1/****************************************************************************
2 * Copyright (c) 1998-2000,2006 Free Software Foundation, Inc.              *
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28
29/****************************************************************************
30 *  Author: Thomas E. Dickey            1997-on                             *
31 ****************************************************************************/
32
33#include <curses.priv.h>
34
35MODULE_ID("$Id: keyok.c,v 1.7 2006/12/30 16:22:33 tom Exp $")
36
37/*
38 * Enable (or disable) ncurses' interpretation of a keycode by adding (or
39 * removing) the corresponding 'tries' entry.
40 *
41 * Do this by storing a second tree of tries, which records the disabled keys.
42 * The simplest way to copy is to make a function that returns the string (with
43 * nulls set to 0200), then use that to reinsert the string into the
44 * corresponding tree.
45 */
46
47NCURSES_EXPORT(int)
48keyok(int c, bool flag)
49{
50    int code = ERR;
51    int count = 0;
52    char *s;
53
54    T((T_CALLED("keyok(%d,%d)"), c, flag));
55    if (c >= 0) {
56	unsigned ch = (unsigned) c;
57	if (flag) {
58	    while ((s = _nc_expand_try(SP->_key_ok, ch, &count, 0)) != 0
59		   && _nc_remove_key(&(SP->_key_ok), ch)) {
60		code = _nc_add_to_try(&(SP->_keytry), s, ch);
61		free(s);
62		count = 0;
63		if (code != OK)
64		    break;
65	    }
66	} else {
67	    while ((s = _nc_expand_try(SP->_keytry, ch, &count, 0)) != 0
68		   && _nc_remove_key(&(SP->_keytry), ch)) {
69		code = _nc_add_to_try(&(SP->_key_ok), s, ch);
70		free(s);
71		count = 0;
72		if (code != OK)
73		    break;
74	    }
75	}
76    }
77    returnCode(code);
78}
79