1 /* $NetBSD: patch.c,v 1.13 2003/01/19 00:50:28 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 1.13 2003/01/19 00:50:28 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 out_of_mem = FALSE; 182 while (another_hunk()) { 183 hunk++; 184 fuzz = Nulline; 185 mymaxfuzz = pch_context(); 186 if (maxfuzz < mymaxfuzz) 187 mymaxfuzz = maxfuzz; 188 if (!skip_rest_of_patch) { 189 do { 190 where = locate_hunk(fuzz); 191 if (hunk == 1 && where == Nulline && !force) { 192 /* dwim for reversed patch? */ 193 if (!pch_swap()) { 194 if (fuzz == Nulline) 195 say( 196 "Not enough memory to try swapped hunk! Assuming unswapped.\n"); 197 continue; 198 } 199 reverse = !reverse; 200 where = locate_hunk(fuzz); /* try again */ 201 if (where == Nulline) { /* didn't find it swapped */ 202 if (!pch_swap()) /* put it back to normal */ 203 fatal("lost hunk on alloc error!\n"); 204 reverse = !reverse; 205 } 206 else if (noreverse) { 207 if (!pch_swap()) /* put it back to normal */ 208 fatal("lost hunk on alloc error!\n"); 209 reverse = !reverse; 210 say( 211 "Ignoring previously applied (or reversed) patch.\n"); 212 skip_rest_of_patch = TRUE; 213 } 214 else if (batch) { 215 if (verbose) 216 say( 217 "%seversed (or previously applied) patch detected! %s -R.", 218 reverse ? "R" : "Unr", 219 reverse ? "Assuming" : "Ignoring"); 220 } 221 else { 222 ask( 223 "%seversed (or previously applied) patch detected! %s -R? [y] ", 224 reverse ? "R" : "Unr", 225 reverse ? "Assume" : "Ignore"); 226 if (*buf == 'n') { 227 ask("Apply anyway? [n] "); 228 if (*buf != 'y') 229 skip_rest_of_patch = TRUE; 230 where = Nulline; 231 reverse = !reverse; 232 if (!pch_swap()) /* put it back to normal */ 233 fatal("lost hunk on alloc error!\n"); 234 } 235 } 236 } 237 } while (!skip_rest_of_patch && where == Nulline && 238 ++fuzz <= mymaxfuzz); 239 240 if (skip_rest_of_patch) { /* just got decided */ 241 Fclose(ofp); 242 ofp = NULL; 243 } 244 } 245 246 newwhere = pch_newfirst() + last_offset; 247 if (skip_rest_of_patch) { 248 abort_hunk(); 249 failed++; 250 if (verbose) 251 say("Hunk #%d ignored at %ld.\n", hunk, newwhere); 252 } 253 else if (where == Nulline) { 254 abort_hunk(); 255 failed++; 256 if (verbose) 257 say("Hunk #%d failed at %ld.\n", hunk, newwhere); 258 } 259 else { 260 apply_hunk(where); 261 if (verbose) { 262 say("Hunk #%d succeeded at %ld", hunk, newwhere); 263 if (fuzz) 264 say(" with fuzz %ld", fuzz); 265 if (last_offset) 266 say(" (offset %ld line%s)", 267 last_offset, last_offset==1L?"":"s"); 268 say(".\n"); 269 } 270 } 271 } 272 273 if (out_of_mem && using_plan_a) { 274 Argc = Argc_last; 275 Argv = Argv_last; 276 say("\n\nRan out of memory using Plan A--trying again...\n\n"); 277 if (ofp) 278 Fclose(ofp); 279 ofp = NULL; 280 if (rejfp) 281 Fclose(rejfp); 282 rejfp = NULL; 283 continue; 284 } 285 286 assert(hunk); 287 288 /* finish spewing out the new file */ 289 if (!skip_rest_of_patch) 290 spew_output(); 291 292 /* and put the output where desired */ 293 ignore_signals(); 294 if (!skip_rest_of_patch) { 295 struct stat statbuf; 296 char *realout = outname; 297 298 if (move_file(TMPOUTNAME, outname) < 0) { 299 toutkeep = TRUE; 300 realout = TMPOUTNAME; 301 chmod(TMPOUTNAME, filemode); 302 } 303 else 304 chmod(outname, filemode); 305 306 if (remove_empty_files && stat(realout, &statbuf) == 0 307 && statbuf.st_size == 0) { 308 if (verbose) 309 say("Removing %s (empty after patching).\n", realout); 310 while (unlink(realout) >= 0) ; /* while is for Eunice. */ 311 } 312 } 313 Fclose(rejfp); 314 rejfp = NULL; 315 if (failed) { 316 failtotal += failed; 317 if (outname != NULL) { 318 if (!*rejname) { 319 Strcpy(rejname, outname); 320 Strcat(rejname, REJEXT); 321 } 322 if (skip_rest_of_patch) 323 say("%d out of %d hunks ignored" 324 "--saving rejects to %s\n", 325 failed, hunk, rejname); 326 else 327 say("%d out of %d hunks failed" 328 "--saving rejects to %s\n", 329 failed, hunk, rejname); 330 if (move_file(TMPREJNAME, rejname) < 0) 331 trejkeep = TRUE; 332 } else 333 say("%d out of %d hunks ignored\n", failed, hunk); 334 } 335 set_signals(1); 336 } 337 my_exit(failtotal); 338 } 339 340 /* Prepare to find the next patch to do in the patch file. */ 341 342 static void 343 reinitialize_almost_everything(void) 344 { 345 re_patch(); 346 re_input(); 347 348 input_lines = 0; 349 last_frozen_line = 0; 350 351 filec = 0; 352 if (filearg[0] != NULL && !out_of_mem) { 353 free(filearg[0]); 354 filearg[0] = NULL; 355 } 356 357 if (outname != NULL) { 358 free(outname); 359 outname = NULL; 360 } 361 362 last_offset = 0; 363 364 diff_type = 0; 365 366 if (revision != NULL) { 367 free(revision); 368 revision = NULL; 369 } 370 371 reverse = reverse_flag_specified; 372 skip_rest_of_patch = FALSE; 373 374 get_some_switches(); 375 376 if (filec >= 2) 377 fatal("you may not change to a different patch file\n"); 378 } 379 380 static char * 381 nextarg(void) 382 { 383 if (!--Argc) 384 fatal("missing argument after `%s'\n", *Argv); 385 return *++Argv; 386 } 387 388 /* Module for handling of long options. */ 389 390 struct option { 391 char *long_opt; 392 char short_opt; 393 }; 394 395 static int 396 optcmp(const void *va, const void *vb) 397 { 398 const struct option *a = va, *b = vb; 399 return strcmp (a->long_opt, b->long_opt); 400 } 401 402 /* Decode Long options beginning with "--" to their short equivalents. */ 403 404 static char 405 decode_long_option(char *opt) 406 { 407 /* 408 * This table must be sorted on the first field. We also decode 409 * unimplemented options as those will probably be dealt with 410 * later, anyhow. 411 */ 412 static struct option options[] = { 413 { "batch", 't' }, 414 { "check", 'C' }, 415 { "context", 'c' }, 416 { "debug", 'x' }, 417 { "directory", 'd' }, 418 { "ed", 'e' }, 419 { "force", 'f' }, 420 { "forward", 'N' }, 421 { "fuzz", 'F' }, 422 { "ifdef", 'D' }, 423 { "ignore-whitespace", 'l' }, 424 { "normal", 'n' }, 425 { "output", 'o' }, 426 { "patchfile", 'i' }, 427 { "prefix", 'B' }, 428 { "quiet", 's' }, 429 { "reject-file", 'r' }, 430 { "remove-empty-files", 'E' }, 431 { "reverse", 'R' }, 432 { "silent", 's' }, 433 { "skip", 'S' }, 434 { "strip", 'p' }, 435 { "suffix", 'b' }, 436 { "unified", 'u' }, 437 { "version", 'v' }, 438 { "version-control", 'V' }, 439 }; 440 struct option key, *found; 441 442 key.long_opt = opt; 443 found = bsearch(&key, options, 444 sizeof(options) / sizeof(options[0]), sizeof(options[0]), optcmp); 445 446 return found ? found->short_opt : '\0'; 447 } 448 449 /* Process switches and filenames up to next '+' or end of list. */ 450 451 static void 452 get_some_switches(void) 453 { 454 char *s; 455 456 rejname[0] = '\0'; 457 Argc_last = Argc; 458 Argv_last = Argv; 459 if (!Argc) 460 return; 461 for (Argc--,Argv++; Argc; Argc--,Argv++) { 462 s = Argv[0]; 463 if (strEQ(s, "+")) { 464 return; /* + will be skipped by for loop */ 465 } 466 if (*s != '-' || !s[1]) { 467 if (filec == MAXFILEC) 468 fatal("too many file arguments\n"); 469 if (filec == 1 && filearg[filec] != NULL) 470 fatal("-i option and patchfile argument are mutually\ 471 exclusive\n"); 472 filearg[filec++] = xstrdup(s); 473 } 474 else { 475 char opt; 476 477 if (*(s + 1) == '-') { 478 opt = decode_long_option(s + 2); 479 s += strlen(s) - 1; 480 } 481 else 482 opt = *++s; 483 484 switch (opt) { 485 case 'b': 486 simple_backup_suffix = xstrdup(nextarg()); 487 break; 488 case 'B': 489 origprae = xstrdup(nextarg()); 490 break; 491 case 'c': 492 diff_type = CONTEXT_DIFF; 493 break; 494 case 'd': 495 if (!*++s) 496 s = nextarg(); 497 if (chdir(s) < 0) 498 pfatal("can't cd to %s", s); 499 break; 500 case 'D': 501 do_defines = TRUE; 502 if (!*++s) 503 s = nextarg(); 504 if (!isalpha((unsigned char)*s) && '_' != *s) 505 fatal("argument to -D is not an identifier\n"); 506 Sprintf(if_defined, "#ifdef %s\n", s); 507 Sprintf(not_defined, "#ifndef %s\n", s); 508 Sprintf(end_defined, "#endif /* %s */\n", s); 509 break; 510 case 'e': 511 diff_type = ED_DIFF; 512 break; 513 case 'E': 514 remove_empty_files = TRUE; 515 break; 516 case 'f': 517 force = TRUE; 518 break; 519 case 'F': 520 if (*++s == '=') 521 s++; 522 maxfuzz = atoi(s); 523 break; 524 case 'i': 525 if (filearg[1] != NULL) 526 free(filearg[1]); 527 filearg[1] = xstrdup(nextarg()); 528 break; 529 case 'l': 530 canonicalize = TRUE; 531 break; 532 case 'n': 533 diff_type = NORMAL_DIFF; 534 break; 535 case 'N': 536 noreverse = TRUE; 537 break; 538 case 'o': 539 outname = xstrdup(nextarg()); 540 break; 541 case 'p': 542 if (*++s == '=') 543 s++; 544 strippath = atoi(s); 545 break; 546 case 'r': 547 Strcpy(rejname, nextarg()); 548 break; 549 case 'R': 550 reverse = TRUE; 551 reverse_flag_specified = TRUE; 552 break; 553 case 's': 554 verbose = FALSE; 555 break; 556 case 'S': 557 skip_rest_of_patch = TRUE; 558 break; 559 case 't': 560 batch = TRUE; 561 break; 562 case 'u': 563 diff_type = UNI_DIFF; 564 break; 565 case 'v': 566 version(); 567 break; 568 case 'V': 569 #ifndef NODIR 570 backup_type = get_version (nextarg ()); 571 #endif 572 break; 573 #ifdef DEBUGGING 574 case 'x': 575 debug = atoi(s+1); 576 break; 577 #endif 578 default: 579 fprintf(stderr, "patch: unrecognized option `%s'\n", Argv[0]); 580 fprintf(stderr, "\ 581 Usage: patch [options] [origfile [patchfile]] [+ [options] [origfile]]...\n\ 582 Options:\n\ 583 [-ceEflnNRsStuv] [-b backup-ext] [-B backup-prefix] [-d directory]\n\ 584 [-D symbol] [-Fmax-fuzz] [-o out-file] [-p[strip-count]]\n\ 585 [-r rej-name] [-V {numbered,existing,simple}]\n"); 586 my_exit(1); 587 } 588 } 589 } 590 } 591 592 /* Attempt to find the right place to apply this hunk of patch. */ 593 594 static LINENUM 595 locate_hunk(LINENUM fuzz) 596 { 597 LINENUM first_guess = pch_first() + last_offset; 598 LINENUM offset; 599 LINENUM pat_lines = pch_ptrn_lines(); 600 LINENUM max_pos_offset = input_lines - first_guess 601 - pat_lines + 1; 602 LINENUM max_neg_offset = first_guess - last_frozen_line - 1 603 + pch_context(); 604 605 if (!pat_lines) /* null range matches always */ 606 return first_guess; 607 if (max_neg_offset >= first_guess) /* do not try lines < 0 */ 608 max_neg_offset = first_guess - 1; 609 if (first_guess <= input_lines && patch_match(first_guess, Nulline, fuzz)) 610 return first_guess; 611 for (offset = 1; ; offset++) { 612 bool check_after = (offset <= max_pos_offset); 613 bool check_before = (offset <= max_neg_offset); 614 615 if (check_after && patch_match(first_guess, offset, fuzz)) { 616 #ifdef DEBUGGING 617 if (debug & 1) 618 say("Offset changing from %ld to %ld\n", last_offset, offset); 619 #endif 620 last_offset = offset; 621 return first_guess+offset; 622 } 623 else if (check_before && patch_match(first_guess, -offset, fuzz)) { 624 #ifdef DEBUGGING 625 if (debug & 1) 626 say("Offset changing from %ld to %ld\n", last_offset, -offset); 627 #endif 628 last_offset = -offset; 629 return first_guess-offset; 630 } 631 else if (!check_before && !check_after) 632 return Nulline; 633 } 634 } 635 636 /* We did not find the pattern, dump out the hunk so they can handle it. */ 637 638 static void 639 abort_hunk(void) 640 { 641 LINENUM i; 642 LINENUM pat_end = pch_end(); 643 /* add in last_offset to guess the same as the previous successful hunk */ 644 LINENUM oldfirst = pch_first() + last_offset; 645 LINENUM newfirst = pch_newfirst() + last_offset; 646 LINENUM oldlast = oldfirst + pch_ptrn_lines() - 1; 647 LINENUM newlast = newfirst + pch_repl_lines() - 1; 648 char *stars = (diff_type >= NEW_CONTEXT_DIFF ? " ****" : ""); 649 char *minuses = (diff_type >= NEW_CONTEXT_DIFF ? " ----" : " -----"); 650 651 fprintf(rejfp, "***************\n"); 652 for (i=0; i<=pat_end; i++) { 653 switch (pch_char(i)) { 654 case '*': 655 if (oldlast < oldfirst) 656 fprintf(rejfp, "*** 0%s\n", stars); 657 else if (oldlast == oldfirst) 658 fprintf(rejfp, "*** %ld%s\n", oldfirst, stars); 659 else 660 fprintf(rejfp, "*** %ld,%ld%s\n", oldfirst, oldlast, stars); 661 break; 662 case '=': 663 if (newlast < newfirst) 664 fprintf(rejfp, "--- 0%s\n", minuses); 665 else if (newlast == newfirst) 666 fprintf(rejfp, "--- %ld%s\n", newfirst, minuses); 667 else 668 fprintf(rejfp, "--- %ld,%ld%s\n", newfirst, newlast, minuses); 669 break; 670 case '\n': 671 fprintf(rejfp, "%s", pfetch(i)); 672 break; 673 case ' ': case '-': case '+': case '!': 674 fprintf(rejfp, "%c %s", pch_char(i), pfetch(i)); 675 break; 676 default: 677 fatal("fatal internal error in abort_hunk\n"); 678 } 679 } 680 } 681 682 /* We found where to apply it (we hope), so do it. */ 683 684 static void 685 apply_hunk(LINENUM where) 686 { 687 LINENUM old = 1; 688 LINENUM lastline = pch_ptrn_lines(); 689 LINENUM new = lastline+1; 690 #define OUTSIDE 0 691 #define IN_IFNDEF 1 692 #define IN_IFDEF 2 693 #define IN_ELSE 3 694 int def_state = OUTSIDE; 695 bool R_do_defines = do_defines; 696 LINENUM pat_end = pch_end(); 697 698 where--; 699 while (pch_char(new) == '=' || pch_char(new) == '\n') 700 new++; 701 702 while (old <= lastline) { 703 if (pch_char(old) == '-') { 704 copy_till(where + old - 1); 705 if (R_do_defines) { 706 if (def_state == OUTSIDE) { 707 fputs(not_defined, ofp); 708 def_state = IN_IFNDEF; 709 } 710 else if (def_state == IN_IFDEF) { 711 fputs(else_defined, ofp); 712 def_state = IN_ELSE; 713 } 714 fputs(pfetch(old), ofp); 715 } 716 last_frozen_line++; 717 old++; 718 } 719 else if (new > pat_end) { 720 break; 721 } 722 else if (pch_char(new) == '+') { 723 copy_till(where + old - 1); 724 if (R_do_defines) { 725 if (def_state == IN_IFNDEF) { 726 fputs(else_defined, ofp); 727 def_state = IN_ELSE; 728 } 729 else if (def_state == OUTSIDE) { 730 fputs(if_defined, ofp); 731 def_state = IN_IFDEF; 732 } 733 } 734 fputs(pfetch(new), ofp); 735 new++; 736 } 737 else if (pch_char(new) != pch_char(old)) { 738 say("Out-of-sync patch, lines %ld,%ld--mangled text or line numbers, maybe?\n", 739 pch_hunk_beg() + old, 740 pch_hunk_beg() + new); 741 #ifdef DEBUGGING 742 say("oldchar = '%c', newchar = '%c'\n", 743 pch_char(old), pch_char(new)); 744 #endif 745 my_exit(1); 746 } 747 else if (pch_char(new) == '!') { 748 copy_till(where + old - 1); 749 if (R_do_defines) { 750 fputs(not_defined, ofp); 751 def_state = IN_IFNDEF; 752 } 753 while (pch_char(old) == '!') { 754 if (R_do_defines) { 755 fputs(pfetch(old), ofp); 756 } 757 last_frozen_line++; 758 old++; 759 } 760 if (R_do_defines) { 761 fputs(else_defined, ofp); 762 def_state = IN_ELSE; 763 } 764 while (pch_char(new) == '!') { 765 fputs(pfetch(new), ofp); 766 new++; 767 } 768 } 769 else { 770 assert(pch_char(new) == ' '); 771 old++; 772 new++; 773 if (R_do_defines && def_state != OUTSIDE) { 774 fputs(end_defined, ofp); 775 def_state = OUTSIDE; 776 } 777 } 778 } 779 if (new <= pat_end && pch_char(new) == '+') { 780 copy_till(where + old - 1); 781 if (R_do_defines) { 782 if (def_state == OUTSIDE) { 783 fputs(if_defined, ofp); 784 def_state = IN_IFDEF; 785 } 786 else if (def_state == IN_IFNDEF) { 787 fputs(else_defined, ofp); 788 def_state = IN_ELSE; 789 } 790 } 791 while (new <= pat_end && pch_char(new) == '+') { 792 fputs(pfetch(new), ofp); 793 new++; 794 } 795 } 796 if (R_do_defines && def_state != OUTSIDE) { 797 fputs(end_defined, ofp); 798 } 799 } 800 801 /* Open the new file. */ 802 803 static void 804 init_output(char *name) 805 { 806 ofp = fopen(name, "w"); 807 if (ofp == NULL) 808 pfatal("can't create %s", name); 809 } 810 811 /* Open a file to put hunks we can't locate. */ 812 813 static void 814 init_reject(char *name) 815 { 816 rejfp = fopen(name, "w"); 817 if (rejfp == NULL) 818 pfatal("can't create %s", name); 819 } 820 821 /* Copy input file to output, up to wherever hunk is to be applied. */ 822 823 static void 824 copy_till(LINENUM lastline) 825 { 826 LINENUM R_last_frozen_line = last_frozen_line; 827 828 if (R_last_frozen_line > lastline) 829 fatal("misordered hunks! output would be garbled\n"); 830 while (R_last_frozen_line < lastline) { 831 dump_line(++R_last_frozen_line); 832 } 833 last_frozen_line = R_last_frozen_line; 834 } 835 836 /* Finish copying the input file to the output file. */ 837 838 static void 839 spew_output(void) 840 { 841 #ifdef DEBUGGING 842 if (debug & 256) 843 say("il=%ld lfl=%ld\n",input_lines,last_frozen_line); 844 #endif 845 if (input_lines) 846 copy_till(input_lines); /* dump remainder of file */ 847 Fclose(ofp); 848 ofp = NULL; 849 } 850 851 /* Copy one line from input to output. */ 852 853 static void 854 dump_line(LINENUM line) 855 { 856 char *s; 857 char R_newline = '\n'; 858 859 /* Note: string is not null terminated. */ 860 for (s=ifetch(line, 0); putc(*s, ofp) != R_newline; s++) ; 861 } 862 863 /* Does the patch pattern match at line base+offset? */ 864 865 static bool 866 patch_match(LINENUM base, LINENUM offset, LINENUM fuzz) 867 { 868 LINENUM pline = 1 + fuzz; 869 LINENUM iline; 870 LINENUM pat_lines = pch_ptrn_lines() - fuzz; 871 872 for (iline=base+offset+fuzz; pline <= pat_lines; pline++,iline++) { 873 if (canonicalize) { 874 if (!similar(ifetch(iline, (offset >= 0)), 875 pfetch(pline), 876 pch_line_len(pline) )) 877 return FALSE; 878 } 879 else if (strnNE(ifetch(iline, (offset >= 0)), 880 pfetch(pline), 881 pch_line_len(pline) )) 882 return FALSE; 883 } 884 return TRUE; 885 } 886 887 /* Do two lines match with canonicalized white space? */ 888 889 static bool 890 similar(char *a, char *b, int len) 891 { 892 while (len) { 893 if (isspace((unsigned char)*b)) {/* whitespace (or \n) to match? */ 894 if (!isspace((unsigned char)*a))/* no corresponding whitespace? */ 895 return FALSE; 896 while (len && isspace((unsigned char)*b) && *b != '\n') 897 b++,len--; /* skip pattern whitespace */ 898 while (isspace((unsigned char)*a) && *a != '\n') 899 a++; /* skip target whitespace */ 900 if (*a == '\n' || *b == '\n') 901 return (*a == *b); /* should end in sync */ 902 } 903 else if (*a++ != *b++) /* match non-whitespace chars */ 904 return FALSE; 905 else 906 len--; /* probably not necessary */ 907 } 908 return TRUE; /* actually, this is not reached */ 909 /* since there is always a \n */ 910 } 911 912 /* Exit with cleanup. */ 913 914 void 915 my_exit(int status) 916 { 917 Unlink(TMPINNAME); 918 if (!toutkeep) { 919 Unlink(TMPOUTNAME); 920 } 921 if (!trejkeep) { 922 Unlink(TMPREJNAME); 923 } 924 Unlink(TMPPATNAME); 925 exit(status); 926 } 927