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#pragma once
#include "../ComLightLib/streams.h"
#include "../ComLightLib/comLightServer.h"
#define WIN32_LEAN_AND_MEAN
#include <atlfile.h>
class ReadStream : public ComLight::ObjectRoot<ComLight::iReadStream>
{
CAtlFile file;
// TODO: implement a buffer in this class, at least 256kb
HRESULT COMLIGHTCALL read( void* lpBuffer, int nNumberOfBytesToRead, int& lpNumberOfBytesRead ) override final
{
return file.Read( lpBuffer, (DWORD)nNumberOfBytesToRead, *(DWORD*)&lpNumberOfBytesRead );
}
HRESULT COMLIGHTCALL seek( int64_t offset, ComLight::eSeekOrigin origin ) override final
{
return file.Seek( offset, (uint8_t)origin );
}
HRESULT COMLIGHTCALL getPosition( int64_t& position ) override final
{
return file.GetPosition( *(ULONGLONG*)&position );
}
HRESULT COMLIGHTCALL getLength( int64_t& length ) override final
{
return file.GetSize( *(ULONGLONG*)&length );
}
public:
HRESULT open( const wchar_t* path )
{
if( file )
return HRESULT_CODE( ERROR_ALREADY_INITIALIZED );
return file.Create( path, GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN );
}
};
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