Re: [Chicken-users] [ANN] New "numbers" egg branch

[Kon Lovett]

On Mar 14, 2010, at 2:37 PM, John Cowan wrote:

> Peter Bex scripsit:
>
> > It is currently at a state where people can test it.  Please do,  
> > and let
> > me know if you find any bugs.  The code can be found in Subversion:
> > https://chicken.wiki.br/svn/chicken-eggs/release/4/numbers/branches/standalone
>
> This is not exactly a bug, but I note that you compute the system's
> floating-point parameters at run time instead of using the standard
> <float.h> header.  There's a quick summary of this header at
> http://en.wikipedia.org/wiki/Float.h and a detailed explanation at
> http://www.opengroup.org/onlinepubs/9699919799/basedefs/float.h.html .

The applicable values (for double) from float.h are exported by chicken:

(define maximum-flonum (foreign-value "DBL_MAX" double))
(define minimum-flonum (foreign-value "DBL_MIN" double))
(define flonum-radix (foreign-value "FLT_RADIX" int))
(define flonum-epsilon (foreign-value "DBL_EPSILON" double))
(define flonum-precision (foreign-value "DBL_MANT_DIG" int))
(define flonum-decimal-precision (foreign-value "DBL_DIG" int))
(define flonum-maximum-exponent (foreign-value "DBL_MAX_EXP" int))
(define flonum-minimum-exponent (foreign-value "DBL_MIN_EXP" int))
(define flonum-maximum-decimal-exponent (foreign-value  
"DBL_MAX_10_EXP" int))
(define flonum-minimum-decimal-exponent (foreign-value  
"DBL_MIN_10_EXP" int)

> --
> John Cowan    http://ccil.org/~cowan  address@hidden
> Arise, you prisoners of Windows / Arise, you slaves of Redmond, Wash,
> The day and hour soon are coming / When all the IT folks say "Gosh!"
> It isn't from a clever lawsuit / That Windowsland will finally fall,
> But thousands writing open source code / Like mice who nibble  
> through a wall.
>        --The Linux-nationale by Greg Baker
>
>
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Best Wishes,
Kon