[Haskell-cafe] Re: ANNOUNCE: protocol-buffers-0.2.9 for Haskell is
marlowsd at gmail.com
Tue Sep 23 15:22:18 EDT 2008
Chris Kuklewicz wrote:
> I am cross-posting this message to several lists.
> I had learned the trick before the documentation was updated. It seems
> I have used a very unreliable trick. And the "use castToSTUArray"
> suggested alternative is a really poor one since I am not using arrays
> at all.
castSTUArray is the way GHC does it - the idea is to allocate a small
array, store the Float/Double in it, cast the type of the array to
Word32 or whatever, and then read out the contents.
It's more or less equivalent to the peek/poke solution, except that it
doesn't need unsafePerformIO.
GHC's code is here: (look for floatToWord):
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