| 1 | #include "tweak.h" |
| 2 | |
| 3 | #include <stdio.h> |
| 4 | #include <stdlib.h> |
| 5 | #include <string.h> |
| 6 | #include <ctype.h> |
| 7 | |
| 8 | static void act_exit (void); |
| 9 | static void act_save (void); |
| 10 | static void act_exitsave (void); |
| 11 | static void act_top (void); |
| 12 | static void act_pgup (void); |
| 13 | static void act_up (void); |
| 14 | static void act_home (void); |
| 15 | static void act_left (void); |
| 16 | static void act_right (void); |
| 17 | static void act_end (void); |
| 18 | static void act_down (void); |
| 19 | static void act_pgdn (void); |
| 20 | static void act_bottom (void); |
| 21 | static void act_togins (void); |
| 22 | static void act_chmode (void); |
| 23 | extern void act_self_ins (void); /* this one must be external */ |
| 24 | static void act_delete (void); |
| 25 | static void act_delch (void); |
| 26 | static void act_mark (void); |
| 27 | static void act_cut (void); |
| 28 | static void act_copy (void); |
| 29 | static void act_paste (void); |
| 30 | static void act_susp (void); |
| 31 | static void act_goto (void); |
| 32 | static void act_togstat (void); |
| 33 | static void act_search (void); |
| 34 | static void act_search_backwards (void); |
| 35 | static void act_recentre (void); |
| 36 | static void act_width (void); |
| 37 | static void act_offset (void); |
| 38 | #ifdef TEST_BUFFER |
| 39 | static void act_diagnostics (void); |
| 40 | #endif |
| 41 | |
| 42 | static Search *last_search = NULL; |
| 43 | |
| 44 | keyact parse_action (char *name) { |
| 45 | char *names[] = { |
| 46 | "exit", "top-of-file", "page-up", "move-up", |
| 47 | "begin-line", "move-left", "move-right", "end-line", |
| 48 | "move-down", "page-down", "bottom-of-file", "toggle-insert", |
| 49 | "change-mode", "delete-left", "delete-right", "mark-place", |
| 50 | "cut", "copy", "paste", "suspend", "goto-position", |
| 51 | "toggle-status", "search", "search-back", "save-file", |
| 52 | "exit-and-save", "screen-recentre", "new-width", "new-offset" |
| 53 | #ifdef TEST_BUFFER |
| 54 | , "diagnostics" |
| 55 | #endif |
| 56 | }; |
| 57 | keyact actions[] = { |
| 58 | act_exit, act_top, act_pgup, act_up, act_home, act_left, |
| 59 | act_right, act_end, act_down, act_pgdn, act_bottom, |
| 60 | act_togins, act_chmode, act_delete, act_delch, act_mark, |
| 61 | act_cut, act_copy, act_paste, act_susp, act_goto, |
| 62 | act_togstat, act_search, act_search_backwards, act_save, |
| 63 | act_exitsave, act_recentre, act_width, act_offset |
| 64 | #ifdef TEST_BUFFER |
| 65 | , act_diagnostics |
| 66 | #endif |
| 67 | }; |
| 68 | int i; |
| 69 | |
| 70 | for (i=0; i<sizeof(names)/sizeof(*names); i++) |
| 71 | if (!strcmp(name, names[i])) |
| 72 | return actions[i]; |
| 73 | return NULL; |
| 74 | } |
| 75 | |
| 76 | static fileoffset_t begline(fileoffset_t x) { |
| 77 | fileoffset_t y = x + width-offset; |
| 78 | y -= (y % width); |
| 79 | y -= width-offset; |
| 80 | if (y < 0) |
| 81 | y = 0; |
| 82 | return y; |
| 83 | } |
| 84 | |
| 85 | static fileoffset_t endline(fileoffset_t x) { |
| 86 | fileoffset_t y = x + width-offset; |
| 87 | y -= (y % width); |
| 88 | y += width-1; |
| 89 | y -= width-offset; |
| 90 | if (y < 0) |
| 91 | y = 0; |
| 92 | return y; |
| 93 | } |
| 94 | |
| 95 | static void act_exit(void) { |
| 96 | static char question[] = "File is modified. Save before quitting? [yn] "; |
| 97 | if (modified) { |
| 98 | int c; |
| 99 | |
| 100 | display_moveto (display_rows-1, 0); |
| 101 | display_clear_to_eol (); |
| 102 | display_set_colour (COL_MINIBUF); |
| 103 | display_write_str (question); |
| 104 | display_refresh(); |
| 105 | do { |
| 106 | #if defined(unix) && !defined(GO32) |
| 107 | if (update_required) { |
| 108 | update(); |
| 109 | display_moveto (display_rows-1, 0); |
| 110 | display_clear_to_eol (); |
| 111 | display_set_colour (COL_MINIBUF); |
| 112 | display_write_str (question); |
| 113 | display_refresh(); |
| 114 | } |
| 115 | safe_update = TRUE; |
| 116 | #endif |
| 117 | c = display_getkey(); |
| 118 | #if defined(unix) && !defined(GO32) |
| 119 | safe_update = FALSE; |
| 120 | #endif |
| 121 | if (c >= 'a' && c <= 'z') |
| 122 | c += 'A'-'a'; |
| 123 | } while (c != 'Y' && c != 'N' && c != '\007'); |
| 124 | if (c == 'Y') { |
| 125 | act_save(); |
| 126 | if (modified) |
| 127 | return; /* couldn't save, so don't quit */ |
| 128 | draw_scr(); /* update the ** on status line! */ |
| 129 | } else if (c == '\007') { |
| 130 | return; /* don't even quit */ |
| 131 | } |
| 132 | } |
| 133 | finished = TRUE; |
| 134 | } |
| 135 | |
| 136 | static void act_save(void) { |
| 137 | static int backed_up = FALSE; |
| 138 | |
| 139 | if (!backed_up) { |
| 140 | if (!backup_file()) { |
| 141 | display_beep(); |
| 142 | strcpy (message, "Unable to back up file!"); |
| 143 | return; |
| 144 | } |
| 145 | backed_up = TRUE; |
| 146 | } |
| 147 | if (!save_file()) { |
| 148 | display_beep(); |
| 149 | strcpy (message, "Unable to save file!"); |
| 150 | return; |
| 151 | } |
| 152 | modified = FALSE; |
| 153 | } |
| 154 | |
| 155 | static void act_exitsave(void) { |
| 156 | act_save(); |
| 157 | draw_scr(); /* update ** on status line */ |
| 158 | act_exit(); |
| 159 | } |
| 160 | |
| 161 | static void act_top (void) { |
| 162 | cur_pos = top_pos = 0; |
| 163 | edit_type = !!edit_type; |
| 164 | } |
| 165 | |
| 166 | static void act_pgup(void) { |
| 167 | cur_pos -= (scrlines-1)*width; |
| 168 | if (cur_pos < 0) { |
| 169 | cur_pos = 0; |
| 170 | edit_type = !!edit_type; |
| 171 | } |
| 172 | if (top_pos > cur_pos) |
| 173 | top_pos = begline(cur_pos); |
| 174 | } |
| 175 | |
| 176 | static void act_up(void) { |
| 177 | cur_pos -= width; |
| 178 | if (cur_pos < 0) { |
| 179 | cur_pos = 0; |
| 180 | edit_type = !!edit_type; |
| 181 | } |
| 182 | if (top_pos > cur_pos) |
| 183 | top_pos = begline(cur_pos); |
| 184 | } |
| 185 | |
| 186 | static void act_home(void) { |
| 187 | cur_pos = begline(cur_pos); |
| 188 | if (cur_pos < 0) |
| 189 | cur_pos = 0; |
| 190 | if (top_pos > cur_pos) |
| 191 | top_pos = begline(cur_pos); |
| 192 | edit_type = !!edit_type; |
| 193 | } |
| 194 | |
| 195 | static void act_left(void) { |
| 196 | if (edit_type == 2) { |
| 197 | edit_type = 1; |
| 198 | return; |
| 199 | } else { |
| 200 | cur_pos--; |
| 201 | edit_type = 2*!!edit_type; |
| 202 | if (cur_pos < 0) { |
| 203 | cur_pos = 0; |
| 204 | edit_type = !!edit_type; |
| 205 | } |
| 206 | if (top_pos > cur_pos) |
| 207 | top_pos = begline(cur_pos); |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | static void act_right(void) { |
| 212 | fileoffset_t new_top; |
| 213 | |
| 214 | if (edit_type == 1) { |
| 215 | if (cur_pos < file_size) |
| 216 | edit_type = 2; |
| 217 | return; |
| 218 | } else { |
| 219 | cur_pos++; |
| 220 | if (cur_pos > file_size) |
| 221 | cur_pos = file_size; |
| 222 | new_top = cur_pos - (scrlines-1) * width; |
| 223 | if (new_top < 0) |
| 224 | new_top = 0; |
| 225 | new_top = begline(new_top); |
| 226 | if (top_pos < new_top) |
| 227 | top_pos = new_top; |
| 228 | edit_type = !!edit_type; |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | static void act_end(void) { |
| 233 | fileoffset_t new_top; |
| 234 | |
| 235 | cur_pos = endline(cur_pos); |
| 236 | edit_type = !!edit_type; |
| 237 | if (cur_pos >= file_size) |
| 238 | cur_pos = file_size; |
| 239 | new_top = cur_pos - (scrlines-1) * width; |
| 240 | if (new_top < 0) |
| 241 | new_top = 0; |
| 242 | new_top = begline(new_top); |
| 243 | if (top_pos < new_top) |
| 244 | top_pos = new_top; |
| 245 | } |
| 246 | |
| 247 | static void act_down(void) { |
| 248 | fileoffset_t new_top; |
| 249 | |
| 250 | cur_pos += width; |
| 251 | if (cur_pos >= file_size) { |
| 252 | cur_pos = file_size; |
| 253 | edit_type = !!edit_type; |
| 254 | } |
| 255 | new_top = cur_pos - (scrlines-1) * width; |
| 256 | if (new_top < 0) |
| 257 | new_top = 0; |
| 258 | new_top = begline(new_top); |
| 259 | if (top_pos < new_top) |
| 260 | top_pos = new_top; |
| 261 | } |
| 262 | |
| 263 | static void act_pgdn(void) { |
| 264 | fileoffset_t new_top; |
| 265 | |
| 266 | cur_pos += (scrlines-1) * width; |
| 267 | if (cur_pos >= file_size) { |
| 268 | cur_pos = file_size; |
| 269 | edit_type = !!edit_type; |
| 270 | } |
| 271 | new_top = cur_pos - (scrlines-1) * width; |
| 272 | if (new_top < 0) |
| 273 | new_top = 0; |
| 274 | new_top = begline(new_top); |
| 275 | if (top_pos < new_top) |
| 276 | top_pos = new_top; |
| 277 | } |
| 278 | |
| 279 | static void act_bottom (void) { |
| 280 | fileoffset_t new_top; |
| 281 | |
| 282 | cur_pos = file_size; |
| 283 | edit_type = !!edit_type; |
| 284 | new_top = cur_pos - (scrlines-1) * width; |
| 285 | if (new_top < 0) |
| 286 | new_top = 0; |
| 287 | new_top = begline(new_top); |
| 288 | if (top_pos < new_top) |
| 289 | top_pos = new_top; |
| 290 | } |
| 291 | |
| 292 | static void act_togins(void) { |
| 293 | if (look_mode || fix_mode) { |
| 294 | display_beep(); |
| 295 | sprintf(message, "Can't engage Insert mode when in %s mode", |
| 296 | (look_mode ? "LOOK" : "FIX")); |
| 297 | insert_mode = FALSE; /* safety! */ |
| 298 | } else |
| 299 | insert_mode = !insert_mode; |
| 300 | } |
| 301 | |
| 302 | static void act_chmode(void) { |
| 303 | if (ascii_enabled) |
| 304 | edit_type = !edit_type; /* 0 -> 1, [12] -> 0 */ |
| 305 | else if (edit_type == 0) /* just in case */ |
| 306 | edit_type = 1; |
| 307 | } |
| 308 | |
| 309 | void act_self_ins(void) { |
| 310 | int insert = insert_mode; |
| 311 | unsigned char c; |
| 312 | |
| 313 | if (look_mode) { |
| 314 | display_beep(); |
| 315 | strcpy (message, "Can't modify file in LOOK mode"); |
| 316 | return; |
| 317 | } |
| 318 | |
| 319 | if (edit_type) { |
| 320 | if (last_char >= '0' && last_char <= '9') |
| 321 | last_char -= '0'; |
| 322 | else if (last_char >= 'A' && last_char <= 'F') |
| 323 | last_char -= 'A'-10; |
| 324 | else if (last_char >= 'a' && last_char <= 'f') |
| 325 | last_char -= 'a'-10; |
| 326 | else { |
| 327 | display_beep(); |
| 328 | strcpy(message, "Not a valid character when in hex editing mode"); |
| 329 | return; |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | if ( (!insert || edit_type == 2) && cur_pos == file_size) { |
| 334 | display_beep(); |
| 335 | strcpy(message, "End of file reached"); |
| 336 | return; |
| 337 | } |
| 338 | |
| 339 | switch (edit_type) { |
| 340 | case 0: /* ascii mode */ |
| 341 | c = last_char; |
| 342 | break; |
| 343 | case 1: /* hex, first digit */ |
| 344 | if (insert) |
| 345 | c = 0; |
| 346 | else |
| 347 | buf_fetch_data(filedata, &c, 1, cur_pos); |
| 348 | c &= 0xF; |
| 349 | c |= 16 * last_char; |
| 350 | break; |
| 351 | case 2: /* hex, second digit */ |
| 352 | buf_fetch_data(filedata, &c, 1, cur_pos); |
| 353 | c &= 0xF0; |
| 354 | c |= last_char; |
| 355 | insert = FALSE; |
| 356 | break; |
| 357 | } |
| 358 | |
| 359 | if (insert) { |
| 360 | buf_insert_data(filedata, &c, 1, cur_pos); |
| 361 | file_size++; |
| 362 | modified = TRUE; |
| 363 | } else if (cur_pos < file_size) { |
| 364 | buf_overwrite_data(filedata, &c, 1, cur_pos); |
| 365 | modified = TRUE; |
| 366 | } else { |
| 367 | display_beep(); |
| 368 | strcpy(message, "End of file reached"); |
| 369 | } |
| 370 | act_right(); |
| 371 | } |
| 372 | |
| 373 | static void act_delete(void) { |
| 374 | if (!insert_mode || (edit_type!=2 && cur_pos==0)) { |
| 375 | display_beep(); |
| 376 | strcpy (message, "Can't delete while not in Insert mode"); |
| 377 | } else if (cur_pos > 0 || edit_type == 2) { |
| 378 | act_left(); |
| 379 | buf_delete (filedata, 1, cur_pos); |
| 380 | file_size--; |
| 381 | edit_type = !!edit_type; |
| 382 | modified = TRUE; |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | static void act_delch(void) { |
| 387 | if (!insert_mode) { |
| 388 | display_beep(); |
| 389 | strcpy (message, "Can't delete while not in Insert mode"); |
| 390 | } else if (cur_pos < file_size) { |
| 391 | buf_delete (filedata, 1, cur_pos); |
| 392 | file_size--; |
| 393 | edit_type = !!edit_type; |
| 394 | modified = TRUE; |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | static void act_mark (void) { |
| 399 | if (look_mode) { |
| 400 | display_beep(); |
| 401 | strcpy (message, "Can't cut or paste in LOOK mode"); |
| 402 | marking = FALSE; /* safety */ |
| 403 | return; |
| 404 | } |
| 405 | marking = !marking; |
| 406 | mark_point = cur_pos; |
| 407 | } |
| 408 | |
| 409 | static void act_cut (void) { |
| 410 | fileoffset_t marktop, marksize; |
| 411 | |
| 412 | if (!marking || mark_point==cur_pos) { |
| 413 | display_beep(); |
| 414 | strcpy (message, "Set mark first"); |
| 415 | return; |
| 416 | } |
| 417 | if (!insert_mode) { |
| 418 | display_beep(); |
| 419 | strcpy (message, "Can't cut while not in Insert mode"); |
| 420 | return; |
| 421 | } |
| 422 | marktop = cur_pos; |
| 423 | marksize = mark_point - cur_pos; |
| 424 | if (marksize < 0) { |
| 425 | marktop += marksize; |
| 426 | marksize = -marksize; |
| 427 | } |
| 428 | if (cutbuffer) |
| 429 | buf_free (cutbuffer); |
| 430 | cutbuffer = buf_cut (filedata, marksize, marktop); |
| 431 | file_size -= marksize; |
| 432 | cur_pos = marktop; |
| 433 | if (cur_pos < 0) |
| 434 | cur_pos = 0; |
| 435 | if (top_pos > cur_pos) |
| 436 | top_pos = begline(cur_pos); |
| 437 | edit_type = !!edit_type; |
| 438 | modified = TRUE; |
| 439 | marking = FALSE; |
| 440 | } |
| 441 | |
| 442 | static void act_copy (void) { |
| 443 | fileoffset_t marktop, marksize; |
| 444 | |
| 445 | if (!marking) { |
| 446 | display_beep(); |
| 447 | strcpy (message, "Set mark first"); |
| 448 | return; |
| 449 | } |
| 450 | marktop = cur_pos; |
| 451 | marksize = mark_point - cur_pos; |
| 452 | if (marksize < 0) { |
| 453 | marktop += marksize; |
| 454 | marksize = -marksize; |
| 455 | } |
| 456 | if (cutbuffer) |
| 457 | buf_free (cutbuffer); |
| 458 | cutbuffer = buf_copy (filedata, marksize, marktop); |
| 459 | marking = FALSE; |
| 460 | } |
| 461 | |
| 462 | static void act_paste (void) { |
| 463 | fileoffset_t cutsize, new_top; |
| 464 | |
| 465 | if (!cutbuffer) |
| 466 | return; |
| 467 | cutsize = buf_length (cutbuffer); |
| 468 | if (!insert_mode) { |
| 469 | if (cur_pos + cutsize > file_size) { |
| 470 | display_beep(); |
| 471 | strcpy (message, "Too close to end of file to paste"); |
| 472 | return; |
| 473 | } |
| 474 | buf_delete (filedata, cutsize, cur_pos); |
| 475 | file_size -= cutsize; |
| 476 | } |
| 477 | buf_paste (filedata, cutbuffer, cur_pos); |
| 478 | modified = TRUE; |
| 479 | cur_pos += cutsize; |
| 480 | file_size += cutsize; |
| 481 | edit_type = !!edit_type; |
| 482 | new_top = cur_pos - (scrlines-1) * width; |
| 483 | if (new_top < 0) |
| 484 | new_top = 0; |
| 485 | new_top = begline(new_top); |
| 486 | if (top_pos < new_top) |
| 487 | top_pos = new_top; |
| 488 | } |
| 489 | |
| 490 | static void act_susp (void) { |
| 491 | suspend(); |
| 492 | } |
| 493 | |
| 494 | static void act_goto (void) { |
| 495 | char buffer[80]; |
| 496 | fileoffset_t position, new_top; |
| 497 | int error; |
| 498 | |
| 499 | if (!get_str("Enter position to go to: ", buffer, FALSE)) |
| 500 | return; /* user break */ |
| 501 | |
| 502 | position = parse_num (buffer, &error); |
| 503 | if (error) { |
| 504 | display_beep(); |
| 505 | strcpy (message, "Unable to parse position value"); |
| 506 | return; |
| 507 | } |
| 508 | |
| 509 | if (position < 0 || position > file_size) { |
| 510 | display_beep(); |
| 511 | strcpy (message, "Position is outside bounds of file"); |
| 512 | return; |
| 513 | } |
| 514 | |
| 515 | cur_pos = position; |
| 516 | edit_type = !!edit_type; |
| 517 | new_top = cur_pos - (scrlines-1) * width; |
| 518 | if (new_top < 0) |
| 519 | new_top = 0; |
| 520 | new_top = begline(new_top); |
| 521 | if (top_pos > cur_pos) |
| 522 | top_pos = begline(cur_pos); |
| 523 | if (top_pos < new_top) |
| 524 | top_pos = new_top; |
| 525 | } |
| 526 | |
| 527 | static void act_togstat (void) { |
| 528 | if (statfmt == decstatus) |
| 529 | statfmt = hexstatus; |
| 530 | else |
| 531 | statfmt = decstatus; |
| 532 | } |
| 533 | |
| 534 | static int search_prompt(char *withdef, char *withoutdef) |
| 535 | { |
| 536 | char buffer[80]; |
| 537 | int len; |
| 538 | |
| 539 | if (!get_str(last_search ? withdef : withoutdef, buffer, TRUE)) |
| 540 | return 0; /* user break */ |
| 541 | if (!last_search && !*buffer) { |
| 542 | strcpy (message, "Search aborted."); |
| 543 | return 0; |
| 544 | } |
| 545 | |
| 546 | if (!*buffer) { |
| 547 | len = last_search->len; |
| 548 | } else { |
| 549 | len = parse_quoted (buffer); |
| 550 | if (len == -1) { |
| 551 | display_beep(); |
| 552 | strcpy (message, "Invalid escape sequence in search string"); |
| 553 | return 0; |
| 554 | } |
| 555 | if (last_search) |
| 556 | free_search(last_search); |
| 557 | last_search = build_search (buffer, len); |
| 558 | } |
| 559 | |
| 560 | return 1; |
| 561 | } |
| 562 | |
| 563 | static void act_search (void) { |
| 564 | int len; |
| 565 | fileoffset_t posn, dfapos; |
| 566 | DFA dfa; |
| 567 | static unsigned char sblk[SEARCH_BLK]; |
| 568 | static char withdef[] = "Search forward (default=last): "; |
| 569 | static char withoutdef[] = "Search forward: "; |
| 570 | |
| 571 | if (!search_prompt(withdef, withoutdef)) |
| 572 | return; |
| 573 | |
| 574 | dfa = last_search->forward; |
| 575 | len = last_search->len; |
| 576 | dfapos = 0; |
| 577 | |
| 578 | for (posn = cur_pos+1; posn < file_size; posn++) { |
| 579 | unsigned char *q; |
| 580 | int size = SEARCH_BLK; |
| 581 | |
| 582 | if (size > file_size-posn) |
| 583 | size = file_size-posn; |
| 584 | buf_fetch_data (filedata, sblk, size, posn); |
| 585 | q = sblk; |
| 586 | while (size--) { |
| 587 | posn++; |
| 588 | dfapos = dfa[dfapos][*q++]; |
| 589 | if (dfapos == len) { |
| 590 | fileoffset_t new_top; |
| 591 | |
| 592 | cur_pos = posn - len; |
| 593 | edit_type = !!edit_type; |
| 594 | new_top = cur_pos - (scrlines-1) * width; |
| 595 | new_top = begline(new_top); |
| 596 | if (top_pos < new_top) |
| 597 | top_pos = new_top; |
| 598 | return; |
| 599 | } |
| 600 | } |
| 601 | } |
| 602 | strcpy (message, "Not found."); |
| 603 | } |
| 604 | |
| 605 | static void act_search_backwards (void) { |
| 606 | int len; |
| 607 | fileoffset_t posn, dfapos; |
| 608 | DFA dfa; |
| 609 | static unsigned char sblk[SEARCH_BLK]; |
| 610 | static char withdef[] = "Search backward (default=last): "; |
| 611 | static char withoutdef[] = "Search backward: "; |
| 612 | |
| 613 | if (!search_prompt(withdef, withoutdef)) |
| 614 | return; |
| 615 | |
| 616 | dfa = last_search->reverse; |
| 617 | len = last_search->len; |
| 618 | dfapos = 0; |
| 619 | |
| 620 | posn = cur_pos + len - 1; |
| 621 | if (posn >= file_size) |
| 622 | posn = file_size; |
| 623 | |
| 624 | for (; posn >= 0; posn--) { |
| 625 | unsigned char *q; |
| 626 | int size = SEARCH_BLK; |
| 627 | |
| 628 | if (size > posn) |
| 629 | size = posn; |
| 630 | buf_fetch_data (filedata, sblk, size, posn-size); |
| 631 | q = sblk + size; |
| 632 | while (size--) { |
| 633 | posn--; |
| 634 | dfapos = dfa[dfapos][*--q]; |
| 635 | if (dfapos == len) { |
| 636 | fileoffset_t new_top; |
| 637 | |
| 638 | cur_pos = posn; |
| 639 | edit_type = !!edit_type; |
| 640 | new_top = cur_pos - (scrlines-1) * width; |
| 641 | new_top = begline(new_top); |
| 642 | if (top_pos > new_top) |
| 643 | top_pos = new_top; |
| 644 | return; |
| 645 | } |
| 646 | } |
| 647 | } |
| 648 | strcpy (message, "Not found."); |
| 649 | } |
| 650 | |
| 651 | static void act_recentre (void) { |
| 652 | top_pos = cur_pos - (display_rows-2)/2 * width; |
| 653 | if (top_pos < 0) |
| 654 | top_pos = 0; |
| 655 | top_pos = begline(top_pos); |
| 656 | } |
| 657 | |
| 658 | static void act_width (void) { |
| 659 | char buffer[80]; |
| 660 | char prompt[80]; |
| 661 | fileoffset_t w; |
| 662 | fileoffset_t new_top; |
| 663 | int error; |
| 664 | |
| 665 | sprintf (prompt, "Enter screen width in bytes (now %"OFF"d): ", width); |
| 666 | if (!get_str (prompt, buffer, FALSE)) |
| 667 | return; |
| 668 | w = parse_num (buffer, &error); |
| 669 | if (error) { |
| 670 | display_beep(); |
| 671 | strcpy (message, "Unable to parse width value"); |
| 672 | return; |
| 673 | } |
| 674 | if (w > 0) { |
| 675 | width = w; |
| 676 | fix_offset(); |
| 677 | new_top = cur_pos - (scrlines-1) * width; |
| 678 | new_top = begline(new_top); |
| 679 | if (top_pos < new_top) |
| 680 | top_pos = new_top; |
| 681 | } |
| 682 | } |
| 683 | |
| 684 | static void act_offset (void) { |
| 685 | char buffer[80]; |
| 686 | char prompt[80]; |
| 687 | fileoffset_t o; |
| 688 | fileoffset_t new_top; |
| 689 | int error; |
| 690 | |
| 691 | sprintf (prompt, "Enter start-of-file offset in bytes (now %"OFF"d): ", |
| 692 | realoffset); |
| 693 | if (!get_str (prompt, buffer, FALSE)) |
| 694 | return; |
| 695 | o = parse_num (buffer, &error); |
| 696 | if (error) { |
| 697 | display_beep(); |
| 698 | strcpy (message, "Unable to parse offset value"); |
| 699 | return; |
| 700 | } |
| 701 | if (o >= 0) { |
| 702 | realoffset = o; |
| 703 | fix_offset(); |
| 704 | new_top = cur_pos - (scrlines-1) * width; |
| 705 | new_top = begline(new_top); |
| 706 | if (top_pos < new_top) |
| 707 | top_pos = new_top; |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | #ifdef TEST_BUFFER |
| 712 | static void act_diagnostics(void) |
| 713 | { |
| 714 | extern void buffer_diagnostic(buffer *buf, char *title); |
| 715 | |
| 716 | buffer_diagnostic(filedata, "filedata"); |
| 717 | buffer_diagnostic(cutbuffer, "cutbuffer"); |
| 718 | } |
| 719 | #endif |