/*
 * Copyright 2001 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
/*        All Rights Reserved   */

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

/*LINTLIBRARY*/

#ifndef lint
static char
sccsid[] = "@(#)scroll.c 1.6 88/02/08 SMI"; /* from UCB 5.1 85/06/07 */
#endif /* not lint */

#include        "curses.ext"

/*
 *      This routine scrolls the window up a line.
 */

int
scroll(WINDOW *win)
{
        int     oy, ox;

#ifdef DEBUG
        fprintf(outf, "SCROLL(%0.2o)\n", win);
#endif

        if (!win->_scroll)
                return (ERR);

        getyx(win, oy, ox);
        (void) wmove(win, 0, 0);
        (void) wdeleteln(win);
        (void) wmove(win, oy, ox);

        if (win == curscr) {
                (void) _putchar('\n');
                if (!NONL)
                        win->_curx = 0;
#ifdef DEBUG
                fprintf(outf, "SCROLL: win == curscr\n");
#endif
        }

        return (OK);
}