/* Copyright 2009-2020 * Kaz Kylheku * Vancouver, Canada * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #define UTF8_DECL_OPENDIR #include #include #include #include #include #include #include "config.h" #include "lib.h" #include "signal.h" #include "unwind.h" #include "utf8.h" #if WCHAR_MAX > 65535 #define FULL_UNICODE #endif #ifndef FULL_UNICODE static void conversion_error(void) { uw_throw(range_error_s, lit("encountered utf-8 character that needs full unicode support")); } #endif size_t utf8_from_buf(wchar_t *wdst, const unsigned char *src, size_t nbytes) { size_t nchar = 1; enum utf8_state state = utf8_init; const unsigned char *backtrack = 0; wchar_t wch = 0, wch_min = 0; while (nbytes-- > 0) { int ch = *src++; switch (state) { case utf8_init: switch (ch >> 4) { case 0x0: case 0x1: case 0x2: case 0x3: case 0x4: case 0x5: case 0x6: case 0x7: if (wdst) { if (ch) *wdst++ = ch; else *wdst++ = 0xDC00; } nchar++; break; case 0xC: case 0xD: state = utf8_more1; wch = (ch & 0x1F); wch_min = 0x80; break; case 0xE: state = utf8_more2; wch = (ch & 0xF); wch_min = 0x800; break; case 0xF: #ifdef FULL_UNICODE if (ch < 0xF5) { state = utf8_more3; wch = (ch & 0x7); wch_min = 0x10000; break; } #else conversion_error(); #endif /* fallthrough */ default: if (wdst) *wdst++ = 0xDC00 | ch; nchar++; break; } backtrack = src; break; case utf8_more1: case utf8_more2: case utf8_more3: if (ch >= 0x80 && ch < 0xC0) { wch <<= 6; wch |= (ch & 0x3F); state = convert(enum utf8_state, state - 1); if (state == utf8_init) { if (wch < wch_min || (wch <= 0xFFFF && (wch & 0xFF00) == 0xDC00) || (wch > 0x10FFFF)) { src = backtrack; if (wdst) *wdst++ = 0xDC00 | *src; } else { if (wdst) *wdst++ = wch; } nchar++; } } else { src = backtrack; if (wdst) *wdst++ = 0xDC00 | *src; nchar++; state = utf8_init; } break; } } if (wdst) *wdst++ = 0; return nchar; } size_t utf8_to_buf(unsigned char *dst, const wchar_t *wsrc, int null_term) { size_t nbyte = 0; wchar_t wch; while ((wch = *wsrc++)) { if (wch < 0x80) { nbyte += 1; if (dst) *dst++ = wch; } else if (wch < 0x800) { nbyte += 2; if (dst) { *dst++ = 0xC0 | (wch >> 6); *dst++ = 0x80 | (wch & 0x3F); } } else if (wch < 0x10000) { if ((wch & 0xFF00) == 0xDC00) { nbyte += 1; if (dst) *dst++ = (wch & 0xFF); } else { nbyte += 3; if (dst) { *dst++ = 0xE0 | (wch >> 12); *dst++ = 0x80 | ((wch >> 6) & 0x3F); *dst++ = 0x80 | (wch & 0x3F); } } } else if (wch < 0x110000) { nbyte += 4; if (dst) { *dst++ = 0xF0 | (wch >> 18); *dst++ = 0x80 | ((wch >> 12) & 0x3F); *dst++ = 0x80 | ((wch >> 6) & 0x3F); *dst++ = 0x80 | (wch & 0x3F); } } } if (null_term) { if (dst) *dst++ = 0; nbyte++; } return nbyte; } size_t utf8_to(char *dst, const wchar_t *wsrc) { return utf8_to_buf(coerce(unsigned char *, dst), wsrc, 1); } wchar_t *utf8_dup_from(const char *str) { size_t len = strlen(str); size_t nchar = utf8_from_buf(0, coerce(const unsigned char *, str), len); wchar_t *wstr = chk_wmalloc(nchar); utf8_from_buf(wstr, coerce(const unsigned char *, str), len); return wstr; } wchar_t *utf8_dup_from_buf(const char *str, size_t size) { size_t nchar = utf8_from_buf(0, coerce(const unsigned char *, str), size); wchar_t *wstr = chk_wmalloc(nchar); utf8_from_buf(wstr, coerce(const unsigned char *, str), size); return wstr; } unsigned char *utf8_dup_to_buf(const wchar_t *wstr, size_t *pnbytes, int null_term) { size_t nbyte = utf8_to_buf(0, wstr, null_term); unsigned char *str = chk_malloc(nbyte); utf8_to_buf(str, wstr, null_term); *pnbytes = nbyte; return str; } char *utf8_dup_to(const wchar_t *wstr) { size_t len = utf8_to(0, wstr) - 1; char *str = coerce(char *, chk_malloc(len + 1)); utf8_to(str, wstr); str[len] = 0; if (strlen(str) != len) { free(str); uw_throw(error_s, lit("Cannot convert string with embedded NUL to UTF-8 string")); } return str; } int utf8_encode(wchar_t wch, int (*put)(int ch, mem_t *ctx), mem_t *ctx) { if (wch < 0x80) { return put(wch, ctx); } else if (wch < 0x800) { return put(0xC0 | (wch >> 6), ctx) && put(0x80 | (wch & 0x3F), ctx); } else if (wch < 0x10000) { if ((wch & 0xFF00) == 0xDC00) { return put(wch & 0xFF, ctx); } else { return put(0xE0 | (wch >> 12), ctx) && put(0x80 | ((wch >> 6) & 0x3F), ctx) && put(0x80 | (wch & 0x3F), ctx); } } else if (wch < 0x110000) { return put(0xF0 | (wch >> 18), ctx) && put(0x80 | ((wch >> 12) & 0x3F), ctx) && put(0x80 | ((wch >> 6) & 0x3F), ctx) && put(0x80 | (wch & 0x3F), ctx); } uw_throwf(error_s, lit("cannot convert character value #x~x to UTF-8"), num(wch), nao); } void utf8_decoder_init(utf8_decoder_t *ud) { ud->state = utf8_init; ud->flags = 0; ud->wch = 0; ud->head = ud->tail = ud->back = 0; } wint_t utf8_decode(utf8_decoder_t *ud, int (*get)(mem_t *ctx), mem_t *ctx) { for (;;) { int ch; if (ud->tail != ud->head) { ch = ud->buf[ud->tail]; ud->tail = (ud->tail + 1) % 8; } else { ch = get(ctx); ud->buf[ud->head] = ch; ud->head = ud->tail = (ud->head + 1) % 8; } if (ch == EOF) { if (ud->state == utf8_init) { return WEOF; } else { wchar_t wch = 0xDC00 | ud->buf[ud->back]; ud->tail = ud->back = (ud->back + 1) % 8; ud->state = utf8_init; return wch; } } switch (ud->state) { case utf8_init: switch (ch >> 4) { case 0x0: case 0x1: case 0x2: case 0x3: case 0x4: case 0x5: case 0x6: case 0x7: ud->back = ud->tail; if (ch == 0 && (ud->flags & UTF8_ADMIT_NUL) == 0) return 0xDC00; return ch; case 0xC: case 0xD: ud->state = utf8_more1; ud->wch = (ch & 0x1F); ud->wch_min = 0x80; break; case 0xE: ud->state = utf8_more2; ud->wch = (ch & 0xF); ud->wch_min = 0x800; break; case 0xF: #ifdef FULL_UNICODE if (ch < 0xF5) { ud->state = utf8_more3; ud->wch = (ch & 0x7); ud->wch_min = 0x10000; break; } #else conversion_error(); #endif /* fallthrough */ default: ud->back = ud->tail; return 0xDC00 | ch; } break; case utf8_more1: case utf8_more2: case utf8_more3: if (ch >= 0x80 && ch < 0xC0) { ud->wch <<= 6; ud->wch |= (ch & 0x3F); ud->state = convert(enum utf8_state, ud->state - 1); if (ud->state == utf8_init) { if (ud->wch < ud->wch_min || (ud->wch <= 0xFFFF && (ud->wch & 0xFF00) == 0xDC00) || (ud->wch > 0x10FFFF)) { wchar_t wch = 0xDC00 | ud->buf[ud->back]; ud->tail = ud->back = (ud->back + 1) % 8; return wch; } else { ud->back = ud->tail; return ud->wch; } } } else { wchar_t wch = 0xDC00 | ud->buf[ud->back]; ud->tail = ud->back = (ud->back + 1) % 8; ud->state = utf8_init; return wch; } break; } } } FILE *w_fopen(const wchar_t *wname, const wchar_t *wmode) { char *name = utf8_dup_to(wname); char *mode = utf8_dup_to(wmode); FILE *f = fopen(name, mode); free(name); free(mode); return f; } FILE *w_popen(const wchar_t *wcmd, const wchar_t *wmode) { char *cmd = utf8_dup_to(wcmd); char *mode = utf8_dup_to(wmode); FILE *f = popen(cmd, mode); free(cmd); free(mode); return f; } FILE *w_freopen(const wchar_t *wname, const wchar_t *wmode, FILE *fold) { char *name = utf8_dup_to(wname); char *mode = utf8_dup_to(wmode); FILE *f = fold ? freopen(name, mode, fold) : fopen(name, mode); free(name); free(mode); return f; } FILE *w_fdopen(int fd, const wchar_t *wmode) { char *mode = utf8_dup_to(wmode); FILE *f = fdopen(fd, mode); free(mode); return f; } int w_remove(const wchar_t *wpath) { char *path = utf8_dup_to(wpath); int err = remove(path); free(path); return err; } int w_rename(const wchar_t *wfrom, const wchar_t *wto) { char *from = utf8_dup_to(wfrom); char *to = utf8_dup_to(wto); int err = rename(from, to); free(to); free(from); return err; } DIR *w_opendir(const wchar_t *wname) { char *name = utf8_dup_to(wname); DIR *d = opendir(name); free(name); return d; } ref='#n248'>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