Commit | Line | Data |
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dac571dd 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 | |
70190965 | 8 | static char sccsid[] = "@(#)ex_vget.c 6.8 (Berkeley) %G%"; |
dac571dd DF |
9 | #endif not lint |
10 | ||
e213a660 MH |
11 | #include "ex.h" |
12 | #include "ex_tty.h" | |
13 | #include "ex_vis.h" | |
14 | ||
15 | /* | |
16 | * Input routines for open/visual. | |
17 | * We handle upper case only terminals in visual and reading from the | |
18 | * echo area here as well as notification on large changes | |
19 | * which appears in the echo area. | |
20 | */ | |
21 | ||
22 | /* | |
23 | * Return the key. | |
24 | */ | |
25 | ungetkey(c) | |
299f2784 | 26 | int c; /* mjm: char --> int */ |
e213a660 MH |
27 | { |
28 | ||
29 | if (Peekkey != ATTN) | |
30 | Peekkey = c; | |
31 | } | |
32 | ||
33 | /* | |
34 | * Return a keystroke, but never a ^@. | |
35 | */ | |
36 | getkey() | |
37 | { | |
299f2784 | 38 | register int c; /* mjm: char --> int */ |
e213a660 MH |
39 | |
40 | do { | |
41 | c = getbr(); | |
42 | if (c==0) | |
43 | beep(); | |
44 | } while (c == 0); | |
45 | return (c); | |
46 | } | |
47 | ||
48 | /* | |
49 | * Tell whether next keystroke would be a ^@. | |
50 | */ | |
51 | peekbr() | |
52 | { | |
53 | ||
54 | Peekkey = getbr(); | |
55 | return (Peekkey == 0); | |
56 | } | |
57 | ||
58 | short precbksl; | |
1013c773 | 59 | jmp_buf readbuf; |
47bdd628 | 60 | int doingread = 0; |
e213a660 MH |
61 | |
62 | /* | |
63 | * Get a keystroke, including a ^@. | |
64 | * If an key was returned with ungetkey, that | |
65 | * comes back first. Next comes unread input (e.g. | |
66 | * from repeating commands with .), and finally new | |
67 | * keystrokes. | |
68 | * | |
69 | * The hard work here is in mapping of \ escaped | |
70 | * characters on upper case only terminals. | |
71 | */ | |
72 | getbr() | |
73 | { | |
74 | char ch; | |
75 | register int c, d; | |
76 | register char *colp; | |
299f2784 | 77 | int cnt; |
d266c416 MH |
78 | #define BEEHIVE |
79 | #ifdef BEEHIVE | |
80 | static char Peek2key; | |
81 | #endif | |
82 | extern short slevel, ttyindes; | |
e213a660 MH |
83 | |
84 | getATTN: | |
85 | if (Peekkey) { | |
86 | c = Peekkey; | |
87 | Peekkey = 0; | |
88 | return (c); | |
89 | } | |
d266c416 MH |
90 | #ifdef BEEHIVE |
91 | if (Peek2key) { | |
92 | c = Peek2key; | |
93 | Peek2key = 0; | |
94 | return (c); | |
95 | } | |
96 | #endif | |
e213a660 MH |
97 | if (vglobp) { |
98 | if (*vglobp) | |
99 | return (lastvgk = *vglobp++); | |
100 | lastvgk = 0; | |
101 | return (ESCAPE); | |
102 | } | |
103 | if (vmacp) { | |
104 | if (*vmacp) | |
105 | return(*vmacp++); | |
106 | /* End of a macro or set of nested macros */ | |
107 | vmacp = 0; | |
44232d5b MH |
108 | if (inopen == -1) /* don't screw up undo for esc esc */ |
109 | vundkind = VMANY; | |
e213a660 | 110 | inopen = 1; /* restore old setting now that macro done */ |
d266c416 | 111 | vch_mac = VC_NOTINMAC; |
e213a660 | 112 | } |
e213a660 MH |
113 | flusho(); |
114 | again: | |
1013c773 SL |
115 | if (setjmp(readbuf)) |
116 | goto getATTN; | |
47bdd628 SL |
117 | doingread = 1; |
118 | c = read(slevel == 0 ? 0 : ttyindes, &ch, 1); | |
119 | doingread = 0; | |
120 | if (c != 1) { | |
e213a660 MH |
121 | if (errno == EINTR) |
122 | goto getATTN; | |
123 | error("Input read error"); | |
124 | } | |
125 | c = ch & TRIM; | |
d266c416 MH |
126 | #ifdef BEEHIVE |
127 | if (XB && slevel==0 && c == ESCAPE) { | |
128 | if (read(0, &Peek2key, 1) != 1) | |
129 | goto getATTN; | |
130 | Peek2key &= TRIM; | |
131 | switch (Peek2key) { | |
132 | case 'C': /* SPOW mode sometimes sends \EC for space */ | |
133 | c = ' '; | |
134 | Peek2key = 0; | |
135 | break; | |
136 | case 'q': /* f2 -> ^C */ | |
137 | c = CTRL(c); | |
138 | Peek2key = 0; | |
139 | break; | |
140 | case 'p': /* f1 -> esc */ | |
141 | Peek2key = 0; | |
142 | break; | |
143 | } | |
144 | } | |
145 | #endif | |
e213a660 MH |
146 | |
147 | #ifdef UCVISUAL | |
148 | /* | |
149 | * The algorithm here is that of the UNIX kernel. | |
150 | * See the description in the programmers manual. | |
151 | */ | |
152 | if (UPPERCASE) { | |
153 | if (isupper(c)) | |
154 | c = tolower(c); | |
155 | if (c == '\\') { | |
156 | if (precbksl < 2) | |
157 | precbksl++; | |
158 | if (precbksl == 1) | |
159 | goto again; | |
160 | } else if (precbksl) { | |
161 | d = 0; | |
162 | if (islower(c)) | |
163 | d = toupper(c); | |
164 | else { | |
165 | colp = "({)}!|^~'~"; | |
166 | while (d = *colp++) | |
167 | if (d == c) { | |
168 | d = *colp++; | |
169 | break; | |
170 | } else | |
171 | colp++; | |
172 | } | |
173 | if (precbksl == 2) { | |
174 | if (!d) { | |
175 | Peekkey = c; | |
176 | precbksl = 0; | |
177 | c = '\\'; | |
178 | } | |
179 | } else if (d) | |
180 | c = d; | |
181 | else { | |
182 | Peekkey = c; | |
183 | precbksl = 0; | |
184 | c = '\\'; | |
185 | } | |
186 | } | |
187 | if (c != '\\') | |
188 | precbksl = 0; | |
189 | } | |
190 | #endif | |
191 | #ifdef TRACE | |
192 | if (trace) { | |
193 | if (!techoin) { | |
194 | tfixnl(); | |
195 | techoin = 1; | |
196 | fprintf(trace, "*** Input: "); | |
197 | } | |
198 | tracec(c); | |
199 | } | |
200 | #endif | |
201 | lastvgk = 0; | |
202 | return (c); | |
203 | } | |
204 | ||
205 | /* | |
206 | * Get a key, but if a delete, quit or attention | |
207 | * is typed return 0 so we will abort a partial command. | |
208 | */ | |
209 | getesc() | |
210 | { | |
211 | register int c; | |
212 | ||
213 | c = getkey(); | |
214 | switch (c) { | |
215 | ||
887e3e0d MH |
216 | case CTRL(v): |
217 | case CTRL(q): | |
218 | c = getkey(); | |
219 | return (c); | |
220 | ||
e213a660 MH |
221 | case ATTN: |
222 | case QUIT: | |
223 | ungetkey(c); | |
224 | return (0); | |
225 | ||
226 | case ESCAPE: | |
227 | return (0); | |
228 | } | |
229 | return (c); | |
230 | } | |
231 | ||
232 | /* | |
233 | * Peek at the next keystroke. | |
234 | */ | |
235 | peekkey() | |
236 | { | |
237 | ||
238 | Peekkey = getkey(); | |
239 | return (Peekkey); | |
240 | } | |
241 | ||
242 | /* | |
243 | * Read a line from the echo area, with single character prompt c. | |
244 | * A return value of 1 means the user blewit or blewit away. | |
245 | */ | |
246 | readecho(c) | |
247 | char c; | |
248 | { | |
249 | register char *sc = cursor; | |
250 | register int (*OP)(); | |
251 | bool waste; | |
252 | register int OPeek; | |
253 | ||
254 | if (WBOT == WECHO) | |
255 | vclean(); | |
256 | else | |
257 | vclrech(0); | |
258 | splitw++; | |
259 | vgoto(WECHO, 0); | |
260 | putchar(c); | |
261 | vclreol(); | |
262 | vgoto(WECHO, 1); | |
263 | cursor = linebuf; linebuf[0] = 0; genbuf[0] = c; | |
264 | if (peekbr()) { | |
265 | if (!INS[0] || (INS[0] & (QUOTE|TRIM)) == OVERBUF) | |
266 | goto blewit; | |
267 | vglobp = INS; | |
268 | } | |
269 | OP = Pline; Pline = normline; | |
04379bab | 270 | ignore(vgetline(0, genbuf + 1, &waste, c)); |
d266c416 MH |
271 | if (Outchar == termchar) |
272 | putchar('\n'); | |
e213a660 MH |
273 | vscrap(); |
274 | Pline = OP; | |
275 | if (Peekkey != ATTN && Peekkey != QUIT && Peekkey != CTRL(h)) { | |
276 | cursor = sc; | |
277 | vclreol(); | |
278 | return (0); | |
279 | } | |
280 | blewit: | |
281 | OPeek = Peekkey==CTRL(h) ? 0 : Peekkey; Peekkey = 0; | |
282 | splitw = 0; | |
283 | vclean(); | |
284 | vshow(dot, NOLINE); | |
285 | vnline(sc); | |
286 | Peekkey = OPeek; | |
287 | return (1); | |
288 | } | |
289 | ||
290 | /* | |
291 | * A complete command has been defined for | |
292 | * the purposes of repeat, so copy it from | |
293 | * the working to the previous command buffer. | |
294 | */ | |
295 | setLAST() | |
296 | { | |
297 | ||
d266c416 | 298 | if (vglobp || vmacp) |
e213a660 MH |
299 | return; |
300 | lastreg = vreg; | |
301 | lasthad = Xhadcnt; | |
302 | lastcnt = Xcnt; | |
303 | *lastcp = 0; | |
304 | CP(lastcmd, workcmd); | |
305 | } | |
306 | ||
307 | /* | |
308 | * Gather up some more text from an insert. | |
309 | * If the insertion buffer oveflows, then destroy | |
310 | * the repeatability of the insert. | |
311 | */ | |
312 | addtext(cp) | |
313 | char *cp; | |
314 | { | |
315 | ||
316 | if (vglobp) | |
317 | return; | |
318 | addto(INS, cp); | |
319 | if ((INS[0] & (QUOTE|TRIM)) == OVERBUF) | |
320 | lastcmd[0] = 0; | |
321 | } | |
322 | ||
323 | setDEL() | |
324 | { | |
325 | ||
326 | setBUF(DEL); | |
327 | } | |
328 | ||
329 | /* | |
330 | * Put text from cursor upto wcursor in BUF. | |
331 | */ | |
332 | setBUF(BUF) | |
333 | register char *BUF; | |
334 | { | |
335 | register int c; | |
336 | register char *wp = wcursor; | |
337 | ||
338 | c = *wp; | |
339 | *wp = 0; | |
340 | BUF[0] = 0; | |
341 | addto(BUF, cursor); | |
342 | *wp = c; | |
343 | } | |
344 | ||
345 | addto(buf, str) | |
346 | register char *buf, *str; | |
347 | { | |
348 | ||
349 | if ((buf[0] & (QUOTE|TRIM)) == OVERBUF) | |
350 | return; | |
351 | if (strlen(buf) + strlen(str) + 1 >= VBSIZE) { | |
352 | buf[0] = OVERBUF; | |
353 | return; | |
354 | } | |
355 | ignore(strcat(buf, str)); | |
356 | } | |
357 | ||
358 | /* | |
359 | * Note a change affecting a lot of lines, or non-visible | |
360 | * lines. If the parameter must is set, then we only want | |
361 | * to do this for open modes now; return and save for later | |
362 | * notification in visual. | |
363 | */ | |
364 | noteit(must) | |
365 | bool must; | |
366 | { | |
367 | register int sdl = destline, sdc = destcol; | |
368 | ||
369 | if (notecnt < 2 || !must && state == VISUAL) | |
370 | return (0); | |
371 | splitw++; | |
372 | if (WBOT == WECHO) | |
373 | vmoveitup(1, 1); | |
374 | vigoto(WECHO, 0); | |
375 | printf("%d %sline", notecnt, notesgn); | |
376 | if (notecnt > 1) | |
377 | putchar('s'); | |
378 | if (*notenam) { | |
379 | printf(" %s", notenam); | |
380 | if (*(strend(notenam) - 1) != 'e') | |
381 | putchar('e'); | |
382 | putchar('d'); | |
383 | } | |
384 | vclreol(); | |
385 | notecnt = 0; | |
386 | if (state != VISUAL) | |
387 | vcnt = vcline = 0; | |
388 | splitw = 0; | |
389 | if (state == ONEOPEN || state == CRTOPEN) | |
390 | vup1(); | |
391 | destline = sdl; destcol = sdc; | |
392 | return (1); | |
393 | } | |
394 | ||
395 | /* | |
396 | * Rrrrringgggggg. | |
397 | * If possible, use flash (VB). | |
398 | */ | |
399 | beep() | |
400 | { | |
401 | ||
402 | if (VB) | |
403 | vputp(VB, 0); | |
404 | else | |
405 | vputc(CTRL(g)); | |
406 | } | |
407 | ||
408 | /* | |
409 | * Map the command input character c, | |
410 | * for keypads and labelled keys which do cursor | |
411 | * motions. I.e. on an adm3a we might map ^K to ^P. | |
412 | * DM1520 for example has a lot of mappable characters. | |
413 | */ | |
414 | ||
415 | map(c,maps) | |
416 | register int c; | |
417 | register struct maps *maps; | |
418 | { | |
419 | register int d; | |
420 | register char *p, *q; | |
421 | char b[10]; /* Assumption: no keypad sends string longer than 10 */ | |
422 | ||
423 | /* | |
424 | * Mapping for special keys on the terminal only. | |
425 | * BUG: if there's a long sequence and it matches | |
426 | * some chars and then misses, we lose some chars. | |
427 | * | |
428 | * For this to work, some conditions must be met. | |
429 | * 1) Keypad sends SHORT (2 or 3 char) strings | |
430 | * 2) All strings sent are same length & similar | |
431 | * 3) The user is unlikely to type the first few chars of | |
432 | * one of these strings very fast. | |
433 | * Note: some code has been fixed up since the above was laid out, | |
434 | * so conditions 1 & 2 are probably not required anymore. | |
435 | * However, this hasn't been tested with any first char | |
436 | * that means anything else except escape. | |
437 | */ | |
438 | #ifdef MDEBUG | |
439 | if (trace) | |
440 | fprintf(trace,"map(%c): ",c); | |
441 | #endif | |
d266c416 MH |
442 | /* |
443 | * If c==0, the char came from getesc typing escape. Pass it through | |
444 | * unchanged. 0 messes up the following code anyway. | |
445 | */ | |
446 | if (c==0) | |
447 | return(0); | |
448 | ||
e213a660 MH |
449 | b[0] = c; |
450 | b[1] = 0; | |
451 | for (d=0; maps[d].mapto; d++) { | |
452 | #ifdef MDEBUG | |
453 | if (trace) | |
d266c416 | 454 | fprintf(trace,"\ntry '%s', ",maps[d].cap); |
e213a660 MH |
455 | #endif |
456 | if (p = maps[d].cap) { | |
457 | for (q=b; *p; p++, q++) { | |
458 | #ifdef MDEBUG | |
459 | if (trace) | |
460 | fprintf(trace,"q->b[%d], ",q-b); | |
461 | #endif | |
462 | if (*q==0) { | |
463 | /* | |
d266c416 MH |
464 | * Is there another char waiting? |
465 | * | |
e213a660 MH |
466 | * This test is oversimplified, but |
467 | * should work mostly. It handles the | |
468 | * case where we get an ESCAPE that | |
469 | * wasn't part of a keypad string. | |
470 | */ | |
471 | if ((c=='#' ? peekkey() : fastpeekkey()) == 0) { | |
472 | #ifdef MDEBUG | |
887e3e0d | 473 | if (trace) |
299f2784 | 474 | fprintf(trace,"fpk=0: will return '%c'",c); |
e213a660 | 475 | #endif |
887e3e0d | 476 | /* |
d266c416 MH |
477 | * Nothing waiting. Push back |
478 | * what we peeked at & return | |
479 | * failure (c). | |
480 | * | |
887e3e0d MH |
481 | * We want to be able to undo |
482 | * commands, but it's nonsense | |
483 | * to undo part of an insertion | |
484 | * so if in input mode don't. | |
485 | */ | |
299f2784 MH |
486 | #ifdef MDEBUG |
487 | if (trace) | |
488 | fprintf(trace, "Call macpush, b %d %d %d\n", b[0], b[1], b[2]); | |
489 | #endif | |
887e3e0d | 490 | macpush(&b[1],maps == arrows); |
299f2784 MH |
491 | #ifdef MDEBUG |
492 | if (trace) | |
493 | fprintf(trace, "return %d\n", c); | |
494 | #endif | |
e213a660 MH |
495 | return(c); |
496 | } | |
497 | *q = getkey(); | |
498 | q[1] = 0; | |
499 | } | |
500 | if (*p != *q) | |
501 | goto contin; | |
502 | } | |
d266c416 | 503 | macpush(maps[d].mapto,maps == arrows); |
e213a660 MH |
504 | c = getkey(); |
505 | #ifdef MDEBUG | |
d266c416 MH |
506 | if (trace) |
507 | fprintf(trace,"Success: push(%s), return %c",maps[d].mapto, c); | |
e213a660 MH |
508 | #endif |
509 | return(c); /* first char of map string */ | |
510 | contin:; | |
511 | } | |
512 | } | |
513 | #ifdef MDEBUG | |
514 | if (trace) | |
d266c416 | 515 | fprintf(trace,"Fail: push(%s), return %c", &b[1], c); |
e213a660 | 516 | #endif |
44232d5b | 517 | macpush(&b[1],0); |
e213a660 MH |
518 | return(c); |
519 | } | |
520 | ||
521 | /* | |
522 | * Push st onto the front of vmacp. This is tricky because we have to | |
523 | * worry about where vmacp was previously pointing. We also have to | |
524 | * check for overflow (which is typically from a recursive macro) | |
525 | * Finally we have to set a flag so the whole thing can be undone. | |
44232d5b MH |
526 | * canundo is 1 iff we want to be able to undo the macro. This |
527 | * is false for, for example, pushing back lookahead from fastpeekkey(), | |
528 | * since otherwise two fast escapes can clobber our undo. | |
e213a660 | 529 | */ |
44232d5b | 530 | macpush(st, canundo) |
e213a660 | 531 | char *st; |
44232d5b | 532 | int canundo; |
e213a660 MH |
533 | { |
534 | char tmpbuf[BUFSIZ]; | |
535 | ||
536 | if (st==0 || *st==0) | |
537 | return; | |
299f2784 | 538 | #ifdef MDEBUG |
e213a660 | 539 | if (trace) |
d266c416 | 540 | fprintf(trace, "macpush(%s), canundo=%d\n",st,canundo); |
e213a660 | 541 | #endif |
887e3e0d | 542 | if ((vmacp ? strlen(vmacp) : 0) + strlen(st) > BUFSIZ) |
e213a660 | 543 | error("Macro too long@ - maybe recursive?"); |
44232d5b | 544 | if (vmacp) { |
e213a660 | 545 | strcpy(tmpbuf, vmacp); |
887e3e0d MH |
546 | if (!FIXUNDO) |
547 | canundo = 0; /* can't undo inside a macro anyway */ | |
44232d5b | 548 | } |
e213a660 MH |
549 | strcpy(vmacbuf, st); |
550 | if (vmacp) | |
551 | strcat(vmacbuf, tmpbuf); | |
552 | vmacp = vmacbuf; | |
553 | /* arrange to be able to undo the whole macro */ | |
44232d5b | 554 | if (canundo) { |
d266c416 | 555 | #ifdef notdef |
44232d5b MH |
556 | otchng = tchng; |
557 | vsave(); | |
558 | saveall(); | |
887e3e0d | 559 | inopen = -1; /* no need to save since it had to be 1 or -1 before */ |
44232d5b | 560 | vundkind = VMANY; |
d266c416 MH |
561 | #endif |
562 | vch_mac = VC_NOCHANGE; | |
44232d5b | 563 | } |
887e3e0d MH |
564 | } |
565 | ||
e213a660 | 566 | #ifdef TRACE |
d266c416 MH |
567 | visdump(s) |
568 | char *s; | |
569 | { | |
570 | register int i; | |
571 | ||
572 | if (!trace) return; | |
573 | ||
574 | fprintf(trace, "\n%s: basWTOP=%d, basWLINES=%d, WTOP=%d, WBOT=%d, WLINES=%d, WCOLS=%d, WECHO=%d\n", | |
575 | s, basWTOP, basWLINES, WTOP, WBOT, WLINES, WCOLS, WECHO); | |
576 | fprintf(trace, " vcnt=%d, vcline=%d, cursor=%d, wcursor=%d, wdot=%d\n", | |
577 | vcnt, vcline, cursor-linebuf, wcursor-linebuf, wdot-zero); | |
578 | for (i=0; i<TUBELINES; i++) | |
579 | if (vtube[i] && *vtube[i]) | |
580 | fprintf(trace, "%d: '%s'\n", i, vtube[i]); | |
581 | tvliny(); | |
582 | } | |
583 | ||
887e3e0d MH |
584 | vudump(s) |
585 | char *s; | |
586 | { | |
d266c416 | 587 | register line *p; |
f0f2d980 | 588 | char savelb[1024]; |
d266c416 MH |
589 | |
590 | if (!trace) return; | |
591 | ||
592 | fprintf(trace, "\n%s: undkind=%d, vundkind=%d, unddel=%d, undap1=%d, undap2=%d,\n", | |
593 | s, undkind, vundkind, lineno(unddel), lineno(undap1), lineno(undap2)); | |
594 | fprintf(trace, " undadot=%d, dot=%d, dol=%d, unddol=%d, truedol=%d\n", | |
595 | lineno(undadot), lineno(dot), lineno(dol), lineno(unddol), lineno(truedol)); | |
f0f2d980 MH |
596 | fprintf(trace, " [\n"); |
597 | CP(savelb, linebuf); | |
598 | fprintf(trace, "linebuf = '%s'\n", linebuf); | |
599 | for (p=zero+1; p<=truedol; p++) { | |
d266c416 | 600 | fprintf(trace, "%o ", *p); |
f0f2d980 MH |
601 | getline(*p); |
602 | fprintf(trace, "'%s'\n", linebuf); | |
603 | } | |
d266c416 | 604 | fprintf(trace, "]\n"); |
f0f2d980 | 605 | CP(linebuf, savelb); |
e213a660 | 606 | } |
887e3e0d | 607 | #endif |
e213a660 MH |
608 | |
609 | /* | |
610 | * Get a count from the keyed input stream. | |
611 | * A zero count is indistinguishable from no count. | |
612 | */ | |
613 | vgetcnt() | |
614 | { | |
615 | register int c, cnt; | |
616 | ||
617 | cnt = 0; | |
618 | for (;;) { | |
619 | c = getkey(); | |
620 | if (!isdigit(c)) | |
621 | break; | |
622 | cnt *= 10, cnt += c - '0'; | |
623 | } | |
624 | ungetkey(c); | |
625 | Xhadcnt = 1; | |
626 | Xcnt = cnt; | |
627 | return(cnt); | |
628 | } | |
629 | ||
630 | /* | |
631 | * fastpeekkey is just like peekkey but insists the character come in | |
632 | * fast (within 1 second). This will succeed if it is the 2nd char of | |
633 | * a machine generated sequence (such as a function pad from an escape | |
634 | * flavor terminal) but fail for a human hitting escape then waiting. | |
635 | */ | |
636 | fastpeekkey() | |
637 | { | |
638 | int trapalarm(); | |
6a5f98c7 | 639 | int (*Oint)(); |
e213a660 MH |
640 | register int c; |
641 | ||
887e3e0d MH |
642 | /* |
643 | * If the user has set notimeout, we wait forever for a key. | |
644 | * If we are in a macro we do too, but since it's already | |
645 | * buffered internally it will return immediately. | |
646 | * In other cases we force this to die in 1 second. | |
647 | * This is pretty reliable (VMUNIX rounds it to .5 - 1.5 secs, | |
648 | * but UNIX truncates it to 0 - 1 secs) but due to system delays | |
649 | * there are times when arrow keys or very fast typing get counted | |
650 | * as separate. notimeout is provided for people who dislike such | |
651 | * nondeterminism. | |
652 | */ | |
299f2784 MH |
653 | #ifdef MDEBUG |
654 | if (trace) | |
655 | fprintf(trace,"\nfastpeekkey: ",c); | |
656 | #endif | |
6a5f98c7 | 657 | Oint = signal(SIGINT, trapalarm); |
887e3e0d MH |
658 | if (value(TIMEOUT) && inopen >= 0) { |
659 | signal(SIGALRM, trapalarm); | |
299f2784 MH |
660 | #ifdef MDEBUG |
661 | alarm(10); | |
662 | if (trace) | |
663 | fprintf(trace, "set alarm "); | |
664 | #else | |
887e3e0d | 665 | alarm(1); |
299f2784 | 666 | #endif |
887e3e0d | 667 | } |
e213a660 MH |
668 | CATCH |
669 | c = peekkey(); | |
670 | #ifdef MDEBUG | |
671 | if (trace) | |
672 | fprintf(trace,"[OK]",c); | |
673 | #endif | |
674 | alarm(0); | |
675 | ONERR | |
676 | c = 0; | |
677 | #ifdef MDEBUG | |
678 | if (trace) | |
299f2784 | 679 | fprintf(trace,"[TIMEOUT]",c); |
e213a660 MH |
680 | #endif |
681 | ENDCATCH | |
682 | #ifdef MDEBUG | |
683 | if (trace) | |
684 | fprintf(trace,"[fpk:%o]",c); | |
685 | #endif | |
6a5f98c7 | 686 | signal(SIGINT,Oint); |
e213a660 MH |
687 | return(c); |
688 | } | |
689 | ||
690 | trapalarm() { | |
691 | alarm(0); | |
6a5f98c7 RC |
692 | if (vcatch) |
693 | longjmp(vreslab,1); | |
e213a660 | 694 | } |