1 /* $OpenBSD: keyok.c,v 1.6 2023/10/17 09:52:08 nicm Exp $ */
2
3 /****************************************************************************
4 * Copyright 2019-2020,2021 Thomas E. Dickey *
5 * Copyright 1998-2012,2014 Free Software Foundation, Inc. *
6 * *
7 * Permission is hereby granted, free of charge, to any person obtaining a *
8 * copy of this software and associated documentation files (the *
9 * "Software"), to deal in the Software without restriction, including *
10 * without limitation the rights to use, copy, modify, merge, publish, *
11 * distribute, distribute with modifications, sublicense, and/or sell *
12 * copies of the Software, and to permit persons to whom the Software is *
13 * furnished to do so, subject to the following conditions: *
14 * *
15 * The above copyright notice and this permission notice shall be included *
16 * in all copies or substantial portions of the Software. *
17 * *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
21 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
24 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
25 * *
26 * Except as contained in this notice, the name(s) of the above copyright *
27 * holders shall not be used in advertising or otherwise to promote the *
28 * sale, use or other dealings in this Software without prior written *
29 * authorization. *
30 ****************************************************************************/
31
32 /****************************************************************************
33 * Author: Thomas E. Dickey 1997-on *
34 * and: Juergen Pfeifer 2009 *
35 ****************************************************************************/
36
37 #include <curses.priv.h>
38
39 MODULE_ID("$Id: keyok.c,v 1.6 2023/10/17 09:52:08 nicm Exp $")
40
41 /*
42 * Enable (or disable) ncurses' interpretation of a keycode by adding (or
43 * removing) the corresponding 'tries' entry.
44 *
45 * Do this by storing a second tree of tries, which records the disabled keys.
46 * The simplest way to copy is to make a function that returns the string (with
47 * nulls set to 0200), then use that to reinsert the string into the
48 * corresponding tree.
49 */
50
NCURSES_EXPORT(int)51 NCURSES_EXPORT(int)
52 NCURSES_SP_NAME(keyok) (NCURSES_SP_DCLx int c, bool flag)
53 {
54 int code = ERR;
55
56 if (HasTerminal(SP_PARM)) {
57 T((T_CALLED("keyok(%p, %d,%d)"), (void *) SP_PARM, c, flag));
58 #ifdef USE_TERM_DRIVER
59 code = CallDriver_2(sp, td_kyOk, c, flag);
60 #else
61 if (c >= 0) {
62 int count = 0;
63 char *s;
64 unsigned ch = (unsigned) c;
65
66 if (flag) {
67 while ((s = _nc_expand_try(SP_PARM->_key_ok,
68 ch, &count, (size_t) 0)) != 0) {
69 if (_nc_remove_key(&(SP_PARM->_key_ok), ch)) {
70 code = _nc_add_to_try(&(SP_PARM->_keytry), s, ch);
71 free(s);
72 count = 0;
73 if (code != OK)
74 break;
75 } else {
76 free(s);
77 }
78 }
79 } else {
80 while ((s = _nc_expand_try(SP_PARM->_keytry,
81 ch, &count, (size_t) 0)) != 0) {
82 if (_nc_remove_key(&(SP_PARM->_keytry), ch)) {
83 code = _nc_add_to_try(&(SP_PARM->_key_ok), s, ch);
84 free(s);
85 count = 0;
86 if (code != OK)
87 break;
88 } else {
89 free(s);
90 }
91 }
92 }
93 }
94 #endif
95 }
96 returnCode(code);
97 }
98
99 #if NCURSES_SP_FUNCS
100 NCURSES_EXPORT(int)
keyok(int c,bool flag)101 keyok(int c, bool flag)
102 {
103 return NCURSES_SP_NAME(keyok) (CURRENT_SCREEN, c, flag);
104 }
105 #endif
106