Commit | Line | Data |
---|---|---|
27704fe4 BJ |
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 | /* | |
7 | * Low level routines for operations sequences, | |
8 | * and mostly, insert mode (and a subroutine | |
9 | * to read an input line, including in the echo area.) | |
10 | */ | |
11 | char *vUA1, *vUA2; | |
12 | char *vUD1, *vUD2; | |
13 | ||
14 | /* | |
15 | * Obleeperate characters in hardcopy | |
16 | * open with \'s. | |
17 | */ | |
18 | bleep(i, cp) | |
19 | register int i; | |
20 | char *cp; | |
21 | { | |
22 | ||
23 | i -= column(cp); | |
24 | do | |
25 | putchar('\\' | QUOTE); | |
26 | while (--i >= 0); | |
27 | rubble = 1; | |
28 | } | |
29 | ||
30 | /* | |
31 | * Common code for middle part of delete | |
32 | * and change operating on parts of lines. | |
33 | */ | |
34 | vdcMID() | |
35 | { | |
36 | register char *cp; | |
37 | ||
38 | squish(); | |
39 | setLAST(); | |
40 | vundkind = VCHNG, CP(vutmp, linebuf); | |
41 | if (wcursor < cursor) | |
42 | cp = wcursor, wcursor = cursor, cursor = cp; | |
43 | vUD1 = vUA1 = vUA2 = cursor; vUD2 = wcursor; | |
44 | return (column(wcursor - 1)); | |
45 | } | |
46 | ||
47 | /* | |
48 | * Take text from linebuf and stick it | |
49 | * in the VBSIZE buffer BUF. Used to save | |
50 | * deleted text of part of line. | |
51 | */ | |
52 | takeout(BUF) | |
53 | char *BUF; | |
54 | { | |
55 | register char *cp; | |
56 | ||
57 | if (wcursor < linebuf) | |
58 | wcursor = linebuf; | |
59 | if (cursor == wcursor) { | |
60 | beep(); | |
61 | return; | |
62 | } | |
63 | if (wcursor < cursor) { | |
64 | cp = wcursor; | |
65 | wcursor = cursor; | |
66 | cursor = cp; | |
67 | } | |
68 | setBUF(BUF); | |
69 | if ((BUF[0] & (QUOTE|TRIM)) == OVERBUF) | |
70 | beep(); | |
71 | } | |
72 | ||
73 | /* | |
74 | * Are we at the end of the printed representation of the | |
75 | * line? Used internally in hardcopy open. | |
76 | */ | |
77 | ateopr() | |
78 | { | |
79 | register int i, c; | |
80 | register char *cp = vtube[destline] + destcol; | |
81 | ||
82 | for (i = WCOLS - destcol; i > 0; i--) { | |
83 | c = *cp++; | |
84 | if (c == 0) | |
85 | return (1); | |
86 | if (c != ' ' && (c & QUOTE) == 0) | |
87 | return (0); | |
88 | } | |
89 | return (1); | |
90 | } | |
91 | ||
92 | /* | |
93 | * Append. | |
94 | * | |
95 | * This routine handles the top level append, doing work | |
96 | * as each new line comes in, and arranging repeatability. | |
97 | * It also handles append with repeat counts, and calculation | |
98 | * of autoindents for new lines. | |
99 | */ | |
100 | bool vaifirst; | |
101 | bool gobbled; | |
102 | char *ogcursor; | |
103 | ||
104 | vappend(ch, cnt, indent) | |
105 | char ch; | |
106 | int cnt, indent; | |
107 | { | |
108 | register int i; | |
109 | register char *gcursor; | |
110 | bool escape; | |
111 | int repcnt; | |
112 | short oldhold = hold; | |
113 | ||
114 | /* | |
115 | * Before a move in hardopen when the line is dirty | |
116 | * or we are in the middle of the printed representation, | |
117 | * we retype the line to the left of the cursor so the | |
118 | * insert looks clean. | |
119 | */ | |
120 | if (ch != 'o' && state == HARDOPEN && (rubble || !ateopr())) { | |
121 | rubble = 1; | |
122 | gcursor = cursor; | |
123 | i = *gcursor; | |
124 | *gcursor = ' '; | |
125 | wcursor = gcursor; | |
126 | vmove(); | |
127 | *gcursor = i; | |
128 | } | |
129 | vaifirst = indent == 0; | |
130 | ||
131 | /* | |
132 | * Handle replace character by (eventually) | |
133 | * limiting the number of input characters allowed | |
134 | * in the vgetline routine. | |
135 | */ | |
136 | if (ch == 'r') | |
137 | repcnt = 2; | |
138 | else | |
139 | repcnt = 0; | |
140 | ||
141 | /* | |
142 | * If an autoindent is specified, then | |
143 | * generate a mixture of blanks to tabs to implement | |
144 | * it and place the cursor after the indent. | |
145 | * Text read by the vgetline routine will be placed in genbuf, | |
146 | * so the indent is generated there. | |
147 | */ | |
148 | if (value(AUTOINDENT) && indent != 0) { | |
149 | gcursor = genindent(indent); | |
150 | *gcursor = 0; | |
151 | vgotoCL(qcolumn(cursor - 1, genbuf)); | |
152 | } else { | |
153 | gcursor = genbuf; | |
154 | *gcursor = 0; | |
155 | if (ch == 'o') | |
156 | vfixcurs(); | |
157 | } | |
158 | ||
159 | /* | |
160 | * Prepare for undo. Pointers delimit inserted portion of line. | |
161 | */ | |
162 | vUA1 = vUA2 = cursor; | |
163 | ||
164 | /* | |
165 | * If we are not in a repeated command and a ^@ comes in | |
166 | * then this means the previous inserted text. | |
167 | * If there is none or it was too long to be saved, | |
168 | * then beep() and also arrange to undo any damage done | |
169 | * so far (e.g. if we are a change.) | |
170 | */ | |
171 | if ((vglobp && *vglobp == 0) || peekbr()) { | |
172 | if ((INS[0] & (QUOTE|TRIM)) == OVERBUF) { | |
173 | beep(); | |
174 | if (!splitw) | |
175 | ungetkey('u'); | |
176 | doomed = 0; | |
177 | hold = oldhold; | |
178 | return; | |
179 | } | |
180 | /* | |
181 | * Unread input from INS. | |
182 | * An escape will be generated at end of string. | |
183 | * Hold off n^^2 type update on dumb terminals. | |
184 | */ | |
185 | vglobp = INS; | |
186 | hold |= HOLDQIK; | |
187 | } else if (vglobp == 0) | |
188 | /* | |
189 | * Not a repeated command, get | |
190 | * a new inserted text for repeat. | |
191 | */ | |
192 | INS[0] = 0; | |
193 | ||
194 | /* | |
195 | * For wrapmargin to hack away second space after a '.' | |
196 | * when the first space caused a line break we keep | |
197 | * track that this happened in gobblebl, which says | |
198 | * to gobble up a blank silently. | |
199 | */ | |
200 | gobblebl = 0; | |
201 | ||
202 | /* | |
203 | * Text gathering loop. | |
204 | * New text goes into genbuf starting at gcursor. | |
205 | * cursor preserves place in linebuf where text will eventually go. | |
206 | */ | |
207 | if (*cursor == 0 || state == CRTOPEN) | |
208 | hold |= HOLDROL; | |
209 | for (;;) { | |
210 | if (ch == 'r' && repcnt == 0) | |
211 | escape = 0; | |
212 | else { | |
213 | gcursor = vgetline(repcnt, gcursor, &escape); | |
214 | ||
215 | /* | |
216 | * After an append, stick information | |
217 | * about the ^D's and ^^D's and 0^D's in | |
218 | * the repeated text buffer so repeated | |
219 | * inserts of stuff indented with ^D as backtab's | |
220 | * can work. | |
221 | */ | |
222 | if (HADUP) | |
223 | addtext("^"); | |
224 | else if (HADZERO) | |
225 | addtext("0"); | |
226 | while (CDCNT > 0) | |
227 | addtext("\204"), CDCNT--; | |
228 | if (gobbled) | |
229 | addtext(" "); | |
230 | addtext(ogcursor); | |
231 | } | |
232 | repcnt = 0; | |
233 | ||
234 | /* | |
235 | * Smash the generated and preexisting indents together | |
236 | * and generate one cleanly made out of tabs and spaces | |
237 | * if we are using autoindent. | |
238 | */ | |
239 | if (!vaifirst && value(AUTOINDENT)) { | |
240 | i = fixindent(indent); | |
241 | if (!HADUP) | |
242 | indent = i; | |
243 | gcursor = strend(genbuf); | |
244 | } | |
245 | ||
246 | /* | |
247 | * Limit the repetition count based on maximum | |
248 | * possible line length; do output implied | |
249 | * by further count (> 1) and cons up the new line | |
250 | * in linebuf. | |
251 | */ | |
252 | cnt = vmaxrep(ch, cnt); | |
253 | CP(gcursor + 1, cursor); | |
254 | do { | |
255 | CP(cursor, genbuf); | |
256 | if (cnt > 1) { | |
257 | int oldhold = hold; | |
258 | ||
259 | Outchar = vinschar; | |
260 | hold |= HOLDQIK; | |
261 | printf("%s", genbuf); | |
262 | hold = oldhold; | |
263 | Outchar = vputchar; | |
264 | } | |
265 | cursor += gcursor - genbuf; | |
266 | } while (--cnt > 0); | |
267 | endim(); | |
268 | vUA2 = cursor; | |
269 | if (escape != '\n') | |
270 | CP(cursor, gcursor + 1); | |
271 | ||
272 | /* | |
273 | * If doomed characters remain, clobber them, | |
274 | * and reopen the line to get the display exact. | |
275 | */ | |
276 | if (state != HARDOPEN) { | |
277 | DEPTH(vcline) = 0; | |
278 | if (doomed > 0) { | |
279 | register int cind = cindent(); | |
280 | ||
281 | physdc(cind, cind + doomed); | |
282 | doomed = 0; | |
283 | } | |
284 | i = vreopen(LINE(vcline), lineDOT(), vcline); | |
285 | } | |
286 | ||
287 | /* | |
288 | * All done unless we are continuing on to another line. | |
289 | */ | |
290 | if (escape != '\n') | |
291 | break; | |
292 | ||
293 | /* | |
294 | * Set up for the new line. | |
295 | * First save the current line, then construct a new | |
296 | * first image for the continuation line consisting | |
297 | * of any new autoindent plus the pushed ahead text. | |
298 | */ | |
299 | killU(); | |
300 | addtext(gobblebl ? " " : "\n"); | |
301 | vsave(); | |
302 | cnt = 1; | |
303 | if (value(AUTOINDENT)) { | |
304 | #ifdef LISPCODE | |
305 | if (value(LISP)) | |
306 | indent = lindent(dot + 1); | |
307 | else | |
308 | #endif | |
309 | if (!HADUP && vaifirst) | |
310 | indent = whitecnt(linebuf); | |
311 | vaifirst = 0; | |
312 | strcLIN(vpastwh(gcursor + 1)); | |
313 | gcursor = genindent(indent); | |
314 | *gcursor = 0; | |
315 | if (gcursor + strlen(linebuf) > &genbuf[LBSIZE - 2]) | |
316 | gcursor = genbuf; | |
317 | CP(gcursor, linebuf); | |
318 | } else { | |
319 | CP(genbuf, gcursor + 1); | |
320 | gcursor = genbuf; | |
321 | } | |
322 | ||
323 | /* | |
324 | * If we started out as a single line operation and are now | |
325 | * turning into a multi-line change, then we had better yank | |
326 | * out dot before it changes so that undo will work | |
327 | * correctly later. | |
328 | */ | |
329 | if (vundkind == VCHNG) { | |
330 | vremote(1, yank, 0); | |
331 | undap1--; | |
332 | } | |
333 | ||
334 | /* | |
335 | * Now do the append of the new line in the buffer, | |
336 | * and update the display. If slowopen | |
337 | * we don't do very much. | |
338 | */ | |
339 | vdoappend(genbuf); | |
340 | vundkind = VMANYINS; | |
341 | vcline++; | |
342 | if (state != VISUAL) | |
343 | vshow(dot, NOLINE); | |
344 | else { | |
345 | i += LINE(vcline - 1); | |
346 | vopen(dot, i); | |
347 | if (value(SLOWOPEN)) | |
348 | vscrap(); | |
349 | else | |
350 | vsync1(LINE(vcline)); | |
351 | } | |
352 | strcLIN(gcursor); | |
353 | *gcursor = 0; | |
354 | cursor = linebuf; | |
355 | vgotoCL(qcolumn(cursor - 1, genbuf)); | |
356 | } | |
357 | ||
358 | /* | |
359 | * All done with insertion, position the cursor | |
360 | * and sync the screen. | |
361 | */ | |
362 | hold = oldhold; | |
363 | if (cursor > linebuf) | |
364 | cursor--; | |
365 | if (state != HARDOPEN) | |
366 | vsyncCL(); | |
367 | else if (cursor > linebuf) | |
368 | back1(); | |
369 | doomed = 0; | |
370 | wcursor = cursor; | |
371 | vmove(); | |
372 | } | |
373 | ||
374 | /* | |
375 | * Subroutine for vgetline to back up a single character position, | |
376 | * backwards around end of lines (vgoto can't hack columns which are | |
377 | * less than 0 in general). | |
378 | */ | |
379 | back1() | |
380 | { | |
381 | ||
382 | vgoto(destline - 1, WCOLS + destcol - 1); | |
383 | } | |
384 | ||
385 | /* | |
386 | * Get a line into genbuf after gcursor. | |
387 | * Cnt limits the number of input characters | |
388 | * accepted and is used for handling the replace | |
389 | * single character command. Aescaped is the location | |
390 | * where we stick a termination indicator (whether we | |
391 | * ended with an ESCAPE or a newline/return. | |
392 | * | |
393 | * We do erase-kill type processing here and also | |
394 | * are careful about the way we do this so that it is | |
395 | * repeatable. (I.e. so that your kill doesn't happen, | |
396 | * when you repeat an insert if it was escaped with \ the | |
397 | * first time you did it. | |
398 | */ | |
399 | char * | |
400 | vgetline(cnt, gcursor, aescaped) | |
401 | int cnt; | |
402 | register char *gcursor; | |
403 | bool *aescaped; | |
404 | { | |
405 | register int c, ch; | |
406 | register char *cp; | |
407 | int x, y, iwhite; | |
408 | char *iglobp; | |
409 | int (*OO)() = Outchar; | |
410 | ||
411 | /* | |
412 | * Clear the output state and counters | |
413 | * for autoindent backwards motion (counts of ^D, etc.) | |
414 | * Remember how much white space at beginning of line so | |
415 | * as not to allow backspace over autoindent. | |
416 | */ | |
417 | *aescaped = 0; | |
418 | ogcursor = gcursor; | |
419 | flusho(); | |
420 | CDCNT = 0; | |
421 | HADUP = 0; | |
422 | HADZERO = 0; | |
423 | gobbled = 0; | |
424 | iwhite = whitecnt(genbuf); | |
425 | iglobp = vglobp; | |
426 | ||
427 | /* | |
428 | * Carefully avoid using vinschar in the echo area. | |
429 | */ | |
430 | if (splitw) | |
431 | Outchar = vputchar; | |
432 | else { | |
433 | Outchar = vinschar; | |
434 | vprepins(); | |
435 | } | |
436 | for (;;) { | |
437 | if (gobblebl) | |
438 | gobblebl--; | |
439 | if (cnt != 0) { | |
440 | cnt--; | |
441 | if (cnt == 0) | |
442 | goto vadone; | |
443 | } | |
444 | ch = c = getkey() & (QUOTE|TRIM); | |
445 | if (value(MAPINPUT)) | |
446 | while ((ch = map(c, arrows)) != c) | |
447 | c = ch; | |
448 | if (!iglobp) { | |
449 | ||
450 | /* | |
451 | * Erase-kill type processing. | |
452 | * Only happens if we were not reading | |
453 | * from untyped input when we started. | |
454 | * Map users erase to ^H, kill to -1 for switch. | |
455 | */ | |
456 | if (c == tty.sg_erase) | |
457 | c = CTRL(h); | |
458 | else if (c == tty.sg_kill) | |
459 | c = -1; | |
460 | switch (c) { | |
461 | ||
462 | /* | |
463 | * ^? Interrupt drops you back to visual | |
464 | * command mode with an unread interrupt | |
465 | * still in the input buffer. | |
466 | * | |
467 | * ^\ Quit does the same as interrupt. | |
468 | * If you are a ex command rather than | |
469 | * a vi command this will drop you | |
470 | * back to command mode for sure. | |
471 | */ | |
472 | case ATTN: | |
473 | case QUIT: | |
474 | ungetkey(c); | |
475 | goto vadone; | |
476 | ||
477 | /* | |
478 | * ^H Backs up a character in the input. | |
479 | * | |
480 | * BUG: Can't back around line boundaries. | |
481 | * This is hard because stuff has | |
482 | * already been saved for repeat. | |
483 | */ | |
484 | case CTRL(h): | |
485 | bakchar: | |
486 | cp = gcursor - 1; | |
487 | if (cp < ogcursor) { | |
488 | if (splitw) { | |
489 | /* | |
490 | * Backspacing over readecho | |
491 | * prompt. Pretend delete but | |
492 | * don't beep. | |
493 | */ | |
494 | ungetkey(c); | |
495 | goto vadone; | |
496 | } | |
497 | beep(); | |
498 | continue; | |
499 | } | |
500 | goto vbackup; | |
501 | ||
502 | /* | |
503 | * ^W Back up a white/non-white word. | |
504 | */ | |
505 | case CTRL(w): | |
506 | wdkind = 1; | |
507 | for (cp = gcursor; cp > ogcursor && isspace(cp[-1]); cp--) | |
508 | continue; | |
509 | for (c = wordch(cp - 1); | |
510 | cp > ogcursor && wordof(c, cp - 1); cp--) | |
511 | continue; | |
512 | goto vbackup; | |
513 | ||
514 | /* | |
515 | * users kill Kill input on this line, back to | |
516 | * the autoindent. | |
517 | */ | |
518 | case -1: | |
519 | cp = ogcursor; | |
520 | vbackup: | |
521 | if (cp == gcursor) { | |
522 | beep(); | |
523 | continue; | |
524 | } | |
525 | endim(); | |
526 | *cp = 0; | |
527 | c = cindent(); | |
528 | vgotoCL(qcolumn(cursor - 1, genbuf)); | |
529 | if (doomed >= 0) | |
530 | doomed += c - cindent(); | |
531 | gcursor = cp; | |
532 | continue; | |
533 | ||
534 | /* | |
535 | * \ Followed by erase or kill | |
536 | * maps to just the erase or kill. | |
537 | */ | |
538 | case '\\': | |
539 | x = destcol, y = destline; | |
540 | putchar('\\'); | |
541 | vcsync(); | |
542 | c = getkey(); | |
543 | if (c == tty.sg_erase || c == tty.sg_kill) { | |
544 | vgoto(y, x); | |
545 | if (doomed >= 0) | |
546 | doomed++; | |
547 | goto def; | |
548 | } | |
549 | ungetkey(c), c = '\\'; | |
550 | goto noput; | |
551 | ||
552 | /* | |
553 | * ^Q Super quote following character | |
554 | * Only ^@ is verboten (trapped at | |
555 | * a lower level) and \n forces a line | |
556 | * split so doesn't really go in. | |
557 | * | |
558 | * ^V Synonym for ^Q | |
559 | */ | |
560 | case CTRL(q): | |
561 | case CTRL(v): | |
562 | x = destcol, y = destline; | |
563 | putchar('^'); | |
564 | vgoto(y, x); | |
565 | c = getkey(); | |
566 | #ifdef TIOCSETC | |
567 | if (c == ATTN) | |
568 | c = nttyc.t_intrc; | |
569 | #endif | |
570 | if (c != NL) { | |
571 | if (doomed >= 0) | |
572 | doomed++; | |
573 | goto def; | |
574 | } | |
575 | break; | |
576 | } | |
577 | } | |
578 | ||
579 | /* | |
580 | * If we get a blank not in the echo area | |
581 | * consider splitting the window in the wrapmargin. | |
582 | */ | |
583 | if (c == ' ' && !splitw) { | |
584 | if (gobblebl) { | |
585 | gobbled = 1; | |
586 | continue; | |
587 | } | |
588 | if (value(WRAPMARGIN) && outcol >= OCOLUMNS - value(WRAPMARGIN)) { | |
589 | c = NL; | |
590 | gobblebl = 2; | |
591 | } | |
592 | } | |
593 | switch (c) { | |
594 | ||
595 | /* | |
596 | * ^M Except in repeat maps to \n. | |
597 | */ | |
598 | case CR: | |
599 | if (vglobp) | |
600 | goto def; | |
601 | c = '\n'; | |
602 | /* presto chango ... */ | |
603 | ||
604 | /* | |
605 | * \n Start new line. | |
606 | */ | |
607 | case NL: | |
608 | *aescaped = c; | |
609 | goto vadone; | |
610 | ||
611 | /* | |
612 | * escape End insert unless repeat and more to repeat. | |
613 | */ | |
614 | case ESCAPE: | |
615 | if (lastvgk) | |
616 | goto def; | |
617 | goto vadone; | |
618 | ||
619 | /* | |
620 | * ^D Backtab. | |
621 | * ^T Software forward tab. | |
622 | * | |
623 | * Unless in repeat where this means these | |
624 | * were superquoted in. | |
625 | */ | |
626 | case CTRL(d): | |
627 | case CTRL(t): | |
628 | if (vglobp) | |
629 | goto def; | |
630 | /* fall into ... */ | |
631 | ||
632 | /* | |
633 | * ^D|QUOTE Is a backtab (in a repeated command). | |
634 | */ | |
635 | case CTRL(d) | QUOTE: | |
636 | *gcursor = 0; | |
637 | cp = vpastwh(genbuf); | |
638 | c = whitecnt(genbuf); | |
639 | if (ch == CTRL(t)) { | |
640 | /* | |
641 | * ^t just generates new indent replacing | |
642 | * current white space rounded up to soft | |
643 | * tab stop increment. | |
644 | */ | |
645 | if (cp != gcursor) | |
646 | /* | |
647 | * BUG: Don't hack ^T except | |
648 | * right after initial | |
649 | * white space. | |
650 | */ | |
651 | continue; | |
652 | cp = genindent(iwhite = backtab(c + value(SHIFTWIDTH) + 1)); | |
653 | ogcursor = cp; | |
654 | goto vbackup; | |
655 | } | |
656 | /* | |
657 | * ^D works only if we are at the (end of) the | |
658 | * generated autoindent. We count the ^D for repeat | |
659 | * purposes. | |
660 | */ | |
661 | if (c == iwhite && c != 0) | |
662 | if (cp == gcursor) { | |
663 | iwhite = backtab(c); | |
664 | CDCNT++; | |
665 | ogcursor = cp = genindent(iwhite); | |
666 | goto vbackup; | |
667 | } else if (&cp[1] == gcursor && | |
668 | (*cp == '^' || *cp == '0')) { | |
669 | /* | |
670 | * ^^D moves to margin, then back | |
671 | * to current indent on next line. | |
672 | * | |
673 | * 0^D moves to margin and then | |
674 | * stays there. | |
675 | */ | |
676 | HADZERO = *cp == '0'; | |
677 | ogcursor = cp = genbuf; | |
678 | HADUP = 1 - HADZERO; | |
679 | CDCNT = 1; | |
680 | endim(); | |
681 | back1(); | |
682 | vputc(' '); | |
683 | goto vbackup; | |
684 | } | |
685 | if (vglobp && vglobp - iglobp >= 2 && | |
686 | (vglobp[-2] == '^' || vglobp[-2] == '0') | |
687 | && gcursor == ogcursor + 1) | |
688 | goto bakchar; | |
689 | continue; | |
690 | ||
691 | default: | |
692 | /* | |
693 | * Possibly discard control inputs. | |
694 | */ | |
695 | if (!vglobp && junk(c)) { | |
696 | beep(); | |
697 | continue; | |
698 | } | |
699 | def: | |
700 | putchar(c); | |
701 | noput: | |
702 | if (gcursor > &genbuf[LBSIZE - 2]) | |
703 | error("Line too long"); | |
704 | *gcursor++ = c & TRIM; | |
705 | vcsync(); | |
706 | #ifdef LISPCODE | |
707 | if (value(SHOWMATCH) && !iglobp) | |
708 | if (c == ')' || c == '}') | |
709 | lsmatch(gcursor); | |
710 | #endif | |
711 | continue; | |
712 | } | |
713 | } | |
714 | vadone: | |
715 | *gcursor = 0; | |
716 | Outchar = OO; | |
717 | endim(); | |
718 | return (gcursor); | |
719 | } | |
720 | ||
721 | int vgetsplit(); | |
722 | char *vsplitpt; | |
723 | ||
724 | /* | |
725 | * Append the line in buffer at lp | |
726 | * to the buffer after dot. | |
727 | */ | |
728 | vdoappend(lp) | |
729 | char *lp; | |
730 | { | |
731 | register int oing = inglobal; | |
732 | ||
733 | vsplitpt = lp; | |
734 | inglobal = 1; | |
735 | ignore(append(vgetsplit, dot)); | |
736 | inglobal = oing; | |
737 | } | |
738 | ||
739 | /* | |
740 | * Subroutine for vdoappend to pass to append. | |
741 | */ | |
742 | vgetsplit() | |
743 | { | |
744 | ||
745 | if (vsplitpt == 0) | |
746 | return (EOF); | |
747 | strcLIN(vsplitpt); | |
748 | vsplitpt = 0; | |
749 | return (0); | |
750 | } | |
751 | ||
752 | /* | |
753 | * Vmaxrep determines the maximum repetitition factor | |
754 | * allowed that will yield total line length less than | |
755 | * LBSIZE characters and also does hacks for the R command. | |
756 | */ | |
757 | vmaxrep(ch, cnt) | |
758 | char ch; | |
759 | register int cnt; | |
760 | { | |
761 | register int len, replen; | |
762 | ||
763 | if (cnt > LBSIZE - 2) | |
764 | cnt = LBSIZE - 2; | |
765 | replen = strlen(genbuf); | |
766 | if (ch == 'R') { | |
767 | len = strlen(cursor); | |
768 | if (replen < len) | |
769 | len = replen; | |
770 | CP(cursor, cursor + len); | |
771 | vUD2 += len; | |
772 | } | |
773 | len = strlen(linebuf); | |
774 | if (len + cnt * replen <= LBSIZE - 2) | |
775 | return (cnt); | |
776 | cnt = (LBSIZE - 2 - len) / replen; | |
777 | if (cnt == 0) { | |
778 | vsave(); | |
779 | error("Line too long"); | |
780 | } | |
781 | return (cnt); | |
782 | } |