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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2008 by Sun Microsystems, Inc.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * $RCSfile: Decompressor.cxx,v $
 * $Revision: 1.5 $
 *
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_xmlhelp.hxx"
#include <util/Decompressor.hxx>
#include <util/CompressorIterator.hxx>

using namespace xmlsearch;
using namespace xmlsearch::util;

const sal_Int32 Decompressor::BitsInByte = 8;
const sal_Int32 Decompressor::NBits = 32;

inline sal_Int32 getInteger_( const sal_Int8* v )
{
    return (((((( v[0]&0xFF ) << 8 )
               | v[1]&0xFF ) << 8 )
             | v[2]&0xFF ) << 8 )
        | v[3]&0xFF;
}

sal_Int32 StreamDecompressor::getNextByte()
{
  sal_Int8 a[4];
  a[0] = a[1] = a[2] = 0;
  if( in_->readBytes( &a[3],1 ) != -1 )
    return getInteger_( a );
  else
    return -1;
}