mirror of
https://github.com/LibreOffice/core.git
synced 2025-07-26 15:45:26 +00:00
796097c546
Change-Id: I514b022256acc60c20e430ef6e68815a47859ab6 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/181185 Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com> Tested-by: Jenkins
122 lines
3.4 KiB
C++
122 lines
3.4 KiB
C++
/* -*- 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/.
|
|
*/
|
|
|
|
#ifndef INCLUDED_SAX_SOURCE_TOOLS_CACHEDOUTPUTSTREAM_HXX
|
|
#define INCLUDED_SAX_SOURCE_TOOLS_CACHEDOUTPUTSTREAM_HXX
|
|
|
|
#include <sal/types.h>
|
|
#include <rtl/byteseq.hxx>
|
|
|
|
#include <com/sun/star/io/XOutputStream.hpp>
|
|
#include <com/sun/star/uno/Sequence.hxx>
|
|
|
|
#include <cstring>
|
|
#include <memory>
|
|
|
|
namespace sax_fastparser {
|
|
|
|
typedef rtl::ByteSequence Int8Sequence;
|
|
|
|
class ForMergeBase
|
|
{
|
|
public:
|
|
virtual ~ForMergeBase() {}
|
|
virtual void append( const Int8Sequence& rWhat ) = 0;
|
|
};
|
|
|
|
class CachedOutputStream
|
|
{
|
|
/// When buffer hits this size, it's written to mxOutputStream
|
|
static const sal_Int32 mnMaximumSize = 0x100000; // 1Mbyte
|
|
|
|
/// ForMerge structure is used for sorting elements in Writer
|
|
std::shared_ptr< ForMergeBase > mpForMerge;
|
|
const Int8Sequence maCache;
|
|
/// Output stream, usually writing data into files.
|
|
css::uno::Reference< css::io::XOutputStream > mxOutputStream;
|
|
uno_Sequence *pSeq;
|
|
sal_Int32 mnCacheWrittenSize;
|
|
bool mbWriteToOutStream;
|
|
|
|
public:
|
|
CachedOutputStream() : maCache(mnMaximumSize, rtl::BYTESEQ_NODEFAULT)
|
|
, pSeq(maCache.get())
|
|
, mnCacheWrittenSize(0)
|
|
, mbWriteToOutStream(true)
|
|
{}
|
|
|
|
const css::uno::Reference< css::io::XOutputStream >& getOutputStream() const
|
|
{
|
|
return mxOutputStream;
|
|
}
|
|
|
|
void setOutputStream( const css::uno::Reference< css::io::XOutputStream >& xOutputStream )
|
|
{
|
|
mxOutputStream = xOutputStream;
|
|
}
|
|
|
|
void setOutput(const std::shared_ptr<ForMergeBase>& pForMerge)
|
|
{
|
|
flush();
|
|
mbWriteToOutStream = false;
|
|
mpForMerge = pForMerge;
|
|
}
|
|
|
|
void resetOutputToStream()
|
|
{
|
|
flush();
|
|
mbWriteToOutStream = true;
|
|
mpForMerge.reset();
|
|
}
|
|
|
|
/// cache string and if limit is hit, flush
|
|
void writeBytes( const sal_Int8* pStr, sal_Int32 nLen )
|
|
{
|
|
// Write when the buffer gets big enough
|
|
if (mnCacheWrittenSize + nLen > mnMaximumSize)
|
|
{
|
|
flush();
|
|
|
|
// Writer does some elements sorting, so it can accumulate
|
|
// pretty big strings in FastSaxSerializer::ForMerge.
|
|
// In that case, just flush data and write immediately.
|
|
if (nLen > mnMaximumSize)
|
|
{
|
|
if (mbWriteToOutStream)
|
|
mxOutputStream->writeBytes( css::uno::Sequence<sal_Int8>(pStr, nLen) );
|
|
else
|
|
mpForMerge->append( Int8Sequence(pStr, nLen) );
|
|
return;
|
|
}
|
|
}
|
|
|
|
memcpy(pSeq->elements + mnCacheWrittenSize, pStr, nLen);
|
|
mnCacheWrittenSize += nLen;
|
|
}
|
|
|
|
/// immediately write buffer into mxOutputStream and clear
|
|
void flush()
|
|
{
|
|
// resize the Sequence to written size
|
|
pSeq->nElements = mnCacheWrittenSize;
|
|
if (mbWriteToOutStream)
|
|
mxOutputStream->writeBytes( css::uno::toUnoSequence(maCache) );
|
|
else
|
|
mpForMerge->append( maCache );
|
|
// and next time write to the beginning
|
|
mnCacheWrittenSize = 0;
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|