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28
29/*
30**	Support functions for wide/narrow conversion.
31*/
32
33#include <curses.priv.h>
34
35MODULE_ID("$Id: charable.c,v 1.5 2008/07/05 20:51:41 tom Exp $")
36
37NCURSES_EXPORT(bool) _nc_is_charable(wchar_t ch)
38{
39    bool result;
40#if HAVE_WCTOB
41    result = (wctob((wint_t) ch) == (int) ch);
42#else
43    result = (_nc_to_char(ch) >= 0);
44#endif
45    return result;
46}
47
48NCURSES_EXPORT(int) _nc_to_char(wint_t ch)
49{
50    int result;
51#if HAVE_WCTOB
52    result = wctob(ch);
53#elif HAVE_WCTOMB
54    char temp[MB_LEN_MAX];
55    result = wctomb(temp, ch);
56    if (strlen(temp) == 1)
57	result = UChar(temp[0]);
58    else
59	result = -1;
60#endif
61    return result;
62}
63
64NCURSES_EXPORT(wint_t) _nc_to_widechar(int ch)
65{
66    wint_t result;
67#if HAVE_BTOWC
68    result = btowc(ch);
69#elif HAVE_MBTOWC
70    wchar_t convert;
71    char temp[2];
72    temp[0] = ch;
73    temp[1] = '\0';
74    if (mbtowc(&convert, temp, 1) >= 0)
75	result = convert;
76    else
77	result = WEOF;
78#endif
79    return result;
80}
81