/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* * This file is part of the LibreOffice project. * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. * * This file incorporates work covered by the following license notice: * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed * with this work for additional information regarding copyright * ownership. The ASF licenses this file to you under the Apache * License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 . */ #include #include #include #include using namespace com::sun::star::uno; using namespace com::sun::star::io; /** A class to compute the CRC32 value of a data stream */ CRC32::CRC32() : nCRC(0) { } CRC32::~CRC32() { } void CRC32::reset() { nCRC=0; } sal_Int32 CRC32::getValue() { return nCRC & 0xFFFFFFFFL; } /** Update CRC32 with specified sequence of bytes */ void CRC32::updateSegment(const Sequence< sal_Int8 > &b, sal_Int32 len) { nCRC = rtl_crc32(nCRC, b.getConstArray(), len ); } /** Update CRC32 with specified sequence of bytes */ void CRC32::update(const Sequence< sal_Int8 > &b) { nCRC = rtl_crc32(nCRC, b.getConstArray(),b.getLength()); } sal_Int64 CRC32::updateStream( Reference < XInputStream > const & xStream ) { sal_Int32 nLength; sal_Int64 nTotal = 0; Sequence < sal_Int8 > aSeq ( n_ConstBufferSize ); do { nLength = xStream->readBytes ( aSeq, n_ConstBufferSize ); updateSegment ( aSeq, nLength ); nTotal += nLength; } while ( nLength == n_ConstBufferSize ); return nTotal; } /* vim:set shiftwidth=4 softtabstop=4 expandtab: */