1 /* $NetBSD: pch.c,v 1.12 2002/03/16 23:55:02 kristerw Exp $ */ 2 #include <sys/cdefs.h> 3 #ifndef lint 4 __RCSID("$NetBSD: pch.c,v 1.12 2002/03/16 23:55:02 kristerw Exp $"); 5 #endif /* not lint */ 6 7 #include "EXTERN.h" 8 #include "common.h" 9 #include "util.h" 10 #include "INTERN.h" 11 #include "pch.h" 12 13 #include <stdlib.h> 14 #include <unistd.h> 15 16 /* Patch (diff listing) abstract type. */ 17 18 static long p_filesize; /* size of the patch file */ 19 static LINENUM p_first; /* 1st line number */ 20 static LINENUM p_newfirst; /* 1st line number of replacement */ 21 static LINENUM p_ptrn_lines; /* # lines in pattern */ 22 static LINENUM p_repl_lines; /* # lines in replacement text */ 23 static LINENUM p_end = -1; /* last line in hunk */ 24 static LINENUM p_max; /* max allowed value of p_end */ 25 static LINENUM p_context = 3; /* # of context lines */ 26 static LINENUM p_input_line = 0; /* current line # from patch file */ 27 static char **p_line = NULL; /* the text of the hunk */ 28 static short *p_len = NULL; /* length of each line */ 29 static char *p_char = NULL; /* +, -, and ! */ 30 static int hunkmax = INITHUNKMAX; /* size of above arrays to begin with */ 31 static int p_indent; /* indent to patch */ 32 static LINENUM p_base; /* where to intuit this time */ 33 static LINENUM p_bline; /* line # of p_base */ 34 static LINENUM p_start; /* where intuit found a patch */ 35 static LINENUM p_sline; /* and the line number for it */ 36 static LINENUM p_hunk_beg; /* line number of current hunk */ 37 static LINENUM p_efake = -1; /* end of faked up lines--don't free */ 38 static LINENUM p_bfake = -1; /* beg of faked up lines */ 39 static FILE *pfp = NULL; /* patch file pointer */ 40 41 /* Prepare to look for the next patch in the patch file. */ 42 static void malformed(void); 43 44 void 45 re_patch(void) 46 { 47 p_first = Nulline; 48 p_newfirst = Nulline; 49 p_ptrn_lines = Nulline; 50 p_repl_lines = Nulline; 51 p_end = -1; 52 p_max = Nulline; 53 p_indent = 0; 54 } 55 56 /* 57 * Open the patch file at the beginning of time. 58 */ 59 void 60 open_patch_file(char *filename) 61 { 62 if (filename == NULL || !*filename || strEQ(filename, "-")) { 63 pfp = fopen(TMPPATNAME, "w"); 64 if (pfp == NULL) 65 pfatal("can't create %s", TMPPATNAME); 66 while (fgets(buf, sizeof buf, stdin) != NULL) 67 fputs(buf, pfp); 68 Fclose(pfp); 69 filename = TMPPATNAME; 70 } 71 pfp = fopen(filename, "r"); 72 if (pfp == NULL) 73 pfatal("patch file %s not found", filename); 74 Fstat(fileno(pfp), &filestat); 75 p_filesize = filestat.st_size; 76 next_intuit_at(0L,1L); /* start at the beginning */ 77 set_hunkmax(); 78 } 79 80 /* 81 * Make sure our dynamically realloced tables are malloced to begin with. 82 */ 83 void 84 set_hunkmax(void) 85 { 86 if (p_line == NULL) 87 p_line = malloc(hunkmax * sizeof(char *)); 88 if (p_len == NULL) 89 p_len = malloc(hunkmax * sizeof(short)); 90 if (p_char == NULL) 91 p_char = malloc(hunkmax * sizeof(char)); 92 } 93 94 /* 95 * Enlarge the arrays containing the current hunk of patch. 96 */ 97 void 98 grow_hunkmax(void) 99 { 100 char **tp_line; 101 short *tp_len; 102 char *tp_char; 103 104 hunkmax *= 2; 105 assert(p_line != NULL && p_len != NULL && p_char != NULL); 106 tp_line = p_line; 107 tp_len = p_len; 108 tp_char = p_char; 109 p_line = realloc(p_line, hunkmax * sizeof(char *)); 110 p_len = realloc(p_len, hunkmax * sizeof(short)); 111 p_char = realloc(p_char, hunkmax * sizeof(char)); 112 if (p_line != NULL && p_len != NULL && p_char != NULL) 113 return; 114 if (!using_plan_a) 115 fatal("out of memory\n"); 116 out_of_mem = TRUE; /* whatever is null will be allocated again */ 117 /* from within plan_a(), of all places */ 118 if (p_line == NULL) 119 free(tp_line); 120 if (p_len == NULL) 121 free(tp_len); 122 if (p_char == NULL) 123 free(tp_char); 124 } 125 126 /* 127 * True if the remainder of the patch file contains a diff of some sort. 128 */ 129 bool 130 there_is_another_patch(void) 131 { 132 if (p_base != 0L && p_base >= p_filesize) { 133 if (verbose) 134 say("done\n"); 135 return FALSE; 136 } 137 if (verbose) 138 say("Hmm..."); 139 diff_type = intuit_diff_type(); 140 if (!diff_type) { 141 if (p_base != 0L) { 142 if (verbose) 143 say(" Ignoring the trailing garbage.\ndone\n"); 144 } 145 else 146 say(" I can't seem to find a patch in there anywhere.\n"); 147 return FALSE; 148 } 149 if (verbose) 150 say(" %sooks like %s to me...\n", 151 (p_base == 0L ? "L" : "The next patch l"), 152 diff_type == UNI_DIFF ? "a unified diff" : 153 diff_type == CONTEXT_DIFF ? "a context diff" : 154 diff_type == NEW_CONTEXT_DIFF ? 155 "a new-style context diff" : 156 diff_type == NORMAL_DIFF ? "a normal diff" : 157 "an ed script" ); 158 if (p_indent && verbose) 159 say("(Patch is indented %d space%s.)\n", 160 p_indent, p_indent==1?"":"s"); 161 skip_to(p_start,p_sline); 162 while (filearg[0] == NULL) { 163 if (force || batch) { 164 say("No file to patch. Skipping...\n"); 165 filearg[0] = xstrdup(bestguess); 166 skip_rest_of_patch = TRUE; 167 return TRUE; 168 } 169 ask("File to patch: "); 170 if (*buf != '\n') { 171 if (bestguess) 172 free(bestguess); 173 bestguess = xstrdup(buf); 174 filearg[0] = fetchname(buf, 0, FALSE); 175 } 176 if (filearg[0] == NULL) { 177 ask("No file found--skip this patch? [n] "); 178 if (*buf != 'y') { 179 continue; 180 } 181 if (verbose) 182 say("Skipping patch...\n"); 183 filearg[0] = fetchname(bestguess, 0, TRUE); 184 skip_rest_of_patch = TRUE; 185 return TRUE; 186 } 187 } 188 return TRUE; 189 } 190 191 /* 192 * Determine what kind of diff is in the remaining part of the patch file. 193 */ 194 int 195 intuit_diff_type(void) 196 { 197 long this_line = 0; 198 long previous_line; 199 long first_command_line = -1; 200 long fcl_line = -1; 201 bool last_line_was_command = FALSE; 202 bool this_is_a_command = FALSE; 203 bool stars_last_line = FALSE; 204 bool stars_this_line = FALSE; 205 int indent; 206 char *s; 207 char *t; 208 char *indtmp = NULL; 209 char *oldtmp = NULL; 210 char *newtmp = NULL; 211 char *indname = NULL; 212 char *oldname = NULL; 213 char *newname = NULL; 214 int retval; 215 bool no_filearg = (filearg[0] == NULL); 216 217 ok_to_create_file = FALSE; 218 old_file_is_dev_null = FALSE; 219 Fseek(pfp, p_base, 0); 220 p_input_line = p_bline - 1; 221 for (;;) { 222 previous_line = this_line; 223 last_line_was_command = this_is_a_command; 224 stars_last_line = stars_this_line; 225 this_line = ftell(pfp); 226 indent = 0; 227 p_input_line++; 228 if (fgets(buf, sizeof buf, pfp) == NULL) { 229 if (first_command_line >= 0L) { 230 /* nothing but deletes!? */ 231 p_start = first_command_line; 232 p_sline = fcl_line; 233 retval = ED_DIFF; 234 goto scan_exit; 235 } 236 else { 237 p_start = this_line; 238 p_sline = p_input_line; 239 retval = 0; 240 goto scan_exit; 241 } 242 } 243 for (s = buf; *s == ' ' || *s == '\t' || *s == 'X'; s++) { 244 if (*s == '\t') 245 indent += 8 - (indent % 8); 246 else 247 indent++; 248 } 249 for (t=s; isdigit((unsigned char)*t) || *t == ','; t++) ; 250 this_is_a_command = (isdigit((unsigned char)*s) && 251 (*t == 'd' || *t == 'c' || *t == 'a') ); 252 if (first_command_line < 0L && this_is_a_command) { 253 first_command_line = this_line; 254 fcl_line = p_input_line; 255 p_indent = indent; /* assume this for now */ 256 } 257 if (!stars_last_line && strnEQ(s, "*** ", 4)) 258 oldtmp = xstrdup(s + 4); 259 else if (strnEQ(s, "--- ", 4)) 260 newtmp = xstrdup(s + 4); 261 else if (strnEQ(s, "+++ ", 4)) 262 oldtmp = xstrdup(s + 4); /* pretend it is the old name */ 263 else if (strnEQ(s, "Index:", 6)) 264 indtmp = xstrdup(s + 6); 265 else if (strnEQ(s, "Prereq:", 7)) { 266 for (t = s + 7; isspace((unsigned char)*t); t++) 267 ; 268 revision = xstrdup(t); 269 for (t = revision; 270 *t && !isspace((unsigned char)*t); 271 t++) 272 ; 273 *t = '\0'; 274 if (!*revision) { 275 free(revision); 276 revision = NULL; 277 } 278 } 279 if ((!diff_type || diff_type == ED_DIFF) && 280 first_command_line >= 0L && 281 strEQ(s, ".\n") ) { 282 p_indent = indent; 283 p_start = first_command_line; 284 p_sline = fcl_line; 285 retval = ED_DIFF; 286 goto scan_exit; 287 } 288 if ((!diff_type || diff_type == UNI_DIFF) && 289 strnEQ(s, "@@ -", 4)) { 290 if (!atol(s+3)) 291 ok_to_create_file = TRUE; 292 p_indent = indent; 293 p_start = this_line; 294 p_sline = p_input_line; 295 retval = UNI_DIFF; 296 goto scan_exit; 297 } 298 stars_this_line = strnEQ(s, "********", 8); 299 if ((!diff_type || diff_type == CONTEXT_DIFF) && 300 stars_last_line && 301 strnEQ(s, "*** ", 4)) { 302 if (!atol(s+4)) 303 ok_to_create_file = TRUE; 304 /* 305 * If this is a new context diff the character just 306 * before the newline is a '*'. 307 */ 308 while (*s != '\n') 309 s++; 310 p_indent = indent; 311 p_start = previous_line; 312 p_sline = p_input_line - 1; 313 retval = (*(s-1) == '*' ? 314 NEW_CONTEXT_DIFF : CONTEXT_DIFF); 315 goto scan_exit; 316 } 317 if ((!diff_type || diff_type == NORMAL_DIFF) && 318 last_line_was_command && 319 (strnEQ(s, "< ", 2) || strnEQ(s, "> ", 2)) ) { 320 p_start = previous_line; 321 p_sline = p_input_line - 1; 322 p_indent = indent; 323 retval = NORMAL_DIFF; 324 goto scan_exit; 325 } 326 } 327 scan_exit: 328 if (no_filearg) { 329 if (indtmp != NULL) 330 indname = fetchname(indtmp, 331 strippath, 332 ok_to_create_file); 333 if (oldtmp != NULL) { 334 oldname = fetchname(oldtmp, 335 strippath, 336 ok_to_create_file); 337 old_file_is_dev_null = filename_is_dev_null; 338 } 339 if (newtmp != NULL) 340 newname = fetchname(newtmp, 341 strippath, 342 ok_to_create_file); 343 if (oldname && newname) { 344 if (strlen(oldname) < strlen(newname)) 345 filearg[0] = xstrdup(oldname); 346 else 347 filearg[0] = xstrdup(newname); 348 } 349 else if (oldname) 350 filearg[0] = xstrdup(oldname); 351 else if (newname) 352 filearg[0] = xstrdup(newname); 353 else if (indname) 354 filearg[0] = xstrdup(indname); 355 } 356 if (bestguess) { 357 free(bestguess); 358 bestguess = NULL; 359 } 360 if (filearg[0] != NULL) 361 bestguess = xstrdup(filearg[0]); 362 else if (indtmp != NULL) 363 bestguess = fetchname(indtmp, strippath, TRUE); 364 else { 365 if (oldtmp != NULL) { 366 oldname = fetchname(oldtmp, strippath, TRUE); 367 old_file_is_dev_null = filename_is_dev_null; 368 } 369 if (newtmp != NULL) 370 newname = fetchname(newtmp, strippath, TRUE); 371 if (oldname && newname) { 372 if (strlen(oldname) < strlen(newname)) 373 bestguess = savestr(oldname); 374 else 375 bestguess = savestr(newname); 376 } 377 else if (oldname) 378 bestguess = savestr(oldname); 379 else if (newname) 380 bestguess = savestr(newname); 381 } 382 if (indtmp != NULL) 383 free(indtmp); 384 if (oldtmp != NULL) 385 free(oldtmp); 386 if (newtmp != NULL) 387 free(newtmp); 388 if (indname != NULL) 389 free(indname); 390 if (oldname != NULL) 391 free(oldname); 392 if (newname != NULL) 393 free(newname); 394 return retval; 395 } 396 397 /* 398 * Remember where this patch ends so we know where to start up again. 399 */ 400 void 401 next_intuit_at(long file_pos, long file_line) 402 { 403 p_base = file_pos; 404 p_bline = file_line; 405 } 406 407 /* 408 * Basically a verbose fseek() to the actual diff listing. 409 */ 410 void 411 skip_to(long file_pos, long file_line) 412 { 413 char *ret; 414 415 assert(p_base <= file_pos); 416 if (verbose && p_base < file_pos) { 417 Fseek(pfp, p_base, 0); 418 say("The text leading up to this was:\n--------------------------\n"); 419 while (ftell(pfp) < file_pos) { 420 ret = fgets(buf, sizeof buf, pfp); 421 assert(ret != NULL); 422 say("|%s", buf); 423 } 424 say("--------------------------\n"); 425 } 426 else 427 Fseek(pfp, file_pos, 0); 428 p_input_line = file_line - 1; 429 } 430 431 /* 432 * Make this a function for better debugging. 433 */ 434 static void 435 malformed(void) 436 { 437 fatal("malformed patch at line %ld: %s", p_input_line, buf); 438 /* about as informative as "Syntax error" in C */ 439 } 440 441 /* 442 * True if there is more of the current diff listing to process. 443 */ 444 bool 445 another_hunk(void) 446 { 447 char *s; 448 char *ret; 449 int context = 0; 450 451 while (p_end >= 0) { 452 if (p_end == p_efake) 453 p_end = p_bfake; /* don't free twice */ 454 else 455 free(p_line[p_end]); 456 p_end--; 457 } 458 assert(p_end == -1); 459 p_efake = -1; 460 461 p_max = hunkmax; /* gets reduced when --- found */ 462 if (diff_type == CONTEXT_DIFF || diff_type == NEW_CONTEXT_DIFF) { 463 long line_beginning = ftell(pfp); 464 /* file pos of the current line */ 465 LINENUM repl_beginning = 0; /* index of --- line */ 466 LINENUM fillcnt = 0; /* #lines of missing ptrn or repl */ 467 LINENUM fillsrc = 0; /* index of first line to copy */ 468 LINENUM filldst = 0; /* index of first missing line */ 469 bool ptrn_spaces_eaten = FALSE; /* ptrn was slightly misformed */ 470 bool repl_could_be_missing = TRUE; 471 /* no + or ! lines in this hunk */ 472 bool repl_missing = FALSE; /* we are now backtracking */ 473 long repl_backtrack_position = 0; 474 /* file pos of first repl line */ 475 LINENUM repl_patch_line = 0; /* input line number for same */ 476 LINENUM ptrn_copiable = 0; /* # of copiable lines in ptrn */ 477 478 ret = pgets(buf, sizeof buf, pfp); 479 p_input_line++; 480 if (ret == NULL || strnNE(buf, "********", 8)) { 481 next_intuit_at(line_beginning,p_input_line); 482 return FALSE; 483 } 484 p_context = 100; 485 p_hunk_beg = p_input_line + 1; 486 while (p_end < p_max) { 487 line_beginning = ftell(pfp); 488 ret = pgets(buf, sizeof buf, pfp); 489 p_input_line++; 490 if (ret == NULL) { 491 if (p_max - p_end < 4) 492 Strcpy(buf, " \n"); /* assume blank lines got chopped */ 493 else { 494 if (repl_beginning && repl_could_be_missing) { 495 repl_missing = TRUE; 496 goto hunk_done; 497 } 498 fatal("unexpected end of file in patch\n"); 499 } 500 } 501 p_end++; 502 assert(p_end < hunkmax); 503 p_char[p_end] = *buf; 504 p_line[p_end] = NULL; 505 switch (*buf) { 506 case '*': 507 if (strnEQ(buf, "********", 8)) { 508 if (repl_beginning && repl_could_be_missing) { 509 repl_missing = TRUE; 510 goto hunk_done; 511 } 512 else 513 fatal("unexpected end of hunk at line %ld\n", 514 p_input_line); 515 } 516 if (p_end != 0) { 517 if (repl_beginning && repl_could_be_missing) { 518 repl_missing = TRUE; 519 goto hunk_done; 520 } 521 fatal("unexpected *** at line %ld: %s", p_input_line, buf); 522 } 523 context = 0; 524 p_line[p_end] = savestr(buf); 525 if (out_of_mem) { 526 p_end--; 527 return FALSE; 528 } 529 for (s=buf; *s && !isdigit((unsigned char)*s); s++) ; 530 if (!*s) 531 malformed (); 532 if (strnEQ(s,"0,0",3)) 533 strcpy(s,s+2); 534 p_first = atol(s); 535 while (isdigit((unsigned char)*s)) s++; 536 if (*s == ',') { 537 for (; *s && !isdigit((unsigned char)*s); s++) ; 538 if (!*s) 539 malformed (); 540 p_ptrn_lines = atol(s) - p_first + 1; 541 } 542 else if (p_first) 543 p_ptrn_lines = 1; 544 else { 545 p_ptrn_lines = 0; 546 p_first = 1; 547 } 548 p_max = p_ptrn_lines + 6; /* we need this much at least */ 549 while (p_max >= hunkmax) 550 grow_hunkmax(); 551 p_max = hunkmax; 552 break; 553 case '-': 554 if (buf[1] == '-') { 555 if (repl_beginning || 556 (p_end != p_ptrn_lines + 1 + (p_char[p_end-1] == '\n'))) 557 { 558 if (p_end == 1) { 559 /* `old' lines were omitted - set up to fill */ 560 /* them in from 'new' context lines. */ 561 p_end = p_ptrn_lines + 1; 562 fillsrc = p_end + 1; 563 filldst = 1; 564 fillcnt = p_ptrn_lines; 565 } 566 else { 567 if (repl_beginning) { 568 if (repl_could_be_missing){ 569 repl_missing = TRUE; 570 goto hunk_done; 571 } 572 fatal( 573 "duplicate \"---\" at line %ld--check line numbers at line %ld\n", 574 p_input_line, p_hunk_beg + repl_beginning); 575 } 576 else { 577 fatal( 578 "%s \"---\" at line %ld--check line numbers at line %ld\n", 579 (p_end <= p_ptrn_lines 580 ? "Premature" 581 : "Overdue" ), 582 p_input_line, p_hunk_beg); 583 } 584 } 585 } 586 repl_beginning = p_end; 587 repl_backtrack_position = ftell(pfp); 588 repl_patch_line = p_input_line; 589 p_line[p_end] = savestr(buf); 590 if (out_of_mem) { 591 p_end--; 592 return FALSE; 593 } 594 p_char[p_end] = '='; 595 for (s=buf; *s && !isdigit((unsigned char)*s); s++) ; 596 if (!*s) 597 malformed (); 598 p_newfirst = atol(s); 599 while (isdigit((unsigned char)*s)) s++; 600 if (*s == ',') { 601 for (; *s && !isdigit((unsigned char)*s); s++) ; 602 if (!*s) 603 malformed (); 604 p_repl_lines = atol(s) - p_newfirst + 1; 605 } 606 else if (p_newfirst) 607 p_repl_lines = 1; 608 else { 609 p_repl_lines = 0; 610 p_newfirst = 1; 611 } 612 p_max = p_repl_lines + p_end; 613 if (p_max > MAXHUNKSIZE) 614 fatal("hunk too large (%ld lines) at line %ld: %s", 615 p_max, p_input_line, buf); 616 while (p_max >= hunkmax) 617 grow_hunkmax(); 618 if (p_repl_lines != ptrn_copiable 619 && (p_context != 0 || p_repl_lines != 1)) 620 repl_could_be_missing = FALSE; 621 break; 622 } 623 goto change_line; 624 case '+': case '!': 625 repl_could_be_missing = FALSE; 626 change_line: 627 if (buf[1] == '\n' && canonicalize) 628 strcpy(buf+1," \n"); 629 if (!isspace((unsigned char)buf[1]) && buf[1] != '>' && buf[1] != '<' && 630 repl_beginning && repl_could_be_missing) { 631 repl_missing = TRUE; 632 goto hunk_done; 633 } 634 if (context >= 0) { 635 if (context < p_context) 636 p_context = context; 637 context = -1000; 638 } 639 p_line[p_end] = savestr(buf+2); 640 if (out_of_mem) { 641 p_end--; 642 return FALSE; 643 } 644 break; 645 case '\t': case '\n': /* assume the 2 spaces got eaten */ 646 if (repl_beginning && repl_could_be_missing && 647 (!ptrn_spaces_eaten || diff_type == NEW_CONTEXT_DIFF) ) { 648 repl_missing = TRUE; 649 goto hunk_done; 650 } 651 p_line[p_end] = savestr(buf); 652 if (out_of_mem) { 653 p_end--; 654 return FALSE; 655 } 656 if (p_end != p_ptrn_lines + 1) { 657 ptrn_spaces_eaten |= (repl_beginning != 0); 658 context++; 659 if (!repl_beginning) 660 ptrn_copiable++; 661 p_char[p_end] = ' '; 662 } 663 break; 664 case ' ': 665 if (!isspace((unsigned char)buf[1]) && 666 repl_beginning && repl_could_be_missing) { 667 repl_missing = TRUE; 668 goto hunk_done; 669 } 670 context++; 671 if (!repl_beginning) 672 ptrn_copiable++; 673 p_line[p_end] = savestr(buf+2); 674 if (out_of_mem) { 675 p_end--; 676 return FALSE; 677 } 678 break; 679 default: 680 if (repl_beginning && repl_could_be_missing) { 681 repl_missing = TRUE; 682 goto hunk_done; 683 } 684 malformed (); 685 } 686 /* set up p_len for strncmp() so we don't have to */ 687 /* assume null termination */ 688 if (p_line[p_end]) 689 p_len[p_end] = strlen(p_line[p_end]); 690 else 691 p_len[p_end] = 0; 692 } 693 694 hunk_done: 695 if (p_end >=0 && !repl_beginning) 696 fatal("no --- found in patch at line %ld\n", pch_hunk_beg()); 697 698 if (repl_missing) { 699 700 /* reset state back to just after --- */ 701 p_input_line = repl_patch_line; 702 for (p_end--; p_end > repl_beginning; p_end--) 703 free(p_line[p_end]); 704 Fseek(pfp, repl_backtrack_position, 0); 705 706 /* redundant 'new' context lines were omitted - set */ 707 /* up to fill them in from the old file context */ 708 if (!p_context && p_repl_lines == 1) { 709 p_repl_lines = 0; 710 p_max--; 711 } 712 fillsrc = 1; 713 filldst = repl_beginning+1; 714 fillcnt = p_repl_lines; 715 p_end = p_max; 716 } 717 else if (!p_context && fillcnt == 1) { 718 /* the first hunk was a null hunk with no context */ 719 /* and we were expecting one line -- fix it up. */ 720 while (filldst < p_end) { 721 p_line[filldst] = p_line[filldst+1]; 722 p_char[filldst] = p_char[filldst+1]; 723 p_len[filldst] = p_len[filldst+1]; 724 filldst++; 725 } 726 #if 0 727 repl_beginning--; /* this doesn't need to be fixed */ 728 #endif 729 p_end--; 730 p_first++; /* do append rather than insert */ 731 fillcnt = 0; 732 p_ptrn_lines = 0; 733 } 734 735 if (diff_type == CONTEXT_DIFF && 736 (fillcnt || (p_first > 1 && ptrn_copiable > 2*p_context)) ) { 737 if (verbose) 738 say("%s\n%s\n%s\n", 739 "(Fascinating--this is really a new-style context diff but without", 740 "the telltale extra asterisks on the *** line that usually indicate", 741 "the new style...)"); 742 diff_type = NEW_CONTEXT_DIFF; 743 } 744 745 /* if there were omitted context lines, fill them in now */ 746 if (fillcnt) { 747 p_bfake = filldst; /* remember where not to free() */ 748 p_efake = filldst + fillcnt - 1; 749 while (fillcnt-- > 0) { 750 while (fillsrc <= p_end && p_char[fillsrc] != ' ') 751 fillsrc++; 752 if (fillsrc > p_end) 753 fatal("replacement text or line numbers mangled in hunk at line %ld\n", 754 p_hunk_beg); 755 p_line[filldst] = p_line[fillsrc]; 756 p_char[filldst] = p_char[fillsrc]; 757 p_len[filldst] = p_len[fillsrc]; 758 fillsrc++; filldst++; 759 } 760 while (fillsrc <= p_end && fillsrc != repl_beginning && 761 p_char[fillsrc] != ' ') 762 fillsrc++; 763 #ifdef DEBUGGING 764 if (debug & 64) 765 printf("fillsrc %ld, filldst %ld, rb %ld, e+1 %ld\n", 766 fillsrc,filldst,repl_beginning,p_end+1); 767 #endif 768 assert(fillsrc==p_end+1 || fillsrc==repl_beginning); 769 assert(filldst==p_end+1 || filldst==repl_beginning); 770 } 771 } 772 else if (diff_type == UNI_DIFF) { 773 long line_beginning = ftell(pfp); 774 /* file pos of the current line */ 775 LINENUM fillsrc; /* index of old lines */ 776 LINENUM filldst; /* index of new lines */ 777 char ch; 778 779 ret = pgets(buf, sizeof buf, pfp); 780 p_input_line++; 781 if (ret == NULL || strnNE(buf, "@@ -", 4)) { 782 next_intuit_at(line_beginning,p_input_line); 783 return FALSE; 784 } 785 s = buf+4; 786 if (!*s) 787 malformed (); 788 p_first = atol(s); 789 while (isdigit((unsigned char)*s)) s++; 790 if (*s == ',') { 791 p_ptrn_lines = atol(++s); 792 while (isdigit((unsigned char)*s)) s++; 793 } else 794 p_ptrn_lines = 1; 795 if (*s == ' ') s++; 796 if (*s != '+' || !*++s) 797 malformed (); 798 p_newfirst = atol(s); 799 while (isdigit((unsigned char)*s)) s++; 800 if (*s == ',') { 801 p_repl_lines = atol(++s); 802 while (isdigit((unsigned char)*s)) s++; 803 } else 804 p_repl_lines = 1; 805 if (*s == ' ') s++; 806 if (*s != '@') 807 malformed (); 808 if (!p_ptrn_lines) 809 p_first++; /* do append rather than insert */ 810 p_max = p_ptrn_lines + p_repl_lines + 1; 811 while (p_max >= hunkmax) 812 grow_hunkmax(); 813 fillsrc = 1; 814 filldst = fillsrc + p_ptrn_lines; 815 p_end = filldst + p_repl_lines; 816 Sprintf(buf,"*** %ld,%ld ****\n",p_first,p_first + p_ptrn_lines - 1); 817 p_line[0] = savestr(buf); 818 if (out_of_mem) { 819 p_end = -1; 820 return FALSE; 821 } 822 p_char[0] = '*'; 823 Sprintf(buf,"--- %ld,%ld ----\n",p_newfirst,p_newfirst+p_repl_lines-1); 824 p_line[filldst] = savestr(buf); 825 if (out_of_mem) { 826 p_end = 0; 827 return FALSE; 828 } 829 p_char[filldst++] = '='; 830 p_context = 100; 831 context = 0; 832 p_hunk_beg = p_input_line + 1; 833 while (fillsrc <= p_ptrn_lines || filldst <= p_end) { 834 line_beginning = ftell(pfp); 835 ret = pgets(buf, sizeof buf, pfp); 836 p_input_line++; 837 if (ret == NULL) { 838 if (p_max - filldst < 3) 839 Strcpy(buf, " \n"); /* assume blank lines got chopped */ 840 else { 841 fatal("unexpected end of file in patch\n"); 842 } 843 } 844 if (*buf == '\t' || *buf == '\n') { 845 ch = ' '; /* assume the space got eaten */ 846 s = savestr(buf); 847 } 848 else { 849 ch = *buf; 850 s = savestr(buf+1); 851 } 852 if (out_of_mem) { 853 while (--filldst > p_ptrn_lines) 854 free(p_line[filldst]); 855 p_end = fillsrc-1; 856 return FALSE; 857 } 858 switch (ch) { 859 case '-': 860 if (fillsrc > p_ptrn_lines) { 861 free(s); 862 p_end = filldst-1; 863 malformed (); 864 } 865 p_char[fillsrc] = ch; 866 p_line[fillsrc] = s; 867 p_len[fillsrc++] = strlen(s); 868 break; 869 case '=': 870 ch = ' '; 871 /* FALLTHROUGH */ 872 case ' ': 873 if (fillsrc > p_ptrn_lines) { 874 free(s); 875 while (--filldst > p_ptrn_lines) 876 free(p_line[filldst]); 877 p_end = fillsrc-1; 878 malformed (); 879 } 880 context++; 881 p_char[fillsrc] = ch; 882 p_line[fillsrc] = s; 883 p_len[fillsrc++] = strlen(s); 884 s = savestr(s); 885 if (out_of_mem) { 886 while (--filldst > p_ptrn_lines) 887 free(p_line[filldst]); 888 p_end = fillsrc-1; 889 return FALSE; 890 } 891 /* FALLTHROUGH */ 892 case '+': 893 if (filldst > p_end) { 894 free(s); 895 while (--filldst > p_ptrn_lines) 896 free(p_line[filldst]); 897 p_end = fillsrc-1; 898 malformed (); 899 } 900 p_char[filldst] = ch; 901 p_line[filldst] = s; 902 p_len[filldst++] = strlen(s); 903 break; 904 default: 905 p_end = filldst; 906 malformed (); 907 } 908 if (ch != ' ' && context > 0) { 909 if (context < p_context) 910 p_context = context; 911 context = -1000; 912 } 913 }/* while */ 914 } 915 else { /* normal diff--fake it up */ 916 char hunk_type; 917 int i; 918 LINENUM min, max; 919 long line_beginning = ftell(pfp); 920 921 p_context = 0; 922 ret = pgets(buf, sizeof buf, pfp); 923 p_input_line++; 924 if (ret == NULL || !isdigit((unsigned char)*buf)) { 925 next_intuit_at(line_beginning,p_input_line); 926 return FALSE; 927 } 928 p_first = atol(buf); 929 for (s=buf; isdigit((unsigned char)*s); s++) ; 930 if (*s == ',') { 931 p_ptrn_lines = atol(++s) - p_first + 1; 932 while (isdigit((unsigned char)*s)) s++; 933 } 934 else 935 p_ptrn_lines = (*s != 'a'); 936 hunk_type = *s; 937 if (hunk_type == 'a') 938 p_first++; /* do append rather than insert */ 939 min = atol(++s); 940 for (; isdigit((unsigned char)*s); s++) ; 941 if (*s == ',') 942 max = atol(++s); 943 else 944 max = min; 945 if (hunk_type == 'd') 946 min++; 947 p_end = p_ptrn_lines + 1 + max - min + 1; 948 if (p_end > MAXHUNKSIZE) 949 fatal("hunk too large (%ld lines) at line %ld: %s", 950 p_end, p_input_line, buf); 951 while (p_end >= hunkmax) 952 grow_hunkmax(); 953 p_newfirst = min; 954 p_repl_lines = max - min + 1; 955 Sprintf(buf, "*** %ld,%ld\n", p_first, p_first + p_ptrn_lines - 1); 956 p_line[0] = savestr(buf); 957 if (out_of_mem) { 958 p_end = -1; 959 return FALSE; 960 } 961 p_char[0] = '*'; 962 for (i=1; i<=p_ptrn_lines; i++) { 963 ret = pgets(buf, sizeof buf, pfp); 964 p_input_line++; 965 if (ret == NULL) 966 fatal("unexpected end of file in patch at line %ld\n", 967 p_input_line); 968 if (*buf != '<') 969 fatal("< expected at line %ld of patch\n", p_input_line); 970 p_line[i] = savestr(buf+2); 971 if (out_of_mem) { 972 p_end = i-1; 973 return FALSE; 974 } 975 p_len[i] = strlen(p_line[i]); 976 p_char[i] = '-'; 977 } 978 if (hunk_type == 'c') { 979 ret = pgets(buf, sizeof buf, pfp); 980 p_input_line++; 981 if (ret == NULL) 982 fatal("unexpected end of file in patch at line %ld\n", 983 p_input_line); 984 if (*buf != '-') 985 fatal("--- expected at line %ld of patch\n", p_input_line); 986 } 987 Sprintf(buf, "--- %ld,%ld\n", min, max); 988 p_line[i] = savestr(buf); 989 if (out_of_mem) { 990 p_end = i-1; 991 return FALSE; 992 } 993 p_char[i] = '='; 994 for (i++; i<=p_end; i++) { 995 ret = pgets(buf, sizeof buf, pfp); 996 p_input_line++; 997 if (ret == NULL) 998 fatal("unexpected end of file in patch at line %ld\n", 999 p_input_line); 1000 if (*buf != '>') 1001 fatal("> expected at line %ld of patch\n", p_input_line); 1002 p_line[i] = savestr(buf+2); 1003 if (out_of_mem) { 1004 p_end = i-1; 1005 return FALSE; 1006 } 1007 p_len[i] = strlen(p_line[i]); 1008 p_char[i] = '+'; 1009 } 1010 } 1011 if (reverse) /* backwards patch? */ 1012 if (!pch_swap()) 1013 say("Not enough memory to swap next hunk!\n"); 1014 #ifdef DEBUGGING 1015 if (debug & 2) { 1016 int i; 1017 char special; 1018 1019 for (i=0; i <= p_end; i++) { 1020 if (i == p_ptrn_lines) 1021 special = '^'; 1022 else 1023 special = ' '; 1024 fprintf(stderr, "%3d %c %c %s", i, p_char[i], special, p_line[i]); 1025 Fflush(stderr); 1026 } 1027 } 1028 #endif 1029 if (p_end+1 < hunkmax) /* paranoia reigns supreme... */ 1030 p_char[p_end+1] = '^'; /* add a stopper for apply_hunk */ 1031 return TRUE; 1032 } 1033 1034 /* 1035 * Input a line from the patch file, worrying about indentation. 1036 */ 1037 char * 1038 pgets(char *bf, int sz, FILE *fp) 1039 { 1040 char *ret = fgets(bf, sz, fp); 1041 char *s; 1042 int indent = 0; 1043 1044 if (p_indent && ret != NULL) { 1045 for (s=buf; 1046 indent < p_indent && 1047 (*s == ' ' || *s == '\t' || *s == 'X'); 1048 s++) { 1049 if (*s == '\t') 1050 indent += 8 - (indent % 7); 1051 else 1052 indent++; 1053 } 1054 if (buf != s) 1055 Strcpy(buf, s); 1056 } 1057 return ret; 1058 } 1059 1060 /* 1061 * Reverse the old and new portions of the current hunk. 1062 */ 1063 bool 1064 pch_swap(void) 1065 { 1066 char **tp_line; /* the text of the hunk */ 1067 short *tp_len; /* length of each line */ 1068 char *tp_char; /* +, -, and ! */ 1069 LINENUM i; 1070 LINENUM n; 1071 bool blankline = FALSE; 1072 char *s; 1073 1074 i = p_first; 1075 p_first = p_newfirst; 1076 p_newfirst = i; 1077 1078 /* make a scratch copy */ 1079 1080 tp_line = p_line; 1081 tp_len = p_len; 1082 tp_char = p_char; 1083 p_line = NULL; /* force set_hunkmax to allocate again */ 1084 p_len = NULL; 1085 p_char = NULL; 1086 set_hunkmax(); 1087 if (p_line == NULL || p_len == NULL || p_char == NULL) { 1088 if (p_line == NULL) 1089 free(p_line); 1090 p_line = tp_line; 1091 if (p_len == NULL) 1092 free(p_len); 1093 p_len = tp_len; 1094 if (p_char == NULL) 1095 free(p_char); 1096 p_char = tp_char; 1097 return FALSE; /* not enough memory to swap hunk! */ 1098 } 1099 1100 /* now turn the new into the old */ 1101 1102 i = p_ptrn_lines + 1; 1103 if (tp_char[i] == '\n') { /* account for possible blank line */ 1104 blankline = TRUE; 1105 i++; 1106 } 1107 if (p_efake >= 0) { /* fix non-freeable ptr range */ 1108 if (p_efake <= i) 1109 n = p_end - i + 1; 1110 else 1111 n = -i; 1112 p_efake += n; 1113 p_bfake += n; 1114 } 1115 for (n=0; i <= p_end; i++,n++) { 1116 p_line[n] = tp_line[i]; 1117 p_char[n] = tp_char[i]; 1118 if (p_char[n] == '+') 1119 p_char[n] = '-'; 1120 p_len[n] = tp_len[i]; 1121 } 1122 if (blankline) { 1123 i = p_ptrn_lines + 1; 1124 p_line[n] = tp_line[i]; 1125 p_char[n] = tp_char[i]; 1126 p_len[n] = tp_len[i]; 1127 n++; 1128 } 1129 assert(p_char[0] == '='); 1130 p_char[0] = '*'; 1131 for (s=p_line[0]; *s; s++) 1132 if (*s == '-') 1133 *s = '*'; 1134 1135 /* now turn the old into the new */ 1136 1137 assert(tp_char[0] == '*'); 1138 tp_char[0] = '='; 1139 for (s=tp_line[0]; *s; s++) 1140 if (*s == '*') 1141 *s = '-'; 1142 for (i=0; n <= p_end; i++,n++) { 1143 p_line[n] = tp_line[i]; 1144 p_char[n] = tp_char[i]; 1145 if (p_char[n] == '-') 1146 p_char[n] = '+'; 1147 p_len[n] = tp_len[i]; 1148 } 1149 assert(i == p_ptrn_lines + 1); 1150 i = p_ptrn_lines; 1151 p_ptrn_lines = p_repl_lines; 1152 p_repl_lines = i; 1153 if (tp_line == NULL) 1154 free(tp_line); 1155 if (tp_len == NULL) 1156 free(tp_len); 1157 if (tp_char == NULL) 1158 free(tp_char); 1159 return TRUE; 1160 } 1161 1162 /* 1163 * Return the specified line position in the old file of the old context. 1164 */ 1165 LINENUM 1166 pch_first(void) 1167 { 1168 return p_first; 1169 } 1170 1171 /* 1172 * Return the number of lines of old context. 1173 */ 1174 LINENUM 1175 pch_ptrn_lines(void) 1176 { 1177 return p_ptrn_lines; 1178 } 1179 1180 /* 1181 * Return the probable line position in the new file of the first line. 1182 */ 1183 LINENUM 1184 pch_newfirst(void) 1185 { 1186 return p_newfirst; 1187 } 1188 1189 /* 1190 * Return the number of lines in the replacement text including context. 1191 */ 1192 LINENUM 1193 pch_repl_lines(void) 1194 { 1195 return p_repl_lines; 1196 } 1197 1198 /* 1199 * Return the number of lines in the whole hunk. 1200 */ 1201 LINENUM 1202 pch_end(void) 1203 { 1204 return p_end; 1205 } 1206 1207 /* 1208 * Return the number of context lines before the first changed line. 1209 */ 1210 LINENUM 1211 pch_context(void) 1212 { 1213 return p_context; 1214 } 1215 1216 /* 1217 * Return the length of a particular patch line. 1218 */ 1219 short 1220 pch_line_len(LINENUM line) 1221 { 1222 return p_len[line]; 1223 } 1224 1225 /* 1226 * Return the control character (+, -, *, !, etc) for a patch line. 1227 */ 1228 char 1229 pch_char(LINENUM line) 1230 { 1231 return p_char[line]; 1232 } 1233 1234 /* 1235 * Return a pointer to a particular patch line. 1236 */ 1237 char * 1238 pfetch(LINENUM line) 1239 { 1240 return p_line[line]; 1241 } 1242 1243 /* 1244 * Return where in the patch file this hunk began, for error messages. 1245 */ 1246 LINENUM 1247 pch_hunk_beg(void) 1248 { 1249 return p_hunk_beg; 1250 } 1251 1252 /* 1253 * Apply an ed script by feeding ed itself. 1254 */ 1255 void 1256 do_ed_script(void) 1257 { 1258 char *t; 1259 long beginning_of_this_line; 1260 bool this_line_is_command = FALSE; 1261 FILE *pipefp = NULL; 1262 1263 if (!skip_rest_of_patch) { 1264 Unlink(TMPOUTNAME); 1265 copy_file(filearg[0], TMPOUTNAME); 1266 if (verbose) 1267 Sprintf(buf, "/bin/ed %s", TMPOUTNAME); 1268 else 1269 Sprintf(buf, "/bin/ed - %s", TMPOUTNAME); 1270 pipefp = popen(buf, "w"); 1271 } 1272 for (;;) { 1273 beginning_of_this_line = ftell(pfp); 1274 if (pgets(buf, sizeof buf, pfp) == NULL) { 1275 next_intuit_at(beginning_of_this_line,p_input_line); 1276 break; 1277 } 1278 p_input_line++; 1279 for (t=buf; isdigit((unsigned char)*t) || *t == ','; t++) ; 1280 this_line_is_command = (isdigit((unsigned char)*buf) && 1281 (*t == 'd' || *t == 'c' || *t == 'a')); 1282 if (this_line_is_command) { 1283 if (!skip_rest_of_patch) 1284 fputs(buf, pipefp); 1285 if (*t != 'd') { 1286 while (pgets(buf, sizeof buf, pfp) != NULL) { 1287 p_input_line++; 1288 if (!skip_rest_of_patch) 1289 fputs(buf, pipefp); 1290 if (strEQ(buf, ".\n")) 1291 break; 1292 } 1293 } 1294 } 1295 else { 1296 next_intuit_at(beginning_of_this_line,p_input_line); 1297 break; 1298 } 1299 } 1300 if (skip_rest_of_patch) 1301 return; 1302 fprintf(pipefp, "w\n"); 1303 fprintf(pipefp, "q\n"); 1304 Fflush(pipefp); 1305 Pclose(pipefp); 1306 ignore_signals(); 1307 if (move_file(TMPOUTNAME, outname) < 0) { 1308 toutkeep = TRUE; 1309 chmod(TMPOUTNAME, filemode); 1310 } 1311 else 1312 chmod(outname, filemode); 1313 set_signals(1); 1314 } 1315