/****************************************************************************
 * Copyright 2020-2023,2024 Thomas E. Dickey                                *
 * Copyright 2007-2008,2017 Free Software Foundation, Inc.                  *
 *                                                                          *
 * Copyright (c) 2026                                                       *
 * Project Tick. All rights reserved.                                       *
 *                                                                          *
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 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
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 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/*
**	lib_key_name.c
**
**	The routine key_name().
**
*/

#include <curses.priv.h>

MODULE_ID("$Id: lib_key_name.c,v 1.7 2024/07/27 19:23:59 tom Exp $")

#define MyData _nc_globals.key_name

NCURSES_EXPORT(NCURSES_CONST char *)
key_name(wchar_t c)
{
    cchar_t my_cchar;
    const wchar_t *my_wchars;
    size_t len;
    NCURSES_CONST char *result = NULL;

    memset(&my_cchar, 0, sizeof(my_cchar));
    my_cchar.chars[0] = c;
    my_cchar.chars[1] = L'\0';

    my_wchars = wunctrl(&my_cchar);
    /*
     * wunctrl() could return a wide character rather than just a "printable"
     * representation.  Check for that and return a corresponding multibyte
     * character string.
     */
    len = wcstombs(MyData, my_wchars, sizeof(MyData) - 1);
    if (!isEILSEQ(len) && (len != 0) && (len <= MB_LEN_MAX)) {
	MyData[len] = '\0';
	result = MyData;
    }
    return result;
}
