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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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; either version 2
* of the License, or (at your option) any later version.
* This program 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#ifndef SCI_ENGINE_SELECTOR_H
#define SCI_ENGINE_SELECTOR_H
#include "common/scummsys.h"
#include "sci/engine/vm_types.h" // for reg_t
#include "sci/engine/vm.h"
#include "sci/engine/kernel.h" // for Kernel::_selectorCache
namespace Sci {
/**
* Map a selector name to a selector id. Shortcut for accessing the selector cache.
*/
#define SELECTOR(_slc_) (g_sci->getKernel()->_selectorCache._slc_)
/**
* Retrieves a selector from an object.
* @param segMan the segment mananger
* @param _obj_ the address of the object which the selector should be read from
* @param _slc_ the selector to refad
* @return the selector value as a reg_t
* This macro halts on error. 'selector' must be a selector name registered in vm.h's
* SelectorCache and mapped in script.cpp.
*/
reg_t readSelector(SegManager *segMan, reg_t object, Selector selectorId);
#define readSelectorValue(segMan, _obj_, _slc_) (readSelector(segMan, _obj_, _slc_).offset)
/**
* Writes a selector value to an object.
* @param segMan the segment mananger
* @param _obj_ the address of the object which the selector should be written to
* @param _slc_ the selector to read
* @param _val_ the value to write
* This macro halts on error. 'selector' must be a selector name registered in vm.h's
* SelectorCache and mapped in script.cpp.
*/
void writeSelector(SegManager *segMan, reg_t object, Selector selectorId, reg_t value);
#define writeSelectorValue(segMan, _obj_, _slc_, _val_) writeSelector(segMan, _obj_, _slc_, make_reg(0, _val_))
/**
* Invokes a selector from an object.
*/
void invokeSelector(EngineState *s, reg_t object, int selectorId,
int k_argc, StackPtr k_argp, int argc = 0, const reg_t *argv = 0);
} // End of namespace Sci
#endif // SCI_ENGINE_KERNEL_H
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