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/************************************************************************* |
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* |
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* OpenOffice.org - a multi-platform office productivity suite |
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* |
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* $RCSfile$ |
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* |
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* $Revision$ |
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* |
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* last change: $Author$ $Date$ |
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* |
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* The Contents of this file are made available subject to |
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* the terms of GNU Lesser General Public License Version 2.1. |
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* |
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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 2005 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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// MARKER(update_precomp.py): autogen include statement, do not remove |
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#include "precompiled_package.hxx" |
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#ifndef _ADLER32_HXX |
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#include <Adler32.hxx> |
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#endif |
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#ifndef _ZLIB_H |
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#ifdef SYSTEM_ZLIB |
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#include <zlib.h> |
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#else |
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#include <external/zlib/zlib.h> |
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#endif |
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#endif |
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/** |
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* A class that can be used to compute the Adler-32 checksum of a data |
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* stream. An Adler-32 checksum is almost as reliable as a CRC-32 but |
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* can be computed much faster. |
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* |
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*/ |
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using namespace rtl; |
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using namespace com::sun::star; |
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Adler32::Adler32() : nAdler(1) |
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{ |
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} |
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Adler32::~Adler32() |
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{ |
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} |
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/** Updates checksum with specified byte |
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*/ |
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void SAL_CALL Adler32::updateByte (sal_Int8 nByte) |
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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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nAdler = adler32(nAdler, pBuf, 1); |
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} |
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/** Updates checksum with specified sequence of bytes |
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*/ |
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void SAL_CALL Adler32::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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{ |
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nAdler = adler32(nAdler, (const unsigned char*)b.getConstArray()+off, len ); |
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} |
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/** Updates checksum with specified sequence of bytes |
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*/ |
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void SAL_CALL Adler32::update(const uno::Sequence< sal_Int8 > &b) |
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{ |
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nAdler = adler32(nAdler, (const unsigned char*)b.getConstArray(),b.getLength()); |
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} |
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/** Returns checksum value. |
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*/ |
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sal_Int32 SAL_CALL Adler32::getValue() |
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{ |
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return (sal_Int32) nAdler & 0xFFFFFFFFL; |
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} |
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/** Resets checksum to initial value. |
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*/ |
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void SAL_CALL Adler32::reset() |
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{ |
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nAdler = 1; |
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} |