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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 | /* * Copyright (c) 2000-2001 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ #include <sys/param.h> #include <sys/utfconv.h> #include <sys/errno.h> #include <architecture/byte_order.h> /* * UTF-8 (Unicode Transformation Format) * * UTF-8 is the Unicode Transformation Format that serializes a Unicode * character as a sequence of one to four bytes. Only the shortest form * required to represent the significant Unicode bits is legal. * * UTF-8 Multibyte Codes * * Bytes Bits Unicode Min Unicode Max UTF-8 Byte Sequence (binary) * ----------------------------------------------------------------------------- * 1 7 0x0000 0x007F 0xxxxxxx * 2 11 0x0080 0x07FF 110xxxxx 10xxxxxx * 3 16 0x0800 0xFFFF 1110xxxx 10xxxxxx 10xxxxxx * 4 21 0x10000 0x10FFFF 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx * ----------------------------------------------------------------------------- */ #define UNICODE_TO_UTF8_LEN(c) \ ((c) < 0x0080 ? 1 : ((c) < 0x0800 ? 2 : (((c) & 0xf800) == 0xd800 ? 2 : 3))) #define UCS_ALT_NULL 0x2400 /* Surrogate Pair Constants */ #define SP_HALF_SHIFT 10 #define SP_HALF_BASE 0x0010000UL #define SP_HALF_MASK 0x3FFUL #define SP_HIGH_FIRST 0xD800UL #define SP_HIGH_LAST 0xDBFFUL #define SP_LOW_FIRST 0xDC00UL #define SP_LOW_LAST 0xDFFFUL static u_int16_t ucs_decompose(u_int16_t, u_int16_t *); static u_int16_t ucs_combine(u_int16_t base, u_int16_t comb); char utf_extrabytes[32] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, -1, -1, -1, -1, -1, -1, -1, 1, 1, 1, 1, 2, 2, 3, -1 }; /* * utf8_encodelen - Calculates the UTF-8 encoding length for a Unicode filename * * NOTES: * If '/' chars are allowed on disk then an alternate * (replacement) char must be provided in altslash. * * input flags: * UTF_REVERSE_ENDIAN: Unicode byteorder is opposite current runtime */ size_t utf8_encodelen(const u_int16_t * ucsp, size_t ucslen, u_int16_t altslash, int flags) { u_int16_t ucs_ch; int charcnt; int swapbytes = (flags & UTF_REVERSE_ENDIAN); size_t len; charcnt = ucslen / 2; len = 0; while (charcnt-- > 0) { ucs_ch = *ucsp++; if (swapbytes) ucs_ch = NXSwapShort(ucs_ch); if (ucs_ch == '/') ucs_ch = altslash ? altslash : '_'; else if (ucs_ch == '\0') ucs_ch = UCS_ALT_NULL; len += UNICODE_TO_UTF8_LEN(ucs_ch); } return (len); } /* * utf8_encodestr - Encodes a Unicode string to UTF-8 * * NOTES: * The resulting UTF-8 string is NULL terminated. * * If '/' chars are allowed on disk then an alternate * (replacement) char must be provided in altslash. * * input flags: * UTF_REVERSE_ENDIAN: Unicode byteorder is opposite current runtime * UTF_NO_NULL_TERM: don't add NULL termination to UTF-8 output * * result: * ENAMETOOLONG: Name didn't fit; only buflen bytes were encoded * EINVAL: Illegal char found; char was replaced by an '_'. */ int utf8_encodestr(const u_int16_t * ucsp, size_t ucslen, u_int8_t * utf8p, size_t * utf8len, size_t buflen, u_int16_t altslash, int flags) { u_int8_t * bufstart; u_int8_t * bufend; u_int16_t ucs_ch; u_int16_t extra[2] = {0}; int charcnt; int swapbytes = (flags & UTF_REVERSE_ENDIAN); int nullterm = ((flags & UTF_NO_NULL_TERM) == 0); int decompose = (flags & UTF_DECOMPOSED); int result = 0; bufstart = utf8p; bufend = bufstart + buflen; if (nullterm) --bufend; charcnt = ucslen / 2; while (charcnt-- > 0) { if (!decompose) ucs_ch = swapbytes ? NXSwapShort(*ucsp++) : *ucsp++; else if (extra[0]) { ucs_ch = extra[0]; extra[0] = 0; } else if (extra[1]) { ucs_ch = extra[1]; extra[1] = 0; } else { ucs_ch = swapbytes ? NXSwapShort(*ucsp++) : *ucsp++; ucs_ch = ucs_decompose(ucs_ch, &extra[0]); if (extra[0]) charcnt++; if (extra[1]) charcnt++; } /* Slash and NULL are not permitted */ if (ucs_ch == '/') { if (altslash) ucs_ch = altslash; else { ucs_ch = '_'; result = EINVAL; } } else if (ucs_ch == '\0') { ucs_ch = UCS_ALT_NULL; } if (ucs_ch < 0x0080) { if (utf8p >= bufend) { result = ENAMETOOLONG; break; } *utf8p++ = ucs_ch; } else if (ucs_ch < 0x800) { if ((utf8p + 1) >= bufend) { result = ENAMETOOLONG; break; } *utf8p++ = 0xc0 | (ucs_ch >> 6); *utf8p++ = 0x80 | (0x3f & ucs_ch); } else { /* Combine valid surrogate pairs */ if (ucs_ch >= SP_HIGH_FIRST && ucs_ch <= SP_HIGH_LAST && charcnt > 0) { u_int16_t ch2; u_int32_t pair; ch2 = swapbytes ? NXSwapShort(*ucsp) : *ucsp; if (ch2 >= SP_LOW_FIRST && ch2 <= SP_LOW_LAST) { pair = ((ucs_ch - SP_HIGH_FIRST) << SP_HALF_SHIFT) + (ch2 - SP_LOW_FIRST) + SP_HALF_BASE; if ((utf8p + 3) >= bufend) { result = ENAMETOOLONG; break; } --charcnt; ++ucsp; *utf8p++ = 0xf0 | (pair >> 18); *utf8p++ = 0x80 | (0x3f & (pair >> 12)); *utf8p++ = 0x80 | (0x3f & (pair >> 6)); *utf8p++ = 0x80 | (0x3f & pair); continue; } } if ((utf8p + 2) >= bufend) { result = ENAMETOOLONG; break; } *utf8p++ = 0xe0 | (ucs_ch >> 12); *utf8p++ = 0x80 | (0x3f & (ucs_ch >> 6)); *utf8p++ = 0x80 | (0x3f & ucs_ch); } } *utf8len = utf8p - bufstart; if (nullterm) *utf8p++ = '\0'; return (result); } /* * utf8_decodestr - Decodes a UTF-8 string back to Unicode * * NOTES: * The input UTF-8 string does not need to be null terminated * if utf8len is set. * * If '/' chars are allowed on disk then an alternate * (replacement) char must be provided in altslash. * * input flags: * UTF_REV_ENDIAN: Unicode byteorder is oposite current runtime * UTF_DECOMPOSED: Unicode output string must be fully decompsed * * result: * ENAMETOOLONG: Name didn't fit; only ucslen chars were decoded. * EINVAL: Illegal UTF-8 sequence found. */ int utf8_decodestr(const u_int8_t* utf8p, size_t utf8len, u_int16_t* ucsp, size_t *ucslen, size_t buflen, u_int16_t altslash, int flags) { u_int16_t* bufstart; u_int16_t* bufend; u_int16_t ucs_ch; u_int8_t byte; int result = 0; int decompose, precompose, swapbytes; decompose = (flags & UTF_DECOMPOSED); precompose = (flags & UTF_PRECOMPOSED); swapbytes = (flags & UTF_REVERSE_ENDIAN); bufstart = ucsp; bufend = (u_int16_t *)((u_int8_t *)ucsp + buflen); while (utf8len-- > 0 && (byte = *utf8p++) != '\0') { if (ucsp >= bufend) goto toolong; /* check for ascii */ if (byte < 0x80) { ucs_ch = byte; /* 1st byte */ } else { u_int32_t ch; int extrabytes = utf_extrabytes[byte >> 3]; if (utf8len < extrabytes) goto invalid; utf8len -= extrabytes; switch (extrabytes) { case 1: ch = byte; /* 1st byte */ ch <<= 6; ch += *utf8p++; /* 2nd byte */ ch -= 0x00003080UL; if (ch < 0x0080) goto invalid; ucs_ch = ch; break; case 2: ch = byte; /* 1st byte */ ch <<= 6; ch += *utf8p++; /* 2nd byte */ ch <<= 6; ch += *utf8p++; /* 3rd byte */ ch -= 0x000E2080UL; if (ch < 0x0800) goto invalid; ucs_ch = ch; break; case 3: ch = byte; /* 1st byte */ ch <<= 6; ch += *utf8p++; /* 2nd byte */ ch <<= 6; ch += *utf8p++; /* 3rd byte */ ch <<= 6; ch += *utf8p++; /* 4th byte */ ch -= 0x03C82080UL + SP_HALF_BASE; ucs_ch = (ch >> SP_HALF_SHIFT) + SP_HIGH_FIRST; *ucsp++ = swapbytes ? NXSwapShort(ucs_ch) : ucs_ch; if (ucsp >= bufend) goto toolong; ucs_ch = (ch & SP_HALF_MASK) + SP_LOW_FIRST; *ucsp++ = swapbytes ? NXSwapShort(ucs_ch) : ucs_ch; continue; default: goto invalid; } if (decompose) { u_int16_t comb_ch[2]; ucs_ch = ucs_decompose(ucs_ch, &comb_ch[0]); if (comb_ch[0]) { *ucsp++ = swapbytes ? NXSwapShort(ucs_ch) : ucs_ch; if (ucsp >= bufend) goto toolong; ucs_ch = comb_ch[0]; if (comb_ch[1]) { *ucsp++ = swapbytes ? NXSwapShort(ucs_ch) : ucs_ch; if (ucsp >= bufend) goto toolong; ucs_ch = comb_ch[1]; } } } else if (precompose && (ucsp != bufstart)) { u_int16_t composite, base; base = swapbytes ? NXSwapShort(*(ucsp - 1)) : *(ucsp - 1); composite = ucs_combine(base, ucs_ch); if (composite) { --ucsp; ucs_ch = composite; } } if (ucs_ch == UCS_ALT_NULL) ucs_ch = '\0'; } if (ucs_ch == altslash) ucs_ch = '/'; *ucsp++ = swapbytes ? NXSwapShort(ucs_ch) : ucs_ch; } exit: *ucslen = (u_int8_t*)ucsp - (u_int8_t*)bufstart; return (result); invalid: result = EINVAL; goto exit; toolong: result = ENAMETOOLONG; goto exit; } /* * Lookup tables for Unicode chars 0x00C0 thru 0x00FF * primary_char yields first decomposed char. If this * char is an alpha char then get the combining char * from the combining_char table and add 0x0300 to it. */ static unsigned char primary_char[8*36] = { 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x00, 0x43, 0x45, 0x45, 0x45, 0x45, 0x49, 0x49, 0x49, 0x49, /* CF */ 0x00, 0x4E, 0x4F, 0x4F, 0x4F, 0x4F, 0x4F, 0x00, 0x00, 0x55, 0x55, 0x55, 0x55, 0x59, 0x00, 0x00, /* DF */ 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x00, 0x63, 0x65, 0x65, 0x65, 0x65, 0x69, 0x69, 0x69, 0x69, /* EF */ 0x00, 0x6E, 0x6F, 0x6F, 0x6F, 0x6F, 0x6F, 0x00, 0x00, 0x75, 0x75, 0x75, 0x75, 0x79, 0x00, 0x79, /* FF */ 0x41, 0x61, 0x41, 0x61, 0x41, 0x61, 0x43, 0x63, 0x43, 0x63, 0x43, 0x63, 0x43, 0x63, 0x44, 0x64, /* 10F */ 0x00, 0x00, 0x45, 0x65, 0x45, 0x65, 0x45, 0x65, 0x45, 0x65, 0x45, 0x65, 0x47, 0x67, 0x47, 0x67, /* 11F */ 0x47, 0x67, 0x47, 0x67, 0x48, 0x68, 0x00, 0x00, 0x49, 0x69, 0x49, 0x69, 0x49, 0x69, 0x49, 0x69, 0x49, 0x00, 0x00, 0x00, 0x4A, 0x6A, 0x4B, 0x6B, 0x00, 0x4C, 0x6C, 0x4C, 0x6C, 0x4C, 0x6C, 0x00, /* 13F */ 0x00, 0x00, 0x00, 0x4E, 0x6E, 0x4E, 0x6E, 0x4E, 0x6E, 0x00, 0x00, 0x00, 0x4F, 0x6F, 0x4F, 0x6F, 0x4F, 0x6F, 0x00, 0x00, 0x52, 0x72, 0x52, 0x72, 0x52, 0x72, 0x53, 0x73, 0x53, 0x73, 0x53, 0x73, /* 15F */ 0x53, 0x73, 0x54, 0x74, 0x54, 0x74, 0x00, 0x00, 0x55, 0x75, 0x55, 0x75, 0x55, 0x75, 0x55, 0x75, 0x55, 0x75, 0x55, 0x75, 0x57, 0x77, 0x59, 0x79, 0x59, 0x5A, 0x7A, 0x5A, 0x7A, 0x5A, 0x7A, 0x00, /* 17F */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 19F */ 0x4F, 0x6F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0x75, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1BF */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x41, 0x61, 0x49, 0x69, 0x4F, 0x6F, 0x55, 0x75, 0xDC, 0xFC, 0xDC, 0xFC, 0xDC, 0xFC, 0xDC, 0xFC, 0x00, 0xC4, 0xE4 /* 1DF */ }; static unsigned char combining_char[8*36] = { 0x00, 0x01, 0x02, 0x03, 0x08, 0x0A, 0xFF, 0x27, 0x00, 0x01, 0x02, 0x08, 0x00, 0x01, 0x02, 0x08, /* CF */ 0xFF, 0x03, 0x00, 0x01, 0x02, 0x03, 0x08, 0xFF, 0xFF, 0x00, 0x01, 0x02, 0x08, 0x01, 0xFF, 0xFF, /* DF */ 0x00, 0x01, 0x02, 0x03, 0x08, 0x0A, 0xFF, 0x27, 0x00, 0x01, 0x02, 0x08, 0x00, 0x01, 0x02, 0x08, /* EF */ 0xFF, 0x03, 0x00, 0x01, 0x02, 0x03, 0x08, 0xFF, 0xFF, 0x00, 0x01, 0x02, 0x08, 0x01, 0xFF, 0x08, /* FF */ 0x04, 0x04, 0x06, 0x06, 0x28, 0x28, 0x01, 0x01, 0x02, 0x02, 0x07, 0x07, 0x0C, 0x0C, 0x0C, 0x0C, 0x00, 0x00, 0x04, 0x04, 0x06, 0x06, 0x07, 0x07, 0x28, 0x28, 0x0C, 0x0C, 0x02, 0x02, 0x06, 0x06, 0x07, 0x07, 0x27, 0x27, 0x02, 0x02, 0x00, 0x00, 0x03, 0x03, 0x04, 0x04, 0x06, 0x06, 0x28, 0x28, 0x07, 0x00, 0x00, 0x00, 0x02, 0x02, 0x27, 0x27, 0x00, 0x01, 0x01, 0x27, 0x27, 0x0C, 0x0C, 0x00, /* 13F */ 0x00, 0x00, 0x00, 0x01, 0x01, 0x27, 0x27, 0x0C, 0x0C, 0x00, 0x00, 0x00, 0x04, 0x04, 0x06, 0x06, 0x0B, 0x0B, 0x00, 0x00, 0x01, 0x01, 0x27, 0x27, 0x0C, 0x0C, 0x01, 0x01, 0x02, 0x02, 0x27, 0x27, 0x0C, 0x0C, 0x27, 0x27, 0x0C, 0x0C, 0x00, 0x00, 0x03, 0x03, 0x04, 0x04, 0x06, 0x06, 0x0A, 0x0A, /* 16F */ 0x0B, 0x0B, 0x28, 0x28, 0x02, 0x02, 0x02, 0x02, 0x08, 0x01, 0x01, 0x07, 0x07, 0x0C, 0x0C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 17F */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 19F */ 0x1B, 0x1B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1B, 0x1B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0C, 0x0C, 0x0C, /* 1CF */ 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x04, 0x04, 0x01, 0x01, 0x0C, 0x0C, 0x00, 0x00, 0x00, 0x04, 0x04 /* 1DF */ }; /* CYRILLIC codepoints 0x0400 ~ 0x04FF */ static const unsigned long __CyrillicDecompBitmap[] = { 0x510A0040, 0x00000040, 0x0000510A, 0x00000000, /* 0x0400 */ 0x00000000, 0x00000000, 0x00000000, 0x00000000, /* 0x0480 */ }; /* CJK codepoints 0x3000 ~ 0x30FF */ static const unsigned long __CJKDecompBitmap[] = { 0x00000000, 0x00000000, 0x000AAAAA, 0xA540DB6C, /* 0x3000 */ 0x00000802, 0x000AAAAA, 0xA540DB6C, 0x000009E2, /* 0x3080 */ }; #define IS_DECOMPOSABLE(table,unicodeVal) \ (table[(unicodeVal) / 32] & (1 << (31 - ((unicodeVal) % 32)))) /* * ucs_decompose - decompose a composed Unicode char * * Composed Unicode characters are forbidden on * HFS Plus volumes. ucs_decompose will convert a * composed character into its correct decomposed * sequence. * * Currently only Tier-1 and Tier-2 languages * are handled. Other composed characters are * passed unchanged. */ static u_int16_t ucs_decompose(register u_int16_t ch, u_int16_t *cmb) { u_int16_t base; cmb[0] = 0; cmb[1] = 0; if (ch < 0x00C0) { base = ch; } else if (ch <= 0x01DF) { base = (u_int16_t) primary_char[ch - 0x00C0]; if (base == 0) base = ch; else { if ((base < 0x00C0) || (primary_char[base - 0x00C0] == 0)) cmb[0] = (u_int16_t)0x0300 + (u_int16_t)combining_char[ch - 0x00C0]; else { u_int16_t tch = base; base = (u_int16_t)primary_char[tch - 0x00C0]; cmb[0] = (u_int16_t)0x0300 + (u_int16_t)combining_char[tch - 0x00C0]; cmb[1] = (u_int16_t)0x0300 + (u_int16_t)combining_char[ch - 0x00C0]; } } } else if ((ch >= 0x0400) && (ch <= 0x04FF) && IS_DECOMPOSABLE(__CyrillicDecompBitmap, ch - 0x0400)) { /* Handle CYRILLIC LETTERs */ switch(ch) { case 0x0401: base = 0x0415; cmb[0] = 0x0308; break; /* */ case 0x0403: base = 0x0413; cmb[0] = 0x0301; break; /* */ case 0x0407: base = 0x0406; cmb[0] = 0x0308; break; /* */ case 0x040C: base = 0x041A; cmb[0] = 0x0301; break; /* */ case 0x040E: base = 0x0423; cmb[0] = 0x0306; break; /* */ case 0x0419: base = 0x0418; cmb[0] = 0x0306; break; /* */ case 0x0439: base = 0x0438; cmb[0] = 0x0306; break; /* */ case 0x0451: base = 0x0435; cmb[0] = 0x0308; break; /* */ case 0x0453: base = 0x0433; cmb[0] = 0x0301; break; /* */ case 0x0457: base = 0x0456; cmb[0] = 0x0308; break; /* */ case 0x045C: base = 0x043A; cmb[0] = 0x0301; break; /* */ case 0x045E: base = 0x0443; cmb[0] = 0x0306; break; /* */ default: /* Should not be hit from bit map table */ base = ch; } } else if (ch == 0x1E3F) { base = 0x006D; cmb[0] = 0x0301; /* LATIN SMALL LETTER M WITH ACUTE */ } else if ((ch > 0x3000) && (ch < 0x3100) && IS_DECOMPOSABLE(__CJKDecompBitmap, ch - 0x3000)) { /* Handle HIRAGANA LETTERs */ switch(ch) { case 0x3071: base = 0x306F; cmb[0] = 0x309A; break; /* PA */ case 0x3074: base = 0x3072; cmb[0] = 0x309A; break; /* PI */ case 0x3077: base = 0x3075; cmb[0] = 0x309A; break; /* PU */ case 0x307A: base = 0x3078; cmb[0] = 0x309A; break; /* PE */ case 0x307D: base = 0x307B; cmb[0] = 0x309A; break; /* PO */ case 0x3094: base = 0x3046; cmb[0] = 0x3099; break; /* VU */ case 0x30D1: base = 0x30CF; cmb[0] = 0x309A; break; /* PA */ case 0x30D4: base = 0x30D2; cmb[0] = 0x309A; break; /* PI */ case 0x30D7: base = 0x30D5; cmb[0] = 0x309A; break; /* PU */ case 0x30DA: base = 0x30D8; cmb[0] = 0x309A; break; /* PE */ case 0x30DD: base = 0x30DB; cmb[0] = 0x309A; break; /* PO */ case 0x30F4: base = 0x30A6; cmb[0] = 0x3099; break; /* VU */ case 0x30F7: base = 0x30EF; cmb[0] = 0x3099; break; /* VA */ case 0x30F8: base = 0x30F0; cmb[0] = 0x3099; break; /* VI */ case 0x30F9: base = 0x30F1; cmb[0] = 0x3099; break; /* VE */ case 0x30FA: base = 0x30F2; cmb[0] = 0x3099; break; /* VO */ default: /* the rest (41 of them) have a simple conversion */ base = ch - 1; cmb[0] = 0x3099; } } else if ((ch >= 0xAC00) && (ch < 0xD7A4)) { /* Hangul */ ch -= 0xAC00; base = 0x1100 + (ch / (21*28)); cmb[0] = 0x1161 + (ch % (21*28)) / 28; if (ch % 28) cmb[1] = 0x11A7 + (ch % 28); } else { base = ch; } return (base); } static const short diacrit_tbl[8*6] = { /* 300 - 307 */ 0, 58, 116, 174, 232, -1, 290, 348, /* 308 - 30F */ 406, -1, 464, 522, 580, -1, -1, -1, /* 310 - 317 */ -1, -1, -1, -1, -1, -1, -1, -1, /* 318 - 31F */ -1, -1, -1, 638, -1, -1, -1, -1, /* 320 - 327 */ -1, -1, -1, -1, -1, -1, -1, 696, /* 328 - 32F */ 754, -1, -1, -1, -1, -1, -1, -1 }; static const u_int16_t composite_tbl[58*14] = { /* * A B C D E F G H I J K L M * N O P Q R S T U V W X Y Z * [ \ ] ^ _ ` * a b c d e f g h i j k l m * n o p q r s t u v w x y z */ /* * 0x300 - grave accent */ 0x0C0, 0, 0, 0,0x0C8, 0, 0, 0,0x0CC, 0, 0, 0, 0, 0,0x0D2, 0, 0, 0, 0, 0,0x0D9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x0E0, 0, 0, 0,0x0E8, 0, 0, 0,0x0EC, 0, 0, 0, 0, 0,0x0F2, 0, 0, 0, 0, 0,0x0F9, 0, 0, 0, 0, 0, /* * 0x301 - acute accent */ 0x0C1, 0,0x106, 0,0x0C9, 0, 0, 0,0x0CD, 0, 0,0x139, 0, 0x143,0x0D3, 0, 0,0x154,0x15A, 0,0x0DA, 0, 0, 0,0x0DD,0x179, 0, 0, 0, 0, 0, 0, 0x0E1, 0,0x107, 0,0x0E9, 0, 0, 0,0x0ED, 0, 0,0x13A,0x1E3F, 0x144,0x0F3, 0, 0,0x155,0x15B, 0,0x0FA, 0, 0, 0,0x0FD,0x17A, /* * 0x302 - circumflex accent */ 0x0C2, 0,0x108, 0,0x0CA, 0,0x11C,0x124,0x0CE,0x134, 0, 0, 0, 0,0x0D4, 0, 0, 0,0x15C, 0,0x0DB, 0,0x174, 0,0x176, 0, 0, 0, 0, 0, 0, 0, 0x0E2, 0,0x109, 0,0x0EA, 0,0x11D,0x125,0x0EE,0x135, 0, 0, 0, 0,0x0F4, 0, 0, 0,0x15D, 0,0x0FB, 0,0x175, 0,0x177, 0, /* * 0x303 - tilde */ 0x0C3, 0, 0, 0, 0, 0, 0, 0,0x128, 0, 0, 0, 0, 0x0D1,0x0D5, 0, 0, 0, 0, 0,0x168, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x0E3, 0, 0, 0, 0, 0, 0, 0,0x129, 0, 0, 0, 0, 0x0F1,0x0F5, 0, 0, 0, 0, 0,0x169, 0, 0, 0, 0, 0, /* * 0x304 - macron */ 0x100, 0, 0, 0,0x112, 0, 0, 0,0x12A, 0, 0, 0, 0, 0,0x14C, 0, 0, 0, 0, 0,0x16A, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x101, 0, 0, 0,0x113, 0, 0, 0,0x12B, 0, 0, 0, 0, 0,0x14D, 0, 0, 0, 0, 0,0x16B, 0, 0, 0, 0, 0, /* * 0x306 - breve */ 0x102, 0, 0, 0,0x114, 0,0x11E, 0,0x12C, 0, 0, 0, 0, 0,0x14E, 0, 0, 0, 0, 0,0x16C, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x103, 0, 0, 0,0x115, 0,0x11F, 0,0x12D, 0, 0, 0, 0, 0,0x14F, 0, 0, 0, 0, 0,0x16D, 0, 0, 0, 0, 0, /* * 0x307 - dot above */ 0, 0,0x10A, 0,0x116, 0,0x120, 0,0x130, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0x17B, 0, 0, 0, 0, 0, 0, 0, 0,0x10B, 0,0x117, 0,0x121, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0x17C, /* * 0x308 - diaeresis */ 0x0C4, 0, 0, 0,0x0CB, 0, 0, 0,0x0CF, 0, 0, 0, 0, 0,0x0D6, 0, 0, 0, 0, 0,0x0DC, 0, 0, 0,0x178, 0, 0, 0, 0, 0, 0, 0, 0x0E4, 0, 0, 0,0x0EB, 0, 0, 0,0x0EF, 0, 0, 0, 0, 0,0x0F6, 0, 0, 0, 0, 0,0x0FC, 0, 0, 0,0x0FF, 0, /* * 0x30A - ring above */ 0x0C5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0x16E, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x0E5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0x16F, 0, 0, 0, 0, 0, /* * 0x30B - double aute accent */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0x150, 0, 0, 0, 0, 0,0x170, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0x151, 0, 0, 0, 0, 0,0x171, 0, 0, 0, 0, 0, /* * 0x30C - caron */ 0x1CD, 0,0x10C,0x10E,0x11A, 0, 0, 0,0x1CF, 0, 0,0x13D, 0, 0x147,0x1D1, 0, 0,0x158,0x160,0x164,0x1D3, 0, 0, 0, 0,0x17D, 0, 0, 0, 0, 0, 0, 0x1CE, 0,0x10D,0x10F,0x11B, 0, 0, 0,0x1D0, 0, 0,0x13E, 0, 0x148,0x1D2, 0, 0,0x159,0x161,0x165,0x1D4, 0, 0, 0, 0,0x17E, /* * 0x31B - horn */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0x1A0, 0, 0, 0, 0, 0,0x1AF, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0x1A1, 0, 0, 0, 0, 0,0x1B0, 0, 0, 0, 0, 0, /* * 0x327 - cedilla */ 0, 0,0x0C7, 0, 0, 0,0x122, 0, 0, 0,0x136,0x13B, 0, 0x145, 0, 0, 0,0x156,0x15E,0x162, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0x0E7, 0, 0, 0,0x123, 0, 0, 0,0x137,0x13C, 0, 0x146, 0, 0, 0,0x157,0x15F,0x163, 0, 0, 0, 0, 0, 0, /* * 0x328 - ogonek */ 0x104, 0, 0, 0,0x118, 0, 0, 0,0x12E, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0x172, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x105, 0, 0, 0,0x119, 0, 0, 0,0x12F, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0x173, 0, 0, 0, 0, 0, }; /* CJK codepoints 0x3000 ~ 0x30FF */ static const unsigned long __CJKCombBitmap[] = { 0x00000000, 0x00000000, 0x02155555, 0x4A812490, /* 0x3000 */ 0x00000004, 0x02155555, 0x4A812490, 0x0001E004, /* 0x3080 */ }; #define CAN_COMBINE(table,unicodeVal) \ (table[(unicodeVal) / 32] & (1 << (31 - ((unicodeVal) % 32)))) /* * ucs_combine - generate a precomposed Unicode char * * Precomposed Unicode characters are required for some volume * formats and network protocols. ucs_combine will combine a * decomposed character sequence into a single precomposed * (composite) character. * * Currently only decomcomposed sequences from Apple's Tier 1 * and Tier 2 languages are handled. * * INPUT: * base - base character * comb - combining character * OUTPUT: * result - precomposed char or zero if not combinable */ static u_int16_t ucs_combine(u_int16_t base, u_int16_t comb) { /* Get out early if we can */ if (comb < 0x0300) return (0); /* Try ordinary diacritics (0x300 - 0x32F) */ if (comb <= 0x032F) { int index; if (base >= 'A' && base <= 'z') { index = diacrit_tbl[comb - 0x0300]; if (index < 0 ) return (0); return (composite_tbl[index + (base - 'A')]); } /* Handle Cyrillic and some 3 char latin sequences */ switch (comb) { case 0x0300: switch (base) { case 0x00DC: return (0x01DB); case 0x00FC: return (0x01DC); } break; case 0x0301: switch (base) { case 0x00DC: return (0x01D7); case 0x00FC: return (0x01D8); case 0x0413: return (0x0403); case 0x041A: return (0x040C); case 0x0433: return (0x0453); case 0x043A: return (0x045C); } break; case 0x0304: switch (base) { case 0x00DC: return (0x01D5); case 0x00FC: return (0x01D6); case 0x00C4: return (0x01DE); case 0x00E4: return (0x01DF); } break; case 0x0306: switch (base) { case 0x0418: return (0x0419); case 0x0423: return (0x040E); case 0x0438: return (0x0439); case 0x0443: return (0x045E); } break; case 0x0308: switch (base) { case 0x0406: return (0x0407); case 0x0415: return (0x0401); case 0x0435: return (0x0451); case 0x0456: return (0x0457); } break; case 0x030C: switch (base) { case 0x00DC: return (0x01D9); case 0x00FC: return (0x01DA); } break; } return (0); } /* Now try HANGUL */ if (comb < 0x1161) return (0); /* 2 char Hangul sequences */ if ((comb <= 0x1175) && (base >= 0x1100 && base <= 0x1112)) return (0xAC00 + ((base - 0x1100)*(21*28)) + ((comb - 0x1161)*28)); /* 3 char Hangul sequences */ if ((comb >= 0x11A8 && comb <= 0x11C2) && (base >= 0xAC00 && base <= 0xD788)) { if ((base - 0xAC00) % 28) return (0); else return (base + (comb - 0x11A7)); } /* Now try HIRAGANA and KATAKANA */ if ((comb == 0x3099 || comb == 0x309A) && (base > 0x3000 && base < 0x3100) && CAN_COMBINE(__CJKCombBitmap, base - 0x3000)) { if (comb == 0x309A) { switch(base) { case 0x306F: return (0x3071); /* PA */ case 0x3072: return (0x3074); /* PI */ case 0x3075: return (0x3077); /* PU */ case 0x3078: return (0x307A); /* PE */ case 0x307B: return (0x307D); /* PO */ case 0x30CF: return (0x30D1); /* PA */ case 0x30D2: return (0x30D4); /* PI */ case 0x30D5: return (0x30D7); /* PU */ case 0x30D8: return (0x30DA); /* PE */ case 0x30DB: return (0x30DD); /* PO */ default: return (0); } } else /* 0x3099 */ { switch (base) { case 0x3046: return (0x3094); /* VU */ case 0x30A6: return (0x30F4); /* VU */ case 0x30EF: return (0x30F7); /* VA */ case 0x30F0: return (0x30F8); /* VI */ case 0x30F1: return (0x30F9); /* VE */ case 0x30F2: return (0x30FA); /* VO */ default: return (base + 1); /* 41 code points here */ } } } return (0); } |