Interop Structure: Should Unsigned Short be Mapped to byte[]?
- by Ngu Soon Hui
I have such a C++ structure:
typedef struct _FILE_OP_BLOCK
{
unsigned short fid; // objective file ID
unsigned short offset; // operating offset
unsigned char len; // buffer length(update)
// read length(read)
unsigned char buff[MAX_BUFF_SIZE];
} FILE_OP_BLOCK;
And now I want to map it in .Net. The tricky thing is that the I should pass a 2 byte array for fid, and integer for len, even though in C# fid is an unsigned short and len is an unsigned char
I wonder whether my structure ( in C#) below is correct?
public struct File_OP_Block
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
public byte[] fid;
public ushort offset;
public byte length;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 240)]
public char[] buff;
}
