------------------------------------------------------------------------------
--                                                                          --
--              G N U . M U L T I P L E _ P R E C I S I O N . R             --
--                                                                          --
--                                 S p e c                                  --
--                                                                          --
--                            $Revision: 1.1 $                              --
--                                                                          --
--                     Copyright (C) 1999 Michael Roe                       --
--                                                                          --
-- This is free software;  you can  redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 2,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
-- for  more details.  You should have  received  a copy of the GNU General --
-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
-- MA 02111-1307, USA.                                                      --
--                                                                          --
-- As a special exception,  if other files  instantiate  generics from this --
-- unit, or you link  this unit with other files  to produce an executable, --
-- this  unit  does not  by itself cause  the resulting  executable  to  be --
-- covered  by the  GNU  General  Public  License.  This exception does not --
-- however invalidate  any other reasons why  the executable file  might be --
-- covered by the  GNU Public License.                                      --
--                                                                          --
------------------------------------------------------------------------------

with System;
with Interfaces.C;

package GNU_Multiple_Precision.R is

   pragma Remote_Types (GNU_Multiple_Precision.R);

   pragma Linker_Options ("-lgmp");

   type Big_Float is limited private;

------------------------------------------------------------------------------
--                  Initialization and assignment                           --
------------------------------------------------------------------------------

   procedure Init (Rop : out Big_Float);
   pragma Import (C, Init, "mpf_init");

   procedure Init2 (Rop : out Big_Float; Precision : in Interfaces.C.unsigned);
   pragma Import (C, Init2, "mpf_init2");

   procedure Clear (Rop : in out Big_Float);
   pragma Import (C, Clear, "mpf_clear");

   --  The procedures for changing precision not yet done

   procedure Set (Rop : in out Big_Float; Op : in Big_Float);
   pragma Import (C, Set, "mpf_set");

   procedure Set_Unsigned (Rop : in out Big_Float;
                           Op : in Interfaces.C.unsigned);
   pragma Import (C, Set_Unsigned, "mpf_set_ui");

   procedure Set_Integer (Rop : in out Big_Float;
                           Op : in Interfaces.C.int);
   pragma Import (C, Set_Integer, "mpf_set_si");

   procedure Set_Double (Rop : in out Big_Float;
                         Op : in Interfaces.C.double);
   pragma Import (C, Set_Double, "mpf_set_d");

   procedure Set_C_String (Rop : in out Big_Float;
                           Str : in Interfaces.C.char_array;
                           Base : Interfaces.C.int);
   pragma Import (C, Set_C_String, "mpf_set_str");

------------------------------------------------------------------------------
--                         Conversion                                       --
------------------------------------------------------------------------------

   procedure Get_C_String (Out_Ptr : out System.Address;
                           In_Ptr : in System.Address;
                           Exponent : out Interfaces.C.int; -- HACK
                           Base : in Interfaces.C.int;
                           N_Digits : in Interfaces.C.size_t;
                           Op : in Big_Float);
   pragma Import (C, Get_C_String, "mpf_get_str");
   pragma Import_Valued_Procedure (Get_C_String);

------------------------------------------------------------------------------
--                          Comparison                                      --
------------------------------------------------------------------------------

    function Compare (Op1, Op2 : Big_Float) return Interfaces.C.int;
    pragma Import (C, Compare, "mpf_cmp");

   function Compare_Unsigned (Op1 : Big_Float; Op2 : Interfaces.C.unsigned)
      return Interfaces.C.int;
   pragma Import (C, Compare_Unsigned, "mpf_cmp_ui");

   function Compare_Integer (Op1 : Big_Float; Op2 : Interfaces.C.int)
      return Interfaces.C.int;
   pragma Import (C, Compare_Integer, "mpf_cmp_si");

   function Compare (Op1 : Big_Float; Op2 : Interfaces.C.int)
      return Interfaces.C.int renames Compare_Integer;

private

   type Big_Float is limited
      record
         Precision : Interfaces.C.int;
         Size : Interfaces.C.int;
         Exponent : Interfaces.C.int;
         Buffer : System.Address;
      end record;

end GNU_Multiple_Precision.R;