[Zlib-devel] infnew-5b available for testing

[Mark Adler]

On Friday, January 3, 2003, at 05:33  AM, Glenn Randers-Pehrson wrote:
> The MIPS compiler doesn't care much for the "do { } while(0|1)"
> blocks, which look to me like some kind of optimization trick
> aimed at a particular compiler.

No, they're not for optimization.  The do {} while (0) is simply a 
construct to allow a macro to behave syntactically exactly like a 
function.  It does not generate any code on any compiler that I'm aware 
of.  However, if it causes warnings, I will use a different, less 
appealing construct.

The do {} while (1) is simply a loop, which I find rather more 
aesthetically pleasing than for (;;), but in the never-ending quest to 
quell the concerns of compilers everywhere, I will change it to the 
latter.  Does while (1) { ... } give a warning on your compiler?

> Also there are warnings when an assignment narrows the variable
> being assigned, such as in CRC2, which exhibits both problems:

More typecasting is no problem.  Please let me know where all the 
instances are.

If anyone else has pesky compiler warnings, also please let me know.  
Thanks.

mark