[Boost-users] Ann: Floating Point Utilities Review starts today

From: John Maddock (john_at_[hidden])
Date: 2008-02-18 12:27:25

The review of Johan Rade's floating point utilities starts today.

Code and docs can be downloaded from : 
http://www.boost-consulting.com/vault/index.php?action=downloadfile&filename=floating_point_utilities_v3.zip&directory=Math%20-%20Numerics&

The library consists of three parts:

1) Floating point classification routines: these are optimised 
implementations of the C99 and C++ TR1 functions fpclassify, isinf, isnan, 
isnormal and isfinite.  From Boost-1.35 onwards these are already a part of 
Boost.Math (see 
http://svn.boost.org/svn/boost/trunk/libs/math/doc/sf_and_dist/html/math_toolkit/special/fpclass.html) 
so if accepted the two implementations will get merged.

The review here should focus on the implementation used, and testing on 
whatever platforms you have available - in particular are there any 
circumstances (compiler optimisation settings etc) where this implementation 
breaks?

2) Sign manipulation functions: implementations of the C99 and C++ TR1 
functions copysign and signbit, plus the changesign function.  Two of these 
(signbit and copysign) are currently undocumented members of Boost.Math, and 
again the two implementations will get merged if this library is accepted.

Again the main focus of the review here is the implementation, and testing 
thereof especially in the presence of compiler optimisations.

3) C++ locale facets: these will read and write non-finite numbers in a 
portable and round-trippable way: that is not otherwise possible with 
current C++ std library implementations.  These are particularly useful for 
number-serialisation for example.

Since the design is already specified by the C++ standard for these facets, 
your review here should focus on implementation, testing, documentation, and 
perhaps where in Boost these should best be placed if accepted.

These look to be a useful collection of utilities, so I'll look forward to 
your reviews,

Regards,

John Maddock,

Floating Point Utilities Review Manager.