Commit | Line | Data |
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3afdd8d7 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 | wcursor = cursor; | |
123 | vmove(); | |
124 | } | |
125 | vaifirst = indent == 0; | |
126 | ||
127 | /* | |
128 | * Handle replace character by (eventually) | |
129 | * limiting the number of input characters allowed | |
130 | * in the vgetline routine. | |
131 | */ | |
132 | if (ch == 'r') | |
133 | repcnt = 2; | |
134 | else | |
135 | repcnt = 0; | |
136 | ||
137 | /* | |
138 | * If an autoindent is specified, then | |
139 | * generate a mixture of blanks to tabs to implement | |
140 | * it and place the cursor after the indent. | |
141 | * Text read by the vgetline routine will be placed in genbuf, | |
142 | * so the indent is generated there. | |
143 | */ | |
144 | if (value(AUTOINDENT) && indent != 0) { | |
145 | gcursor = genindent(indent); | |
146 | *gcursor = 0; | |
147 | vgotoCL(qcolumn(cursor - 1, genbuf)); | |
148 | } else { | |
149 | gcursor = genbuf; | |
150 | *gcursor = 0; | |
151 | if (ch == 'o') | |
152 | vfixcurs(); | |
153 | } | |
154 | ||
155 | /* | |
156 | * Prepare for undo. Pointers delimit inserted portion of line. | |
157 | */ | |
158 | vUA1 = vUA2 = cursor; | |
159 | ||
160 | /* | |
161 | * If we are not in a repeated command and a ^@ comes in | |
162 | * then this means the previous inserted text. | |
163 | * If there is none or it was too long to be saved, | |
164 | * then beep() and also arrange to undo any damage done | |
165 | * so far (e.g. if we are a change.) | |
166 | */ | |
167 | if ((vglobp && *vglobp == 0) || peekbr()) { | |
168 | if ((INS[0] & (QUOTE|TRIM)) == OVERBUF) { | |
169 | beep(); | |
170 | if (!splitw) | |
171 | ungetkey('u'); | |
172 | doomed = 0; | |
173 | hold = oldhold; | |
174 | return; | |
175 | } | |
176 | /* | |
177 | * Unread input from INS. | |
178 | * An escape will be generated at end of string. | |
179 | * Hold off n^^2 type update on dumb terminals. | |
180 | */ | |
181 | vglobp = INS; | |
182 | hold |= HOLDQIK; | |
183 | } else if (vglobp == 0) | |
184 | /* | |
185 | * Not a repeated command, get | |
186 | * a new inserted text for repeat. | |
187 | */ | |
188 | INS[0] = 0; | |
189 | ||
190 | /* | |
191 | * For wrapmargin to hack away second space after a '.' | |
192 | * when the first space caused a line break we keep | |
193 | * track that this happened in gobblebl, which says | |
194 | * to gobble up a blank silently. | |
195 | */ | |
196 | gobblebl = 0; | |
197 | ||
198 | /* | |
199 | * Text gathering loop. | |
200 | * New text goes into genbuf starting at gcursor. | |
201 | * cursor preserves place in linebuf where text will eventually go. | |
202 | */ | |
203 | if (*cursor == 0 || state == CRTOPEN) | |
204 | hold |= HOLDROL; | |
205 | for (;;) { | |
206 | if (ch == 'r' && repcnt == 0) | |
207 | escape = 0; | |
208 | else { | |
209 | gcursor = vgetline(repcnt, gcursor, &escape); | |
210 | ||
211 | /* | |
212 | * After an append, stick information | |
213 | * about the ^D's and ^^D's and 0^D's in | |
214 | * the repeated text buffer so repeated | |
215 | * inserts of stuff indented with ^D as backtab's | |
216 | * can work. | |
217 | */ | |
218 | if (HADUP) | |
219 | addtext("^"); | |
220 | else if (HADZERO) | |
221 | addtext("0"); | |
222 | while (CDCNT > 0) | |
223 | addtext("\204"), CDCNT--; | |
224 | if (gobbled) | |
225 | addtext(" "); | |
226 | addtext(ogcursor); | |
227 | } | |
228 | repcnt = 0; | |
229 | ||
230 | /* | |
231 | * Smash the generated and preexisting indents together | |
232 | * and generate one cleanly made out of tabs and spaces | |
233 | * if we are using autoindent. | |
234 | */ | |
235 | if (!vaifirst && value(AUTOINDENT)) { | |
236 | i = fixindent(indent); | |
237 | if (!HADUP) | |
238 | indent = i; | |
239 | gcursor = strend(genbuf); | |
240 | } | |
241 | ||
242 | /* | |
243 | * Limit the repetition count based on maximum | |
244 | * possible line length; do output implied | |
245 | * by further count (> 1) and cons up the new line | |
246 | * in linebuf. | |
247 | */ | |
248 | cnt = vmaxrep(ch, cnt); | |
249 | CP(gcursor + 1, cursor); | |
250 | do { | |
251 | CP(cursor, genbuf); | |
252 | if (cnt > 1) { | |
253 | int oldhold = hold; | |
254 | ||
255 | Outchar = vinschar; | |
256 | hold |= HOLDQIK; | |
257 | printf("%s", genbuf); | |
258 | hold = oldhold; | |
259 | Outchar = vputchar; | |
260 | } | |
261 | cursor += gcursor - genbuf; | |
262 | } while (--cnt > 0); | |
263 | endim(); | |
264 | vUA2 = cursor; | |
265 | if (escape != '\n') | |
266 | CP(cursor, gcursor + 1); | |
267 | ||
268 | /* | |
269 | * If doomed characters remain, clobber them, | |
270 | * and reopen the line to get the display exact. | |
271 | */ | |
272 | if (state != HARDOPEN) { | |
273 | DEPTH(vcline) = 0; | |
274 | if (doomed > 0) { | |
275 | register int cind = cindent(); | |
276 | ||
277 | physdc(cind, cind + doomed); | |
278 | doomed = 0; | |
279 | } | |
280 | i = vreopen(LINE(vcline), lineDOT(), vcline); | |
281 | } | |
282 | ||
283 | /* | |
284 | * All done unless we are continuing on to another line. | |
285 | */ | |
286 | if (escape != '\n') | |
287 | break; | |
288 | ||
289 | /* | |
290 | * Set up for the new line. | |
291 | * First save the current line, then construct a new | |
292 | * first image for the continuation line consisting | |
293 | * of any new autoindent plus the pushed ahead text. | |
294 | */ | |
295 | killU(); | |
296 | addtext(gobblebl ? " " : "\n"); | |
297 | vsave(); | |
298 | cnt = 1; | |
299 | if (value(AUTOINDENT)) { | |
300 | #ifdef LISP | |
301 | if (value(LISP)) | |
302 | indent = lindent(dot + 1); | |
303 | else | |
304 | #endif | |
305 | if (!HADUP && vaifirst) | |
306 | indent = whitecnt(linebuf); | |
307 | vaifirst = 0; | |
308 | strcLIN(vpastwh(gcursor + 1)); | |
309 | gcursor = genindent(indent); | |
310 | *gcursor = 0; | |
311 | if (gcursor + strlen(linebuf) > &genbuf[LBSIZE - 2]) | |
312 | gcursor = genbuf; | |
313 | CP(gcursor, linebuf); | |
314 | } else { | |
315 | CP(genbuf, gcursor + 1); | |
316 | gcursor = genbuf; | |
317 | } | |
318 | ||
319 | /* | |
320 | * If we started out as a single line operation and are now | |
321 | * turning into a multi-line change, then we had better yank | |
322 | * out dot before it changes so that undo will work | |
323 | * correctly later. | |
324 | */ | |
325 | if (vundkind == VCHNG) { | |
326 | vremote(1, yank, 0); | |
327 | undap1--; | |
328 | } | |
329 | ||
330 | /* | |
331 | * Now do the append of the new line in the buffer, | |
332 | * and update the display. If slowopen | |
333 | * we don't do very much. | |
334 | */ | |
335 | vdoappend(genbuf); | |
336 | vundkind = VMANYINS; | |
337 | vcline++; | |
338 | if (state != VISUAL) | |
339 | vshow(dot, NOLINE); | |
340 | else { | |
341 | i += LINE(vcline - 1); | |
342 | vopen(dot, i); | |
343 | if (value(SLOWOPEN)) | |
344 | vscrap(); | |
345 | else | |
346 | vsync1(LINE(vcline)); | |
347 | } | |
348 | strcLIN(gcursor); | |
349 | *gcursor = 0; | |
350 | cursor = linebuf; | |
351 | vgotoCL(qcolumn(cursor - 1, genbuf)); | |
352 | } | |
353 | ||
354 | /* | |
355 | * All done with insertion, position the cursor | |
356 | * and sync the screen. | |
357 | */ | |
358 | hold = oldhold; | |
359 | if (cursor > linebuf) | |
360 | cursor--; | |
361 | if (state != HARDOPEN) | |
362 | vsyncCL(); | |
363 | else if (cursor > linebuf) | |
364 | back1(); | |
365 | doomed = 0; | |
366 | wcursor = cursor; | |
367 | vmove(); | |
368 | } | |
369 | ||
370 | /* | |
371 | * Subroutine for vgetline to back up a single character position, | |
372 | * backwards around end of lines (vgoto can't hack columns which are | |
373 | * less than 0 in general). | |
374 | */ | |
375 | back1() | |
376 | { | |
377 | ||
378 | vgoto(destline - 1, WCOLS + destcol - 1); | |
379 | } | |
380 | ||
381 | /* | |
382 | * Get a line into genbuf after gcursor. | |
383 | * Cnt limits the number of input characters | |
384 | * accepted and is used for handling the replace | |
385 | * single character command. Aescaped is the location | |
386 | * where we stick a termination indicator (whether we | |
387 | * ended with an ESCAPE or a newline/return. | |
388 | * | |
389 | * We do erase-kill type processing here and also | |
390 | * are careful about the way we do this so that it is | |
391 | * repeatable. (I.e. so that your kill doesn't happen, | |
392 | * when you repeat an insert if it was escaped with \ the | |
393 | * first time you did it. | |
394 | */ | |
395 | char * | |
396 | vgetline(cnt, gcursor, aescaped) | |
397 | int cnt; | |
398 | register char *gcursor; | |
399 | bool *aescaped; | |
400 | { | |
401 | register int c, ch; | |
402 | register char *cp; | |
403 | int x, y, iwhite; | |
404 | char *iglobp; | |
405 | int (*OO)() = Outchar; | |
406 | ||
407 | /* | |
408 | * Clear the output state and counters | |
409 | * for autoindent backwards motion (counts of ^D, etc.) | |
410 | * Remember how much white space at beginning of line so | |
411 | * as not to allow backspace over autoindent. | |
412 | */ | |
413 | *aescaped = 0; | |
414 | ogcursor = gcursor; | |
415 | flusho(); | |
416 | CDCNT = 0; | |
417 | HADUP = 0; | |
418 | HADZERO = 0; | |
419 | gobbled = 0; | |
420 | iwhite = whitecnt(genbuf); | |
421 | iglobp = vglobp; | |
422 | ||
423 | /* | |
424 | * Carefully avoid using vinschar in the echo area. | |
425 | */ | |
426 | if (splitw) | |
427 | Outchar = vputchar; | |
428 | else { | |
429 | Outchar = vinschar; | |
430 | vprepins(); | |
431 | } | |
432 | for (;;) { | |
433 | if (gobblebl) | |
434 | gobblebl--; | |
435 | if (cnt != 0) { | |
436 | cnt--; | |
437 | if (cnt == 0) | |
438 | goto vadone; | |
439 | } | |
440 | ch = c = getkey() & (QUOTE|TRIM); | |
441 | if (!iglobp) { | |
442 | ||
443 | /* | |
444 | * Erase-kill type processing. | |
445 | * Only happens if we were not reading | |
446 | * from untyped input when we started. | |
447 | * Map users erase to ^H, kill to -1 for switch. | |
448 | */ | |
449 | if (c == tty.sg_erase) | |
450 | c = CTRL(h); | |
451 | else if (c == tty.sg_kill) | |
452 | c = -1; | |
453 | switch (c) { | |
454 | ||
455 | /* | |
456 | * ^? Interrupt drops you back to visual | |
457 | * command mode with an unread interrupt | |
458 | * still in the input buffer. | |
459 | * | |
460 | * ^\ Quit does the same as interrupt. | |
461 | * If you are a ex command rather than | |
462 | * a vi command this will drop you | |
463 | * back to command mode for sure. | |
464 | */ | |
465 | case ATTN: | |
466 | case QUIT: | |
467 | ungetkey(c); | |
468 | goto vadone; | |
469 | ||
470 | /* | |
471 | * ^H Backs up a character in the input. | |
472 | * | |
473 | * BUG: Can't back around line boundaries. | |
474 | * This is hard because stuff has | |
475 | * already been saved for repeat. | |
476 | */ | |
477 | case CTRL(h): | |
478 | bakchar: | |
479 | cp = gcursor - 1; | |
480 | if (cp < ogcursor) { | |
481 | beep(); | |
482 | continue; | |
483 | } | |
484 | goto vbackup; | |
485 | ||
486 | /* | |
487 | * ^W Back up a white/non-white word. | |
488 | */ | |
489 | case CTRL(w): | |
490 | wdkind = 1; | |
491 | for (cp = gcursor; cp > ogcursor && isspace(cp[-1]); cp--) | |
492 | continue; | |
493 | for (c = wordch(cp - 1); cp > ogcursor && wordof(c, cp - 1); cp--) | |
494 | continue; | |
495 | goto vbackup; | |
496 | ||
497 | /* | |
498 | * users kill Kill input on this line, back to | |
499 | * the autoindent. | |
500 | */ | |
501 | case -1: | |
502 | cp = ogcursor; | |
503 | vbackup: | |
504 | if (cp == gcursor) { | |
505 | beep(); | |
506 | continue; | |
507 | } | |
508 | endim(); | |
509 | *cp = 0; | |
510 | c = cindent(); | |
511 | vgotoCL(qcolumn(cursor - 1, genbuf)); | |
512 | if (doomed >= 0) | |
513 | doomed += c - cindent(); | |
514 | gcursor = cp; | |
515 | continue; | |
516 | ||
517 | /* | |
518 | * \ Followed by erase or kill | |
519 | * maps to just the erase or kill. | |
520 | */ | |
521 | case '\\': | |
522 | x = destcol, y = destline; | |
523 | putchar('\\'); | |
524 | vcsync(); | |
525 | c = getkey(); | |
526 | if (c == tty.sg_erase || c == tty.sg_kill) { | |
527 | vgoto(y, x); | |
528 | if (doomed >= 0) | |
529 | doomed++; | |
530 | goto def; | |
531 | } | |
532 | ungetkey(c), c = '\\'; | |
533 | goto noput; | |
534 | ||
535 | /* | |
536 | * ^Q Super quote following character | |
537 | * Only ^@ is verboten (trapped at | |
538 | * a lower level) and \n forces a line | |
539 | * split so doesn't really go in. | |
540 | * | |
541 | * ^V Synonym for ^Q | |
542 | */ | |
543 | case CTRL(q): | |
544 | case CTRL(v): | |
545 | x = destcol, y = destline; | |
546 | putchar('^'); | |
547 | vgoto(y, x); | |
548 | c = getkey(); | |
549 | if (c != NL) { | |
550 | if (doomed >= 0) | |
551 | doomed++; | |
552 | goto def; | |
553 | } | |
554 | break; | |
555 | } | |
556 | } | |
557 | ||
558 | /* | |
559 | * If we get a blank not in the echo area | |
560 | * consider splitting the window in the wrapmargin. | |
561 | */ | |
562 | if (c == ' ' && !splitw) { | |
563 | if (gobblebl) { | |
564 | gobbled = 1; | |
565 | continue; | |
566 | } | |
567 | if (value(WRAPMARGIN) && outcol >= WCOLS - value(WRAPMARGIN)) { | |
568 | c = NL; | |
569 | gobblebl = 2; | |
570 | } | |
571 | } | |
572 | switch (c) { | |
573 | ||
574 | /* | |
575 | * ^M Except in repeat maps to \n. | |
576 | */ | |
577 | case CR: | |
578 | if (vglobp) | |
579 | goto def; | |
580 | c = '\n'; | |
581 | /* presto chango ... */ | |
582 | ||
583 | /* | |
584 | * \n Start new line. | |
585 | */ | |
586 | case NL: | |
587 | *aescaped = c; | |
588 | goto vadone; | |
589 | ||
590 | /* | |
591 | * escape End insert unless repeat and more to repeat. | |
592 | */ | |
593 | case ESCAPE: | |
594 | if (vglobp && *vglobp) | |
595 | goto def; | |
596 | goto vadone; | |
597 | ||
598 | /* | |
599 | * ^D Backtab. | |
600 | * ^T Software forward tab. | |
601 | * | |
602 | * Unless in repeat where this means these | |
603 | * were superquoted in. | |
604 | */ | |
605 | case CTRL(d): | |
606 | case CTRL(t): | |
607 | if (vglobp) | |
608 | goto def; | |
609 | /* fall into ... */ | |
610 | ||
611 | /* | |
612 | * ^D|QUOTE Is a backtab (in a repeated command). | |
613 | */ | |
614 | case CTRL(d) | QUOTE: | |
615 | *gcursor = 0; | |
616 | cp = vpastwh(genbuf); | |
617 | c = whitecnt(genbuf); | |
618 | if (ch == CTRL(t)) { | |
619 | /* | |
620 | * ^t just generates new indent replacing | |
621 | * current white space rounded up to soft | |
622 | * tab stop increment. | |
623 | */ | |
624 | if (cp != gcursor) | |
625 | /* | |
626 | * BUG: Don't hack ^T except | |
627 | * right after initial | |
628 | * white space. | |
629 | */ | |
630 | continue; | |
631 | cp = genindent(iwhite = backtab(c + value(SHIFTWIDTH) + 1)); | |
632 | ogcursor = cp; | |
633 | goto vbackup; | |
634 | } | |
635 | /* | |
636 | * ^D works only if we are at the (end of) the | |
637 | * generated autoindent. We count the ^D for repeat | |
638 | * purposes. | |
639 | */ | |
640 | if (c == iwhite && c != 0) | |
641 | if (cp == gcursor) { | |
642 | iwhite = backtab(c); | |
643 | CDCNT++; | |
644 | ogcursor = cp = genindent(iwhite); | |
645 | goto vbackup; | |
646 | } else if (&cp[1] == gcursor && | |
647 | (*cp == '^' || *cp == '0')) { | |
648 | /* | |
649 | * ^^D moves to margin, then back | |
650 | * to current indent on next line. | |
651 | * | |
652 | * 0^D moves to margin and then | |
653 | * stays there. | |
654 | */ | |
655 | HADZERO = *cp == '0'; | |
656 | ogcursor = cp = genbuf; | |
657 | HADUP = 1 - HADZERO; | |
658 | CDCNT = 1; | |
659 | endim(); | |
660 | back1(); | |
661 | vputc(' '); | |
662 | goto vbackup; | |
663 | } | |
664 | if (vglobp && vglobp - iglobp >= 2 && | |
665 | (vglobp[-2] == '^' || vglobp[-2] == '0') | |
666 | && gcursor == ogcursor + 1) | |
667 | goto bakchar; | |
668 | continue; | |
669 | ||
670 | default: | |
671 | /* | |
672 | * Possibly discard control inputs. | |
673 | */ | |
674 | if (!vglobp && junk(c)) { | |
675 | beep(); | |
676 | continue; | |
677 | } | |
678 | def: | |
679 | putchar(c); | |
680 | noput: | |
681 | if (gcursor > &genbuf[LBSIZE - 2]) | |
682 | error("Line too long"); | |
683 | *gcursor++ = c & TRIM; | |
684 | vcsync(); | |
685 | #ifdef LISP | |
686 | if (value(SHOWMATCH) && !iglobp) | |
687 | if (c == ')' || c == '}') | |
688 | lsmatch(gcursor); | |
689 | #endif | |
690 | continue; | |
691 | } | |
692 | } | |
693 | vadone: | |
694 | *gcursor = 0; | |
695 | Outchar = OO; | |
696 | endim(); | |
697 | return (gcursor); | |
698 | } | |
699 | ||
700 | int vgetsplit(); | |
701 | char *vsplitpt; | |
702 | ||
703 | /* | |
704 | * Append the line in buffer at lp | |
705 | * to the buffer after dot. | |
706 | */ | |
707 | vdoappend(lp) | |
708 | char *lp; | |
709 | { | |
710 | register int oing = inglobal; | |
711 | ||
712 | vsplitpt = lp; | |
713 | inglobal = 1; | |
714 | ignore(append(vgetsplit, dot)); | |
715 | inglobal = oing; | |
716 | } | |
717 | ||
718 | /* | |
719 | * Subroutine for vdoappend to pass to append. | |
720 | */ | |
721 | vgetsplit() | |
722 | { | |
723 | ||
724 | if (vsplitpt == 0) | |
725 | return (EOF); | |
726 | strcLIN(vsplitpt); | |
727 | vsplitpt = 0; | |
728 | return (0); | |
729 | } | |
730 | ||
731 | /* | |
732 | * Vmaxrep determines the maximum repetitition factor | |
733 | * allowed that will yield total line length less than | |
734 | * 512 characters and also does hacks for the R command. | |
735 | */ | |
736 | vmaxrep(ch, cnt) | |
737 | char ch; | |
738 | register int cnt; | |
739 | { | |
740 | register int len, replen; | |
741 | ||
742 | if (cnt > LBSIZE - 2) | |
743 | cnt = LBSIZE - 2; | |
744 | replen = strlen(genbuf); | |
745 | if (ch == 'R') { | |
746 | len = strlen(cursor); | |
747 | if (replen < len) | |
748 | len = replen; | |
749 | CP(cursor, cursor + len); | |
750 | vUD2 += len; | |
751 | } | |
752 | len = strlen(linebuf); | |
753 | if (len + cnt * replen <= LBSIZE - 2) | |
754 | return (cnt); | |
755 | cnt = (LBSIZE - 2 - len) / replen; | |
756 | if (cnt == 0) { | |
757 | vsave(); | |
758 | error("Line too long"); | |
759 | } | |
760 | return (cnt); | |
761 | } |