1/****************************************************************************
2 * Copyright 2019,2020 Thomas E. Dickey                                     *
3 * Copyright 1998-2012,2014 Free Software Foundation, Inc.                  *
4 *                                                                          *
5 * Permission is hereby granted, free of charge, to any person obtaining a  *
6 * copy of this software and associated documentation files (the            *
7 * "Software"), to deal in the Software without restriction, including      *
8 * without limitation the rights to use, copy, modify, merge, publish,      *
9 * distribute, distribute with modifications, sublicense, and/or sell       *
10 * copies of the Software, and to permit persons to whom the Software is    *
11 * furnished to do so, subject to the following conditions:                 *
12 *                                                                          *
13 * The above copyright notice and this permission notice shall be included  *
14 * in all copies or substantial portions of the Software.                   *
15 *                                                                          *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
23 *                                                                          *
24 * Except as contained in this notice, the name(s) of the above copyright   *
25 * holders shall not be used in advertising or otherwise to promote the     *
26 * sale, use or other dealings in this Software without prior written       *
27 * authorization.                                                           *
28 ****************************************************************************/
29
30/****************************************************************************
31 *  Author: Thomas E. Dickey                        1997-on                 *
32 *     and: Juergen Pfeifer                         2009                    *
33 ****************************************************************************/
34
35#include <curses.priv.h>
36
37MODULE_ID("$Id: keyok.c,v 1.16 2020/02/02 23:34:34 tom Exp $")
38
39/*
40 * Enable (or disable) ncurses' interpretation of a keycode by adding (or
41 * removing) the corresponding 'tries' entry.
42 *
43 * Do this by storing a second tree of tries, which records the disabled keys.
44 * The simplest way to copy is to make a function that returns the string (with
45 * nulls set to 0200), then use that to reinsert the string into the
46 * corresponding tree.
47 */
48
49NCURSES_EXPORT(int)
50NCURSES_SP_NAME(keyok) (NCURSES_SP_DCLx int c, bool flag)
51{
52    int code = ERR;
53
54    if (HasTerminal(SP_PARM)) {
55	T((T_CALLED("keyok(%p, %d,%d)"), (void *) SP_PARM, c, flag));
56#ifdef USE_TERM_DRIVER
57	code = CallDriver_2(sp, td_kyOk, c, flag);
58#else
59	if (c >= 0) {
60	    int count = 0;
61	    char *s;
62	    unsigned ch = (unsigned) c;
63
64	    if (flag) {
65		while ((s = _nc_expand_try(SP_PARM->_key_ok,
66					   ch, &count, (size_t) 0)) != 0) {
67		    if (_nc_remove_key(&(SP_PARM->_key_ok), ch)) {
68			code = _nc_add_to_try(&(SP_PARM->_keytry), s, ch);
69			free(s);
70			count = 0;
71			if (code != OK)
72			    break;
73		    } else {
74			free(s);
75		    }
76		}
77	    } else {
78		while ((s = _nc_expand_try(SP_PARM->_keytry,
79					   ch, &count, (size_t) 0)) != 0) {
80		    if (_nc_remove_key(&(SP_PARM->_keytry), ch)) {
81			code = _nc_add_to_try(&(SP_PARM->_key_ok), s, ch);
82			free(s);
83			count = 0;
84			if (code != OK)
85			    break;
86		    } else {
87			free(s);
88		    }
89		}
90	    }
91	}
92#endif
93    }
94    returnCode(code);
95}
96
97#if NCURSES_SP_FUNCS
98NCURSES_EXPORT(int)
99keyok(int c, bool flag)
100{
101    return NCURSES_SP_NAME(keyok) (CURRENT_SCREEN, c, flag);
102}
103#endif
104