pch.c revision 1.18
1 /* $NetBSD: pch.c,v 1.18 2003/07/12 13:47:44 itojun Exp $ */ 2 3 /* 4 * Copyright (c) 1988, Larry Wall 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following condition 8 * is met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this condition and the following disclaimer. 11 * 12 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 13 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 14 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 15 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 16 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 17 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 18 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 19 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 20 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 21 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 22 * SUCH DAMAGE. 23 */ 24 25 #include <sys/cdefs.h> 26 #ifndef lint 27 __RCSID("$NetBSD: pch.c,v 1.18 2003/07/12 13:47:44 itojun Exp $"); 28 #endif /* not lint */ 29 30 #include "EXTERN.h" 31 #include "common.h" 32 #include "util.h" 33 #include "INTERN.h" 34 #include "pch.h" 35 36 #include <stdlib.h> 37 #include <unistd.h> 38 39 /* Patch (diff listing) abstract type. */ 40 41 static long p_filesize; /* size of the patch file */ 42 static LINENUM p_first; /* 1st line number */ 43 static LINENUM p_newfirst; /* 1st line number of replacement */ 44 static LINENUM p_ptrn_lines; /* # lines in pattern */ 45 static LINENUM p_repl_lines; /* # lines in replacement text */ 46 static LINENUM p_end = -1; /* last line in hunk */ 47 static LINENUM p_max; /* max allowed value of p_end */ 48 static LINENUM p_context = 3; /* # of context lines */ 49 static LINENUM p_input_line = 0; /* current line # from patch file */ 50 static char **p_line = NULL; /* the text of the hunk */ 51 static size_t *p_len = NULL; /* length of each line */ 52 static char *p_char = NULL; /* +, -, and ! */ 53 static int hunkmax = INITHUNKMAX; /* size of above arrays */ 54 static int p_indent; /* indent to patch */ 55 static long p_base; /* where to intuit this time */ 56 static LINENUM p_bline; /* line # of p_base */ 57 static long p_start; /* where intuit found a patch */ 58 static LINENUM p_sline; /* and the line number for it */ 59 static LINENUM p_hunk_beg; /* line number of current hunk */ 60 static LINENUM p_efake = -1; /* end of faked up lines--don't free */ 61 static LINENUM p_bfake = -1; /* beg of faked up lines */ 62 static FILE *pfp = NULL; /* patch file pointer */ 63 64 /* Prepare to look for the next patch in the patch file. */ 65 static void malformed(void); 66 67 void 68 re_patch(void) 69 { 70 p_first = Nulline; 71 p_newfirst = Nulline; 72 p_ptrn_lines = Nulline; 73 p_repl_lines = Nulline; 74 p_end = -1; 75 p_max = Nulline; 76 p_indent = 0; 77 } 78 79 /* 80 * Open the patch file at the beginning of time. 81 */ 82 void 83 open_patch_file(char *filename) 84 { 85 if (filename == NULL || !*filename || strEQ(filename, "-")) { 86 pfp = fopen(TMPPATNAME, "w"); 87 if (pfp == NULL) 88 pfatal("can't create %s", TMPPATNAME); 89 while (fgets(buf, sizeof buf, stdin) != NULL) 90 fputs(buf, pfp); 91 Fclose(pfp); 92 filename = TMPPATNAME; 93 } 94 pfp = fopen(filename, "r"); 95 if (pfp == NULL) 96 pfatal("patch file %s not found", filename); 97 Fstat(fileno(pfp), &filestat); 98 p_filesize = filestat.st_size; 99 next_intuit_at(0L, 1); /* start at the beginning */ 100 set_hunkmax(); 101 } 102 103 /* 104 * Make sure our dynamically realloced tables are malloced to begin with. 105 */ 106 void 107 set_hunkmax(void) 108 { 109 if (p_line == NULL) 110 p_line = xmalloc(hunkmax * sizeof(char *)); 111 if (p_len == NULL) 112 p_len = xmalloc(hunkmax * sizeof(size_t)); 113 if (p_char == NULL) 114 p_char = xmalloc(hunkmax * sizeof(char)); 115 } 116 117 /* 118 * Enlarge the arrays containing the current hunk of patch. 119 */ 120 void 121 grow_hunkmax(void) 122 { 123 hunkmax *= 2; 124 125 p_line = xrealloc(p_line, hunkmax * sizeof(char *)); 126 p_len = xrealloc(p_len, hunkmax * sizeof(size_t)); 127 p_char = xrealloc(p_char, hunkmax * sizeof(char)); 128 } 129 130 /* 131 * True if the remainder of the patch file contains a diff of some sort. 132 */ 133 bool 134 there_is_another_patch(void) 135 { 136 if (p_base != 0L && p_base >= p_filesize) { 137 if (verbose) 138 say("done\n"); 139 return FALSE; 140 } 141 if (verbose) 142 say("Hmm..."); 143 diff_type = intuit_diff_type(); 144 if (!diff_type) { 145 if (p_base != 0L) { 146 if (verbose) 147 say(" Ignoring the trailing garbage.\n" 148 "done\n"); 149 } else 150 say(" I can't seem to find a patch in there" 151 " anywhere.\n"); 152 return FALSE; 153 } 154 if (verbose) 155 say(" %sooks like %s to me...\n", 156 (p_base == 0L ? "L" : "The next patch l"), 157 diff_type == UNI_DIFF ? "a unified diff" : 158 diff_type == CONTEXT_DIFF ? "a context diff" : 159 diff_type == NEW_CONTEXT_DIFF ? 160 "a new-style context diff" : 161 diff_type == NORMAL_DIFF ? "a normal diff" : 162 "an ed script" ); 163 if (p_indent && verbose) 164 say("(Patch is indented %d space%s.)\n", 165 p_indent, p_indent == 1 ? "" : "s"); 166 skip_to(p_start, p_sline); 167 while (filearg[0] == NULL) { 168 if (force || batch) { 169 say("No file to patch. Skipping...\n"); 170 filearg[0] = xstrdup(bestguess); 171 skip_rest_of_patch = TRUE; 172 return TRUE; 173 } 174 ask("File to patch: "); 175 if (*buf != '\n') { 176 if (bestguess) 177 free(bestguess); 178 bestguess = xstrdup(buf); 179 filearg[0] = fetchname(buf, 0, FALSE); 180 } 181 if (filearg[0] == NULL) { 182 ask("No file found--skip this patch? [n] "); 183 if (*buf != 'y') 184 continue; 185 if (verbose) 186 say("Skipping patch...\n"); 187 filearg[0] = fetchname(bestguess, 0, TRUE); 188 skip_rest_of_patch = TRUE; 189 return TRUE; 190 } 191 } 192 return TRUE; 193 } 194 195 /* 196 * Determine what kind of diff is in the remaining part of the patch file. 197 */ 198 int 199 intuit_diff_type(void) 200 { 201 long this_line = 0; 202 long previous_line; 203 long first_command_line = -1; 204 LINENUM fcl_line = -1; 205 bool last_line_was_command = FALSE; 206 bool this_is_a_command = FALSE; 207 bool stars_last_line = FALSE; 208 bool stars_this_line = FALSE; 209 int indent; 210 char *s; 211 char *t; 212 char *indtmp = NULL; 213 char *oldtmp = NULL; 214 char *newtmp = NULL; 215 char *indname = NULL; 216 char *oldname = NULL; 217 char *newname = NULL; 218 int retval; 219 bool no_filearg = (filearg[0] == NULL); 220 221 ok_to_create_file = FALSE; 222 old_file_is_dev_null = FALSE; 223 Fseek(pfp, p_base, 0); 224 p_input_line = p_bline - 1; 225 for (;;) { 226 previous_line = this_line; 227 last_line_was_command = this_is_a_command; 228 stars_last_line = stars_this_line; 229 this_line = ftell(pfp); 230 indent = 0; 231 p_input_line++; 232 if (fgets(buf, sizeof buf, pfp) == NULL) { 233 if (first_command_line >= 0L) { 234 /* nothing but deletes!? */ 235 p_start = first_command_line; 236 p_sline = fcl_line; 237 retval = ED_DIFF; 238 goto scan_exit; 239 } else { 240 p_start = this_line; 241 p_sline = p_input_line; 242 retval = 0; 243 goto scan_exit; 244 } 245 } 246 for (s = buf; *s == ' ' || *s == '\t' || *s == 'X'; s++) { 247 if (*s == '\t') 248 indent += 8 - (indent % 8); 249 else 250 indent++; 251 } 252 for (t = s; isdigit((unsigned char)*t) || *t == ','; t++) 253 ; 254 this_is_a_command = 255 isdigit((unsigned char)*s) && 256 (*t == 'd' || *t == 'c' || *t == 'a'); 257 if (first_command_line < 0L && this_is_a_command) { 258 first_command_line = this_line; 259 fcl_line = p_input_line; 260 p_indent = indent; /* assume this for now */ 261 } 262 if (!stars_last_line && strnEQ(s, "*** ", 4)) 263 oldtmp = xstrdup(s + 4); 264 else if (strnEQ(s, "--- ", 4)) 265 newtmp = xstrdup(s + 4); 266 else if (strnEQ(s, "+++ ", 4)) 267 oldtmp = xstrdup(s + 4); /* pretend it is the old name */ 268 else if (strnEQ(s, "Index:", 6)) 269 indtmp = xstrdup(s + 6); 270 else if (strnEQ(s, "Prereq:", 7)) { 271 for (t = s + 7; isspace((unsigned char)*t); t++) 272 ; 273 revision = xstrdup(t); 274 for (t = revision; 275 *t && !isspace((unsigned char)*t); 276 t++) 277 ; 278 *t = '\0'; 279 if (!*revision) { 280 free(revision); 281 revision = NULL; 282 } 283 } 284 if ((!diff_type || diff_type == ED_DIFF) && 285 first_command_line >= 0L && 286 strEQ(s, ".\n") ) { 287 p_indent = indent; 288 p_start = first_command_line; 289 p_sline = fcl_line; 290 retval = ED_DIFF; 291 goto scan_exit; 292 } 293 if ((!diff_type || diff_type == UNI_DIFF) && 294 strnEQ(s, "@@ -", 4)) { 295 if (!atol(s + 3)) 296 ok_to_create_file = TRUE; 297 p_indent = indent; 298 p_start = this_line; 299 p_sline = p_input_line; 300 retval = UNI_DIFF; 301 goto scan_exit; 302 } 303 stars_this_line = strnEQ(s, "********", 8); 304 if ((!diff_type || diff_type == CONTEXT_DIFF) && 305 stars_last_line && 306 strnEQ(s, "*** ", 4)) { 307 if (!atol(s + 4)) 308 ok_to_create_file = TRUE; 309 /* 310 * If this is a new context diff the character just 311 * before the newline is a '*'. 312 */ 313 while (*s != '\n') 314 s++; 315 p_indent = indent; 316 p_start = previous_line; 317 p_sline = p_input_line - 1; 318 retval = (*(s - 1) == '*' ? 319 NEW_CONTEXT_DIFF : CONTEXT_DIFF); 320 goto scan_exit; 321 } 322 if ((!diff_type || diff_type == NORMAL_DIFF) && 323 last_line_was_command && 324 (strnEQ(s, "< ", 2) || strnEQ(s, "> ", 2)) ) { 325 p_start = previous_line; 326 p_sline = p_input_line - 1; 327 p_indent = indent; 328 retval = NORMAL_DIFF; 329 goto scan_exit; 330 } 331 } 332 scan_exit: 333 if (no_filearg) { 334 if (indtmp != NULL) 335 indname = fetchname(indtmp, 336 strippath, 337 ok_to_create_file); 338 if (oldtmp != NULL) { 339 oldname = fetchname(oldtmp, 340 strippath, 341 ok_to_create_file); 342 old_file_is_dev_null = filename_is_dev_null; 343 } 344 if (newtmp != NULL) 345 newname = fetchname(newtmp, 346 strippath, 347 ok_to_create_file); 348 if (oldname && newname) { 349 if (strlen(oldname) < strlen(newname)) 350 filearg[0] = xstrdup(oldname); 351 else 352 filearg[0] = xstrdup(newname); 353 } 354 else if (oldname) 355 filearg[0] = xstrdup(oldname); 356 else if (newname) 357 filearg[0] = xstrdup(newname); 358 else if (indname) 359 filearg[0] = xstrdup(indname); 360 } 361 if (bestguess) { 362 free(bestguess); 363 bestguess = NULL; 364 } 365 if (filearg[0] != NULL) 366 bestguess = xstrdup(filearg[0]); 367 else if (indtmp != NULL) 368 bestguess = fetchname(indtmp, strippath, TRUE); 369 else { 370 if (oldtmp != NULL) { 371 oldname = fetchname(oldtmp, strippath, TRUE); 372 old_file_is_dev_null = filename_is_dev_null; 373 } 374 if (newtmp != NULL) 375 newname = fetchname(newtmp, strippath, TRUE); 376 if (oldname && newname) { 377 if (strlen(oldname) < strlen(newname)) 378 bestguess = xstrdup(oldname); 379 else 380 bestguess = xstrdup(newname); 381 } 382 else if (oldname) 383 bestguess = xstrdup(oldname); 384 else if (newname) 385 bestguess = xstrdup(newname); 386 } 387 if (indtmp != NULL) 388 free(indtmp); 389 if (oldtmp != NULL) 390 free(oldtmp); 391 if (newtmp != NULL) 392 free(newtmp); 393 if (indname != NULL) 394 free(indname); 395 if (oldname != NULL) 396 free(oldname); 397 if (newname != NULL) 398 free(newname); 399 return retval; 400 } 401 402 /* 403 * Remember where this patch ends so we know where to start up again. 404 */ 405 void 406 next_intuit_at(long file_pos, LINENUM file_line) 407 { 408 p_base = file_pos; 409 p_bline = file_line; 410 } 411 412 /* 413 * Basically a verbose fseek() to the actual diff listing. 414 */ 415 void 416 skip_to(long file_pos, LINENUM file_line) 417 { 418 char *ret; 419 420 if (p_base > file_pos) 421 fatal("seeked too far %ld > %ld\n", p_base, file_pos); 422 if (verbose && p_base < file_pos) { 423 Fseek(pfp, p_base, 0); 424 say("The text leading up to this was:\n" 425 "--------------------------\n"); 426 while (ftell(pfp) < file_pos) { 427 ret = fgets(buf, sizeof buf, pfp); 428 if (ret == NULL) 429 fatal("Unexpected end of file\n"); 430 say("|%s", buf); 431 } 432 say("--------------------------\n"); 433 } 434 else 435 Fseek(pfp, file_pos, 0); 436 p_input_line = file_line - 1; 437 } 438 439 /* 440 * Make this a function for better debugging. 441 */ 442 static void 443 malformed(void) 444 { 445 fatal("malformed patch at line %d: %s", p_input_line, buf); 446 /* about as informative as "Syntax error" in C */ 447 } 448 449 /* 450 * True if the line has been discarded (i.e. it is a line saying 451 * "\ No newline at end of file".) 452 */ 453 static bool 454 remove_special_line(void) 455 { 456 int c; 457 458 c = fgetc(pfp); 459 if (c == '\\') { 460 do { 461 c = fgetc(pfp); 462 } while (c != EOF && c != '\n'); 463 464 return TRUE; 465 } 466 467 if (c != EOF) 468 fseek(pfp, -1L, SEEK_CUR); 469 470 return FALSE; 471 } 472 473 /* 474 * True if there is more of the current diff listing to process. 475 */ 476 bool 477 another_hunk(void) 478 { 479 char *s; 480 char *ret; 481 int context = 0; 482 483 while (p_end >= 0) { 484 if (p_end == p_efake) 485 p_end = p_bfake; /* don't free twice */ 486 else 487 free(p_line[p_end]); 488 p_end--; 489 } 490 if (p_end != -1) 491 fatal("Internal error\n"); 492 p_efake = -1; 493 494 p_max = hunkmax; /* gets reduced when --- found */ 495 if (diff_type == CONTEXT_DIFF || diff_type == NEW_CONTEXT_DIFF) { 496 long line_beginning = ftell(pfp); 497 /* file pos of the current line */ 498 LINENUM repl_beginning = 0; /* index of --- line */ 499 LINENUM fillcnt = 0; /* #lines of missing ptrn or repl */ 500 LINENUM fillsrc = 0; /* index of first line to copy */ 501 LINENUM filldst = 0; /* index of first missing line */ 502 bool ptrn_spaces_eaten = FALSE; /* ptrn was slightly misformed */ 503 bool repl_could_be_missing = TRUE; 504 /* no + or ! lines in this hunk */ 505 bool repl_missing = FALSE; /* we are now backtracking */ 506 long repl_backtrack_position = 0; 507 /* file pos of first repl line */ 508 LINENUM repl_patch_line = 0; /* input line number for same */ 509 LINENUM ptrn_copiable = 0; /* # of copiable lines in ptrn */ 510 511 ret = pgets(buf, sizeof buf, pfp); 512 p_input_line++; 513 if (ret == NULL || strnNE(buf, "********", 8)) { 514 next_intuit_at(line_beginning,p_input_line); 515 return FALSE; 516 } 517 p_context = 100; 518 p_hunk_beg = p_input_line + 1; 519 while (p_end < p_max) { 520 line_beginning = ftell(pfp); 521 ret = pgets(buf, sizeof buf, pfp); 522 p_input_line++; 523 if (ret == NULL) { 524 if (p_max - p_end < 4) 525 Strcpy(buf, " \n"); /* assume blank lines got chopped */ 526 else { 527 if (repl_beginning && repl_could_be_missing) { 528 repl_missing = TRUE; 529 goto hunk_done; 530 } 531 fatal("unexpected end of file in patch\n"); 532 } 533 } 534 p_end++; 535 if (p_end >= hunkmax) 536 fatal("hunk larger than current buffer size\n"); 537 p_char[p_end] = *buf; 538 p_line[p_end] = NULL; 539 switch (*buf) { 540 case '*': 541 if (strnEQ(buf, "********", 8)) { 542 if (repl_beginning && repl_could_be_missing) { 543 repl_missing = TRUE; 544 goto hunk_done; 545 } 546 else 547 fatal("unexpected end of hunk at line %d\n", 548 p_input_line); 549 } 550 if (p_end != 0) { 551 if (repl_beginning && repl_could_be_missing) { 552 repl_missing = TRUE; 553 goto hunk_done; 554 } 555 fatal("unexpected *** at line %d: %s", p_input_line, buf); 556 } 557 context = 0; 558 p_line[p_end] = xstrdup(buf); 559 for (s = buf; *s && !isdigit((unsigned char)*s); s++) 560 ; 561 if (!*s) 562 malformed(); 563 if (strnEQ(s, "0,0", 3)) 564 strcpy(s, s + 2); 565 p_first = atoi(s); 566 while (isdigit((unsigned char)*s)) 567 s++; 568 if (*s == ',') { 569 for (; *s && !isdigit((unsigned char)*s); s++) 570 ; 571 if (!*s) 572 malformed(); 573 p_ptrn_lines = atoi(s) - p_first + 1; 574 } else if (p_first) 575 p_ptrn_lines = 1; 576 else { 577 p_ptrn_lines = 0; 578 p_first = 1; 579 } 580 p_max = p_ptrn_lines + 6; /* we need this much at least */ 581 while (p_max >= hunkmax) 582 grow_hunkmax(); 583 p_max = hunkmax; 584 break; 585 case '-': 586 if (buf[1] == '-') { 587 if (repl_beginning || 588 (p_end != 589 p_ptrn_lines + 1 + (p_char[p_end - 1] == '\n'))) { 590 if (p_end == 1) { 591 /* `old' lines were omitted - set up to fill */ 592 /* them in from 'new' context lines. */ 593 p_end = p_ptrn_lines + 1; 594 fillsrc = p_end + 1; 595 filldst = 1; 596 fillcnt = p_ptrn_lines; 597 } else { 598 if (repl_beginning) { 599 if (repl_could_be_missing) { 600 repl_missing = TRUE; 601 goto hunk_done; 602 } 603 fatal("duplicate \"---\" at line %d" 604 "--check line numbers at line %d\n", 605 p_input_line, 606 p_hunk_beg + repl_beginning); 607 } else { 608 fatal("%s \"---\" at line %d" 609 "--check line numbers at line %d\n", 610 (p_end <= p_ptrn_lines 611 ? "Premature" 612 : "Overdue" ), 613 p_input_line, p_hunk_beg); 614 } 615 } 616 } 617 repl_beginning = p_end; 618 repl_backtrack_position = ftell(pfp); 619 repl_patch_line = p_input_line; 620 p_line[p_end] = xstrdup(buf); 621 p_char[p_end] = '='; 622 for (s = buf; *s && !isdigit((unsigned char)*s); s++) 623 ; 624 if (!*s) 625 malformed(); 626 p_newfirst = atoi(s); 627 while (isdigit((unsigned char)*s)) 628 s++; 629 if (*s == ',') { 630 for (; *s && !isdigit((unsigned char)*s); s++) 631 ; 632 if (!*s) 633 malformed(); 634 p_repl_lines = atoi(s) - p_newfirst + 1; 635 } else if (p_newfirst) 636 p_repl_lines = 1; 637 else { 638 p_repl_lines = 0; 639 p_newfirst = 1; 640 } 641 p_max = p_repl_lines + p_end; 642 if (p_max > MAXHUNKSIZE) 643 fatal("hunk too large (%d lines) at line %d: %s", 644 p_max, p_input_line, buf); 645 while (p_max >= hunkmax) 646 grow_hunkmax(); 647 if (p_repl_lines != ptrn_copiable 648 && (p_context != 0 || p_repl_lines != 1)) 649 repl_could_be_missing = FALSE; 650 break; 651 } 652 goto change_line; 653 case '+': case '!': 654 repl_could_be_missing = FALSE; 655 change_line: 656 if (buf[1] == '\n' && canonicalize) 657 strcpy(buf + 1," \n"); 658 if (!isspace((unsigned char)buf[1]) && 659 buf[1] != '>' && buf[1] != '<' && 660 repl_beginning && repl_could_be_missing) { 661 repl_missing = TRUE; 662 goto hunk_done; 663 } 664 if (context >= 0) { 665 if (context < p_context) 666 p_context = context; 667 context = -1000; 668 } 669 p_line[p_end] = xstrdup(buf + 2); 670 if (p_end == p_ptrn_lines) 671 { 672 if (remove_special_line()) { 673 int len; 674 675 len = strlen(p_line[p_end]) - 1; 676 (p_line[p_end])[len] = 0; 677 } 678 } 679 break; 680 case '\t': case '\n': /* assume the 2 spaces got eaten */ 681 if (repl_beginning && repl_could_be_missing && 682 (!ptrn_spaces_eaten || diff_type == NEW_CONTEXT_DIFF)) { 683 repl_missing = TRUE; 684 goto hunk_done; 685 } 686 p_line[p_end] = xstrdup(buf); 687 if (p_end != p_ptrn_lines + 1) { 688 ptrn_spaces_eaten |= (repl_beginning != 0); 689 context++; 690 if (!repl_beginning) 691 ptrn_copiable++; 692 p_char[p_end] = ' '; 693 } 694 break; 695 case ' ': 696 if (!isspace((unsigned char)buf[1]) && 697 repl_beginning && repl_could_be_missing) { 698 repl_missing = TRUE; 699 goto hunk_done; 700 } 701 context++; 702 if (!repl_beginning) 703 ptrn_copiable++; 704 p_line[p_end] = xstrdup(buf + 2); 705 break; 706 default: 707 if (repl_beginning && repl_could_be_missing) { 708 repl_missing = TRUE; 709 goto hunk_done; 710 } 711 malformed(); 712 } 713 /* set up p_len for strncmp() so we don't have to */ 714 /* assume null termination */ 715 if (p_line[p_end]) 716 p_len[p_end] = strlen(p_line[p_end]); 717 else 718 p_len[p_end] = 0; 719 } 720 721 hunk_done: 722 if (p_end >= 0 && !repl_beginning) 723 fatal("no --- found in patch at line %d\n", pch_hunk_beg()); 724 725 if (repl_missing) { 726 /* reset state back to just after --- */ 727 p_input_line = repl_patch_line; 728 for (p_end--; p_end > repl_beginning; p_end--) 729 free(p_line[p_end]); 730 Fseek(pfp, repl_backtrack_position, 0); 731 732 /* redundant 'new' context lines were omitted - set */ 733 /* up to fill them in from the old file context */ 734 if (!p_context && p_repl_lines == 1) { 735 p_repl_lines = 0; 736 p_max--; 737 } 738 fillsrc = 1; 739 filldst = repl_beginning + 1; 740 fillcnt = p_repl_lines; 741 p_end = p_max; 742 } else if (!p_context && fillcnt == 1) { 743 /* the first hunk was a null hunk with no context */ 744 /* and we were expecting one line -- fix it up. */ 745 while (filldst < p_end) { 746 p_line[filldst] = p_line[filldst + 1]; 747 p_char[filldst] = p_char[filldst + 1]; 748 p_len[filldst] = p_len[filldst + 1]; 749 filldst++; 750 } 751 #if 0 752 repl_beginning--; /* this doesn't need to be fixed */ 753 #endif 754 p_end--; 755 p_first++; /* do append rather than insert */ 756 fillcnt = 0; 757 p_ptrn_lines = 0; 758 } 759 760 if (diff_type == CONTEXT_DIFF && 761 (fillcnt || (p_first > 1 && ptrn_copiable > 2 * p_context))) { 762 if (verbose) 763 say("%s\n", 764 "(Fascinating--this is really a new-style context diff" 765 "but without\nthe telltale extra asterisks on the *** " 766 "line that usually indicate\nthe new style...)"); 767 diff_type = NEW_CONTEXT_DIFF; 768 } 769 770 /* if there were omitted context lines, fill them in now */ 771 if (fillcnt) { 772 p_bfake = filldst; /* remember where not to free() */ 773 p_efake = filldst + fillcnt - 1; 774 while (fillcnt-- > 0) { 775 while (fillsrc <= p_end && p_char[fillsrc] != ' ') 776 fillsrc++; 777 if (fillsrc > p_end) 778 fatal("replacement text or line numbers mangled in" 779 " hunk at line %d\n", 780 p_hunk_beg); 781 p_line[filldst] = p_line[fillsrc]; 782 p_char[filldst] = p_char[fillsrc]; 783 p_len[filldst] = p_len[fillsrc]; 784 fillsrc++; filldst++; 785 } 786 while (fillsrc <= p_end && fillsrc != repl_beginning && 787 p_char[fillsrc] != ' ') 788 fillsrc++; 789 #ifdef DEBUGGING 790 if (debug & 64) 791 printf("fillsrc %d, filldst %d, rb %d, e %d\n", 792 fillsrc, filldst, repl_beginning, p_end); 793 #endif 794 if (fillsrc != p_end + 1 && fillsrc != repl_beginning) 795 malformed(); 796 if (filldst != p_end + 1 && filldst != repl_beginning) 797 malformed(); 798 } 799 800 if (p_line[p_end] != NULL) 801 { 802 if (remove_special_line()) { 803 p_len[p_end] -= 1; 804 (p_line[p_end])[p_len[p_end]] = 0; 805 } 806 } 807 } else if (diff_type == UNI_DIFF) { 808 long line_beginning = ftell(pfp); 809 /* file pos of the current line */ 810 LINENUM fillsrc; /* index of old lines */ 811 LINENUM filldst; /* index of new lines */ 812 char ch; 813 814 ret = pgets(buf, sizeof buf, pfp); 815 p_input_line++; 816 if (ret == NULL || strnNE(buf, "@@ -", 4)) { 817 next_intuit_at(line_beginning,p_input_line); 818 return FALSE; 819 } 820 s = buf + 4; 821 if (!*s) 822 malformed(); 823 p_first = atoi(s); 824 while (isdigit((unsigned char)*s)) 825 s++; 826 if (*s == ',') { 827 p_ptrn_lines = atoi(++s); 828 while (isdigit((unsigned char)*s)) 829 s++; 830 } else 831 p_ptrn_lines = 1; 832 if (*s == ' ') 833 s++; 834 if (*s != '+' || !*++s) 835 malformed(); 836 p_newfirst = atoi(s); 837 while (isdigit((unsigned char)*s)) 838 s++; 839 if (*s == ',') { 840 p_repl_lines = atoi(++s); 841 while (isdigit((unsigned char)*s)) 842 s++; 843 } else 844 p_repl_lines = 1; 845 if (*s == ' ') 846 s++; 847 if (*s != '@') 848 malformed(); 849 if (!p_ptrn_lines) 850 p_first++; /* do append rather than insert */ 851 p_max = p_ptrn_lines + p_repl_lines + 1; 852 while (p_max >= hunkmax) 853 grow_hunkmax(); 854 fillsrc = 1; 855 filldst = fillsrc + p_ptrn_lines; 856 p_end = filldst + p_repl_lines; 857 Sprintf(buf, "*** %d,%d ****\n", p_first, p_first + p_ptrn_lines - 1); 858 p_line[0] = xstrdup(buf); 859 p_char[0] = '*'; 860 Sprintf(buf, "--- %d,%d ----\n", p_newfirst, 861 p_newfirst + p_repl_lines - 1); 862 p_line[filldst] = xstrdup(buf); 863 p_char[filldst++] = '='; 864 p_context = 100; 865 context = 0; 866 p_hunk_beg = p_input_line + 1; 867 while (fillsrc <= p_ptrn_lines || filldst <= p_end) { 868 line_beginning = ftell(pfp); 869 ret = pgets(buf, sizeof buf, pfp); 870 p_input_line++; 871 if (ret == NULL) { 872 if (p_max - filldst < 3) 873 Strcpy(buf, " \n"); /* assume blank lines got chopped */ 874 else { 875 fatal("unexpected end of file in patch\n"); 876 } 877 } 878 if (*buf == '\t' || *buf == '\n') { 879 ch = ' '; /* assume the space got eaten */ 880 s = xstrdup(buf); 881 } else { 882 ch = *buf; 883 s = xstrdup(buf + 1); 884 } 885 switch (ch) { 886 case '-': 887 if (fillsrc > p_ptrn_lines) { 888 free(s); 889 p_end = filldst - 1; 890 malformed(); 891 } 892 p_char[fillsrc] = ch; 893 p_line[fillsrc] = s; 894 p_len[fillsrc++] = strlen(s); 895 if (fillsrc > p_ptrn_lines) { 896 if (remove_special_line()) { 897 p_len[fillsrc - 1] -= 1; 898 s[p_len[fillsrc - 1]] = 0; 899 } 900 } 901 break; 902 case '=': 903 ch = ' '; 904 /* FALLTHROUGH */ 905 case ' ': 906 if (fillsrc > p_ptrn_lines) { 907 free(s); 908 while (--filldst > p_ptrn_lines) 909 free(p_line[filldst]); 910 p_end = fillsrc - 1; 911 malformed(); 912 } 913 context++; 914 p_char[fillsrc] = ch; 915 p_line[fillsrc] = s; 916 p_len[fillsrc++] = strlen(s); 917 s = xstrdup(s); 918 /* FALLTHROUGH */ 919 case '+': 920 if (filldst > p_end) { 921 free(s); 922 while (--filldst > p_ptrn_lines) 923 free(p_line[filldst]); 924 p_end = fillsrc - 1; 925 malformed(); 926 } 927 p_char[filldst] = ch; 928 p_line[filldst] = s; 929 p_len[filldst++] = strlen(s); 930 if (fillsrc > p_ptrn_lines) { 931 if (remove_special_line()) { 932 p_len[filldst - 1] -= 1; 933 s[p_len[filldst - 1]] = 0; 934 } 935 } 936 break; 937 default: 938 p_end = filldst; 939 malformed(); 940 } 941 if (ch != ' ' && context > 0) { 942 if (context < p_context) 943 p_context = context; 944 context = -1000; 945 } 946 }/* while */ 947 } else { /* normal diff--fake it up */ 948 char hunk_type; 949 int i; 950 LINENUM min, max; 951 long line_beginning = ftell(pfp); 952 953 p_context = 0; 954 ret = pgets(buf, sizeof buf, pfp); 955 p_input_line++; 956 if (ret == NULL || !isdigit((unsigned char)*buf)) { 957 next_intuit_at(line_beginning, p_input_line); 958 return FALSE; 959 } 960 p_first = atoi(buf); 961 for (s = buf; isdigit((unsigned char)*s); s++) 962 ; 963 if (*s == ',') { 964 p_ptrn_lines = atoi(++s) - p_first + 1; 965 while (isdigit((unsigned char)*s)) 966 s++; 967 } else 968 p_ptrn_lines = (*s != 'a'); 969 hunk_type = *s; 970 if (hunk_type == 'a') 971 p_first++; /* do append rather than insert */ 972 min = atoi(++s); 973 for (; isdigit((unsigned char)*s); s++) 974 ; 975 if (*s == ',') 976 max = atoi(++s); 977 else 978 max = min; 979 if (hunk_type == 'd') 980 min++; 981 p_end = p_ptrn_lines + 1 + max - min + 1; 982 if (p_end > MAXHUNKSIZE) 983 fatal("hunk too large (%d lines) at line %d: %s", 984 p_end, p_input_line, buf); 985 while (p_end >= hunkmax) 986 grow_hunkmax(); 987 p_newfirst = min; 988 p_repl_lines = max - min + 1; 989 Sprintf(buf, "*** %d,%d\n", p_first, p_first + p_ptrn_lines - 1); 990 p_line[0] = xstrdup(buf); 991 p_char[0] = '*'; 992 for (i = 1; i <= p_ptrn_lines; i++) { 993 ret = pgets(buf, sizeof buf, pfp); 994 p_input_line++; 995 if (ret == NULL) 996 fatal("unexpected end of file in patch at line %d\n", 997 p_input_line); 998 if (*buf != '<') 999 fatal("< expected at line %d of patch\n", p_input_line); 1000 p_line[i] = xstrdup(buf + 2); 1001 p_len[i] = strlen(p_line[i]); 1002 p_char[i] = '-'; 1003 } 1004 1005 if (remove_special_line()) { 1006 p_len[i - 1] -= 1; 1007 (p_line[i - 1])[p_len[i - 1]] = 0; 1008 } 1009 1010 if (hunk_type == 'c') { 1011 ret = pgets(buf, sizeof buf, pfp); 1012 p_input_line++; 1013 if (ret == NULL) 1014 fatal("unexpected end of file in patch at line %d\n", 1015 p_input_line); 1016 if (*buf != '-') 1017 fatal("--- expected at line %d of patch\n", p_input_line); 1018 } 1019 Sprintf(buf, "--- %d,%d\n", min, max); 1020 p_line[i] = xstrdup(buf); 1021 p_char[i] = '='; 1022 for (i++; i <= p_end; i++) { 1023 ret = pgets(buf, sizeof buf, pfp); 1024 p_input_line++; 1025 if (ret == NULL) 1026 fatal("unexpected end of file in patch at line %d\n", 1027 p_input_line); 1028 if (*buf != '>') 1029 fatal("> expected at line %d of patch\n", p_input_line); 1030 p_line[i] = xstrdup(buf + 2); 1031 p_len[i] = strlen(p_line[i]); 1032 p_char[i] = '+'; 1033 } 1034 1035 if (remove_special_line()) { 1036 p_len[i - 1] -= 1; 1037 (p_line[i - 1])[p_len[i - 1]] = 0; 1038 } 1039 } 1040 if (reverse) /* backwards patch? */ 1041 if (!pch_swap()) 1042 say("Not enough memory to swap next hunk!\n"); 1043 #ifdef DEBUGGING 1044 if (debug & 2) { 1045 int i; 1046 char special; 1047 1048 for (i = 0; i <= p_end; i++) { 1049 if (i == p_ptrn_lines) 1050 special = '^'; 1051 else 1052 special = ' '; 1053 fprintf(stderr, "%3d %c %c %s", i, p_char[i], special, p_line[i]); 1054 Fflush(stderr); 1055 } 1056 } 1057 #endif 1058 if (p_end + 1 < hunkmax) /* paranoia reigns supreme... */ 1059 p_char[p_end + 1] = '^'; /* add a stopper for apply_hunk */ 1060 return TRUE; 1061 } 1062 1063 /* 1064 * Input a line from the patch file, worrying about indentation. 1065 */ 1066 char * 1067 pgets(char *bf, int sz, FILE *fp) 1068 { 1069 char *ret = fgets(bf, sz, fp); 1070 char *s; 1071 int indent = 0; 1072 1073 if (p_indent && ret != NULL) { 1074 for (s = buf; 1075 indent < p_indent && 1076 (*s == ' ' || *s == '\t' || *s == 'X'); 1077 s++) { 1078 if (*s == '\t') 1079 indent += 8 - (indent % 7); 1080 else 1081 indent++; 1082 } 1083 if (buf != s) 1084 Strcpy(buf, s); 1085 } 1086 return ret; 1087 } 1088 1089 /* 1090 * Reverse the old and new portions of the current hunk. 1091 */ 1092 bool 1093 pch_swap(void) 1094 { 1095 char **tp_line; /* the text of the hunk */ 1096 size_t *tp_len; /* length of each line */ 1097 char *tp_char; /* +, -, and ! */ 1098 LINENUM i; 1099 LINENUM n; 1100 bool blankline = FALSE; 1101 char *s; 1102 1103 i = p_first; 1104 p_first = p_newfirst; 1105 p_newfirst = i; 1106 1107 /* make a scratch copy */ 1108 1109 tp_line = p_line; 1110 tp_len = p_len; 1111 tp_char = p_char; 1112 p_line = NULL; /* force set_hunkmax to allocate again */ 1113 p_len = NULL; 1114 p_char = NULL; 1115 set_hunkmax(); 1116 if (p_line == NULL || p_len == NULL || p_char == NULL) { 1117 if (p_line == NULL) 1118 free(p_line); 1119 p_line = tp_line; 1120 if (p_len == NULL) 1121 free(p_len); 1122 p_len = tp_len; 1123 if (p_char == NULL) 1124 free(p_char); 1125 p_char = tp_char; 1126 return FALSE; /* not enough memory to swap hunk! */ 1127 } 1128 1129 /* now turn the new into the old */ 1130 1131 i = p_ptrn_lines + 1; 1132 if (tp_char[i] == '\n') { /* account for possible blank line */ 1133 blankline = TRUE; 1134 i++; 1135 } 1136 if (p_efake >= 0) { /* fix non-freeable ptr range */ 1137 if (p_efake <= i) 1138 n = p_end - i + 1; 1139 else 1140 n = -i; 1141 p_efake += n; 1142 p_bfake += n; 1143 } 1144 for (n = 0; i <= p_end; i++, n++) { 1145 p_line[n] = tp_line[i]; 1146 p_char[n] = tp_char[i]; 1147 if (p_char[n] == '+') 1148 p_char[n] = '-'; 1149 p_len[n] = tp_len[i]; 1150 } 1151 if (blankline) { 1152 i = p_ptrn_lines + 1; 1153 p_line[n] = tp_line[i]; 1154 p_char[n] = tp_char[i]; 1155 p_len[n] = tp_len[i]; 1156 n++; 1157 } 1158 if (p_char[0] != '=') 1159 fatal("malformed patch at line %d: expected `=' found `%c'\n", 1160 p_input_line, p_char[0]); 1161 p_char[0] = '*'; 1162 for (s = p_line[0]; *s; s++) 1163 if (*s == '-') 1164 *s = '*'; 1165 1166 /* now turn the old into the new */ 1167 1168 if (tp_char[0] != '*') 1169 fatal("malformed patch at line %d: expected `*' found `%c'\n", 1170 p_input_line, tp_char[0]); 1171 tp_char[0] = '='; 1172 for (s = tp_line[0]; *s; s++) 1173 if (*s == '*') 1174 *s = '-'; 1175 for (i = 0; n <= p_end; i++, n++) { 1176 p_line[n] = tp_line[i]; 1177 p_char[n] = tp_char[i]; 1178 if (p_char[n] == '-') 1179 p_char[n] = '+'; 1180 p_len[n] = tp_len[i]; 1181 } 1182 if (i != p_ptrn_lines + 1) 1183 fatal("malformed patch at line %d: need %d lines, got %d\n", 1184 p_input_line, p_ptrn_lines + 1, i); 1185 i = p_ptrn_lines; 1186 p_ptrn_lines = p_repl_lines; 1187 p_repl_lines = i; 1188 if (tp_line == NULL) 1189 free(tp_line); 1190 if (tp_len == NULL) 1191 free(tp_len); 1192 if (tp_char == NULL) 1193 free(tp_char); 1194 return TRUE; 1195 } 1196 1197 /* 1198 * Return the specified line position in the old file of the old context. 1199 */ 1200 LINENUM 1201 pch_first(void) 1202 { 1203 return p_first; 1204 } 1205 1206 /* 1207 * Return the number of lines of old context. 1208 */ 1209 LINENUM 1210 pch_ptrn_lines(void) 1211 { 1212 return p_ptrn_lines; 1213 } 1214 1215 /* 1216 * Return the probable line position in the new file of the first line. 1217 */ 1218 LINENUM 1219 pch_newfirst(void) 1220 { 1221 return p_newfirst; 1222 } 1223 1224 /* 1225 * Return the number of lines in the replacement text including context. 1226 */ 1227 LINENUM 1228 pch_repl_lines(void) 1229 { 1230 return p_repl_lines; 1231 } 1232 1233 /* 1234 * Return the number of lines in the whole hunk. 1235 */ 1236 LINENUM 1237 pch_end(void) 1238 { 1239 return p_end; 1240 } 1241 1242 /* 1243 * Return the number of context lines before the first changed line. 1244 */ 1245 LINENUM 1246 pch_context(void) 1247 { 1248 return p_context; 1249 } 1250 1251 /* 1252 * Return the length of a particular patch line. 1253 */ 1254 size_t 1255 pch_line_len(LINENUM line) 1256 { 1257 return p_len[line]; 1258 } 1259 1260 /* 1261 * Return the control character (+, -, *, !, etc) for a patch line. 1262 */ 1263 char 1264 pch_char(LINENUM line) 1265 { 1266 return p_char[line]; 1267 } 1268 1269 /* 1270 * Return a pointer to a particular patch line. 1271 */ 1272 char * 1273 pfetch(LINENUM line) 1274 { 1275 return p_line[line]; 1276 } 1277 1278 /* 1279 * Return where in the patch file this hunk began, for error messages. 1280 */ 1281 LINENUM 1282 pch_hunk_beg(void) 1283 { 1284 return p_hunk_beg; 1285 } 1286 1287 /* 1288 * Apply an ed script by feeding ed itself. 1289 */ 1290 void 1291 do_ed_script(void) 1292 { 1293 char *t; 1294 long beginning_of_this_line; 1295 bool this_line_is_command = FALSE; 1296 FILE *pipefp = NULL; 1297 1298 if (!skip_rest_of_patch) { 1299 Unlink(TMPOUTNAME); 1300 copy_file(filearg[0], TMPOUTNAME); 1301 if (verbose) 1302 Sprintf(buf, "/bin/ed %s", TMPOUTNAME); 1303 else 1304 Sprintf(buf, "/bin/ed - %s", TMPOUTNAME); 1305 pipefp = popen(buf, "w"); 1306 } 1307 for (;;) { 1308 beginning_of_this_line = ftell(pfp); 1309 if (pgets(buf, sizeof buf, pfp) == NULL) { 1310 next_intuit_at(beginning_of_this_line, p_input_line); 1311 break; 1312 } 1313 p_input_line++; 1314 for (t = buf; isdigit((unsigned char)*t) || *t == ','; t++) 1315 ; 1316 this_line_is_command = (isdigit((unsigned char)*buf) && 1317 (*t == 'd' || *t == 'c' || *t == 'a')); 1318 if (this_line_is_command) { 1319 if (!skip_rest_of_patch) 1320 fputs(buf, pipefp); 1321 if (*t != 'd') { 1322 while (pgets(buf, sizeof buf, pfp) != NULL) { 1323 p_input_line++; 1324 if (!skip_rest_of_patch) 1325 fputs(buf, pipefp); 1326 if (strEQ(buf, ".\n")) 1327 break; 1328 } 1329 } 1330 } else { 1331 next_intuit_at(beginning_of_this_line,p_input_line); 1332 break; 1333 } 1334 } 1335 if (skip_rest_of_patch) 1336 return; 1337 fprintf(pipefp, "w\n"); 1338 fprintf(pipefp, "q\n"); 1339 Fflush(pipefp); 1340 Pclose(pipefp); 1341 ignore_signals(); 1342 if (move_file(TMPOUTNAME, outname) < 0) { 1343 toutkeep = TRUE; 1344 chmod(TMPOUTNAME, filemode); 1345 } else 1346 chmod(outname, filemode); 1347 set_signals(1); 1348 } 1349
Indexes created Mon Sep 22 05:09:51 GMT 2025