/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1988 AT&T */
/*        All Rights Reserved   */

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

/*LINTLIBRARY*/

#include        <stdlib.h>
#include        <sys/types.h>
#include        "curses_inc.h"

/* This routine deletes a _window and releases it back to the system. */

int
delwin(WINDOW *win)
{
        int             i;
        WINDOW          *par;

        /* If we have children don't delte the window. */
        if (win->_ndescs > 0)
                return (ERR);

        /*
         * If window is a pad, delete the padwin associated with it.
         * NOTE: We shouldn't care that the recursive call will decrement
         * ndescs for this window, since the window will be deleted anyhow.
         */

        if (win->_padwin) {
                win->_padwin->_maxy = win->_maxy;
                (void) delwin(win->_padwin);
        }
        if (win->_parent == NULL) {
                /* Delete all the memory associated with this window. */
                for (i = win->_maxy; i-- > 0; ) {
                        free((char *)win->_y[i]);
#ifdef  _VR3_COMPAT_CODE
                        if (_y16update)
                                free((char *)win->_y16[i]);
#endif  /* _VR3_COMPAT_CODE */
                }
        } else {
        /*
         * We are a subwin and we don't want to delete the memory since
         * it's shared by other windows.  We do want to decrement the
         * descendant count so that if there are no children left to a
         * particular window winsdelln.c will run in fast mode (look there).
         */
                for (par = win->_parent; par != NULL; par = par->_parent)
                        par->_ndescs--;
        }

#ifdef  _VR3_COMPAT_CODE
        if (_y16update)
                free((char *)win->_y16);
#endif  /* _VR3_COMPAT_CODE */

        free((char *)win->_y);
        free((char *)win->_firstch);
        free((char *)win);
        return (OK);
}