patch.c revision 1.16
1 /* $NetBSD: patch.c,v 1.16 2003/05/30 22:33:58 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 1.16 2003/05/30 22:33:58 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(char *, char *, int); 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 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 } 325 326 /* Prepare to find the next patch to do in the patch file. */ 327 328 static void 329 reinitialize_almost_everything(void) 330 { 331 re_patch(); 332 re_input(); 333 334 input_lines = 0; 335 last_frozen_line = 0; 336 337 filec = 0; 338 if (filearg[0] != NULL) { 339 free(filearg[0]); 340 filearg[0] = NULL; 341 } 342 343 if (outname != NULL) { 344 free(outname); 345 outname = NULL; 346 } 347 348 last_offset = 0; 349 350 diff_type = 0; 351 352 if (revision != NULL) { 353 free(revision); 354 revision = NULL; 355 } 356 357 reverse = reverse_flag_specified; 358 skip_rest_of_patch = FALSE; 359 360 get_some_switches(); 361 362 if (filec >= 2) 363 fatal("you may not change to a different patch file\n"); 364 } 365 366 static char * 367 nextarg(void) 368 { 369 if (!--Argc) 370 fatal("missing argument after `%s'\n", *Argv); 371 return *++Argv; 372 } 373 374 /* Module for handling of long options. */ 375 376 struct option { 377 char *long_opt; 378 char short_opt; 379 }; 380 381 static int 382 optcmp(const void *va, const void *vb) 383 { 384 const struct option *a = va, *b = vb; 385 return strcmp (a->long_opt, b->long_opt); 386 } 387 388 /* Decode Long options beginning with "--" to their short equivalents. */ 389 390 static char 391 decode_long_option(char *opt) 392 { 393 /* 394 * This table must be sorted on the first field. We also decode 395 * unimplemented options as those will probably be dealt with 396 * later, anyhow. 397 */ 398 static struct option options[] = { 399 { "batch", 't' }, 400 { "check", 'C' }, 401 { "context", 'c' }, 402 { "debug", 'x' }, 403 { "directory", 'd' }, 404 { "ed", 'e' }, 405 { "force", 'f' }, 406 { "forward", 'N' }, 407 { "fuzz", 'F' }, 408 { "ifdef", 'D' }, 409 { "ignore-whitespace", 'l' }, 410 { "normal", 'n' }, 411 { "output", 'o' }, 412 { "patchfile", 'i' }, 413 { "prefix", 'B' }, 414 { "quiet", 's' }, 415 { "reject-file", 'r' }, 416 { "remove-empty-files", 'E' }, 417 { "reverse", 'R' }, 418 { "silent", 's' }, 419 { "skip", 'S' }, 420 { "strip", 'p' }, 421 { "suffix", 'b' }, 422 { "unified", 'u' }, 423 { "version", 'v' }, 424 { "version-control", 'V' }, 425 }; 426 struct option key, *found; 427 428 key.long_opt = opt; 429 found = bsearch(&key, options, 430 sizeof(options) / sizeof(options[0]), sizeof(options[0]), optcmp); 431 432 return found ? found->short_opt : '\0'; 433 } 434 435 /* Process switches and filenames up to next '+' or end of list. */ 436 437 static void 438 get_some_switches(void) 439 { 440 char *s; 441 442 rejname[0] = '\0'; 443 if (!Argc) 444 return; 445 for (Argc--,Argv++; Argc; Argc--,Argv++) { 446 s = Argv[0]; 447 if (strEQ(s, "+")) { 448 return; /* + will be skipped by for loop */ 449 } 450 if (*s != '-' || !s[1]) { 451 if (filec == MAXFILEC) 452 fatal("too many file arguments\n"); 453 if (filec == 1 && filearg[filec] != NULL) 454 fatal("-i option and patchfile argument are mutually\ 455 exclusive\n"); 456 filearg[filec++] = xstrdup(s); 457 } 458 else { 459 char opt; 460 461 if (*(s + 1) == '-') { 462 opt = decode_long_option(s + 2); 463 s += strlen(s) - 1; 464 } 465 else 466 opt = *++s; 467 468 switch (opt) { 469 case 'b': 470 simple_backup_suffix = xstrdup(nextarg()); 471 break; 472 case 'B': 473 origprae = xstrdup(nextarg()); 474 break; 475 case 'c': 476 diff_type = CONTEXT_DIFF; 477 break; 478 case 'd': 479 if (!*++s) 480 s = nextarg(); 481 if (chdir(s) < 0) 482 pfatal("can't cd to %s", s); 483 break; 484 case 'D': 485 do_defines = TRUE; 486 if (!*++s) 487 s = nextarg(); 488 if (!isalpha((unsigned char)*s) && '_' != *s) 489 fatal("argument to -D is not an identifier\n"); 490 Sprintf(if_defined, "#ifdef %s\n", s); 491 Sprintf(not_defined, "#ifndef %s\n", s); 492 Sprintf(end_defined, "#endif /* %s */\n", s); 493 break; 494 case 'e': 495 diff_type = ED_DIFF; 496 break; 497 case 'E': 498 remove_empty_files = TRUE; 499 break; 500 case 'f': 501 force = TRUE; 502 break; 503 case 'F': 504 if (*++s == '=') 505 s++; 506 maxfuzz = atoi(s); 507 break; 508 case 'i': 509 if (filearg[1] != NULL) 510 free(filearg[1]); 511 filearg[1] = xstrdup(nextarg()); 512 break; 513 case 'l': 514 canonicalize = TRUE; 515 break; 516 case 'n': 517 diff_type = NORMAL_DIFF; 518 break; 519 case 'N': 520 noreverse = TRUE; 521 break; 522 case 'o': 523 outname = xstrdup(nextarg()); 524 break; 525 case 'p': 526 if (*++s == '=') 527 s++; 528 strippath = atoi(s); 529 break; 530 case 'r': 531 Strcpy(rejname, nextarg()); 532 break; 533 case 'R': 534 reverse = TRUE; 535 reverse_flag_specified = TRUE; 536 break; 537 case 's': 538 verbose = FALSE; 539 break; 540 case 'S': 541 skip_rest_of_patch = TRUE; 542 break; 543 case 't': 544 batch = TRUE; 545 break; 546 case 'u': 547 diff_type = UNI_DIFF; 548 break; 549 case 'v': 550 version(); 551 break; 552 case 'V': 553 #ifndef NODIR 554 backup_type = get_version (nextarg ()); 555 #endif 556 break; 557 #ifdef DEBUGGING 558 case 'x': 559 debug = atoi(s+1); 560 break; 561 #endif 562 default: 563 fprintf(stderr, "patch: unrecognized option `%s'\n", Argv[0]); 564 fprintf(stderr, "\ 565 Usage: patch [options] [origfile [patchfile]] [+ [options] [origfile]]...\n\ 566 Options:\n\ 567 [-ceEflnNRsStuv] [-b backup-ext] [-B backup-prefix] [-d directory]\n\ 568 [-D symbol] [-Fmax-fuzz] [-o out-file] [-p[strip-count]]\n\ 569 [-r rej-name] [-V {numbered,existing,simple}]\n"); 570 my_exit(1); 571 } 572 } 573 } 574 } 575 576 /* Attempt to find the right place to apply this hunk of patch. */ 577 578 static LINENUM 579 locate_hunk(LINENUM fuzz) 580 { 581 LINENUM first_guess = pch_first() + last_offset; 582 LINENUM offset; 583 LINENUM pat_lines = pch_ptrn_lines(); 584 LINENUM max_pos_offset = input_lines - first_guess 585 - pat_lines + 1; 586 LINENUM max_neg_offset = first_guess - last_frozen_line - 1 587 + pch_context(); 588 589 if (!pat_lines) /* null range matches always */ 590 return first_guess; 591 if (max_neg_offset >= first_guess) /* do not try lines < 0 */ 592 max_neg_offset = first_guess - 1; 593 if (first_guess <= input_lines && patch_match(first_guess, Nulline, fuzz)) 594 return first_guess; 595 for (offset = 1; ; offset++) { 596 bool check_after = (offset <= max_pos_offset); 597 bool check_before = (offset <= max_neg_offset); 598 599 if (check_after && patch_match(first_guess, offset, fuzz)) { 600 #ifdef DEBUGGING 601 if (debug & 1) 602 say("Offset changing from %d to %d\n", last_offset, offset); 603 #endif 604 last_offset = offset; 605 return first_guess+offset; 606 } 607 else if (check_before && patch_match(first_guess, -offset, fuzz)) { 608 #ifdef DEBUGGING 609 if (debug & 1) 610 say("Offset changing from %d to %d\n", last_offset, -offset); 611 #endif 612 last_offset = -offset; 613 return first_guess-offset; 614 } 615 else if (!check_before && !check_after) 616 return Nulline; 617 } 618 } 619 620 /* We did not find the pattern, dump out the hunk so they can handle it. */ 621 622 static void 623 abort_hunk(void) 624 { 625 LINENUM i; 626 LINENUM pat_end = pch_end(); 627 /* add in last_offset to guess the same as the previous successful hunk */ 628 LINENUM oldfirst = pch_first() + last_offset; 629 LINENUM newfirst = pch_newfirst() + last_offset; 630 LINENUM oldlast = oldfirst + pch_ptrn_lines() - 1; 631 LINENUM newlast = newfirst + pch_repl_lines() - 1; 632 char *stars = (diff_type >= NEW_CONTEXT_DIFF ? " ****" : ""); 633 char *minuses = (diff_type >= NEW_CONTEXT_DIFF ? " ----" : " -----"); 634 635 fprintf(rejfp, "***************\n"); 636 for (i=0; i<=pat_end; i++) { 637 switch (pch_char(i)) { 638 case '*': 639 if (oldlast < oldfirst) 640 fprintf(rejfp, "*** 0%s\n", stars); 641 else if (oldlast == oldfirst) 642 fprintf(rejfp, "*** %d%s\n", oldfirst, stars); 643 else 644 fprintf(rejfp, "*** %d,%d%s\n", oldfirst, oldlast, stars); 645 break; 646 case '=': 647 if (newlast < newfirst) 648 fprintf(rejfp, "--- 0%s\n", minuses); 649 else if (newlast == newfirst) 650 fprintf(rejfp, "--- %d%s\n", newfirst, minuses); 651 else 652 fprintf(rejfp, "--- %d,%d%s\n", newfirst, newlast, minuses); 653 break; 654 case '\n': 655 fprintf(rejfp, "%s", pfetch(i)); 656 break; 657 case ' ': case '-': case '+': case '!': 658 fprintf(rejfp, "%c %s", pch_char(i), pfetch(i)); 659 break; 660 default: 661 fatal("fatal internal error in abort_hunk\n"); 662 } 663 } 664 } 665 666 /* We found where to apply it (we hope), so do it. */ 667 668 static void 669 apply_hunk(LINENUM where) 670 { 671 LINENUM old = 1; 672 LINENUM lastline = pch_ptrn_lines(); 673 LINENUM new = lastline+1; 674 #define OUTSIDE 0 675 #define IN_IFNDEF 1 676 #define IN_IFDEF 2 677 #define IN_ELSE 3 678 int def_state = OUTSIDE; 679 bool R_do_defines = do_defines; 680 LINENUM pat_end = pch_end(); 681 682 where--; 683 while (pch_char(new) == '=' || pch_char(new) == '\n') 684 new++; 685 686 while (old <= lastline) { 687 if (pch_char(old) == '-') { 688 copy_till(where + old - 1); 689 if (R_do_defines) { 690 if (def_state == OUTSIDE) { 691 fputs(not_defined, ofp); 692 def_state = IN_IFNDEF; 693 } 694 else if (def_state == IN_IFDEF) { 695 fputs(else_defined, ofp); 696 def_state = IN_ELSE; 697 } 698 fputs(pfetch(old), ofp); 699 } 700 last_frozen_line++; 701 old++; 702 } 703 else if (new > pat_end) { 704 break; 705 } 706 else if (pch_char(new) == '+') { 707 copy_till(where + old - 1); 708 if (R_do_defines) { 709 if (def_state == IN_IFNDEF) { 710 fputs(else_defined, ofp); 711 def_state = IN_ELSE; 712 } 713 else if (def_state == OUTSIDE) { 714 fputs(if_defined, ofp); 715 def_state = IN_IFDEF; 716 } 717 } 718 fputs(pfetch(new), ofp); 719 new++; 720 } 721 else if (pch_char(new) != pch_char(old)) { 722 say("Out-of-sync patch, lines %d,%d--mangled text or line numbers, maybe?\n", 723 pch_hunk_beg() + old, 724 pch_hunk_beg() + new); 725 #ifdef DEBUGGING 726 say("oldchar = '%c', newchar = '%c'\n", 727 pch_char(old), pch_char(new)); 728 #endif 729 my_exit(1); 730 } 731 else if (pch_char(new) == '!') { 732 copy_till(where + old - 1); 733 if (R_do_defines) { 734 fputs(not_defined, ofp); 735 def_state = IN_IFNDEF; 736 } 737 while (pch_char(old) == '!') { 738 if (R_do_defines) { 739 fputs(pfetch(old), ofp); 740 } 741 last_frozen_line++; 742 old++; 743 } 744 if (R_do_defines) { 745 fputs(else_defined, ofp); 746 def_state = IN_ELSE; 747 } 748 while (pch_char(new) == '!') { 749 fputs(pfetch(new), ofp); 750 new++; 751 } 752 } 753 else { 754 assert(pch_char(new) == ' '); 755 old++; 756 new++; 757 if (R_do_defines && def_state != OUTSIDE) { 758 fputs(end_defined, ofp); 759 def_state = OUTSIDE; 760 } 761 } 762 } 763 if (new <= pat_end && pch_char(new) == '+') { 764 copy_till(where + old - 1); 765 if (R_do_defines) { 766 if (def_state == OUTSIDE) { 767 fputs(if_defined, ofp); 768 def_state = IN_IFDEF; 769 } 770 else if (def_state == IN_IFNDEF) { 771 fputs(else_defined, ofp); 772 def_state = IN_ELSE; 773 } 774 } 775 while (new <= pat_end && pch_char(new) == '+') { 776 fputs(pfetch(new), ofp); 777 new++; 778 } 779 } 780 if (R_do_defines && def_state != OUTSIDE) { 781 fputs(end_defined, ofp); 782 } 783 } 784 785 /* Open the new file. */ 786 787 static void 788 init_output(char *name) 789 { 790 ofp = fopen(name, "w"); 791 if (ofp == NULL) 792 pfatal("can't create %s", name); 793 } 794 795 /* Open a file to put hunks we can't locate. */ 796 797 static void 798 init_reject(char *name) 799 { 800 rejfp = fopen(name, "w"); 801 if (rejfp == NULL) 802 pfatal("can't create %s", name); 803 } 804 805 /* Copy input file to output, up to wherever hunk is to be applied. */ 806 807 static void 808 copy_till(LINENUM lastline) 809 { 810 LINENUM R_last_frozen_line = last_frozen_line; 811 812 if (R_last_frozen_line > lastline) 813 fatal("misordered hunks! output would be garbled\n"); 814 while (R_last_frozen_line < lastline) { 815 dump_line(++R_last_frozen_line); 816 } 817 last_frozen_line = R_last_frozen_line; 818 } 819 820 /* Finish copying the input file to the output file. */ 821 822 static void 823 spew_output(void) 824 { 825 #ifdef DEBUGGING 826 if (debug & 256) 827 say("il=%d lfl=%d\n",input_lines,last_frozen_line); 828 #endif 829 if (input_lines) 830 copy_till(input_lines); /* dump remainder of file */ 831 Fclose(ofp); 832 ofp = NULL; 833 } 834 835 /* Copy one line from input to output. */ 836 837 static void 838 dump_line(LINENUM line) 839 { 840 char *s; 841 char R_newline = '\n'; 842 843 /* Note: string is not null terminated. */ 844 for (s=ifetch(line); putc(*s, ofp) != R_newline; s++) ; 845 } 846 847 /* Does the patch pattern match at line base+offset? */ 848 849 static bool 850 patch_match(LINENUM base, LINENUM offset, LINENUM fuzz) 851 { 852 LINENUM pline = 1 + fuzz; 853 LINENUM iline; 854 LINENUM pat_lines = pch_ptrn_lines() - fuzz; 855 856 for (iline=base+offset+fuzz; pline <= pat_lines; pline++,iline++) { 857 if (canonicalize) { 858 if (!similar(ifetch(iline), 859 pfetch(pline), 860 pch_line_len(pline) )) 861 return FALSE; 862 } 863 else if (strnNE(ifetch(iline), 864 pfetch(pline), 865 pch_line_len(pline) )) 866 return FALSE; 867 } 868 return TRUE; 869 } 870 871 /* Do two lines match with canonicalized white space? */ 872 873 static bool 874 similar(char *a, char *b, int len) 875 { 876 while (len) { 877 if (isspace((unsigned char)*b)) {/* whitespace (or \n) to match? */ 878 if (!isspace((unsigned char)*a))/* no corresponding whitespace? */ 879 return FALSE; 880 while (len && isspace((unsigned char)*b) && *b != '\n') 881 b++,len--; /* skip pattern whitespace */ 882 while (isspace((unsigned char)*a) && *a != '\n') 883 a++; /* skip target whitespace */ 884 if (*a == '\n' || *b == '\n') 885 return (*a == *b); /* should end in sync */ 886 } 887 else if (*a++ != *b++) /* match non-whitespace chars */ 888 return FALSE; 889 else 890 len--; /* probably not necessary */ 891 } 892 return TRUE; /* actually, this is not reached */ 893 /* since there is always a \n */ 894 } 895 896 /* Exit with cleanup. */ 897 898 void 899 my_exit(int status) 900 { 901 Unlink(TMPINNAME); 902 if (!toutkeep) { 903 Unlink(TMPOUTNAME); 904 } 905 if (!trejkeep) { 906 Unlink(TMPREJNAME); 907 } 908 Unlink(TMPPATNAME); 909 exit(status); 910 } 911
Indexes created Wed Sep 24 05:09:52 GMT 2025