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////////////////////////////////////////////////////////////////////////////////////////
//
// Nestopia - NES/Famicom emulator written in C++
//
// Copyright (C) 2003-2008 Martin Freij
//
// This file is part of Nestopia.
//
// Nestopia 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.
//
// Nestopia 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 Nestopia; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
////////////////////////////////////////////////////////////////////////////////////////
#ifndef NST_COLLECTION_BITSET_H
#define NST_COLLECTION_BITSET_H
#pragma once
#include "NstMain.hpp"
namespace Nestopia
{
namespace Collection
{
class BitSet
{
public:
typedef uint Bits;
private:
Bits bits;
public:
class Bit
{
Bits& bits;
const Bits mask;
public:
Bit(Bits& b,Bits m)
: bits(b), mask(m) {}
operator bool () const
{
return bits & mask;
}
void operator = (bool set)
{
bits = set ? (bits | mask) : (bits & ~mask);
}
};
BitSet(Bits b=0)
: bits(b) {}
Bit operator [] (uint index)
{
return Bit( bits, 1U << index );
}
bool operator [] (uint index) const
{
return bits & (1U << index);
}
uint operator () (uint mask) const
{
return bits & mask;
}
Bits& Word()
{
return bits;
}
const Bits& Word() const
{
return bits;
}
};
}
}
#endif
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