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/*
* 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 to permit aliasing of wimp_window_state and wimp_open
* 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))
/* Similarly for wimp_message_list */
typedef struct ns_wimp_message_list {
/* Nasty hack to ensure that we have at least one field in the struct */
int first;
int rest[];
} ns_wimp_message_list;
typedef union message_list {
wimp_message_list wimp;
ns_wimp_message_list ns;
} message_list;
#define PTR_WIMP_MESSAGE_LIST(l) ((wimp_message_list *) (message_list *) (l))
/* Also for VDU variable lists */
typedef struct ns_os_vdu_var_list {
os_vdu_var first;
os_vdu_var rest[];
} ns_os_vdu_var_list;
typedef union vdu_var_list {
os_vdu_var_list os;
ns_os_vdu_var_list ns;
} vdu_var_list;
#define PTR_OS_VDU_VAR_LIST(l) ((os_vdu_var_list *) (vdu_var_list *) (l))
#endif
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