[Full-disclosure] Major gcc 4.1.1 and up security issue
m.graf at shoplogistics.de
Wed Jan 17 18:07:19 GMT 2007
off topic thoughts:
> (twice 1.15 will likely be a bit or two different than 3.30). As Fortran
> geeks have known for over half a century, a better way to code this is:
> if (abs(a-b) < n*epsilon*a)
> where 'epsilon' is the hardware constant defining the smallest number such
> that 1+a is different from 1, and 'n' controls how many significant digits
> we require in the test.
assume a = b = -1.0
abs(a-b) is zero or maybe a little bit above
n*epsilon*a is negative (n>0, epsilon>0, a=-1)
Test fails :-(
Just my $0.02
Hail Eris! Hail Discordia!
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