138 lines
3.2 KiB
C++
138 lines
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef _XMLSEARCH_UTIL_DECOMPRESSOR_HXX_
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#define _XMLSEARCH_UTIL_DECOMPRESSOR_HXX_
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#include <vector>
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#include <excep/XmlSearchExceptions.hxx>
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#include <util/RandomAccessStream.hxx>
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namespace xmlsearch {
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namespace util {
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class Decompressor
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{
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public:
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Decompressor()
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: toRead_( 0 )
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{
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}
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virtual ~Decompressor() { }
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virtual sal_Int32 getNextByte() = 0;
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virtual void initReading()
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{
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toRead_ = 0;
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}
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private:
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static const sal_Int32 BitsInByte;
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static const sal_Int32 NBits;
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sal_Int32 toRead_;
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};
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class StreamDecompressor
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: public Decompressor
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{
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public:
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StreamDecompressor( RandomAccessStream* in )
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: in_( in )
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{
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}
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~StreamDecompressor() { }
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virtual sal_Int32 getNextByte();
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private:
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RandomAccessStream* in_;
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};
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class ByteArrayDecompressor
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: public Decompressor
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{
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public:
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ByteArrayDecompressor( sal_Int32 arrayL,sal_Int8* array,sal_Int32 index )
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{
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initReading(array,arrayL,index);
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}
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~ByteArrayDecompressor() { }
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sal_Int32 bytesRead()
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{
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return index_ - index0_;
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}
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sal_Int32 getNextByte() throw( xmlsearch::excep::XmlSearchException )
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{
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if( arrayL_ <= index_ )
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throw xmlsearch::excep::XmlSearchException(
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OUString( "ByteArrayDecompressor->getNextByte()" ) );
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return array_[index_++] & 0xFF;
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}
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private:
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sal_Int32 arrayL_;
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sal_Int8 *array_;
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sal_Int32 index_,index0_;
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using xmlsearch::util::Decompressor::initReading;
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void initReading( sal_Int8* array,sal_Int32 arrayL,sal_Int32 index )
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{
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arrayL_ = arrayL;
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array_ = array;
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index_ = index0_ = index;
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Decompressor::initReading();
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}
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};
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}
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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