1 /* 2 * $OpenBSD: patch.c,v 1.43 2004/11/19 20:08:11 otto Exp $ 3 * $DragonFly: src/usr.bin/patch/patch.c,v 1.6 2006/04/18 22:11:35 joerg Exp $ 4 */ 5 6 /* 7 * patch - a program to apply diffs to original files 8 * 9 * Copyright 1986, Larry Wall 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following condition is met: 13 * 1. Redistributions of source code must retain the above copyright notice, 14 * this condition and the following disclaimer. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY 17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 23 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * -C option added in 1998, original code by Marc Espie, based on FreeBSD 29 * behaviour 30 */ 31 32 #include <sys/types.h> 33 #include <sys/stat.h> 34 35 #include <ctype.h> 36 #include <getopt.h> 37 #include <limits.h> 38 #include <stdio.h> 39 #include <string.h> 40 #include <stdlib.h> 41 #include <unistd.h> 42 43 #include "common.h" 44 #include "util.h" 45 #include "pch.h" 46 #include "inp.h" 47 #include "backupfile.h" 48 #include "pathnames.h" 49 50 int filemode = 0644; 51 52 char buf[MAXLINELEN]; /* general purpose buffer */ 53 size_t buf_len = sizeof(buf); 54 55 bool using_plan_a = true; /* try to keep everything in memory */ 56 bool out_of_mem = false; /* ran out of memory in plan a */ 57 58 #define MAXFILEC 2 59 60 char *filearg[MAXFILEC]; 61 bool ok_to_create_file = false; 62 char *outname = NULL; 63 char *origprae = NULL; 64 char *TMPOUTNAME; 65 char *TMPINNAME; 66 char *TMPREJNAME; 67 char *TMPPATNAME; 68 bool toutkeep = false; 69 bool trejkeep = false; 70 bool warn_on_invalid_line; 71 bool last_line_missing_eol; 72 73 #ifdef DEBUGGING 74 int debug = 0; 75 #endif 76 77 bool force = false; 78 bool batch = false; 79 bool verbose = true; 80 bool reverse = false; 81 bool noreverse = false; 82 bool skip_rest_of_patch = false; 83 int strippath = 957; 84 bool canonicalize = false; 85 bool check_only = false; 86 int diff_type = 0; 87 char *revision = NULL; /* prerequisite revision, if any */ 88 LINENUM input_lines = 0; /* how long is input file in lines */ 89 int posix = 0; /* strict POSIX mode? */ 90 91 static void reinitialize_almost_everything(void); 92 static void get_some_switches(void); 93 static LINENUM locate_hunk(LINENUM); 94 static void abort_context_hunk(void); 95 static void rej_line(int, LINENUM); 96 static void abort_hunk(void); 97 static void apply_hunk(LINENUM); 98 static void init_output(const char *); 99 static void init_reject(const char *); 100 static void copy_till(LINENUM, bool); 101 static void spew_output(void); 102 static void dump_line(LINENUM, bool); 103 static bool patch_match(LINENUM, LINENUM, LINENUM); 104 static bool similar(const char *, const char *, int); 105 static void usage(void); 106 107 /* true if -E was specified on command line. */ 108 static bool remove_empty_files = false; 109 110 /* true if -R was specified on command line. */ 111 static bool reverse_flag_specified = false; 112 113 /* buffer holding the name of the rejected patch file. */ 114 static char rejname[NAME_MAX + 1]; 115 116 /* buffer for stderr */ 117 static char serrbuf[BUFSIZ]; 118 119 /* how many input lines have been irretractibly output */ 120 static LINENUM last_frozen_line = 0; 121 122 static int Argc; /* guess */ 123 static char **Argv; 124 static int Argc_last; /* for restarting plan_b */ 125 static char **Argv_last; 126 127 static FILE *ofp = NULL; /* output file pointer */ 128 static FILE *rejfp = NULL; /* reject file pointer */ 129 130 static int filec = 0; /* how many file arguments? */ 131 static LINENUM last_offset = 0; 132 static LINENUM maxfuzz = 2; 133 134 /* patch using ifdef, ifndef, etc. */ 135 static bool do_defines = false; 136 /* #ifdef xyzzy */ 137 static char if_defined[128]; 138 /* #ifndef xyzzy */ 139 static char not_defined[128]; 140 /* #else */ 141 static const char else_defined[] = "#else\n"; 142 /* #endif xyzzy */ 143 static char end_defined[128]; 144 145 146 /* Apply a set of diffs as appropriate. */ 147 148 int 149 main(int argc, char *argv[]) 150 { 151 int error = 0, hunk, failed, i, fd; 152 LINENUM where = 0, newwhere, fuzz, mymaxfuzz; 153 const char *tmpdir; 154 char *v; 155 156 setbuf(stderr, serrbuf); 157 for (i = 0; i < MAXFILEC; i++) 158 filearg[i] = NULL; 159 160 /* Cons up the names of the temporary files. */ 161 if ((tmpdir = getenv("TMPDIR")) == NULL || *tmpdir == '\0') 162 tmpdir = _PATH_TMP; 163 for (i = strlen(tmpdir) - 1; i > 0 && tmpdir[i] == '/'; i--) 164 ; 165 i++; 166 if (asprintf(&TMPOUTNAME, "%.*s/patchoXXXXXXXXXX", i, tmpdir) == -1) 167 fatal("cannot allocate memory"); 168 if ((fd = mkstemp(TMPOUTNAME)) < 0) 169 pfatal("can't create %s", TMPOUTNAME); 170 close(fd); 171 172 if (asprintf(&TMPINNAME, "%.*s/patchiXXXXXXXXXX", i, tmpdir) == -1) 173 fatal("cannot allocate memory"); 174 if ((fd = mkstemp(TMPINNAME)) < 0) 175 pfatal("can't create %s", TMPINNAME); 176 close(fd); 177 178 if (asprintf(&TMPREJNAME, "%.*s/patchrXXXXXXXXXX", i, tmpdir) == -1) 179 fatal("cannot allocate memory"); 180 if ((fd = mkstemp(TMPREJNAME)) < 0) 181 pfatal("can't create %s", TMPREJNAME); 182 close(fd); 183 184 if (asprintf(&TMPPATNAME, "%.*s/patchpXXXXXXXXXX", i, tmpdir) == -1) 185 fatal("cannot allocate memory"); 186 if ((fd = mkstemp(TMPPATNAME)) < 0) 187 pfatal("can't create %s", TMPPATNAME); 188 close(fd); 189 190 v = getenv("SIMPLE_BACKUP_SUFFIX"); 191 if (v) 192 simple_backup_suffix = v; 193 else 194 simple_backup_suffix = ORIGEXT; 195 196 /* parse switches */ 197 Argc = argc; 198 Argv = argv; 199 get_some_switches(); 200 201 if (backup_type == none) { 202 if ((v = getenv("PATCH_VERSION_CONTROL")) == NULL) 203 v = getenv("VERSION_CONTROL"); 204 if (v != NULL || !posix) 205 backup_type = get_version(v); /* OK to pass NULL. */ 206 } 207 208 /* make sure we clean up /tmp in case of disaster */ 209 set_signals(0); 210 211 for (open_patch_file(filearg[1]); there_is_another_patch(); 212 reinitialize_almost_everything()) { 213 /* for each patch in patch file */ 214 215 warn_on_invalid_line = true; 216 217 if (outname == NULL) 218 outname = savestr(filearg[0]); 219 220 /* for ed script just up and do it and exit */ 221 if (diff_type == ED_DIFF) { 222 do_ed_script(); 223 continue; 224 } 225 /* initialize the patched file */ 226 if (!skip_rest_of_patch) 227 init_output(TMPOUTNAME); 228 229 /* initialize reject file */ 230 init_reject(TMPREJNAME); 231 232 /* find out where all the lines are */ 233 if (!skip_rest_of_patch) 234 scan_input(filearg[0]); 235 236 /* from here on, open no standard i/o files, because malloc */ 237 /* might misfire and we can't catch it easily */ 238 239 /* apply each hunk of patch */ 240 hunk = 0; 241 failed = 0; 242 out_of_mem = false; 243 while (another_hunk()) { 244 hunk++; 245 fuzz = 0; 246 mymaxfuzz = pch_context(); 247 if (maxfuzz < mymaxfuzz) 248 mymaxfuzz = maxfuzz; 249 if (!skip_rest_of_patch) { 250 do { 251 where = locate_hunk(fuzz); 252 if (hunk == 1 && where == 0 && !force) { 253 /* dwim for reversed patch? */ 254 if (!pch_swap()) { 255 if (fuzz == 0) 256 say("Not enough memory to try swapped hunk! Assuming unswapped.\n"); 257 continue; 258 } 259 reverse = !reverse; 260 /* try again */ 261 where = locate_hunk(fuzz); 262 if (where == 0) { 263 /* didn't find it swapped */ 264 if (!pch_swap()) 265 /* put it back to normal */ 266 fatal("lost hunk on alloc error!\n"); 267 reverse = !reverse; 268 } else if (noreverse) { 269 if (!pch_swap()) 270 /* put it back to normal */ 271 fatal("lost hunk on alloc error!\n"); 272 reverse = !reverse; 273 say("Ignoring previously applied (or reversed) patch.\n"); 274 skip_rest_of_patch = true; 275 } else if (batch) { 276 if (verbose) 277 say("%seversed (or previously applied) patch detected! %s -R.", 278 reverse ? "R" : "Unr", 279 reverse ? "Assuming" : "Ignoring"); 280 } else { 281 ask("%seversed (or previously applied) patch detected! %s -R? [y] ", 282 reverse ? "R" : "Unr", 283 reverse ? "Assume" : "Ignore"); 284 if (*buf == 'n') { 285 ask("Apply anyway? [n] "); 286 if (*buf != 'y') 287 skip_rest_of_patch = true; 288 where = 0; 289 reverse = !reverse; 290 if (!pch_swap()) 291 /* put it back to normal */ 292 fatal("lost hunk on alloc error!\n"); 293 } 294 } 295 } 296 } while (!skip_rest_of_patch && where == 0 && 297 ++fuzz <= mymaxfuzz); 298 299 if (skip_rest_of_patch) { /* just got decided */ 300 fclose(ofp); 301 ofp = NULL; 302 } 303 } 304 newwhere = pch_newfirst() + last_offset; 305 if (skip_rest_of_patch) { 306 abort_hunk(); 307 failed++; 308 if (verbose) 309 say("Hunk #%d ignored at %ld.\n", 310 hunk, newwhere); 311 } else if (where == 0) { 312 abort_hunk(); 313 failed++; 314 if (verbose) 315 say("Hunk #%d failed at %ld.\n", 316 hunk, newwhere); 317 } else { 318 apply_hunk(where); 319 if (verbose) { 320 say("Hunk #%d succeeded at %ld", 321 hunk, newwhere); 322 if (fuzz != 0) 323 say(" with fuzz %ld", fuzz); 324 if (last_offset) 325 say(" (offset %ld line%s)", 326 last_offset, 327 last_offset == 1L ? "" : "s"); 328 say(".\n"); 329 } 330 } 331 } 332 333 if (out_of_mem && using_plan_a) { 334 Argc = Argc_last; 335 Argv = Argv_last; 336 say("\n\nRan out of memory using Plan A--trying again...\n\n"); 337 if (ofp) 338 fclose(ofp); 339 ofp = NULL; 340 if (rejfp) 341 fclose(rejfp); 342 rejfp = NULL; 343 continue; 344 } 345 if (hunk == 0) 346 fatal("Internal error: hunk should not be 0\n"); 347 348 /* finish spewing out the new file */ 349 if (!skip_rest_of_patch) 350 spew_output(); 351 352 /* and put the output where desired */ 353 ignore_signals(); 354 if (!skip_rest_of_patch) { 355 struct stat statbuf; 356 char *realout = outname; 357 358 if (!check_only) { 359 if (move_file(TMPOUTNAME, outname) < 0) { 360 toutkeep = true; 361 realout = TMPOUTNAME; 362 chmod(TMPOUTNAME, filemode); 363 } else 364 chmod(outname, filemode); 365 366 if (remove_empty_files && 367 stat(realout, &statbuf) == 0 && 368 statbuf.st_size == 0) { 369 if (verbose) 370 say("Removing %s (empty after patching).\n", 371 realout); 372 unlink(realout); 373 } 374 } 375 } 376 fclose(rejfp); 377 rejfp = NULL; 378 if (failed) { 379 error = 1; 380 if (*rejname == '\0') { 381 if (strlcpy(rejname, outname, 382 sizeof(rejname)) >= sizeof(rejname)) 383 fatal("filename %s is too long\n", outname); 384 if (strlcat(rejname, REJEXT, 385 sizeof(rejname)) >= sizeof(rejname)) 386 fatal("filename %s is too long\n", outname); 387 } 388 if (skip_rest_of_patch) { 389 say("%d out of %d hunks ignored--saving rejects to %s\n", 390 failed, hunk, rejname); 391 } else { 392 say("%d out of %d hunks failed--saving rejects to %s\n", 393 failed, hunk, rejname); 394 } 395 if (!check_only && move_file(TMPREJNAME, rejname) < 0) 396 trejkeep = true; 397 } 398 set_signals(1); 399 } 400 my_exit(error); 401 /* NOTREACHED */ 402 } 403 404 /* Prepare to find the next patch to do in the patch file. */ 405 406 static void 407 reinitialize_almost_everything(void) 408 { 409 re_patch(); 410 re_input(); 411 412 input_lines = 0; 413 last_frozen_line = 0; 414 415 filec = 0; 416 if (!out_of_mem) { 417 free(filearg[0]); 418 filearg[0] = NULL; 419 } 420 421 free(outname); 422 outname = NULL; 423 424 last_offset = 0; 425 diff_type = 0; 426 427 free(revision); 428 revision = NULL; 429 430 reverse = reverse_flag_specified; 431 skip_rest_of_patch = false; 432 433 get_some_switches(); 434 } 435 436 /* Process switches and filenames. */ 437 438 static void 439 get_some_switches(void) 440 { 441 const char *options = "b::B:cCd:D:eEfF:i:lnNo:p:r:RstuvV:x:z:"; 442 static struct option longopts[] = { 443 {"backup", no_argument, 0, 'b'}, 444 {"batch", no_argument, 0, 't'}, 445 {"check", no_argument, 0, 'C'}, 446 {"context", no_argument, 0, 'c'}, 447 {"debug", required_argument, 0, 'x'}, 448 {"directory", required_argument, 0, 'd'}, 449 {"ed", no_argument, 0, 'e'}, 450 {"force", no_argument, 0, 'f'}, 451 {"forward", no_argument, 0, 'N'}, 452 {"fuzz", required_argument, 0, 'F'}, 453 {"ifdef", required_argument, 0, 'D'}, 454 {"input", required_argument, 0, 'i'}, 455 {"ignore-whitespace", no_argument, 0, 'l'}, 456 {"normal", no_argument, 0, 'n'}, 457 {"output", required_argument, 0, 'o'}, 458 {"prefix", required_argument, 0, 'B'}, 459 {"quiet", no_argument, 0, 's'}, 460 {"reject-file", required_argument, 0, 'r'}, 461 {"remove-empty-files", no_argument, 0, 'E'}, 462 {"reverse", no_argument, 0, 'R'}, 463 {"silent", no_argument, 0, 's'}, 464 {"strip", required_argument, 0, 'p'}, 465 {"suffix", required_argument, 0, 'z'}, 466 {"unified", no_argument, 0, 'u'}, 467 {"version", no_argument, 0, 'v'}, 468 {"version-control", required_argument, 0, 'V'}, 469 {"posix", no_argument, &posix, 1}, 470 {NULL, 0, 0, 0} 471 }; 472 int ch; 473 474 rejname[0] = '\0'; 475 Argc_last = Argc; 476 Argv_last = Argv; 477 if (!Argc) 478 return; 479 optreset = optind = 1; 480 while ((ch = getopt_long(Argc, Argv, options, longopts, NULL)) != -1) { 481 switch (ch) { 482 case 'b': 483 if (backup_type == none) 484 backup_type = numbered_existing; 485 if (optarg == NULL) 486 break; 487 if (verbose) 488 say("Warning, the ``-b suffix'' option has been" 489 " obsoleted by the -z option.\n"); 490 /* FALLTHROUGH */ 491 case 'z': 492 /* must directly follow 'b' case for backwards compat */ 493 simple_backup_suffix = savestr(optarg); 494 break; 495 case 'B': 496 origprae = savestr(optarg); 497 break; 498 case 'c': 499 diff_type = CONTEXT_DIFF; 500 break; 501 case 'C': 502 check_only = true; 503 break; 504 case 'd': 505 if (chdir(optarg) < 0) 506 pfatal("can't cd to %s", optarg); 507 break; 508 case 'D': 509 do_defines = true; 510 if (!isalpha((unsigned char)*optarg) && *optarg != '_') 511 fatal("argument to -D is not an identifier\n"); 512 snprintf(if_defined, sizeof if_defined, 513 "#ifdef %s\n", optarg); 514 snprintf(not_defined, sizeof not_defined, 515 "#ifndef %s\n", optarg); 516 snprintf(end_defined, sizeof end_defined, 517 "#endif /* %s */\n", optarg); 518 break; 519 case 'e': 520 diff_type = ED_DIFF; 521 break; 522 case 'E': 523 remove_empty_files = true; 524 break; 525 case 'f': 526 force = true; 527 break; 528 case 'F': 529 maxfuzz = atoi(optarg); 530 break; 531 case 'i': 532 if (++filec == MAXFILEC) 533 fatal("too many file arguments\n"); 534 filearg[filec] = savestr(optarg); 535 break; 536 case 'l': 537 canonicalize = true; 538 break; 539 case 'n': 540 diff_type = NORMAL_DIFF; 541 break; 542 case 'N': 543 noreverse = true; 544 break; 545 case 'o': 546 outname = savestr(optarg); 547 break; 548 case 'p': 549 strippath = atoi(optarg); 550 break; 551 case 'r': 552 if (strlcpy(rejname, optarg, 553 sizeof(rejname)) >= sizeof(rejname)) 554 fatal("argument for -r is too long\n"); 555 break; 556 case 'R': 557 reverse = true; 558 reverse_flag_specified = true; 559 break; 560 case 's': 561 verbose = false; 562 break; 563 case 't': 564 batch = true; 565 break; 566 case 'u': 567 diff_type = UNI_DIFF; 568 break; 569 case 'v': 570 version(); 571 break; 572 case 'V': 573 backup_type = get_version(optarg); 574 break; 575 #ifdef DEBUGGING 576 case 'x': 577 debug = atoi(optarg); 578 break; 579 #endif 580 default: 581 if (ch != '\0') 582 usage(); 583 break; 584 } 585 } 586 Argc -= optind; 587 Argv += optind; 588 589 if (Argc > 0) { 590 filearg[0] = savestr(*Argv++); 591 Argc--; 592 while (Argc > 0) { 593 if (++filec == MAXFILEC) 594 fatal("too many file arguments\n"); 595 filearg[filec] = savestr(*Argv++); 596 Argc--; 597 } 598 } 599 600 if (getenv("POSIXLY_CORRECT") != NULL) 601 posix = 1; 602 } 603 604 static void 605 usage(void) 606 { 607 fprintf(stderr, 608 "usage: patch [-bcCeEflnNRstuv] [-B backup-prefix] [-d directory] [-D symbol]\n" 609 " [-F max-fuzz] [-i patchfile] [-o out-file] [-p strip-count]\n" 610 " [-r rej-name] [-V {numbered,existing,simple}] [-z backup-ext]\n" 611 " [origfile [patchfile]]\n"); 612 my_exit(EXIT_SUCCESS); 613 } 614 615 /* 616 * Attempt to find the right place to apply this hunk of patch. 617 */ 618 static LINENUM 619 locate_hunk(LINENUM fuzz) 620 { 621 LINENUM first_guess = pch_first() + last_offset; 622 LINENUM offset; 623 LINENUM pat_lines = pch_ptrn_lines(); 624 LINENUM max_pos_offset = input_lines - first_guess - pat_lines + 1; 625 LINENUM max_neg_offset = first_guess - last_frozen_line - 1 + pch_context(); 626 627 if (pat_lines == 0) { /* null range matches always */ 628 if (verbose && fuzz == 0 && (diff_type == CONTEXT_DIFF 629 || diff_type == NEW_CONTEXT_DIFF 630 || diff_type == UNI_DIFF)) { 631 say("Empty context always matches.\n"); 632 } 633 if (diff_type == CONTEXT_DIFF 634 || diff_type == NEW_CONTEXT_DIFF 635 || diff_type == UNI_DIFF) { 636 if (fuzz == 0) 637 return (input_lines == 0 ? first_guess : 0); 638 } else 639 return (first_guess); 640 } 641 if (max_neg_offset >= first_guess) /* do not try lines < 0 */ 642 max_neg_offset = first_guess - 1; 643 if (first_guess <= input_lines && patch_match(first_guess, 0, fuzz)) 644 return first_guess; 645 for (offset = 1; ; offset++) { 646 bool check_after = (offset <= max_pos_offset); 647 bool check_before = (offset <= max_neg_offset); 648 649 if (check_after && patch_match(first_guess, offset, fuzz)) { 650 #ifdef DEBUGGING 651 if (debug & 1) 652 say("Offset changing from %ld to %ld\n", 653 last_offset, offset); 654 #endif 655 last_offset = offset; 656 return first_guess + offset; 657 } else if (check_before && patch_match(first_guess, -offset, fuzz)) { 658 #ifdef DEBUGGING 659 if (debug & 1) 660 say("Offset changing from %ld to %ld\n", 661 last_offset, -offset); 662 #endif 663 last_offset = -offset; 664 return first_guess - offset; 665 } else if (!check_before && !check_after) 666 return 0; 667 } 668 } 669 670 /* We did not find the pattern, dump out the hunk so they can handle it. */ 671 672 static void 673 abort_context_hunk(void) 674 { 675 LINENUM i; 676 const LINENUM pat_end = pch_end(); 677 /* 678 * add in last_offset to guess the same as the previous successful 679 * hunk 680 */ 681 const LINENUM oldfirst = pch_first() + last_offset; 682 const LINENUM newfirst = pch_newfirst() + last_offset; 683 const LINENUM oldlast = oldfirst + pch_ptrn_lines() - 1; 684 const LINENUM newlast = newfirst + pch_repl_lines() - 1; 685 const char *stars = (diff_type >= NEW_CONTEXT_DIFF ? " ****" : ""); 686 const char *minuses = (diff_type >= NEW_CONTEXT_DIFF ? " ----" : " -----"); 687 688 fprintf(rejfp, "***************\n"); 689 for (i = 0; i <= pat_end; i++) { 690 switch (pch_char(i)) { 691 case '*': 692 if (oldlast < oldfirst) 693 fprintf(rejfp, "*** 0%s\n", stars); 694 else if (oldlast == oldfirst) 695 fprintf(rejfp, "*** %ld%s\n", oldfirst, stars); 696 else 697 fprintf(rejfp, "*** %ld,%ld%s\n", oldfirst, 698 oldlast, stars); 699 break; 700 case '=': 701 if (newlast < newfirst) 702 fprintf(rejfp, "--- 0%s\n", minuses); 703 else if (newlast == newfirst) 704 fprintf(rejfp, "--- %ld%s\n", newfirst, minuses); 705 else 706 fprintf(rejfp, "--- %ld,%ld%s\n", newfirst, 707 newlast, minuses); 708 break; 709 case '\n': 710 fprintf(rejfp, "%s", pfetch(i)); 711 break; 712 case ' ': 713 case '-': 714 case '+': 715 case '!': 716 fprintf(rejfp, "%c %s", pch_char(i), pfetch(i)); 717 break; 718 default: 719 fatal("fatal internal error in abort_context_hunk\n"); 720 } 721 } 722 } 723 724 static void 725 rej_line(int ch, LINENUM i) 726 { 727 size_t len; 728 const char *line = pfetch(i); 729 730 len = strlen(line); 731 732 fprintf(rejfp, "%c%s", ch, line); 733 if (len == 0 || line[len-1] != '\n') 734 fprintf(rejfp, "\n\\ No newline at end of file\n"); 735 } 736 737 static void 738 abort_hunk(void) 739 { 740 LINENUM i, j, split; 741 int ch1, ch2; 742 const LINENUM pat_end = pch_end(); 743 const LINENUM oldfirst = pch_first() + last_offset; 744 const LINENUM newfirst = pch_newfirst() + last_offset; 745 746 if (diff_type != UNI_DIFF) { 747 abort_context_hunk(); 748 return; 749 } 750 split = -1; 751 for (i = 0; i <= pat_end; i++) { 752 if (pch_char(i) == '=') { 753 split = i; 754 break; 755 } 756 } 757 if (split == -1) { 758 fprintf(rejfp, "malformed hunk: no split found\n"); 759 return; 760 } 761 i = 0; 762 j = split + 1; 763 fprintf(rejfp, "@@ -%ld,%ld +%ld,%ld @@\n", 764 pch_ptrn_lines() ? oldfirst : 0, 765 pch_ptrn_lines(), newfirst, pch_repl_lines()); 766 while (i < split || j <= pat_end) { 767 ch1 = i < split ? pch_char(i) : -1; 768 ch2 = j <= pat_end ? pch_char(j) : -1; 769 if (ch1 == '-') { 770 rej_line('-', i); 771 i++; 772 } else if (ch1 == ' ' && ch2 == ' ') { 773 rej_line(' ', i); 774 i++; 775 j++; 776 } else if (ch1 == '!' && ch2 == '!') { 777 while (i < split && ch1 == '!') { 778 rej_line('-', i); 779 i++; 780 ch1 = i < split ? pch_char(i) : -1; 781 } 782 while (j <= pat_end && ch2 == '!') { 783 rej_line('+', j); 784 j++; 785 ch2 = j <= pat_end ? pch_char(j) : -1; 786 } 787 } else if (ch1 == '*') { 788 i++; 789 } else if (ch2 == '+' || ch2 == ' ') { 790 rej_line(ch2, j); 791 j++; 792 } else { 793 fprintf(rejfp, "internal error on (%ld %ld %ld)\n", 794 i, split, j); 795 rej_line(ch1, i); 796 rej_line(ch2, j); 797 return; 798 } 799 } 800 } 801 802 /* We found where to apply it (we hope), so do it. */ 803 804 static void 805 apply_hunk(LINENUM where) 806 { 807 LINENUM old = 1; 808 const LINENUM lastline = pch_ptrn_lines(); 809 LINENUM new = lastline + 1; 810 #define OUTSIDE 0 811 #define IN_IFNDEF 1 812 #define IN_IFDEF 2 813 #define IN_ELSE 3 814 int def_state = OUTSIDE; 815 const LINENUM pat_end = pch_end(); 816 817 where--; 818 while (pch_char(new) == '=' || pch_char(new) == '\n') 819 new++; 820 821 while (old <= lastline) { 822 if (pch_char(old) == '-') { 823 copy_till(where + old - 1, false); 824 if (do_defines) { 825 if (def_state == OUTSIDE) { 826 fputs(not_defined, ofp); 827 def_state = IN_IFNDEF; 828 } else if (def_state == IN_IFDEF) { 829 fputs(else_defined, ofp); 830 def_state = IN_ELSE; 831 } 832 fputs(pfetch(old), ofp); 833 } 834 last_frozen_line++; 835 old++; 836 } else if (new > pat_end) { 837 break; 838 } else if (pch_char(new) == '+') { 839 copy_till(where + old - 1, false); 840 if (do_defines) { 841 if (def_state == IN_IFNDEF) { 842 fputs(else_defined, ofp); 843 def_state = IN_ELSE; 844 } else if (def_state == OUTSIDE) { 845 fputs(if_defined, ofp); 846 def_state = IN_IFDEF; 847 } 848 } 849 fputs(pfetch(new), ofp); 850 new++; 851 } else if (pch_char(new) != pch_char(old)) { 852 say("Out-of-sync patch, lines %ld,%ld--mangled text or line numbers, maybe?\n", 853 pch_hunk_beg() + old, 854 pch_hunk_beg() + new); 855 #ifdef DEBUGGING 856 say("oldchar = '%c', newchar = '%c'\n", 857 pch_char(old), pch_char(new)); 858 #endif 859 my_exit(2); 860 } else if (pch_char(new) == '!') { 861 copy_till(where + old - 1, false); 862 if (do_defines) { 863 fputs(not_defined, ofp); 864 def_state = IN_IFNDEF; 865 } 866 while (pch_char(old) == '!') { 867 if (do_defines) { 868 fputs(pfetch(old), ofp); 869 } 870 last_frozen_line++; 871 old++; 872 } 873 if (do_defines) { 874 fputs(else_defined, ofp); 875 def_state = IN_ELSE; 876 } 877 while (pch_char(new) == '!') { 878 fputs(pfetch(new), ofp); 879 new++; 880 } 881 } else { 882 if (pch_char(new) != ' ') 883 fatal("Internal error: expected ' '\n"); 884 old++; 885 new++; 886 if (do_defines && def_state != OUTSIDE) { 887 fputs(end_defined, ofp); 888 def_state = OUTSIDE; 889 } 890 } 891 } 892 if (new <= pat_end && pch_char(new) == '+') { 893 copy_till(where + old - 1, false); 894 if (do_defines) { 895 if (def_state == OUTSIDE) { 896 fputs(if_defined, ofp); 897 def_state = IN_IFDEF; 898 } else if (def_state == IN_IFNDEF) { 899 fputs(else_defined, ofp); 900 def_state = IN_ELSE; 901 } 902 } 903 while (new <= pat_end && pch_char(new) == '+') { 904 fputs(pfetch(new), ofp); 905 new++; 906 } 907 } 908 if (do_defines && def_state != OUTSIDE) { 909 fputs(end_defined, ofp); 910 } 911 } 912 913 /* 914 * Open the new file. 915 */ 916 static void 917 init_output(const char *name) 918 { 919 ofp = fopen(name, "w"); 920 if (ofp == NULL) 921 pfatal("can't create %s", name); 922 } 923 924 /* 925 * Open a file to put hunks we can't locate. 926 */ 927 static void 928 init_reject(const char *name) 929 { 930 rejfp = fopen(name, "w"); 931 if (rejfp == NULL) 932 pfatal("can't create %s", name); 933 } 934 935 /* 936 * Copy input file to output, up to wherever hunk is to be applied. 937 * If endoffile is true, treat the last line specially since it may 938 * lack a newline. 939 */ 940 static void 941 copy_till(LINENUM lastline, bool endoffile) 942 { 943 if (last_frozen_line > lastline) 944 fatal("misordered hunks! output would be garbled\n"); 945 while (last_frozen_line < lastline) { 946 if (++last_frozen_line == lastline && endoffile) 947 dump_line(last_frozen_line, !last_line_missing_eol); 948 else 949 dump_line(last_frozen_line, true); 950 } 951 } 952 953 /* 954 * Finish copying the input file to the output file. 955 */ 956 static void 957 spew_output(void) 958 { 959 #ifdef DEBUGGING 960 if (debug & 256) 961 say("il=%ld lfl=%ld\n", input_lines, last_frozen_line); 962 #endif 963 if (input_lines) 964 copy_till(input_lines, true); /* dump remainder of file */ 965 fclose(ofp); 966 ofp = NULL; 967 } 968 969 /* 970 * Copy one line from input to output. 971 */ 972 static void 973 dump_line(LINENUM line, bool write_newline) 974 { 975 char *s; 976 977 s = ifetch(line, 0); 978 if (s == NULL) 979 return; 980 /* Note: string is not NUL terminated. */ 981 for (; *s != '\n'; s++) 982 putc(*s, ofp); 983 if (write_newline) 984 putc('\n', ofp); 985 } 986 987 /* 988 * Does the patch pattern match at line base+offset? 989 */ 990 static bool 991 patch_match(LINENUM base, LINENUM offset, LINENUM fuzz) 992 { 993 LINENUM pline = 1 + fuzz; 994 LINENUM iline; 995 LINENUM pat_lines = pch_ptrn_lines() - fuzz; 996 const char *ilineptr; 997 const char *plineptr; 998 short plinelen; 999 1000 for (iline = base + offset + fuzz; pline <= pat_lines; pline++, iline++) { 1001 ilineptr = ifetch(iline, offset >= 0); 1002 if (ilineptr == NULL) 1003 return false; 1004 plineptr = pfetch(pline); 1005 plinelen = pch_line_len(pline); 1006 if (canonicalize) { 1007 if (!similar(ilineptr, plineptr, plinelen)) 1008 return false; 1009 } else if (strnNE(ilineptr, plineptr, plinelen)) 1010 return false; 1011 if (iline == input_lines) { 1012 /* 1013 * We are looking at the last line of the file. 1014 * If the file has no eol, the patch line should 1015 * not have one either and vice-versa. Note that 1016 * plinelen > 0. 1017 */ 1018 if (last_line_missing_eol) { 1019 if (plineptr[plinelen - 1] == '\n') 1020 return false; 1021 } else { 1022 if (plineptr[plinelen - 1] != '\n') 1023 return false; 1024 } 1025 } 1026 } 1027 return true; 1028 } 1029 1030 /* 1031 * Do two lines match with canonicalized white space? 1032 */ 1033 static bool 1034 similar(const char *a, const char *b, int len) 1035 { 1036 while (len) { 1037 if (isspace((unsigned char)*b)) { /* whitespace (or \n) to match? */ 1038 if (!isspace((unsigned char)*a)) /* no corresponding whitespace? */ 1039 return false; 1040 while (len && isspace((unsigned char)*b) && *b != '\n') 1041 b++, len--; /* skip pattern whitespace */ 1042 while (isspace((unsigned char)*a) && *a != '\n') 1043 a++; /* skip target whitespace */ 1044 if (*a == '\n' || *b == '\n') 1045 return (*a == *b); /* should end in sync */ 1046 } else if (*a++ != *b++) /* match non-whitespace chars */ 1047 return false; 1048 else 1049 len--; /* probably not necessary */ 1050 } 1051 return true; /* actually, this is not reached */ 1052 /* since there is always a \n */ 1053 } 1054