[PATCH] tcp.c: elimiate warining "format '%ld', but argument has type 'ssize_t'

Jeffrey Hutzelman jhutz at cmu.edu
Tue Feb 2 00:56:23 CET 2010

--On Monday, February 01, 2010 04:17:56 PM -0500 Frank Cusack 
<fcusack at fcusack.com> wrote:

>>   I took a look... it's size_t.  Which is 0-4K for any RADIUS packet.
>>   The "portable" fix is to change %ld to %d, and to add an explicit
>> cast: (int) packet->data_len.
> There is a size_t printf format specifier.  %z I think.  Barring that,
> since size_t is probably "at least" 32 bits and int is only guaranteed
> to be 16 bits, and also since size_t is unsigned, the more correct fix
> would be casting to unsigned long.  But %z if that is correct is better.

Yes, it's 'z', but it's a size modifier, not a conversion.  So '%zd' will 
work to print a size_t value in decimal.  If your printf conforms to C99, 
which may not be a constraint FreeRadius wishes to adopt.

-- Jeff

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