| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | */ |
| 6 | |
| 7 | #ifndef lint |
| 8 | static char *sccsid = "@(#)ex_voper.c 7.5 (Berkeley) %G%"; |
| 9 | #endif not lint |
| 10 | |
| 11 | #include "ex.h" |
| 12 | #include "ex_tty.h" |
| 13 | #include "ex_vis.h" |
| 14 | |
| 15 | #define blank() isspace(wcursor[0]) |
| 16 | #define forbid(a) if (a) goto errlab; |
| 17 | |
| 18 | char vscandir[2] = { '/', 0 }; |
| 19 | |
| 20 | /* |
| 21 | * Decode an operator/operand type command. |
| 22 | * Eventually we switch to an operator subroutine in ex_vops.c. |
| 23 | * The work here is setting up a function variable to point |
| 24 | * to the routine we want, and manipulation of the variables |
| 25 | * wcursor and wdot, which mark the other end of the affected |
| 26 | * area. If wdot is zero, then the current line is the other end, |
| 27 | * and if wcursor is zero, then the first non-blank location of the |
| 28 | * other line is implied. |
| 29 | */ |
| 30 | operate(c, cnt) |
| 31 | register int c, cnt; |
| 32 | { |
| 33 | register int i; |
| 34 | int (*moveop)(), (*deleteop)(); |
| 35 | register int (*opf)(); |
| 36 | bool subop = 0; |
| 37 | char *oglobp, *ocurs; |
| 38 | register line *addr; |
| 39 | line *odot; |
| 40 | static char lastFKND, lastFCHR; |
| 41 | short d; |
| 42 | |
| 43 | moveop = vmove, deleteop = vdelete; |
| 44 | wcursor = cursor; |
| 45 | wdot = NOLINE; |
| 46 | notecnt = 0; |
| 47 | dir = 1; |
| 48 | switch (c) { |
| 49 | |
| 50 | /* |
| 51 | * d delete operator. |
| 52 | */ |
| 53 | case 'd': |
| 54 | moveop = vdelete; |
| 55 | deleteop = beep; |
| 56 | break; |
| 57 | |
| 58 | /* |
| 59 | * s substitute characters, like c\040, i.e. change space. |
| 60 | */ |
| 61 | case 's': |
| 62 | ungetkey(' '); |
| 63 | subop++; |
| 64 | /* fall into ... */ |
| 65 | |
| 66 | /* |
| 67 | * c Change operator. |
| 68 | */ |
| 69 | case 'c': |
| 70 | if (c == 'c' && workcmd[0] == 'C' || workcmd[0] == 'S') |
| 71 | subop++; |
| 72 | moveop = vchange; |
| 73 | deleteop = beep; |
| 74 | break; |
| 75 | |
| 76 | /* |
| 77 | * ! Filter through a UNIX command. |
| 78 | */ |
| 79 | case '!': |
| 80 | moveop = vfilter; |
| 81 | deleteop = beep; |
| 82 | break; |
| 83 | |
| 84 | /* |
| 85 | * y Yank operator. Place specified text so that it |
| 86 | * can be put back with p/P. Also yanks to named buffers. |
| 87 | */ |
| 88 | case 'y': |
| 89 | moveop = vyankit; |
| 90 | deleteop = beep; |
| 91 | break; |
| 92 | |
| 93 | /* |
| 94 | * = Reformat operator (for LISP). |
| 95 | */ |
| 96 | #ifdef LISPCODE |
| 97 | case '=': |
| 98 | forbid(!value(LISP)); |
| 99 | /* fall into ... */ |
| 100 | #endif |
| 101 | |
| 102 | /* |
| 103 | * > Right shift operator. |
| 104 | * < Left shift operator. |
| 105 | */ |
| 106 | case '<': |
| 107 | case '>': |
| 108 | moveop = vshftop; |
| 109 | deleteop = beep; |
| 110 | break; |
| 111 | |
| 112 | /* |
| 113 | * r Replace character under cursor with single following |
| 114 | * character. |
| 115 | */ |
| 116 | case 'r': |
| 117 | vmacchng(1); |
| 118 | vrep(cnt); |
| 119 | return; |
| 120 | |
| 121 | default: |
| 122 | goto nocount; |
| 123 | } |
| 124 | vmacchng(1); |
| 125 | /* |
| 126 | * Had an operator, so accept another count. |
| 127 | * Multiply counts together. |
| 128 | */ |
| 129 | if (isdigit(peekkey()) && peekkey() != '0') { |
| 130 | cnt *= vgetcnt(); |
| 131 | Xcnt = cnt; |
| 132 | forbid (cnt <= 0); |
| 133 | } |
| 134 | |
| 135 | /* |
| 136 | * Get next character, mapping it and saving as |
| 137 | * part of command for repeat. |
| 138 | */ |
| 139 | c = map(getesc(),arrows); |
| 140 | if (c == 0) |
| 141 | return; |
| 142 | if (!subop) |
| 143 | *lastcp++ = c; |
| 144 | nocount: |
| 145 | opf = moveop; |
| 146 | switch (c) { |
| 147 | |
| 148 | /* |
| 149 | * b Back up a word. |
| 150 | * B Back up a word, liberal definition. |
| 151 | */ |
| 152 | case 'b': |
| 153 | case 'B': |
| 154 | dir = -1; |
| 155 | /* fall into ... */ |
| 156 | |
| 157 | /* |
| 158 | * w Forward a word. |
| 159 | * W Forward a word, liberal definition. |
| 160 | */ |
| 161 | case 'W': |
| 162 | case 'w': |
| 163 | wdkind = c & ' '; |
| 164 | forbid(lfind(2, cnt, opf, (line *) 0) < 0); |
| 165 | vmoving = 0; |
| 166 | break; |
| 167 | |
| 168 | /* |
| 169 | * E to end of following blank/nonblank word |
| 170 | */ |
| 171 | case 'E': |
| 172 | wdkind = 0; |
| 173 | goto ein; |
| 174 | |
| 175 | /* |
| 176 | * e To end of following word. |
| 177 | */ |
| 178 | case 'e': |
| 179 | wdkind = 1; |
| 180 | ein: |
| 181 | forbid(lfind(3, cnt - 1, opf, (line *) 0) < 0); |
| 182 | vmoving = 0; |
| 183 | break; |
| 184 | |
| 185 | /* |
| 186 | * ( Back an s-expression. |
| 187 | */ |
| 188 | case '(': |
| 189 | dir = -1; |
| 190 | /* fall into... */ |
| 191 | |
| 192 | /* |
| 193 | * ) Forward an s-expression. |
| 194 | */ |
| 195 | case ')': |
| 196 | forbid(lfind(0, cnt, opf, (line *) 0) < 0); |
| 197 | markDOT(); |
| 198 | break; |
| 199 | |
| 200 | /* |
| 201 | * { Back an s-expression, but don't stop on atoms. |
| 202 | * In text mode, a paragraph. For C, a balanced set |
| 203 | * of {}'s. |
| 204 | */ |
| 205 | case '{': |
| 206 | dir = -1; |
| 207 | /* fall into... */ |
| 208 | |
| 209 | /* |
| 210 | * } Forward an s-expression, but don't stop on atoms. |
| 211 | * In text mode, back paragraph. For C, back a balanced |
| 212 | * set of {}'s. |
| 213 | */ |
| 214 | case '}': |
| 215 | forbid(lfind(1, cnt, opf, (line *) 0) < 0); |
| 216 | markDOT(); |
| 217 | break; |
| 218 | |
| 219 | /* |
| 220 | * % To matching () or {}. If not at ( or { scan for |
| 221 | * first such after cursor on this line. |
| 222 | */ |
| 223 | case '%': |
| 224 | vsave(); |
| 225 | i = lmatchp((line *) 0); |
| 226 | #ifdef TRACE |
| 227 | if (trace) |
| 228 | fprintf(trace, "after lmatchp in %, dot=%d, wdot=%d, dol=%d\n", lineno(dot), lineno(wdot), lineno(dol)); |
| 229 | #endif |
| 230 | getDOT(); |
| 231 | forbid(!i); |
| 232 | if (opf != vmove) |
| 233 | if (dir > 0) |
| 234 | wcursor++; |
| 235 | else |
| 236 | cursor++; |
| 237 | else |
| 238 | markDOT(); |
| 239 | vmoving = 0; |
| 240 | break; |
| 241 | |
| 242 | /* |
| 243 | * [ Back to beginning of defun, i.e. an ( in column 1. |
| 244 | * For text, back to a section macro. |
| 245 | * For C, back to a { in column 1 (~~ beg of function.) |
| 246 | */ |
| 247 | case '[': |
| 248 | dir = -1; |
| 249 | /* fall into ... */ |
| 250 | |
| 251 | /* |
| 252 | * ] Forward to next defun, i.e. a ( in column 1. |
| 253 | * For text, forward section. |
| 254 | * For C, forward to a } in column 1 (if delete or such) |
| 255 | * or if a move to a { in column 1. |
| 256 | */ |
| 257 | case ']': |
| 258 | if (!vglobp) |
| 259 | forbid(getkey() != c); |
| 260 | forbid (Xhadcnt); |
| 261 | vsave(); |
| 262 | i = lbrack(c, opf); |
| 263 | getDOT(); |
| 264 | forbid(!i); |
| 265 | markDOT(); |
| 266 | if (ospeed > B300) |
| 267 | hold |= HOLDWIG; |
| 268 | break; |
| 269 | |
| 270 | /* |
| 271 | * , Invert last find with f F t or T, like inverse |
| 272 | * of ;. |
| 273 | */ |
| 274 | case ',': |
| 275 | forbid (lastFKND == 0); |
| 276 | c = isupper(lastFKND) ? tolower(lastFKND) : toupper(lastFKND); |
| 277 | i = lastFCHR; |
| 278 | if (vglobp == 0) |
| 279 | vglobp = ""; |
| 280 | subop++; |
| 281 | goto nocount; |
| 282 | |
| 283 | /* |
| 284 | * 0 To beginning of real line. |
| 285 | */ |
| 286 | case '0': |
| 287 | wcursor = linebuf; |
| 288 | vmoving = 0; |
| 289 | break; |
| 290 | |
| 291 | /* |
| 292 | * ; Repeat last find with f F t or T. |
| 293 | */ |
| 294 | case ';': |
| 295 | forbid (lastFKND == 0); |
| 296 | c = lastFKND; |
| 297 | i = lastFCHR; |
| 298 | subop++; |
| 299 | goto nocount; |
| 300 | |
| 301 | /* |
| 302 | * F Find single character before cursor in current line. |
| 303 | * T Like F, but stops before character. |
| 304 | */ |
| 305 | case 'F': /* inverted find */ |
| 306 | case 'T': |
| 307 | dir = -1; |
| 308 | /* fall into ... */ |
| 309 | |
| 310 | /* |
| 311 | * f Find single character following cursor in current line. |
| 312 | * t Like f, but stope before character. |
| 313 | */ |
| 314 | case 'f': /* find */ |
| 315 | case 't': |
| 316 | if (!subop) { |
| 317 | i = getesc(); |
| 318 | if (i == 0) |
| 319 | return; |
| 320 | *lastcp++ = i; |
| 321 | } |
| 322 | if (vglobp == 0) |
| 323 | lastFKND = c, lastFCHR = i; |
| 324 | for (; cnt > 0; cnt--) |
| 325 | forbid (find(i) == 0); |
| 326 | vmoving = 0; |
| 327 | switch (c) { |
| 328 | |
| 329 | case 'T': |
| 330 | wcursor++; |
| 331 | break; |
| 332 | |
| 333 | case 't': |
| 334 | wcursor--; |
| 335 | case 'f': |
| 336 | fixup: |
| 337 | if (moveop != vmove) |
| 338 | wcursor++; |
| 339 | break; |
| 340 | } |
| 341 | break; |
| 342 | |
| 343 | /* |
| 344 | * | Find specified print column in current line. |
| 345 | */ |
| 346 | case '|': |
| 347 | if (Pline == numbline) |
| 348 | cnt += 8; |
| 349 | vmovcol = cnt; |
| 350 | vmoving = 1; |
| 351 | wcursor = vfindcol(cnt); |
| 352 | break; |
| 353 | |
| 354 | /* |
| 355 | * ^ To beginning of non-white space on line. |
| 356 | */ |
| 357 | case '^': |
| 358 | wcursor = vskipwh(linebuf); |
| 359 | vmoving = 0; |
| 360 | break; |
| 361 | |
| 362 | /* |
| 363 | * $ To end of line. |
| 364 | */ |
| 365 | case '$': |
| 366 | if (opf == vmove) { |
| 367 | vmoving = 1; |
| 368 | vmovcol = 20000; |
| 369 | } else |
| 370 | vmoving = 0; |
| 371 | if (cnt > 1) { |
| 372 | if (opf == vmove) { |
| 373 | wcursor = 0; |
| 374 | cnt--; |
| 375 | } else |
| 376 | wcursor = linebuf; |
| 377 | /* This is wrong at EOF */ |
| 378 | wdot = dot + cnt; |
| 379 | break; |
| 380 | } |
| 381 | if (linebuf[0]) { |
| 382 | wcursor = strend(linebuf) - 1; |
| 383 | goto fixup; |
| 384 | } |
| 385 | wcursor = linebuf; |
| 386 | break; |
| 387 | |
| 388 | /* |
| 389 | * h Back a character. |
| 390 | * ^H Back a character. |
| 391 | */ |
| 392 | case 'h': |
| 393 | case CTRL(h): |
| 394 | dir = -1; |
| 395 | /* fall into ... */ |
| 396 | |
| 397 | /* |
| 398 | * space Forward a character. |
| 399 | */ |
| 400 | case 'l': |
| 401 | case ' ': |
| 402 | forbid (margin() || opf == vmove && edge()); |
| 403 | while (cnt > 0 && !margin()) |
| 404 | wcursor += dir, cnt--; |
| 405 | if (margin() && opf == vmove || wcursor < linebuf) |
| 406 | wcursor -= dir; |
| 407 | vmoving = 0; |
| 408 | break; |
| 409 | |
| 410 | /* |
| 411 | * D Delete to end of line, short for d$. |
| 412 | */ |
| 413 | case 'D': |
| 414 | cnt = INF; |
| 415 | goto deleteit; |
| 416 | |
| 417 | /* |
| 418 | * X Delete character before cursor. |
| 419 | */ |
| 420 | case 'X': |
| 421 | dir = -1; |
| 422 | /* fall into ... */ |
| 423 | deleteit: |
| 424 | /* |
| 425 | * x Delete character at cursor, leaving cursor where it is. |
| 426 | */ |
| 427 | case 'x': |
| 428 | if (margin()) |
| 429 | goto errlab; |
| 430 | vmacchng(1); |
| 431 | while (cnt > 0 && !margin()) |
| 432 | wcursor += dir, cnt--; |
| 433 | opf = deleteop; |
| 434 | vmoving = 0; |
| 435 | break; |
| 436 | |
| 437 | default: |
| 438 | /* |
| 439 | * Stuttered operators are equivalent to the operator on |
| 440 | * a line, thus turn dd into d_. |
| 441 | */ |
| 442 | if (opf == vmove || c != workcmd[0]) { |
| 443 | errlab: |
| 444 | beep(); |
| 445 | vmacp = 0; |
| 446 | return; |
| 447 | } |
| 448 | /* fall into ... */ |
| 449 | |
| 450 | /* |
| 451 | * _ Target for a line or group of lines. |
| 452 | * Stuttering is more convenient; this is mostly |
| 453 | * for aesthetics. |
| 454 | */ |
| 455 | case '_': |
| 456 | wdot = dot + cnt - 1; |
| 457 | vmoving = 0; |
| 458 | wcursor = 0; |
| 459 | break; |
| 460 | |
| 461 | /* |
| 462 | * H To first, home line on screen. |
| 463 | * Count is for count'th line rather than first. |
| 464 | */ |
| 465 | case 'H': |
| 466 | wdot = (dot - vcline) + cnt - 1; |
| 467 | if (opf == vmove) |
| 468 | markit(wdot); |
| 469 | vmoving = 0; |
| 470 | wcursor = 0; |
| 471 | break; |
| 472 | |
| 473 | /* |
| 474 | * - Backwards lines, to first non-white character. |
| 475 | */ |
| 476 | case '-': |
| 477 | wdot = dot - cnt; |
| 478 | vmoving = 0; |
| 479 | wcursor = 0; |
| 480 | break; |
| 481 | |
| 482 | /* |
| 483 | * ^P To previous line same column. Ridiculous on the |
| 484 | * console of the VAX since it puts console in LSI mode. |
| 485 | */ |
| 486 | case 'k': |
| 487 | case CTRL(p): |
| 488 | wdot = dot - cnt; |
| 489 | if (vmoving == 0) |
| 490 | vmoving = 1, vmovcol = column(cursor); |
| 491 | wcursor = 0; |
| 492 | break; |
| 493 | |
| 494 | /* |
| 495 | * L To last line on screen, or count'th line from the |
| 496 | * bottom. |
| 497 | */ |
| 498 | case 'L': |
| 499 | wdot = dot + vcnt - vcline - cnt; |
| 500 | if (opf == vmove) |
| 501 | markit(wdot); |
| 502 | vmoving = 0; |
| 503 | wcursor = 0; |
| 504 | break; |
| 505 | |
| 506 | /* |
| 507 | * M To the middle of the screen. |
| 508 | */ |
| 509 | case 'M': |
| 510 | wdot = dot + ((vcnt + 1) / 2) - vcline - 1; |
| 511 | if (opf == vmove) |
| 512 | markit(wdot); |
| 513 | vmoving = 0; |
| 514 | wcursor = 0; |
| 515 | break; |
| 516 | |
| 517 | /* |
| 518 | * + Forward line, to first non-white. |
| 519 | * |
| 520 | * CR Convenient synonym for +. |
| 521 | */ |
| 522 | case '+': |
| 523 | case CR: |
| 524 | wdot = dot + cnt; |
| 525 | vmoving = 0; |
| 526 | wcursor = 0; |
| 527 | break; |
| 528 | |
| 529 | /* |
| 530 | * ^N To next line, same column if possible. |
| 531 | * |
| 532 | * LF Linefeed is a convenient synonym for ^N. |
| 533 | */ |
| 534 | case CTRL(n): |
| 535 | case 'j': |
| 536 | case NL: |
| 537 | wdot = dot + cnt; |
| 538 | if (vmoving == 0) |
| 539 | vmoving = 1, vmovcol = column(cursor); |
| 540 | wcursor = 0; |
| 541 | break; |
| 542 | |
| 543 | /* |
| 544 | * n Search to next match of current pattern. |
| 545 | */ |
| 546 | case 'n': |
| 547 | vglobp = vscandir; |
| 548 | c = *vglobp++; |
| 549 | goto nocount; |
| 550 | |
| 551 | /* |
| 552 | * N Like n but in reverse direction. |
| 553 | */ |
| 554 | case 'N': |
| 555 | vglobp = vscandir[0] == '/' ? "?" : "/"; |
| 556 | c = *vglobp++; |
| 557 | goto nocount; |
| 558 | |
| 559 | /* |
| 560 | * ' Return to line specified by following mark, |
| 561 | * first white position on line. |
| 562 | * |
| 563 | * ` Return to marked line at remembered column. |
| 564 | */ |
| 565 | case '\'': |
| 566 | case '`': |
| 567 | d = c; |
| 568 | c = getesc(); |
| 569 | if (c == 0) |
| 570 | return; |
| 571 | c = markreg(c); |
| 572 | forbid (c == 0); |
| 573 | wdot = getmark(c); |
| 574 | forbid (wdot == NOLINE); |
| 575 | forbid (Xhadcnt); |
| 576 | vmoving = 0; |
| 577 | wcursor = d == '`' ? ncols[c - 'a'] : 0; |
| 578 | if (opf == vmove && (wdot != dot || (d == '`' && wcursor != cursor))) |
| 579 | markDOT(); |
| 580 | if (wcursor) { |
| 581 | vsave(); |
| 582 | getline(*wdot); |
| 583 | if (wcursor > strend(linebuf)) |
| 584 | wcursor = 0; |
| 585 | getDOT(); |
| 586 | } |
| 587 | if (ospeed > B300) |
| 588 | hold |= HOLDWIG; |
| 589 | break; |
| 590 | |
| 591 | /* |
| 592 | * G Goto count'th line, or last line if no count |
| 593 | * given. |
| 594 | */ |
| 595 | case 'G': |
| 596 | if (!Xhadcnt) |
| 597 | cnt = lineDOL(); |
| 598 | wdot = zero + cnt; |
| 599 | forbid (wdot < one || wdot > dol); |
| 600 | if (opf == vmove) |
| 601 | markit(wdot); |
| 602 | vmoving = 0; |
| 603 | wcursor = 0; |
| 604 | break; |
| 605 | |
| 606 | /* |
| 607 | * / Scan forward for following re. |
| 608 | * ? Scan backward for following re. |
| 609 | */ |
| 610 | case '/': |
| 611 | case '?': |
| 612 | forbid (Xhadcnt); |
| 613 | vsave(); |
| 614 | ocurs = cursor; |
| 615 | odot = dot; |
| 616 | wcursor = 0; |
| 617 | if (readecho(c)) |
| 618 | return; |
| 619 | if (!vglobp) |
| 620 | vscandir[0] = genbuf[0]; |
| 621 | oglobp = globp; CP(vutmp, genbuf); globp = vutmp; |
| 622 | d = peekc; |
| 623 | fromsemi: |
| 624 | ungetchar(0); |
| 625 | fixech(); |
| 626 | CATCH |
| 627 | #ifndef CBREAK |
| 628 | /* |
| 629 | * Lose typeahead (ick). |
| 630 | */ |
| 631 | vcook(); |
| 632 | #endif |
| 633 | addr = address(cursor); |
| 634 | #ifndef CBREAK |
| 635 | vraw(); |
| 636 | #endif |
| 637 | ONERR |
| 638 | #ifndef CBREAK |
| 639 | vraw(); |
| 640 | #endif |
| 641 | slerr: |
| 642 | globp = oglobp; |
| 643 | dot = odot; |
| 644 | cursor = ocurs; |
| 645 | ungetchar(d); |
| 646 | splitw = 0; |
| 647 | vclean(); |
| 648 | vjumpto(dot, ocurs, 0); |
| 649 | return; |
| 650 | ENDCATCH |
| 651 | if (globp == 0) |
| 652 | globp = ""; |
| 653 | else if (peekc) |
| 654 | --globp; |
| 655 | if (*globp == ';') { |
| 656 | /* /foo/;/bar/ */ |
| 657 | globp++; |
| 658 | dot = addr; |
| 659 | cursor = loc1; |
| 660 | goto fromsemi; |
| 661 | } |
| 662 | dot = odot; |
| 663 | ungetchar(d); |
| 664 | c = 0; |
| 665 | if (*globp == 'z') |
| 666 | globp++, c = '\n'; |
| 667 | if (any(*globp, "^+-.")) |
| 668 | c = *globp++; |
| 669 | i = 0; |
| 670 | while (isdigit(*globp)) |
| 671 | i = i * 10 + *globp++ - '0'; |
| 672 | if (any(*globp, "^+-.")) |
| 673 | c = *globp++; |
| 674 | if (*globp) { |
| 675 | /* random junk after the pattern */ |
| 676 | beep(); |
| 677 | goto slerr; |
| 678 | } |
| 679 | globp = oglobp; |
| 680 | splitw = 0; |
| 681 | vmoving = 0; |
| 682 | wcursor = loc1; |
| 683 | if (i != 0) |
| 684 | vsetsiz(i); |
| 685 | if (opf == vmove) { |
| 686 | if (state == ONEOPEN || state == HARDOPEN) |
| 687 | outline = destline = WBOT; |
| 688 | if (addr != dot || loc1 != cursor) |
| 689 | markDOT(); |
| 690 | if (loc1 > linebuf && *loc1 == 0) |
| 691 | loc1--; |
| 692 | if (c) |
| 693 | vjumpto(addr, loc1, c); |
| 694 | else { |
| 695 | vmoving = 0; |
| 696 | if (loc1) { |
| 697 | vmoving++; |
| 698 | vmovcol = column(loc1); |
| 699 | } |
| 700 | getDOT(); |
| 701 | if (state == CRTOPEN && addr != dot) |
| 702 | vup1(); |
| 703 | vupdown(addr - dot, NOSTR); |
| 704 | } |
| 705 | return; |
| 706 | } |
| 707 | lastcp[-1] = 'n'; |
| 708 | getDOT(); |
| 709 | wdot = addr; |
| 710 | break; |
| 711 | } |
| 712 | /* |
| 713 | * Apply. |
| 714 | */ |
| 715 | if (vreg && wdot == 0) |
| 716 | wdot = dot; |
| 717 | (*opf)(c); |
| 718 | flusho(); |
| 719 | wdot = NOLINE; |
| 720 | } |
| 721 | |
| 722 | /* |
| 723 | * Find single character c, in direction dir from cursor. |
| 724 | */ |
| 725 | find(c) |
| 726 | char c; |
| 727 | { |
| 728 | |
| 729 | for(;;) { |
| 730 | if (edge()) |
| 731 | return (0); |
| 732 | wcursor += dir; |
| 733 | if (*wcursor == c) |
| 734 | return (1); |
| 735 | } |
| 736 | } |
| 737 | |
| 738 | /* |
| 739 | * Do a word motion with operator op, and cnt more words |
| 740 | * to go after this. |
| 741 | */ |
| 742 | word(op, cnt) |
| 743 | register int (*op)(); |
| 744 | int cnt; |
| 745 | { |
| 746 | register int which; |
| 747 | register char *iwc; |
| 748 | register line *iwdot = wdot; |
| 749 | |
| 750 | if (dir == 1) { |
| 751 | iwc = wcursor; |
| 752 | which = wordch(wcursor); |
| 753 | while (wordof(which, wcursor)) { |
| 754 | if (cnt == 1 && op != vmove && wcursor[1] == 0) { |
| 755 | wcursor++; |
| 756 | break; |
| 757 | } |
| 758 | if (!lnext()) |
| 759 | return (0); |
| 760 | if (wcursor == linebuf) |
| 761 | break; |
| 762 | } |
| 763 | /* Unless last segment of a change skip blanks */ |
| 764 | if (op != vchange || cnt > 1) |
| 765 | while (!margin() && blank()) |
| 766 | wcursor++; |
| 767 | else |
| 768 | if (wcursor == iwc && iwdot == wdot && *iwc) |
| 769 | wcursor++; |
| 770 | if (op == vmove && margin()) |
| 771 | wcursor--; |
| 772 | } else { |
| 773 | if (!lnext()) |
| 774 | return (0); |
| 775 | while (blank()) |
| 776 | if (!lnext()) |
| 777 | return (0); |
| 778 | if (!margin()) { |
| 779 | which = wordch(wcursor); |
| 780 | while (!margin() && wordof(which, wcursor)) |
| 781 | wcursor--; |
| 782 | } |
| 783 | if (wcursor < linebuf || !wordof(which, wcursor)) |
| 784 | wcursor++; |
| 785 | } |
| 786 | return (1); |
| 787 | } |
| 788 | |
| 789 | /* |
| 790 | * To end of word, with operator op and cnt more motions |
| 791 | * remaining after this. |
| 792 | */ |
| 793 | eend(op) |
| 794 | register int (*op)(); |
| 795 | { |
| 796 | register int which; |
| 797 | |
| 798 | if (!lnext()) |
| 799 | return; |
| 800 | while (blank()) |
| 801 | if (!lnext()) |
| 802 | return; |
| 803 | which = wordch(wcursor); |
| 804 | while (wordof(which, wcursor)) { |
| 805 | if (wcursor[1] == 0) { |
| 806 | wcursor++; |
| 807 | break; |
| 808 | } |
| 809 | if (!lnext()) |
| 810 | return; |
| 811 | } |
| 812 | if (op != vchange && op != vdelete && wcursor > linebuf) |
| 813 | wcursor--; |
| 814 | } |
| 815 | |
| 816 | /* |
| 817 | * Wordof tells whether the character at *wc is in a word of |
| 818 | * kind which (blank/nonblank words are 0, conservative words 1). |
| 819 | */ |
| 820 | wordof(which, wc) |
| 821 | char which; |
| 822 | register char *wc; |
| 823 | { |
| 824 | |
| 825 | if (isspace(*wc)) |
| 826 | return (0); |
| 827 | return (!wdkind || wordch(wc) == which); |
| 828 | } |
| 829 | |
| 830 | /* |
| 831 | * Wordch tells whether character at *wc is a word character |
| 832 | * i.e. an alfa, digit, or underscore. |
| 833 | */ |
| 834 | wordch(wc) |
| 835 | char *wc; |
| 836 | { |
| 837 | register int c; |
| 838 | |
| 839 | c = wc[0]; |
| 840 | return (isalpha(c) || isdigit(c) || c == '_'); |
| 841 | } |
| 842 | |
| 843 | /* |
| 844 | * Edge tells when we hit the last character in the current line. |
| 845 | */ |
| 846 | edge() |
| 847 | { |
| 848 | |
| 849 | if (linebuf[0] == 0) |
| 850 | return (1); |
| 851 | if (dir == 1) |
| 852 | return (wcursor[1] == 0); |
| 853 | else |
| 854 | return (wcursor == linebuf); |
| 855 | } |
| 856 | |
| 857 | /* |
| 858 | * Margin tells us when we have fallen off the end of the line. |
| 859 | */ |
| 860 | margin() |
| 861 | { |
| 862 | |
| 863 | return (wcursor < linebuf || wcursor[0] == 0); |
| 864 | } |