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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 .
*/
#include "rechead.hxx"
#include "scerrors.hxx"
#include <osl/diagnose.h>
ScMultipleReadHeader::ScMultipleReadHeader(SvStream& rNewStream) :
rStream( rNewStream )
{
sal_uInt32 nDataSize;
rStream.ReadUInt32( nDataSize );
sal_uLong nDataPos = rStream.Tell();
nTotalEnd = nDataPos + nDataSize;
nEntryEnd = nTotalEnd;
rStream.SeekRel(nDataSize);
sal_uInt16 nID;
rStream.ReadUInt16( nID );
if (nID != SCID_SIZES)
{
OSL_FAIL("SCID_SIZES not found");
if ( rStream.GetError() == SVSTREAM_OK )
rStream.SetError( SVSTREAM_FILEFORMAT_ERROR );
// everything to 0, so BytesLeft() aborts at least
pBuf = nullptr; pMemStream = nullptr;
nEntryEnd = nDataPos;
}
else
{
sal_uInt32 nSizeTableLen;
rStream.ReadUInt32( nSizeTableLen );
pBuf = new sal_uInt8[nSizeTableLen];
rStream.Read( pBuf, nSizeTableLen );
pMemStream = new SvMemoryStream( pBuf, nSizeTableLen, StreamMode::READ );
}
nEndPos = rStream.Tell();
rStream.Seek( nDataPos );
}
ScMultipleReadHeader::~ScMultipleReadHeader()
{
if ( pMemStream && pMemStream->Tell() != pMemStream->GetEndOfData() )
{
OSL_FAIL( "Sizes not fully read" );
if ( rStream.GetError() == SVSTREAM_OK )
rStream.SetError( SCWARN_IMPORT_INFOLOST );
}
delete pMemStream;
delete[] pBuf;
rStream.Seek(nEndPos);
}
void ScMultipleReadHeader::EndEntry()
{
sal_uLong nPos = rStream.Tell();
OSL_ENSURE( nPos <= nEntryEnd, "read too much" );
if ( nPos != nEntryEnd )
{
if ( rStream.GetError() == SVSTREAM_OK )
rStream.SetError( SCWARN_IMPORT_INFOLOST );
rStream.Seek( nEntryEnd ); // ignore the rest
}
nEntryEnd = nTotalEnd; // all remaining, if no StartEntry follows
}
void ScMultipleReadHeader::StartEntry()
{
sal_uLong nPos = rStream.Tell();
sal_uInt32 nEntrySize;
(*pMemStream).ReadUInt32( nEntrySize );
nEntryEnd = nPos + nEntrySize;
OSL_ENSURE( nEntryEnd <= nTotalEnd, "read too many entries" );
}
sal_uLong ScMultipleReadHeader::BytesLeft() const
{
sal_uLong nReadEnd = rStream.Tell();
if (nReadEnd <= nEntryEnd)
return nEntryEnd-nReadEnd;
OSL_FAIL("ScMultipleReadHeader::BytesLeft: Error");
return 0;
}
ScMultipleWriteHeader::ScMultipleWriteHeader(SvStream& rNewStream, sal_uInt32 nDefault) :
rStream( rNewStream ),
aMemStream( 4096, 4096 )
{
nDataSize = nDefault;
rStream.WriteUInt32( nDataSize );
nDataPos = rStream.Tell();
nEntryStart = nDataPos;
}
ScMultipleWriteHeader::~ScMultipleWriteHeader()
{
sal_uLong nDataEnd = rStream.Tell();
rStream.WriteUInt16( SCID_SIZES );
rStream.WriteUInt32( aMemStream.Tell() );
rStream.Write( aMemStream.GetData(), aMemStream.Tell() );
if ( nDataEnd - nDataPos != nDataSize ) // matched default ?
{
nDataSize = nDataEnd - nDataPos;
sal_uLong nPos = rStream.Tell();
rStream.Seek(nDataPos-sizeof(sal_uInt32));
rStream.WriteUInt32( nDataSize ); // record size at the beginning
rStream.Seek(nPos);
}
}
void ScMultipleWriteHeader::EndEntry()
{
sal_uLong nPos = rStream.Tell();
aMemStream.WriteUInt32( nPos - nEntryStart );
}
void ScMultipleWriteHeader::StartEntry()
{
sal_uLong nPos = rStream.Tell();
nEntryStart = nPos;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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