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#include "bu/nidsstream.h"
Bu::NidsStream::NidsStream( Nids &rNids, uint32_t uStream ) :
rNids( rNids ),
uStream( uStream ),
pCurBlock( NULL ),
uCurBlock( uStream ),
uSize( 0 ),
uBlockSize( rNids.iBlockSize-sizeof(Nids::Block) ),
uPos( 0 )
{
printf("NidsStream::allocated\n");
pCurBlock = rNids.newBlock();
rNids.getBlock( uStream, pCurBlock );
uSize = pCurBlock->uBytesUsed;
}
/*
Bu::NidsStream::NidsStream( const Bu::NidsStream &rSrc ) :
Stream( rSrc ),
rNids( rSrc.rNids ),
uStream( rSrc.uStream ),
pCurBlock( NULL ),
uCurBlock( uStream ),
uSize( 0 ),
uBlockSize( rSrc.uBlockSize ),
iUsable( uBlockSize-sizeof(Nids::Block) ),
uPos( 0 )
{
printf("NidsStream::copied\n");
pCurBlock = rNids.newBlock();
rNids.getBlock( uStream, pCurBlock );
}*/
Bu::NidsStream::~NidsStream()
{
rNids.updateStreamSize( uStream, uSize );
rNids.deleteBlock( pCurBlock );
}
void Bu::NidsStream::close()
{
}
size_t Bu::NidsStream::read( void *pBuf, size_t nBytes )
{
if( uPos%uBlockSize+nBytes < uBlockSize )
{
size_t iRead = nBytes;
if( iRead > pCurBlock->uBytesUsed )
iRead = pCurBlock->uBytesUsed;
memcpy( pBuf, pCurBlock->pData+(uPos%uBlockSize), iRead );
uPos += nBytes;
printf("a: block %u = %ub (%ub total)\n",
uCurBlock, pCurBlock->uBytesUsed, uSize );
return iRead;
}
else
{
//size_t iTotal = 0;
for(;;)
{
}
}
return 0;
}
size_t Bu::NidsStream::write( const void *pBuf, size_t nBytes )
{
if( uPos%uBlockSize+nBytes < uBlockSize )
{
memcpy( pCurBlock->pData+(uPos%uBlockSize), pBuf, nBytes );
pCurBlock->uBytesUsed += nBytes;
rNids.setBlock( uCurBlock, pCurBlock );
uPos += nBytes;
uSize += nBytes;
printf("a: block %u = %ub (%ub total)\n",
uCurBlock, pCurBlock->uBytesUsed, uSize );
return nBytes;
}
else
{
size_t nTotal = 0;
for(;;)
{
uint32_t uNow = uBlockSize-(uPos%uBlockSize);
if( nBytes < uNow )
uNow = nBytes;
memcpy( pCurBlock->pData+(uPos%uBlockSize),
&((char *)pBuf)[nTotal], uNow );
pCurBlock->uBytesUsed += uNow;
rNids.setBlock( uCurBlock, pCurBlock );
uSize += uNow;
uPos += uNow;
nTotal += uNow;
nBytes -= uNow;
printf("b: block %u = %ub (%ub total)\n",
uCurBlock, pCurBlock->uBytesUsed, uSize );
if( nBytes == 0 )
return nTotal;
if( pCurBlock->uBytesUsed == uBlockSize )
uCurBlock = rNids.getNextBlock( uCurBlock, pCurBlock );
}
}
}
long Bu::NidsStream::tell()
{
return uPos;
}
void Bu::NidsStream::seek( long offset )
{
uPos += offset;
}
void Bu::NidsStream::setPos( long pos )
{
uPos = pos;
}
void Bu::NidsStream::setPosEnd( long pos )
{
uPos = uSize-pos-1;
}
bool Bu::NidsStream::isEOS()
{
return true;
}
bool Bu::NidsStream::isOpen()
{
return true;
}
void Bu::NidsStream::flush()
{
}
bool Bu::NidsStream::canRead()
{
return true;
}
bool Bu::NidsStream::canWrite()
{
return true;
}
bool Bu::NidsStream::isReadable()
{
return true;
}
bool Bu::NidsStream::isWritable()
{
return true;
}
bool Bu::NidsStream::isSeekable()
{
return true;
}
bool Bu::NidsStream::isBlocking()
{
return true;
}
void Bu::NidsStream::setBlocking( bool /*bBlocking*/ )
{
}
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