/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*  Copyright (c) 1988 AT&T */
/*    All Rights Reserved   */


/*
 *      Copyright (c) 1997, by Sun Microsystems, Inc.
 *      All rights reserved.
 */

/*LINTLIBRARY*/

#include        <sys/types.h>
#include        "curses_inc.h"

/*
 * Copy n chars(wchar_t) in window win from current cursor position to end
 * of window into char buffer str.  Return the number of chars copied.
 */

int
winnwstr(WINDOW *win, wchar_t *wstr, int ncols)
{
        int     counter = 0;
        int     cy = win->_cury;
        chtype  *ptr = &(win->_y[cy][win->_curx]),
                *pmax = &(win->_y[cy][win->_maxx]);
        wchar_t wc, *cp;
        int     scrw, s;
        char    cbuf[CSMAX+1];


        while (ISCBIT(*ptr))
                ptr--;

        if (ncols < -1)
                ncols = MAXINT;

        while (counter < ncols) {
                wc = RBYTE(*ptr);
                scrw = mbscrw((int) wc);
                (void) mbeucw((int) wc);
                /* LINTED */
                cp = (wchar_t *)cbuf;
                for (s = 0; s < scrw; s++, ptr++) {
                        if ((wc = RBYTE(*ptr)) == MBIT)
                                continue;
                        *cp++ = wc;
                        if ((wc = LBYTE(*ptr) | MBIT) == MBIT)
                                continue;
                        *cp++ = wc;
                }
                *cp = (char)0;

                if (_curs_mbtowc(&wc, cbuf, CSMAX) <= 0)
                        break;

                *wstr++ = wc;
                counter++;

                if (ptr >= pmax) {
                        if (++cy == win->_maxy)
                                break;

                        ptr = &(win->_y[cy][0]);
                        pmax = ptr + win->_maxx;
                }
        }
        if (counter < ncols)
                *wstr = (wchar_t)0;

        return (counter);
}