John Meacham john at repetae.net
Thu Apr 6 19:37:27 EDT 2006

On Thu, Apr 06, 2006 at 04:28:01PM -0700, John Meacham wrote:
> I was curious if ghc could support the following basic types, they will
> likely just be aliases of existing types.
> WordPtr uintptr_t
> WordMax uintmax_t
> IntPtr  intptr_t
> IntMax  intmax_t
> all these C types are defined by ISO C so should be available,
> otherwise, they are easy enough to generate in ghcs autoconf script.
> jhc provides these under these names in Data.Word and Data.Int.
> they would be useful for writing jhc/ghc portable low level code, and
> writing 32/64 bit safe code.

oh, I forgot the all important conversion routines,

ptrToWordPtr :: Ptr a -> WordPtr
wordPtrToPtr :: WordPtr -> Ptr a

ptrToIntPtr :: Ptr a -> IntPtr
intPtrToPtr :: IntPtr -> Ptr a

jhc makes these available in Jhc.Addr, but if ghc decides to provide
them in a common spot (Foreign.Ptr maybe?)

then I will have jhc follow suit.

I'd also propose these be added to the FFI standard.


John Meacham - ⑆repetae.net⑆john⑈

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