"ncf" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Example C Code:
> #define P(a,b,c,d,e,f,g,h,x,K) \
> { \
> temp1 = h + S3(e) + F1(e,f,g) + K + x; \
> temp2 = S2(a) + F0(a,b,c); \
> d += temp1; h = temp1 + temp2; \
> }
> Python Code:
> def P(a,b,c,d,e,f,g,h,x,K):
> temp1 = h + S3(e) + F1(e,f,g) + K + x
> temp2 = S2(a) + F0(a,b,c)
> d += temp1; h = temp1 + temp2
Your problem is that you are replacing a C macro, which is inlined and
affects the original 'namespace' in which it appears, and which does not
have a direct Python equivalent, with a Python function (admittedly
slower), which performs its calculation in a separate namespace. So you
have to pass the results back to the calling namespace. Simple enough:
make the last line of P
return d+temp1, temp1+temp2
and the call
a4,a8 = P(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10)
The stuff about mutability and calling conventions is important to learn
eventually but seems beside the point for your immediate application.
Terry J. Reedy
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