| 1 | /* Copyright (c) 1981 Regents of the University of California */ |
| 2 | static char *sccsid = "@(#)ex_voper.c 7.2 %G%"; |
| 3 | #include "ex.h" |
| 4 | #include "ex_tty.h" |
| 5 | #include "ex_vis.h" |
| 6 | |
| 7 | #define blank() isspace(wcursor[0]) |
| 8 | #define forbid(a) if (a) goto errlab; |
| 9 | |
| 10 | char vscandir[2] = { '/', 0 }; |
| 11 | |
| 12 | /* |
| 13 | * Decode an operator/operand type command. |
| 14 | * Eventually we switch to an operator subroutine in ex_vops.c. |
| 15 | * The work here is setting up a function variable to point |
| 16 | * to the routine we want, and manipulation of the variables |
| 17 | * wcursor and wdot, which mark the other end of the affected |
| 18 | * area. If wdot is zero, then the current line is the other end, |
| 19 | * and if wcursor is zero, then the first non-blank location of the |
| 20 | * other line is implied. |
| 21 | */ |
| 22 | operate(c, cnt) |
| 23 | register int c, cnt; |
| 24 | { |
| 25 | register int i; |
| 26 | int (*moveop)(), (*deleteop)(); |
| 27 | register int (*opf)(); |
| 28 | bool subop = 0; |
| 29 | char *oglobp, *ocurs; |
| 30 | register line *addr; |
| 31 | line *odot; |
| 32 | static char lastFKND, lastFCHR; |
| 33 | short d; |
| 34 | |
| 35 | moveop = vmove, deleteop = vdelete; |
| 36 | wcursor = cursor; |
| 37 | wdot = NOLINE; |
| 38 | notecnt = 0; |
| 39 | dir = 1; |
| 40 | switch (c) { |
| 41 | |
| 42 | /* |
| 43 | * d delete operator. |
| 44 | */ |
| 45 | case 'd': |
| 46 | moveop = vdelete; |
| 47 | deleteop = beep; |
| 48 | break; |
| 49 | |
| 50 | /* |
| 51 | * s substitute characters, like c\040, i.e. change space. |
| 52 | */ |
| 53 | case 's': |
| 54 | ungetkey(' '); |
| 55 | subop++; |
| 56 | /* fall into ... */ |
| 57 | |
| 58 | /* |
| 59 | * c Change operator. |
| 60 | */ |
| 61 | case 'c': |
| 62 | if (c == 'c' && workcmd[0] == 'C' || workcmd[0] == 'S') |
| 63 | subop++; |
| 64 | moveop = vchange; |
| 65 | deleteop = beep; |
| 66 | break; |
| 67 | |
| 68 | /* |
| 69 | * ! Filter through a UNIX command. |
| 70 | */ |
| 71 | case '!': |
| 72 | moveop = vfilter; |
| 73 | deleteop = beep; |
| 74 | break; |
| 75 | |
| 76 | /* |
| 77 | * y Yank operator. Place specified text so that it |
| 78 | * can be put back with p/P. Also yanks to named buffers. |
| 79 | */ |
| 80 | case 'y': |
| 81 | moveop = vyankit; |
| 82 | deleteop = beep; |
| 83 | break; |
| 84 | |
| 85 | /* |
| 86 | * = Reformat operator (for LISP). |
| 87 | */ |
| 88 | #ifdef LISPCODE |
| 89 | case '=': |
| 90 | forbid(!value(LISP)); |
| 91 | /* fall into ... */ |
| 92 | #endif |
| 93 | |
| 94 | /* |
| 95 | * > Right shift operator. |
| 96 | * < Left shift operator. |
| 97 | */ |
| 98 | case '<': |
| 99 | case '>': |
| 100 | moveop = vshftop; |
| 101 | deleteop = beep; |
| 102 | break; |
| 103 | |
| 104 | /* |
| 105 | * r Replace character under cursor with single following |
| 106 | * character. |
| 107 | */ |
| 108 | case 'r': |
| 109 | vmacchng(1); |
| 110 | vrep(cnt); |
| 111 | return; |
| 112 | |
| 113 | default: |
| 114 | goto nocount; |
| 115 | } |
| 116 | vmacchng(1); |
| 117 | /* |
| 118 | * Had an operator, so accept another count. |
| 119 | * Multiply counts together. |
| 120 | */ |
| 121 | if (isdigit(peekkey()) && peekkey() != '0') { |
| 122 | cnt *= vgetcnt(); |
| 123 | Xcnt = cnt; |
| 124 | forbid (cnt <= 0); |
| 125 | } |
| 126 | |
| 127 | /* |
| 128 | * Get next character, mapping it and saving as |
| 129 | * part of command for repeat. |
| 130 | */ |
| 131 | c = map(getesc(),arrows); |
| 132 | if (c == 0) |
| 133 | return; |
| 134 | if (!subop) |
| 135 | *lastcp++ = c; |
| 136 | nocount: |
| 137 | opf = moveop; |
| 138 | switch (c) { |
| 139 | |
| 140 | /* |
| 141 | * b Back up a word. |
| 142 | * B Back up a word, liberal definition. |
| 143 | */ |
| 144 | case 'b': |
| 145 | case 'B': |
| 146 | dir = -1; |
| 147 | /* fall into ... */ |
| 148 | |
| 149 | /* |
| 150 | * w Forward a word. |
| 151 | * W Forward a word, liberal definition. |
| 152 | */ |
| 153 | case 'W': |
| 154 | case 'w': |
| 155 | wdkind = c & ' '; |
| 156 | forbid(lfind(2, cnt, opf, 0) < 0); |
| 157 | vmoving = 0; |
| 158 | break; |
| 159 | |
| 160 | /* |
| 161 | * E to end of following blank/nonblank word |
| 162 | */ |
| 163 | case 'E': |
| 164 | wdkind = 0; |
| 165 | goto ein; |
| 166 | |
| 167 | /* |
| 168 | * e To end of following word. |
| 169 | */ |
| 170 | case 'e': |
| 171 | wdkind = 1; |
| 172 | ein: |
| 173 | forbid(lfind(3, cnt - 1, opf, 0) < 0); |
| 174 | vmoving = 0; |
| 175 | break; |
| 176 | |
| 177 | /* |
| 178 | * ( Back an s-expression. |
| 179 | */ |
| 180 | case '(': |
| 181 | dir = -1; |
| 182 | /* fall into... */ |
| 183 | |
| 184 | /* |
| 185 | * ) Forward an s-expression. |
| 186 | */ |
| 187 | case ')': |
| 188 | forbid(lfind(0, cnt, opf, (line *) 0) < 0); |
| 189 | markDOT(); |
| 190 | break; |
| 191 | |
| 192 | /* |
| 193 | * { Back an s-expression, but don't stop on atoms. |
| 194 | * In text mode, a paragraph. For C, a balanced set |
| 195 | * of {}'s. |
| 196 | */ |
| 197 | case '{': |
| 198 | dir = -1; |
| 199 | /* fall into... */ |
| 200 | |
| 201 | /* |
| 202 | * } Forward an s-expression, but don't stop on atoms. |
| 203 | * In text mode, back paragraph. For C, back a balanced |
| 204 | * set of {}'s. |
| 205 | */ |
| 206 | case '}': |
| 207 | forbid(lfind(1, cnt, opf, (line *) 0) < 0); |
| 208 | markDOT(); |
| 209 | break; |
| 210 | |
| 211 | /* |
| 212 | * % To matching () or {}. If not at ( or { scan for |
| 213 | * first such after cursor on this line. |
| 214 | */ |
| 215 | case '%': |
| 216 | vsave(); |
| 217 | i = lmatchp((line *) 0); |
| 218 | #ifdef TRACE |
| 219 | if (trace) |
| 220 | fprintf(trace, "after lmatchp in %, dot=%d, wdot=%d, dol=%d\n", lineno(dot), lineno(wdot), lineno(dol)); |
| 221 | #endif |
| 222 | getDOT(); |
| 223 | forbid(!i); |
| 224 | if (opf != vmove) |
| 225 | if (dir > 0) |
| 226 | wcursor++; |
| 227 | else |
| 228 | cursor++; |
| 229 | else |
| 230 | markDOT(); |
| 231 | vmoving = 0; |
| 232 | break; |
| 233 | |
| 234 | /* |
| 235 | * [ Back to beginning of defun, i.e. an ( in column 1. |
| 236 | * For text, back to a section macro. |
| 237 | * For C, back to a { in column 1 (~~ beg of function.) |
| 238 | */ |
| 239 | case '[': |
| 240 | dir = -1; |
| 241 | /* fall into ... */ |
| 242 | |
| 243 | /* |
| 244 | * ] Forward to next defun, i.e. a ( in column 1. |
| 245 | * For text, forward section. |
| 246 | * For C, forward to a } in column 1 (if delete or such) |
| 247 | * or if a move to a { in column 1. |
| 248 | */ |
| 249 | case ']': |
| 250 | if (!vglobp) |
| 251 | forbid(getkey() != c); |
| 252 | forbid (Xhadcnt); |
| 253 | vsave(); |
| 254 | i = lbrack(c, opf); |
| 255 | getDOT(); |
| 256 | forbid(!i); |
| 257 | markDOT(); |
| 258 | if (ospeed > B300) |
| 259 | hold |= HOLDWIG; |
| 260 | break; |
| 261 | |
| 262 | /* |
| 263 | * , Invert last find with f F t or T, like inverse |
| 264 | * of ;. |
| 265 | */ |
| 266 | case ',': |
| 267 | forbid (lastFKND == 0); |
| 268 | c = isupper(lastFKND) ? tolower(lastFKND) : toupper(lastFKND); |
| 269 | i = lastFCHR; |
| 270 | if (vglobp == 0) |
| 271 | vglobp = ""; |
| 272 | subop++; |
| 273 | goto nocount; |
| 274 | |
| 275 | /* |
| 276 | * 0 To beginning of real line. |
| 277 | */ |
| 278 | case '0': |
| 279 | wcursor = linebuf; |
| 280 | vmoving = 0; |
| 281 | break; |
| 282 | |
| 283 | /* |
| 284 | * ; Repeat last find with f F t or T. |
| 285 | */ |
| 286 | case ';': |
| 287 | forbid (lastFKND == 0); |
| 288 | c = lastFKND; |
| 289 | i = lastFCHR; |
| 290 | subop++; |
| 291 | goto nocount; |
| 292 | |
| 293 | /* |
| 294 | * F Find single character before cursor in current line. |
| 295 | * T Like F, but stops before character. |
| 296 | */ |
| 297 | case 'F': /* inverted find */ |
| 298 | case 'T': |
| 299 | dir = -1; |
| 300 | /* fall into ... */ |
| 301 | |
| 302 | /* |
| 303 | * f Find single character following cursor in current line. |
| 304 | * t Like f, but stope before character. |
| 305 | */ |
| 306 | case 'f': /* find */ |
| 307 | case 't': |
| 308 | if (!subop) { |
| 309 | i = getesc(); |
| 310 | if (i == 0) |
| 311 | return; |
| 312 | *lastcp++ = i; |
| 313 | } |
| 314 | if (vglobp == 0) |
| 315 | lastFKND = c, lastFCHR = i; |
| 316 | for (; cnt > 0; cnt--) |
| 317 | forbid (find(i) == 0); |
| 318 | vmoving = 0; |
| 319 | switch (c) { |
| 320 | |
| 321 | case 'T': |
| 322 | wcursor++; |
| 323 | break; |
| 324 | |
| 325 | case 't': |
| 326 | wcursor--; |
| 327 | case 'f': |
| 328 | fixup: |
| 329 | if (moveop != vmove) |
| 330 | wcursor++; |
| 331 | break; |
| 332 | } |
| 333 | break; |
| 334 | |
| 335 | /* |
| 336 | * | Find specified print column in current line. |
| 337 | */ |
| 338 | case '|': |
| 339 | if (Pline == numbline) |
| 340 | cnt += 8; |
| 341 | vmovcol = cnt; |
| 342 | vmoving = 1; |
| 343 | wcursor = vfindcol(cnt); |
| 344 | break; |
| 345 | |
| 346 | /* |
| 347 | * ^ To beginning of non-white space on line. |
| 348 | */ |
| 349 | case '^': |
| 350 | wcursor = vskipwh(linebuf); |
| 351 | vmoving = 0; |
| 352 | break; |
| 353 | |
| 354 | /* |
| 355 | * $ To end of line. |
| 356 | */ |
| 357 | case '$': |
| 358 | if (opf == vmove) { |
| 359 | vmoving = 1; |
| 360 | vmovcol = 20000; |
| 361 | } else |
| 362 | vmoving = 0; |
| 363 | if (cnt > 1) { |
| 364 | if (opf == vmove) { |
| 365 | wcursor = 0; |
| 366 | cnt--; |
| 367 | } else |
| 368 | wcursor = linebuf; |
| 369 | /* This is wrong at EOF */ |
| 370 | wdot = dot + cnt; |
| 371 | break; |
| 372 | } |
| 373 | if (linebuf[0]) { |
| 374 | wcursor = strend(linebuf) - 1; |
| 375 | goto fixup; |
| 376 | } |
| 377 | wcursor = linebuf; |
| 378 | break; |
| 379 | |
| 380 | /* |
| 381 | * h Back a character. |
| 382 | * ^H Back a character. |
| 383 | */ |
| 384 | case 'h': |
| 385 | case CTRL(h): |
| 386 | dir = -1; |
| 387 | /* fall into ... */ |
| 388 | |
| 389 | /* |
| 390 | * space Forward a character. |
| 391 | */ |
| 392 | case 'l': |
| 393 | case ' ': |
| 394 | forbid (margin() || opf == vmove && edge()); |
| 395 | while (cnt > 0 && !margin()) |
| 396 | wcursor += dir, cnt--; |
| 397 | if (margin() && opf == vmove || wcursor < linebuf) |
| 398 | wcursor -= dir; |
| 399 | vmoving = 0; |
| 400 | break; |
| 401 | |
| 402 | /* |
| 403 | * D Delete to end of line, short for d$. |
| 404 | */ |
| 405 | case 'D': |
| 406 | cnt = INF; |
| 407 | goto deleteit; |
| 408 | |
| 409 | /* |
| 410 | * X Delete character before cursor. |
| 411 | */ |
| 412 | case 'X': |
| 413 | dir = -1; |
| 414 | /* fall into ... */ |
| 415 | deleteit: |
| 416 | /* |
| 417 | * x Delete character at cursor, leaving cursor where it is. |
| 418 | */ |
| 419 | case 'x': |
| 420 | if (margin()) |
| 421 | goto errlab; |
| 422 | vmacchng(1); |
| 423 | while (cnt > 0 && !margin()) |
| 424 | wcursor += dir, cnt--; |
| 425 | opf = deleteop; |
| 426 | vmoving = 0; |
| 427 | break; |
| 428 | |
| 429 | default: |
| 430 | /* |
| 431 | * Stuttered operators are equivalent to the operator on |
| 432 | * a line, thus turn dd into d_. |
| 433 | */ |
| 434 | if (opf == vmove || c != workcmd[0]) { |
| 435 | errlab: |
| 436 | beep(); |
| 437 | vmacp = 0; |
| 438 | return; |
| 439 | } |
| 440 | /* fall into ... */ |
| 441 | |
| 442 | /* |
| 443 | * _ Target for a line or group of lines. |
| 444 | * Stuttering is more convenient; this is mostly |
| 445 | * for aesthetics. |
| 446 | */ |
| 447 | case '_': |
| 448 | wdot = dot + cnt - 1; |
| 449 | vmoving = 0; |
| 450 | wcursor = 0; |
| 451 | break; |
| 452 | |
| 453 | /* |
| 454 | * H To first, home line on screen. |
| 455 | * Count is for count'th line rather than first. |
| 456 | */ |
| 457 | case 'H': |
| 458 | wdot = (dot - vcline) + cnt - 1; |
| 459 | if (opf == vmove) |
| 460 | markit(wdot); |
| 461 | vmoving = 0; |
| 462 | wcursor = 0; |
| 463 | break; |
| 464 | |
| 465 | /* |
| 466 | * - Backwards lines, to first non-white character. |
| 467 | */ |
| 468 | case '-': |
| 469 | wdot = dot - cnt; |
| 470 | vmoving = 0; |
| 471 | wcursor = 0; |
| 472 | break; |
| 473 | |
| 474 | /* |
| 475 | * ^P To previous line same column. Ridiculous on the |
| 476 | * console of the VAX since it puts console in LSI mode. |
| 477 | */ |
| 478 | case 'k': |
| 479 | case CTRL(p): |
| 480 | wdot = dot - cnt; |
| 481 | if (vmoving == 0) |
| 482 | vmoving = 1, vmovcol = column(cursor); |
| 483 | wcursor = 0; |
| 484 | break; |
| 485 | |
| 486 | /* |
| 487 | * L To last line on screen, or count'th line from the |
| 488 | * bottom. |
| 489 | */ |
| 490 | case 'L': |
| 491 | wdot = dot + vcnt - vcline - cnt; |
| 492 | if (opf == vmove) |
| 493 | markit(wdot); |
| 494 | vmoving = 0; |
| 495 | wcursor = 0; |
| 496 | break; |
| 497 | |
| 498 | /* |
| 499 | * M To the middle of the screen. |
| 500 | */ |
| 501 | case 'M': |
| 502 | wdot = dot + ((vcnt + 1) / 2) - vcline - 1; |
| 503 | if (opf == vmove) |
| 504 | markit(wdot); |
| 505 | vmoving = 0; |
| 506 | wcursor = 0; |
| 507 | break; |
| 508 | |
| 509 | /* |
| 510 | * + Forward line, to first non-white. |
| 511 | * |
| 512 | * CR Convenient synonym for +. |
| 513 | */ |
| 514 | case '+': |
| 515 | case CR: |
| 516 | wdot = dot + cnt; |
| 517 | vmoving = 0; |
| 518 | wcursor = 0; |
| 519 | break; |
| 520 | |
| 521 | /* |
| 522 | * ^N To next line, same column if possible. |
| 523 | * |
| 524 | * LF Linefeed is a convenient synonym for ^N. |
| 525 | */ |
| 526 | case CTRL(n): |
| 527 | case 'j': |
| 528 | case NL: |
| 529 | wdot = dot + cnt; |
| 530 | if (vmoving == 0) |
| 531 | vmoving = 1, vmovcol = column(cursor); |
| 532 | wcursor = 0; |
| 533 | break; |
| 534 | |
| 535 | /* |
| 536 | * n Search to next match of current pattern. |
| 537 | */ |
| 538 | case 'n': |
| 539 | vglobp = vscandir; |
| 540 | c = *vglobp++; |
| 541 | goto nocount; |
| 542 | |
| 543 | /* |
| 544 | * N Like n but in reverse direction. |
| 545 | */ |
| 546 | case 'N': |
| 547 | vglobp = vscandir[0] == '/' ? "?" : "/"; |
| 548 | c = *vglobp++; |
| 549 | goto nocount; |
| 550 | |
| 551 | /* |
| 552 | * ' Return to line specified by following mark, |
| 553 | * first white position on line. |
| 554 | * |
| 555 | * ` Return to marked line at remembered column. |
| 556 | */ |
| 557 | case '\'': |
| 558 | case '`': |
| 559 | d = c; |
| 560 | c = getesc(); |
| 561 | if (c == 0) |
| 562 | return; |
| 563 | c = markreg(c); |
| 564 | forbid (c == 0); |
| 565 | wdot = getmark(c); |
| 566 | forbid (wdot == NOLINE); |
| 567 | forbid (Xhadcnt); |
| 568 | vmoving = 0; |
| 569 | wcursor = d == '`' ? ncols[c - 'a'] : 0; |
| 570 | if (opf == vmove && (wdot != dot || (d == '`' && wcursor != cursor))) |
| 571 | markDOT(); |
| 572 | if (wcursor) { |
| 573 | vsave(); |
| 574 | getline(*wdot); |
| 575 | if (wcursor > strend(linebuf)) |
| 576 | wcursor = 0; |
| 577 | getDOT(); |
| 578 | } |
| 579 | if (ospeed > B300) |
| 580 | hold |= HOLDWIG; |
| 581 | break; |
| 582 | |
| 583 | /* |
| 584 | * G Goto count'th line, or last line if no count |
| 585 | * given. |
| 586 | */ |
| 587 | case 'G': |
| 588 | if (!Xhadcnt) |
| 589 | cnt = lineDOL(); |
| 590 | wdot = zero + cnt; |
| 591 | forbid (wdot < one || wdot > dol); |
| 592 | if (opf == vmove) |
| 593 | markit(wdot); |
| 594 | vmoving = 0; |
| 595 | wcursor = 0; |
| 596 | break; |
| 597 | |
| 598 | /* |
| 599 | * / Scan forward for following re. |
| 600 | * ? Scan backward for following re. |
| 601 | */ |
| 602 | case '/': |
| 603 | case '?': |
| 604 | forbid (Xhadcnt); |
| 605 | vsave(); |
| 606 | ocurs = cursor; |
| 607 | odot = dot; |
| 608 | wcursor = 0; |
| 609 | if (readecho(c)) |
| 610 | return; |
| 611 | if (!vglobp) |
| 612 | vscandir[0] = genbuf[0]; |
| 613 | oglobp = globp; CP(vutmp, genbuf); globp = vutmp; |
| 614 | d = peekc; |
| 615 | fromsemi: |
| 616 | ungetchar(0); |
| 617 | fixech(); |
| 618 | CATCH |
| 619 | #ifndef CBREAK |
| 620 | /* |
| 621 | * Lose typeahead (ick). |
| 622 | */ |
| 623 | vcook(); |
| 624 | #endif |
| 625 | addr = address(cursor); |
| 626 | #ifndef CBREAK |
| 627 | vraw(); |
| 628 | #endif |
| 629 | ONERR |
| 630 | #ifndef CBREAK |
| 631 | vraw(); |
| 632 | #endif |
| 633 | slerr: |
| 634 | globp = oglobp; |
| 635 | dot = odot; |
| 636 | cursor = ocurs; |
| 637 | ungetchar(d); |
| 638 | splitw = 0; |
| 639 | vclean(); |
| 640 | vjumpto(dot, ocurs, 0); |
| 641 | return; |
| 642 | ENDCATCH |
| 643 | if (globp == 0) |
| 644 | globp = ""; |
| 645 | else if (peekc) |
| 646 | --globp; |
| 647 | if (*globp == ';') { |
| 648 | /* /foo/;/bar/ */ |
| 649 | globp++; |
| 650 | dot = addr; |
| 651 | cursor = loc1; |
| 652 | goto fromsemi; |
| 653 | } |
| 654 | dot = odot; |
| 655 | ungetchar(d); |
| 656 | c = 0; |
| 657 | if (*globp == 'z') |
| 658 | globp++, c = '\n'; |
| 659 | if (any(*globp, "^+-.")) |
| 660 | c = *globp++; |
| 661 | i = 0; |
| 662 | while (isdigit(*globp)) |
| 663 | i = i * 10 + *globp++ - '0'; |
| 664 | if (any(*globp, "^+-.")) |
| 665 | c = *globp++; |
| 666 | if (*globp) { |
| 667 | /* random junk after the pattern */ |
| 668 | beep(); |
| 669 | goto slerr; |
| 670 | } |
| 671 | globp = oglobp; |
| 672 | splitw = 0; |
| 673 | vmoving = 0; |
| 674 | wcursor = loc1; |
| 675 | if (i != 0) |
| 676 | vsetsiz(i); |
| 677 | if (opf == vmove) { |
| 678 | if (state == ONEOPEN || state == HARDOPEN) |
| 679 | outline = destline = WBOT; |
| 680 | if (addr != dot || loc1 != cursor) |
| 681 | markDOT(); |
| 682 | if (loc1 > linebuf && *loc1 == 0) |
| 683 | loc1--; |
| 684 | if (c) |
| 685 | vjumpto(addr, loc1, c); |
| 686 | else { |
| 687 | vmoving = 0; |
| 688 | if (loc1) { |
| 689 | vmoving++; |
| 690 | vmovcol = column(loc1); |
| 691 | } |
| 692 | getDOT(); |
| 693 | if (state == CRTOPEN && addr != dot) |
| 694 | vup1(); |
| 695 | vupdown(addr - dot, NOSTR); |
| 696 | } |
| 697 | return; |
| 698 | } |
| 699 | lastcp[-1] = 'n'; |
| 700 | getDOT(); |
| 701 | wdot = addr; |
| 702 | break; |
| 703 | } |
| 704 | /* |
| 705 | * Apply. |
| 706 | */ |
| 707 | if (vreg && wdot == 0) |
| 708 | wdot = dot; |
| 709 | (*opf)(c); |
| 710 | wdot = NOLINE; |
| 711 | } |
| 712 | |
| 713 | /* |
| 714 | * Find single character c, in direction dir from cursor. |
| 715 | */ |
| 716 | find(c) |
| 717 | char c; |
| 718 | { |
| 719 | |
| 720 | for(;;) { |
| 721 | if (edge()) |
| 722 | return (0); |
| 723 | wcursor += dir; |
| 724 | if (*wcursor == c) |
| 725 | return (1); |
| 726 | } |
| 727 | } |
| 728 | |
| 729 | /* |
| 730 | * Do a word motion with operator op, and cnt more words |
| 731 | * to go after this. |
| 732 | */ |
| 733 | word(op, cnt) |
| 734 | register int (*op)(); |
| 735 | int cnt; |
| 736 | { |
| 737 | register int which; |
| 738 | register char *iwc; |
| 739 | register line *iwdot = wdot; |
| 740 | |
| 741 | if (dir == 1) { |
| 742 | iwc = wcursor; |
| 743 | which = wordch(wcursor); |
| 744 | while (wordof(which, wcursor)) { |
| 745 | if (cnt == 1 && op != vmove && wcursor[1] == 0) { |
| 746 | wcursor++; |
| 747 | break; |
| 748 | } |
| 749 | if (!lnext()) |
| 750 | return (0); |
| 751 | if (wcursor == linebuf) |
| 752 | break; |
| 753 | } |
| 754 | /* Unless last segment of a change skip blanks */ |
| 755 | if (op != vchange || cnt > 1) |
| 756 | while (!margin() && blank()) |
| 757 | wcursor++; |
| 758 | else |
| 759 | if (wcursor == iwc && iwdot == wdot && *iwc) |
| 760 | wcursor++; |
| 761 | if (op == vmove && margin()) |
| 762 | wcursor--; |
| 763 | } else { |
| 764 | if (!lnext()) |
| 765 | return (0); |
| 766 | while (blank()) |
| 767 | if (!lnext()) |
| 768 | return (0); |
| 769 | if (!margin()) { |
| 770 | which = wordch(wcursor); |
| 771 | while (!margin() && wordof(which, wcursor)) |
| 772 | wcursor--; |
| 773 | } |
| 774 | if (wcursor < linebuf || !wordof(which, wcursor)) |
| 775 | wcursor++; |
| 776 | } |
| 777 | return (1); |
| 778 | } |
| 779 | |
| 780 | /* |
| 781 | * To end of word, with operator op and cnt more motions |
| 782 | * remaining after this. |
| 783 | */ |
| 784 | eend(op) |
| 785 | register int (*op)(); |
| 786 | { |
| 787 | register int which; |
| 788 | |
| 789 | if (!lnext()) |
| 790 | return; |
| 791 | while (blank()) |
| 792 | if (!lnext()) |
| 793 | return; |
| 794 | which = wordch(wcursor); |
| 795 | while (wordof(which, wcursor)) { |
| 796 | if (wcursor[1] == 0) { |
| 797 | wcursor++; |
| 798 | break; |
| 799 | } |
| 800 | if (!lnext()) |
| 801 | return; |
| 802 | } |
| 803 | if (op != vchange && op != vdelete && wcursor > linebuf) |
| 804 | wcursor--; |
| 805 | } |
| 806 | |
| 807 | /* |
| 808 | * Wordof tells whether the character at *wc is in a word of |
| 809 | * kind which (blank/nonblank words are 0, conservative words 1). |
| 810 | */ |
| 811 | wordof(which, wc) |
| 812 | char which; |
| 813 | register char *wc; |
| 814 | { |
| 815 | |
| 816 | if (isspace(*wc)) |
| 817 | return (0); |
| 818 | return (!wdkind || wordch(wc) == which); |
| 819 | } |
| 820 | |
| 821 | /* |
| 822 | * Wordch tells whether character at *wc is a word character |
| 823 | * i.e. an alfa, digit, or underscore. |
| 824 | */ |
| 825 | wordch(wc) |
| 826 | char *wc; |
| 827 | { |
| 828 | register int c; |
| 829 | |
| 830 | c = wc[0]; |
| 831 | return (isalpha(c) || isdigit(c) || c == '_'); |
| 832 | } |
| 833 | |
| 834 | /* |
| 835 | * Edge tells when we hit the last character in the current line. |
| 836 | */ |
| 837 | edge() |
| 838 | { |
| 839 | |
| 840 | if (linebuf[0] == 0) |
| 841 | return (1); |
| 842 | if (dir == 1) |
| 843 | return (wcursor[1] == 0); |
| 844 | else |
| 845 | return (wcursor == linebuf); |
| 846 | } |
| 847 | |
| 848 | /* |
| 849 | * Margin tells us when we have fallen off the end of the line. |
| 850 | */ |
| 851 | margin() |
| 852 | { |
| 853 | |
| 854 | return (wcursor < linebuf || wcursor[0] == 0); |
| 855 | } |