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#pragma once
#include <vector>
#include "comLightCommon.h"
// COM interfaces to marshal streams across the interop.
namespace ComLight
{
enum struct eSeekOrigin : uint8_t
{
Begin = 0,
Current = 1,
End = 2
};
namespace details
{
template<class E>
inline size_t sizeofVector( const std::vector<E>& vec )
{
return sizeof( E ) * vec.size();
}
}
// COM interface for readonly stream. You'll get these interfaces what you use [ReadStream] attribute in C#.
struct DECLSPEC_NOVTABLE iReadStream : public IUnknown
{
DEFINE_INTERFACE_ID( "006af6db-734e-4595-8c94-19304b2389ac" );
virtual HRESULT COMLIGHTCALL read( void* lpBuffer, int nNumberOfBytesToRead, int &lpNumberOfBytesRead ) = 0;
virtual HRESULT COMLIGHTCALL seek( int64_t offset, eSeekOrigin origin ) = 0;
virtual HRESULT COMLIGHTCALL getPosition( int64_t& position ) = 0;
virtual HRESULT COMLIGHTCALL getLength( int64_t& length ) = 0;
template<class E>
inline HRESULT read( std::vector<E>& vec )
{
const int cb = (int)details::sizeofVector( vec );
int cbRead = 0;
CHECK( read( vec.data(), cb, cbRead ) );
if( cbRead >= cb )
return S_OK;
return E_EOF;
}
};
// COM interface for readonly stream. You'll get these interfaces what you use [WriteStream] attribute in C#.
struct DECLSPEC_NOVTABLE iWriteStream : public IUnknown
{
DEFINE_INTERFACE_ID( "d7c3eb39-9170-43b9-ba98-2ea1f2fed8a8" );
virtual HRESULT COMLIGHTCALL write( const void* lpBuffer, int nNumberOfBytesToWrite ) = 0;
virtual HRESULT COMLIGHTCALL flush() = 0;
template<class E>
inline HRESULT write( const std::vector<E>& vec )
{
const int cb = (int)details::sizeofVector( vec );
return write( vec.data(), cb );
}
};
}
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