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| 98994639 |
1 | /* locale.c |
| 2 | * |
| 3 | * Copyright (c) 2001, Larry Wall |
| 4 | * |
| 5 | * You may distribute under the terms of either the GNU General Public |
| 6 | * License or the Artistic License, as specified in the README file. |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * A Elbereth Gilthoniel, |
| 12 | * silivren penna míriel |
| 13 | * o menel aglar elenath! |
| 14 | * Na-chaered palan-díriel |
| 15 | * o galadhremmin ennorath, |
| 16 | * Fanuilos, le linnathon |
| 17 | * nef aear, si nef aearon! |
| 18 | */ |
| 19 | |
| 20 | #include "EXTERN.h" |
| 21 | #define PERL_IN_LOCALE_C |
| 22 | #include "perl.h" |
| 23 | |
| 24 | #ifdef I_LOCALE |
| 25 | # include <locale.h> |
| 26 | #endif |
| 27 | |
| 28 | /* |
| 29 | * Standardize the locale name from a string returned by 'setlocale'. |
| 30 | * |
| 31 | * The standard return value of setlocale() is either |
| 32 | * (1) "xx_YY" if the first argument of setlocale() is not LC_ALL |
| 33 | * (2) "xa_YY xb_YY ..." if the first argument of setlocale() is LC_ALL |
| 34 | * (the space-separated values represent the various sublocales, |
| 35 | * in some unspecificed order) |
| 36 | * |
| 37 | * In some platforms it has a form like "LC_SOMETHING=Lang_Country.866\n", |
| 38 | * which is harmful for further use of the string in setlocale(). |
| 39 | * |
| 40 | */ |
| 41 | STATIC char * |
| 42 | S_stdize_locale(pTHX_ char *locs) |
| 43 | { |
| 44 | char *s; |
| 45 | bool okay = TRUE; |
| 46 | |
| 47 | if ((s = strchr(locs, '='))) { |
| 48 | char *t; |
| 49 | |
| 50 | okay = FALSE; |
| 51 | if ((t = strchr(s, '.'))) { |
| 52 | char *u; |
| 53 | |
| 54 | if ((u = strchr(t, '\n'))) { |
| 55 | |
| 56 | if (u[1] == 0) { |
| 57 | STRLEN len = u - s; |
| 58 | Move(s + 1, locs, len, char); |
| 59 | locs[len] = 0; |
| 60 | okay = TRUE; |
| 61 | } |
| 62 | } |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | if (!okay) |
| 67 | Perl_croak(aTHX_ "Can't fix broken locale name \"%s\"", locs); |
| 68 | |
| 69 | return locs; |
| 70 | } |
| 71 | |
| 72 | void |
| 73 | Perl_set_numeric_radix(pTHX) |
| 74 | { |
| 75 | #ifdef USE_LOCALE_NUMERIC |
| 76 | # ifdef HAS_LOCALECONV |
| 77 | struct lconv* lc; |
| 78 | |
| 79 | lc = localeconv(); |
| 80 | if (lc && lc->decimal_point) { |
| 81 | if (lc->decimal_point[0] == '.' && lc->decimal_point[1] == 0) { |
| 82 | SvREFCNT_dec(PL_numeric_radix_sv); |
| 83 | PL_numeric_radix_sv = Nullsv; |
| 84 | } |
| 85 | else { |
| 86 | if (PL_numeric_radix_sv) |
| 87 | sv_setpv(PL_numeric_radix_sv, lc->decimal_point); |
| 88 | else |
| 89 | PL_numeric_radix_sv = newSVpv(lc->decimal_point, 0); |
| 90 | } |
| 91 | } |
| 92 | else |
| 93 | PL_numeric_radix_sv = Nullsv; |
| 94 | # endif /* HAS_LOCALECONV */ |
| 95 | #endif /* USE_LOCALE_NUMERIC */ |
| 96 | } |
| 97 | |
| 98 | /* |
| 99 | * Set up for a new numeric locale. |
| 100 | */ |
| 101 | void |
| 102 | Perl_new_numeric(pTHX_ char *newnum) |
| 103 | { |
| 104 | #ifdef USE_LOCALE_NUMERIC |
| 105 | |
| 106 | if (! newnum) { |
| 107 | if (PL_numeric_name) { |
| 108 | Safefree(PL_numeric_name); |
| 109 | PL_numeric_name = NULL; |
| 110 | } |
| 111 | PL_numeric_standard = TRUE; |
| 112 | PL_numeric_local = TRUE; |
| 113 | return; |
| 114 | } |
| 115 | |
| 116 | if (! PL_numeric_name || strNE(PL_numeric_name, newnum)) { |
| 117 | Safefree(PL_numeric_name); |
| 118 | PL_numeric_name = stdize_locale(savepv(newnum)); |
| 119 | PL_numeric_standard = (strEQ(newnum, "C") || strEQ(newnum, "POSIX")); |
| 120 | PL_numeric_local = TRUE; |
| 121 | set_numeric_radix(); |
| 122 | } |
| 123 | |
| 124 | #endif /* USE_LOCALE_NUMERIC */ |
| 125 | } |
| 126 | |
| 127 | void |
| 128 | Perl_set_numeric_standard(pTHX) |
| 129 | { |
| 130 | #ifdef USE_LOCALE_NUMERIC |
| 131 | |
| 132 | if (! PL_numeric_standard) { |
| 133 | setlocale(LC_NUMERIC, "C"); |
| 134 | PL_numeric_standard = TRUE; |
| 135 | PL_numeric_local = FALSE; |
| 136 | set_numeric_radix(); |
| 137 | } |
| 138 | |
| 139 | #endif /* USE_LOCALE_NUMERIC */ |
| 140 | } |
| 141 | |
| 142 | void |
| 143 | Perl_set_numeric_local(pTHX) |
| 144 | { |
| 145 | #ifdef USE_LOCALE_NUMERIC |
| 146 | |
| 147 | if (! PL_numeric_local) { |
| 148 | setlocale(LC_NUMERIC, PL_numeric_name); |
| 149 | PL_numeric_standard = FALSE; |
| 150 | PL_numeric_local = TRUE; |
| 151 | set_numeric_radix(); |
| 152 | } |
| 153 | |
| 154 | #endif /* USE_LOCALE_NUMERIC */ |
| 155 | } |
| 156 | |
| 157 | /* |
| 158 | * Set up for a new ctype locale. |
| 159 | */ |
| 160 | void |
| 161 | Perl_new_ctype(pTHX_ char *newctype) |
| 162 | { |
| 163 | #ifdef USE_LOCALE_CTYPE |
| 164 | |
| 165 | int i; |
| 166 | |
| 167 | for (i = 0; i < 256; i++) { |
| 168 | if (isUPPER_LC(i)) |
| 169 | PL_fold_locale[i] = toLOWER_LC(i); |
| 170 | else if (isLOWER_LC(i)) |
| 171 | PL_fold_locale[i] = toUPPER_LC(i); |
| 172 | else |
| 173 | PL_fold_locale[i] = i; |
| 174 | } |
| 175 | |
| 176 | #endif /* USE_LOCALE_CTYPE */ |
| 177 | } |
| 178 | |
| 179 | /* |
| 180 | * Set up for a new collation locale. |
| 181 | */ |
| 182 | void |
| 183 | Perl_new_collate(pTHX_ char *newcoll) |
| 184 | { |
| 185 | #ifdef USE_LOCALE_COLLATE |
| 186 | |
| 187 | if (! newcoll) { |
| 188 | if (PL_collation_name) { |
| 189 | ++PL_collation_ix; |
| 190 | Safefree(PL_collation_name); |
| 191 | PL_collation_name = NULL; |
| 192 | } |
| 193 | PL_collation_standard = TRUE; |
| 194 | PL_collxfrm_base = 0; |
| 195 | PL_collxfrm_mult = 2; |
| 196 | return; |
| 197 | } |
| 198 | |
| 199 | if (! PL_collation_name || strNE(PL_collation_name, newcoll)) { |
| 200 | ++PL_collation_ix; |
| 201 | Safefree(PL_collation_name); |
| 202 | PL_collation_name = stdize_locale(savepv(newcoll)); |
| 203 | PL_collation_standard = (strEQ(newcoll, "C") || strEQ(newcoll, "POSIX")); |
| 204 | |
| 205 | { |
| 206 | /* 2: at most so many chars ('a', 'b'). */ |
| 207 | /* 50: surely no system expands a char more. */ |
| 208 | #define XFRMBUFSIZE (2 * 50) |
| 209 | char xbuf[XFRMBUFSIZE]; |
| 210 | Size_t fa = strxfrm(xbuf, "a", XFRMBUFSIZE); |
| 211 | Size_t fb = strxfrm(xbuf, "ab", XFRMBUFSIZE); |
| 212 | SSize_t mult = fb - fa; |
| 213 | if (mult < 1) |
| 214 | Perl_croak(aTHX_ "strxfrm() gets absurd"); |
| 215 | PL_collxfrm_base = (fa > mult) ? (fa - mult) : 0; |
| 216 | PL_collxfrm_mult = mult; |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | #endif /* USE_LOCALE_COLLATE */ |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * Initialize locale awareness. |
| 225 | */ |
| 226 | int |
| 227 | Perl_init_i18nl10n(pTHX_ int printwarn) |
| 228 | { |
| 229 | int ok = 1; |
| 230 | /* returns |
| 231 | * 1 = set ok or not applicable, |
| 232 | * 0 = fallback to C locale, |
| 233 | * -1 = fallback to C locale failed |
| 234 | */ |
| 235 | |
| 236 | #if defined(USE_LOCALE) |
| 237 | |
| 238 | #ifdef USE_LOCALE_CTYPE |
| 239 | char *curctype = NULL; |
| 240 | #endif /* USE_LOCALE_CTYPE */ |
| 241 | #ifdef USE_LOCALE_COLLATE |
| 242 | char *curcoll = NULL; |
| 243 | #endif /* USE_LOCALE_COLLATE */ |
| 244 | #ifdef USE_LOCALE_NUMERIC |
| 245 | char *curnum = NULL; |
| 246 | #endif /* USE_LOCALE_NUMERIC */ |
| 247 | #ifdef __GLIBC__ |
| 248 | char *language = PerlEnv_getenv("LANGUAGE"); |
| 249 | #endif |
| 250 | char *lc_all = PerlEnv_getenv("LC_ALL"); |
| 251 | char *lang = PerlEnv_getenv("LANG"); |
| 252 | bool setlocale_failure = FALSE; |
| 253 | |
| 254 | #ifdef LOCALE_ENVIRON_REQUIRED |
| 255 | |
| 256 | /* |
| 257 | * Ultrix setlocale(..., "") fails if there are no environment |
| 258 | * variables from which to get a locale name. |
| 259 | */ |
| 260 | |
| 261 | bool done = FALSE; |
| 262 | |
| 263 | #ifdef LC_ALL |
| 264 | if (lang) { |
| 265 | if (setlocale(LC_ALL, "")) |
| 266 | done = TRUE; |
| 267 | else |
| 268 | setlocale_failure = TRUE; |
| 269 | } |
| 270 | if (!setlocale_failure) { |
| 271 | #ifdef USE_LOCALE_CTYPE |
| 272 | if (! (curctype = |
| 273 | setlocale(LC_CTYPE, |
| 274 | (!done && (lang || PerlEnv_getenv("LC_CTYPE"))) |
| 275 | ? "" : Nullch))) |
| 276 | setlocale_failure = TRUE; |
| 277 | else |
| 278 | curctype = savepv(curctype); |
| 279 | #endif /* USE_LOCALE_CTYPE */ |
| 280 | #ifdef USE_LOCALE_COLLATE |
| 281 | if (! (curcoll = |
| 282 | setlocale(LC_COLLATE, |
| 283 | (!done && (lang || PerlEnv_getenv("LC_COLLATE"))) |
| 284 | ? "" : Nullch))) |
| 285 | setlocale_failure = TRUE; |
| 286 | else |
| 287 | curcoll = savepv(curcoll); |
| 288 | #endif /* USE_LOCALE_COLLATE */ |
| 289 | #ifdef USE_LOCALE_NUMERIC |
| 290 | if (! (curnum = |
| 291 | setlocale(LC_NUMERIC, |
| 292 | (!done && (lang || PerlEnv_getenv("LC_NUMERIC"))) |
| 293 | ? "" : Nullch))) |
| 294 | setlocale_failure = TRUE; |
| 295 | else |
| 296 | curnum = savepv(curnum); |
| 297 | #endif /* USE_LOCALE_NUMERIC */ |
| 298 | } |
| 299 | |
| 300 | #endif /* LC_ALL */ |
| 301 | |
| 302 | #endif /* !LOCALE_ENVIRON_REQUIRED */ |
| 303 | |
| 304 | #ifdef LC_ALL |
| 305 | if (! setlocale(LC_ALL, "")) |
| 306 | setlocale_failure = TRUE; |
| 307 | #endif /* LC_ALL */ |
| 308 | |
| 309 | if (!setlocale_failure) { |
| 310 | #ifdef USE_LOCALE_CTYPE |
| 311 | if (! (curctype = setlocale(LC_CTYPE, ""))) |
| 312 | setlocale_failure = TRUE; |
| 313 | else |
| 314 | curctype = savepv(curctype); |
| 315 | #endif /* USE_LOCALE_CTYPE */ |
| 316 | #ifdef USE_LOCALE_COLLATE |
| 317 | if (! (curcoll = setlocale(LC_COLLATE, ""))) |
| 318 | setlocale_failure = TRUE; |
| 319 | else |
| 320 | curcoll = savepv(curcoll); |
| 321 | #endif /* USE_LOCALE_COLLATE */ |
| 322 | #ifdef USE_LOCALE_NUMERIC |
| 323 | if (! (curnum = setlocale(LC_NUMERIC, ""))) |
| 324 | setlocale_failure = TRUE; |
| 325 | else |
| 326 | curnum = savepv(curnum); |
| 327 | #endif /* USE_LOCALE_NUMERIC */ |
| 328 | } |
| 329 | |
| 330 | if (setlocale_failure) { |
| 331 | char *p; |
| 332 | bool locwarn = (printwarn > 1 || |
| 333 | (printwarn && |
| 334 | (!(p = PerlEnv_getenv("PERL_BADLANG")) || atoi(p)))); |
| 335 | |
| 336 | if (locwarn) { |
| 337 | #ifdef LC_ALL |
| 338 | |
| 339 | PerlIO_printf(Perl_error_log, |
| 340 | "perl: warning: Setting locale failed.\n"); |
| 341 | |
| 342 | #else /* !LC_ALL */ |
| 343 | |
| 344 | PerlIO_printf(Perl_error_log, |
| 345 | "perl: warning: Setting locale failed for the categories:\n\t"); |
| 346 | #ifdef USE_LOCALE_CTYPE |
| 347 | if (! curctype) |
| 348 | PerlIO_printf(Perl_error_log, "LC_CTYPE "); |
| 349 | #endif /* USE_LOCALE_CTYPE */ |
| 350 | #ifdef USE_LOCALE_COLLATE |
| 351 | if (! curcoll) |
| 352 | PerlIO_printf(Perl_error_log, "LC_COLLATE "); |
| 353 | #endif /* USE_LOCALE_COLLATE */ |
| 354 | #ifdef USE_LOCALE_NUMERIC |
| 355 | if (! curnum) |
| 356 | PerlIO_printf(Perl_error_log, "LC_NUMERIC "); |
| 357 | #endif /* USE_LOCALE_NUMERIC */ |
| 358 | PerlIO_printf(Perl_error_log, "\n"); |
| 359 | |
| 360 | #endif /* LC_ALL */ |
| 361 | |
| 362 | PerlIO_printf(Perl_error_log, |
| 363 | "perl: warning: Please check that your locale settings:\n"); |
| 364 | |
| 365 | #ifdef __GLIBC__ |
| 366 | PerlIO_printf(Perl_error_log, |
| 367 | "\tLANGUAGE = %c%s%c,\n", |
| 368 | language ? '"' : '(', |
| 369 | language ? language : "unset", |
| 370 | language ? '"' : ')'); |
| 371 | #endif |
| 372 | |
| 373 | PerlIO_printf(Perl_error_log, |
| 374 | "\tLC_ALL = %c%s%c,\n", |
| 375 | lc_all ? '"' : '(', |
| 376 | lc_all ? lc_all : "unset", |
| 377 | lc_all ? '"' : ')'); |
| 378 | |
| 379 | #if defined(USE_ENVIRON_ARRAY) |
| 380 | { |
| 381 | char **e; |
| 382 | for (e = environ; *e; e++) { |
| 383 | if (strnEQ(*e, "LC_", 3) |
| 384 | && strnNE(*e, "LC_ALL=", 7) |
| 385 | && (p = strchr(*e, '='))) |
| 386 | PerlIO_printf(Perl_error_log, "\t%.*s = \"%s\",\n", |
| 387 | (int)(p - *e), *e, p + 1); |
| 388 | } |
| 389 | } |
| 390 | #else |
| 391 | PerlIO_printf(Perl_error_log, |
| 392 | "\t(possibly more locale environment variables)\n"); |
| 393 | #endif |
| 394 | |
| 395 | PerlIO_printf(Perl_error_log, |
| 396 | "\tLANG = %c%s%c\n", |
| 397 | lang ? '"' : '(', |
| 398 | lang ? lang : "unset", |
| 399 | lang ? '"' : ')'); |
| 400 | |
| 401 | PerlIO_printf(Perl_error_log, |
| 402 | " are supported and installed on your system.\n"); |
| 403 | } |
| 404 | |
| 405 | #ifdef LC_ALL |
| 406 | |
| 407 | if (setlocale(LC_ALL, "C")) { |
| 408 | if (locwarn) |
| 409 | PerlIO_printf(Perl_error_log, |
| 410 | "perl: warning: Falling back to the standard locale (\"C\").\n"); |
| 411 | ok = 0; |
| 412 | } |
| 413 | else { |
| 414 | if (locwarn) |
| 415 | PerlIO_printf(Perl_error_log, |
| 416 | "perl: warning: Failed to fall back to the standard locale (\"C\").\n"); |
| 417 | ok = -1; |
| 418 | } |
| 419 | |
| 420 | #else /* ! LC_ALL */ |
| 421 | |
| 422 | if (0 |
| 423 | #ifdef USE_LOCALE_CTYPE |
| 424 | || !(curctype || setlocale(LC_CTYPE, "C")) |
| 425 | #endif /* USE_LOCALE_CTYPE */ |
| 426 | #ifdef USE_LOCALE_COLLATE |
| 427 | || !(curcoll || setlocale(LC_COLLATE, "C")) |
| 428 | #endif /* USE_LOCALE_COLLATE */ |
| 429 | #ifdef USE_LOCALE_NUMERIC |
| 430 | || !(curnum || setlocale(LC_NUMERIC, "C")) |
| 431 | #endif /* USE_LOCALE_NUMERIC */ |
| 432 | ) |
| 433 | { |
| 434 | if (locwarn) |
| 435 | PerlIO_printf(Perl_error_log, |
| 436 | "perl: warning: Cannot fall back to the standard locale (\"C\").\n"); |
| 437 | ok = -1; |
| 438 | } |
| 439 | |
| 440 | #endif /* ! LC_ALL */ |
| 441 | |
| 442 | #ifdef USE_LOCALE_CTYPE |
| 443 | curctype = savepv(setlocale(LC_CTYPE, Nullch)); |
| 444 | #endif /* USE_LOCALE_CTYPE */ |
| 445 | #ifdef USE_LOCALE_COLLATE |
| 446 | curcoll = savepv(setlocale(LC_COLLATE, Nullch)); |
| 447 | #endif /* USE_LOCALE_COLLATE */ |
| 448 | #ifdef USE_LOCALE_NUMERIC |
| 449 | curnum = savepv(setlocale(LC_NUMERIC, Nullch)); |
| 450 | #endif /* USE_LOCALE_NUMERIC */ |
| 451 | } |
| 452 | else { |
| 453 | |
| 454 | #ifdef USE_LOCALE_CTYPE |
| 455 | new_ctype(curctype); |
| 456 | #endif /* USE_LOCALE_CTYPE */ |
| 457 | |
| 458 | #ifdef USE_LOCALE_COLLATE |
| 459 | new_collate(curcoll); |
| 460 | #endif /* USE_LOCALE_COLLATE */ |
| 461 | |
| 462 | #ifdef USE_LOCALE_NUMERIC |
| 463 | new_numeric(curnum); |
| 464 | #endif /* USE_LOCALE_NUMERIC */ |
| 465 | } |
| 466 | |
| 467 | #endif /* USE_LOCALE */ |
| 468 | |
| 469 | #ifdef USE_LOCALE_CTYPE |
| 470 | if (curctype != NULL) |
| 471 | Safefree(curctype); |
| 472 | #endif /* USE_LOCALE_CTYPE */ |
| 473 | #ifdef USE_LOCALE_COLLATE |
| 474 | if (curcoll != NULL) |
| 475 | Safefree(curcoll); |
| 476 | #endif /* USE_LOCALE_COLLATE */ |
| 477 | #ifdef USE_LOCALE_NUMERIC |
| 478 | if (curnum != NULL) |
| 479 | Safefree(curnum); |
| 480 | #endif /* USE_LOCALE_NUMERIC */ |
| 481 | return ok; |
| 482 | } |
| 483 | |
| 484 | /* Backwards compatibility. */ |
| 485 | int |
| 486 | Perl_init_i18nl14n(pTHX_ int printwarn) |
| 487 | { |
| 488 | return init_i18nl10n(printwarn); |
| 489 | } |
| 490 | |
| 491 | #ifdef USE_LOCALE_COLLATE |
| 492 | |
| 493 | /* |
| 494 | * mem_collxfrm() is a bit like strxfrm() but with two important |
| 495 | * differences. First, it handles embedded NULs. Second, it allocates |
| 496 | * a bit more memory than needed for the transformed data itself. |
| 497 | * The real transformed data begins at offset sizeof(collationix). |
| 498 | * Please see sv_collxfrm() to see how this is used. |
| 499 | */ |
| 500 | char * |
| 501 | Perl_mem_collxfrm(pTHX_ const char *s, STRLEN len, STRLEN *xlen) |
| 502 | { |
| 503 | char *xbuf; |
| 504 | STRLEN xAlloc, xin, xout; /* xalloc is a reserved word in VC */ |
| 505 | |
| 506 | /* the first sizeof(collationix) bytes are used by sv_collxfrm(). */ |
| 507 | /* the +1 is for the terminating NUL. */ |
| 508 | |
| 509 | xAlloc = sizeof(PL_collation_ix) + PL_collxfrm_base + (PL_collxfrm_mult * len) + 1; |
| 510 | New(171, xbuf, xAlloc, char); |
| 511 | if (! xbuf) |
| 512 | goto bad; |
| 513 | |
| 514 | *(U32*)xbuf = PL_collation_ix; |
| 515 | xout = sizeof(PL_collation_ix); |
| 516 | for (xin = 0; xin < len; ) { |
| 517 | SSize_t xused; |
| 518 | |
| 519 | for (;;) { |
| 520 | xused = strxfrm(xbuf + xout, s + xin, xAlloc - xout); |
| 521 | if (xused == -1) |
| 522 | goto bad; |
| 523 | if (xused < xAlloc - xout) |
| 524 | break; |
| 525 | xAlloc = (2 * xAlloc) + 1; |
| 526 | Renew(xbuf, xAlloc, char); |
| 527 | if (! xbuf) |
| 528 | goto bad; |
| 529 | } |
| 530 | |
| 531 | xin += strlen(s + xin) + 1; |
| 532 | xout += xused; |
| 533 | |
| 534 | /* Embedded NULs are understood but silently skipped |
| 535 | * because they make no sense in locale collation. */ |
| 536 | } |
| 537 | |
| 538 | xbuf[xout] = '\0'; |
| 539 | *xlen = xout - sizeof(PL_collation_ix); |
| 540 | return xbuf; |
| 541 | |
| 542 | bad: |
| 543 | Safefree(xbuf); |
| 544 | *xlen = 0; |
| 545 | return NULL; |
| 546 | } |
| 547 | |
| 548 | #endif /* USE_LOCALE_COLLATE */ |
| 549 | |
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