scanf fully IEEE 754 compliant ?

[Pascal A. Dupuis]

Hello,

I have a small problem/inquiry about octave. I need to parse a file
made of some header lines, then floats separated by tabs. Problem is,
the application generating the file sometimes put values like Inf,
+Inf, -Inf. At this point I've written some wrappers around scanf and
fscanf which try to detect the IEEE754 exceptions Inf and NaN in the
remaining of the string/file.

Life would be easier if the octave scanf/fscanf implementation take
care of such values, as currently there remain problems with the
workarounds:
- the fscanf wrapper needs the file to be rewindable, it can't be
applied to a pipe
- the scanf wrapper can't figure where the scan would finish, so it is a
mix of split() and index().  

About portability: recent glibc-2.0 scanf and fscanf fully supports the
inf and nan values. Don't know about libstdc++ ?

Best regards

Pascal Dupuis

-- 
Dr. ir. Pascal Dupuis
K. U. Leuven, ESAT/ELECTA (formerly ELEN):  http://www.esat.kuleuven.ac.be/
Kasteelpark Arenberg, 10; B-3001 Leuven-Heverlee, Belgium
Tel. +32-16-32 10 21 -- Fax +32-16-32 19 85



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