usr/src/lib/libcurses/delwin.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[] = "@(#)delwin.c    8.2 (Berkeley) %G%";
#endif  /* not lint */

#include <stdlib.h>

#include "curses.h"

/*
 * delwin --
 *      Delete a window and release it back to the system.
 */
int
delwin(win)
        register WINDOW *win;
{

        register WINDOW *wp, *np;

        if (win->orig == NULL) {
                /*
                 * If we are the original window, delete the space for all
                 * the subwindows, the line space and the window space.
                 */
                free(win->lspace);
                free(win->wspace);
                free(win->lines);
                wp = win->nextp;
                while (wp != win) {
                        np = wp->nextp;
                        delwin(wp);
                        wp = np;
                }
        } else {
                /*
                 * If we are a subwindow, take ourselves out of the list.
                 * NOTE: if we are a subwindow, the minimum list is orig
                 * followed by this subwindow, so there are always at least
                 * two windows in the list.
                 */
                for (wp = win->nextp; wp->nextp != win; wp = wp->nextp)
                        continue;
                wp->nextp = win->nextp;
        }
        free(win);
        return (OK);
}