[Guy Harris <guy@xxxxxxxxxxxx>]

On Oct 5, 2003, at 7:49 PM, Ronnie Sahlberg wrote:

> We would need new functions tvb_get_int64n() and tvb_get_int64le() that
> stores the value in a char[8]
> then we would need a few support routines to do simple arithmetics and
> operations on such char[8]s like
>    int64_div_by_guint32()
>    int64_get_high()
>    int64_get_low()

I think GCC has, in its support library, routines to do 64-bit 
arithmetic, although it doesn't, I think, have any for simple 
operations such as addition and subtraction as GCC 2.x and 3.x generate 
inline code for those.

Perhaps having the support routines just do the arithmetic in C if the 
platform supports g{u}int64, and use GCC routines when available 
otherwise would be the right answer here.