/*
 * 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"

/*
 * 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
winwchnstr(WINDOW *win, chtype *string, int ncols)
{
        chtype  *ptr = &(win->_y[win->_cury][win->_curx]);
        int     counter = 0;
        int     maxcols = win->_maxx - win->_curx;
        int     scrw, s, wc;
        char    *mp, mbbuf[CSMAX+1];
        wchar_t wch;
        chtype  rawc;
        chtype  attr;

        if (ncols < 0)
                ncols = MAXINT;

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

        while ((counter < ncols) && maxcols > 0) {
                attr = *ptr & A_WATTRIBUTES;
                rawc = *ptr & A_WCHARTEXT;
                (void) mbeucw((int)RBYTE(rawc));
                scrw = mbscrw((int)RBYTE(rawc));
                for (mp = mbbuf, s = 0; s < scrw; s++, maxcols--, ptr++) {
                        if ((wc = (int)RBYTE(rawc)) == MBIT)
                                continue;
                        /* LINTED */
                        *mp++ = (char) wc;
                        if ((wc = (int)(LBYTE(rawc) | MBIT)) == MBIT)
                                continue;
                        /* LINTED */
                        *mp++ = (char) wc;
                }
                *mp = '\0';
                if (_curs_mbtowc(&wch, mbbuf, CSMAX) <= 0)
                        break;
                *string++ = wch | attr;
                counter++;
        }
        if (counter < ncols)
                *string = (chtype) 0;
        return (counter);
}