Wireshark · Ethereal-dev: Re: [Ethereal-dev] guint128

[Guy Harris <gharris@xxxxxxxxx>]

Stefano Pettini wrote:

> I need a guint128, but I can't find it. :-)

Can you find a C compiler that natively supports 128-bit integral data 
types?  If not, that might be why you can't find guint128. :-)

You'd have to write your own code, or find code, to do whatever's 
necessary to support integral data types bigger than 64 bits.  It might 
be useful to add bignum support to Ethereal, to handle, for example, 
ASN.1 integral values, which are not only not necessarily limited to 32 
bits, or 64 bits, they're not necessarily limited to 128 bits, either; 
GNU MP:

	http://www.swox.com/gmp/

might be reasonable, although they do note that it *is* sensitive to 
compiler bugs (and that one of the more problematic compilers is, err, 
umm, the C compiler whose name begins with the same three-letter acronym 
as the one with which the library's name begins... :-)).

Here's a page for another bignum library, with links to other bignum 
libraries:

	http://thayer.dartmouth.edu/~sting/sw/imath/