Re: Calling C's fopen from Ada (Aonix compiler)

["David Botton" <David@Botton.com>]

No, char_array will be passed as a char*.

David Botton

----- Original Message -----
From: "Gerhard H�ring" <gerhard.nospam@bigfoot.de>


> I think the error is that you used Char_Array where Interfaces.C.Chars_Ptr
> should be used. So the compiler passes the arguments to fopen in by-value
> instead of by-reference mode. IMO, an interface to fopen should be
something
> like:

<CLIP>

>
> Gerhard H�ring
>
> On Mon, 11 Dec 2000 19:15:52 -0600, Wayne Magor <none@nowhere.com> wrote:
> >I need to call a C procedure which requires a file pointer (the file
> >must be opened by
> >the caller).  So I want to call C's fopen from Ada (I'm using the Aonix
> >Ada compiler on
> >Windows NT).
> >
> >This causes an access error exception in the program that requires the
> >file pointer, however,
> [snip]
> >  package C renames Interfaces.C;
> >
> >  F : File_Ptr;
> >
> [snip]
> >  function fopen (Name : in C.Char_Array;
> >                  Mode : in C.Char_Array) return File_Ptr;
> >  pragma Import (C, fopen, "fopen");