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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001-2004 The ScummVM project
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "stdafx.h"
#include "KeysBuffer.h"
namespace CEKEYS {
KeysBuffer::KeysBuffer(int capacity):
_capacity(capacity), _buffer(new Key[capacity]), _currentAdd(0), _currentGet(0) {
}
bool KeysBuffer::add(const Key *key) {
if (_currentAdd == _capacity - 1)
return false;
_currentGet = _currentAdd;
_buffer[_currentAdd++] = *key;
return true;
}
bool KeysBuffer::simulate(const Key *key) {
if (_currentAdd == _capacity - 2)
return false;
_currentGet = _currentAdd;
_buffer[_currentAdd] = *key;
_buffer[_currentAdd++].setPushed(true);
_buffer[_currentAdd] = *key;
_buffer[_currentAdd++].setPushed(false);
return true;
}
KeysBuffer* KeysBuffer::Instance(int capacity) {
if (!_instance)
_instance = new KeysBuffer(capacity);
return _instance;
}
Key* KeysBuffer::get() {
Key *result;
if (_currentAdd <= _currentGet)
return NULL;
result = &_buffer[_currentGet++];
if (_currentGet == _currentAdd) {
_currentGet = 0;
_currentAdd = 0;
}
return result;
}
KeysBuffer::~KeysBuffer() {
delete [] _buffer;
}
KeysBuffer *KeysBuffer::_instance = NULL;
}
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