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/****************************************************************************
* Copyright (C) from 2009 to Present EPAM Systems.
*
* This file is part of Indigo toolkit.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
***************************************************************************/
#ifndef __cyclic_array_h__
#define __cyclic_array_h__
#include "base_cpp/array.h"
#include "base_cpp/exception.h"
namespace indigo
{
DECL_EXCEPTION(CyclicArrayError);
// Cyclic array
template <typename T> struct CyclicArray
{
public:
DECL_TPL_ERROR(CyclicArrayError);
explicit CyclicArray(void)
{
_offset = 0;
}
void setSize(int max_size)
{
_array.resize(max_size);
}
void zeroFill(void)
{
_array.zerofill();
}
bool isInBound(int index) const
{
return index >= _offset && index < _offset + _array.size();
}
const T& operator[](int index) const
{
int length = _array.size();
if (length == 0)
throw Error("Zero length");
int offset = index % _array.size();
return index >= 0 ? _array[offset] : _array[length + offset];
}
T& operator[](int index)
{
int length = _array.size();
if (length == 0)
throw Error("Zero length");
int offset = index % _array.size();
return index >= 0 ? _array[offset] : _array[length + offset];
}
void setOffset(int offset)
{
_offset = offset;
}
protected:
Array<T> _array;
int _offset;
private:
CyclicArray(const CyclicArray&); // no implicit copy
};
} // namespace indigo
#endif // __cyclic_array_h__
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