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From: Jack Scheible <vze26j9s@mail.verizon.net>
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Subject: Re: Trying to pass strings to Fortan routines
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Date: Sun, 12 Aug 2001 15:28:38 GMT
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Date: 2001-08-12T15:28:38+00:00
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Hideous, but it works.
I don't like having to call a Fortran subroutine as though it were C, but it
works.

Thanks.

-jack

tmoran@acm.org wrote:

> > int main(){
> >   char filename[] = "test.out";
> >   char str[] = "Testing...";
> >   print_( filename, str, strlen(filename), strlen(str) );
> > }
>
>   Try:
>
> with Interfaces.C;
> procedure Main is
>
>   procedure C_Print(Filename, Str : access Interfaces.C.Char;
>                     Filename_Length, Str_Length: in Interfaces.C.Size_T);
>   pragma Import(C, C_Print, "print_");
>
>   procedure Print(Filename, Str : in String) is
>     C_Filename: Interfaces.C.Char_Array := Interfaces.C.To_C(Filename);
>     C_Str   : Interfaces.C.Char_Array := Interfaces.C.To_C(Str);
>   begin
>     C_Print(C_Filename(0)'Unchecked_Access, C_Str(0)'Unchecked_Access,
>       Interfaces.C.Size_T(Filename'Length), Interfaces.C.Size_T(Str'Length));
>   end Print;
>
> begin
>   Print("test.out", "Testing...");
> end Main;