usr/src/lib/libcurses/scroll.c

/*
 * Copyright (c) 1981 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)scroll.c    5.5 (Berkeley) %G%";
#endif /* not lint */

# include       "curses.ext"

/*
 *      This routine scrolls the window up a line.
 *
 */
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');
                if (!NONL)
                        win->_curx = 0;
# ifdef DEBUG
                fprintf(outf, "SCROLL: win == curscr\n");
# endif
        }
}