Commit | Line | Data |
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e4283c49 MH |
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 | #define blank() isspace(wcursor[0]) | |
7 | #define forbid(a) if (a) goto errlab; | |
8 | ||
9 | char vscandir[2] = { '/', 0 }; | |
10 | ||
11 | /* | |
12 | * Decode an operator/operand type command. | |
13 | * Eventually we switch to an operator subroutine in ex_vops.c. | |
14 | * The work here is setting up a function variable to point | |
15 | * to the routine we want, and manipulation of the variables | |
16 | * wcursor and wdot, which mark the other end of the affected | |
17 | * area. If wdot is zero, then the current line is the other end, | |
18 | * and if wcursor is zero, then the first non-blank location of the | |
19 | * other line is implied. | |
20 | */ | |
21 | operate(c, cnt) | |
22 | register int c, cnt; | |
23 | { | |
24 | register int i; | |
25 | int (*moveop)(), (*deleteop)(); | |
26 | register int (*opf)(); | |
27 | bool subop = 0; | |
28 | char *oglobp, *ocurs; | |
29 | register line *addr; | |
887e3e0d | 30 | line *odot; |
e4283c49 MH |
31 | static char lastFKND, lastFCHR; |
32 | char d; | |
33 | ||
34 | moveop = vmove, deleteop = vdelete; | |
35 | wcursor = cursor; | |
36 | wdot = NOLINE; | |
37 | notecnt = 0; | |
38 | dir = 1; | |
39 | switch (c) { | |
40 | ||
41 | /* | |
42 | * d delete operator. | |
43 | */ | |
44 | case 'd': | |
45 | moveop = vdelete; | |
46 | deleteop = beep; | |
47 | break; | |
48 | ||
49 | /* | |
50 | * s substitute characters, like c\040, i.e. change space. | |
51 | */ | |
52 | case 's': | |
53 | ungetkey(' '); | |
54 | subop++; | |
55 | /* fall into ... */ | |
56 | ||
57 | /* | |
58 | * c Change operator. | |
59 | */ | |
60 | case 'c': | |
61 | if (c == 'c' && workcmd[0] == 'C' || workcmd[0] == 'S') | |
62 | subop++; | |
63 | moveop = vchange; | |
64 | deleteop = beep; | |
65 | break; | |
66 | ||
67 | /* | |
68 | * ! Filter through a UNIX command. | |
69 | */ | |
70 | case '!': | |
71 | moveop = vfilter; | |
72 | deleteop = beep; | |
73 | break; | |
74 | ||
75 | /* | |
76 | * y Yank operator. Place specified text so that it | |
77 | * can be put back with p/P. Also yanks to named buffers. | |
78 | */ | |
79 | case 'y': | |
80 | moveop = vyankit; | |
81 | deleteop = beep; | |
82 | break; | |
83 | ||
84 | /* | |
85 | * = Reformat operator (for LISP). | |
86 | */ | |
87 | #ifdef LISPCODE | |
88 | case '=': | |
89 | forbid(!value(LISP)); | |
90 | /* fall into ... */ | |
91 | #endif | |
92 | ||
93 | /* | |
94 | * > Right shift operator. | |
95 | * < Left shift operator. | |
96 | */ | |
97 | case '<': | |
98 | case '>': | |
99 | moveop = vshftop; | |
100 | deleteop = beep; | |
101 | break; | |
102 | ||
103 | /* | |
104 | * r Replace character under cursor with single following | |
105 | * character. | |
106 | */ | |
107 | case 'r': | |
108 | vrep(cnt); | |
d266c416 | 109 | vmacchng(1); |
e4283c49 MH |
110 | return; |
111 | ||
112 | default: | |
113 | goto nocount; | |
114 | } | |
d266c416 | 115 | vmacchng(1); |
e4283c49 MH |
116 | /* |
117 | * Had an operator, so accept another count. | |
118 | * Multiply counts together. | |
119 | */ | |
120 | if (isdigit(peekkey()) && peekkey() != '0') { | |
121 | cnt *= vgetcnt(); | |
122 | Xcnt = cnt; | |
123 | forbid (cnt <= 0); | |
124 | } | |
125 | ||
126 | /* | |
127 | * Get next character, mapping it and saving as | |
128 | * part of command for repeat. | |
129 | */ | |
130 | c = map(getesc(),arrows); | |
131 | if (c == 0) | |
132 | return; | |
133 | if (!subop) | |
134 | *lastcp++ = c; | |
135 | nocount: | |
136 | opf = moveop; | |
137 | switch (c) { | |
138 | ||
139 | /* | |
140 | * b Back up a word. | |
141 | * B Back up a word, liberal definition. | |
142 | */ | |
143 | case 'b': | |
144 | case 'B': | |
145 | dir = -1; | |
146 | /* fall into ... */ | |
147 | ||
148 | /* | |
149 | * w Forward a word. | |
150 | * W Forward a word, liberal definition. | |
151 | */ | |
152 | case 'W': | |
153 | case 'w': | |
154 | wdkind = c & ' '; | |
155 | forbid(lfind(2, cnt, opf, 0) < 0); | |
156 | vmoving = 0; | |
157 | break; | |
158 | ||
159 | /* | |
160 | * E to end of following blank/nonblank word | |
161 | */ | |
162 | case 'E': | |
163 | wdkind = 0; | |
164 | goto ein; | |
165 | ||
166 | /* | |
167 | * e To end of following word. | |
168 | */ | |
169 | case 'e': | |
170 | wdkind = 1; | |
171 | ein: | |
172 | forbid(lfind(3, cnt - 1, opf, 0) < 0); | |
173 | vmoving = 0; | |
174 | break; | |
175 | ||
176 | /* | |
177 | * ( Back an s-expression. | |
178 | */ | |
179 | case '(': | |
180 | dir = -1; | |
181 | /* fall into... */ | |
182 | ||
183 | /* | |
184 | * ) Forward an s-expression. | |
185 | */ | |
186 | case ')': | |
187 | forbid(lfind(0, cnt, opf, (line *) 0) < 0); | |
188 | markDOT(); | |
189 | break; | |
190 | ||
191 | /* | |
192 | * { Back an s-expression, but don't stop on atoms. | |
193 | * In text mode, a paragraph. For C, a balanced set | |
194 | * of {}'s. | |
195 | */ | |
196 | case '{': | |
197 | dir = -1; | |
198 | /* fall into... */ | |
199 | ||
200 | /* | |
201 | * } Forward an s-expression, but don't stop on atoms. | |
202 | * In text mode, back paragraph. For C, back a balanced | |
203 | * set of {}'s. | |
204 | */ | |
205 | case '}': | |
206 | forbid(lfind(1, cnt, opf, (line *) 0) < 0); | |
207 | markDOT(); | |
208 | break; | |
209 | ||
210 | /* | |
211 | * % To matching () or {}. If not at ( or { scan for | |
212 | * first such after cursor on this line. | |
213 | */ | |
214 | case '%': | |
215 | vsave(); | |
216 | i = lmatchp((line *) 0); | |
217 | getDOT(); | |
218 | forbid(!i); | |
219 | if (opf != vmove) | |
220 | if (dir > 0) | |
221 | wcursor++; | |
222 | else | |
223 | cursor++; | |
224 | else | |
225 | markDOT(); | |
226 | vmoving = 0; | |
227 | break; | |
228 | ||
229 | /* | |
230 | * [ Back to beginning of defun, i.e. an ( in column 1. | |
231 | * For text, back to a section macro. | |
232 | * For C, back to a { in column 1 (~~ beg of function.) | |
233 | */ | |
234 | case '[': | |
235 | dir = -1; | |
236 | /* fall into ... */ | |
237 | ||
238 | /* | |
239 | * ] Forward to next defun, i.e. a ( in column 1. | |
240 | * For text, forward section. | |
241 | * For C, forward to a } in column 1 (if delete or such) | |
242 | * or if a move to a { in column 1. | |
243 | */ | |
244 | case ']': | |
245 | if (!vglobp) | |
246 | forbid(getkey() != c); | |
247 | if (Xhadcnt) | |
248 | vsetsiz(Xcnt); | |
249 | vsave(); | |
250 | i = lbrack(c, opf); | |
251 | getDOT(); | |
252 | forbid(!i); | |
253 | markDOT(); | |
254 | if (ospeed > B300) | |
255 | hold |= HOLDWIG; | |
256 | break; | |
257 | ||
258 | /* | |
259 | * , Invert last find with f F t or T, like inverse | |
260 | * of ;. | |
261 | */ | |
262 | case ',': | |
263 | forbid (lastFKND == 0); | |
264 | c = isupper(lastFKND) ? tolower(lastFKND) : toupper(lastFKND); | |
887e3e0d | 265 | i = lastFCHR; |
e4283c49 MH |
266 | if (vglobp == 0) |
267 | vglobp = ""; | |
268 | subop++; | |
269 | goto nocount; | |
270 | ||
271 | /* | |
272 | * 0 To beginning of real line. | |
273 | */ | |
274 | case '0': | |
275 | wcursor = linebuf; | |
276 | vmoving = 0; | |
277 | break; | |
278 | ||
279 | /* | |
280 | * ; Repeat last find with f F t or T. | |
281 | */ | |
282 | case ';': | |
283 | forbid (lastFKND == 0); | |
284 | c = lastFKND; | |
887e3e0d | 285 | i = lastFCHR; |
e4283c49 MH |
286 | subop++; |
287 | goto nocount; | |
288 | ||
289 | /* | |
290 | * F Find single character before cursor in current line. | |
291 | * T Like F, but stops before character. | |
292 | */ | |
293 | case 'F': /* inverted find */ | |
294 | case 'T': | |
295 | dir = -1; | |
296 | /* fall into ... */ | |
297 | ||
298 | /* | |
299 | * f Find single character following cursor in current line. | |
300 | * t Like f, but stope before character. | |
301 | */ | |
302 | case 'f': /* find */ | |
303 | case 't': | |
887e3e0d MH |
304 | if (!subop) { |
305 | i = getesc(); | |
306 | if (i == 0) | |
307 | return; | |
e4283c49 | 308 | *lastcp++ = i; |
887e3e0d | 309 | } |
e4283c49 MH |
310 | if (vglobp == 0) |
311 | lastFKND = c, lastFCHR = i; | |
312 | for (; cnt > 0; cnt--) | |
313 | forbid (find(i) == 0); | |
314 | vmoving = 0; | |
315 | switch (c) { | |
316 | ||
317 | case 'T': | |
318 | wcursor++; | |
319 | break; | |
320 | ||
321 | case 't': | |
322 | wcursor--; | |
323 | case 'f': | |
324 | fixup: | |
325 | if (moveop != vmove) | |
326 | wcursor++; | |
327 | break; | |
328 | } | |
329 | break; | |
330 | ||
331 | /* | |
332 | * | Find specified print column in current line. | |
333 | */ | |
334 | case '|': | |
335 | if (Pline == numbline) | |
336 | cnt += 8; | |
337 | vmovcol = cnt; | |
338 | vmoving = 1; | |
339 | wcursor = vfindcol(cnt); | |
340 | break; | |
341 | ||
342 | /* | |
343 | * ^ To beginning of non-white space on line. | |
344 | */ | |
345 | case '^': | |
346 | wcursor = vskipwh(linebuf); | |
347 | vmoving = 0; | |
348 | break; | |
349 | ||
350 | /* | |
351 | * $ To end of line. | |
352 | */ | |
353 | case '$': | |
354 | if (opf == vmove) { | |
355 | vmoving = 1; | |
356 | vmovcol = 20000; | |
357 | } else | |
358 | vmoving = 0; | |
359 | if (cnt > 1) { | |
360 | if (opf == vmove) { | |
361 | wcursor = 0; | |
362 | cnt--; | |
363 | } else | |
364 | wcursor = linebuf; | |
365 | /* This is wrong at EOF */ | |
366 | wdot = dot + cnt; | |
367 | break; | |
368 | } | |
369 | if (linebuf[0]) { | |
370 | wcursor = strend(linebuf) - 1; | |
371 | goto fixup; | |
372 | } | |
373 | wcursor = linebuf; | |
374 | break; | |
375 | ||
376 | /* | |
377 | * h Back a character. | |
378 | * ^H Back a character. | |
379 | */ | |
380 | case 'h': | |
381 | case CTRL(h): | |
382 | dir = -1; | |
383 | /* fall into ... */ | |
384 | ||
385 | /* | |
386 | * space Forward a character. | |
387 | */ | |
388 | case 'l': | |
389 | case ' ': | |
390 | forbid (margin() || opf == vmove && edge()); | |
391 | while (cnt > 0 && !margin()) | |
392 | wcursor += dir, cnt--; | |
393 | if (margin() && opf == vmove || wcursor < linebuf) | |
394 | wcursor -= dir; | |
395 | vmoving = 0; | |
396 | break; | |
397 | ||
398 | /* | |
399 | * D Delete to end of line, short for d$. | |
400 | */ | |
401 | case 'D': | |
402 | cnt = INF; | |
403 | goto deleteit; | |
404 | ||
405 | /* | |
406 | * X Delete character before cursor. | |
407 | */ | |
408 | case 'X': | |
409 | dir = -1; | |
410 | /* fall into ... */ | |
411 | deleteit: | |
412 | /* | |
413 | * x Delete character at cursor, leaving cursor where it is. | |
414 | */ | |
415 | case 'x': | |
416 | if (margin()) | |
417 | goto errlab; | |
d266c416 | 418 | vmacchng(1); |
e4283c49 MH |
419 | while (cnt > 0 && !margin()) |
420 | wcursor += dir, cnt--; | |
421 | opf = deleteop; | |
422 | vmoving = 0; | |
423 | break; | |
424 | ||
425 | default: | |
426 | /* | |
427 | * Stuttered operators are equivalent to the operator on | |
428 | * a line, thus turn dd into d_. | |
429 | */ | |
430 | if (opf == vmove || c != workcmd[0]) { | |
431 | errlab: | |
432 | beep(); | |
433 | vmacp = 0; | |
434 | return; | |
435 | } | |
436 | /* fall into ... */ | |
437 | ||
438 | /* | |
439 | * _ Target for a line or group of lines. | |
440 | * Stuttering is more convenient; this is mostly | |
441 | * for aesthetics. | |
442 | */ | |
443 | case '_': | |
444 | wdot = dot + cnt - 1; | |
445 | vmoving = 0; | |
446 | wcursor = 0; | |
447 | break; | |
448 | ||
449 | /* | |
450 | * H To first, home line on screen. | |
451 | * Count is for count'th line rather than first. | |
452 | */ | |
453 | case 'H': | |
454 | wdot = (dot - vcline) + cnt - 1; | |
455 | if (opf == vmove) | |
456 | markit(wdot); | |
457 | vmoving = 0; | |
458 | wcursor = 0; | |
459 | break; | |
460 | ||
461 | /* | |
462 | * - Backwards lines, to first non-white character. | |
463 | */ | |
464 | case '-': | |
465 | wdot = dot - cnt; | |
466 | vmoving = 0; | |
467 | wcursor = 0; | |
468 | break; | |
469 | ||
470 | /* | |
471 | * ^P To previous line same column. Ridiculous on the | |
472 | * console of the VAX since it puts console in LSI mode. | |
473 | */ | |
474 | case 'k': | |
475 | case CTRL(p): | |
476 | wdot = dot - cnt; | |
477 | if (vmoving == 0) | |
478 | vmoving = 1, vmovcol = column(cursor); | |
479 | wcursor = 0; | |
480 | break; | |
481 | ||
482 | /* | |
483 | * L To last line on screen, or count'th line from the | |
484 | * bottom. | |
485 | */ | |
486 | case 'L': | |
487 | wdot = dot + vcnt - vcline - cnt; | |
488 | if (opf == vmove) | |
489 | markit(wdot); | |
490 | vmoving = 0; | |
491 | wcursor = 0; | |
492 | break; | |
493 | ||
494 | /* | |
495 | * M To the middle of the screen. | |
496 | */ | |
497 | case 'M': | |
498 | wdot = dot + ((vcnt + 1) / 2) - vcline - 1; | |
499 | if (opf == vmove) | |
500 | markit(wdot); | |
501 | vmoving = 0; | |
502 | wcursor = 0; | |
503 | break; | |
504 | ||
505 | /* | |
506 | * + Forward line, to first non-white. | |
507 | * | |
508 | * CR Convenient synonym for +. | |
509 | */ | |
510 | case '+': | |
511 | case CR: | |
512 | wdot = dot + cnt; | |
513 | vmoving = 0; | |
514 | wcursor = 0; | |
515 | break; | |
516 | ||
517 | /* | |
518 | * ^N To next line, same column if possible. | |
519 | * | |
520 | * LF Linefeed is a convenient synonym for ^N. | |
521 | */ | |
522 | case CTRL(n): | |
523 | case 'j': | |
524 | case NL: | |
525 | wdot = dot + cnt; | |
526 | if (vmoving == 0) | |
527 | vmoving = 1, vmovcol = column(cursor); | |
528 | wcursor = 0; | |
529 | break; | |
530 | ||
531 | /* | |
532 | * n Search to next match of current pattern. | |
533 | */ | |
534 | case 'n': | |
535 | vglobp = vscandir; | |
536 | c = *vglobp++; | |
537 | goto nocount; | |
538 | ||
539 | /* | |
540 | * N Like n but in reverse direction. | |
541 | */ | |
542 | case 'N': | |
543 | vglobp = vscandir[0] == '/' ? "?" : "/"; | |
544 | c = *vglobp++; | |
545 | goto nocount; | |
546 | ||
547 | /* | |
548 | * ' Return to line specified by following mark, | |
549 | * first white position on line. | |
550 | * | |
551 | * ` Return to marked line at remembered column. | |
552 | */ | |
553 | case '\'': | |
554 | case '`': | |
555 | d = c; | |
556 | c = getesc(); | |
557 | if (c == 0) | |
558 | return; | |
559 | c = markreg(c); | |
560 | forbid (c == 0); | |
561 | wdot = getmark(c); | |
562 | forbid (wdot == NOLINE); | |
563 | if (Xhadcnt) | |
564 | vsetsiz(Xcnt); | |
565 | vmoving = 0; | |
566 | wcursor = d == '`' ? ncols[c - 'a'] : 0; | |
567 | if (opf == vmove && (wdot != dot || (d == '`' && wcursor != cursor))) | |
568 | markDOT(); | |
569 | if (wcursor) { | |
570 | vsave(); | |
571 | getline(*wdot); | |
572 | if (wcursor > strend(linebuf)) | |
573 | wcursor = 0; | |
574 | getDOT(); | |
575 | } | |
576 | if (ospeed > B300) | |
577 | hold |= HOLDWIG; | |
578 | break; | |
579 | ||
580 | /* | |
581 | * G Goto count'th line, or last line if no count | |
582 | * given. | |
583 | */ | |
584 | case 'G': | |
585 | if (!Xhadcnt) | |
586 | cnt = lineDOL(); | |
587 | wdot = zero + cnt; | |
588 | forbid (wdot < one || wdot > dol); | |
589 | if (opf == vmove) | |
590 | markit(wdot); | |
591 | vmoving = 0; | |
592 | wcursor = 0; | |
593 | break; | |
594 | ||
595 | /* | |
596 | * / Scan forward for following re. | |
597 | * ? Scan backward for following re. | |
598 | */ | |
599 | case '/': | |
600 | case '?': | |
601 | if (Xhadcnt) | |
602 | vsetsiz(Xcnt); | |
603 | vsave(); | |
604 | ocurs = cursor; | |
887e3e0d | 605 | odot = dot; |
e4283c49 MH |
606 | wcursor = 0; |
607 | if (readecho(c)) | |
608 | return; | |
609 | if (!vglobp) | |
610 | vscandir[0] = genbuf[0]; | |
611 | oglobp = globp; CP(vutmp, genbuf); globp = vutmp; | |
887e3e0d MH |
612 | d = peekc; |
613 | fromsemi: | |
614 | ungetchar(0); | |
615 | fixech(); | |
e4283c49 MH |
616 | CATCH |
617 | #ifndef CBREAK | |
618 | /* | |
619 | * Lose typeahead (ick). | |
620 | */ | |
621 | vcook(); | |
622 | #endif | |
623 | addr = address(cursor); | |
624 | #ifndef CBREAK | |
625 | vraw(); | |
626 | #endif | |
627 | ONERR | |
628 | #ifndef CBREAK | |
629 | vraw(); | |
630 | #endif | |
887e3e0d | 631 | slerr: |
e4283c49 | 632 | globp = oglobp; |
887e3e0d MH |
633 | dot = odot; |
634 | cursor = ocurs; | |
e4283c49 MH |
635 | ungetchar(d); |
636 | splitw = 0; | |
637 | vclean(); | |
638 | vjumpto(dot, ocurs, 0); | |
639 | return; | |
640 | ENDCATCH | |
641 | if (globp == 0) | |
642 | globp = ""; | |
643 | else if (peekc) | |
644 | --globp; | |
887e3e0d MH |
645 | if (*globp == ';') { |
646 | /* /foo/;/bar/ */ | |
647 | globp++; | |
648 | dot = addr; | |
649 | cursor = loc1; | |
650 | goto fromsemi; | |
651 | } | |
652 | dot = odot; | |
e4283c49 MH |
653 | ungetchar(d); |
654 | c = 0; | |
655 | if (*globp == 'z') | |
656 | globp++, c = '\n'; | |
657 | if (any(*globp, "^+-.")) | |
658 | c = *globp++; | |
659 | i = 0; | |
660 | while (isdigit(*globp)) | |
661 | i = i * 10 + *globp++ - '0'; | |
887e3e0d | 662 | if (any(*globp, "^+-.")) |
e4283c49 | 663 | c = *globp++; |
887e3e0d MH |
664 | if (*globp) { |
665 | /* random junk after the pattern */ | |
666 | beep(); | |
667 | goto slerr; | |
668 | } | |
e4283c49 MH |
669 | globp = oglobp; |
670 | splitw = 0; | |
671 | vmoving = 0; | |
672 | wcursor = loc1; | |
673 | if (i != 0) | |
674 | vsetsiz(i); | |
675 | if (opf == vmove) { | |
676 | if (state == ONEOPEN || state == HARDOPEN) | |
677 | outline = destline = WBOT; | |
678 | if (addr != dot || loc1 != cursor) | |
679 | markDOT(); | |
680 | if (loc1 > linebuf && *loc1 == 0) | |
681 | loc1--; | |
682 | if (c) | |
683 | vjumpto(addr, loc1, c); | |
684 | else { | |
685 | vmoving = 0; | |
686 | if (loc1) { | |
687 | vmoving++; | |
688 | vmovcol = column(loc1); | |
689 | } | |
690 | getDOT(); | |
691 | if (state == CRTOPEN && addr != dot) | |
692 | vup1(); | |
693 | vupdown(addr - dot, NOSTR); | |
694 | } | |
695 | return; | |
696 | } | |
697 | lastcp[-1] = 'n'; | |
698 | getDOT(); | |
699 | wdot = addr; | |
700 | break; | |
701 | } | |
702 | /* | |
703 | * Apply. | |
704 | */ | |
705 | if (vreg && wdot == 0) | |
706 | wdot = dot; | |
707 | (*opf)(c); | |
708 | wdot = NOLINE; | |
709 | } | |
710 | ||
711 | /* | |
712 | * Find single character c, in direction dir from cursor. | |
713 | */ | |
714 | find(c) | |
715 | char c; | |
716 | { | |
717 | ||
718 | for(;;) { | |
719 | if (edge()) | |
720 | return (0); | |
721 | wcursor += dir; | |
722 | if (*wcursor == c) | |
723 | return (1); | |
724 | } | |
725 | } | |
726 | ||
727 | /* | |
728 | * Do a word motion with operator op, and cnt more words | |
729 | * to go after this. | |
730 | */ | |
731 | word(op, cnt) | |
732 | register int (*op)(); | |
733 | int cnt; | |
734 | { | |
735 | register int which; | |
736 | register char *iwc; | |
737 | register line *iwdot = wdot; | |
738 | ||
739 | if (dir == 1) { | |
740 | iwc = wcursor; | |
741 | which = wordch(wcursor); | |
742 | while (wordof(which, wcursor)) { | |
743 | if (cnt == 1 && op != vmove && wcursor[1] == 0) { | |
744 | wcursor++; | |
745 | break; | |
746 | } | |
747 | if (!lnext()) | |
748 | return (0); | |
749 | if (wcursor == linebuf) | |
750 | break; | |
751 | } | |
752 | /* Unless last segment of a change skip blanks */ | |
753 | if (op != vchange || cnt > 1) | |
754 | while (!margin() && blank()) | |
755 | wcursor++; | |
756 | else | |
757 | if (wcursor == iwc && iwdot == wdot && *iwc) | |
758 | wcursor++; | |
759 | if (op == vmove && margin()) | |
760 | wcursor--; | |
761 | } else { | |
762 | if (!lnext()) | |
763 | return (0); | |
764 | while (blank()) | |
765 | if (!lnext()) | |
766 | return (0); | |
767 | if (!margin()) { | |
768 | which = wordch(wcursor); | |
769 | while (!margin() && wordof(which, wcursor)) | |
770 | wcursor--; | |
771 | } | |
772 | if (wcursor < linebuf || !wordof(which, wcursor)) | |
773 | wcursor++; | |
774 | } | |
775 | return (1); | |
776 | } | |
777 | ||
778 | /* | |
779 | * To end of word, with operator op and cnt more motions | |
780 | * remaining after this. | |
781 | */ | |
782 | eend(op) | |
783 | register int (*op)(); | |
784 | { | |
785 | register int which; | |
786 | ||
787 | if (!lnext()) | |
788 | return; | |
789 | while (blank()) | |
790 | if (!lnext()) | |
791 | return; | |
792 | which = wordch(wcursor); | |
793 | while (wordof(which, wcursor)) { | |
794 | if (wcursor[1] == 0) { | |
795 | wcursor++; | |
796 | break; | |
797 | } | |
798 | if (!lnext()) | |
799 | return; | |
800 | } | |
801 | if (op != vchange && op != vdelete && wcursor > linebuf) | |
802 | wcursor--; | |
803 | } | |
804 | ||
805 | /* | |
806 | * Wordof tells whether the character at *wc is in a word of | |
807 | * kind which (blank/nonblank words are 0, conservative words 1). | |
808 | */ | |
809 | wordof(which, wc) | |
810 | char which; | |
811 | register char *wc; | |
812 | { | |
813 | ||
814 | if (isspace(*wc)) | |
815 | return (0); | |
816 | return (!wdkind || wordch(wc) == which); | |
817 | } | |
818 | ||
819 | /* | |
820 | * Wordch tells whether character at *wc is a word character | |
821 | * i.e. an alfa, digit, or underscore. | |
822 | */ | |
823 | wordch(wc) | |
824 | char *wc; | |
825 | { | |
826 | register int c; | |
827 | ||
828 | c = wc[0]; | |
829 | return (isalpha(c) || isdigit(c) || c == '_'); | |
830 | } | |
831 | ||
832 | /* | |
833 | * Edge tells when we hit the last character in the current line. | |
834 | */ | |
835 | edge() | |
836 | { | |
837 | ||
838 | if (linebuf[0] == 0) | |
839 | return (1); | |
840 | if (dir == 1) | |
841 | return (wcursor[1] == 0); | |
842 | else | |
843 | return (wcursor == linebuf); | |
844 | } | |
845 | ||
846 | /* | |
847 | * Margin tells us when we have fallen off the end of the line. | |
848 | */ | |
849 | margin() | |
850 | { | |
851 | ||
852 | return (wcursor < linebuf || wcursor[0] == 0); | |
853 | } |