netsurf/riscos/wimputils.h
John Mark Bell c097ddf59e Permit aliasing of pointers to wimp_window_state and wimp_open.
svn path=/trunk/netsurf/; revision=6944
2009-03-27 17:49:25 +00:00

39 lines
1.2 KiB
C

/*
* Copyright 2009 John-Mark Bell <jmb@netsurf-browser.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* A collection of grubby utilities for working with OSLib's wimp API.
*/
#ifndef riscos_wimputils_h_
#define riscos_wimputils_h_
#include <oslib/wimp.h>
/* Magical union for working around strict aliasing
* Do not use this directly. Use the macros, instead. */
typedef union window_open_state {
wimp_window_state state;
wimp_open open;
} window_open_state;
/* Convert a pointer to a wimp_window_state into a pointer to a wimp_open */
#define PTR_WIMP_OPEN(pstate) ((wimp_open *) (window_open_state *) (pstate))
#endif