BCD List to HEX List

[John Machin]

bryanjugglercryptographer at yahoo.com wrote:
> Philippe Martin wrote:
> > Yes, I came here for the "algorithm" question, not the code result.
>
> To turn BCD x to binary integer y,
>
>   set y to zero
>   for each nibble n of x:
>     y = (((y shifted left 2) + y) shifted left 1) + n

Yeah yeah yeah
i.e. y = y * 10 + n
he's been shown that already.

Problem is that the OP needs an 8-decimal-digit (32-bits) answer, but
steadfastly maintains that he doesn't "have access to" long (32-bit)
arithmetic in his C compiler!!!

>
> Do you need instruction on extracting nibbles, and shifting and
> adding integers?
> 
> A problem this small and simple does not call for a prototype.