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From: jerry@jvdsys.stuyts.nl (Jerry van Dijk)
Subject: Re: Strange problem
Date: 1999/12/30
Message-ID: <946581540.11snx@jvdsys.stuyts.nl>#1/1
X-Deja-AN: 566591743
Distribution: world
References: <vhi3dsodsya.fsf@grotte.ifi.uio.no>
Organization: JerryWare
Reply-To: jerry@jvdsys.stuyts.nl
Newsgroups: comp.lang.ada
Date: 1999-12-30T00:00:00+00:00
List-Id: <comp.lang.ada>

In article <vhi3dsodsya.fsf@grotte.ifi.uio.no> jankr@nntp.ifi.uio.no writes:

>Why use words when you got code:

Ok. :-)

C:

        #include <stdio.h>

        void c_func (char *s, size_t len)
        {
                printf ("String: %s\n", s);
                printf ("Lenght: %d\n", len);
        }


Ada:

        with Interfaces.C.Strings;

        procedure Demo is

           package C  renames Interfaces.C;
           package CS renames Interfaces.C.Strings;

           procedure C_Func (s : CS.chars_ptr; len : C.size_t);
           pragma Import (C, C_Func, "c_func");

           Test_String : constant String := "Hello, world!";

           Str_Len : C.size_t     := 0;
           Str_Ptr : CS.chars_ptr := CS.Null_Ptr;

        begin

           Str_Ptr := CS.New_String (Test_String);
           Str_Len := CS.Strlen (Str_Ptr);

           C_Func (Str_Ptr, Str_Len);

           CS.Free (Str_Ptr);

        end Demo;

--
--  Jerry van Dijk  | email: jdijk@acm.org
--  Team-Ada        | www:   stad.dsl.nl/~jvandyk
--  Paris, France   | Leiden, Holland