1 /*- 2 * Copyright 1986, Larry Wall 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following condition is met: 6 * 1. Redistributions of source code must retain the above copyright notice, 7 * this condition and the following disclaimer. 8 * 9 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY 10 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 11 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 12 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 13 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 14 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 15 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 16 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 17 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 18 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 19 * SUCH DAMAGE. 20 * 21 * patch - a program to apply diffs to original files 22 * 23 * -C option added in 1998, original code by Marc Espie, based on FreeBSD 24 * behaviour 25 * 26 * $OpenBSD: patch.c,v 1.54 2014/12/13 10:31:07 tobias Exp $ 27 * $FreeBSD$ 28 * 29 */ 30 31 #include <sys/types.h> 32 #include <sys/stat.h> 33 34 #include <ctype.h> 35 #include <getopt.h> 36 #include <limits.h> 37 #include <stdio.h> 38 #include <string.h> 39 #include <stdlib.h> 40 #include <unistd.h> 41 42 #include "common.h" 43 #include "util.h" 44 #include "pch.h" 45 #include "inp.h" 46 #include "backupfile.h" 47 #include "pathnames.h" 48 49 mode_t filemode = 0644; 50 51 char *buf; /* general purpose buffer */ 52 size_t buf_size; /* size of the general purpose buffer */ 53 54 bool using_plan_a = true; /* try to keep everything in memory */ 55 bool out_of_mem = false; /* ran out of memory in plan a */ 56 57 #define MAXFILEC 2 58 59 char *filearg[MAXFILEC]; 60 bool ok_to_create_file = false; 61 char *outname = NULL; 62 char *origprae = NULL; 63 char *TMPOUTNAME; 64 char *TMPINNAME; 65 char *TMPREJNAME; 66 char *TMPPATNAME; 67 bool toutkeep = false; 68 bool trejkeep = false; 69 bool warn_on_invalid_line; 70 bool last_line_missing_eol; 71 72 #ifdef DEBUGGING 73 int debug = 0; 74 #endif 75 76 bool force = false; 77 bool batch = false; 78 bool verbose = true; 79 bool reverse = false; 80 bool noreverse = false; 81 bool skip_rest_of_patch = false; 82 int strippath = 957; 83 bool canonicalize = false; 84 bool check_only = false; 85 int diff_type = 0; 86 char *revision = NULL; /* prerequisite revision, if any */ 87 LINENUM input_lines = 0; /* how long is input file in lines */ 88 int posix = 0; /* strict POSIX mode? */ 89 90 static void reinitialize_almost_everything(void); 91 static void get_some_switches(void); 92 static LINENUM locate_hunk(LINENUM); 93 static void abort_context_hunk(void); 94 static void rej_line(int, LINENUM); 95 static void abort_hunk(void); 96 static void apply_hunk(LINENUM); 97 static void init_output(const char *); 98 static void init_reject(const char *); 99 static void copy_till(LINENUM, bool); 100 static bool spew_output(void); 101 static void dump_line(LINENUM, bool); 102 static bool patch_match(LINENUM, LINENUM, LINENUM); 103 static bool similar(const char *, const char *, int); 104 static void usage(void); 105 106 /* true if -E was specified on command line. */ 107 static bool remove_empty_files = false; 108 109 /* true if -R was specified on command line. */ 110 static bool reverse_flag_specified = false; 111 112 /* buffer holding the name of the rejected patch file. */ 113 static char rejname[NAME_MAX + 1]; 114 115 /* how many input lines have been irretractibly output */ 116 static LINENUM last_frozen_line = 0; 117 118 static int Argc; /* guess */ 119 static char **Argv; 120 static int Argc_last; /* for restarting plan_b */ 121 static char **Argv_last; 122 123 static FILE *ofp = NULL; /* output file pointer */ 124 static FILE *rejfp = NULL; /* reject file pointer */ 125 126 static int filec = 0; /* how many file arguments? */ 127 static LINENUM last_offset = 0; 128 static LINENUM maxfuzz = 2; 129 130 /* patch using ifdef, ifndef, etc. */ 131 static bool do_defines = false; 132 /* #ifdef xyzzy */ 133 static char if_defined[128]; 134 /* #ifndef xyzzy */ 135 static char not_defined[128]; 136 /* #else */ 137 static const char else_defined[] = "#else\n"; 138 /* #endif xyzzy */ 139 static char end_defined[128]; 140 141 142 /* Apply a set of diffs as appropriate. */ 143 144 int 145 main(int argc, char *argv[]) 146 { 147 int error = 0, hunk, failed, i, fd; 148 bool patch_seen, reverse_seen; 149 LINENUM where = 0, newwhere, fuzz, mymaxfuzz; 150 const char *tmpdir; 151 char *v; 152 153 setvbuf(stdout, NULL, _IOLBF, 0); 154 setvbuf(stderr, NULL, _IOLBF, 0); 155 for (i = 0; i < MAXFILEC; i++) 156 filearg[i] = NULL; 157 158 buf_size = INITLINELEN; 159 buf = malloc((unsigned)(buf_size)); 160 if (buf == NULL) 161 fatal("out of memory\n"); 162 163 /* Cons up the names of the temporary files. */ 164 if ((tmpdir = getenv("TMPDIR")) == NULL || *tmpdir == '\0') 165 tmpdir = _PATH_TMP; 166 for (i = strlen(tmpdir) - 1; i > 0 && tmpdir[i] == '/'; i--) 167 ; 168 i++; 169 if (asprintf(&TMPOUTNAME, "%.*s/patchoXXXXXXXXXX", i, tmpdir) == -1) 170 fatal("cannot allocate memory"); 171 if ((fd = mkstemp(TMPOUTNAME)) < 0) 172 pfatal("can't create %s", TMPOUTNAME); 173 close(fd); 174 175 if (asprintf(&TMPINNAME, "%.*s/patchiXXXXXXXXXX", i, tmpdir) == -1) 176 fatal("cannot allocate memory"); 177 if ((fd = mkstemp(TMPINNAME)) < 0) 178 pfatal("can't create %s", TMPINNAME); 179 close(fd); 180 181 if (asprintf(&TMPREJNAME, "%.*s/patchrXXXXXXXXXX", i, tmpdir) == -1) 182 fatal("cannot allocate memory"); 183 if ((fd = mkstemp(TMPREJNAME)) < 0) 184 pfatal("can't create %s", TMPREJNAME); 185 close(fd); 186 187 if (asprintf(&TMPPATNAME, "%.*s/patchpXXXXXXXXXX", i, tmpdir) == -1) 188 fatal("cannot allocate memory"); 189 if ((fd = mkstemp(TMPPATNAME)) < 0) 190 pfatal("can't create %s", TMPPATNAME); 191 close(fd); 192 193 v = getenv("SIMPLE_BACKUP_SUFFIX"); 194 if (v) 195 simple_backup_suffix = v; 196 else 197 simple_backup_suffix = ORIGEXT; 198 199 /* parse switches */ 200 Argc = argc; 201 Argv = argv; 202 get_some_switches(); 203 204 if (backup_type == none) { 205 if ((v = getenv("PATCH_VERSION_CONTROL")) == NULL) 206 v = getenv("VERSION_CONTROL"); 207 if (v != NULL || !posix) 208 backup_type = get_version(v); /* OK to pass NULL. */ 209 } 210 211 /* make sure we clean up /tmp in case of disaster */ 212 set_signals(0); 213 214 patch_seen = false; 215 for (open_patch_file(filearg[1]); there_is_another_patch(); 216 reinitialize_almost_everything()) { 217 /* for each patch in patch file */ 218 219 patch_seen = true; 220 221 warn_on_invalid_line = true; 222 223 if (outname == NULL) 224 outname = xstrdup(filearg[0]); 225 226 /* for ed script just up and do it and exit */ 227 if (diff_type == ED_DIFF) { 228 do_ed_script(); 229 continue; 230 } 231 /* initialize the patched file */ 232 if (!skip_rest_of_patch) 233 init_output(TMPOUTNAME); 234 235 /* initialize reject file */ 236 init_reject(TMPREJNAME); 237 238 /* find out where all the lines are */ 239 if (!skip_rest_of_patch) 240 scan_input(filearg[0]); 241 242 /* 243 * from here on, open no standard i/o files, because 244 * malloc might misfire and we can't catch it easily 245 */ 246 247 /* apply each hunk of patch */ 248 hunk = 0; 249 failed = 0; 250 reverse_seen = false; 251 out_of_mem = false; 252 while (another_hunk()) { 253 hunk++; 254 fuzz = 0; 255 mymaxfuzz = pch_context(); 256 if (maxfuzz < mymaxfuzz) 257 mymaxfuzz = maxfuzz; 258 if (!skip_rest_of_patch) { 259 do { 260 where = locate_hunk(fuzz); 261 if (hunk == 1 && where == 0 && !force && !reverse_seen) { 262 /* dwim for reversed patch? */ 263 if (!pch_swap()) { 264 if (fuzz == 0) 265 say("Not enough memory to try swapped hunk! Assuming unswapped.\n"); 266 continue; 267 } 268 reverse = !reverse; 269 /* try again */ 270 where = locate_hunk(fuzz); 271 if (where == 0) { 272 /* didn't find it swapped */ 273 if (!pch_swap()) 274 /* put it back to normal */ 275 fatal("lost hunk on alloc error!\n"); 276 reverse = !reverse; 277 } else if (noreverse) { 278 if (!pch_swap()) 279 /* put it back to normal */ 280 fatal("lost hunk on alloc error!\n"); 281 reverse = !reverse; 282 say("Ignoring previously applied (or reversed) patch.\n"); 283 skip_rest_of_patch = true; 284 } else if (batch) { 285 if (verbose) 286 say("%seversed (or previously applied) patch detected! %s -R.", 287 reverse ? "R" : "Unr", 288 reverse ? "Assuming" : "Ignoring"); 289 } else { 290 ask("%seversed (or previously applied) patch detected! %s -R? [y] ", 291 reverse ? "R" : "Unr", 292 reverse ? "Assume" : "Ignore"); 293 if (*buf == 'n') { 294 ask("Apply anyway? [n] "); 295 if (*buf != 'y') 296 skip_rest_of_patch = true; 297 else 298 reverse_seen = true; 299 where = 0; 300 reverse = !reverse; 301 if (!pch_swap()) 302 /* put it back to normal */ 303 fatal("lost hunk on alloc error!\n"); 304 } 305 } 306 } 307 } while (!skip_rest_of_patch && where == 0 && 308 ++fuzz <= mymaxfuzz); 309 310 if (skip_rest_of_patch) { /* just got decided */ 311 if (ferror(ofp) || fclose(ofp)) { 312 say("Error writing %s\n", 313 TMPOUTNAME); 314 error = 1; 315 } 316 ofp = NULL; 317 } 318 } 319 newwhere = pch_newfirst() + last_offset; 320 if (skip_rest_of_patch) { 321 abort_hunk(); 322 failed++; 323 if (verbose) 324 say("Hunk #%d ignored at %ld.\n", 325 hunk, newwhere); 326 } else if (where == 0) { 327 abort_hunk(); 328 failed++; 329 if (verbose) 330 say("Hunk #%d failed at %ld.\n", 331 hunk, newwhere); 332 } else { 333 apply_hunk(where); 334 if (verbose) { 335 say("Hunk #%d succeeded at %ld", 336 hunk, newwhere); 337 if (fuzz != 0) 338 say(" with fuzz %ld", fuzz); 339 if (last_offset) 340 say(" (offset %ld line%s)", 341 last_offset, 342 last_offset == 1L ? "" : "s"); 343 say(".\n"); 344 } 345 } 346 } 347 348 if (out_of_mem && using_plan_a) { 349 Argc = Argc_last; 350 Argv = Argv_last; 351 say("\n\nRan out of memory using Plan A--trying again...\n\n"); 352 if (ofp) 353 fclose(ofp); 354 ofp = NULL; 355 if (rejfp) 356 fclose(rejfp); 357 rejfp = NULL; 358 continue; 359 } 360 if (hunk == 0) 361 fatal("Internal error: hunk should not be 0\n"); 362 363 /* finish spewing out the new file */ 364 if (!skip_rest_of_patch && !spew_output()) { 365 say("Can't write %s\n", TMPOUTNAME); 366 error = 1; 367 } 368 369 /* and put the output where desired */ 370 ignore_signals(); 371 if (!skip_rest_of_patch) { 372 struct stat statbuf; 373 char *realout = outname; 374 375 if (!check_only) { 376 if (move_file(TMPOUTNAME, outname) < 0) { 377 toutkeep = true; 378 realout = TMPOUTNAME; 379 chmod(TMPOUTNAME, filemode); 380 } else 381 chmod(outname, filemode); 382 383 if (remove_empty_files && 384 stat(realout, &statbuf) == 0 && 385 statbuf.st_size == 0) { 386 if (verbose) 387 say("Removing %s (empty after patching).\n", 388 realout); 389 unlink(realout); 390 } 391 } 392 } 393 if (ferror(rejfp) || fclose(rejfp)) { 394 say("Error writing %s\n", rejname); 395 error = 1; 396 } 397 rejfp = NULL; 398 if (failed) { 399 error = 1; 400 if (*rejname == '\0') { 401 if (strlcpy(rejname, outname, 402 sizeof(rejname)) >= sizeof(rejname)) 403 fatal("filename %s is too long\n", outname); 404 if (strlcat(rejname, REJEXT, 405 sizeof(rejname)) >= sizeof(rejname)) 406 fatal("filename %s is too long\n", outname); 407 } 408 if (!check_only) 409 say("%d out of %d hunks %s--saving rejects to %s\n", 410 failed, hunk, skip_rest_of_patch ? "ignored" : "failed", rejname); 411 else 412 say("%d out of %d hunks %s while patching %s\n", 413 failed, hunk, skip_rest_of_patch ? "ignored" : "failed", filearg[0]); 414 if (!check_only && move_file(TMPREJNAME, rejname) < 0) 415 trejkeep = true; 416 } 417 set_signals(1); 418 } 419 420 if (!patch_seen) 421 error = 2; 422 423 my_exit(error); 424 /* NOTREACHED */ 425 } 426 427 /* Prepare to find the next patch to do in the patch file. */ 428 429 static void 430 reinitialize_almost_everything(void) 431 { 432 re_patch(); 433 re_input(); 434 435 input_lines = 0; 436 last_frozen_line = 0; 437 438 filec = 0; 439 if (!out_of_mem) { 440 free(filearg[0]); 441 filearg[0] = NULL; 442 } 443 444 free(outname); 445 outname = NULL; 446 447 last_offset = 0; 448 diff_type = 0; 449 450 free(revision); 451 revision = NULL; 452 453 reverse = reverse_flag_specified; 454 skip_rest_of_patch = false; 455 456 get_some_switches(); 457 } 458 459 /* Process switches and filenames. */ 460 461 static void 462 get_some_switches(void) 463 { 464 const char *options = "b::B:cCd:D:eEfF:i:lnNo:p:r:RstuvV:x:z:"; 465 static struct option longopts[] = { 466 {"backup", no_argument, 0, 'b'}, 467 {"batch", no_argument, 0, 't'}, 468 {"check", no_argument, 0, 'C'}, 469 {"context", no_argument, 0, 'c'}, 470 {"debug", required_argument, 0, 'x'}, 471 {"directory", required_argument, 0, 'd'}, 472 {"dry-run", no_argument, 0, 'C'}, 473 {"ed", no_argument, 0, 'e'}, 474 {"force", no_argument, 0, 'f'}, 475 {"forward", no_argument, 0, 'N'}, 476 {"fuzz", required_argument, 0, 'F'}, 477 {"ifdef", required_argument, 0, 'D'}, 478 {"input", required_argument, 0, 'i'}, 479 {"ignore-whitespace", no_argument, 0, 'l'}, 480 {"normal", no_argument, 0, 'n'}, 481 {"output", required_argument, 0, 'o'}, 482 {"prefix", required_argument, 0, 'B'}, 483 {"quiet", no_argument, 0, 's'}, 484 {"reject-file", required_argument, 0, 'r'}, 485 {"remove-empty-files", no_argument, 0, 'E'}, 486 {"reverse", no_argument, 0, 'R'}, 487 {"silent", no_argument, 0, 's'}, 488 {"strip", required_argument, 0, 'p'}, 489 {"suffix", required_argument, 0, 'z'}, 490 {"unified", no_argument, 0, 'u'}, 491 {"version", no_argument, 0, 'v'}, 492 {"version-control", required_argument, 0, 'V'}, 493 {"posix", no_argument, &posix, 1}, 494 {NULL, 0, 0, 0} 495 }; 496 int ch; 497 498 rejname[0] = '\0'; 499 Argc_last = Argc; 500 Argv_last = Argv; 501 if (!Argc) 502 return; 503 optreset = optind = 1; 504 while ((ch = getopt_long(Argc, Argv, options, longopts, NULL)) != -1) { 505 switch (ch) { 506 case 'b': 507 if (backup_type == none) 508 backup_type = numbered_existing; 509 if (optarg == NULL) 510 break; 511 if (verbose) 512 say("Warning, the ``-b suffix'' option has been" 513 " obsoleted by the -z option.\n"); 514 /* FALLTHROUGH */ 515 case 'z': 516 /* must directly follow 'b' case for backwards compat */ 517 simple_backup_suffix = xstrdup(optarg); 518 break; 519 case 'B': 520 origprae = xstrdup(optarg); 521 break; 522 case 'c': 523 diff_type = CONTEXT_DIFF; 524 break; 525 case 'C': 526 check_only = true; 527 break; 528 case 'd': 529 if (chdir(optarg) < 0) 530 pfatal("can't cd to %s", optarg); 531 break; 532 case 'D': 533 do_defines = true; 534 if (!isalpha((unsigned char)*optarg) && *optarg != '_') 535 fatal("argument to -D is not an identifier\n"); 536 snprintf(if_defined, sizeof if_defined, 537 "#ifdef %s\n", optarg); 538 snprintf(not_defined, sizeof not_defined, 539 "#ifndef %s\n", optarg); 540 snprintf(end_defined, sizeof end_defined, 541 "#endif /* %s */\n", optarg); 542 break; 543 case 'e': 544 diff_type = ED_DIFF; 545 break; 546 case 'E': 547 remove_empty_files = true; 548 break; 549 case 'f': 550 force = true; 551 break; 552 case 'F': 553 maxfuzz = atoi(optarg); 554 break; 555 case 'i': 556 if (++filec == MAXFILEC) 557 fatal("too many file arguments\n"); 558 filearg[filec] = xstrdup(optarg); 559 break; 560 case 'l': 561 canonicalize = true; 562 break; 563 case 'n': 564 diff_type = NORMAL_DIFF; 565 break; 566 case 'N': 567 noreverse = true; 568 break; 569 case 'o': 570 outname = xstrdup(optarg); 571 break; 572 case 'p': 573 strippath = atoi(optarg); 574 break; 575 case 'r': 576 if (strlcpy(rejname, optarg, 577 sizeof(rejname)) >= sizeof(rejname)) 578 fatal("argument for -r is too long\n"); 579 break; 580 case 'R': 581 reverse = true; 582 reverse_flag_specified = true; 583 break; 584 case 's': 585 verbose = false; 586 break; 587 case 't': 588 batch = true; 589 break; 590 case 'u': 591 diff_type = UNI_DIFF; 592 break; 593 case 'v': 594 version(); 595 break; 596 case 'V': 597 backup_type = get_version(optarg); 598 break; 599 #ifdef DEBUGGING 600 case 'x': 601 debug = atoi(optarg); 602 break; 603 #endif 604 default: 605 if (ch != '\0') 606 usage(); 607 break; 608 } 609 } 610 Argc -= optind; 611 Argv += optind; 612 613 if (Argc > 0) { 614 filearg[0] = xstrdup(*Argv++); 615 Argc--; 616 while (Argc > 0) { 617 if (++filec == MAXFILEC) 618 fatal("too many file arguments\n"); 619 filearg[filec] = xstrdup(*Argv++); 620 Argc--; 621 } 622 } 623 624 if (getenv("POSIXLY_CORRECT") != NULL) 625 posix = 1; 626 } 627 628 static void 629 usage(void) 630 { 631 fprintf(stderr, 632 "usage: patch [-bCcEeflNnRstuv] [-B backup-prefix] [-D symbol] [-d directory]\n" 633 " [-F max-fuzz] [-i patchfile] [-o out-file] [-p strip-count]\n" 634 " [-r rej-name] [-V t | nil | never] [-x number] [-z backup-ext]\n" 635 " [--posix] [origfile [patchfile]]\n" 636 " patch <patchfile\n"); 637 my_exit(EXIT_FAILURE); 638 } 639 640 /* 641 * Attempt to find the right place to apply this hunk of patch. 642 */ 643 static LINENUM 644 locate_hunk(LINENUM fuzz) 645 { 646 LINENUM first_guess = pch_first() + last_offset; 647 LINENUM offset; 648 LINENUM pat_lines = pch_ptrn_lines(); 649 LINENUM max_pos_offset = input_lines - first_guess - pat_lines + 1; 650 LINENUM max_neg_offset = first_guess - last_frozen_line - 1 + pch_context(); 651 652 if (pat_lines == 0) { /* null range matches always */ 653 if (verbose && fuzz == 0 && (diff_type == CONTEXT_DIFF 654 || diff_type == NEW_CONTEXT_DIFF 655 || diff_type == UNI_DIFF)) { 656 say("Empty context always matches.\n"); 657 } 658 return (first_guess); 659 } 660 if (max_neg_offset >= first_guess) /* do not try lines < 0 */ 661 max_neg_offset = first_guess - 1; 662 if (first_guess <= input_lines && patch_match(first_guess, 0, fuzz)) 663 return first_guess; 664 for (offset = 1; ; offset++) { 665 bool check_after = (offset <= max_pos_offset); 666 bool check_before = (offset <= max_neg_offset); 667 668 if (check_after && patch_match(first_guess, offset, fuzz)) { 669 #ifdef DEBUGGING 670 if (debug & 1) 671 say("Offset changing from %ld to %ld\n", 672 last_offset, offset); 673 #endif 674 last_offset = offset; 675 return first_guess + offset; 676 } else if (check_before && patch_match(first_guess, -offset, fuzz)) { 677 #ifdef DEBUGGING 678 if (debug & 1) 679 say("Offset changing from %ld to %ld\n", 680 last_offset, -offset); 681 #endif 682 last_offset = -offset; 683 return first_guess - offset; 684 } else if (!check_before && !check_after) 685 return 0; 686 } 687 } 688 689 /* We did not find the pattern, dump out the hunk so they can handle it. */ 690 691 static void 692 abort_context_hunk(void) 693 { 694 LINENUM i; 695 const LINENUM pat_end = pch_end(); 696 /* 697 * add in last_offset to guess the same as the previous successful 698 * hunk 699 */ 700 const LINENUM oldfirst = pch_first() + last_offset; 701 const LINENUM newfirst = pch_newfirst() + last_offset; 702 const LINENUM oldlast = oldfirst + pch_ptrn_lines() - 1; 703 const LINENUM newlast = newfirst + pch_repl_lines() - 1; 704 const char *stars = (diff_type >= NEW_CONTEXT_DIFF ? " ****" : ""); 705 const char *minuses = (diff_type >= NEW_CONTEXT_DIFF ? " ----" : " -----"); 706 707 fprintf(rejfp, "***************\n"); 708 for (i = 0; i <= pat_end; i++) { 709 switch (pch_char(i)) { 710 case '*': 711 if (oldlast < oldfirst) 712 fprintf(rejfp, "*** 0%s\n", stars); 713 else if (oldlast == oldfirst) 714 fprintf(rejfp, "*** %ld%s\n", oldfirst, stars); 715 else 716 fprintf(rejfp, "*** %ld,%ld%s\n", oldfirst, 717 oldlast, stars); 718 break; 719 case '=': 720 if (newlast < newfirst) 721 fprintf(rejfp, "--- 0%s\n", minuses); 722 else if (newlast == newfirst) 723 fprintf(rejfp, "--- %ld%s\n", newfirst, minuses); 724 else 725 fprintf(rejfp, "--- %ld,%ld%s\n", newfirst, 726 newlast, minuses); 727 break; 728 case '\n': 729 fprintf(rejfp, "%s", pfetch(i)); 730 break; 731 case ' ': 732 case '-': 733 case '+': 734 case '!': 735 fprintf(rejfp, "%c %s", pch_char(i), pfetch(i)); 736 break; 737 default: 738 fatal("fatal internal error in abort_context_hunk\n"); 739 } 740 } 741 } 742 743 static void 744 rej_line(int ch, LINENUM i) 745 { 746 unsigned short len; 747 const char *line = pfetch(i); 748 749 len = strnlen(line, USHRT_MAX); 750 751 fprintf(rejfp, "%c%s", ch, line); 752 if (len == 0 || line[len-1] != '\n') { 753 if (len >= USHRT_MAX) 754 fprintf(rejfp, "\n\\ Line too long\n"); 755 else 756 fprintf(rejfp, "\n\\ No newline at end of line\n"); 757 } 758 } 759 760 static void 761 abort_hunk(void) 762 { 763 LINENUM i, j, split; 764 int ch1, ch2; 765 const LINENUM pat_end = pch_end(); 766 const LINENUM oldfirst = pch_first() + last_offset; 767 const LINENUM newfirst = pch_newfirst() + last_offset; 768 769 if (diff_type != UNI_DIFF) { 770 abort_context_hunk(); 771 return; 772 } 773 split = -1; 774 for (i = 0; i <= pat_end; i++) { 775 if (pch_char(i) == '=') { 776 split = i; 777 break; 778 } 779 } 780 if (split == -1) { 781 fprintf(rejfp, "malformed hunk: no split found\n"); 782 return; 783 } 784 i = 0; 785 j = split + 1; 786 fprintf(rejfp, "@@ -%ld,%ld +%ld,%ld @@\n", 787 pch_ptrn_lines() ? oldfirst : 0, 788 pch_ptrn_lines(), newfirst, pch_repl_lines()); 789 while (i < split || j <= pat_end) { 790 ch1 = i < split ? pch_char(i) : -1; 791 ch2 = j <= pat_end ? pch_char(j) : -1; 792 if (ch1 == '-') { 793 rej_line('-', i); 794 i++; 795 } else if (ch1 == ' ' && ch2 == ' ') { 796 rej_line(' ', i); 797 i++; 798 j++; 799 } else if (ch1 == '!' && ch2 == '!') { 800 while (i < split && ch1 == '!') { 801 rej_line('-', i); 802 i++; 803 ch1 = i < split ? pch_char(i) : -1; 804 } 805 while (j <= pat_end && ch2 == '!') { 806 rej_line('+', j); 807 j++; 808 ch2 = j <= pat_end ? pch_char(j) : -1; 809 } 810 } else if (ch1 == '*') { 811 i++; 812 } else if (ch2 == '+' || ch2 == ' ') { 813 rej_line(ch2, j); 814 j++; 815 } else { 816 fprintf(rejfp, "internal error on (%ld %ld %ld)\n", 817 i, split, j); 818 rej_line(ch1, i); 819 rej_line(ch2, j); 820 return; 821 } 822 } 823 } 824 825 /* We found where to apply it (we hope), so do it. */ 826 827 static void 828 apply_hunk(LINENUM where) 829 { 830 LINENUM old = 1; 831 const LINENUM lastline = pch_ptrn_lines(); 832 LINENUM new = lastline + 1; 833 #define OUTSIDE 0 834 #define IN_IFNDEF 1 835 #define IN_IFDEF 2 836 #define IN_ELSE 3 837 int def_state = OUTSIDE; 838 const LINENUM pat_end = pch_end(); 839 840 where--; 841 while (pch_char(new) == '=' || pch_char(new) == '\n') 842 new++; 843 844 while (old <= lastline) { 845 if (pch_char(old) == '-') { 846 copy_till(where + old - 1, false); 847 if (do_defines) { 848 if (def_state == OUTSIDE) { 849 fputs(not_defined, ofp); 850 def_state = IN_IFNDEF; 851 } else if (def_state == IN_IFDEF) { 852 fputs(else_defined, ofp); 853 def_state = IN_ELSE; 854 } 855 fputs(pfetch(old), ofp); 856 } 857 last_frozen_line++; 858 old++; 859 } else if (new > pat_end) { 860 break; 861 } else if (pch_char(new) == '+') { 862 copy_till(where + old - 1, false); 863 if (do_defines) { 864 if (def_state == IN_IFNDEF) { 865 fputs(else_defined, ofp); 866 def_state = IN_ELSE; 867 } else if (def_state == OUTSIDE) { 868 fputs(if_defined, ofp); 869 def_state = IN_IFDEF; 870 } 871 } 872 fputs(pfetch(new), ofp); 873 new++; 874 } else if (pch_char(new) != pch_char(old)) { 875 say("Out-of-sync patch, lines %ld,%ld--mangled text or line numbers, maybe?\n", 876 pch_hunk_beg() + old, 877 pch_hunk_beg() + new); 878 #ifdef DEBUGGING 879 say("oldchar = '%c', newchar = '%c'\n", 880 pch_char(old), pch_char(new)); 881 #endif 882 my_exit(2); 883 } else if (pch_char(new) == '!') { 884 copy_till(where + old - 1, false); 885 if (do_defines) { 886 fputs(not_defined, ofp); 887 def_state = IN_IFNDEF; 888 } 889 while (pch_char(old) == '!') { 890 if (do_defines) { 891 fputs(pfetch(old), ofp); 892 } 893 last_frozen_line++; 894 old++; 895 } 896 if (do_defines) { 897 fputs(else_defined, ofp); 898 def_state = IN_ELSE; 899 } 900 while (pch_char(new) == '!') { 901 fputs(pfetch(new), ofp); 902 new++; 903 } 904 } else { 905 if (pch_char(new) != ' ') 906 fatal("Internal error: expected ' '\n"); 907 old++; 908 new++; 909 if (do_defines && def_state != OUTSIDE) { 910 fputs(end_defined, ofp); 911 def_state = OUTSIDE; 912 } 913 } 914 } 915 if (new <= pat_end && pch_char(new) == '+') { 916 copy_till(where + old - 1, false); 917 if (do_defines) { 918 if (def_state == OUTSIDE) { 919 fputs(if_defined, ofp); 920 def_state = IN_IFDEF; 921 } else if (def_state == IN_IFNDEF) { 922 fputs(else_defined, ofp); 923 def_state = IN_ELSE; 924 } 925 } 926 while (new <= pat_end && pch_char(new) == '+') { 927 fputs(pfetch(new), ofp); 928 new++; 929 } 930 } 931 if (do_defines && def_state != OUTSIDE) { 932 fputs(end_defined, ofp); 933 } 934 } 935 936 /* 937 * Open the new file. 938 */ 939 static void 940 init_output(const char *name) 941 { 942 ofp = fopen(name, "w"); 943 if (ofp == NULL) 944 pfatal("can't create %s", name); 945 } 946 947 /* 948 * Open a file to put hunks we can't locate. 949 */ 950 static void 951 init_reject(const char *name) 952 { 953 rejfp = fopen(name, "w"); 954 if (rejfp == NULL) 955 pfatal("can't create %s", name); 956 } 957 958 /* 959 * Copy input file to output, up to wherever hunk is to be applied. 960 * If endoffile is true, treat the last line specially since it may 961 * lack a newline. 962 */ 963 static void 964 copy_till(LINENUM lastline, bool endoffile) 965 { 966 if (last_frozen_line > lastline) 967 fatal("misordered hunks! output would be garbled\n"); 968 while (last_frozen_line < lastline) { 969 if (++last_frozen_line == lastline && endoffile) 970 dump_line(last_frozen_line, !last_line_missing_eol); 971 else 972 dump_line(last_frozen_line, true); 973 } 974 } 975 976 /* 977 * Finish copying the input file to the output file. 978 */ 979 static bool 980 spew_output(void) 981 { 982 int rv; 983 984 #ifdef DEBUGGING 985 if (debug & 256) 986 say("il=%ld lfl=%ld\n", input_lines, last_frozen_line); 987 #endif 988 if (input_lines) 989 copy_till(input_lines, true); /* dump remainder of file */ 990 rv = ferror(ofp) == 0 && fclose(ofp) == 0; 991 ofp = NULL; 992 return rv; 993 } 994 995 /* 996 * Copy one line from input to output. 997 */ 998 static void 999 dump_line(LINENUM line, bool write_newline) 1000 { 1001 char *s; 1002 1003 s = ifetch(line, 0); 1004 if (s == NULL) 1005 return; 1006 /* Note: string is not NUL terminated. */ 1007 for (; *s != '\n'; s++) 1008 putc(*s, ofp); 1009 if (write_newline) 1010 putc('\n', ofp); 1011 } 1012 1013 /* 1014 * Does the patch pattern match at line base+offset? 1015 */ 1016 static bool 1017 patch_match(LINENUM base, LINENUM offset, LINENUM fuzz) 1018 { 1019 LINENUM pline = 1 + fuzz; 1020 LINENUM iline; 1021 LINENUM pat_lines = pch_ptrn_lines() - fuzz; 1022 const char *ilineptr; 1023 const char *plineptr; 1024 unsigned short plinelen; 1025 1026 for (iline = base + offset + fuzz; pline <= pat_lines; pline++, iline++) { 1027 ilineptr = ifetch(iline, offset >= 0); 1028 if (ilineptr == NULL) 1029 return false; 1030 plineptr = pfetch(pline); 1031 plinelen = pch_line_len(pline); 1032 if (canonicalize) { 1033 if (!similar(ilineptr, plineptr, plinelen)) 1034 return false; 1035 } else if (strnNE(ilineptr, plineptr, plinelen)) 1036 return false; 1037 if (iline == input_lines) { 1038 /* 1039 * We are looking at the last line of the file. 1040 * If the file has no eol, the patch line should 1041 * not have one either and vice-versa. Note that 1042 * plinelen > 0. 1043 */ 1044 if (last_line_missing_eol) { 1045 if (plineptr[plinelen - 1] == '\n') 1046 return false; 1047 } else { 1048 if (plineptr[plinelen - 1] != '\n') 1049 return false; 1050 } 1051 } 1052 } 1053 return true; 1054 } 1055 1056 /* 1057 * Do two lines match with canonicalized white space? 1058 */ 1059 static bool 1060 similar(const char *a, const char *b, int len) 1061 { 1062 while (len) { 1063 if (isspace((unsigned char)*b)) { /* whitespace (or \n) to match? */ 1064 if (!isspace((unsigned char)*a)) /* no corresponding whitespace? */ 1065 return false; 1066 while (len && isspace((unsigned char)*b) && *b != '\n') 1067 b++, len--; /* skip pattern whitespace */ 1068 while (isspace((unsigned char)*a) && *a != '\n') 1069 a++; /* skip target whitespace */ 1070 if (*a == '\n' || *b == '\n') 1071 return (*a == *b); /* should end in sync */ 1072 } else if (*a++ != *b++) /* match non-whitespace chars */ 1073 return false; 1074 else 1075 len--; /* probably not necessary */ 1076 } 1077 return true; /* actually, this is not reached */ 1078 /* since there is always a \n */ 1079 } 1080