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#include "gats/gatsstream.h"
#include "gats/object.h"
// #include <bu/sio.h>
#include <bu/nullstream.h>
// using namespace Bu;
Gats::GatsStream::GatsStream( Bu::Stream &rStream ) :
rStream( rStream )
{
}
Gats::GatsStream::~GatsStream()
{
}
Gats::Object *Gats::GatsStream::readObject()
{
char buf[1500];
// sio << "Gats::GatsStream::readObject(): Scanning for object header." << sio.nl;
do
{
if( qbRead.getSize() < 5 )
{
// sio << "Gats::GatsStream::readObject(): reading header data, need 5b, have " << qbRead.getSize() << "b." << sio.nl;
int iRead = rStream.read( buf, 5-qbRead.getSize() );
qbRead.write( buf, iRead );
if( qbRead.getSize() < 5 )
return NULL;
}
} while( !skipReadNulls() );
uint8_t uVer;
qbRead.peek( &uVer, 1 );
// sio << "Gats::GatsStream::readObject(): Packet version: " << (int)uVer << sio.nl;
int32_t iSize;
qbRead.peek( &iSize, 4, 1 );
iSize = be32toh( iSize );
// sio << "Gats::GatsStream::readObject(): Header read, looking for " << iSize << "b, we have " << qbRead.getSize() << "b." << sio.nl;
while( qbRead.getSize() < iSize )
{
int32_t iRead = iSize - qbRead.getSize();
if( iRead > 1500 )
iRead = 1500;
// sio << "Gats::GatsStream::readObject(): Attempting to read " << iRead << "b." << sio.nl;
int32_t iReal = rStream.read( buf, iRead );
// sio << "Gats::GatsStream::readObject(): Read " << iReal << "b." << sio.nl;
qbRead.write( buf, iReal );
if( iReal < iRead )
{
// sio << "Gats::GatsStream::readObject(): Insufficient data read in block, bailing on read." << sio.nl;
return NULL;
}
}
if( qbRead.getSize() < iSize )
{
// sio << "Gats::GatsStream::readObject(): Somehow, we still don't have enough data, bailing." << sio.nl;
return NULL;
}
// sio << "Gats::GatsStream::readObject(): We have " << qbRead.getSize() << "b of " << iSize << "b, time to read the object." << sio.nl;
qbRead.seek( 5 );
Gats::Object *pObj = Gats::Object::read( qbRead );
// sio << "Gats::GatsStream::readObject(): Read completed, there are " << qbRead.getSize() << "b left in the buffer." << sio.nl;
return pObj;
}
void Gats::GatsStream::writeObject( Gats::Object *pObject )
{
Bu::NullStream ns;
pObject->write( ns );
uint8_t uBuf = 1;
int32_t iSize = htobe32( ns.tell()+5 );
rStream.write( &uBuf, 1 );
rStream.write( &iSize, 4 );
pObject->write( rStream );
// sio << "Object consumed " << ns.tell() << "b." << sio.nl;
}
bool Gats::GatsStream::skipReadNulls()
{
char buf;
// sio << "Gats::GatsStream::skipReadNulls(): Scanning for nulls, " << qbRead.getSize() << "b." << sio.nl;
bool bHaveSeeked = false;
for(;;)
{
if( qbRead.peek( &buf, 1 ) == 0 )
return false;
if( buf != 0 )
return !bHaveSeeked; //true;
else
{
// sio << "Gats::GatsStream::skipReadNulls(): Null byte read, not header yet..." << sio.nl;
qbRead.seek( 1 );
bHaveSeeked = true;
}
}
}
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