[cffi-devel] Grovel float constants

[Stelian Ionescu]

On Mon, 2009-05-25 at 17:21 -0400, Liam Healy wrote:
> I am trying to use cffi-grovel on GSL's physical constants.
> For example, in
> http://git.savannah.gnu.org/cgit/gsl.git/tree/const/gsl_const_mksa.h,
> these are defined:
> #define GSL_CONST_MKSA_SPEED_OF_LIGHT (2.99792458e8) /* m / s */
> #define GSL_CONST_MKSA_GRAVITATIONAL_CONSTANT (6.673e-11) /* m^3 / kg s^2 */
> 
> When I try to define these using CFFI-grovel
> (constant (+mksa-speed-of-light+ "GSL_CONST_MKSA_SPEED_OF_LIGHT"))
> I end up with an integer, because the C definition is cast to an
> integer prior to generating the
> constant.
> 
> Is there a way to get around this, so that I can grovel float constants?

not at the moment. you would need to modify the CONSTANT directive(add
a :type key arg that defaults to :int). patches accepted, otherwise I'll
try to do it myself this weekend or next week

-- 
Stelian Ionescu a.k.a. fe[nl]ix
Quidquid latine dictum sit, altum videtur.

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