| 1 | /* Copyright (c) 1979 Regents of the University of California */ |
| 2 | #include "ex.h" |
| 3 | #include "ex_tty.h" |
| 4 | #include "ex_vis.h" |
| 5 | |
| 6 | /* |
| 7 | * Low level routines for operations sequences, |
| 8 | * and mostly, insert mode (and a subroutine |
| 9 | * to read an input line, including in the echo area.) |
| 10 | */ |
| 11 | char *vUA1, *vUA2; |
| 12 | char *vUD1, *vUD2; |
| 13 | |
| 14 | /* |
| 15 | * Obleeperate characters in hardcopy |
| 16 | * open with \'s. |
| 17 | */ |
| 18 | bleep(i, cp) |
| 19 | register int i; |
| 20 | char *cp; |
| 21 | { |
| 22 | |
| 23 | i -= column(cp); |
| 24 | do |
| 25 | putchar('\\' | QUOTE); |
| 26 | while (--i >= 0); |
| 27 | rubble = 1; |
| 28 | } |
| 29 | |
| 30 | /* |
| 31 | * Common code for middle part of delete |
| 32 | * and change operating on parts of lines. |
| 33 | */ |
| 34 | vdcMID() |
| 35 | { |
| 36 | register char *cp; |
| 37 | |
| 38 | squish(); |
| 39 | setLAST(); |
| 40 | vundkind = VCHNG, CP(vutmp, linebuf); |
| 41 | if (wcursor < cursor) |
| 42 | cp = wcursor, wcursor = cursor, cursor = cp; |
| 43 | vUD1 = vUA1 = vUA2 = cursor; vUD2 = wcursor; |
| 44 | return (column(wcursor - 1)); |
| 45 | } |
| 46 | |
| 47 | /* |
| 48 | * Take text from linebuf and stick it |
| 49 | * in the VBSIZE buffer BUF. Used to save |
| 50 | * deleted text of part of line. |
| 51 | */ |
| 52 | takeout(BUF) |
| 53 | char *BUF; |
| 54 | { |
| 55 | register char *cp; |
| 56 | |
| 57 | if (wcursor < linebuf) |
| 58 | wcursor = linebuf; |
| 59 | if (cursor == wcursor) { |
| 60 | beep(); |
| 61 | return; |
| 62 | } |
| 63 | if (wcursor < cursor) { |
| 64 | cp = wcursor; |
| 65 | wcursor = cursor; |
| 66 | cursor = cp; |
| 67 | } |
| 68 | setBUF(BUF); |
| 69 | if ((BUF[0] & (QUOTE|TRIM)) == OVERBUF) |
| 70 | beep(); |
| 71 | } |
| 72 | |
| 73 | /* |
| 74 | * Are we at the end of the printed representation of the |
| 75 | * line? Used internally in hardcopy open. |
| 76 | */ |
| 77 | ateopr() |
| 78 | { |
| 79 | register int i, c; |
| 80 | register char *cp = vtube[destline] + destcol; |
| 81 | |
| 82 | for (i = WCOLS - destcol; i > 0; i--) { |
| 83 | c = *cp++; |
| 84 | if (c == 0) |
| 85 | return (1); |
| 86 | if (c != ' ' && (c & QUOTE) == 0) |
| 87 | return (0); |
| 88 | } |
| 89 | return (1); |
| 90 | } |
| 91 | |
| 92 | /* |
| 93 | * Append. |
| 94 | * |
| 95 | * This routine handles the top level append, doing work |
| 96 | * as each new line comes in, and arranging repeatability. |
| 97 | * It also handles append with repeat counts, and calculation |
| 98 | * of autoindents for new lines. |
| 99 | */ |
| 100 | bool vaifirst; |
| 101 | bool gobbled; |
| 102 | char *ogcursor; |
| 103 | |
| 104 | vappend(ch, cnt, indent) |
| 105 | char ch; |
| 106 | int cnt, indent; |
| 107 | { |
| 108 | register int i; |
| 109 | register char *gcursor; |
| 110 | bool escape; |
| 111 | int repcnt; |
| 112 | short oldhold = hold; |
| 113 | |
| 114 | /* |
| 115 | * Before a move in hardopen when the line is dirty |
| 116 | * or we are in the middle of the printed representation, |
| 117 | * we retype the line to the left of the cursor so the |
| 118 | * insert looks clean. |
| 119 | */ |
| 120 | if (ch != 'o' && state == HARDOPEN && (rubble || !ateopr())) { |
| 121 | rubble = 1; |
| 122 | gcursor = cursor; |
| 123 | i = *gcursor; |
| 124 | *gcursor = ' '; |
| 125 | wcursor = gcursor; |
| 126 | vmove(); |
| 127 | *gcursor = i; |
| 128 | } |
| 129 | vaifirst = indent == 0; |
| 130 | |
| 131 | /* |
| 132 | * Handle replace character by (eventually) |
| 133 | * limiting the number of input characters allowed |
| 134 | * in the vgetline routine. |
| 135 | */ |
| 136 | if (ch == 'r') |
| 137 | repcnt = 2; |
| 138 | else |
| 139 | repcnt = 0; |
| 140 | |
| 141 | /* |
| 142 | * If an autoindent is specified, then |
| 143 | * generate a mixture of blanks to tabs to implement |
| 144 | * it and place the cursor after the indent. |
| 145 | * Text read by the vgetline routine will be placed in genbuf, |
| 146 | * so the indent is generated there. |
| 147 | */ |
| 148 | if (value(AUTOINDENT) && indent != 0) { |
| 149 | gcursor = genindent(indent); |
| 150 | *gcursor = 0; |
| 151 | vgotoCL(qcolumn(cursor - 1, genbuf)); |
| 152 | } else { |
| 153 | gcursor = genbuf; |
| 154 | *gcursor = 0; |
| 155 | if (ch == 'o') |
| 156 | vfixcurs(); |
| 157 | } |
| 158 | |
| 159 | /* |
| 160 | * Prepare for undo. Pointers delimit inserted portion of line. |
| 161 | */ |
| 162 | vUA1 = vUA2 = cursor; |
| 163 | |
| 164 | /* |
| 165 | * If we are not in a repeated command and a ^@ comes in |
| 166 | * then this means the previous inserted text. |
| 167 | * If there is none or it was too long to be saved, |
| 168 | * then beep() and also arrange to undo any damage done |
| 169 | * so far (e.g. if we are a change.) |
| 170 | */ |
| 171 | if ((vglobp && *vglobp == 0) || peekbr()) { |
| 172 | if ((INS[0] & (QUOTE|TRIM)) == OVERBUF) { |
| 173 | beep(); |
| 174 | if (!splitw) |
| 175 | ungetkey('u'); |
| 176 | doomed = 0; |
| 177 | hold = oldhold; |
| 178 | return; |
| 179 | } |
| 180 | /* |
| 181 | * Unread input from INS. |
| 182 | * An escape will be generated at end of string. |
| 183 | * Hold off n^^2 type update on dumb terminals. |
| 184 | */ |
| 185 | vglobp = INS; |
| 186 | hold |= HOLDQIK; |
| 187 | } else if (vglobp == 0) |
| 188 | /* |
| 189 | * Not a repeated command, get |
| 190 | * a new inserted text for repeat. |
| 191 | */ |
| 192 | INS[0] = 0; |
| 193 | |
| 194 | /* |
| 195 | * For wrapmargin to hack away second space after a '.' |
| 196 | * when the first space caused a line break we keep |
| 197 | * track that this happened in gobblebl, which says |
| 198 | * to gobble up a blank silently. |
| 199 | */ |
| 200 | gobblebl = 0; |
| 201 | |
| 202 | /* |
| 203 | * Text gathering loop. |
| 204 | * New text goes into genbuf starting at gcursor. |
| 205 | * cursor preserves place in linebuf where text will eventually go. |
| 206 | */ |
| 207 | if (*cursor == 0 || state == CRTOPEN) |
| 208 | hold |= HOLDROL; |
| 209 | for (;;) { |
| 210 | if (ch == 'r' && repcnt == 0) |
| 211 | escape = 0; |
| 212 | else { |
| 213 | gcursor = vgetline(repcnt, gcursor, &escape); |
| 214 | |
| 215 | /* |
| 216 | * After an append, stick information |
| 217 | * about the ^D's and ^^D's and 0^D's in |
| 218 | * the repeated text buffer so repeated |
| 219 | * inserts of stuff indented with ^D as backtab's |
| 220 | * can work. |
| 221 | */ |
| 222 | if (HADUP) |
| 223 | addtext("^"); |
| 224 | else if (HADZERO) |
| 225 | addtext("0"); |
| 226 | while (CDCNT > 0) |
| 227 | addtext("\204"), CDCNT--; |
| 228 | if (gobbled) |
| 229 | addtext(" "); |
| 230 | addtext(ogcursor); |
| 231 | } |
| 232 | repcnt = 0; |
| 233 | |
| 234 | /* |
| 235 | * Smash the generated and preexisting indents together |
| 236 | * and generate one cleanly made out of tabs and spaces |
| 237 | * if we are using autoindent. |
| 238 | */ |
| 239 | if (!vaifirst && value(AUTOINDENT)) { |
| 240 | i = fixindent(indent); |
| 241 | if (!HADUP) |
| 242 | indent = i; |
| 243 | gcursor = strend(genbuf); |
| 244 | } |
| 245 | |
| 246 | /* |
| 247 | * Limit the repetition count based on maximum |
| 248 | * possible line length; do output implied |
| 249 | * by further count (> 1) and cons up the new line |
| 250 | * in linebuf. |
| 251 | */ |
| 252 | cnt = vmaxrep(ch, cnt); |
| 253 | CP(gcursor + 1, cursor); |
| 254 | do { |
| 255 | CP(cursor, genbuf); |
| 256 | if (cnt > 1) { |
| 257 | int oldhold = hold; |
| 258 | |
| 259 | Outchar = vinschar; |
| 260 | hold |= HOLDQIK; |
| 261 | printf("%s", genbuf); |
| 262 | hold = oldhold; |
| 263 | Outchar = vputchar; |
| 264 | } |
| 265 | cursor += gcursor - genbuf; |
| 266 | } while (--cnt > 0); |
| 267 | endim(); |
| 268 | vUA2 = cursor; |
| 269 | if (escape != '\n') |
| 270 | CP(cursor, gcursor + 1); |
| 271 | |
| 272 | /* |
| 273 | * If doomed characters remain, clobber them, |
| 274 | * and reopen the line to get the display exact. |
| 275 | */ |
| 276 | if (state != HARDOPEN) { |
| 277 | DEPTH(vcline) = 0; |
| 278 | if (doomed > 0) { |
| 279 | register int cind = cindent(); |
| 280 | |
| 281 | physdc(cind, cind + doomed); |
| 282 | doomed = 0; |
| 283 | } |
| 284 | i = vreopen(LINE(vcline), lineDOT(), vcline); |
| 285 | } |
| 286 | |
| 287 | /* |
| 288 | * All done unless we are continuing on to another line. |
| 289 | */ |
| 290 | if (escape != '\n') |
| 291 | break; |
| 292 | |
| 293 | /* |
| 294 | * Set up for the new line. |
| 295 | * First save the current line, then construct a new |
| 296 | * first image for the continuation line consisting |
| 297 | * of any new autoindent plus the pushed ahead text. |
| 298 | */ |
| 299 | killU(); |
| 300 | addtext(gobblebl ? " " : "\n"); |
| 301 | vsave(); |
| 302 | cnt = 1; |
| 303 | if (value(AUTOINDENT)) { |
| 304 | #ifdef LISPCODE |
| 305 | if (value(LISP)) |
| 306 | indent = lindent(dot + 1); |
| 307 | else |
| 308 | #endif |
| 309 | if (!HADUP && vaifirst) |
| 310 | indent = whitecnt(linebuf); |
| 311 | vaifirst = 0; |
| 312 | strcLIN(vpastwh(gcursor + 1)); |
| 313 | gcursor = genindent(indent); |
| 314 | *gcursor = 0; |
| 315 | if (gcursor + strlen(linebuf) > &genbuf[LBSIZE - 2]) |
| 316 | gcursor = genbuf; |
| 317 | CP(gcursor, linebuf); |
| 318 | } else { |
| 319 | CP(genbuf, gcursor + 1); |
| 320 | gcursor = genbuf; |
| 321 | } |
| 322 | |
| 323 | /* |
| 324 | * If we started out as a single line operation and are now |
| 325 | * turning into a multi-line change, then we had better yank |
| 326 | * out dot before it changes so that undo will work |
| 327 | * correctly later. |
| 328 | */ |
| 329 | if (vundkind == VCHNG) { |
| 330 | vremote(1, yank, 0); |
| 331 | undap1--; |
| 332 | } |
| 333 | |
| 334 | /* |
| 335 | * Now do the append of the new line in the buffer, |
| 336 | * and update the display. If slowopen |
| 337 | * we don't do very much. |
| 338 | */ |
| 339 | vdoappend(genbuf); |
| 340 | vundkind = VMANYINS; |
| 341 | vcline++; |
| 342 | if (state != VISUAL) |
| 343 | vshow(dot, NOLINE); |
| 344 | else { |
| 345 | i += LINE(vcline - 1); |
| 346 | vopen(dot, i); |
| 347 | if (value(SLOWOPEN)) |
| 348 | vscrap(); |
| 349 | else |
| 350 | vsync1(LINE(vcline)); |
| 351 | } |
| 352 | strcLIN(gcursor); |
| 353 | *gcursor = 0; |
| 354 | cursor = linebuf; |
| 355 | vgotoCL(qcolumn(cursor - 1, genbuf)); |
| 356 | } |
| 357 | |
| 358 | /* |
| 359 | * All done with insertion, position the cursor |
| 360 | * and sync the screen. |
| 361 | */ |
| 362 | hold = oldhold; |
| 363 | if (cursor > linebuf) |
| 364 | cursor--; |
| 365 | if (state != HARDOPEN) |
| 366 | vsyncCL(); |
| 367 | else if (cursor > linebuf) |
| 368 | back1(); |
| 369 | doomed = 0; |
| 370 | wcursor = cursor; |
| 371 | vmove(); |
| 372 | } |
| 373 | |
| 374 | /* |
| 375 | * Subroutine for vgetline to back up a single character position, |
| 376 | * backwards around end of lines (vgoto can't hack columns which are |
| 377 | * less than 0 in general). |
| 378 | */ |
| 379 | back1() |
| 380 | { |
| 381 | |
| 382 | vgoto(destline - 1, WCOLS + destcol - 1); |
| 383 | } |
| 384 | |
| 385 | /* |
| 386 | * Get a line into genbuf after gcursor. |
| 387 | * Cnt limits the number of input characters |
| 388 | * accepted and is used for handling the replace |
| 389 | * single character command. Aescaped is the location |
| 390 | * where we stick a termination indicator (whether we |
| 391 | * ended with an ESCAPE or a newline/return. |
| 392 | * |
| 393 | * We do erase-kill type processing here and also |
| 394 | * are careful about the way we do this so that it is |
| 395 | * repeatable. (I.e. so that your kill doesn't happen, |
| 396 | * when you repeat an insert if it was escaped with \ the |
| 397 | * first time you did it. |
| 398 | */ |
| 399 | char * |
| 400 | vgetline(cnt, gcursor, aescaped) |
| 401 | int cnt; |
| 402 | register char *gcursor; |
| 403 | bool *aescaped; |
| 404 | { |
| 405 | register int c, ch; |
| 406 | register char *cp; |
| 407 | int x, y, iwhite; |
| 408 | char *iglobp; |
| 409 | int (*OO)() = Outchar; |
| 410 | |
| 411 | /* |
| 412 | * Clear the output state and counters |
| 413 | * for autoindent backwards motion (counts of ^D, etc.) |
| 414 | * Remember how much white space at beginning of line so |
| 415 | * as not to allow backspace over autoindent. |
| 416 | */ |
| 417 | *aescaped = 0; |
| 418 | ogcursor = gcursor; |
| 419 | flusho(); |
| 420 | CDCNT = 0; |
| 421 | HADUP = 0; |
| 422 | HADZERO = 0; |
| 423 | gobbled = 0; |
| 424 | iwhite = whitecnt(genbuf); |
| 425 | iglobp = vglobp; |
| 426 | |
| 427 | /* |
| 428 | * Carefully avoid using vinschar in the echo area. |
| 429 | */ |
| 430 | if (splitw) |
| 431 | Outchar = vputchar; |
| 432 | else { |
| 433 | Outchar = vinschar; |
| 434 | vprepins(); |
| 435 | } |
| 436 | for (;;) { |
| 437 | if (gobblebl) |
| 438 | gobblebl--; |
| 439 | if (cnt != 0) { |
| 440 | cnt--; |
| 441 | if (cnt == 0) |
| 442 | goto vadone; |
| 443 | } |
| 444 | ch = c = getkey() & (QUOTE|TRIM); |
| 445 | if (value(MAPINPUT)) |
| 446 | while ((ch = map(c, arrows)) != c) |
| 447 | c = ch; |
| 448 | if (!iglobp) { |
| 449 | |
| 450 | /* |
| 451 | * Erase-kill type processing. |
| 452 | * Only happens if we were not reading |
| 453 | * from untyped input when we started. |
| 454 | * Map users erase to ^H, kill to -1 for switch. |
| 455 | */ |
| 456 | if (c == tty.sg_erase) |
| 457 | c = CTRL(h); |
| 458 | else if (c == tty.sg_kill) |
| 459 | c = -1; |
| 460 | switch (c) { |
| 461 | |
| 462 | /* |
| 463 | * ^? Interrupt drops you back to visual |
| 464 | * command mode with an unread interrupt |
| 465 | * still in the input buffer. |
| 466 | * |
| 467 | * ^\ Quit does the same as interrupt. |
| 468 | * If you are a ex command rather than |
| 469 | * a vi command this will drop you |
| 470 | * back to command mode for sure. |
| 471 | */ |
| 472 | case ATTN: |
| 473 | case QUIT: |
| 474 | ungetkey(c); |
| 475 | goto vadone; |
| 476 | |
| 477 | /* |
| 478 | * ^H Backs up a character in the input. |
| 479 | * |
| 480 | * BUG: Can't back around line boundaries. |
| 481 | * This is hard because stuff has |
| 482 | * already been saved for repeat. |
| 483 | */ |
| 484 | case CTRL(h): |
| 485 | bakchar: |
| 486 | cp = gcursor - 1; |
| 487 | if (cp < ogcursor) { |
| 488 | if (splitw) { |
| 489 | /* |
| 490 | * Backspacing over readecho |
| 491 | * prompt. Pretend delete but |
| 492 | * don't beep. |
| 493 | */ |
| 494 | ungetkey(c); |
| 495 | goto vadone; |
| 496 | } |
| 497 | beep(); |
| 498 | continue; |
| 499 | } |
| 500 | goto vbackup; |
| 501 | |
| 502 | /* |
| 503 | * ^W Back up a white/non-white word. |
| 504 | */ |
| 505 | case CTRL(w): |
| 506 | wdkind = 1; |
| 507 | for (cp = gcursor; cp > ogcursor && isspace(cp[-1]); cp--) |
| 508 | continue; |
| 509 | for (c = wordch(cp - 1); |
| 510 | cp > ogcursor && wordof(c, cp - 1); cp--) |
| 511 | continue; |
| 512 | goto vbackup; |
| 513 | |
| 514 | /* |
| 515 | * users kill Kill input on this line, back to |
| 516 | * the autoindent. |
| 517 | */ |
| 518 | case -1: |
| 519 | cp = ogcursor; |
| 520 | vbackup: |
| 521 | if (cp == gcursor) { |
| 522 | beep(); |
| 523 | continue; |
| 524 | } |
| 525 | endim(); |
| 526 | *cp = 0; |
| 527 | c = cindent(); |
| 528 | vgotoCL(qcolumn(cursor - 1, genbuf)); |
| 529 | if (doomed >= 0) |
| 530 | doomed += c - cindent(); |
| 531 | gcursor = cp; |
| 532 | continue; |
| 533 | |
| 534 | /* |
| 535 | * \ Followed by erase or kill |
| 536 | * maps to just the erase or kill. |
| 537 | */ |
| 538 | case '\\': |
| 539 | x = destcol, y = destline; |
| 540 | putchar('\\'); |
| 541 | vcsync(); |
| 542 | c = getkey(); |
| 543 | if (c == tty.sg_erase || c == tty.sg_kill) { |
| 544 | vgoto(y, x); |
| 545 | if (doomed >= 0) |
| 546 | doomed++; |
| 547 | goto def; |
| 548 | } |
| 549 | ungetkey(c), c = '\\'; |
| 550 | goto noput; |
| 551 | |
| 552 | /* |
| 553 | * ^Q Super quote following character |
| 554 | * Only ^@ is verboten (trapped at |
| 555 | * a lower level) and \n forces a line |
| 556 | * split so doesn't really go in. |
| 557 | * |
| 558 | * ^V Synonym for ^Q |
| 559 | */ |
| 560 | case CTRL(q): |
| 561 | case CTRL(v): |
| 562 | x = destcol, y = destline; |
| 563 | putchar('^'); |
| 564 | vgoto(y, x); |
| 565 | c = getkey(); |
| 566 | #ifdef TIOCSETC |
| 567 | if (c == ATTN) |
| 568 | c = nttyc.t_intrc; |
| 569 | #endif |
| 570 | if (c != NL) { |
| 571 | if (doomed >= 0) |
| 572 | doomed++; |
| 573 | goto def; |
| 574 | } |
| 575 | break; |
| 576 | } |
| 577 | } |
| 578 | |
| 579 | /* |
| 580 | * If we get a blank not in the echo area |
| 581 | * consider splitting the window in the wrapmargin. |
| 582 | */ |
| 583 | if (c == ' ' && !splitw) { |
| 584 | if (gobblebl) { |
| 585 | gobbled = 1; |
| 586 | continue; |
| 587 | } |
| 588 | if (value(WRAPMARGIN) && outcol >= OCOLUMNS - value(WRAPMARGIN)) { |
| 589 | c = NL; |
| 590 | gobblebl = 2; |
| 591 | } |
| 592 | } |
| 593 | switch (c) { |
| 594 | |
| 595 | /* |
| 596 | * ^M Except in repeat maps to \n. |
| 597 | */ |
| 598 | case CR: |
| 599 | if (vglobp) |
| 600 | goto def; |
| 601 | c = '\n'; |
| 602 | /* presto chango ... */ |
| 603 | |
| 604 | /* |
| 605 | * \n Start new line. |
| 606 | */ |
| 607 | case NL: |
| 608 | *aescaped = c; |
| 609 | goto vadone; |
| 610 | |
| 611 | /* |
| 612 | * escape End insert unless repeat and more to repeat. |
| 613 | */ |
| 614 | case ESCAPE: |
| 615 | if (lastvgk) |
| 616 | goto def; |
| 617 | goto vadone; |
| 618 | |
| 619 | /* |
| 620 | * ^D Backtab. |
| 621 | * ^T Software forward tab. |
| 622 | * |
| 623 | * Unless in repeat where this means these |
| 624 | * were superquoted in. |
| 625 | */ |
| 626 | case CTRL(d): |
| 627 | case CTRL(t): |
| 628 | if (vglobp) |
| 629 | goto def; |
| 630 | /* fall into ... */ |
| 631 | |
| 632 | /* |
| 633 | * ^D|QUOTE Is a backtab (in a repeated command). |
| 634 | */ |
| 635 | case CTRL(d) | QUOTE: |
| 636 | *gcursor = 0; |
| 637 | cp = vpastwh(genbuf); |
| 638 | c = whitecnt(genbuf); |
| 639 | if (ch == CTRL(t)) { |
| 640 | /* |
| 641 | * ^t just generates new indent replacing |
| 642 | * current white space rounded up to soft |
| 643 | * tab stop increment. |
| 644 | */ |
| 645 | if (cp != gcursor) |
| 646 | /* |
| 647 | * BUG: Don't hack ^T except |
| 648 | * right after initial |
| 649 | * white space. |
| 650 | */ |
| 651 | continue; |
| 652 | cp = genindent(iwhite = backtab(c + value(SHIFTWIDTH) + 1)); |
| 653 | ogcursor = cp; |
| 654 | goto vbackup; |
| 655 | } |
| 656 | /* |
| 657 | * ^D works only if we are at the (end of) the |
| 658 | * generated autoindent. We count the ^D for repeat |
| 659 | * purposes. |
| 660 | */ |
| 661 | if (c == iwhite && c != 0) |
| 662 | if (cp == gcursor) { |
| 663 | iwhite = backtab(c); |
| 664 | CDCNT++; |
| 665 | ogcursor = cp = genindent(iwhite); |
| 666 | goto vbackup; |
| 667 | } else if (&cp[1] == gcursor && |
| 668 | (*cp == '^' || *cp == '0')) { |
| 669 | /* |
| 670 | * ^^D moves to margin, then back |
| 671 | * to current indent on next line. |
| 672 | * |
| 673 | * 0^D moves to margin and then |
| 674 | * stays there. |
| 675 | */ |
| 676 | HADZERO = *cp == '0'; |
| 677 | ogcursor = cp = genbuf; |
| 678 | HADUP = 1 - HADZERO; |
| 679 | CDCNT = 1; |
| 680 | endim(); |
| 681 | back1(); |
| 682 | vputc(' '); |
| 683 | goto vbackup; |
| 684 | } |
| 685 | if (vglobp && vglobp - iglobp >= 2 && |
| 686 | (vglobp[-2] == '^' || vglobp[-2] == '0') |
| 687 | && gcursor == ogcursor + 1) |
| 688 | goto bakchar; |
| 689 | continue; |
| 690 | |
| 691 | default: |
| 692 | /* |
| 693 | * Possibly discard control inputs. |
| 694 | */ |
| 695 | if (!vglobp && junk(c)) { |
| 696 | beep(); |
| 697 | continue; |
| 698 | } |
| 699 | def: |
| 700 | putchar(c); |
| 701 | noput: |
| 702 | if (gcursor > &genbuf[LBSIZE - 2]) |
| 703 | error("Line too long"); |
| 704 | *gcursor++ = c & TRIM; |
| 705 | vcsync(); |
| 706 | #ifdef LISPCODE |
| 707 | if (value(SHOWMATCH) && !iglobp) |
| 708 | if (c == ')' || c == '}') |
| 709 | lsmatch(gcursor); |
| 710 | #endif |
| 711 | continue; |
| 712 | } |
| 713 | } |
| 714 | vadone: |
| 715 | *gcursor = 0; |
| 716 | Outchar = OO; |
| 717 | endim(); |
| 718 | return (gcursor); |
| 719 | } |
| 720 | |
| 721 | int vgetsplit(); |
| 722 | char *vsplitpt; |
| 723 | |
| 724 | /* |
| 725 | * Append the line in buffer at lp |
| 726 | * to the buffer after dot. |
| 727 | */ |
| 728 | vdoappend(lp) |
| 729 | char *lp; |
| 730 | { |
| 731 | register int oing = inglobal; |
| 732 | |
| 733 | vsplitpt = lp; |
| 734 | inglobal = 1; |
| 735 | ignore(append(vgetsplit, dot)); |
| 736 | inglobal = oing; |
| 737 | } |
| 738 | |
| 739 | /* |
| 740 | * Subroutine for vdoappend to pass to append. |
| 741 | */ |
| 742 | vgetsplit() |
| 743 | { |
| 744 | |
| 745 | if (vsplitpt == 0) |
| 746 | return (EOF); |
| 747 | strcLIN(vsplitpt); |
| 748 | vsplitpt = 0; |
| 749 | return (0); |
| 750 | } |
| 751 | |
| 752 | /* |
| 753 | * Vmaxrep determines the maximum repetitition factor |
| 754 | * allowed that will yield total line length less than |
| 755 | * LBSIZE characters and also does hacks for the R command. |
| 756 | */ |
| 757 | vmaxrep(ch, cnt) |
| 758 | char ch; |
| 759 | register int cnt; |
| 760 | { |
| 761 | register int len, replen; |
| 762 | |
| 763 | if (cnt > LBSIZE - 2) |
| 764 | cnt = LBSIZE - 2; |
| 765 | replen = strlen(genbuf); |
| 766 | if (ch == 'R') { |
| 767 | len = strlen(cursor); |
| 768 | if (replen < len) |
| 769 | len = replen; |
| 770 | CP(cursor, cursor + len); |
| 771 | vUD2 += len; |
| 772 | } |
| 773 | len = strlen(linebuf); |
| 774 | if (len + cnt * replen <= LBSIZE - 2) |
| 775 | return (cnt); |
| 776 | cnt = (LBSIZE - 2 - len) / replen; |
| 777 | if (cnt == 0) { |
| 778 | vsave(); |
| 779 | error("Line too long"); |
| 780 | } |
| 781 | return (cnt); |
| 782 | } |