------------------------------------------------------------------------------
--                                                                          --
--       G N U _ M U L T I P L E _ P R E C I S I O N . R . E X T R A S      --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--                            $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 Interfaces.C;
use type Interfaces.C.int;
use type Interfaces.C.size_t;

package body GNU_Multiple_Precision.R.Extras is

   function ">" (X, Y : Big_Float) return Boolean is
   begin
      return Compare (X, Y) > 0;
   end ">";

   function "<" (X, Y : Big_Float) return Boolean is
   begin
      return Compare (X, Y) < 0;
   end "<";

   function "<=" (X, Y : Big_Float) return Boolean is
   begin
      return Compare (X, Y) <= 0;
   end "<=";

   function ">=" (X, Y : Big_Float) return Boolean is
   begin
      return Compare (X, Y) >= 0;
   end ">=";

   function ">" (X : Big_Float; Y : Integer) return Boolean is
   begin
      return Compare (X, Interfaces.C.int (Y)) > 0;
   end ">";

   function "<" (X : Big_Float; Y : Integer) return Boolean is
   begin
      return Compare (X, Interfaces.C.int (Y)) < 0;
   end "<";

   function "<=" (X : Big_Float; Y : Integer) return Boolean is
   begin
      return Compare (X, Interfaces.C.int (Y)) <= 0;
   end "<=";

   function ">=" (X : Big_Float; Y : Integer) return Boolean is
   begin
      return Compare (X, Interfaces.C.int (Y)) >= 0;
   end ">=";

   function ">" (X : Integer; Y : Big_Float) return Boolean is
   begin
      return Compare (Y, Interfaces.C.int (X)) < 0;
   end ">";

   function "<" (X : Integer; Y : Big_Float) return Boolean is
   begin
      return Compare (Y, Interfaces.C.int (X)) > 0;
   end "<";

   function "<=" (X : Integer; Y : Big_Float) return Boolean is
   begin
      return Compare (Y, Interfaces.C.int (X)) >= 0;
   end "<=";

   function ">=" (X : Integer; Y : Big_Float) return Boolean is
   begin
      return Compare (Y, Interfaces.C.int (X)) <= 0;
   end ">=";

   procedure Set_String (Rop : in out Big_Float; 
                         Str : in String;
                         Base : in Positive := 10) is
   begin
      Set_C_String (Rop, Interfaces.C.To_C (Str), Interfaces.C.int (Base));
   end Set_String;

   function To_String (Op : Big_Float; Base : Positive := 10)
      return String is

      Ptr : System.Address;
      Buff : Interfaces.C.char_array (0 .. 10);
      --  At the moment, only allow 10 digits of precision on output
      Exponent : Interfaces.C.int;

   begin
      Get_C_String (Ptr, Buff'Address, Exponent, Interfaces.C.int (Base),
         Buff'Length - 2, Op);
      declare
         Exponent_String : String := Interfaces.C.int'Image (Exponent - 1);
      begin
         if Op < 0 then
            return Interfaces.C.To_Ada (Buff (0 .. 1), False) & "." &
               Interfaces.C.To_Ada (Buff (2 .. Buff'Last)) &
               "E" & Exponent_String (Exponent_String'First + 1 ..
               Exponent_String'Last); 
         else
            return Interfaces.C.To_Ada (Buff (0 .. 0), False) & "." &
               Interfaces.C.To_Ada (Buff (1 .. Buff'Last)) &
               "E" & Exponent_String (Exponent_String'First + 1 ..
               Exponent_String'Last); 
         end if;
      end;
   end To_String;

end GNU_Multiple_Precision.R.Extras;