Version française
Home     About     Download     Resources     Contact us    
Browse thread
[Caml-list] YAFPFR: Yet another floating point feature request
[ Home ] [ Index: by date | by threads ]
[ Search: ]

[ Message by date: previous | next ] [ Message in thread: previous | next ] [ Thread: previous | next ]
Date: -- (:)
From: Thorsten Ohl <ohl@h...>
Subject: [Caml-list] YAFPFR: Yet another floating point feature request
The C library header file <float.h> contains (among others) the
following useful macros:

   /* Number of decimal digits of precision in a double */
#define DBL_DIG 15
   /* Difference between 1.0 and the minimum double greater than 1.0 */
#define DBL_EPSILON 2.2204460492503131e-16
   /* Minimum normalised double */
#define DBL_MIN 2.2250738585072014e-308
   /* Minimum int x such that 10**x is a normalised double */
#define DBL_MIN_10_EXP (-307)
   /* Maximum double */
#define DBL_MAX 1.7976931348623157e+308
   /* Maximum int x such that 10**x is a representable double */
#define DBL_MAX_10_EXP 308

It would be great if these values were accessible from O'Caml in a
future version so that numerical code could be made to work on
different machines.

Merci,
-Thorsten
-- 
Thorsten Ohl, Physics Department, TU Darmstadt -- ohl@hep.tu-darmstadt.de
http://heplix.ikp.physik.tu-darmstadt.de/~ohl/ [<=== PGP public key here]
-------------------
Bug reports: http://caml.inria.fr/bin/caml-bugs  FAQ: http://caml.inria.fr/FAQ/
To unsubscribe, mail caml-list-request@inria.fr  Archives: http://caml.inria.fr