>  
> > Why did you use memcpy() instead of structure assignment in
> > crdup and crcopy?
> 
> I don't like structure assignments.
> 
Structure assignments are good; compilers can use special instructions to
avoid a subroutine call for copying the structure. 

Gcc can even make use of builtin memcpy, but for other compilers 
structure assignments will do the job.

-- Ragge