JNA C Library Wrapper

[Дмитрий Заводников]

Hello!

I am a novice into JNA and maybe don't know well-known use-cases...

I am have such code in h-file:

...
void do_smf(FILE* file);
...

And it will be called from Java throw JNA like this:

...
public void do_smf(FILE file);
...

Where FILE is some class and I should create C library wrapper, open some file into this
library, get object FILE and use it to call method do_smf.

So, have already JNA some existing wrapper for C library or method to use java.io.File
without c FILE?

[Timothy Wall]

It'd be easier if your native code exposed an interface that let you feed it a stream of bytes, or even a filename instead.

Since the FILE structure is opaque, you don't actually have to map it in JNA, you can generally get by using a Pointer, e.g.

Pointer fopen(String filename, String mode);
void fclose(Pointer fp);

If you want to get fancy and type-safe, you could do:

class FILE extends PointerType { }
FILE fopen(String filename, String mode);
void fclose(FILE fp);

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[Дмитрий Заводников]

Thank you for your responce!

I am already implement seconf way with class FILE that extends PointerType.

вторник, 21 мая 2013 г., 5:32:05 UTC+6 пользователь Timothy Wall написал: