1 /****************************************************************************
2 * Copyright 2018-2020,2025 Thomas E. Dickey *
3 * Copyright 2003-2005,2008 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, *
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22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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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 *
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27 * authorization. *
28 ****************************************************************************/
29
30 /*
31 ** Support functions for wide/narrow conversion.
32 */
33
34 #include <curses.priv.h>
35
36 MODULE_ID("$Id: charable.c,v 1.9 2025/09/13 10:55:44 tom Exp $")
37
NCURSES_EXPORT(bool)38 NCURSES_EXPORT(bool) _nc_is_charable(wchar_t ch)
39 {
40 bool result;
41 #if HAVE_WCTOB
42 result = (wctob((wint_t) ch) == (int) ch);
43 #else
44 result = (_nc_to_char(ch) >= 0);
45 #endif
46 return result;
47 }
48
_nc_to_char(wint_t ch)49 NCURSES_EXPORT(int) _nc_to_char(wint_t ch)
50 {
51 int result;
52 #if HAVE_WCTOB
53 result = wctob(ch);
54 #elif HAVE_WCTOMB
55 char temp[MB_LEN_MAX + 1];
56 if (wctomb(temp, ch) == 1)
57 result = UChar(temp[0]);
58 else
59 result = -1;
60 #else
61 #error expected either wctob/wctomb
62 #endif
63 return result;
64 }
65
_nc_to_widechar(int ch)66 NCURSES_EXPORT(wint_t) _nc_to_widechar(int ch)
67 {
68 wint_t result;
69 #if HAVE_BTOWC
70 result = btowc(ch);
71 #elif HAVE_MBTOWC
72 wchar_t convert;
73 char temp[2];
74 temp[0] = ch;
75 temp[1] = '\0';
76 if (mbtowc(&convert, temp, 1) >= 0)
77 result = convert;
78 else
79 result = WEOF;
80 #else
81 #error expected either btowc/mbtowc
82 #endif
83 return result;
84 }
85