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From: Lutz Donnerhacke <lutz@iks-jena.de>
Newsgroups: comp.lang.ada
Subject: Re: Making ada (types) "visable" in C
Date: Thu, 27 Jan 2005 13:36:38 +0000 (UTC)
Organization: IKS GmbH Jena
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Date: 2005-01-27T13:36:38+00:00
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* Sebastian wrote:
> ------------------------------------------------------------
> ADA side:
>
>    type State_Buff is (Ok, Failed);
>  
>    type Baud_Type is (R9600, R19200); 
>
>    type Parity_Type is (None, Odd, Even); 
>
>    type Stop_Bit_Type is (One, Two); 
>         
>    Initialize (
>       Baudrate  : in Baud_Type; 
>       Parity    : in Parity_Type;
>       Stop_Bits : in Stop_Bit_Type;
>       Status    : out State_Buff);
>
>    pragma Export(C, Initialize, "MyInitializeInC");

     pragma Export(C, Ok, "state_ok");
     pragma Export(C, Failed, "state_failed");
     ...
     pragma Export(C, Two, "stop_bit_two");

> ------------------------------------------------------------

> C side:

extern void MyInitializeInC (int baudrate, int parity, int stop_bits,
       	    		     int * state);

BTW:
    function Initialize (Baudrate ...) return State_Buff;
becomes
    extern int MyInitializeInC (int baudrate, int parity, int stop_bits);