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80 lines
2.1 KiB
C++
80 lines
2.1 KiB
C++
////////////////////////////////////////////////////////////////////////////////////////
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//
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// Nestopia - NES/Famicom emulator written in C++
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//
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// Copyright (C) 2003-2008 Martin Freij
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//
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// This file is part of Nestopia.
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//
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// Nestopia is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// Nestopia is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Nestopia; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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////////////////////////////////////////////////////////////////////////////////////////
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#include "NstAssert.hpp"
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#include "NstChecksum.hpp"
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#include "NstCrc32.hpp"
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namespace Nes
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{
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namespace Core
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{
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#ifdef NST_MSVC_OPTIMIZE
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#pragma optimize("s", on)
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#endif
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Checksum::Checksum()
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: crc32(0) {}
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Checksum::Checksum(const byte* data,dword size)
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: crc32(0)
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{
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Compute( data, size );
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}
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void Checksum::Clear()
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{
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crc32 = 0;
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sha1.Clear();
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}
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void Checksum::Compute(const byte* data,dword size)
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{
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crc32 = Crc32::Compute( data, size, crc32 );
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Sha1::Compute( sha1, data, size );
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}
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void Checksum::Recompute(const byte* data,dword size)
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{
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Clear();
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Compute( data, size );
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}
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bool Checksum::operator == (const Checksum& checksum) const
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{
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NST_VERIFY( (crc32 == checksum.crc32) == (sha1 == checksum.sha1) );
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return crc32 == checksum.crc32 && sha1 == checksum.sha1;
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}
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bool Checksum::operator ! () const
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{
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NST_VERIFY( !crc32 == !sha1 );
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return !crc32 && !sha1;
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}
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#ifdef NST_MSVC_OPTIMIZE
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#pragma optimize("", on)
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#endif
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}
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}
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