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/*
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Copyright (c) 2003, Dominik Reichl <dominik.reichl@t-online.de>
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All rights reserved.
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LICENSE TERMS
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of ReichlSoft nor the names of its contributors may be used
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to endorse or promote products derived from this software without specific
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prior written permission.
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DISCLAIMER
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "adler32.h"
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CAdler32Hash::CAdler32Hash()
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{
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}
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CAdler32Hash::~CAdler32Hash()
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{
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}
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void CAdler32Hash::Init(RH_DATA_INFO *pInfo)
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{
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m_adler = CONST32(0x00000001);
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m_s1 = m_adler & CONST32(0x0000FFFF);
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m_s2 = (m_adler >> 16) & CONST32(0x0000FFFF);
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}
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void CAdler32Hash::Update(const UWORD8 *pBuf, UINTPREF uLen)
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{
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UWORD32 i;
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for(i = 0; i < uLen; i++)
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{
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m_s1 += *pBuf++;
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if(m_s1 >= 65521) m_s1 -= 65521;
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m_s2 += m_s1;
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if(m_s2 >= 65521) m_s2 -= 65521;
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}
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}
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void CAdler32Hash::Final()
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{
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m_adler = (m_s2 << 16) + m_s1;
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}
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