC_CTYPE, NULL))); |
| 1029 | if (! save_ctype_locale) { |
| 1030 | DEBUG_L(PerlIO_printf(Perl_debug_log, |
| 1031 | "Could not find current locale for LC_CTYPE\n")); |
| 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)) { |
| 1044 | DEBUG_L(PerlIO_printf(Perl_debug_log, |
| 1045 | "Could not change LC_CTYPE locale to %s\n", |
| 1046 | save_input_locale)); |
| 1047 | Safefree(save_ctype_locale); |
| 1048 | goto cant_use_nllanginfo; |
| 1049 | } |
| 1050 | } |
| 1051 | |
| 1052 | DEBUG_L(PerlIO_printf(Perl_debug_log, "Current LC_CTYPE locale=%s\n", |
| 1053 | save_input_locale)); |
| 1054 | |
| 1055 | /* Here the current LC_CTYPE is set to the locale of the category whose |
| 1056 | * information is desired. This means that nl_langinfo() and MB_CUR_MAX |
| 1057 | * should give the correct results */ |
| 1058 | |
| 1059 | # if defined(HAS_NL_LANGINFO) && defined(CODESET) |
| 1060 | { |
| 1061 | char *codeset = savepv(nl_langinfo(CODESET)); |
| 1062 | if (codeset && strNE(codeset, "")) { |
| 1063 | |
| 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 | |
| 1073 | DEBUG_L(PerlIO_printf(Perl_debug_log, |
| 1074 | "\tnllanginfo returned CODESET '%s'; ?UTF8 locale=%d\n", |
| 1075 | codeset, is_utf8)); |
| 1076 | Safefree(codeset); |
| 1077 | Safefree(save_input_locale); |
| 1078 | return is_utf8; |
| 1079 | } |
| 1080 | } |
| 1081 | |
| 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 | |
| 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 | |
| 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 | |
| 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; |
| 1108 | GCC_DIAG_IGNORE(-Wunused-result); |
| 1109 | (void) mbtowc(&wc, NULL, 0); /* Reset any shift state */ |
| 1110 | GCC_DIAG_RESTORE; |
| 1111 | errno = 0; |
| 1112 | if (mbtowc(&wc, HYPHEN_UTF8, strlen(HYPHEN_UTF8)) |
| 1113 | != strlen(HYPHEN_UTF8) |
| 1114 | || wc != (wchar_t) 0x2010) |
| 1115 | { |
| 1116 | is_utf8 = FALSE; |
| 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)); |
| 1121 | } |
| 1122 | } |
| 1123 | # endif |
| 1124 | |
| 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); |
| 1129 | } |
| 1130 | |
| 1131 | return is_utf8; |
| 1132 | # endif |
| 1133 | } |
| 1134 | |
| 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 |
| 1140 | * see if it matches qr/UTF -? 8 /ix */ |
| 1141 | |
| 1142 | final_pos = strlen(save_input_locale) - 1; |
| 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) |
| 1149 | { |
| 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); |
| 1164 | DEBUG_L(PerlIO_printf(Perl_debug_log, |
| 1165 | "Locale %s ends with UTF-8 in name\n", |
| 1166 | save_input_locale)); |
| 1167 | return TRUE; |
| 1168 | } |
| 1169 | } |
| 1170 | DEBUG_L(PerlIO_printf(Perl_debug_log, |
| 1171 | "Locale %s doesn't end with UTF-8 in name\n", |
| 1172 | save_input_locale)); |
| 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 | { |
| 1184 | Safefree(save_input_locale); |
| 1185 | DEBUG_L(PerlIO_printf(Perl_debug_log, |
| 1186 | "Locale %s ends with 10056 in name, is UTF-8 locale\n", |
| 1187 | save_input_locale)); |
| 1188 | return TRUE; |
| 1189 | } |
| 1190 | #endif |
| 1191 | |
| 1192 | /* Other common encodings are the ISO 8859 series, which aren't UTF-8 */ |
| 1193 | if (instr(save_input_locale, "8859")) { |
| 1194 | Safefree(save_input_locale); |
| 1195 | DEBUG_L(PerlIO_printf(Perl_debug_log, |
| 1196 | "Locale %s has 8859 in name, not UTF-8 locale\n", |
| 1197 | save_input_locale)); |
| 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) { |
| 1226 | DEBUG_L(PerlIO_printf(Perl_debug_log, |
| 1227 | "Could not find current locale for LC_MONETARY\n")); |
| 1228 | goto cant_use_monetary; |
| 1229 | } |
| 1230 | |
| 1231 | if (strNE(save_monetary_locale, save_input_locale)) { |
| 1232 | if (! setlocale(LC_MONETARY, save_input_locale)) { |
| 1233 | DEBUG_L(PerlIO_printf(Perl_debug_log, |
| 1234 | "Could not change LC_MONETARY locale to %s\n", |
| 1235 | save_input_locale)); |
| 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)) { |
| 1247 | DEBUG_L(PerlIO_printf(Perl_debug_log, |
| 1248 | "Currency symbol for %s is not legal UTF-8\n", |
| 1249 | save_input_locale)); |
| 1250 | illegal_utf8 = TRUE; |
| 1251 | } |
| 1252 | else if (is_ascii_string((U8 *) lc->currency_symbol, 0)) { |
| 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)); |
| 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 | * */ |
| 1271 | DEBUG_L(PerlIO_printf(Perl_debug_log, "\tis_utf8=%d\n", (illegal_utf8) |
| 1272 | ? FALSE |
| 1273 | : ! only_ascii)); |
| 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 | |
| 1360 | DEBUG_L(PerlIO_printf(Perl_debug_log, |
| 1361 | "Assuming locale %s is not a UTF-8 locale\n", |
| 1362 | save_input_locale)); |
| 1363 | Safefree(save_input_locale); |
| 1364 | return FALSE; |
| 1365 | } |
| 1366 | |
| 1367 | #endif |
| 1368 | |
| 1369 | /* |
| 1370 | * Local variables: |
| 1371 | * c-indentation-style: bsd |
| 1372 | * c-basic-offset: 4 |
| 1373 | * indent-tabs-mode: nil |
| 1374 | * End: |
| 1375 | * |
| 1376 | * ex: set ts=8 sts=4 sw=4 et: |
| 1377 | */ |