1 /****************************************************************************
2 * Copyright 2020,2023 Thomas E. Dickey *
3 * Copyright 2007-2008,2017 Free Software Foundation, Inc. *
4 * *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
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10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
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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 *
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28 ****************************************************************************/
29
30 /*
31 ** lib_key_name.c
32 **
33 ** The routine key_name().
34 **
35 */
36
37 #include <curses.priv.h>
38
39 MODULE_ID("$Id: lib_key_name.c,v 1.6 2023/06/03 12:15:34 tom Exp $")
40
41 #define MyData _nc_globals.key_name
42
NCURSES_EXPORT(NCURSES_CONST char *)43 NCURSES_EXPORT(NCURSES_CONST char *)
44 key_name(wchar_t c)
45 {
46 cchar_t my_cchar;
47 wchar_t *my_wchars;
48 size_t len;
49 NCURSES_CONST char *result = NULL;
50
51 memset(&my_cchar, 0, sizeof(my_cchar));
52 my_cchar.chars[0] = c;
53 my_cchar.chars[1] = L'\0';
54
55 my_wchars = wunctrl(&my_cchar);
56 /*
57 * wunctrl() could return a wide character rather than just a "printable"
58 * representation. Check for that and return a corresponding multibyte
59 * character string.
60 */
61 len = wcstombs(MyData, my_wchars, sizeof(MyData) - 1);
62 if (!isEILSEQ(len) && (len != 0) && (len <= MB_LEN_MAX)) {
63 MyData[len] = '\0';
64 result = MyData;
65 }
66 return result;
67 }
68