>update: and for Mem4UToNum ?
I'ld hesitate, since somebody could read that as a "MemoryForYouToNum" <g>.
I was thinking more about MemU32ToNum:
Seen from pure hardware, MemU4ToNum seems to be the shortest and also safe for future developments. On the OS level there are sometimes operations/pointers 32 <= x <= 64, which AFAIK not always fall on a byte border, but these tend to *stay* pointers, so no need to transform.

regards

thomas