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1 | /* |
2 | * Copyright (c) 1988 Mark Nudleman | |
3 | * Copyright (c) 1988 Regents of the University of California. | |
4 | * All rights reserved. | |
5 | * | |
bfe13c81 KB |
6 | * Redistribution and use in source and binary forms are permitted |
7 | * provided that the above copyright notice and this paragraph are | |
8 | * duplicated in all such forms and that any documentation, | |
9 | * advertising materials, and other materials related to such | |
10 | * distribution and use acknowledge that the software was developed | |
a942b40b KB |
11 | * by Mark Nudleman and the University of California, Berkeley. The |
12 | * name of Mark Nudleman or the | |
bfe13c81 KB |
13 | * University may not be used to endorse or promote products derived |
14 | * from this software without specific prior written permission. | |
15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
17 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
18 | */ | |
19 | ||
20 | #ifndef lint | |
a942b40b | 21 | static char sccsid[] = "@(#)command.c 5.6 (Berkeley) %G%"; |
bfe13c81 KB |
22 | #endif /* not lint */ |
23 | ||
24 | /* | |
25 | * User-level command processor. | |
26 | */ | |
27 | ||
28 | #include "less.h" | |
29 | #include "position.h" | |
30 | #include "cmd.h" | |
31 | ||
32 | #define NO_MCA 0 | |
33 | #define MCA_DONE 1 | |
34 | #define MCA_MORE 2 | |
35 | ||
36 | extern int erase_char, kill_char; | |
37 | extern int ispipe; | |
38 | extern int sigs; | |
39 | extern int quit_at_eof; | |
40 | extern int hit_eof; | |
41 | extern int sc_width; | |
42 | extern int sc_height; | |
43 | extern int sc_window; | |
44 | extern int curr_ac; | |
45 | extern int ac; | |
46 | extern int quitting; | |
47 | extern int scroll; | |
48 | extern char *first_cmd; | |
49 | extern char *every_first_cmd; | |
50 | extern char version[]; | |
51 | extern char *current_file; | |
bfe13c81 | 52 | extern char *editor; |
bfe13c81 KB |
53 | extern int screen_trashed; /* The screen has been overwritten */ |
54 | ||
55 | static char cmdbuf[120]; /* Buffer for holding a multi-char command */ | |
bfe13c81 KB |
56 | static char *cp; /* Pointer into cmdbuf */ |
57 | static int cmd_col; /* Current column of the multi-char command */ | |
58 | static int mca; /* The multicharacter command (action) */ | |
59 | static int last_mca; /* The previous mca */ | |
60 | static int number; /* The number typed by the user */ | |
61 | static int wsearch; /* Search for matches (1) or non-matches (0) */ | |
62 | ||
63 | /* | |
64 | * Reset command buffer (to empty). | |
65 | */ | |
66 | cmd_reset() | |
67 | { | |
68 | cp = cmdbuf; | |
69 | } | |
70 | ||
71 | /* | |
72 | * Backspace in command buffer. | |
73 | */ | |
74 | static int | |
75 | cmd_erase() | |
76 | { | |
77 | if (cp == cmdbuf) | |
78 | /* | |
79 | * Backspace past beginning of the string: | |
80 | * this usually means abort the command. | |
81 | */ | |
82 | return (1); | |
83 | ||
84 | if (control_char(*--cp)) | |
85 | { | |
86 | /* | |
87 | * Erase an extra character, for the carat. | |
88 | */ | |
89 | backspace(); | |
90 | cmd_col--; | |
91 | } | |
92 | backspace(); | |
93 | cmd_col--; | |
94 | return (0); | |
95 | } | |
96 | ||
97 | /* | |
98 | * Set up the display to start a new multi-character command. | |
99 | */ | |
100 | start_mca(action, prompt) | |
101 | int action; | |
102 | char *prompt; | |
103 | { | |
104 | lower_left(); | |
105 | clear_eol(); | |
106 | putstr(prompt); | |
107 | cmd_col = strlen(prompt); | |
108 | mca = action; | |
109 | } | |
110 | ||
111 | /* | |
112 | * Process a single character of a multi-character command, such as | |
113 | * a number, or the pattern of a search command. | |
114 | */ | |
115 | static int | |
116 | cmd_char(c) | |
117 | int c; | |
118 | { | |
119 | if (c == erase_char) | |
120 | { | |
121 | if (cmd_erase()) | |
122 | return (1); | |
123 | } else if (c == kill_char) | |
124 | { | |
125 | /* {{ Could do this faster, but who cares? }} */ | |
126 | while (cmd_erase() == 0) | |
127 | ; | |
128 | } else if (cp >= &cmdbuf[sizeof(cmdbuf)-1]) | |
129 | { | |
130 | /* | |
131 | * No room in the command buffer. | |
132 | */ | |
133 | bell(); | |
134 | } else if (cmd_col >= sc_width-3) | |
135 | { | |
136 | /* | |
137 | * No room on the screen. | |
138 | * {{ Could get fancy here; maybe shift the displayed | |
139 | * line and make room for more chars, like ksh. }} | |
140 | */ | |
141 | bell(); | |
142 | } else | |
143 | { | |
144 | /* | |
145 | * Append the character to the string. | |
146 | */ | |
147 | *cp++ = c; | |
148 | if (control_char(c)) | |
149 | { | |
150 | putchr('^'); | |
151 | cmd_col++; | |
152 | c = carat_char(c); | |
153 | } | |
154 | putchr(c); | |
155 | cmd_col++; | |
156 | } | |
157 | return (0); | |
158 | } | |
159 | ||
160 | /* | |
161 | * Return the number currently in the command buffer. | |
162 | */ | |
163 | static int | |
164 | cmd_int() | |
165 | { | |
166 | *cp = '\0'; | |
167 | cp = cmdbuf; | |
168 | return (atoi(cmdbuf)); | |
169 | } | |
170 | ||
171 | /* | |
172 | * Move the cursor to lower left before executing a command. | |
173 | * This looks nicer if the command takes a long time before | |
174 | * updating the screen. | |
175 | */ | |
176 | static void | |
177 | cmd_exec() | |
178 | { | |
179 | lower_left(); | |
180 | flush(); | |
181 | } | |
182 | ||
183 | /* | |
184 | * Display the appropriate prompt. | |
185 | */ | |
186 | static void | |
187 | prompt() | |
188 | { | |
189 | register char *p; | |
190 | ||
191 | if (first_cmd != NULL && *first_cmd != '\0') | |
192 | { | |
193 | /* | |
194 | * No prompt necessary if commands are from first_cmd | |
195 | * rather than from the user. | |
196 | */ | |
197 | return; | |
198 | } | |
199 | ||
200 | /* | |
201 | * If nothing is displayed yet, display starting from line 1. | |
202 | */ | |
203 | if (position(TOP) == NULL_POSITION) | |
204 | jump_back(1); | |
205 | else if (screen_trashed) | |
206 | repaint(); | |
207 | ||
208 | /* | |
209 | * If the -E flag is set and we've hit EOF on the last file, quit. | |
210 | */ | |
211 | if (quit_at_eof == 2 && hit_eof && curr_ac + 1 >= ac) | |
212 | quit(); | |
213 | ||
214 | /* | |
215 | * Select the proper prompt and display it. | |
216 | */ | |
217 | lower_left(); | |
218 | clear_eol(); | |
219 | p = pr_string(); | |
220 | if (p == NULL) | |
221 | putchr(':'); | |
222 | else | |
223 | { | |
224 | so_enter(); | |
225 | putstr(p); | |
226 | so_exit(); | |
227 | } | |
228 | } | |
229 | ||
230 | /* | |
231 | * Get command character. | |
232 | * The character normally comes from the keyboard, | |
233 | * but may come from the "first_cmd" string. | |
234 | */ | |
235 | static int | |
236 | getcc() | |
237 | { | |
238 | if (first_cmd == NULL) | |
239 | return (getchr()); | |
240 | ||
241 | if (*first_cmd == '\0') | |
242 | { | |
243 | /* | |
244 | * Reached end of first_cmd input. | |
245 | */ | |
246 | first_cmd = NULL; | |
247 | if (cp > cmdbuf && position(TOP) == NULL_POSITION) | |
248 | { | |
249 | /* | |
250 | * Command is incomplete, so try to complete it. | |
251 | * There are only two cases: | |
252 | * 1. We have "/string" but no newline. Add the \n. | |
253 | * 2. We have a number but no command. Treat as #g. | |
254 | * (This is all pretty hokey.) | |
255 | */ | |
256 | if (mca != A_DIGIT) | |
257 | /* Not a number; must be search string */ | |
258 | return ('\n'); | |
259 | else | |
260 | /* A number; append a 'g' */ | |
261 | return ('g'); | |
262 | } | |
263 | return (getchr()); | |
264 | } | |
265 | return (*first_cmd++); | |
266 | } | |
267 | ||
268 | /* | |
269 | * Execute a multicharacter command. | |
270 | */ | |
271 | static void | |
272 | exec_mca() | |
273 | { | |
274 | register char *p; | |
bfe13c81 KB |
275 | |
276 | *cp = '\0'; | |
277 | cmd_exec(); | |
278 | switch (mca) | |
279 | { | |
280 | case A_F_SEARCH: | |
281 | search(1, cmdbuf, number, wsearch); | |
282 | break; | |
283 | case A_B_SEARCH: | |
284 | search(0, cmdbuf, number, wsearch); | |
285 | break; | |
286 | case A_FIRSTCMD: | |
287 | /* | |
288 | * Skip leading spaces or + signs in the string. | |
289 | */ | |
290 | for (p = cmdbuf; *p == '+' || *p == ' '; p++) | |
291 | ; | |
292 | if (every_first_cmd != NULL) | |
293 | free(every_first_cmd); | |
294 | if (*p == '\0') | |
295 | every_first_cmd = NULL; | |
296 | else | |
297 | every_first_cmd = save(p); | |
298 | break; | |
299 | case A_TOGGLE_OPTION: | |
300 | toggle_option(cmdbuf, 1); | |
301 | break; | |
302 | case A_EXAMINE: | |
303 | /* | |
304 | * Ignore leading spaces in the filename. | |
305 | */ | |
306 | for (p = cmdbuf; *p == ' '; p++) | |
307 | ; | |
308 | edit(glob(p)); | |
309 | break; | |
bfe13c81 KB |
310 | } |
311 | } | |
312 | ||
313 | /* | |
314 | * Add a character to a multi-character command. | |
315 | */ | |
316 | static int | |
317 | mca_char(c) | |
318 | int c; | |
319 | { | |
320 | switch (mca) | |
321 | { | |
322 | case 0: | |
323 | /* | |
324 | * Not in a multicharacter command. | |
325 | */ | |
326 | return (NO_MCA); | |
327 | ||
328 | case A_PREFIX: | |
329 | /* | |
330 | * In the prefix of a command. | |
331 | */ | |
332 | return (NO_MCA); | |
333 | ||
334 | case A_DIGIT: | |
335 | /* | |
336 | * Entering digits of a number. | |
337 | * Terminated by a non-digit. | |
338 | */ | |
339 | if ((c < '0' || c > '9') && | |
340 | c != erase_char && c != kill_char) | |
341 | { | |
342 | /* | |
343 | * Not part of the number. | |
344 | * Treat as a normal command character. | |
345 | */ | |
346 | number = cmd_int(); | |
347 | mca = 0; | |
348 | return (NO_MCA); | |
349 | } | |
350 | break; | |
351 | ||
352 | case A_TOGGLE_OPTION: | |
353 | /* | |
354 | * Special case for the TOGGLE_OPTION command. | |
355 | * if the option letter which was entered is a | |
356 | * single-char option, execute the command immediately, | |
357 | * so he doesn't have to hit RETURN. | |
358 | */ | |
359 | if (cp == cmdbuf && c != erase_char && c != kill_char && | |
360 | single_char_option(c)) | |
361 | { | |
362 | cmdbuf[0] = c; | |
363 | cmdbuf[1] = '\0'; | |
364 | toggle_option(cmdbuf, 1); | |
365 | return (MCA_DONE); | |
366 | } | |
367 | break; | |
368 | } | |
369 | ||
370 | /* | |
371 | * Any other multicharacter command | |
372 | * is terminated by a newline. | |
373 | */ | |
374 | if (c == '\n' || c == '\r') | |
375 | { | |
376 | /* | |
377 | * Execute the command. | |
378 | */ | |
379 | exec_mca(); | |
380 | return (MCA_DONE); | |
381 | } | |
382 | /* | |
383 | * Append the char to the command buffer. | |
384 | */ | |
385 | if (cmd_char(c)) | |
386 | /* | |
387 | * Abort the multi-char command. | |
388 | */ | |
389 | return (MCA_DONE); | |
390 | /* | |
391 | * Need another character. | |
392 | */ | |
393 | return (MCA_MORE); | |
394 | } | |
395 | ||
396 | /* | |
397 | * Main command processor. | |
398 | * Accept and execute commands until a quit command, then return. | |
399 | */ | |
400 | public void | |
401 | commands() | |
402 | { | |
403 | register int c; | |
404 | register int action; | |
405 | ||
406 | last_mca = 0; | |
407 | scroll = (sc_height + 1) / 2; | |
408 | ||
409 | for (;;) | |
410 | { | |
411 | mca = 0; | |
412 | number = 0; | |
413 | ||
414 | /* | |
415 | * See if any signals need processing. | |
416 | */ | |
417 | if (sigs) | |
418 | { | |
419 | psignals(); | |
420 | if (quitting) | |
421 | quit(); | |
422 | } | |
423 | ||
424 | /* | |
425 | * Display prompt and accept a character. | |
426 | */ | |
427 | cmd_reset(); | |
428 | prompt(); | |
429 | noprefix(); | |
430 | c = getcc(); | |
431 | ||
432 | again: | |
433 | if (sigs) | |
434 | continue; | |
435 | ||
436 | /* | |
437 | * If we are in a multicharacter command, call mca_char. | |
438 | * Otherwise we call cmd_decode to determine the | |
439 | * action to be performed. | |
440 | */ | |
441 | if (mca) | |
442 | switch (mca_char(c)) | |
443 | { | |
444 | case MCA_MORE: | |
445 | /* | |
446 | * Need another character. | |
447 | */ | |
448 | c = getcc(); | |
449 | goto again; | |
450 | case MCA_DONE: | |
451 | /* | |
452 | * Command has been handled by mca_char. | |
453 | * Start clean with a prompt. | |
454 | */ | |
455 | continue; | |
456 | case NO_MCA: | |
457 | /* | |
458 | * Not a multi-char command | |
459 | * (at least, not anymore). | |
460 | */ | |
461 | break; | |
462 | } | |
463 | ||
464 | /* | |
465 | * Decode the command character and decide what to do. | |
466 | */ | |
467 | switch (action = cmd_decode(c)) | |
468 | { | |
469 | case A_DIGIT: | |
470 | /* | |
471 | * First digit of a number. | |
472 | */ | |
473 | start_mca(A_DIGIT, ":"); | |
474 | goto again; | |
475 | ||
476 | case A_F_SCREEN: | |
477 | /* | |
478 | * Forward one screen. | |
479 | */ | |
480 | if (number <= 0) | |
481 | number = sc_window; | |
482 | if (number <= 0) | |
483 | number = sc_height - 1; | |
484 | cmd_exec(); | |
485 | forward(number, 1); | |
486 | break; | |
487 | ||
488 | case A_B_SCREEN: | |
489 | /* | |
490 | * Backward one screen. | |
491 | */ | |
492 | if (number <= 0) | |
493 | number = sc_window; | |
494 | if (number <= 0) | |
495 | number = sc_height - 1; | |
496 | cmd_exec(); | |
497 | backward(number, 1); | |
498 | break; | |
499 | ||
500 | case A_F_LINE: | |
501 | /* | |
502 | * Forward N (default 1) line. | |
503 | */ | |
504 | if (number <= 0) | |
505 | number = 1; | |
506 | cmd_exec(); | |
507 | forward(number, 0); | |
508 | break; | |
509 | ||
510 | case A_B_LINE: | |
511 | /* | |
512 | * Backward N (default 1) line. | |
513 | */ | |
514 | if (number <= 0) | |
515 | number = 1; | |
516 | cmd_exec(); | |
517 | backward(number, 0); | |
518 | break; | |
519 | ||
520 | case A_F_SCROLL: | |
521 | /* | |
522 | * Forward N lines | |
523 | * (default same as last 'd' or 'u' command). | |
524 | */ | |
525 | if (number > 0) | |
526 | scroll = number; | |
527 | cmd_exec(); | |
528 | forward(scroll, 0); | |
529 | break; | |
530 | ||
531 | case A_B_SCROLL: | |
532 | /* | |
533 | * Forward N lines | |
534 | * (default same as last 'd' or 'u' command). | |
535 | */ | |
536 | if (number > 0) | |
537 | scroll = number; | |
538 | cmd_exec(); | |
539 | backward(scroll, 0); | |
540 | break; | |
541 | ||
542 | case A_FREPAINT: | |
543 | /* | |
544 | * Flush buffers, then repaint screen. | |
545 | * Don't flush the buffers on a pipe! | |
546 | */ | |
547 | if (!ispipe) | |
548 | { | |
549 | ch_init(0, 0); | |
550 | clr_linenum(); | |
551 | } | |
552 | /* FALLTHRU */ | |
553 | case A_REPAINT: | |
554 | /* | |
555 | * Repaint screen. | |
556 | */ | |
557 | cmd_exec(); | |
558 | repaint(); | |
559 | break; | |
560 | ||
561 | case A_GOLINE: | |
562 | /* | |
563 | * Go to line N, default beginning of file. | |
564 | */ | |
565 | if (number <= 0) | |
566 | number = 1; | |
567 | cmd_exec(); | |
568 | jump_back(number); | |
569 | break; | |
570 | ||
571 | case A_PERCENT: | |
572 | /* | |
573 | * Go to a specified percentage into the file. | |
574 | */ | |
575 | if (number < 0) | |
576 | number = 0; | |
577 | if (number > 100) | |
578 | number = 100; | |
579 | cmd_exec(); | |
580 | jump_percent(number); | |
581 | break; | |
582 | ||
583 | case A_GOEND: | |
584 | /* | |
585 | * Go to line N, default end of file. | |
586 | */ | |
587 | cmd_exec(); | |
588 | if (number <= 0) | |
589 | jump_forw(); | |
590 | else | |
591 | jump_back(number); | |
592 | break; | |
593 | ||
594 | case A_STAT: | |
595 | /* | |
596 | * Print file name, etc. | |
597 | */ | |
598 | cmd_exec(); | |
599 | error(eq_message()); | |
600 | break; | |
601 | ||
602 | case A_VERSION: | |
603 | /* | |
604 | * Print version number, without the "@(#)". | |
605 | */ | |
606 | cmd_exec(); | |
607 | error(version+4); | |
608 | break; | |
609 | ||
610 | case A_QUIT: | |
611 | /* | |
612 | * Exit. | |
613 | */ | |
614 | quit(); | |
615 | ||
616 | case A_F_SEARCH: | |
617 | case A_B_SEARCH: | |
618 | /* | |
619 | * Search for a pattern. | |
620 | * Accept chars of the pattern until \n. | |
621 | */ | |
622 | if (number <= 0) | |
623 | number = 1; | |
624 | start_mca(action, (action==A_F_SEARCH) ? "/" : "?"); | |
625 | last_mca = mca; | |
626 | wsearch = 1; | |
627 | c = getcc(); | |
628 | if (c == '!') | |
629 | { | |
630 | /* | |
631 | * Invert the sense of the search. | |
632 | * Set wsearch to 0 and get a new | |
633 | * character for the start of the pattern. | |
634 | */ | |
635 | start_mca(action, | |
636 | (action==A_F_SEARCH) ? "!/" : "!?"); | |
637 | wsearch = 0; | |
638 | c = getcc(); | |
639 | } | |
640 | goto again; | |
641 | ||
642 | case A_AGAIN_SEARCH: | |
643 | /* | |
644 | * Repeat previous search. | |
645 | */ | |
646 | if (number <= 0) | |
647 | number = 1; | |
648 | if (wsearch) | |
649 | start_mca(last_mca, | |
650 | (last_mca==A_F_SEARCH) ? "/" : "?"); | |
651 | else | |
652 | start_mca(last_mca, | |
653 | (last_mca==A_F_SEARCH) ? "!/" : "!?"); | |
654 | cmd_exec(); | |
655 | search(mca==A_F_SEARCH, (char *)NULL, number, wsearch); | |
656 | break; | |
657 | ||
658 | case A_HELP: | |
659 | /* | |
660 | * Help. | |
661 | */ | |
662 | lower_left(); | |
663 | clear_eol(); | |
664 | putstr("help"); | |
665 | cmd_exec(); | |
666 | help(); | |
667 | break; | |
668 | ||
669 | case A_EXAMINE: | |
670 | /* | |
671 | * Edit a new file. Get the filename. | |
672 | */ | |
673 | cmd_reset(); | |
674 | start_mca(A_EXAMINE, "Examine: "); | |
675 | c = getcc(); | |
676 | goto again; | |
677 | ||
678 | case A_VISUAL: | |
679 | /* | |
680 | * Invoke an editor on the input file. | |
681 | */ | |
bfe13c81 KB |
682 | if (ispipe) |
683 | { | |
684 | error("Cannot edit standard input"); | |
685 | break; | |
686 | } | |
687 | /* | |
688 | * Try to pass the line number to the editor. | |
689 | */ | |
690 | cmd_exec(); | |
691 | c = currline(MIDDLE); | |
692 | if (c == 0) | |
d8cd1060 | 693 | (void)sprintf(cmdbuf, "%s %s", |
bfe13c81 KB |
694 | editor, current_file); |
695 | else | |
d8cd1060 | 696 | (void)sprintf(cmdbuf, "%s +%d %s", |
bfe13c81 KB |
697 | editor, c, current_file); |
698 | lsystem(cmdbuf); | |
699 | ch_init(0, 0); | |
700 | clr_linenum(); | |
701 | break; | |
bfe13c81 KB |
702 | |
703 | case A_NEXT_FILE: | |
704 | /* | |
705 | * Examine next file. | |
706 | */ | |
707 | if (number <= 0) | |
708 | number = 1; | |
709 | next_file(number); | |
710 | break; | |
711 | ||
712 | case A_PREV_FILE: | |
713 | /* | |
714 | * Examine previous file. | |
715 | */ | |
716 | if (number <= 0) | |
717 | number = 1; | |
718 | prev_file(number); | |
719 | break; | |
720 | ||
721 | case A_TOGGLE_OPTION: | |
722 | /* | |
723 | * Toggle a flag setting. | |
724 | */ | |
725 | cmd_reset(); | |
726 | start_mca(A_TOGGLE_OPTION, "-"); | |
727 | c = getcc(); | |
728 | goto again; | |
729 | ||
730 | case A_DISP_OPTION: | |
731 | /* | |
732 | * Report a flag setting. | |
733 | */ | |
734 | cmd_reset(); | |
735 | start_mca(A_DISP_OPTION, "_"); | |
736 | c = getcc(); | |
737 | if (c == erase_char || c == kill_char) | |
738 | break; | |
739 | cmdbuf[0] = c; | |
740 | cmdbuf[1] = '\0'; | |
741 | toggle_option(cmdbuf, 0); | |
742 | break; | |
743 | ||
744 | case A_FIRSTCMD: | |
745 | /* | |
746 | * Set an initial command for new files. | |
747 | */ | |
748 | cmd_reset(); | |
749 | start_mca(A_FIRSTCMD, "+"); | |
750 | c = getcc(); | |
751 | goto again; | |
752 | ||
bfe13c81 KB |
753 | case A_SETMARK: |
754 | /* | |
755 | * Set a mark. | |
756 | */ | |
757 | lower_left(); | |
758 | clear_eol(); | |
759 | start_mca(A_SETMARK, "mark: "); | |
760 | c = getcc(); | |
761 | if (c == erase_char || c == kill_char) | |
762 | break; | |
763 | setmark(c); | |
764 | break; | |
765 | ||
766 | case A_GOMARK: | |
767 | /* | |
768 | * Go to a mark. | |
769 | */ | |
770 | lower_left(); | |
771 | clear_eol(); | |
772 | start_mca(A_GOMARK, "goto mark: "); | |
773 | c = getcc(); | |
774 | if (c == erase_char || c == kill_char) | |
775 | break; | |
776 | gomark(c); | |
777 | break; | |
778 | ||
779 | case A_PREFIX: | |
780 | /* | |
781 | * The command is incomplete (more chars are needed). | |
782 | * Display the current char so the user knows | |
783 | * what's going on and get another character. | |
784 | */ | |
785 | if (mca != A_PREFIX) | |
786 | start_mca(A_PREFIX, "& "); | |
787 | if (control_char(c)) | |
788 | { | |
789 | putchr('^'); | |
790 | c = carat_char(c); | |
791 | } | |
792 | putchr(c); | |
793 | c = getcc(); | |
794 | goto again; | |
795 | ||
796 | default: | |
797 | bell(); | |
798 | break; | |
799 | } | |
800 | } | |
801 | } |