Re: how to optimize a for loop

andreyvul wrote:
I have this loop (all variables are pointers):
for (foo = bar; foo > baz; foo--)
*(foo+1) = *foo;
How do I optimize the pointer swap so that it uses -- and ++ or unary
+- instead of +1 (if possible - I don't want to have more #defines
than code)?
IOCCC winners can really help me with this :P

Assuming the pointers are of the same type:

memmove (baz + 2, baz + 1, (bar - (baz + 1)) * sizeof *baz);

--
Eric Sosman
esosman@xxxxxxxxxxxxxxxxxxxx
.