gcc/ada/s-imgwch.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                     S Y S T E M . I M G _ W C H A R                      --
   6 --                                                                          --
   7 --                                 B o d y                                  --
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  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
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  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 with Interfaces; use Interfaces;
  35
  36 with System.Img_Char; use System.Img_Char;
  37
  38 package body System.Img_WChar is
  39
  40    --------------------------
  41    -- Image_Wide_Character --
  42    --------------------------
  43
  44    function Image_Wide_Character
  45      (V        : Wide_Character;
  46       Ada_2005 : Boolean) return String
  47    is
  48    begin
  49       --  Annoying Ada 95 incompatibility with FFFE/FFFF
  50
  51       if V >= Wide_Character'Val (16#FFFE#)
  52         and then not Ada_2005
  53       then
  54          if V = Wide_Character'Val (16#FFFE#) then
  55             return "FFFE";
  56          else
  57             return "FFFF";
  58          end if;
  59       end if;
  60
  61       --  Normal case, same as Wide_Wide_Character
  62
  63       return
  64         Image_Wide_Wide_Character
  65           (Wide_Wide_Character'Val (Wide_Character'Pos (V)));
  66    end Image_Wide_Character;
  67
  68    -------------------------------
  69    -- Image_Wide_Wide_Character --
  70    -------------------------------
  71
  72    function Image_Wide_Wide_Character
  73      (V : Wide_Wide_Character) return String
  74    is
  75       Val : Unsigned_32 := Wide_Wide_Character'Pos (V);
  76
  77    begin
  78       --  If in range of standard Character, use Character routine
  79
  80       if Val <= 16#FF# then
  81          return Image_Character (Character'Val (Wide_Wide_Character'Pos (V)));
  82
  83       --  Otherwise value returned is Hex_hhhhhhhh
  84
  85       else
  86          declare
  87             Result : String (1 .. 12) := "Hex_hhhhhhhh";
  88             Hex    : constant array (Unsigned_32 range 0 .. 15) of Character :=
  89                        "0123456789ABCDEF";
  90
  91          begin
  92             for J in reverse 5 .. 12 loop
  93                Result (J) := Hex (Val mod 16);
  94                Val := Val / 16;
  95             end loop;
  96
  97             return Result;
  98          end;
  99       end if;
 100    end Image_Wide_Wide_Character;
 101
 102 end System.Img_WChar;