1 /****************************************************************************
2 * Copyright 2020 Thomas E. Dickey *
3 * Copyright 2003-2006,2009 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, 2003 *
32 ****************************************************************************/
33
34 #include <curses.priv.h>
35
36 MODULE_ID("$Id: key_defined.c,v 1.10 2020/02/02 23:34:34 tom Exp $")
37
38 static int
find_definition(TRIES * tree,const char * str)39 find_definition(TRIES * tree, const char *str)
40 {
41 TRIES *ptr;
42 int result = OK;
43
44 if (str != 0 && *str != '\0') {
45 for (ptr = tree; ptr != 0; ptr = ptr->sibling) {
46 if (UChar(*str) == UChar(ptr->ch)) {
47 if (str[1] == '\0' && ptr->child != 0) {
48 result = ERR;
49 } else if ((result = find_definition(ptr->child, str + 1))
50 == OK) {
51 result = ptr->value;
52 } else if (str[1] == '\0') {
53 result = ERR;
54 }
55 }
56 if (result != OK)
57 break;
58 }
59 }
60 return (result);
61 }
62
63 /*
64 * Returns the keycode associated with the given string. If none is found,
65 * return OK. If the string is only a prefix to other strings, return ERR.
66 * Otherwise, return the keycode's value (neither OK/ERR).
67 */
68 NCURSES_EXPORT(int)
NCURSES_SP_NAME(key_defined)69 NCURSES_SP_NAME(key_defined) (NCURSES_SP_DCLx const char *str)
70 {
71 int code = ERR;
72
73 T((T_CALLED("key_defined(%p, %s)"), (void *) SP_PARM, _nc_visbuf(str)));
74 if (SP_PARM != 0 && str != 0) {
75 code = find_definition(SP_PARM->_keytry, str);
76 }
77
78 returnCode(code);
79 }
80
81 #if NCURSES_SP_FUNCS
82 NCURSES_EXPORT(int)
key_defined(const char * str)83 key_defined(const char *str)
84 {
85 return NCURSES_SP_NAME(key_defined) (CURRENT_SCREEN, str);
86 }
87 #endif
88