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/* -*- 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 .
*/
#ifndef _XMLSEARCH_UTIL_DECOMPRESSOR_HXX_
#define _XMLSEARCH_UTIL_DECOMPRESSOR_HXX_
#include <vector>
#include <excep/XmlSearchExceptions.hxx>
#include <util/RandomAccessStream.hxx>
namespace xmlsearch {
namespace util {
class Decompressor
{
public:
Decompressor()
: toRead_( 0 )
{
}
virtual ~Decompressor() { }
virtual sal_Int32 getNextByte() = 0;
virtual void initReading()
{
toRead_ = 0;
}
private:
static const sal_Int32 BitsInByte;
static const sal_Int32 NBits;
sal_Int32 toRead_;
};
class StreamDecompressor
: public Decompressor
{
public:
StreamDecompressor( RandomAccessStream* in )
: in_( in )
{
}
~StreamDecompressor() { }
virtual sal_Int32 getNextByte();
private:
RandomAccessStream* in_;
};
class ByteArrayDecompressor
: public Decompressor
{
public:
ByteArrayDecompressor( sal_Int32 arrayL,sal_Int8* array,sal_Int32 index )
{
initReading(array,arrayL,index);
}
~ByteArrayDecompressor() { }
sal_Int32 bytesRead()
{
return index_ - index0_;
}
sal_Int32 getNextByte() throw( xmlsearch::excep::XmlSearchException )
{
if( arrayL_ <= index_ )
throw xmlsearch::excep::XmlSearchException(
rtl::OUString(RTL_CONSTASCII_USTRINGPARAM( "ByteArrayDecompressor->getNextByte()" )) );
return array_[index_++] & 0xFF;
}
private:
sal_Int32 arrayL_;
sal_Int8 *array_;
sal_Int32 index_,index0_;
using xmlsearch::util::Decompressor::initReading;
void initReading( sal_Int8* array,sal_Int32 arrayL,sal_Int32 index )
{
arrayL_ = arrayL;
array_ = array;
index_ = index0_ = index;
Decompressor::initReading();
}
};
}
}
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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