/*
 * 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 1997 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1988 AT&T */
/*        All Rights Reserved   */

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

/*LINTLIBRARY*/

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

/*
 * Read in ncols worth of data from window win and assign the
 * chars to string. NULL terminate string upon completion.
 * Return the number of chtypes copied.
 */

int
winchnstr(WINDOW *win, chtype *string, int ncols)
{
        chtype  *ptr = &(win->_y[win->_cury][win->_curx]);
        int     counter = 0;
        int     maxcols = win->_maxx - win->_curx;
        int     eucw, scrw, s;
        chtype  rawc, attr, wc;

        if (ncols < 0)
                ncols = MAXINT;

        while (ISCBIT(*ptr)) {
                ptr--;
                maxcols++;
        }

        while ((counter < ncols) && maxcols > 0) {
                eucw = mbeucw((int) RBYTE(*ptr));
                scrw = mbscrw((int) RBYTE(*ptr));

                if (counter + eucw > ncols)
                        break;
                for (s = 0; s < scrw; s++, maxcols--, ptr++) {
                        attr = _ATTR(*ptr);
                        rawc = _CHAR(*ptr);
                        if ((wc = RBYTE(rawc)) == MBIT)
                                continue;
                        *string++ = wc | attr;
                        counter++;
                        if ((wc = LBYTE(rawc) | MBIT) == MBIT)
                                continue;
                        *string++ = wc | attr;
                        counter++;
                }
        }
        if (counter < ncols)
                *string = (chtype) 0;
        return (counter);
}