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/*************************************************************************
*
* $RCSfile: CRC32.cxx,v $
*
* $Revision: 1.5 $
*
* last change: $Author: mtg $ $Date: 2001-04-19 14:13:40 $
*
* The Contents of this file are made available subject to the terms of
* either of the following licenses
*
* - GNU Lesser General Public License Version 2.1
* - Sun Industry Standards Source License Version 1.1
*
* Sun Microsystems Inc., October, 2000
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2000 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*
* Sun Industry Standards Source License Version 1.1
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.1 (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.openoffice.org/license.html.
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
*
* Copyright: 2000 by Sun Microsystems, Inc.
*
* All Rights Reserved.
*
* Contributor(s): Martin Gallwey (gallwey@sun.com)
*
*
************************************************************************/
#ifndef _CRC32_HXX
#include "CRC32.hxx"
#endif
#ifndef _ZLIB_H
#include <external/zlib/zlib.h>
#endif
using namespace rtl;
using namespace com::sun::star;
/** A class to compute the CRC32 value of a data stream
*/
CRC32::CRC32()
: nCRC(0)
{
}
CRC32::~CRC32()
{
}
void SAL_CALL CRC32::reset()
throw(uno::RuntimeException)
{
nCRC=0;
}
sal_Int32 SAL_CALL CRC32::getValue()
throw(uno::RuntimeException)
{
return nCRC & 0xFFFFFFFFL;
}
/** Update CRC32 with specified byte
*/
void SAL_CALL CRC32::updateByte (sal_Int8 nByte)
throw(uno::RuntimeException)
{
sal_uInt8 pBuf[1];
pBuf[0] = (sal_uInt8)nByte;
nCRC = crc32(nCRC, pBuf, 1);
}
/** Update CRC32 with specified sequence of bytes
*/
void SAL_CALL CRC32::updateSegment(const uno::Sequence< sal_Int8 > &b,
sal_Int32 off,
sal_Int32 len)
throw(uno::RuntimeException)
{
nCRC = crc32(nCRC, (const unsigned char*)b.getConstArray()+off, len );
}
/** Update CRC32 with specified sequence of bytes
*/
void SAL_CALL CRC32::update(const uno::Sequence< sal_Int8 > &b)
throw(uno::RuntimeException)
{
nCRC = crc32(nCRC, (const unsigned char*)b.getConstArray(),b.getLength());
}
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