unions

[alexz]

I have got the following structure:

struct HostCBW
{
BYTE Signature[4];
BYTE Tag[4];
BYTE DataTransferLen[4];
BYTE CBWFlags; BYTE CBWLUN;
BYTE CBLength;
BYTE CBWCB[16];
};

And the following union:


union CommandBlockWrapper
{
struct HostCBW CBWField;
BYTE CBWBuffer[31];
}CBW;


How can I modify this union, to have the CBW.CBWField.CBWCB[0] to be at the same address as an additional byte variable?
In other words that I will be able to call this particular byte using a different name.
_________________
Alex

[Charlie U]

The structure and the array in the union are just overlapped. You can access the first byte of the union by using either

CBW.CBWBuffer[0]

or

CBW.CBWField.Signature[0].

The other bytes are just accessed similarly in the order that you have declared them.

[alexz]