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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 __gray_codes_h__
#define __gray_codes_h__
#include "base_c/defs.h"
#include "base_cpp/tlscont.h"
namespace indigo
{
// Enumerate all gray codes starting with zero without loops
class GrayCodesEnumerator
{
public:
GrayCodesEnumerator(int length, bool needFullCode = false);
void next(void);
bool isDone(void);
enum
{
START = -1,
END = -2
};
// Ret: START for the call before first next
int getBitChangeIndex(void);
// Use bitarray.h functions
const byte* getCode(void);
private:
CP_DECL;
TL_CP_DECL(Array<int>, _indices);
TL_CP_DECL(Array<byte>, _code);
bool _needFullCode;
int _bitChangeIndex;
};
} // namespace indigo
#endif
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