/* $OpenBSD: lib_in_wchnstr.c,v 1.2 2023/10/17 09:52:09 nicm Exp $ */

/****************************************************************************
 * Copyright 2020 Thomas E. Dickey                                          *
 * Copyright 2002-2007,2009 Free Software Foundation, Inc.                  *
 *                                                                          *
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 * copy of this software and associated documentation files (the            *
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 * 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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 ****************************************************************************/

/****************************************************************************
 * Author: Thomas Dickey                                                    *
 ****************************************************************************/

/*
**      lib_in_wchnstr.c
**
**      The routine win_wchnstr().
**
*/

#include <curses.priv.h>

MODULE_ID("$Id: lib_in_wchnstr.c,v 1.2 2023/10/17 09:52:09 nicm Exp $")

NCURSES_EXPORT(int)
win_wchnstr(WINDOW *win, cchar_t *wchstr, int n)
{
    int code = OK;

    T((T_CALLED("win_wchnstr(%p,%p,%d)"), (void *) win, (void *) wchstr, n));
    if (win != 0
        && wchstr != 0) {
        NCURSES_CH_T *src;
        int row, col;
        int j, k, limit;

        getyx(win, row, col);
        limit = getmaxx(win) - col;
        src = &(win->_line[row].text[col]);

        if (n < 0) {
            n = limit;
        } else if (n > limit) {
            n = limit;
        }
        for (j = k = 0; j < n; ++j) {
            if (j == 0 || !WidecExt(src[j]) || isWidecBase(src[j])) {
                wchstr[k++] = src[j];
            }
        }
        memset(&(wchstr[k]), 0, sizeof(*wchstr));
        T(("result = %s", _nc_viscbuf(wchstr, n)));
    } else {
        code = ERR;
    }
    returnCode(code);
}