[Haskell] Finding pointer size
stefanor at cox.net
Fri Feb 16 01:04:40 EST 2007
On Thu, Feb 15, 2007 at 11:56:58PM -0600, Rob Hoelz wrote:
> I'm working with the Foreign module, and I need to allocate a pointer
> to a pointer (in C, a char **). The problem is, I don't know how to
> find out the size of a char * in Haskell. Here's the basic layout of
> the code:
> allocaBytes len $ \ array -> ... -- len is the size of the char ** to
> be allocated times sizeof(char *).
allocaArray nr_of_pointers $ \arrar -> ...
automatically figures the sizeof(char *)
if you really want to know ... sizeOf (undefined ;: Ptr CChar)
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