From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Original-To: caml-list@yquem.inria.fr Delivered-To: caml-list@yquem.inria.fr Received: from nez-perce.inria.fr (nez-perce.inria.fr [192.93.2.78]) by yquem.inria.fr (Postfix) with ESMTP id CE0E6BB9C for ; Thu, 19 Jan 2006 15:24:59 +0100 (CET) Received: from pauillac.inria.fr (pauillac.inria.fr [128.93.11.35]) by nez-perce.inria.fr (8.13.0/8.13.0) with ESMTP id k0JEOxYK002271 for ; Thu, 19 Jan 2006 15:24:59 +0100 Received: from nez-perce.inria.fr (nez-perce.inria.fr [192.93.2.78]) by pauillac.inria.fr (8.7.6/8.7.3) with ESMTP id PAA06839 for ; Thu, 19 Jan 2006 15:24:58 +0100 (MET) Received: from mail.physik.uni-muenchen.de (mail.physik.uni-muenchen.de [192.54.42.129]) by nez-perce.inria.fr (8.13.0/8.13.0) with ESMTP id k0JEOwYA002264 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL); Thu, 19 Jan 2006 15:24:58 +0100 Received: from localhost (unknown [127.0.0.1]) by mail.physik.uni-muenchen.de (Postfix) with ESMTP id 1845520021; Thu, 19 Jan 2006 15:24:58 +0100 (CET) Received: from mail.physik.uni-muenchen.de ([127.0.0.1]) by localhost (mail.physik.uni-muenchen.de [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 17205-01-3; Thu, 19 Jan 2006 15:24:58 +0100 (CET) Received: from mailhost.cip.physik.uni-muenchen.de (kaiser.cip.physik.uni-muenchen.de [141.84.136.1]) by mail.physik.uni-muenchen.de (Postfix) with ESMTP id F2DD420004; Thu, 19 Jan 2006 15:24:57 +0100 (CET) Received: from aso.cip.physik.uni-muenchen.de (guffert.cip.physik.uni-muenchen.de [141.84.136.24]) by mailhost.cip.physik.uni-muenchen.de (Postfix) with ESMTP id F0D1426E87; Thu, 19 Jan 2006 15:24:56 +0100 (CET) Received: by aso.cip.physik.uni-muenchen.de (Postfix, from userid 3092) id 20861783F3; Thu, 19 Jan 2006 15:24:57 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by aso.cip.physik.uni-muenchen.de (Postfix) with ESMTP id 1A14B80432; Thu, 19 Jan 2006 15:24:57 +0100 (CET) Date: Thu, 19 Jan 2006 15:24:57 +0100 (CET) From: Thomas Fischbacher To: Damien Doligez Cc: caml users Subject: Re: [Caml-list] C interface style question In-Reply-To: <02FDC6F0-122C-42BA-A2F4-15E2B08248C8@inria.fr> Message-ID: References: <20060119.093955.97297811.garrigue@math.nagoya-u.ac.jp> <1137640656.8943.183.camel@rosella> <02FDC6F0-122C-42BA-A2F4-15E2B08248C8@inria.fr> X-BOFH: Daemons did it MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Virus-Scanned: amavisd-new at physik.uni-muenchen.de X-Miltered: at nez-perce with ID 43CFA13B.000 by Joe's j-chkmail (http://j-chkmail.ensmp.fr)! X-Miltered: at nez-perce with ID 43CFA13A.001 by Joe's j-chkmail (http://j-chkmail.ensmp.fr)! X-Spam: no; 0.00; caml-list:01 damien:01 val:01 ocaml:01 bigarray:01 cip:98 cip:98 lambda:01 lambda:01 wrote:01 doligez:01 data:02 debian:02 parameter:02 output:02 X-Spam-Checker-Version: SpamAssassin 3.0.3 (2005-04-27) on yquem.inria.fr X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=none autolearn=disabled version=3.0.3 On Thu, 19 Jan 2006, Damien Doligez wrote: > > StoreField(v,n,(value)(void*)p); > > This is the only way. Always use Store_field, Store_double_field, > and Store_double_val. One more question about this: can I interface a C function in such a way that it uses an OCaml float array to store its output data, i.e. pass &(Double_field(ml_output,0)) as a double* "output parameter"? Of course, I could always go through a bigarray, or use intermediate storage. But is there a direct way to do this? -- regards, tf@cip.physik.uni-muenchen.de (o_ Thomas Fischbacher - http://www.cip.physik.uni-muenchen.de/~tf //\ (lambda (n) ((lambda (p q r) (p p q r)) (lambda (g x y) V_/_ (if (= x 0) y (g g (- x 1) (* x y)))) n 1)) (Debian GNU)