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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 | * | |
6 | * This code is derived from software contributed to Berkeley by | |
7 | * Mark Nudleman. | |
8 | * | |
9 | * Redistribution and use in source and binary forms are permitted | |
10 | * provided that the above copyright notice and this paragraph are | |
11 | * duplicated in all such forms and that any documentation, | |
12 | * advertising materials, and other materials related to such | |
13 | * distribution and use acknowledge that the software was developed | |
14 | * by the University of California, Berkeley. The name of the | |
15 | * University may not be used to endorse or promote products derived | |
16 | * from this software without specific prior written permission. | |
17 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
18 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
19 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
20 | */ | |
21 | ||
22 | #ifndef lint | |
fc132a88 | 23 | static char sccsid[] = "@(#)command.c 5.2 (Berkeley) %G%"; |
bfe13c81 KB |
24 | #endif /* not lint */ |
25 | ||
26 | /* | |
27 | * User-level command processor. | |
28 | */ | |
29 | ||
30 | #include "less.h" | |
31 | #include "position.h" | |
32 | #include "cmd.h" | |
33 | ||
34 | #define NO_MCA 0 | |
35 | #define MCA_DONE 1 | |
36 | #define MCA_MORE 2 | |
37 | ||
38 | extern int erase_char, kill_char; | |
39 | extern int ispipe; | |
40 | extern int sigs; | |
41 | extern int quit_at_eof; | |
42 | extern int hit_eof; | |
43 | extern int sc_width; | |
44 | extern int sc_height; | |
45 | extern int sc_window; | |
46 | extern int curr_ac; | |
47 | extern int ac; | |
48 | extern int quitting; | |
49 | extern int scroll; | |
50 | extern char *first_cmd; | |
51 | extern char *every_first_cmd; | |
52 | extern char version[]; | |
53 | extern char *current_file; | |
54 | #if EDITOR | |
55 | extern char *editor; | |
56 | #endif | |
57 | extern int screen_trashed; /* The screen has been overwritten */ | |
58 | ||
59 | static char cmdbuf[120]; /* Buffer for holding a multi-char command */ | |
bfe13c81 KB |
60 | static char *cp; /* Pointer into cmdbuf */ |
61 | static int cmd_col; /* Current column of the multi-char command */ | |
62 | static int mca; /* The multicharacter command (action) */ | |
63 | static int last_mca; /* The previous mca */ | |
64 | static int number; /* The number typed by the user */ | |
65 | static int wsearch; /* Search for matches (1) or non-matches (0) */ | |
66 | ||
67 | /* | |
68 | * Reset command buffer (to empty). | |
69 | */ | |
70 | cmd_reset() | |
71 | { | |
72 | cp = cmdbuf; | |
73 | } | |
74 | ||
75 | /* | |
76 | * Backspace in command buffer. | |
77 | */ | |
78 | static int | |
79 | cmd_erase() | |
80 | { | |
81 | if (cp == cmdbuf) | |
82 | /* | |
83 | * Backspace past beginning of the string: | |
84 | * this usually means abort the command. | |
85 | */ | |
86 | return (1); | |
87 | ||
88 | if (control_char(*--cp)) | |
89 | { | |
90 | /* | |
91 | * Erase an extra character, for the carat. | |
92 | */ | |
93 | backspace(); | |
94 | cmd_col--; | |
95 | } | |
96 | backspace(); | |
97 | cmd_col--; | |
98 | return (0); | |
99 | } | |
100 | ||
101 | /* | |
102 | * Set up the display to start a new multi-character command. | |
103 | */ | |
104 | start_mca(action, prompt) | |
105 | int action; | |
106 | char *prompt; | |
107 | { | |
108 | lower_left(); | |
109 | clear_eol(); | |
110 | putstr(prompt); | |
111 | cmd_col = strlen(prompt); | |
112 | mca = action; | |
113 | } | |
114 | ||
115 | /* | |
116 | * Process a single character of a multi-character command, such as | |
117 | * a number, or the pattern of a search command. | |
118 | */ | |
119 | static int | |
120 | cmd_char(c) | |
121 | int c; | |
122 | { | |
123 | if (c == erase_char) | |
124 | { | |
125 | if (cmd_erase()) | |
126 | return (1); | |
127 | } else if (c == kill_char) | |
128 | { | |
129 | /* {{ Could do this faster, but who cares? }} */ | |
130 | while (cmd_erase() == 0) | |
131 | ; | |
132 | } else if (cp >= &cmdbuf[sizeof(cmdbuf)-1]) | |
133 | { | |
134 | /* | |
135 | * No room in the command buffer. | |
136 | */ | |
137 | bell(); | |
138 | } else if (cmd_col >= sc_width-3) | |
139 | { | |
140 | /* | |
141 | * No room on the screen. | |
142 | * {{ Could get fancy here; maybe shift the displayed | |
143 | * line and make room for more chars, like ksh. }} | |
144 | */ | |
145 | bell(); | |
146 | } else | |
147 | { | |
148 | /* | |
149 | * Append the character to the string. | |
150 | */ | |
151 | *cp++ = c; | |
152 | if (control_char(c)) | |
153 | { | |
154 | putchr('^'); | |
155 | cmd_col++; | |
156 | c = carat_char(c); | |
157 | } | |
158 | putchr(c); | |
159 | cmd_col++; | |
160 | } | |
161 | return (0); | |
162 | } | |
163 | ||
164 | /* | |
165 | * Return the number currently in the command buffer. | |
166 | */ | |
167 | static int | |
168 | cmd_int() | |
169 | { | |
170 | *cp = '\0'; | |
171 | cp = cmdbuf; | |
172 | return (atoi(cmdbuf)); | |
173 | } | |
174 | ||
175 | /* | |
176 | * Move the cursor to lower left before executing a command. | |
177 | * This looks nicer if the command takes a long time before | |
178 | * updating the screen. | |
179 | */ | |
180 | static void | |
181 | cmd_exec() | |
182 | { | |
183 | lower_left(); | |
184 | flush(); | |
185 | } | |
186 | ||
187 | /* | |
188 | * Display the appropriate prompt. | |
189 | */ | |
190 | static void | |
191 | prompt() | |
192 | { | |
193 | register char *p; | |
194 | ||
195 | if (first_cmd != NULL && *first_cmd != '\0') | |
196 | { | |
197 | /* | |
198 | * No prompt necessary if commands are from first_cmd | |
199 | * rather than from the user. | |
200 | */ | |
201 | return; | |
202 | } | |
203 | ||
204 | /* | |
205 | * If nothing is displayed yet, display starting from line 1. | |
206 | */ | |
207 | if (position(TOP) == NULL_POSITION) | |
208 | jump_back(1); | |
209 | else if (screen_trashed) | |
210 | repaint(); | |
211 | ||
212 | /* | |
213 | * If the -E flag is set and we've hit EOF on the last file, quit. | |
214 | */ | |
215 | if (quit_at_eof == 2 && hit_eof && curr_ac + 1 >= ac) | |
216 | quit(); | |
217 | ||
218 | /* | |
219 | * Select the proper prompt and display it. | |
220 | */ | |
221 | lower_left(); | |
222 | clear_eol(); | |
223 | p = pr_string(); | |
224 | if (p == NULL) | |
225 | putchr(':'); | |
226 | else | |
227 | { | |
228 | so_enter(); | |
229 | putstr(p); | |
230 | so_exit(); | |
231 | } | |
232 | } | |
233 | ||
234 | /* | |
235 | * Get command character. | |
236 | * The character normally comes from the keyboard, | |
237 | * but may come from the "first_cmd" string. | |
238 | */ | |
239 | static int | |
240 | getcc() | |
241 | { | |
242 | if (first_cmd == NULL) | |
243 | return (getchr()); | |
244 | ||
245 | if (*first_cmd == '\0') | |
246 | { | |
247 | /* | |
248 | * Reached end of first_cmd input. | |
249 | */ | |
250 | first_cmd = NULL; | |
251 | if (cp > cmdbuf && position(TOP) == NULL_POSITION) | |
252 | { | |
253 | /* | |
254 | * Command is incomplete, so try to complete it. | |
255 | * There are only two cases: | |
256 | * 1. We have "/string" but no newline. Add the \n. | |
257 | * 2. We have a number but no command. Treat as #g. | |
258 | * (This is all pretty hokey.) | |
259 | */ | |
260 | if (mca != A_DIGIT) | |
261 | /* Not a number; must be search string */ | |
262 | return ('\n'); | |
263 | else | |
264 | /* A number; append a 'g' */ | |
265 | return ('g'); | |
266 | } | |
267 | return (getchr()); | |
268 | } | |
269 | return (*first_cmd++); | |
270 | } | |
271 | ||
272 | /* | |
273 | * Execute a multicharacter command. | |
274 | */ | |
275 | static void | |
276 | exec_mca() | |
277 | { | |
278 | register char *p; | |
279 | register int n; | |
280 | ||
281 | *cp = '\0'; | |
282 | cmd_exec(); | |
283 | switch (mca) | |
284 | { | |
285 | case A_F_SEARCH: | |
286 | search(1, cmdbuf, number, wsearch); | |
287 | break; | |
288 | case A_B_SEARCH: | |
289 | search(0, cmdbuf, number, wsearch); | |
290 | break; | |
291 | case A_FIRSTCMD: | |
292 | /* | |
293 | * Skip leading spaces or + signs in the string. | |
294 | */ | |
295 | for (p = cmdbuf; *p == '+' || *p == ' '; p++) | |
296 | ; | |
297 | if (every_first_cmd != NULL) | |
298 | free(every_first_cmd); | |
299 | if (*p == '\0') | |
300 | every_first_cmd = NULL; | |
301 | else | |
302 | every_first_cmd = save(p); | |
303 | break; | |
304 | case A_TOGGLE_OPTION: | |
305 | toggle_option(cmdbuf, 1); | |
306 | break; | |
307 | case A_EXAMINE: | |
308 | /* | |
309 | * Ignore leading spaces in the filename. | |
310 | */ | |
311 | for (p = cmdbuf; *p == ' '; p++) | |
312 | ; | |
313 | edit(glob(p)); | |
314 | break; | |
bfe13c81 KB |
315 | } |
316 | } | |
317 | ||
318 | /* | |
319 | * Add a character to a multi-character command. | |
320 | */ | |
321 | static int | |
322 | mca_char(c) | |
323 | int c; | |
324 | { | |
325 | switch (mca) | |
326 | { | |
327 | case 0: | |
328 | /* | |
329 | * Not in a multicharacter command. | |
330 | */ | |
331 | return (NO_MCA); | |
332 | ||
333 | case A_PREFIX: | |
334 | /* | |
335 | * In the prefix of a command. | |
336 | */ | |
337 | return (NO_MCA); | |
338 | ||
339 | case A_DIGIT: | |
340 | /* | |
341 | * Entering digits of a number. | |
342 | * Terminated by a non-digit. | |
343 | */ | |
344 | if ((c < '0' || c > '9') && | |
345 | c != erase_char && c != kill_char) | |
346 | { | |
347 | /* | |
348 | * Not part of the number. | |
349 | * Treat as a normal command character. | |
350 | */ | |
351 | number = cmd_int(); | |
352 | mca = 0; | |
353 | return (NO_MCA); | |
354 | } | |
355 | break; | |
356 | ||
357 | case A_TOGGLE_OPTION: | |
358 | /* | |
359 | * Special case for the TOGGLE_OPTION command. | |
360 | * if the option letter which was entered is a | |
361 | * single-char option, execute the command immediately, | |
362 | * so he doesn't have to hit RETURN. | |
363 | */ | |
364 | if (cp == cmdbuf && c != erase_char && c != kill_char && | |
365 | single_char_option(c)) | |
366 | { | |
367 | cmdbuf[0] = c; | |
368 | cmdbuf[1] = '\0'; | |
369 | toggle_option(cmdbuf, 1); | |
370 | return (MCA_DONE); | |
371 | } | |
372 | break; | |
373 | } | |
374 | ||
375 | /* | |
376 | * Any other multicharacter command | |
377 | * is terminated by a newline. | |
378 | */ | |
379 | if (c == '\n' || c == '\r') | |
380 | { | |
381 | /* | |
382 | * Execute the command. | |
383 | */ | |
384 | exec_mca(); | |
385 | return (MCA_DONE); | |
386 | } | |
387 | /* | |
388 | * Append the char to the command buffer. | |
389 | */ | |
390 | if (cmd_char(c)) | |
391 | /* | |
392 | * Abort the multi-char command. | |
393 | */ | |
394 | return (MCA_DONE); | |
395 | /* | |
396 | * Need another character. | |
397 | */ | |
398 | return (MCA_MORE); | |
399 | } | |
400 | ||
401 | /* | |
402 | * Main command processor. | |
403 | * Accept and execute commands until a quit command, then return. | |
404 | */ | |
405 | public void | |
406 | commands() | |
407 | { | |
408 | register int c; | |
409 | register int action; | |
410 | ||
411 | last_mca = 0; | |
412 | scroll = (sc_height + 1) / 2; | |
413 | ||
414 | for (;;) | |
415 | { | |
416 | mca = 0; | |
417 | number = 0; | |
418 | ||
419 | /* | |
420 | * See if any signals need processing. | |
421 | */ | |
422 | if (sigs) | |
423 | { | |
424 | psignals(); | |
425 | if (quitting) | |
426 | quit(); | |
427 | } | |
428 | ||
429 | /* | |
430 | * Display prompt and accept a character. | |
431 | */ | |
432 | cmd_reset(); | |
433 | prompt(); | |
434 | noprefix(); | |
435 | c = getcc(); | |
436 | ||
437 | again: | |
438 | if (sigs) | |
439 | continue; | |
440 | ||
441 | /* | |
442 | * If we are in a multicharacter command, call mca_char. | |
443 | * Otherwise we call cmd_decode to determine the | |
444 | * action to be performed. | |
445 | */ | |
446 | if (mca) | |
447 | switch (mca_char(c)) | |
448 | { | |
449 | case MCA_MORE: | |
450 | /* | |
451 | * Need another character. | |
452 | */ | |
453 | c = getcc(); | |
454 | goto again; | |
455 | case MCA_DONE: | |
456 | /* | |
457 | * Command has been handled by mca_char. | |
458 | * Start clean with a prompt. | |
459 | */ | |
460 | continue; | |
461 | case NO_MCA: | |
462 | /* | |
463 | * Not a multi-char command | |
464 | * (at least, not anymore). | |
465 | */ | |
466 | break; | |
467 | } | |
468 | ||
469 | /* | |
470 | * Decode the command character and decide what to do. | |
471 | */ | |
472 | switch (action = cmd_decode(c)) | |
473 | { | |
474 | case A_DIGIT: | |
475 | /* | |
476 | * First digit of a number. | |
477 | */ | |
478 | start_mca(A_DIGIT, ":"); | |
479 | goto again; | |
480 | ||
481 | case A_F_SCREEN: | |
482 | /* | |
483 | * Forward one screen. | |
484 | */ | |
485 | if (number <= 0) | |
486 | number = sc_window; | |
487 | if (number <= 0) | |
488 | number = sc_height - 1; | |
489 | cmd_exec(); | |
490 | forward(number, 1); | |
491 | break; | |
492 | ||
493 | case A_B_SCREEN: | |
494 | /* | |
495 | * Backward one screen. | |
496 | */ | |
497 | if (number <= 0) | |
498 | number = sc_window; | |
499 | if (number <= 0) | |
500 | number = sc_height - 1; | |
501 | cmd_exec(); | |
502 | backward(number, 1); | |
503 | break; | |
504 | ||
505 | case A_F_LINE: | |
506 | /* | |
507 | * Forward N (default 1) line. | |
508 | */ | |
509 | if (number <= 0) | |
510 | number = 1; | |
511 | cmd_exec(); | |
512 | forward(number, 0); | |
513 | break; | |
514 | ||
515 | case A_B_LINE: | |
516 | /* | |
517 | * Backward N (default 1) line. | |
518 | */ | |
519 | if (number <= 0) | |
520 | number = 1; | |
521 | cmd_exec(); | |
522 | backward(number, 0); | |
523 | break; | |
524 | ||
525 | case A_F_SCROLL: | |
526 | /* | |
527 | * Forward N lines | |
528 | * (default same as last 'd' or 'u' command). | |
529 | */ | |
530 | if (number > 0) | |
531 | scroll = number; | |
532 | cmd_exec(); | |
533 | forward(scroll, 0); | |
534 | break; | |
535 | ||
536 | case A_B_SCROLL: | |
537 | /* | |
538 | * Forward N lines | |
539 | * (default same as last 'd' or 'u' command). | |
540 | */ | |
541 | if (number > 0) | |
542 | scroll = number; | |
543 | cmd_exec(); | |
544 | backward(scroll, 0); | |
545 | break; | |
546 | ||
547 | case A_FREPAINT: | |
548 | /* | |
549 | * Flush buffers, then repaint screen. | |
550 | * Don't flush the buffers on a pipe! | |
551 | */ | |
552 | if (!ispipe) | |
553 | { | |
554 | ch_init(0, 0); | |
555 | clr_linenum(); | |
556 | } | |
557 | /* FALLTHRU */ | |
558 | case A_REPAINT: | |
559 | /* | |
560 | * Repaint screen. | |
561 | */ | |
562 | cmd_exec(); | |
563 | repaint(); | |
564 | break; | |
565 | ||
566 | case A_GOLINE: | |
567 | /* | |
568 | * Go to line N, default beginning of file. | |
569 | */ | |
570 | if (number <= 0) | |
571 | number = 1; | |
572 | cmd_exec(); | |
573 | jump_back(number); | |
574 | break; | |
575 | ||
576 | case A_PERCENT: | |
577 | /* | |
578 | * Go to a specified percentage into the file. | |
579 | */ | |
580 | if (number < 0) | |
581 | number = 0; | |
582 | if (number > 100) | |
583 | number = 100; | |
584 | cmd_exec(); | |
585 | jump_percent(number); | |
586 | break; | |
587 | ||
588 | case A_GOEND: | |
589 | /* | |
590 | * Go to line N, default end of file. | |
591 | */ | |
592 | cmd_exec(); | |
593 | if (number <= 0) | |
594 | jump_forw(); | |
595 | else | |
596 | jump_back(number); | |
597 | break; | |
598 | ||
599 | case A_STAT: | |
600 | /* | |
601 | * Print file name, etc. | |
602 | */ | |
603 | cmd_exec(); | |
604 | error(eq_message()); | |
605 | break; | |
606 | ||
607 | case A_VERSION: | |
608 | /* | |
609 | * Print version number, without the "@(#)". | |
610 | */ | |
611 | cmd_exec(); | |
612 | error(version+4); | |
613 | break; | |
614 | ||
615 | case A_QUIT: | |
616 | /* | |
617 | * Exit. | |
618 | */ | |
619 | quit(); | |
620 | ||
621 | case A_F_SEARCH: | |
622 | case A_B_SEARCH: | |
623 | /* | |
624 | * Search for a pattern. | |
625 | * Accept chars of the pattern until \n. | |
626 | */ | |
627 | if (number <= 0) | |
628 | number = 1; | |
629 | start_mca(action, (action==A_F_SEARCH) ? "/" : "?"); | |
630 | last_mca = mca; | |
631 | wsearch = 1; | |
632 | c = getcc(); | |
633 | if (c == '!') | |
634 | { | |
635 | /* | |
636 | * Invert the sense of the search. | |
637 | * Set wsearch to 0 and get a new | |
638 | * character for the start of the pattern. | |
639 | */ | |
640 | start_mca(action, | |
641 | (action==A_F_SEARCH) ? "!/" : "!?"); | |
642 | wsearch = 0; | |
643 | c = getcc(); | |
644 | } | |
645 | goto again; | |
646 | ||
647 | case A_AGAIN_SEARCH: | |
648 | /* | |
649 | * Repeat previous search. | |
650 | */ | |
651 | if (number <= 0) | |
652 | number = 1; | |
653 | if (wsearch) | |
654 | start_mca(last_mca, | |
655 | (last_mca==A_F_SEARCH) ? "/" : "?"); | |
656 | else | |
657 | start_mca(last_mca, | |
658 | (last_mca==A_F_SEARCH) ? "!/" : "!?"); | |
659 | cmd_exec(); | |
660 | search(mca==A_F_SEARCH, (char *)NULL, number, wsearch); | |
661 | break; | |
662 | ||
663 | case A_HELP: | |
664 | /* | |
665 | * Help. | |
666 | */ | |
667 | lower_left(); | |
668 | clear_eol(); | |
669 | putstr("help"); | |
670 | cmd_exec(); | |
671 | help(); | |
672 | break; | |
673 | ||
674 | case A_EXAMINE: | |
675 | /* | |
676 | * Edit a new file. Get the filename. | |
677 | */ | |
678 | cmd_reset(); | |
679 | start_mca(A_EXAMINE, "Examine: "); | |
680 | c = getcc(); | |
681 | goto again; | |
682 | ||
683 | case A_VISUAL: | |
684 | /* | |
685 | * Invoke an editor on the input file. | |
686 | */ | |
687 | #if EDITOR | |
688 | if (ispipe) | |
689 | { | |
690 | error("Cannot edit standard input"); | |
691 | break; | |
692 | } | |
693 | /* | |
694 | * Try to pass the line number to the editor. | |
695 | */ | |
696 | cmd_exec(); | |
697 | c = currline(MIDDLE); | |
698 | if (c == 0) | |
699 | sprintf(cmdbuf, "%s %s", | |
700 | editor, current_file); | |
701 | else | |
702 | sprintf(cmdbuf, "%s +%d %s", | |
703 | editor, c, current_file); | |
704 | lsystem(cmdbuf); | |
705 | ch_init(0, 0); | |
706 | clr_linenum(); | |
707 | break; | |
708 | #else | |
709 | error("Command not available"); | |
710 | break; | |
711 | #endif | |
712 | ||
713 | case A_NEXT_FILE: | |
714 | /* | |
715 | * Examine next file. | |
716 | */ | |
717 | if (number <= 0) | |
718 | number = 1; | |
719 | next_file(number); | |
720 | break; | |
721 | ||
722 | case A_PREV_FILE: | |
723 | /* | |
724 | * Examine previous file. | |
725 | */ | |
726 | if (number <= 0) | |
727 | number = 1; | |
728 | prev_file(number); | |
729 | break; | |
730 | ||
731 | case A_TOGGLE_OPTION: | |
732 | /* | |
733 | * Toggle a flag setting. | |
734 | */ | |
735 | cmd_reset(); | |
736 | start_mca(A_TOGGLE_OPTION, "-"); | |
737 | c = getcc(); | |
738 | goto again; | |
739 | ||
740 | case A_DISP_OPTION: | |
741 | /* | |
742 | * Report a flag setting. | |
743 | */ | |
744 | cmd_reset(); | |
745 | start_mca(A_DISP_OPTION, "_"); | |
746 | c = getcc(); | |
747 | if (c == erase_char || c == kill_char) | |
748 | break; | |
749 | cmdbuf[0] = c; | |
750 | cmdbuf[1] = '\0'; | |
751 | toggle_option(cmdbuf, 0); | |
752 | break; | |
753 | ||
754 | case A_FIRSTCMD: | |
755 | /* | |
756 | * Set an initial command for new files. | |
757 | */ | |
758 | cmd_reset(); | |
759 | start_mca(A_FIRSTCMD, "+"); | |
760 | c = getcc(); | |
761 | goto again; | |
762 | ||
bfe13c81 KB |
763 | case A_SETMARK: |
764 | /* | |
765 | * Set a mark. | |
766 | */ | |
767 | lower_left(); | |
768 | clear_eol(); | |
769 | start_mca(A_SETMARK, "mark: "); | |
770 | c = getcc(); | |
771 | if (c == erase_char || c == kill_char) | |
772 | break; | |
773 | setmark(c); | |
774 | break; | |
775 | ||
776 | case A_GOMARK: | |
777 | /* | |
778 | * Go to a mark. | |
779 | */ | |
780 | lower_left(); | |
781 | clear_eol(); | |
782 | start_mca(A_GOMARK, "goto mark: "); | |
783 | c = getcc(); | |
784 | if (c == erase_char || c == kill_char) | |
785 | break; | |
786 | gomark(c); | |
787 | break; | |
788 | ||
789 | case A_PREFIX: | |
790 | /* | |
791 | * The command is incomplete (more chars are needed). | |
792 | * Display the current char so the user knows | |
793 | * what's going on and get another character. | |
794 | */ | |
795 | if (mca != A_PREFIX) | |
796 | start_mca(A_PREFIX, "& "); | |
797 | if (control_char(c)) | |
798 | { | |
799 | putchr('^'); | |
800 | c = carat_char(c); | |
801 | } | |
802 | putchr(c); | |
803 | c = getcc(); | |
804 | goto again; | |
805 | ||
806 | default: | |
807 | bell(); | |
808 | break; | |
809 | } | |
810 | } | |
811 | } |