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/*
* Copyright (C) 2007-2012 Xagasoft, All rights reserved.
*
* This file is part of the libgats library and is released under the
* terms of the license contained in the file LICENSE.
*/
#include "gats-qt/gatsstream.h"
#include "gats-qt/object.h"
#ifdef WIN32
#include <winsock2.h>
#else
#include <arpa/inet.h>
#endif
#include <QBuffer>
Gats::GatsStream::GatsStream( QIODevice &rStream ) :
rStream( rStream )
{
}
Gats::GatsStream::~GatsStream()
{
}
Gats::Object *Gats::GatsStream::readObject()
{
char buf[1500];
do
{
if( qbRead.size() < 5 )
{
int iRead = rStream.read( buf, 5-qbRead.size() );
qbRead.append( buf, iRead );
if( qbRead.size() < 5 )
return NULL;
}
} while( !skipReadNulls() );
uint8_t uVer;
uVer = qbRead[0];
int32_t iSize;
memcpy( &iSize, qbRead.constData()+1, 4 );
iSize = ntohl( iSize );
while( qbRead.size() < iSize )
{
int32_t iRead = iSize - qbRead.size();
if( iRead > 1500 )
iRead = 1500;
int32_t iReal = rStream.read( buf, iRead );
qbRead.append( buf, iReal );
if( iReal < iRead )
{
return NULL;
}
}
if( qbRead.size() < iSize )
{
return NULL;
}
QBuffer rTmp( &qbRead );
rTmp.open( QIODevice::ReadOnly );
rTmp.seek( 5 );
Gats::Object *pObj = Gats::Object::read( rTmp );
qbRead.clear();
emit objectRead( pObj );
return pObj;
}
void Gats::GatsStream::readAllObjects()
{
while( readObject() ) { }
}
void Gats::GatsStream::writeObject( Gats::Object *pObject )
{
QIODevice *pTmp;
if( rStream.isSequential() )
{
pTmp = new QBuffer();
pTmp->open( QIODevice::WriteOnly );
}
else
{
pTmp = &rStream;
}
uint8_t uBuf = 1;
uint32_t iSize = 0;
pTmp->write( (const char *)&uBuf, 1 );
uint64_t iSizePos = pTmp->pos();
pTmp->write( (const char *)&iSize, 4 );
pObject->write( *pTmp );
iSize = htonl( pTmp->pos() );
uint64_t iEndPos = pTmp->pos();
pTmp->seek( iSizePos );
pTmp->write( (const char *)&iSize, 4 );
if( rStream.isSequential() )
{
pTmp->close();
rStream.write( ((QBuffer *)pTmp)->data() );
delete pTmp;
}
else
{
pTmp->seek( iSizePos );
}
}
bool Gats::GatsStream::skipReadNulls()
{
bool bHaveSeeked = false;
for(;;)
{
if( qbRead.size() == 0 )
return false;
if( qbRead.at(0) != 0 )
return !bHaveSeeked; //true;
else
{
qbRead.remove( 0, 1 );
bHaveSeeked = true;
}
}
}
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