Bug 3718 - bg_lib.c vsnprintf behaves strangely with NaN
Status: RESOLVED WONTFIX
Alias: None
Product: ioquake3
Classification: Unclassified
Component: Misc
Version: unspecified
Hardware: PC Linux
: P3 minor
Assignee: Zachary J. Slater
QA Contact: ioquake3 bugzilla mailing list
URL:
Depends on:
Blocks:
 
Reported: 2008-07-14 15:58 EDT by Ben Millwood
Modified: 2009-09-14 07:04:10 EDT
1 user (show)

See Also:


Description Ben Millwood 2008-07-14 15:58:10 EDT 
The following:

G_Printf( "%f\n", scale );

printed only a minus sign (not even a newline) when Q_isnan( scale ) was true.
Comment 1 Ben Millwood 2009-05-07 16:59:42 EDT 
I think the same is true here of any floating-point number that is outside the bounds of the integer data type, because of bg_lib.c:1632

  intpart = ufvalue;

which obviously isn't going to work very well if the number is bigger than INT_MAX.
There's no easy way to fix this - I believe glibc just uses a bignum library.
It may be possible to hack something together that takes fewer lines of code, but it probably wouldn't be pretty, and anyway no-one except me cares :(
Comment 2 Tim Angus 2009-09-14 07:04:10 EDT 
Yeah this isn't really very important. If you come up with a sensible patch, reopen.