I need turn a 6 digit hex number into an 8 digit hex number with the 6 digits the least significant digits of the 8 digit number.

In otherwords lets say I have... A00BCD, I need to end up with FFA00BCD. The leading FF in the 8 digit number will always be FF and range from FF000000 to FFFFFFFF.

I know there must be an easy way to do this in C but it is escaping me.

Thanks

 

You need not do anything more then OR your number with 0xFF000000.

 

How about number|=0xff000000; ? Obviously number needs to be the right size integer to hold it.
Edit: aww snap, too slow

 

Thanks guys, that was quick.. Can't believe this escaped me.. Getting old is a bitch.

 

GMTA kubeek <grin>

You at least gave him the code and the size warning.

 

Yeah, but the size warning was kinda pointless, because you don´t usually get 3byte numbers, so if you can fit 3B you will be able to fit 4B. But the singned-ness will matter.