Commit | Line | Data |
---|---|---|
299f2784 | 1 | /* Copyright (c) 1981 Regents of the University of California */ |
47bdd628 | 2 | static char *sccsid = "@(#)ex_vget.c 6.5 %G%"; |
e213a660 MH |
3 | #include "ex.h" |
4 | #include "ex_tty.h" | |
5 | #include "ex_vis.h" | |
6 | ||
7 | /* | |
8 | * Input routines for open/visual. | |
9 | * We handle upper case only terminals in visual and reading from the | |
10 | * echo area here as well as notification on large changes | |
11 | * which appears in the echo area. | |
12 | */ | |
13 | ||
14 | /* | |
15 | * Return the key. | |
16 | */ | |
17 | ungetkey(c) | |
299f2784 | 18 | int c; /* mjm: char --> int */ |
e213a660 MH |
19 | { |
20 | ||
21 | if (Peekkey != ATTN) | |
22 | Peekkey = c; | |
23 | } | |
24 | ||
25 | /* | |
26 | * Return a keystroke, but never a ^@. | |
27 | */ | |
28 | getkey() | |
29 | { | |
299f2784 | 30 | register int c; /* mjm: char --> int */ |
e213a660 MH |
31 | |
32 | do { | |
33 | c = getbr(); | |
34 | if (c==0) | |
35 | beep(); | |
36 | } while (c == 0); | |
37 | return (c); | |
38 | } | |
39 | ||
40 | /* | |
41 | * Tell whether next keystroke would be a ^@. | |
42 | */ | |
43 | peekbr() | |
44 | { | |
45 | ||
46 | Peekkey = getbr(); | |
47 | return (Peekkey == 0); | |
48 | } | |
49 | ||
50 | short precbksl; | |
1013c773 | 51 | jmp_buf readbuf; |
47bdd628 | 52 | int doingread = 0; |
e213a660 MH |
53 | |
54 | /* | |
55 | * Get a keystroke, including a ^@. | |
56 | * If an key was returned with ungetkey, that | |
57 | * comes back first. Next comes unread input (e.g. | |
58 | * from repeating commands with .), and finally new | |
59 | * keystrokes. | |
60 | * | |
61 | * The hard work here is in mapping of \ escaped | |
62 | * characters on upper case only terminals. | |
63 | */ | |
64 | getbr() | |
65 | { | |
66 | char ch; | |
67 | register int c, d; | |
68 | register char *colp; | |
299f2784 | 69 | int cnt; |
d266c416 MH |
70 | #define BEEHIVE |
71 | #ifdef BEEHIVE | |
72 | static char Peek2key; | |
73 | #endif | |
74 | extern short slevel, ttyindes; | |
e213a660 MH |
75 | |
76 | getATTN: | |
77 | if (Peekkey) { | |
78 | c = Peekkey; | |
79 | Peekkey = 0; | |
80 | return (c); | |
81 | } | |
d266c416 MH |
82 | #ifdef BEEHIVE |
83 | if (Peek2key) { | |
84 | c = Peek2key; | |
85 | Peek2key = 0; | |
86 | return (c); | |
87 | } | |
88 | #endif | |
e213a660 MH |
89 | if (vglobp) { |
90 | if (*vglobp) | |
91 | return (lastvgk = *vglobp++); | |
92 | lastvgk = 0; | |
93 | return (ESCAPE); | |
94 | } | |
95 | if (vmacp) { | |
96 | if (*vmacp) | |
97 | return(*vmacp++); | |
98 | /* End of a macro or set of nested macros */ | |
99 | vmacp = 0; | |
44232d5b MH |
100 | if (inopen == -1) /* don't screw up undo for esc esc */ |
101 | vundkind = VMANY; | |
e213a660 | 102 | inopen = 1; /* restore old setting now that macro done */ |
d266c416 | 103 | vch_mac = VC_NOTINMAC; |
e213a660 | 104 | } |
e213a660 MH |
105 | flusho(); |
106 | again: | |
1013c773 SL |
107 | if (setjmp(readbuf)) |
108 | goto getATTN; | |
47bdd628 SL |
109 | doingread = 1; |
110 | c = read(slevel == 0 ? 0 : ttyindes, &ch, 1); | |
111 | doingread = 0; | |
112 | if (c != 1) { | |
e213a660 MH |
113 | if (errno == EINTR) |
114 | goto getATTN; | |
115 | error("Input read error"); | |
116 | } | |
117 | c = ch & TRIM; | |
d266c416 MH |
118 | #ifdef BEEHIVE |
119 | if (XB && slevel==0 && c == ESCAPE) { | |
120 | if (read(0, &Peek2key, 1) != 1) | |
121 | goto getATTN; | |
122 | Peek2key &= TRIM; | |
123 | switch (Peek2key) { | |
124 | case 'C': /* SPOW mode sometimes sends \EC for space */ | |
125 | c = ' '; | |
126 | Peek2key = 0; | |
127 | break; | |
128 | case 'q': /* f2 -> ^C */ | |
129 | c = CTRL(c); | |
130 | Peek2key = 0; | |
131 | break; | |
132 | case 'p': /* f1 -> esc */ | |
133 | Peek2key = 0; | |
134 | break; | |
135 | } | |
136 | } | |
137 | #endif | |
e213a660 MH |
138 | |
139 | #ifdef UCVISUAL | |
140 | /* | |
141 | * The algorithm here is that of the UNIX kernel. | |
142 | * See the description in the programmers manual. | |
143 | */ | |
144 | if (UPPERCASE) { | |
145 | if (isupper(c)) | |
146 | c = tolower(c); | |
147 | if (c == '\\') { | |
148 | if (precbksl < 2) | |
149 | precbksl++; | |
150 | if (precbksl == 1) | |
151 | goto again; | |
152 | } else if (precbksl) { | |
153 | d = 0; | |
154 | if (islower(c)) | |
155 | d = toupper(c); | |
156 | else { | |
157 | colp = "({)}!|^~'~"; | |
158 | while (d = *colp++) | |
159 | if (d == c) { | |
160 | d = *colp++; | |
161 | break; | |
162 | } else | |
163 | colp++; | |
164 | } | |
165 | if (precbksl == 2) { | |
166 | if (!d) { | |
167 | Peekkey = c; | |
168 | precbksl = 0; | |
169 | c = '\\'; | |
170 | } | |
171 | } else if (d) | |
172 | c = d; | |
173 | else { | |
174 | Peekkey = c; | |
175 | precbksl = 0; | |
176 | c = '\\'; | |
177 | } | |
178 | } | |
179 | if (c != '\\') | |
180 | precbksl = 0; | |
181 | } | |
182 | #endif | |
183 | #ifdef TRACE | |
184 | if (trace) { | |
185 | if (!techoin) { | |
186 | tfixnl(); | |
187 | techoin = 1; | |
188 | fprintf(trace, "*** Input: "); | |
189 | } | |
190 | tracec(c); | |
191 | } | |
192 | #endif | |
193 | lastvgk = 0; | |
194 | return (c); | |
195 | } | |
196 | ||
197 | /* | |
198 | * Get a key, but if a delete, quit or attention | |
199 | * is typed return 0 so we will abort a partial command. | |
200 | */ | |
201 | getesc() | |
202 | { | |
203 | register int c; | |
204 | ||
205 | c = getkey(); | |
206 | switch (c) { | |
207 | ||
887e3e0d MH |
208 | case CTRL(v): |
209 | case CTRL(q): | |
210 | c = getkey(); | |
211 | return (c); | |
212 | ||
e213a660 MH |
213 | case ATTN: |
214 | case QUIT: | |
215 | ungetkey(c); | |
216 | return (0); | |
217 | ||
218 | case ESCAPE: | |
219 | return (0); | |
220 | } | |
221 | return (c); | |
222 | } | |
223 | ||
224 | /* | |
225 | * Peek at the next keystroke. | |
226 | */ | |
227 | peekkey() | |
228 | { | |
229 | ||
230 | Peekkey = getkey(); | |
231 | return (Peekkey); | |
232 | } | |
233 | ||
234 | /* | |
235 | * Read a line from the echo area, with single character prompt c. | |
236 | * A return value of 1 means the user blewit or blewit away. | |
237 | */ | |
238 | readecho(c) | |
239 | char c; | |
240 | { | |
241 | register char *sc = cursor; | |
242 | register int (*OP)(); | |
243 | bool waste; | |
244 | register int OPeek; | |
245 | ||
246 | if (WBOT == WECHO) | |
247 | vclean(); | |
248 | else | |
249 | vclrech(0); | |
250 | splitw++; | |
251 | vgoto(WECHO, 0); | |
252 | putchar(c); | |
253 | vclreol(); | |
254 | vgoto(WECHO, 1); | |
255 | cursor = linebuf; linebuf[0] = 0; genbuf[0] = c; | |
256 | if (peekbr()) { | |
257 | if (!INS[0] || (INS[0] & (QUOTE|TRIM)) == OVERBUF) | |
258 | goto blewit; | |
259 | vglobp = INS; | |
260 | } | |
261 | OP = Pline; Pline = normline; | |
04379bab | 262 | ignore(vgetline(0, genbuf + 1, &waste, c)); |
d266c416 MH |
263 | if (Outchar == termchar) |
264 | putchar('\n'); | |
e213a660 MH |
265 | vscrap(); |
266 | Pline = OP; | |
267 | if (Peekkey != ATTN && Peekkey != QUIT && Peekkey != CTRL(h)) { | |
268 | cursor = sc; | |
269 | vclreol(); | |
270 | return (0); | |
271 | } | |
272 | blewit: | |
273 | OPeek = Peekkey==CTRL(h) ? 0 : Peekkey; Peekkey = 0; | |
274 | splitw = 0; | |
275 | vclean(); | |
276 | vshow(dot, NOLINE); | |
277 | vnline(sc); | |
278 | Peekkey = OPeek; | |
279 | return (1); | |
280 | } | |
281 | ||
282 | /* | |
283 | * A complete command has been defined for | |
284 | * the purposes of repeat, so copy it from | |
285 | * the working to the previous command buffer. | |
286 | */ | |
287 | setLAST() | |
288 | { | |
289 | ||
d266c416 | 290 | if (vglobp || vmacp) |
e213a660 MH |
291 | return; |
292 | lastreg = vreg; | |
293 | lasthad = Xhadcnt; | |
294 | lastcnt = Xcnt; | |
295 | *lastcp = 0; | |
296 | CP(lastcmd, workcmd); | |
297 | } | |
298 | ||
299 | /* | |
300 | * Gather up some more text from an insert. | |
301 | * If the insertion buffer oveflows, then destroy | |
302 | * the repeatability of the insert. | |
303 | */ | |
304 | addtext(cp) | |
305 | char *cp; | |
306 | { | |
307 | ||
308 | if (vglobp) | |
309 | return; | |
310 | addto(INS, cp); | |
311 | if ((INS[0] & (QUOTE|TRIM)) == OVERBUF) | |
312 | lastcmd[0] = 0; | |
313 | } | |
314 | ||
315 | setDEL() | |
316 | { | |
317 | ||
318 | setBUF(DEL); | |
319 | } | |
320 | ||
321 | /* | |
322 | * Put text from cursor upto wcursor in BUF. | |
323 | */ | |
324 | setBUF(BUF) | |
325 | register char *BUF; | |
326 | { | |
327 | register int c; | |
328 | register char *wp = wcursor; | |
329 | ||
330 | c = *wp; | |
331 | *wp = 0; | |
332 | BUF[0] = 0; | |
333 | addto(BUF, cursor); | |
334 | *wp = c; | |
335 | } | |
336 | ||
337 | addto(buf, str) | |
338 | register char *buf, *str; | |
339 | { | |
340 | ||
341 | if ((buf[0] & (QUOTE|TRIM)) == OVERBUF) | |
342 | return; | |
343 | if (strlen(buf) + strlen(str) + 1 >= VBSIZE) { | |
344 | buf[0] = OVERBUF; | |
345 | return; | |
346 | } | |
347 | ignore(strcat(buf, str)); | |
348 | } | |
349 | ||
350 | /* | |
351 | * Note a change affecting a lot of lines, or non-visible | |
352 | * lines. If the parameter must is set, then we only want | |
353 | * to do this for open modes now; return and save for later | |
354 | * notification in visual. | |
355 | */ | |
356 | noteit(must) | |
357 | bool must; | |
358 | { | |
359 | register int sdl = destline, sdc = destcol; | |
360 | ||
361 | if (notecnt < 2 || !must && state == VISUAL) | |
362 | return (0); | |
363 | splitw++; | |
364 | if (WBOT == WECHO) | |
365 | vmoveitup(1, 1); | |
366 | vigoto(WECHO, 0); | |
367 | printf("%d %sline", notecnt, notesgn); | |
368 | if (notecnt > 1) | |
369 | putchar('s'); | |
370 | if (*notenam) { | |
371 | printf(" %s", notenam); | |
372 | if (*(strend(notenam) - 1) != 'e') | |
373 | putchar('e'); | |
374 | putchar('d'); | |
375 | } | |
376 | vclreol(); | |
377 | notecnt = 0; | |
378 | if (state != VISUAL) | |
379 | vcnt = vcline = 0; | |
380 | splitw = 0; | |
381 | if (state == ONEOPEN || state == CRTOPEN) | |
382 | vup1(); | |
383 | destline = sdl; destcol = sdc; | |
384 | return (1); | |
385 | } | |
386 | ||
387 | /* | |
388 | * Rrrrringgggggg. | |
389 | * If possible, use flash (VB). | |
390 | */ | |
391 | beep() | |
392 | { | |
393 | ||
394 | if (VB) | |
395 | vputp(VB, 0); | |
396 | else | |
397 | vputc(CTRL(g)); | |
398 | } | |
399 | ||
400 | /* | |
401 | * Map the command input character c, | |
402 | * for keypads and labelled keys which do cursor | |
403 | * motions. I.e. on an adm3a we might map ^K to ^P. | |
404 | * DM1520 for example has a lot of mappable characters. | |
405 | */ | |
406 | ||
407 | map(c,maps) | |
408 | register int c; | |
409 | register struct maps *maps; | |
410 | { | |
411 | register int d; | |
412 | register char *p, *q; | |
413 | char b[10]; /* Assumption: no keypad sends string longer than 10 */ | |
414 | ||
415 | /* | |
416 | * Mapping for special keys on the terminal only. | |
417 | * BUG: if there's a long sequence and it matches | |
418 | * some chars and then misses, we lose some chars. | |
419 | * | |
420 | * For this to work, some conditions must be met. | |
421 | * 1) Keypad sends SHORT (2 or 3 char) strings | |
422 | * 2) All strings sent are same length & similar | |
423 | * 3) The user is unlikely to type the first few chars of | |
424 | * one of these strings very fast. | |
425 | * Note: some code has been fixed up since the above was laid out, | |
426 | * so conditions 1 & 2 are probably not required anymore. | |
427 | * However, this hasn't been tested with any first char | |
428 | * that means anything else except escape. | |
429 | */ | |
430 | #ifdef MDEBUG | |
431 | if (trace) | |
432 | fprintf(trace,"map(%c): ",c); | |
433 | #endif | |
d266c416 MH |
434 | /* |
435 | * If c==0, the char came from getesc typing escape. Pass it through | |
436 | * unchanged. 0 messes up the following code anyway. | |
437 | */ | |
438 | if (c==0) | |
439 | return(0); | |
440 | ||
e213a660 MH |
441 | b[0] = c; |
442 | b[1] = 0; | |
443 | for (d=0; maps[d].mapto; d++) { | |
444 | #ifdef MDEBUG | |
445 | if (trace) | |
d266c416 | 446 | fprintf(trace,"\ntry '%s', ",maps[d].cap); |
e213a660 MH |
447 | #endif |
448 | if (p = maps[d].cap) { | |
449 | for (q=b; *p; p++, q++) { | |
450 | #ifdef MDEBUG | |
451 | if (trace) | |
452 | fprintf(trace,"q->b[%d], ",q-b); | |
453 | #endif | |
454 | if (*q==0) { | |
455 | /* | |
d266c416 MH |
456 | * Is there another char waiting? |
457 | * | |
e213a660 MH |
458 | * This test is oversimplified, but |
459 | * should work mostly. It handles the | |
460 | * case where we get an ESCAPE that | |
461 | * wasn't part of a keypad string. | |
462 | */ | |
463 | if ((c=='#' ? peekkey() : fastpeekkey()) == 0) { | |
464 | #ifdef MDEBUG | |
887e3e0d | 465 | if (trace) |
299f2784 | 466 | fprintf(trace,"fpk=0: will return '%c'",c); |
e213a660 | 467 | #endif |
887e3e0d | 468 | /* |
d266c416 MH |
469 | * Nothing waiting. Push back |
470 | * what we peeked at & return | |
471 | * failure (c). | |
472 | * | |
887e3e0d MH |
473 | * We want to be able to undo |
474 | * commands, but it's nonsense | |
475 | * to undo part of an insertion | |
476 | * so if in input mode don't. | |
477 | */ | |
299f2784 MH |
478 | #ifdef MDEBUG |
479 | if (trace) | |
480 | fprintf(trace, "Call macpush, b %d %d %d\n", b[0], b[1], b[2]); | |
481 | #endif | |
887e3e0d | 482 | macpush(&b[1],maps == arrows); |
299f2784 MH |
483 | #ifdef MDEBUG |
484 | if (trace) | |
485 | fprintf(trace, "return %d\n", c); | |
486 | #endif | |
e213a660 MH |
487 | return(c); |
488 | } | |
489 | *q = getkey(); | |
490 | q[1] = 0; | |
491 | } | |
492 | if (*p != *q) | |
493 | goto contin; | |
494 | } | |
d266c416 | 495 | macpush(maps[d].mapto,maps == arrows); |
e213a660 MH |
496 | c = getkey(); |
497 | #ifdef MDEBUG | |
d266c416 MH |
498 | if (trace) |
499 | fprintf(trace,"Success: push(%s), return %c",maps[d].mapto, c); | |
e213a660 MH |
500 | #endif |
501 | return(c); /* first char of map string */ | |
502 | contin:; | |
503 | } | |
504 | } | |
505 | #ifdef MDEBUG | |
506 | if (trace) | |
d266c416 | 507 | fprintf(trace,"Fail: push(%s), return %c", &b[1], c); |
e213a660 | 508 | #endif |
44232d5b | 509 | macpush(&b[1],0); |
e213a660 MH |
510 | return(c); |
511 | } | |
512 | ||
513 | /* | |
514 | * Push st onto the front of vmacp. This is tricky because we have to | |
515 | * worry about where vmacp was previously pointing. We also have to | |
516 | * check for overflow (which is typically from a recursive macro) | |
517 | * Finally we have to set a flag so the whole thing can be undone. | |
44232d5b MH |
518 | * canundo is 1 iff we want to be able to undo the macro. This |
519 | * is false for, for example, pushing back lookahead from fastpeekkey(), | |
520 | * since otherwise two fast escapes can clobber our undo. | |
e213a660 | 521 | */ |
44232d5b | 522 | macpush(st, canundo) |
e213a660 | 523 | char *st; |
44232d5b | 524 | int canundo; |
e213a660 MH |
525 | { |
526 | char tmpbuf[BUFSIZ]; | |
527 | ||
528 | if (st==0 || *st==0) | |
529 | return; | |
299f2784 | 530 | #ifdef MDEBUG |
e213a660 | 531 | if (trace) |
d266c416 | 532 | fprintf(trace, "macpush(%s), canundo=%d\n",st,canundo); |
e213a660 | 533 | #endif |
887e3e0d | 534 | if ((vmacp ? strlen(vmacp) : 0) + strlen(st) > BUFSIZ) |
e213a660 | 535 | error("Macro too long@ - maybe recursive?"); |
44232d5b | 536 | if (vmacp) { |
e213a660 | 537 | strcpy(tmpbuf, vmacp); |
887e3e0d MH |
538 | if (!FIXUNDO) |
539 | canundo = 0; /* can't undo inside a macro anyway */ | |
44232d5b | 540 | } |
e213a660 MH |
541 | strcpy(vmacbuf, st); |
542 | if (vmacp) | |
543 | strcat(vmacbuf, tmpbuf); | |
544 | vmacp = vmacbuf; | |
545 | /* arrange to be able to undo the whole macro */ | |
44232d5b | 546 | if (canundo) { |
d266c416 | 547 | #ifdef notdef |
44232d5b MH |
548 | otchng = tchng; |
549 | vsave(); | |
550 | saveall(); | |
887e3e0d | 551 | inopen = -1; /* no need to save since it had to be 1 or -1 before */ |
44232d5b | 552 | vundkind = VMANY; |
d266c416 MH |
553 | #endif |
554 | vch_mac = VC_NOCHANGE; | |
44232d5b | 555 | } |
887e3e0d MH |
556 | } |
557 | ||
e213a660 | 558 | #ifdef TRACE |
d266c416 MH |
559 | visdump(s) |
560 | char *s; | |
561 | { | |
562 | register int i; | |
563 | ||
564 | if (!trace) return; | |
565 | ||
566 | fprintf(trace, "\n%s: basWTOP=%d, basWLINES=%d, WTOP=%d, WBOT=%d, WLINES=%d, WCOLS=%d, WECHO=%d\n", | |
567 | s, basWTOP, basWLINES, WTOP, WBOT, WLINES, WCOLS, WECHO); | |
568 | fprintf(trace, " vcnt=%d, vcline=%d, cursor=%d, wcursor=%d, wdot=%d\n", | |
569 | vcnt, vcline, cursor-linebuf, wcursor-linebuf, wdot-zero); | |
570 | for (i=0; i<TUBELINES; i++) | |
571 | if (vtube[i] && *vtube[i]) | |
572 | fprintf(trace, "%d: '%s'\n", i, vtube[i]); | |
573 | tvliny(); | |
574 | } | |
575 | ||
887e3e0d MH |
576 | vudump(s) |
577 | char *s; | |
578 | { | |
d266c416 | 579 | register line *p; |
f0f2d980 | 580 | char savelb[1024]; |
d266c416 MH |
581 | |
582 | if (!trace) return; | |
583 | ||
584 | fprintf(trace, "\n%s: undkind=%d, vundkind=%d, unddel=%d, undap1=%d, undap2=%d,\n", | |
585 | s, undkind, vundkind, lineno(unddel), lineno(undap1), lineno(undap2)); | |
586 | fprintf(trace, " undadot=%d, dot=%d, dol=%d, unddol=%d, truedol=%d\n", | |
587 | lineno(undadot), lineno(dot), lineno(dol), lineno(unddol), lineno(truedol)); | |
f0f2d980 MH |
588 | fprintf(trace, " [\n"); |
589 | CP(savelb, linebuf); | |
590 | fprintf(trace, "linebuf = '%s'\n", linebuf); | |
591 | for (p=zero+1; p<=truedol; p++) { | |
d266c416 | 592 | fprintf(trace, "%o ", *p); |
f0f2d980 MH |
593 | getline(*p); |
594 | fprintf(trace, "'%s'\n", linebuf); | |
595 | } | |
d266c416 | 596 | fprintf(trace, "]\n"); |
f0f2d980 | 597 | CP(linebuf, savelb); |
e213a660 | 598 | } |
887e3e0d | 599 | #endif |
e213a660 MH |
600 | |
601 | /* | |
602 | * Get a count from the keyed input stream. | |
603 | * A zero count is indistinguishable from no count. | |
604 | */ | |
605 | vgetcnt() | |
606 | { | |
607 | register int c, cnt; | |
608 | ||
609 | cnt = 0; | |
610 | for (;;) { | |
611 | c = getkey(); | |
612 | if (!isdigit(c)) | |
613 | break; | |
614 | cnt *= 10, cnt += c - '0'; | |
615 | } | |
616 | ungetkey(c); | |
617 | Xhadcnt = 1; | |
618 | Xcnt = cnt; | |
619 | return(cnt); | |
620 | } | |
621 | ||
622 | /* | |
623 | * fastpeekkey is just like peekkey but insists the character come in | |
624 | * fast (within 1 second). This will succeed if it is the 2nd char of | |
625 | * a machine generated sequence (such as a function pad from an escape | |
626 | * flavor terminal) but fail for a human hitting escape then waiting. | |
627 | */ | |
628 | fastpeekkey() | |
629 | { | |
630 | int trapalarm(); | |
631 | register int c; | |
632 | ||
887e3e0d MH |
633 | /* |
634 | * If the user has set notimeout, we wait forever for a key. | |
635 | * If we are in a macro we do too, but since it's already | |
636 | * buffered internally it will return immediately. | |
637 | * In other cases we force this to die in 1 second. | |
638 | * This is pretty reliable (VMUNIX rounds it to .5 - 1.5 secs, | |
639 | * but UNIX truncates it to 0 - 1 secs) but due to system delays | |
640 | * there are times when arrow keys or very fast typing get counted | |
641 | * as separate. notimeout is provided for people who dislike such | |
642 | * nondeterminism. | |
643 | */ | |
299f2784 MH |
644 | #ifdef MDEBUG |
645 | if (trace) | |
646 | fprintf(trace,"\nfastpeekkey: ",c); | |
647 | #endif | |
887e3e0d MH |
648 | if (value(TIMEOUT) && inopen >= 0) { |
649 | signal(SIGALRM, trapalarm); | |
299f2784 MH |
650 | #ifdef MDEBUG |
651 | alarm(10); | |
652 | if (trace) | |
653 | fprintf(trace, "set alarm "); | |
654 | #else | |
887e3e0d | 655 | alarm(1); |
299f2784 | 656 | #endif |
887e3e0d | 657 | } |
e213a660 MH |
658 | CATCH |
659 | c = peekkey(); | |
660 | #ifdef MDEBUG | |
661 | if (trace) | |
662 | fprintf(trace,"[OK]",c); | |
663 | #endif | |
664 | alarm(0); | |
665 | ONERR | |
666 | c = 0; | |
667 | #ifdef MDEBUG | |
668 | if (trace) | |
299f2784 | 669 | fprintf(trace,"[TIMEOUT]",c); |
e213a660 MH |
670 | #endif |
671 | ENDCATCH | |
672 | #ifdef MDEBUG | |
673 | if (trace) | |
674 | fprintf(trace,"[fpk:%o]",c); | |
675 | #endif | |
676 | return(c); | |
677 | } | |
678 | ||
679 | trapalarm() { | |
680 | alarm(0); | |
681 | longjmp(vreslab,1); | |
682 | } |