1/****************************************************************************
2 * Copyright 2018,2020 Thomas E. Dickey                                     *
3 * Copyright 2003-2005,2008 Free Software Foundation, Inc.                  *
4 *                                                                          *
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6 * copy of this software and associated documentation files (the            *
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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:                 *
12 *                                                                          *
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14 * in all copies or substantial portions of the Software.                   *
15 *                                                                          *
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27 * authorization.                                                           *
28 ****************************************************************************/
29
30/*
31**	Support functions for wide/narrow conversion.
32*/
33
34#include <curses.priv.h>
35
36MODULE_ID("$Id: charable.c,v 1.8 2020/02/02 23:34:34 tom Exp $")
37
38NCURSES_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
49NCURSES_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];
56    result = wctomb(temp, ch);
57    if (strlen(temp) == 1)
58	result = UChar(temp[0]);
59    else
60	result = -1;
61#else
62#error expected either wctob/wctomb
63#endif
64    return result;
65}
66
67NCURSES_EXPORT(wint_t) _nc_to_widechar(int ch)
68{
69    wint_t result;
70#if HAVE_BTOWC
71    result = btowc(ch);
72#elif HAVE_MBTOWC
73    wchar_t convert;
74    char temp[2];
75    temp[0] = ch;
76    temp[1] = '\0';
77    if (mbtowc(&convert, temp, 1) >= 0)
78	result = convert;
79    else
80	result = WEOF;
81#else
82#error expected either btowc/mbtowc
83#endif
84    return result;
85}
86