BCD List to HEX List

[John Machin]

Philippe Martin wrote:
> Sorry forgot a few answers/comments:
>
> John Machin wrote:
> >**** SHOULD BE >=
> >currently add([6, 6], [4, 4] -> [10, 10]
>
> True, thanks
>
> > *** try - 10 instead of % 10
> > If the first operand is > 19, you have a bug!
> > This might save a few CPU cycles on your smartcard
>
> can it ? >

can WHAT do WHAT?

> each array value will be [0..9]

if so, you can use - 10 instead of %10
if not, then whatever produced your input has a bug

>
> >>**** SHOULD CHECK FOR CARRY AT END
> >>currently add([9], [8]) -> [7]
> >>should return [1, 7] or handle overflow somehow
>
> True, this actually should become an error from the card to the calling
> device. That would be a pretty large number though.
>
>
> >>**** MINUS ZERO?
> I just do not want to leave it at one(1) if it is.

The question is "what do you think you are achieving by having a  MINUS
sign in front of the zero instead of plain old ordinary zero?"