usr/src/lib/libcurses/deleteln.c

/*
 * Copyright (c) 1981, 1993, 1994
 *      The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)deleteln.c  8.2 (Berkeley) %G%";
#endif  /* not lint */

#include <string.h>

#include "curses.h"

/*
 * wdeleteln --
 *      Delete a line from the screen.  It leaves (cury, curx) unchanged.
 */
int
wdeleteln(win)
        register WINDOW *win;
{
        register int y, i;
        register __LINE *temp;

#ifdef DEBUG
        __CTRACE("deleteln: (%0.2o)\n", win);
#endif
        temp = win->lines[win->cury];
        for (y = win->cury; y < win->maxy - 1; y++) {
                win->lines[y]->flags &= ~__ISPASTEOL;
                win->lines[y + 1]->flags &= ~__ISPASTEOL;
                if (win->orig == NULL)
                        win->lines[y] = win->lines[y + 1];
                else
                        (void) memcpy(win->lines[y]->line,
                            win->lines[y + 1]->line,
                            win->maxx * __LDATASIZE);
                __touchline(win, y, 0, win->maxx - 1, 0);
        }

        if (win->orig == NULL)
                win->lines[y] = temp;
        else
                temp = win->lines[y];

        for(i = 0; i < win->maxx; i++) {
                temp->line[i].ch = ' ';
                temp->line[i].attr = 0;
        }
        __touchline(win, y, 0, win->maxx - 1, 0);
        if (win->orig == NULL)
                __id_subwins(win);
        return (OK);
}