20 Jul
2008
20 Jul
'08
2:26 a.m.
In order to write portable code that accesses C structures, you need to write a c shim, or better, use the 'hsc2hs' tool to produce portable code. For an example, you can see my OpenSSL binding code in http://repetae.net/repos/ginsu/RSA.hsc in particular the 'createPkey' function. the #ptr construct gets a pointer to a member of a C structure, and #peek and #poke let you read and set members. You should use (#const sizeof(struct foo)) to determine how much memory you need to allocate for a structure. (unless the API you are binding specifies some other allocation method) John -- John Meacham - ⑆repetae.net⑆john⑈