/*
 * Copyright (c) 1981 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)scroll.c	5.3 (Berkeley) 6/30/88";
#endif /* not lint */

# include	"curses.ext"

/*
 *	This routine scrolls the window up a line.
 *
 */
int scroll(win)
register  WINDOW	*win;
{
	register int	oy, ox;

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

	if (!win->_scroll)
		return ERR;

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

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