1 /* $OpenBSD: charable.c,v 1.2 2023/10/17 09:52:09 nicm Exp $ */
2
3 /****************************************************************************
4 * Copyright 2018,2020 Thomas E. Dickey *
5 * Copyright 2003-2005,2008 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. *
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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 ** Support functions for wide/narrow conversion.
34 */
35
36 #include <curses.priv.h>
37
38 MODULE_ID("$Id: charable.c,v 1.2 2023/10/17 09:52:09 nicm Exp $")
39
NCURSES_EXPORT(bool)40 NCURSES_EXPORT(bool) _nc_is_charable(wchar_t ch)
41 {
42 bool result;
43 #if HAVE_WCTOB
44 result = (wctob((wint_t) ch) == (int) ch);
45 #else
46 result = (_nc_to_char(ch) >= 0);
47 #endif
48 return result;
49 }
50
_nc_to_char(wint_t ch)51 NCURSES_EXPORT(int) _nc_to_char(wint_t ch)
52 {
53 int result;
54 #if HAVE_WCTOB
55 result = wctob(ch);
56 #elif HAVE_WCTOMB
57 char temp[MB_LEN_MAX];
58 result = wctomb(temp, ch);
59 if (strlen(temp) == 1)
60 result = UChar(temp[0]);
61 else
62 result = -1;
63 #else
64 #error expected either wctob/wctomb
65 #endif
66 return result;
67 }
68
_nc_to_widechar(int ch)69 NCURSES_EXPORT(wint_t) _nc_to_widechar(int ch)
70 {
71 wint_t result;
72 #if HAVE_BTOWC
73 result = btowc(ch);
74 #elif HAVE_MBTOWC
75 wchar_t convert;
76 char temp[2];
77 temp[0] = ch;
78 temp[1] = '\0';
79 if (mbtowc(&convert, temp, 1) >= 0)
80 result = convert;
81 else
82 result = WEOF;
83 #else
84 #error expected either btowc/mbtowc
85 #endif
86 return result;
87 }
88