| /************************************************************** |
| * |
| * 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 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| // MARKER(update_precomp.py): autogen include statement, do not remove |
| #include "precompiled_package.hxx" |
| #include <CRC32.hxx> |
| #ifndef _ZLIB_H |
| #ifdef SYSTEM_ZLIB |
| #include <zlib.h> |
| #else |
| #include <external/zlib/zlib.h> |
| #endif |
| #endif |
| #include <PackageConstants.hxx> |
| #include <com/sun/star/io/XInputStream.hpp> |
| |
| using namespace rtl; |
| 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 SAL_CALL CRC32::reset() |
| throw(RuntimeException) |
| { |
| nCRC=0; |
| } |
| sal_Int32 SAL_CALL CRC32::getValue() |
| throw(RuntimeException) |
| { |
| return nCRC & 0xFFFFFFFFL; |
| } |
| /** Update CRC32 with specified sequence of bytes |
| */ |
| void SAL_CALL CRC32::updateSegment(const Sequence< sal_Int8 > &b, |
| sal_Int32 off, |
| sal_Int32 len) |
| throw(RuntimeException) |
| { |
| nCRC = crc32(nCRC, (const unsigned char*)b.getConstArray()+off, len ); |
| } |
| /** Update CRC32 with specified sequence of bytes |
| */ |
| void SAL_CALL CRC32::update(const Sequence< sal_Int8 > &b) |
| throw(RuntimeException) |
| { |
| nCRC = crc32(nCRC, (const unsigned char*)b.getConstArray(),b.getLength()); |
| } |
| |
| sal_Int32 SAL_CALL CRC32::updateStream( Reference < XInputStream > & xStream ) |
| throw ( RuntimeException ) |
| { |
| sal_Int32 nLength, nTotal = 0; |
| Sequence < sal_Int8 > aSeq ( n_ConstBufferSize ); |
| do |
| { |
| nLength = xStream->readBytes ( aSeq, n_ConstBufferSize ); |
| updateSegment ( aSeq, 0, nLength ); |
| nTotal += nLength; |
| } |
| while ( nLength == n_ConstBufferSize ); |
| |
| return nTotal; |
| } |
