110 lines
3.5 KiB
C++
110 lines
3.5 KiB
C++
/*************************************************************************
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*
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* $RCSfile: CRC32.cxx,v $
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*
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* $Revision: 1.2 $
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*
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* last change: $Author: mtg $ $Date: 2000-11-16 11:55:52 $
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*
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* The Contents of this file are made available subject to the terms of
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* either of the following licenses
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*
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* - GNU Lesser General Public License Version 2.1
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* - Sun Industry Standards Source License Version 1.1
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*
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* Sun Microsystems Inc., October, 2000
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2000 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*
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* Sun Industry Standards Source License Version 1.1
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* =================================================
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* The contents of this file are subject to the Sun Industry Standards
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* Source License Version 1.1 (the "License"); You may not use this file
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* except in compliance with the License. You may obtain a copy of the
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* License at http://www.openoffice.org/license.html.
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*
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* Software provided under this License is provided on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
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* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
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* See the License for the specific provisions governing your rights and
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* obligations concerning the Software.
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*
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* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
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*
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* Copyright: 2000 by Sun Microsystems, Inc.
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*
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* All Rights Reserved.
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*
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* Contributor(s): _______________________________________
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*
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*
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************************************************************************/
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#ifndef _CRC32_HXX
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#include "CRC32.hxx"
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#endif
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using namespace rtl;
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using namespace com::sun::star;
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/** A class to compute the CRC32 value of a data stream
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*/
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CRC32::CRC32()
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: nCRC(0)
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{
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}
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CRC32::~CRC32()
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{
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}
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void CRC32::reset()
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{
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nCRC=0;
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}
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sal_Int32 CRC32::getValue()
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{
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return nCRC & 0xFFFFFFFFL;
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}
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/** Update CRC32 with specified byte
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*/
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void SAL_CALL CRC32::updateByte (sal_Int8 nByte)
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throw(uno::RuntimeException)
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{
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sal_uInt8 pBuf[1];
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pBuf[0] = (sal_uInt8)nByte;
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nCRC = crc32(nCRC, pBuf, 1);
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}
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/** Update CRC32 with specified sequence of bytes
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*/
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void SAL_CALL CRC32::updateSegment(const uno::Sequence< sal_Int8 > &b,
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sal_Int32 off,
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sal_Int32 len)
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throw(uno::RuntimeException)
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{
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nCRC = crc32(nCRC, (const unsigned char*)b.getConstArray()+off, len );
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}
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/** Update CRC32 with specified sequence of bytes
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*/
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void SAL_CALL CRC32::update(const uno::Sequence< sal_Int8 > &b)
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throw(uno::RuntimeException)
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{
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nCRC = crc32(nCRC, (const unsigned char*)b.getConstArray(),b.getLength());
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}
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