Commit | Line | Data |
---|---|---|
299f2784 | 1 | /* Copyright (c) 1981 Regents of the University of California */ |
b8c3ed58 | 2 | static char *sccsid = "@(#)ex_voper.c 7.2 %G%"; |
e4283c49 MH |
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; | |
887e3e0d | 31 | line *odot; |
e4283c49 | 32 | static char lastFKND, lastFCHR; |
b8c3ed58 | 33 | short d; |
e4283c49 MH |
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': | |
d266c416 | 109 | vmacchng(1); |
04379bab | 110 | vrep(cnt); |
e4283c49 MH |
111 | return; |
112 | ||
113 | default: | |
114 | goto nocount; | |
115 | } | |
d266c416 | 116 | vmacchng(1); |
e4283c49 MH |
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); | |
f0f2d980 MH |
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 | |
e4283c49 MH |
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); | |
10499a70 | 252 | forbid (Xhadcnt); |
e4283c49 MH |
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); | |
887e3e0d | 269 | i = lastFCHR; |
e4283c49 MH |
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; | |
887e3e0d | 289 | i = lastFCHR; |
e4283c49 MH |
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': | |
887e3e0d MH |
308 | if (!subop) { |
309 | i = getesc(); | |
310 | if (i == 0) | |
311 | return; | |
e4283c49 | 312 | *lastcp++ = i; |
887e3e0d | 313 | } |
e4283c49 MH |
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; | |
d266c416 | 422 | vmacchng(1); |
e4283c49 MH |
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); | |
10499a70 | 567 | forbid (Xhadcnt); |
e4283c49 MH |
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 '?': | |
10499a70 | 604 | forbid (Xhadcnt); |
e4283c49 MH |
605 | vsave(); |
606 | ocurs = cursor; | |
887e3e0d | 607 | odot = dot; |
e4283c49 MH |
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; | |
887e3e0d MH |
614 | d = peekc; |
615 | fromsemi: | |
616 | ungetchar(0); | |
617 | fixech(); | |
e4283c49 MH |
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 | |
887e3e0d | 633 | slerr: |
e4283c49 | 634 | globp = oglobp; |
887e3e0d MH |
635 | dot = odot; |
636 | cursor = ocurs; | |
e4283c49 MH |
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; | |
887e3e0d MH |
647 | if (*globp == ';') { |
648 | /* /foo/;/bar/ */ | |
649 | globp++; | |
650 | dot = addr; | |
651 | cursor = loc1; | |
652 | goto fromsemi; | |
653 | } | |
654 | dot = odot; | |
e4283c49 MH |
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'; | |
887e3e0d | 664 | if (any(*globp, "^+-.")) |
e4283c49 | 665 | c = *globp++; |
887e3e0d MH |
666 | if (*globp) { |
667 | /* random junk after the pattern */ | |
668 | beep(); | |
669 | goto slerr; | |
670 | } | |
e4283c49 MH |
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 | } |