Commit | Line | Data |
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19d73a0e DF |
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 | |
5a6c967e | 8 | static char *sccsid = "@(#)ex_voper.c 7.5 (Berkeley) %G%"; |
19d73a0e DF |
9 | #endif not lint |
10 | ||
e4283c49 MH |
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; | |
887e3e0d | 39 | line *odot; |
e4283c49 | 40 | static char lastFKND, lastFCHR; |
b8c3ed58 | 41 | short d; |
e4283c49 MH |
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': | |
d266c416 | 117 | vmacchng(1); |
04379bab | 118 | vrep(cnt); |
e4283c49 MH |
119 | return; |
120 | ||
121 | default: | |
122 | goto nocount; | |
123 | } | |
d266c416 | 124 | vmacchng(1); |
e4283c49 MH |
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 & ' '; | |
5a6c967e | 164 | forbid(lfind(2, cnt, opf, (line *) 0) < 0); |
e4283c49 MH |
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: | |
5a6c967e | 181 | forbid(lfind(3, cnt - 1, opf, (line *) 0) < 0); |
e4283c49 MH |
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); | |
f0f2d980 MH |
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 | |
e4283c49 MH |
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); | |
10499a70 | 260 | forbid (Xhadcnt); |
e4283c49 MH |
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); | |
887e3e0d | 277 | i = lastFCHR; |
e4283c49 MH |
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; | |
887e3e0d | 297 | i = lastFCHR; |
e4283c49 MH |
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': | |
887e3e0d MH |
316 | if (!subop) { |
317 | i = getesc(); | |
318 | if (i == 0) | |
319 | return; | |
e4283c49 | 320 | *lastcp++ = i; |
887e3e0d | 321 | } |
e4283c49 MH |
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; | |
d266c416 | 430 | vmacchng(1); |
e4283c49 MH |
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); | |
10499a70 | 575 | forbid (Xhadcnt); |
e4283c49 MH |
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 '?': | |
10499a70 | 612 | forbid (Xhadcnt); |
e4283c49 MH |
613 | vsave(); |
614 | ocurs = cursor; | |
887e3e0d | 615 | odot = dot; |
e4283c49 MH |
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; | |
887e3e0d MH |
622 | d = peekc; |
623 | fromsemi: | |
624 | ungetchar(0); | |
625 | fixech(); | |
e4283c49 MH |
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 | |
887e3e0d | 641 | slerr: |
e4283c49 | 642 | globp = oglobp; |
887e3e0d MH |
643 | dot = odot; |
644 | cursor = ocurs; | |
e4283c49 MH |
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; | |
887e3e0d MH |
655 | if (*globp == ';') { |
656 | /* /foo/;/bar/ */ | |
657 | globp++; | |
658 | dot = addr; | |
659 | cursor = loc1; | |
660 | goto fromsemi; | |
661 | } | |
662 | dot = odot; | |
e4283c49 MH |
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'; | |
887e3e0d | 672 | if (any(*globp, "^+-.")) |
e4283c49 | 673 | c = *globp++; |
887e3e0d MH |
674 | if (*globp) { |
675 | /* random junk after the pattern */ | |
676 | beep(); | |
677 | goto slerr; | |
678 | } | |
e4283c49 MH |
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); | |
5a6c967e | 718 | flusho(); |
e4283c49 MH |
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 | } |