... C builtin functions?

[dave at ur-helheim.UUCP]

In article <359 at uvacs.UUCP> rwl at uvacs.UUCP (Ray Lubinsky) writes:
>> >C has standard built-in functions????
>> 
>> It looks like a function invocation, and is known and understood
>> by the compiler...
>
>The thing is, sizeof() evaluates to a constant *at run time*, just like
>'c'<<3  or  BUFSIZ  .  That makes it a pretty trivial function.  All it
>really does is give you a portable, automatic facility for referring to
>system dependencies.
>
>Ray Lubinsky	University of Virginia, Dept. of Computer Science

< *  italics mine * >

sizeof and BUFSIZ and a good implementation of  'c' << 3 resolve to 
constants at *compile time*.  No run time *evaluation* is necessary.



-- 
"The Faster I Go the Behinder I Get"
--Lewis Carroll

Dave Carlson

{allegra,seismo,decvax}!rochester!ur-valhalla!dave