s-imgwch.adb   [plain text]


------------------------------------------------------------------------------
--                                                                          --
--                         GNAT RUN-TIME COMPONENTS                         --
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------------------------------------------------------------------------------

with Interfaces; use Interfaces;

with System.Img_Char; use System.Img_Char;

package body System.Img_WChar is

   --------------------------
   -- Image_Wide_Character --
   --------------------------

   function Image_Wide_Character
     (V        : Wide_Character;
      Ada_2005 : Boolean) return String
   is
   begin
      --  Annoying Ada 95 incompatibility with FFFE/FFFF

      if V >= Wide_Character'Val (16#FFFE#)
        and then not Ada_2005
      then
         if V = Wide_Character'Val (16#FFFE#) then
            return "FFFE";
         else
            return "FFFF";
         end if;
      end if;

      --  Normal case, same as Wide_Wide_Character

      return
        Image_Wide_Wide_Character
          (Wide_Wide_Character'Val (Wide_Character'Pos (V)));
   end Image_Wide_Character;

   -------------------------------
   -- Image_Wide_Wide_Character --
   -------------------------------

   function Image_Wide_Wide_Character
     (V : Wide_Wide_Character) return String
   is
      Val : Unsigned_32 := Wide_Wide_Character'Pos (V);

   begin
      --  If in range of standard Character, use Character routine

      if Val <= 16#FF# then
         return Image_Character (Character'Val (Wide_Wide_Character'Pos (V)));

      --  Otherwise value returned is Hex_hhhhhhhh

      else
         declare
            Result : String (1 .. 12) := "Hex_hhhhhhhh";
            Hex    : constant array (Unsigned_32 range 0 .. 15) of Character :=
                       "0123456789ABCDEF";

         begin
            for J in reverse 5 .. 12 loop
               Result (J) := Hex (Val mod 16);
               Val := Val / 16;
            end loop;

            return Result;
         end;
      end if;
   end Image_Wide_Wide_Character;

end System.Img_WChar;