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

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*/
/*	The copyright notice above does not evidence any   	*/
/*	actual or intended publication of such source code.	*/

/*
 *      Copyright (c) 1997, by Sun Microsystems, Inc.
 *      All rights reserved.
 */

#pragma ident	"@(#)delwin.c	1.7	97/06/25 SMI"	/* SVr4.0 1.6	*/

/*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);
}
