------------------------->  GNU Sather - sourcefile  <-------------------------
-- Copyright (C) 1995 by International Computer Science Institute            --
-- This file is part of the GNU Sather library. It is free software; you may --
-- redistribute  and/or modify it under the terms of the GNU Library General --
-- Public  License (LGPL)  as published  by the  Free  Software  Foundation; --
-- either version 2 of the license, or (at your option) any later version.   --
-- This  library  is distributed  in the  hope that it will  be  useful, but --
-- WITHOUT ANY WARRANTY without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See Doc/LGPL for more details.       --
-- The license text is also available from:  Free Software Foundation, Inc., --
-- 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA                     --
-------------->  Please email comments to <bug-sather@gnu.org>  <--------------

-- ANSI C interface - universal (void *) pointer type
-- Author: Benedict A. Gomes <gomes@samosa.ICSI.Berkeley.EDU>

immutable class C_PTR is
   -- A pointer to void in C (void*)
   -- Pointer arithmetic is missing for C pointer types. Feel free to
   -- add it if it becomes necessary
   include COMPARABLE;

   zero:SAME is builtin C_PTR_ZERO; end;
   is_eq(p:SAME):BOOL is builtin C_PTR_IS_EQ; end;   
   
end;
-------------------------------------------------------------------
partial class C_PTR_CONVERT is
   -- Partial class that implements conversions to and from C_PTR 
   -- i.e. (void *)
   
   create(vptr:C_PTR):SAME is
      -- create from void*
      -- Convert (i.e. cast) "vptr" to be of the type of SAME
      builtin CONVERT_FROM_C_PTR_CREATE_C_PTR;
   end;

   c_ptr:C_PTR is
      -- Convert (i.e. cast) this pointer to be of type C_PTR
      builtin CONVERT_TO_C_PTR;
   end;
   
end;
-------------------------------------------------------------------
immutable class C_SIZE_T is
   -- Corresponds to size_t
end;
-------------------------------------------------------------------
immutable class C_PTRDIFF_T is
   -- Corresponds to ptrdiff_t
end;
-------------------------------------------------------------------
