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831 :: Importing types from C headers

[2015-02-04T15:09:48+01:00]

andrea (orginal) [2015-02-04T15:09:48+01:00] view original

I am trying to use a C third party library that returns status codes whose type is defined in a dedicated C header. Is there a way to tell Nim to read types from C headers?

The section on the FFI allows one to import C functions, but the types are always primitive types or strings in the examples. What about structs defined elsewhere?

gradha (orginal) [2015-02-04T15:56:17+01:00] view original

Have you tried using c2nim to convert the header into a nim module? It may generate source code which answers your questions.

andrea (orginal) [2015-02-04T18:42:45+01:00] view original

I have just tried, but c2nim fails to parse the header due a custom macro they are using

def (orginal) [2015-02-04T19:01:29+01:00] view original

You'll have to remove stuff from the header until c2nim can parse it.

Araq (orginal) [2015-02-04T19:20:54+01:00] view original

Here we go again... Use #def for these macros to let c2nim expand them. (Does anybody read any manual these days?)

andrea (orginal) [2015-02-04T20:34:07+01:00] view original

Thank you for your suggestions! I am sorry I did not read the c2nim manual carefully. (It looks like one doens't even bother to read anything, but often the issue is that one does not know where to look until, well, one knows. I assumed that c2nim couldn't cope with macros and it didn't cross my mind that there is an option for them)

pwernersbach (orginal) [2015-02-04T22:20:25+01:00] view original

I used to have a problem with finding documentation until the link to the documentation index was published. I'd like to point out that a search for "c2nim" on the documentation index yields no results.