From: T Teemu E Kurppa <ttkurppa@cs.Helsinki.FI>
To: <caml-list@inria.fr>
Subject: [Caml-list] CamlIDL: omitting struct fields
Date: Mon, 27 Aug 2001 09:48:37 +0300 (EEST) [thread overview]
Message-ID: <Pine.LNX.4.33.0108270928120.13703-100000@harvakari.cs.Helsinki.FI> (raw)
Last weekend I started working on a hobby project, where I'll use Ocaml to
implement some parts of game AI for a game, which itself is written in
plain C. I'm using CamlIDL to help interfacing between C and Ocaml.
Unfortunately I encountered problems, when I omitted some struct fields
from IDL specification. According the chapter 6 of CamlIDL manual
(http://caml.inria.fr/camlidl/htmlman/main006.html), omitting irrelevant
struct fields should be possible.
However, a following example doesn't work the way I think it should work.
In the C struct, three int fields x,y,z are defined. In IDL definition,
I omit y.
Program prints
x=1, y=3, z=134648512
althought I think it should print (of course y can be any number)
x=1, y=4911232, z=3
Have I misunderstood something ?
- c_impl.c: ---------------------------
#include <stdio.h>
struct bar {
int x;
int y;
int z;
};
void f (struct bar* pbar) {
printf ("x=%d, y=%d, z=%d\n", pbar->x, pbar->y, pbar->z);
return;
}
- c_idl.idl: ------------------------------
struct bar {
int x;
//int y;
int z;
};
void f ([in,ref] struct bar* pbar);
- idl_test.ml: ---------------------------
open C_idl
let main () =
let bar = {x = 1;
(*y = 2;*)
z = 3} in
f(bar)
let _ = main ()
--
Teemu Kurppa
Teemu.Kurppa@Helsinki.fi
-------------------
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next reply other threads:[~2001-08-27 6:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-08-27 6:48 T Teemu E Kurppa [this message]
2001-08-27 7:20 ` Dmitry Bely
2001-08-27 10:49 ` T Teemu E Kurppa
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