| 1 | /************************************************ |
| 2 | * PH-Compare * |
| 3 | ************************************************/ |
| 4 | |
| 5 | /* A program to compare two files line by line. |
| 6 | |
| 7 | History: |
| 8 | |
| 9 | It was originally written in C, but the C under |
| 10 | Panos is still a shambles (1986). Translated therefore |
| 11 | to BCPL -- this explains some of the odd style. |
| 12 | |
| 13 | Modified to run on Archimedes, August 1987. |
| 14 | Modified to run under MSDOS, March 1989. |
| 15 | Modified to run under CINTERP interpreter, July 1989. |
| 16 | Modified to run under Unix, October 1989. |
| 17 | |
| 18 | Translated back into C, March 1990! */ |
| 19 | |
| 20 | /* Copyright (c) 1986, 1987, 1989, 1990, 1994, 2001 by Philip Hazel */ |
| 21 | |
| 22 | /* Previously modified: October 1994*/ |
| 23 | /* Last modified: September 2001 - a long-lived bug fixed! */ |
| 24 | |
| 25 | |
| 26 | #include <stdio.h> |
| 27 | #include <errno.h> |
| 28 | |
| 29 | #ifdef __STDC__ |
| 30 | #include <string.h> |
| 31 | #include <stdlib.h> |
| 32 | #include <stdint.h> |
| 33 | #endif |
| 34 | |
| 35 | #ifndef intptr_t |
| 36 | # define intptr_t long long int |
| 37 | #endif |
| 38 | |
| 39 | /* ----- parameters ----- */ |
| 40 | |
| 41 | #define version 8 |
| 42 | #define defaultstore 100000 /* default recovery buffer size */ |
| 43 | #define minstore 500 /* minimum recovery buffer size */ |
| 44 | |
| 45 | /* ----- misc defines ----- */ |
| 46 | |
| 47 | #define FALSE 0 |
| 48 | #define TRUE 1 |
| 49 | |
| 50 | #ifdef __STDC__ |
| 51 | #define pvoid void |
| 52 | #else |
| 53 | #define pvoid |
| 54 | #endif |
| 55 | |
| 56 | #define EqString(s, t) (strcmp(s, t) == 0) |
| 57 | |
| 58 | /* ----- line structure ----- */ |
| 59 | |
| 60 | typedef struct line { |
| 61 | struct line *next; |
| 62 | int number; |
| 63 | char text[999999]; |
| 64 | } line; |
| 65 | |
| 66 | |
| 67 | /* ----- global variables ----- */ |
| 68 | |
| 69 | FILE *f_one; /* files */ |
| 70 | FILE *f_two; |
| 71 | FILE *f_out; |
| 72 | |
| 73 | int lines_one = 0; /* line counts */ |
| 74 | int lines_two = 0; |
| 75 | int return_code = 0; |
| 76 | int eof_one = FALSE; /* eof flags */ |
| 77 | int eof_two = FALSE; |
| 78 | int exact = FALSE; /* TRUE => no strip spaces */ |
| 79 | int echo = TRUE; /* TRUE => show mismatched lines */ |
| 80 | int sync_count = 3; /* resync count */ |
| 81 | int storesize = defaultstore; /* size of each buffer */ |
| 82 | |
| 83 | char *name_one = NULL; /* file names */ |
| 84 | char *name_two = NULL; |
| 85 | char *to_name = NULL; |
| 86 | |
| 87 | char *bufbase_one; /* start buffer */ |
| 88 | char *bufbase_two; |
| 89 | char *bufnext_one; /* next free byte */ |
| 90 | char *bufnext_two; |
| 91 | char *buftop_one; /* end buffer */ |
| 92 | char *buftop_two; |
| 93 | |
| 94 | line *rootline_one; /* mis-match point */ |
| 95 | line *rootline_two; |
| 96 | line *lastline_one; /* last in store */ |
| 97 | line *lastline_two; |
| 98 | line *pline_one; /* working line */ |
| 99 | line *pline_two; |
| 100 | |
| 101 | |
| 102 | /************************************************* |
| 103 | * Help Information * |
| 104 | *************************************************/ |
| 105 | |
| 106 | void givehelp(pvoid) |
| 107 | { |
| 108 | printf("PH's CMP v%d\n", version); |
| 109 | printf("Keywords:\n"); |
| 110 | printf(" <file> ) files to compare\n"); |
| 111 | printf(" <file> ) no keywords used\n"); |
| 112 | printf("-to <file> output destination\n"); |
| 113 | printf("-exact include trailing spaces & match tabs\n"); |
| 114 | printf("-noecho don't echo differences (just give line numbers)\n"); |
| 115 | printf("-s, -sync <n> set re-sync count, default 3\n"); |
| 116 | printf("-buffer <n> buffer size (for each file) default 100000\n"); |
| 117 | printf("-id give program version id\n"); |
| 118 | printf("-h, -help give this help\n"); |
| 119 | printf("\nExamples:\n"); |
| 120 | printf("cmp old.f77 new.f77\n"); |
| 121 | printf("cmp first second -noecho -sync 1\n"); |
| 122 | printf("cmp large1 large2 -buffer 200000 -noecho -to diffs\n"); |
| 123 | } |
| 124 | |
| 125 | |
| 126 | |
| 127 | /************************************************ |
| 128 | * Errors -- all serious * |
| 129 | ************************************************/ |
| 130 | |
| 131 | void moan(code, text) |
| 132 | int code; |
| 133 | char *text; |
| 134 | { |
| 135 | fprintf(stderr, "\n** "); |
| 136 | switch (code) |
| 137 | { |
| 138 | case 1: |
| 139 | fprintf(stderr, "Unable to open file \"%s\"", text); |
| 140 | if (errno) |
| 141 | { |
| 142 | fprintf(stderr, " - "); |
| 143 | perror(NULL); |
| 144 | } |
| 145 | else fprintf(stderr, "\n"); |
| 146 | break; |
| 147 | |
| 148 | case 2: |
| 149 | fprintf(stderr, "Buffer overflow for file \"%s\"\n", text); |
| 150 | break; |
| 151 | |
| 152 | case 3: |
| 153 | fprintf(stderr, "Two file names must be given\n"); |
| 154 | break; |
| 155 | |
| 156 | default: |
| 157 | fprintf(stderr, "Unknown error %d\n", code); |
| 158 | break; |
| 159 | } |
| 160 | |
| 161 | fprintf(stderr, "** CMP abandoned\n"); |
| 162 | exit(99); |
| 163 | } |
| 164 | |
| 165 | |
| 166 | |
| 167 | /************************************************* |
| 168 | * Write line identification * |
| 169 | *************************************************/ |
| 170 | |
| 171 | void write_id(n1, n2, c, name, p1, p2) |
| 172 | int n1, n2, c; |
| 173 | char *name, *p1, *p2; |
| 174 | { |
| 175 | if (n2 < 0) n2 = -n2; |
| 176 | n2 -= 1; |
| 177 | fprintf(f_out, "%cine", c); |
| 178 | if (n1 == n2) fprintf(f_out, " %d of \"%s\"%s", n1, name, p1); |
| 179 | else fprintf(f_out, "s %d-%d of \"%s\"%s", n1, n2, name, p2); |
| 180 | } |
| 181 | |
| 182 | |
| 183 | /************************************************* |
| 184 | * Write sequence of lines * |
| 185 | *************************************************/ |
| 186 | |
| 187 | void write_lines(s, t) |
| 188 | line *s, *t; |
| 189 | { |
| 190 | while (s != t) |
| 191 | { |
| 192 | char *p = s->text; |
| 193 | while (*p != '\n') fputc(*p++, f_out); |
| 194 | fputc('\n', f_out); |
| 195 | s = s->next; |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | |
| 200 | |
| 201 | /************************************************* |
| 202 | * Write separator rule * |
| 203 | *************************************************/ |
| 204 | |
| 205 | void rule(s, l) |
| 206 | int s, l; |
| 207 | { |
| 208 | while (l-- > 0) fprintf(f_out, "%c", s); |
| 209 | fprintf(f_out, "\n"); |
| 210 | } |
| 211 | |
| 212 | |
| 213 | |
| 214 | /************************************************* |
| 215 | * Write message on re-sync or eof * |
| 216 | *************************************************/ |
| 217 | |
| 218 | void write_message(tline_one, tline_two) |
| 219 | line *tline_one, *tline_two; |
| 220 | { |
| 221 | int s1 = rootline_one->number; |
| 222 | int t1 = tline_one->number; |
| 223 | int s2 = rootline_two->number; |
| 224 | int t2 = tline_two->number; |
| 225 | if (echo) rule('=', 15); |
| 226 | |
| 227 | if (s1 == t1) |
| 228 | { |
| 229 | write_id(s2, t2, 'L', name_two, " occurs ", " occur "); |
| 230 | if (s1 < 0) fprintf(f_out, "at the end"); |
| 231 | else fprintf(f_out, "before line %d", s1); |
| 232 | fprintf(f_out, " of \"%s\".\n", name_one); |
| 233 | if (echo) |
| 234 | { |
| 235 | rule('-', 10); |
| 236 | write_lines(rootline_two, tline_two); |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | else if (s2 == t2) |
| 241 | { |
| 242 | write_id(s1, t1, 'L', name_one, " occurs ", " occur "); |
| 243 | if (s2 < 0) fprintf(f_out, "at the end"); |
| 244 | else fprintf(f_out, "before line %d", s2); |
| 245 | fprintf(f_out, " of \"%s\".\n", name_two); |
| 246 | if (echo) |
| 247 | { |
| 248 | rule('-', 10); |
| 249 | write_lines(rootline_one, tline_one); |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | else if (t1 < 0 && t2 < 0) |
| 254 | { |
| 255 | fprintf(f_out, "From line %d of \"%s\" and line %d of \"%s\" ", |
| 256 | rootline_one->number, name_one, rootline_two->number, name_two); |
| 257 | fprintf(f_out, "the files are different.\n"); |
| 258 | if (echo) |
| 259 | { |
| 260 | rule('-', 10); |
| 261 | if (-t1-s1 < 21) write_lines(rootline_one, tline_one); |
| 262 | else fprintf(f_out, "... <more than 20 lines> ...\n"); |
| 263 | rule('-', 10); |
| 264 | if (-t2-s2 < 21) write_lines(rootline_two, tline_two); |
| 265 | else fprintf(f_out, "... <more than 20 lines> ...\n"); |
| 266 | } |
| 267 | } |
| 268 | |
| 269 | else |
| 270 | { |
| 271 | write_id(s1, t1, 'L', name_one, " does ", " do "); |
| 272 | fprintf(f_out, "not match "); |
| 273 | write_id(s2, t2, 'l', name_two, ".\n", ".\n"); |
| 274 | if (echo) |
| 275 | { |
| 276 | rule('-', 10); |
| 277 | write_lines(rootline_one, tline_one); |
| 278 | rule('-', 10); |
| 279 | write_lines(rootline_two, tline_two); |
| 280 | } |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | |
| 285 | |
| 286 | |
| 287 | /************************************************* |
| 288 | * Advance to next line in store * |
| 289 | *************************************************/ |
| 290 | |
| 291 | /* A separate procedure exists for each file, for |
| 292 | simplicity and efficiency. */ |
| 293 | |
| 294 | int nextline_one(pvoid) |
| 295 | { |
| 296 | if (pline_one == NULL || pline_one->next == NULL) return FALSE; |
| 297 | pline_one = pline_one->next; |
| 298 | return TRUE; |
| 299 | } |
| 300 | |
| 301 | int nextline_two(pvoid) |
| 302 | { |
| 303 | if (pline_two == NULL || pline_two->next == NULL) return FALSE; |
| 304 | pline_two = pline_two->next; |
| 305 | return TRUE; |
| 306 | } |
| 307 | |
| 308 | |
| 309 | /************************************************* |
| 310 | * Read a line into store * |
| 311 | *************************************************/ |
| 312 | |
| 313 | /* A separate procedure exists for each file, for |
| 314 | simplicity and efficiency. */ |
| 315 | |
| 316 | void readline_one(pvoid) |
| 317 | { |
| 318 | int count = 0; |
| 319 | int c = fgetc(f_one); |
| 320 | line *nextline = (line *)bufnext_one; |
| 321 | |
| 322 | bufnext_one = nextline->text; |
| 323 | if (bufnext_one >= buftop_one) moan(2, name_one); |
| 324 | |
| 325 | nextline->next = NULL; |
| 326 | |
| 327 | lines_one ++; |
| 328 | if (c == EOF) |
| 329 | { |
| 330 | eof_one = TRUE; |
| 331 | nextline->number = -lines_one; |
| 332 | } |
| 333 | else |
| 334 | { |
| 335 | nextline->number = lines_one; |
| 336 | for (;;) |
| 337 | { |
| 338 | if (c == EOF) c = '\n'; |
| 339 | if (c == '\n') |
| 340 | { |
| 341 | if (!exact) |
| 342 | while (bufnext_one > nextline->text) |
| 343 | { if (bufnext_one[-1] == ' ') bufnext_one--; else break; } |
| 344 | *(bufnext_one++) = '\n'; |
| 345 | if (bufnext_one >= buftop_one) moan(2, name_one); |
| 346 | break; |
| 347 | } |
| 348 | if (c == '\t' && !exact) |
| 349 | do { *(bufnext_one++) = ' '; count++; } while ((count & 7) != 0); |
| 350 | else { *(bufnext_one++) = c; count++; } |
| 351 | if (bufnext_one >= buftop_one) moan(2, name_one); |
| 352 | c = fgetc(f_one); |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | if (lastline_one != NULL) lastline_one->next = nextline; |
| 357 | lastline_one = nextline; |
| 358 | pline_one = nextline; |
| 359 | |
| 360 | bufnext_one = (char *) (((intptr_t)bufnext_one+ sizeof (intptr_t) - 1) & (-(sizeof (intptr_t)))); |
| 361 | } |
| 362 | |
| 363 | |
| 364 | |
| 365 | void readline_two(pvoid) |
| 366 | { |
| 367 | int count = 0; |
| 368 | int c = fgetc(f_two); |
| 369 | line *nextline = (line *)bufnext_two; |
| 370 | |
| 371 | bufnext_two = nextline->text; |
| 372 | if (bufnext_two >= buftop_two) moan(2, name_two); |
| 373 | |
| 374 | nextline->next = NULL; |
| 375 | |
| 376 | lines_two ++; |
| 377 | if (c == EOF) |
| 378 | { |
| 379 | eof_two = TRUE; |
| 380 | nextline->number = -lines_two; |
| 381 | } |
| 382 | else |
| 383 | { |
| 384 | nextline->number = lines_two; |
| 385 | for (;;) |
| 386 | { |
| 387 | if (c == EOF) c = '\n'; |
| 388 | if (c == '\n') |
| 389 | { |
| 390 | if (!exact) |
| 391 | while (bufnext_two > nextline->text) |
| 392 | { if (bufnext_two[-1] == ' ') bufnext_two--; else break; } |
| 393 | *(bufnext_two++) = '\n'; |
| 394 | if (bufnext_two >= buftop_two) moan(2, name_two); |
| 395 | break; |
| 396 | } |
| 397 | if (c == '\t' && !exact) |
| 398 | do { *(bufnext_two++) = ' '; count++; } while ((count & 7) != 0); |
| 399 | else { *(bufnext_two++) = c; count++; } |
| 400 | if (bufnext_two >= buftop_two) moan(2, name_two); |
| 401 | c = fgetc(f_two); |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | if (lastline_two != NULL) lastline_two->next = nextline; |
| 406 | lastline_two = nextline; |
| 407 | pline_two = nextline; |
| 408 | |
| 409 | bufnext_two = (char *) (((intptr_t)bufnext_two+ sizeof (intptr_t) - 1) & (-(sizeof (intptr_t)))); |
| 410 | } |
| 411 | |
| 412 | |
| 413 | |
| 414 | /************************************************** |
| 415 | * Compare two lines * |
| 416 | **************************************************/ |
| 417 | |
| 418 | int compare_lines(a, b) |
| 419 | line *a, *b; |
| 420 | { |
| 421 | int n1 = a->number; |
| 422 | int n2 = b->number; |
| 423 | char *s = a->text; |
| 424 | char *t = b->text; |
| 425 | |
| 426 | if (n1 < 0 && n2 < 0) return TRUE; |
| 427 | if (n1 < 0 || n2 < 0) return FALSE; |
| 428 | |
| 429 | while (*s == *t) |
| 430 | { |
| 431 | if (*s == '\n') return TRUE; |
| 432 | s++; t++; |
| 433 | } |
| 434 | |
| 435 | return FALSE; |
| 436 | } |
| 437 | |
| 438 | |
| 439 | /************************************************* |
| 440 | * Re-synchronizing code * |
| 441 | *************************************************/ |
| 442 | |
| 443 | int resync(pvoid) |
| 444 | { |
| 445 | int i; |
| 446 | int matched = TRUE; |
| 447 | line *tline_one = pline_one; |
| 448 | line *tline_two = pline_two; |
| 449 | |
| 450 | if (eof_one || eof_two) matched = FALSE; else |
| 451 | { |
| 452 | for (i = 1; i < sync_count; i++) |
| 453 | { |
| 454 | if (!nextline_one()) readline_one(); |
| 455 | if (!nextline_two()) readline_two(); |
| 456 | if (!compare_lines(pline_one, pline_two)) { matched = FALSE; break; } |
| 457 | if (eof_one || eof_two) { matched = FALSE; break; } |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | if (matched) write_message(tline_one, tline_two); else |
| 462 | { |
| 463 | pline_one = tline_one; |
| 464 | pline_two = tline_two; |
| 465 | } |
| 466 | |
| 467 | return matched; |
| 468 | } |
| 469 | |
| 470 | |
| 471 | |
| 472 | /************************************************* |
| 473 | * Main compare code * |
| 474 | *************************************************/ |
| 475 | |
| 476 | void compare(pvoid) |
| 477 | { |
| 478 | int matched = TRUE; |
| 479 | |
| 480 | /* Big main loop - exit by return or unmatched at eof */ |
| 481 | |
| 482 | while (matched) |
| 483 | { |
| 484 | /* First minor loop, while in step */ |
| 485 | |
| 486 | while (matched && !eof_one && !eof_two) |
| 487 | { |
| 488 | /* Advance or read next lines */ |
| 489 | |
| 490 | if (!nextline_one()) |
| 491 | { |
| 492 | bufnext_one = bufbase_one; |
| 493 | lastline_one = NULL; |
| 494 | readline_one(); |
| 495 | } |
| 496 | |
| 497 | if (!nextline_two()) |
| 498 | { |
| 499 | bufnext_two = bufbase_two; |
| 500 | lastline_two = NULL; |
| 501 | readline_two(); |
| 502 | } |
| 503 | |
| 504 | /* Compare and check for end of file */ |
| 505 | |
| 506 | matched = compare_lines(pline_one, pline_two); |
| 507 | |
| 508 | } /* End first minor loop */ |
| 509 | |
| 510 | if (matched) return; /* successful end of file */ |
| 511 | |
| 512 | /* There has been a mis-match */ |
| 513 | |
| 514 | return_code++; |
| 515 | rootline_one = pline_one; /* Fail point */ |
| 516 | rootline_two = pline_two; |
| 517 | |
| 518 | /* Second minor loop, trying to regain sync */ |
| 519 | |
| 520 | while (!eof_one || !eof_two) |
| 521 | { |
| 522 | /* Advance one and scan all of two */ |
| 523 | |
| 524 | if (!eof_one) |
| 525 | { |
| 526 | line *zline = pline_two; |
| 527 | if (!nextline_one()) readline_one(); |
| 528 | pline_two = rootline_two; |
| 529 | for (;;) |
| 530 | { |
| 531 | if (compare_lines(pline_one, pline_two)) |
| 532 | { |
| 533 | matched = resync(); |
| 534 | if (matched) break; |
| 535 | } |
| 536 | if (pline_two == zline) break; |
| 537 | pline_two = pline_two->next; |
| 538 | } |
| 539 | if (matched) break; |
| 540 | } |
| 541 | |
| 542 | /* Advance two and scan all of one */ |
| 543 | |
| 544 | if (!eof_two) |
| 545 | { |
| 546 | line *zline = pline_one; |
| 547 | if (!nextline_two()) readline_two(); |
| 548 | pline_one = rootline_one; |
| 549 | for (;;) |
| 550 | { |
| 551 | if (compare_lines(pline_one, pline_two)) |
| 552 | { |
| 553 | matched = resync(); |
| 554 | if (matched) break; |
| 555 | } |
| 556 | if (pline_one == zline) break; |
| 557 | pline_one = pline_one->next; |
| 558 | } |
| 559 | if (matched) break; |
| 560 | } |
| 561 | |
| 562 | } /* End second minor loop */ |
| 563 | |
| 564 | } /* End of major loop */ |
| 565 | |
| 566 | write_message(lastline_one, lastline_two); |
| 567 | } |
| 568 | |
| 569 | |
| 570 | |
| 571 | |
| 572 | /************************************************* |
| 573 | * Entry Point * |
| 574 | *************************************************/ |
| 575 | |
| 576 | int main(argc, argv) |
| 577 | int argc; |
| 578 | char **argv; |
| 579 | { |
| 580 | int argp = 1; |
| 581 | int arg_id = FALSE; |
| 582 | int arg_help = FALSE; |
| 583 | |
| 584 | f_out = stdout; |
| 585 | |
| 586 | /* Scan argument strings */ |
| 587 | |
| 588 | while (argp < argc) |
| 589 | { |
| 590 | char *arg = argv[argp]; |
| 591 | char **lv_name = (name_one == NULL)? &name_one:&name_two; /* default for positional */ |
| 592 | int *lv_value = NULL; |
| 593 | int value = TRUE; |
| 594 | |
| 595 | if (arg[0] == '-') |
| 596 | { /* keyed argument */ |
| 597 | if (EqString(arg,"-help") || EqString(arg, "-h")) |
| 598 | { arg_help = TRUE; value = FALSE; } |
| 599 | else if (EqString(arg, "-id")) |
| 600 | { arg_id = TRUE; value = FALSE; } |
| 601 | else if (EqString(arg, "-exact")) |
| 602 | { exact = TRUE; value = FALSE; } |
| 603 | else if (EqString(arg, "-noecho")) |
| 604 | { echo = FALSE; value = FALSE; } |
| 605 | else if (EqString(arg, "-to")) lv_name = &to_name; |
| 606 | else if (EqString(arg, "-sync") || EqString(arg, "-s")) |
| 607 | lv_value = &sync_count; |
| 608 | else if (EqString(arg, "-buffer")) lv_value = &storesize; |
| 609 | else { printf("Unknown keyword %s\n", arg); exit(99); } |
| 610 | |
| 611 | if (++argp >= argc && value) |
| 612 | { printf("Value for keyword %s missing\n", arg); exit(99); } |
| 613 | } |
| 614 | |
| 615 | /* Deal with keys that take values */ |
| 616 | |
| 617 | if (value) |
| 618 | { |
| 619 | if (lv_value == &sync_count || lv_value == &storesize) |
| 620 | { |
| 621 | int ch; |
| 622 | int i = 0; |
| 623 | char *argval = argv[argp++]; |
| 624 | *lv_value = 0; |
| 625 | while ((ch = argval[i++]) != 0) |
| 626 | { |
| 627 | if ('0' <= ch && ch <= '9') *lv_value = 10*(*lv_value) + ch - '0'; else |
| 628 | { |
| 629 | printf("Number expected after \"%s\" but \"%s\" read\n", |
| 630 | arg, argval); |
| 631 | exit(99); |
| 632 | } |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | else if (*lv_name != NULL) |
| 637 | { |
| 638 | printf("Keyword expected but \"%s\" read", arg); |
| 639 | printf(" - use \"cmp -h\" for help\n"); |
| 640 | exit(99); |
| 641 | } |
| 642 | else *lv_name = argv[argp++]; |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | /* Deal with help and id */ |
| 647 | |
| 648 | if (arg_id && !arg_help) |
| 649 | { |
| 650 | printf("PH's CMP v%d\n", version); |
| 651 | exit(0); |
| 652 | } |
| 653 | |
| 654 | if (arg_help) |
| 655 | { |
| 656 | givehelp(); |
| 657 | exit(0); |
| 658 | } |
| 659 | |
| 660 | /* Deal with file names */ |
| 661 | |
| 662 | if (name_one == NULL || name_two == NULL) moan(3, ""); |
| 663 | |
| 664 | if (to_name != NULL) |
| 665 | { |
| 666 | f_out = fopen(to_name, "w"); |
| 667 | if (f_out == NULL) moan(1, to_name); |
| 668 | } |
| 669 | |
| 670 | /* Further general initialization */ |
| 671 | |
| 672 | if (storesize < minstore) storesize = defaultstore; |
| 673 | f_one = fopen(name_one, "r"); |
| 674 | if (f_one == NULL) moan(1, name_one); |
| 675 | f_two = fopen(name_two, "r"); |
| 676 | if (f_two == NULL) moan(1, name_two); |
| 677 | |
| 678 | bufbase_one = (char *)malloc(storesize); |
| 679 | buftop_one = bufbase_one + storesize; |
| 680 | bufbase_two = (char *)malloc(storesize); |
| 681 | buftop_two = bufbase_two + storesize; |
| 682 | |
| 683 | /* Do the job */ |
| 684 | |
| 685 | compare(); |
| 686 | |
| 687 | /* Final messages */ |
| 688 | |
| 689 | if (return_code == 0) |
| 690 | fprintf(f_out, "\"%s\" and \"%s\" are identical.\n", name_one, name_two); |
| 691 | else |
| 692 | { |
| 693 | if (echo) rule('=', 15); |
| 694 | fprintf(f_out, "%d difference", return_code); |
| 695 | if (return_code != 1) fprintf(f_out, "s"); |
| 696 | fprintf(f_out, " found.\n"); |
| 697 | |
| 698 | lines_one -= 1; |
| 699 | fprintf(f_out, "\"%s\" contains %d line", name_one, lines_one); |
| 700 | if (lines_one != 1) fprintf(f_out, "s"); |
| 701 | |
| 702 | lines_two -= 1; |
| 703 | fprintf(f_out, "; \"%s\" contains %d line", name_two, lines_two); |
| 704 | if (lines_two != 1) fprintf(f_out, "s"); |
| 705 | fprintf(f_out, ".\n"); |
| 706 | } |
| 707 | |
| 708 | free(bufbase_one); |
| 709 | free(bufbase_two); |
| 710 | |
| 711 | fclose(f_one); |
| 712 | fclose(f_two); |
| 713 | if (f_out != stdout) fclose(f_out); |
| 714 | |
| 715 | return return_code; |
| 716 | } |
| 717 | |
| 718 | /* End of PH-Compare. */ |