patch.c revision 1.19
1 /* $NetBSD: patch.c,v 1.19 2003/07/30 08:51:04 itojun 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 1.19 2003/07/30 08:51:04 itojun 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 strlcpy(TMPOUTNAME, tmpdir, tmpname_len); 100 strlcat(TMPOUTNAME, "/patchoXXXXXX", tmpname_len); 101 if ((i = mkstemp(TMPOUTNAME)) < 0) 102 pfatal("can't create %s", TMPOUTNAME); 103 Close(i); 104 105 TMPINNAME = xmalloc(tmpname_len); 106 strlcpy(TMPINNAME, tmpdir, tmpname_len); 107 strlcat(TMPINNAME, "/patchiXXXXXX", tmpname_len); 108 if ((i = mkstemp(TMPINNAME)) < 0) 109 pfatal("can't create %s", TMPINNAME); 110 Close(i); 111 112 TMPREJNAME = xmalloc(tmpname_len); 113 strlcpy(TMPREJNAME, tmpdir, tmpname_len); 114 strlcat(TMPREJNAME, "/patchrXXXXXX", tmpname_len); 115 if ((i = mkstemp(TMPREJNAME)) < 0) 116 pfatal("can't create %s", TMPREJNAME); 117 Close(i); 118 119 TMPPATNAME = xmalloc(tmpname_len); 120 strlcpy(TMPPATNAME, tmpdir, tmpname_len); 121 strlcat(TMPPATNAME, "/patchpXXXXXX", tmpname_len); 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 strlcpy(rejname, outname, sizeof(rejname)); 306 strlcat(rejname, REJEXT, sizeof(rejname)); 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 snprintf(if_defined, sizeof(if_defined), "#ifdef %s\n", s); 492 snprintf(not_defined, sizeof(not_defined), "#ifndef %s\n", s); 493 snprintf(end_defined, sizeof(end_defined), 494 "#endif /* %s */\n", s); 495 break; 496 case 'e': 497 diff_type = ED_DIFF; 498 break; 499 case 'E': 500 remove_empty_files = TRUE; 501 break; 502 case 'f': 503 force = TRUE; 504 break; 505 case 'F': 506 if (*++s == '=') 507 s++; 508 maxfuzz = atoi(s); 509 break; 510 case 'i': 511 if (filearg[1] != NULL) 512 free(filearg[1]); 513 filearg[1] = xstrdup(nextarg()); 514 break; 515 case 'l': 516 canonicalize = TRUE; 517 break; 518 case 'n': 519 diff_type = NORMAL_DIFF; 520 break; 521 case 'N': 522 noreverse = TRUE; 523 break; 524 case 'o': 525 outname = xstrdup(nextarg()); 526 break; 527 case 'p': 528 if (*++s == '=') 529 s++; 530 strippath = atoi(s); 531 break; 532 case 'r': 533 strlcpy(rejname, nextarg(), sizeof(rejname)); 534 break; 535 case 'R': 536 reverse = TRUE; 537 reverse_flag_specified = TRUE; 538 break; 539 case 's': 540 verbose = FALSE; 541 break; 542 case 'S': 543 skip_rest_of_patch = TRUE; 544 break; 545 case 't': 546 batch = TRUE; 547 break; 548 case 'u': 549 diff_type = UNI_DIFF; 550 break; 551 case 'v': 552 version(); 553 break; 554 case 'V': 555 #ifndef NODIR 556 backup_type = get_version (nextarg ()); 557 #endif 558 break; 559 #ifdef DEBUGGING 560 case 'x': 561 debug = atoi(s+1); 562 break; 563 #endif 564 default: 565 fprintf(stderr, "patch: unrecognized option `%s'\n", Argv[0]); 566 fprintf(stderr, "\ 567 Usage: patch [options] [origfile [patchfile]] [+ [options] [origfile]]...\n\ 568 Options:\n\ 569 [-ceEflnNRsStuv] [-b backup-ext] [-B backup-prefix] [-d directory]\n\ 570 [-D symbol] [-Fmax-fuzz] [-o out-file] [-p[strip-count]]\n\ 571 [-r rej-name] [-V {numbered,existing,simple}]\n"); 572 my_exit(1); 573 } 574 } 575 } 576 } 577 578 /* Attempt to find the right place to apply this hunk of patch. */ 579 580 static LINENUM 581 locate_hunk(LINENUM fuzz) 582 { 583 LINENUM first_guess = pch_first() + last_offset; 584 LINENUM offset; 585 LINENUM pat_lines = pch_ptrn_lines(); 586 LINENUM max_pos_offset = input_lines - first_guess 587 - pat_lines + 1; 588 LINENUM max_neg_offset = first_guess - last_frozen_line - 1 589 + pch_context(); 590 591 if (!pat_lines) /* null range matches always */ 592 return first_guess; 593 if (max_neg_offset >= first_guess) /* do not try lines < 0 */ 594 max_neg_offset = first_guess - 1; 595 if (first_guess <= input_lines && patch_match(first_guess, Nulline, fuzz)) 596 return first_guess; 597 for (offset = 1; ; offset++) { 598 bool check_after = (offset <= max_pos_offset); 599 bool check_before = (offset <= max_neg_offset); 600 601 if (check_after && patch_match(first_guess, offset, fuzz)) { 602 #ifdef DEBUGGING 603 if (debug & 1) 604 say("Offset changing from %d to %d\n", last_offset, offset); 605 #endif 606 last_offset = offset; 607 return first_guess+offset; 608 } 609 else if (check_before && patch_match(first_guess, -offset, fuzz)) { 610 #ifdef DEBUGGING 611 if (debug & 1) 612 say("Offset changing from %d to %d\n", last_offset, -offset); 613 #endif 614 last_offset = -offset; 615 return first_guess-offset; 616 } 617 else if (!check_before && !check_after) 618 return Nulline; 619 } 620 } 621 622 /* We did not find the pattern, dump out the hunk so they can handle it. */ 623 624 static void 625 abort_hunk(void) 626 { 627 LINENUM i; 628 LINENUM pat_end = pch_end(); 629 /* add in last_offset to guess the same as the previous successful hunk */ 630 LINENUM oldfirst = pch_first() + last_offset; 631 LINENUM newfirst = pch_newfirst() + last_offset; 632 LINENUM oldlast = oldfirst + pch_ptrn_lines() - 1; 633 LINENUM newlast = newfirst + pch_repl_lines() - 1; 634 const char *stars = (diff_type >= NEW_CONTEXT_DIFF ? " ****" : ""); 635 const char *minuses = (diff_type >= NEW_CONTEXT_DIFF ? " ----" : " -----"); 636 637 fprintf(rejfp, "***************\n"); 638 for (i=0; i<=pat_end; i++) { 639 switch (pch_char(i)) { 640 case '*': 641 if (oldlast < oldfirst) 642 fprintf(rejfp, "*** 0%s\n", stars); 643 else if (oldlast == oldfirst) 644 fprintf(rejfp, "*** %d%s\n", oldfirst, stars); 645 else 646 fprintf(rejfp, "*** %d,%d%s\n", oldfirst, oldlast, stars); 647 break; 648 case '=': 649 if (newlast < newfirst) 650 fprintf(rejfp, "--- 0%s\n", minuses); 651 else if (newlast == newfirst) 652 fprintf(rejfp, "--- %d%s\n", newfirst, minuses); 653 else 654 fprintf(rejfp, "--- %d,%d%s\n", newfirst, newlast, minuses); 655 break; 656 case '\n': 657 fprintf(rejfp, "%s", pfetch(i)); 658 break; 659 case ' ': case '-': case '+': case '!': 660 fprintf(rejfp, "%c %s", pch_char(i), pfetch(i)); 661 break; 662 default: 663 fatal("fatal internal error in abort_hunk\n"); 664 } 665 } 666 } 667 668 /* We found where to apply it (we hope), so do it. */ 669 670 static void 671 apply_hunk(LINENUM where) 672 { 673 LINENUM old = 1; 674 LINENUM lastline = pch_ptrn_lines(); 675 LINENUM new = lastline+1; 676 #define OUTSIDE 0 677 #define IN_IFNDEF 1 678 #define IN_IFDEF 2 679 #define IN_ELSE 3 680 int def_state = OUTSIDE; 681 bool R_do_defines = do_defines; 682 LINENUM pat_end = pch_end(); 683 684 where--; 685 while (pch_char(new) == '=' || pch_char(new) == '\n') 686 new++; 687 688 while (old <= lastline) { 689 if (pch_char(old) == '-') { 690 copy_till(where + old - 1); 691 if (R_do_defines) { 692 if (def_state == OUTSIDE) { 693 fputs(not_defined, ofp); 694 def_state = IN_IFNDEF; 695 } 696 else if (def_state == IN_IFDEF) { 697 fputs(else_defined, ofp); 698 def_state = IN_ELSE; 699 } 700 fputs(pfetch(old), ofp); 701 } 702 last_frozen_line++; 703 old++; 704 } 705 else if (new > pat_end) { 706 break; 707 } 708 else if (pch_char(new) == '+') { 709 copy_till(where + old - 1); 710 if (R_do_defines) { 711 if (def_state == IN_IFNDEF) { 712 fputs(else_defined, ofp); 713 def_state = IN_ELSE; 714 } 715 else if (def_state == OUTSIDE) { 716 fputs(if_defined, ofp); 717 def_state = IN_IFDEF; 718 } 719 } 720 fputs(pfetch(new), ofp); 721 new++; 722 } 723 else if (pch_char(new) != pch_char(old)) { 724 say("Out-of-sync patch, lines %d,%d--mangled text or line numbers, maybe?\n", 725 pch_hunk_beg() + old, 726 pch_hunk_beg() + new); 727 #ifdef DEBUGGING 728 say("oldchar = '%c', newchar = '%c'\n", 729 pch_char(old), pch_char(new)); 730 #endif 731 my_exit(1); 732 } 733 else if (pch_char(new) == '!') { 734 copy_till(where + old - 1); 735 if (R_do_defines) { 736 fputs(not_defined, ofp); 737 def_state = IN_IFNDEF; 738 } 739 while (pch_char(old) == '!') { 740 if (R_do_defines) { 741 fputs(pfetch(old), ofp); 742 } 743 last_frozen_line++; 744 old++; 745 } 746 if (R_do_defines) { 747 fputs(else_defined, ofp); 748 def_state = IN_ELSE; 749 } 750 while (pch_char(new) == '!') { 751 fputs(pfetch(new), ofp); 752 new++; 753 } 754 } 755 else { 756 assert(pch_char(new) == ' '); 757 old++; 758 new++; 759 if (R_do_defines && def_state != OUTSIDE) { 760 fputs(end_defined, ofp); 761 def_state = OUTSIDE; 762 } 763 } 764 } 765 if (new <= pat_end && pch_char(new) == '+') { 766 copy_till(where + old - 1); 767 if (R_do_defines) { 768 if (def_state == OUTSIDE) { 769 fputs(if_defined, ofp); 770 def_state = IN_IFDEF; 771 } 772 else if (def_state == IN_IFNDEF) { 773 fputs(else_defined, ofp); 774 def_state = IN_ELSE; 775 } 776 } 777 while (new <= pat_end && pch_char(new) == '+') { 778 fputs(pfetch(new), ofp); 779 new++; 780 } 781 } 782 if (R_do_defines && def_state != OUTSIDE) { 783 fputs(end_defined, ofp); 784 } 785 } 786 787 /* Open the new file. */ 788 789 static void 790 init_output(char *name) 791 { 792 ofp = fopen(name, "w"); 793 if (ofp == NULL) 794 pfatal("can't create %s", name); 795 } 796 797 /* Open a file to put hunks we can't locate. */ 798 799 static void 800 init_reject(char *name) 801 { 802 rejfp = fopen(name, "w"); 803 if (rejfp == NULL) 804 pfatal("can't create %s", name); 805 } 806 807 /* Copy input file to output, up to wherever hunk is to be applied. */ 808 809 static void 810 copy_till(LINENUM lastline) 811 { 812 LINENUM R_last_frozen_line = last_frozen_line; 813 814 if (R_last_frozen_line > lastline) 815 fatal("misordered hunks! output would be garbled\n"); 816 while (R_last_frozen_line < lastline) { 817 dump_line(++R_last_frozen_line); 818 } 819 last_frozen_line = R_last_frozen_line; 820 } 821 822 /* Finish copying the input file to the output file. */ 823 824 static void 825 spew_output(void) 826 { 827 #ifdef DEBUGGING 828 if (debug & 256) 829 say("il=%d lfl=%d\n",input_lines,last_frozen_line); 830 #endif 831 if (input_lines) 832 copy_till(input_lines); /* dump remainder of file */ 833 Fclose(ofp); 834 ofp = NULL; 835 } 836 837 /* Copy one line from input to output. */ 838 839 static void 840 dump_line(LINENUM line) 841 { 842 const char *s; 843 char R_newline = '\n'; 844 845 /* Note: string is not null terminated. */ 846 for (s=ifetch(line); putc(*s, ofp) != R_newline; s++) ; 847 } 848 849 /* Does the patch pattern match at line base+offset? */ 850 851 static bool 852 patch_match(LINENUM base, LINENUM offset, LINENUM fuzz) 853 { 854 LINENUM pline = 1 + fuzz; 855 LINENUM iline; 856 LINENUM pat_lines = pch_ptrn_lines() - fuzz; 857 858 for (iline=base+offset+fuzz; pline <= pat_lines; pline++,iline++) { 859 if (canonicalize) { 860 if (!similar(ifetch(iline), 861 pfetch(pline), 862 pch_line_len(pline) )) 863 return FALSE; 864 } 865 else if (strnNE(ifetch(iline), 866 pfetch(pline), 867 pch_line_len(pline) )) 868 return FALSE; 869 } 870 return TRUE; 871 } 872 873 /* Do two lines match with canonicalized white space? */ 874 875 static bool 876 similar(const char *a, const char *b, size_t len) 877 { 878 while (len) { 879 if (isspace((unsigned char)*b)) {/* whitespace (or \n) to match? */ 880 if (!isspace((unsigned char)*a))/* no corresponding whitespace? */ 881 return FALSE; 882 while (len && isspace((unsigned char)*b) && *b != '\n') 883 b++,len--; /* skip pattern whitespace */ 884 while (isspace((unsigned char)*a) && *a != '\n') 885 a++; /* skip target whitespace */ 886 if (*a == '\n' || *b == '\n') 887 return (*a == *b); /* should end in sync */ 888 } 889 else if (*a++ != *b++) /* match non-whitespace chars */ 890 return FALSE; 891 else 892 len--; /* probably not necessary */ 893 } 894 return TRUE; /* actually, this is not reached */ 895 /* since there is always a \n */ 896 } 897 898 /* Exit with cleanup. */ 899 900 void 901 my_exit(int status) 902 { 903 Unlink(TMPINNAME); 904 if (!toutkeep) { 905 Unlink(TMPOUTNAME); 906 } 907 if (!trejkeep) { 908 Unlink(TMPREJNAME); 909 } 910 Unlink(TMPPATNAME); 911 exit(status); 912 } 913
Indexes created Tue Sep 23 14:10:03 GMT 2025