patch.c revision 1.18
1 /* $NetBSD: patch.c,v 1.18 2003/07/08 01:55:35 kristerw Exp $ */ 2 3 /* patch - a program to apply diffs to original files 4 * 5 * Copyright 1986, Larry Wall 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following condition 9 * is met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this condition and the following disclaimer. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 #include <sys/cdefs.h> 27 #ifndef lint 28 __RCSID("$NetBSD: patch.c,v 1.18 2003/07/08 01:55:35 kristerw Exp $"); 29 #endif /* not lint */ 30 31 #include "INTERN.h" 32 #include "common.h" 33 #include "EXTERN.h" 34 #include "version.h" 35 #include "util.h" 36 #include "pch.h" 37 #include "inp.h" 38 #include "backupfile.h" 39 40 #include <stdlib.h> 41 #include <unistd.h> 42 43 /* procedures */ 44 static void reinitialize_almost_everything(void); 45 static char *nextarg(void); 46 static int optcmp(const void *, const void *); 47 static char decode_long_option(char *); 48 static void get_some_switches(void); 49 static LINENUM locate_hunk(LINENUM); 50 static void abort_hunk(void); 51 static void apply_hunk(LINENUM); 52 static void init_output(char *); 53 static void init_reject(char *); 54 static void copy_till(LINENUM); 55 static void spew_output(void); 56 static void dump_line(LINENUM); 57 static bool patch_match(LINENUM, LINENUM, LINENUM); 58 static bool similar(const char *, const char *, size_t); 59 int main(int, char *[]); 60 61 /* TRUE if -E was specified on command line. */ 62 static int remove_empty_files = FALSE; 63 64 /* TRUE if -R was specified on command line. */ 65 static int reverse_flag_specified = FALSE; 66 67 /* Apply a set of diffs as appropriate. */ 68 69 int 70 main(int argc, char *argv[]) 71 { 72 LINENUM where = 0; 73 LINENUM newwhere; 74 LINENUM fuzz; 75 LINENUM mymaxfuzz; 76 int hunk = 0; 77 int failed = 0; 78 int failtotal = 0; 79 int i; 80 81 for (i = 0; i<MAXFILEC; i++) 82 filearg[i] = NULL; 83 84 myuid = getuid(); 85 86 /* Cons up the names of the temporary files. */ 87 { 88 /* Directory for temporary files. */ 89 const char *tmpdir; 90 size_t tmpname_len; 91 92 tmpdir = getenv ("TMPDIR"); 93 if (tmpdir == NULL) { 94 tmpdir = "/tmp"; 95 } 96 tmpname_len = strlen (tmpdir) + 20; 97 98 TMPOUTNAME = xmalloc(tmpname_len); 99 strcpy (TMPOUTNAME, tmpdir); 100 strcat (TMPOUTNAME, "/patchoXXXXXX"); 101 if ((i = mkstemp(TMPOUTNAME)) < 0) 102 pfatal("can't create %s", TMPOUTNAME); 103 Close(i); 104 105 TMPINNAME = xmalloc(tmpname_len); 106 strcpy (TMPINNAME, tmpdir); 107 strcat (TMPINNAME, "/patchiXXXXXX"); 108 if ((i = mkstemp(TMPINNAME)) < 0) 109 pfatal("can't create %s", TMPINNAME); 110 Close(i); 111 112 TMPREJNAME = xmalloc(tmpname_len); 113 strcpy (TMPREJNAME, tmpdir); 114 strcat (TMPREJNAME, "/patchrXXXXXX"); 115 if ((i = mkstemp(TMPREJNAME)) < 0) 116 pfatal("can't create %s", TMPREJNAME); 117 Close(i); 118 119 TMPPATNAME = xmalloc(tmpname_len); 120 strcpy (TMPPATNAME, tmpdir); 121 strcat (TMPPATNAME, "/patchpXXXXXX"); 122 if ((i = mkstemp(TMPPATNAME)) < 0) 123 pfatal("can't create %s", TMPPATNAME); 124 Close(i); 125 } 126 127 { 128 char *v; 129 130 v = getenv ("SIMPLE_BACKUP_SUFFIX"); 131 if (v) 132 simple_backup_suffix = v; 133 else 134 simple_backup_suffix = ORIGEXT; 135 #ifndef NODIR 136 v = getenv ("VERSION_CONTROL"); 137 backup_type = get_version (v); /* OK to pass NULL. */ 138 #endif 139 } 140 141 /* parse switches */ 142 Argc = argc; 143 Argv = argv; 144 get_some_switches(); 145 146 /* make sure we clean up /tmp in case of disaster */ 147 set_signals(0); 148 149 for ( 150 open_patch_file(filearg[1]); 151 there_is_another_patch(); 152 reinitialize_almost_everything() 153 ) { /* for each patch in patch file */ 154 155 if (!skip_rest_of_patch && outname == NULL) 156 outname = xstrdup(filearg[0]); 157 158 /* for ed script just up and do it and exit */ 159 if (diff_type == ED_DIFF) { 160 do_ed_script(); 161 continue; 162 } 163 164 /* initialize the patched file */ 165 if (!skip_rest_of_patch) 166 init_output(TMPOUTNAME); 167 168 /* initialize reject file */ 169 init_reject(TMPREJNAME); 170 171 /* find out where all the lines are */ 172 if (!skip_rest_of_patch) 173 scan_input(filearg[0]); 174 175 /* from here on, open no standard i/o files, because malloc */ 176 /* might misfire and we can't catch it easily */ 177 178 /* apply each hunk of patch */ 179 hunk = 0; 180 failed = 0; 181 while (another_hunk()) { 182 hunk++; 183 fuzz = Nulline; 184 mymaxfuzz = pch_context(); 185 if (maxfuzz < mymaxfuzz) 186 mymaxfuzz = maxfuzz; 187 if (!skip_rest_of_patch) { 188 do { 189 where = locate_hunk(fuzz); 190 if (hunk == 1 && where == Nulline && !force) { 191 /* dwim for reversed patch? */ 192 if (!pch_swap()) { 193 if (fuzz == Nulline) 194 say( 195 "Not enough memory to try swapped hunk! Assuming unswapped.\n"); 196 continue; 197 } 198 reverse = !reverse; 199 where = locate_hunk(fuzz); /* try again */ 200 if (where == Nulline) { /* didn't find it swapped */ 201 if (!pch_swap()) /* put it back to normal */ 202 fatal("lost hunk on alloc error!\n"); 203 reverse = !reverse; 204 } 205 else if (noreverse) { 206 if (!pch_swap()) /* put it back to normal */ 207 fatal("lost hunk on alloc error!\n"); 208 reverse = !reverse; 209 say( 210 "Ignoring previously applied (or reversed) patch.\n"); 211 skip_rest_of_patch = TRUE; 212 } 213 else if (batch) { 214 if (verbose) 215 say( 216 "%seversed (or previously applied) patch detected! %s -R.", 217 reverse ? "R" : "Unr", 218 reverse ? "Assuming" : "Ignoring"); 219 } 220 else { 221 ask( 222 "%seversed (or previously applied) patch detected! %s -R? [y] ", 223 reverse ? "R" : "Unr", 224 reverse ? "Assume" : "Ignore"); 225 if (*buf == 'n') { 226 ask("Apply anyway? [n] "); 227 if (*buf != 'y') 228 skip_rest_of_patch = TRUE; 229 where = Nulline; 230 reverse = !reverse; 231 if (!pch_swap()) /* put it back to normal */ 232 fatal("lost hunk on alloc error!\n"); 233 } 234 } 235 } 236 } while (!skip_rest_of_patch && where == Nulline && 237 ++fuzz <= mymaxfuzz); 238 239 if (skip_rest_of_patch) { /* just got decided */ 240 Fclose(ofp); 241 ofp = NULL; 242 } 243 } 244 245 newwhere = pch_newfirst() + last_offset; 246 if (skip_rest_of_patch) { 247 abort_hunk(); 248 failed++; 249 if (verbose) 250 say("Hunk #%d ignored at %d.\n", hunk, newwhere); 251 } 252 else if (where == Nulline) { 253 abort_hunk(); 254 failed++; 255 if (verbose) 256 say("Hunk #%d failed at %d.\n", hunk, newwhere); 257 } 258 else { 259 apply_hunk(where); 260 if (verbose) { 261 say("Hunk #%d succeeded at %d", hunk, newwhere); 262 if (fuzz) 263 say(" with fuzz %d", fuzz); 264 if (last_offset) 265 say(" (offset %d line%s)", 266 last_offset, last_offset==1?"":"s"); 267 say(".\n"); 268 } 269 } 270 } 271 272 assert(hunk); 273 274 /* finish spewing out the new file */ 275 if (!skip_rest_of_patch) 276 spew_output(); 277 278 /* and put the output where desired */ 279 ignore_signals(); 280 if (!skip_rest_of_patch) { 281 struct stat statbuf; 282 char *realout = outname; 283 284 if (move_file(TMPOUTNAME, outname) < 0) { 285 toutkeep = TRUE; 286 realout = TMPOUTNAME; 287 chmod(TMPOUTNAME, filemode); 288 } 289 else 290 chmod(outname, filemode); 291 292 if (remove_empty_files && stat(realout, &statbuf) == 0 293 && statbuf.st_size == 0) { 294 if (verbose) 295 say("Removing %s (empty after patching).\n", realout); 296 while (unlink(realout) >= 0) ; /* while is for Eunice. */ 297 } 298 } 299 Fclose(rejfp); 300 rejfp = NULL; 301 if (failed) { 302 failtotal += failed; 303 if (outname != NULL) { 304 if (!*rejname) { 305 Strcpy(rejname, outname); 306 Strcat(rejname, REJEXT); 307 } 308 if (skip_rest_of_patch) 309 say("%d out of %d hunks ignored" 310 "--saving rejects to %s\n", 311 failed, hunk, rejname); 312 else 313 say("%d out of %d hunks failed" 314 "--saving rejects to %s\n", 315 failed, hunk, rejname); 316 if (move_file(TMPREJNAME, rejname) < 0) 317 trejkeep = TRUE; 318 } else 319 say("%d out of %d hunks ignored\n", failed, hunk); 320 } 321 set_signals(1); 322 } 323 my_exit(failtotal); 324 /* NOTREACHED */ 325 } 326 327 /* Prepare to find the next patch to do in the patch file. */ 328 329 static void 330 reinitialize_almost_everything(void) 331 { 332 re_patch(); 333 re_input(); 334 335 input_lines = 0; 336 last_frozen_line = 0; 337 338 filec = 0; 339 if (filearg[0] != NULL) { 340 free(filearg[0]); 341 filearg[0] = NULL; 342 } 343 344 if (outname != NULL) { 345 free(outname); 346 outname = NULL; 347 } 348 349 last_offset = 0; 350 351 diff_type = 0; 352 353 if (revision != NULL) { 354 free(revision); 355 revision = NULL; 356 } 357 358 reverse = reverse_flag_specified; 359 skip_rest_of_patch = FALSE; 360 361 get_some_switches(); 362 363 if (filec >= 2) 364 fatal("you may not change to a different patch file\n"); 365 } 366 367 static char * 368 nextarg(void) 369 { 370 if (!--Argc) 371 fatal("missing argument after `%s'\n", *Argv); 372 return *++Argv; 373 } 374 375 /* Module for handling of long options. */ 376 377 struct option { 378 const char *long_opt; 379 char short_opt; 380 }; 381 382 static int 383 optcmp(const void *va, const void *vb) 384 { 385 const struct option *a = va, *b = vb; 386 return strcmp (a->long_opt, b->long_opt); 387 } 388 389 /* Decode Long options beginning with "--" to their short equivalents. */ 390 391 static char 392 decode_long_option(char *opt) 393 { 394 /* 395 * This table must be sorted on the first field. We also decode 396 * unimplemented options as those will probably be dealt with 397 * later, anyhow. 398 */ 399 static struct option options[] = { 400 { "batch", 't' }, 401 { "check", 'C' }, 402 { "context", 'c' }, 403 { "debug", 'x' }, 404 { "directory", 'd' }, 405 { "ed", 'e' }, 406 { "force", 'f' }, 407 { "forward", 'N' }, 408 { "fuzz", 'F' }, 409 { "ifdef", 'D' }, 410 { "ignore-whitespace", 'l' }, 411 { "normal", 'n' }, 412 { "output", 'o' }, 413 { "patchfile", 'i' }, 414 { "prefix", 'B' }, 415 { "quiet", 's' }, 416 { "reject-file", 'r' }, 417 { "remove-empty-files", 'E' }, 418 { "reverse", 'R' }, 419 { "silent", 's' }, 420 { "skip", 'S' }, 421 { "strip", 'p' }, 422 { "suffix", 'b' }, 423 { "unified", 'u' }, 424 { "version", 'v' }, 425 { "version-control", 'V' }, 426 }; 427 struct option key, *found; 428 429 key.long_opt = opt; 430 found = bsearch(&key, options, 431 sizeof(options) / sizeof(options[0]), sizeof(options[0]), optcmp); 432 433 return found ? found->short_opt : '\0'; 434 } 435 436 /* Process switches and filenames up to next '+' or end of list. */ 437 438 static void 439 get_some_switches(void) 440 { 441 char *s; 442 443 rejname[0] = '\0'; 444 if (!Argc) 445 return; 446 for (Argc--,Argv++; Argc; Argc--,Argv++) { 447 s = Argv[0]; 448 if (strEQ(s, "+")) { 449 return; /* + will be skipped by for loop */ 450 } 451 if (*s != '-' || !s[1]) { 452 if (filec == MAXFILEC) 453 fatal("too many file arguments\n"); 454 if (filec == 1 && filearg[filec] != NULL) 455 fatal("-i option and patchfile argument are mutually\ 456 exclusive\n"); 457 filearg[filec++] = xstrdup(s); 458 } 459 else { 460 char opt; 461 462 if (*(s + 1) == '-') { 463 opt = decode_long_option(s + 2); 464 s += strlen(s) - 1; 465 } 466 else 467 opt = *++s; 468 469 switch (opt) { 470 case 'b': 471 simple_backup_suffix = xstrdup(nextarg()); 472 break; 473 case 'B': 474 origprae = xstrdup(nextarg()); 475 break; 476 case 'c': 477 diff_type = CONTEXT_DIFF; 478 break; 479 case 'd': 480 if (!*++s) 481 s = nextarg(); 482 if (chdir(s) < 0) 483 pfatal("can't cd to %s", s); 484 break; 485 case 'D': 486 do_defines = TRUE; 487 if (!*++s) 488 s = nextarg(); 489 if (!isalpha((unsigned char)*s) && '_' != *s) 490 fatal("argument to -D is not an identifier\n"); 491 Sprintf(if_defined, "#ifdef %s\n", s); 492 Sprintf(not_defined, "#ifndef %s\n", s); 493 Sprintf(end_defined, "#endif /* %s */\n", s); 494 break; 495 case 'e': 496 diff_type = ED_DIFF; 497 break; 498 case 'E': 499 remove_empty_files = TRUE; 500 break; 501 case 'f': 502 force = TRUE; 503 break; 504 case 'F': 505 if (*++s == '=') 506 s++; 507 maxfuzz = atoi(s); 508 break; 509 case 'i': 510 if (filearg[1] != NULL) 511 free(filearg[1]); 512 filearg[1] = xstrdup(nextarg()); 513 break; 514 case 'l': 515 canonicalize = TRUE; 516 break; 517 case 'n': 518 diff_type = NORMAL_DIFF; 519 break; 520 case 'N': 521 noreverse = TRUE; 522 break; 523 case 'o': 524 outname = xstrdup(nextarg()); 525 break; 526 case 'p': 527 if (*++s == '=') 528 s++; 529 strippath = atoi(s); 530 break; 531 case 'r': 532 Strcpy(rejname, nextarg()); 533 break; 534 case 'R': 535 reverse = TRUE; 536 reverse_flag_specified = TRUE; 537 break; 538 case 's': 539 verbose = FALSE; 540 break; 541 case 'S': 542 skip_rest_of_patch = TRUE; 543 break; 544 case 't': 545 batch = TRUE; 546 break; 547 case 'u': 548 diff_type = UNI_DIFF; 549 break; 550 case 'v': 551 version(); 552 break; 553 case 'V': 554 #ifndef NODIR 555 backup_type = get_version (nextarg ()); 556 #endif 557 break; 558 #ifdef DEBUGGING 559 case 'x': 560 debug = atoi(s+1); 561 break; 562 #endif 563 default: 564 fprintf(stderr, "patch: unrecognized option `%s'\n", Argv[0]); 565 fprintf(stderr, "\ 566 Usage: patch [options] [origfile [patchfile]] [+ [options] [origfile]]...\n\ 567 Options:\n\ 568 [-ceEflnNRsStuv] [-b backup-ext] [-B backup-prefix] [-d directory]\n\ 569 [-D symbol] [-Fmax-fuzz] [-o out-file] [-p[strip-count]]\n\ 570 [-r rej-name] [-V {numbered,existing,simple}]\n"); 571 my_exit(1); 572 } 573 } 574 } 575 } 576 577 /* Attempt to find the right place to apply this hunk of patch. */ 578 579 static LINENUM 580 locate_hunk(LINENUM fuzz) 581 { 582 LINENUM first_guess = pch_first() + last_offset; 583 LINENUM offset; 584 LINENUM pat_lines = pch_ptrn_lines(); 585 LINENUM max_pos_offset = input_lines - first_guess 586 - pat_lines + 1; 587 LINENUM max_neg_offset = first_guess - last_frozen_line - 1 588 + pch_context(); 589 590 if (!pat_lines) /* null range matches always */ 591 return first_guess; 592 if (max_neg_offset >= first_guess) /* do not try lines < 0 */ 593 max_neg_offset = first_guess - 1; 594 if (first_guess <= input_lines && patch_match(first_guess, Nulline, fuzz)) 595 return first_guess; 596 for (offset = 1; ; offset++) { 597 bool check_after = (offset <= max_pos_offset); 598 bool check_before = (offset <= max_neg_offset); 599 600 if (check_after && patch_match(first_guess, offset, fuzz)) { 601 #ifdef DEBUGGING 602 if (debug & 1) 603 say("Offset changing from %d to %d\n", last_offset, offset); 604 #endif 605 last_offset = offset; 606 return first_guess+offset; 607 } 608 else if (check_before && patch_match(first_guess, -offset, fuzz)) { 609 #ifdef DEBUGGING 610 if (debug & 1) 611 say("Offset changing from %d to %d\n", last_offset, -offset); 612 #endif 613 last_offset = -offset; 614 return first_guess-offset; 615 } 616 else if (!check_before && !check_after) 617 return Nulline; 618 } 619 } 620 621 /* We did not find the pattern, dump out the hunk so they can handle it. */ 622 623 static void 624 abort_hunk(void) 625 { 626 LINENUM i; 627 LINENUM pat_end = pch_end(); 628 /* add in last_offset to guess the same as the previous successful hunk */ 629 LINENUM oldfirst = pch_first() + last_offset; 630 LINENUM newfirst = pch_newfirst() + last_offset; 631 LINENUM oldlast = oldfirst + pch_ptrn_lines() - 1; 632 LINENUM newlast = newfirst + pch_repl_lines() - 1; 633 const char *stars = (diff_type >= NEW_CONTEXT_DIFF ? " ****" : ""); 634 const char *minuses = (diff_type >= NEW_CONTEXT_DIFF ? " ----" : " -----"); 635 636 fprintf(rejfp, "***************\n"); 637 for (i=0; i<=pat_end; i++) { 638 switch (pch_char(i)) { 639 case '*': 640 if (oldlast < oldfirst) 641 fprintf(rejfp, "*** 0%s\n", stars); 642 else if (oldlast == oldfirst) 643 fprintf(rejfp, "*** %d%s\n", oldfirst, stars); 644 else 645 fprintf(rejfp, "*** %d,%d%s\n", oldfirst, oldlast, stars); 646 break; 647 case '=': 648 if (newlast < newfirst) 649 fprintf(rejfp, "--- 0%s\n", minuses); 650 else if (newlast == newfirst) 651 fprintf(rejfp, "--- %d%s\n", newfirst, minuses); 652 else 653 fprintf(rejfp, "--- %d,%d%s\n", newfirst, newlast, minuses); 654 break; 655 case '\n': 656 fprintf(rejfp, "%s", pfetch(i)); 657 break; 658 case ' ': case '-': case '+': case '!': 659 fprintf(rejfp, "%c %s", pch_char(i), pfetch(i)); 660 break; 661 default: 662 fatal("fatal internal error in abort_hunk\n"); 663 } 664 } 665 } 666 667 /* We found where to apply it (we hope), so do it. */ 668 669 static void 670 apply_hunk(LINENUM where) 671 { 672 LINENUM old = 1; 673 LINENUM lastline = pch_ptrn_lines(); 674 LINENUM new = lastline+1; 675 #define OUTSIDE 0 676 #define IN_IFNDEF 1 677 #define IN_IFDEF 2 678 #define IN_ELSE 3 679 int def_state = OUTSIDE; 680 bool R_do_defines = do_defines; 681 LINENUM pat_end = pch_end(); 682 683 where--; 684 while (pch_char(new) == '=' || pch_char(new) == '\n') 685 new++; 686 687 while (old <= lastline) { 688 if (pch_char(old) == '-') { 689 copy_till(where + old - 1); 690 if (R_do_defines) { 691 if (def_state == OUTSIDE) { 692 fputs(not_defined, ofp); 693 def_state = IN_IFNDEF; 694 } 695 else if (def_state == IN_IFDEF) { 696 fputs(else_defined, ofp); 697 def_state = IN_ELSE; 698 } 699 fputs(pfetch(old), ofp); 700 } 701 last_frozen_line++; 702 old++; 703 } 704 else if (new > pat_end) { 705 break; 706 } 707 else if (pch_char(new) == '+') { 708 copy_till(where + old - 1); 709 if (R_do_defines) { 710 if (def_state == IN_IFNDEF) { 711 fputs(else_defined, ofp); 712 def_state = IN_ELSE; 713 } 714 else if (def_state == OUTSIDE) { 715 fputs(if_defined, ofp); 716 def_state = IN_IFDEF; 717 } 718 } 719 fputs(pfetch(new), ofp); 720 new++; 721 } 722 else if (pch_char(new) != pch_char(old)) { 723 say("Out-of-sync patch, lines %d,%d--mangled text or line numbers, maybe?\n", 724 pch_hunk_beg() + old, 725 pch_hunk_beg() + new); 726 #ifdef DEBUGGING 727 say("oldchar = '%c', newchar = '%c'\n", 728 pch_char(old), pch_char(new)); 729 #endif 730 my_exit(1); 731 } 732 else if (pch_char(new) == '!') { 733 copy_till(where + old - 1); 734 if (R_do_defines) { 735 fputs(not_defined, ofp); 736 def_state = IN_IFNDEF; 737 } 738 while (pch_char(old) == '!') { 739 if (R_do_defines) { 740 fputs(pfetch(old), ofp); 741 } 742 last_frozen_line++; 743 old++; 744 } 745 if (R_do_defines) { 746 fputs(else_defined, ofp); 747 def_state = IN_ELSE; 748 } 749 while (pch_char(new) == '!') { 750 fputs(pfetch(new), ofp); 751 new++; 752 } 753 } 754 else { 755 assert(pch_char(new) == ' '); 756 old++; 757 new++; 758 if (R_do_defines && def_state != OUTSIDE) { 759 fputs(end_defined, ofp); 760 def_state = OUTSIDE; 761 } 762 } 763 } 764 if (new <= pat_end && pch_char(new) == '+') { 765 copy_till(where + old - 1); 766 if (R_do_defines) { 767 if (def_state == OUTSIDE) { 768 fputs(if_defined, ofp); 769 def_state = IN_IFDEF; 770 } 771 else if (def_state == IN_IFNDEF) { 772 fputs(else_defined, ofp); 773 def_state = IN_ELSE; 774 } 775 } 776 while (new <= pat_end && pch_char(new) == '+') { 777 fputs(pfetch(new), ofp); 778 new++; 779 } 780 } 781 if (R_do_defines && def_state != OUTSIDE) { 782 fputs(end_defined, ofp); 783 } 784 } 785 786 /* Open the new file. */ 787 788 static void 789 init_output(char *name) 790 { 791 ofp = fopen(name, "w"); 792 if (ofp == NULL) 793 pfatal("can't create %s", name); 794 } 795 796 /* Open a file to put hunks we can't locate. */ 797 798 static void 799 init_reject(char *name) 800 { 801 rejfp = fopen(name, "w"); 802 if (rejfp == NULL) 803 pfatal("can't create %s", name); 804 } 805 806 /* Copy input file to output, up to wherever hunk is to be applied. */ 807 808 static void 809 copy_till(LINENUM lastline) 810 { 811 LINENUM R_last_frozen_line = last_frozen_line; 812 813 if (R_last_frozen_line > lastline) 814 fatal("misordered hunks! output would be garbled\n"); 815 while (R_last_frozen_line < lastline) { 816 dump_line(++R_last_frozen_line); 817 } 818 last_frozen_line = R_last_frozen_line; 819 } 820 821 /* Finish copying the input file to the output file. */ 822 823 static void 824 spew_output(void) 825 { 826 #ifdef DEBUGGING 827 if (debug & 256) 828 say("il=%d lfl=%d\n",input_lines,last_frozen_line); 829 #endif 830 if (input_lines) 831 copy_till(input_lines); /* dump remainder of file */ 832 Fclose(ofp); 833 ofp = NULL; 834 } 835 836 /* Copy one line from input to output. */ 837 838 static void 839 dump_line(LINENUM line) 840 { 841 const char *s; 842 char R_newline = '\n'; 843 844 /* Note: string is not null terminated. */ 845 for (s=ifetch(line); putc(*s, ofp) != R_newline; s++) ; 846 } 847 848 /* Does the patch pattern match at line base+offset? */ 849 850 static bool 851 patch_match(LINENUM base, LINENUM offset, LINENUM fuzz) 852 { 853 LINENUM pline = 1 + fuzz; 854 LINENUM iline; 855 LINENUM pat_lines = pch_ptrn_lines() - fuzz; 856 857 for (iline=base+offset+fuzz; pline <= pat_lines; pline++,iline++) { 858 if (canonicalize) { 859 if (!similar(ifetch(iline), 860 pfetch(pline), 861 pch_line_len(pline) )) 862 return FALSE; 863 } 864 else if (strnNE(ifetch(iline), 865 pfetch(pline), 866 pch_line_len(pline) )) 867 return FALSE; 868 } 869 return TRUE; 870 } 871 872 /* Do two lines match with canonicalized white space? */ 873 874 static bool 875 similar(const char *a, const char *b, size_t len) 876 { 877 while (len) { 878 if (isspace((unsigned char)*b)) {/* whitespace (or \n) to match? */ 879 if (!isspace((unsigned char)*a))/* no corresponding whitespace? */ 880 return FALSE; 881 while (len && isspace((unsigned char)*b) && *b != '\n') 882 b++,len--; /* skip pattern whitespace */ 883 while (isspace((unsigned char)*a) && *a != '\n') 884 a++; /* skip target whitespace */ 885 if (*a == '\n' || *b == '\n') 886 return (*a == *b); /* should end in sync */ 887 } 888 else if (*a++ != *b++) /* match non-whitespace chars */ 889 return FALSE; 890 else 891 len--; /* probably not necessary */ 892 } 893 return TRUE; /* actually, this is not reached */ 894 /* since there is always a \n */ 895 } 896 897 /* Exit with cleanup. */ 898 899 void 900 my_exit(int status) 901 { 902 Unlink(TMPINNAME); 903 if (!toutkeep) { 904 Unlink(TMPOUTNAME); 905 } 906 if (!trejkeep) { 907 Unlink(TMPREJNAME); 908 } 909 Unlink(TMPPATNAME); 910 exit(status); 911 } 912
Indexes created Tue Sep 23 14:10:03 GMT 2025