office-gobmx/package/source/zipapi/ByteChucker.cxx

/*************************************************************************
 *
 *  $RCSfile: ByteChucker.cxx,v $
 *
 *  $Revision: 1.11 $
 *
 *  last change: $Author: mtg $ $Date: 2001-07-04 14:56:24 $
 *
 *  The Contents of this file are made available subject to the terms of
 *  either of the following licenses
 *
 *         - GNU Lesser General Public License Version 2.1
 *         - Sun Industry Standards Source License Version 1.1
 *
 *  Sun Microsystems Inc., October, 2000
 *
 *  GNU Lesser General Public License Version 2.1
 *  =============================================
 *  Copyright 2000 by Sun Microsystems, Inc.
 *  901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License version 2.1, as published by the Free Software Foundation.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *  MA  02111-1307  USA
 *
 *
 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
 *  The contents of this file are subject to the Sun Industry Standards
 *  Source License Version 1.1 (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.openoffice.org/license.html.
 *
 *  Software provided under this License is provided on an "AS IS" basis,
 *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
 *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
 *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
 *  See the License for the specific provisions governing your rights and
 *  obligations concerning the Software.
 *
 *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
 *
 *  Copyright: 2000 by Sun Microsystems, Inc.
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): Martin Gallwey (gallwey@sun.com)
 *
 *
 ************************************************************************/
#ifndef _BYTE_CHUCKER_HXX_
#include <ByteChucker.hxx>
#endif
#ifndef _PACKAGE_CONSTANTS_HXX_
#include <PackageConstants.hxx>
#endif
#include <memory.h> //for memcpy

using namespace ::com::sun::star::io;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::lang;

ByteChucker::ByteChucker(Reference<XOutputStream> xOstream)
: xStream(xOstream)
, xSeek (xOstream, UNO_QUERY )
, a1Sequence ( 1 )
, a2Sequence ( 2 )
, a4Sequence ( 4 )
, aBuffer ( n_ConstNonSpannableBufferSize )
, p1Sequence ( a1Sequence.getArray() )
, p2Sequence ( a2Sequence.getArray() )
, p4Sequence ( a4Sequence.getArray() )
, pBuffer ( aBuffer.getArray() )
, nBufferSize ( n_ConstNonSpannableBufferSize )
, nCurrentBufferPos ( 0 )
, bSpannable ( sal_True )
, bNextWriteIsAtomic ( sal_False )
{
}

ByteChucker::~ByteChucker()
{
}

// XOutputStream chained...
void SAL_CALL ByteChucker::writeBytes( const Sequence< sal_Int8 >& aData, sal_Int32 nLength, const sal_Int8 * const pData )
    throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
{
    if ( !bSpannable )
    {
        if ( nLength < 0 )
            nLength = aData.getLength();
        if (nLength > nBufferSize )
        {
            do
                nBufferSize *= 2;
            while ( nLength > nBufferSize );

            aBuffer.realloc ( nBufferSize );
        }
        memcpy ( pBuffer + nCurrentBufferPos, pData ? pData : aData.getConstArray(), nLength);
        nCurrentBufferPos += nLength;
    }
    else
        xStream->writeBytes(aData);
}
void SAL_CALL ByteChucker::flush(  )
    throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
{
    xStream->flush();
}
void SAL_CALL ByteChucker::closeOutput(  )
    throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
{
    xStream->closeOutput();
}

// XSeekable chained...
sal_Int64 SAL_CALL ByteChucker::seek( sal_Int64 location )
    throw(IllegalArgumentException, IOException, RuntimeException)
{
    if (xSeek.is() )
    {
        sal_Int64 nLen = xSeek->getLength();
        if (location > nLen )
            location = nLen;
        xSeek->seek( location );
        return location;
    }
    else
        throw IOException();
}
sal_Int64 SAL_CALL ByteChucker::getPosition(  )
        throw(IOException, RuntimeException)
{
    if (xSeek.is() )
        return xSeek->getPosition();
    else
        throw IOException();
}
sal_Int64 SAL_CALL ByteChucker::getLength(  )
        throw(IOException, RuntimeException)
{
    if (xSeek.is() )
        return xSeek->getLength();
    else
        throw IOException();
}

void ByteChucker::setSpannable ( sal_Bool bNewSpannable )
{
    // if current data isn't spannable, then it's been stored in the Buffer
    // until we know how much of it there is. Once we start recieving
    // spannable data again, we'll pass it on
    if (!isSpannable() && bNewSpannable)
    {
        bNextWriteIsAtomic = sal_True;
        sal_Int32 nOldLength = aBuffer.getLength();
        aBuffer.realloc ( nCurrentBufferPos );
        xStream->writeBytes( aBuffer );
        aBuffer.realloc ( nOldLength );
        pBuffer = aBuffer.getArray();
        bNextWriteIsAtomic = sal_False;
        nCurrentBufferPos = 0;
    }
    bSpannable = bNewSpannable;
}

ByteChucker& ByteChucker::operator << (sal_Int8 nInt8)
{
    p1Sequence[0] = nInt8  & 0xFF;
    writeBytes( a1Sequence, 1, p1Sequence );
    return *this;
}

ByteChucker& ByteChucker::operator << (sal_Int16 nInt16)
{
    p2Sequence[0] = (nInt16 >>  0 ) & 0xFF;
    p2Sequence[1] = (nInt16 >>  8 ) & 0xFF;
    writeBytes( a2Sequence, 2, p2Sequence );
    return *this;
}
ByteChucker& ByteChucker::operator << (sal_Int32 nInt32)
{
    p4Sequence[0] = (nInt32 >>  0 ) & 0xFF;
    p4Sequence[1] = (nInt32 >>  8 ) & 0xFF;
    p4Sequence[2] = (nInt32 >> 16 ) & 0xFF;
    p4Sequence[3] = (nInt32 >> 24 ) & 0xFF;
    writeBytes( a4Sequence, 4, p4Sequence );
    return *this;
}

ByteChucker& ByteChucker::operator << (sal_uInt8 nuInt8)
{
    p1Sequence[0] = nuInt8  & 0xFF;
    writeBytes( a1Sequence, 1, p1Sequence );
    return *this;
}
ByteChucker& ByteChucker::operator << (sal_uInt16 nuInt16)
{
    p2Sequence[0] = (nuInt16 >>  0 ) & 0xFF;
    p2Sequence[1] = (nuInt16 >>  8 ) & 0xFF;
    writeBytes( a2Sequence, 2, p2Sequence );
    return *this;
}
ByteChucker& ByteChucker::operator << (sal_uInt32 nuInt32)
{
    p4Sequence[0] = static_cast < sal_Int8 > ((nuInt32 >>  0 ) & 0xFF);
    p4Sequence[1] = static_cast < sal_Int8 > ((nuInt32 >>  8 ) & 0xFF);
    p4Sequence[2] = static_cast < sal_Int8 > ((nuInt32 >> 16 ) & 0xFF);
    p4Sequence[3] = static_cast < sal_Int8 > ((nuInt32 >> 24 ) & 0xFF);
    writeBytes( a4Sequence, 4, p4Sequence );
    return *this;
}