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                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2007, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
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  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  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 --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  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    procedure Image_Wide_Character
  45      (V        : Wide_Character;
  46       S        : in out String;
  47       P        : out Natural;
  48       Ada_2005 : Boolean)
  49    is
  50       pragma Assert (S'First = 1);
  51
  52    begin
  53       --  Annoying Ada 95 incompatibility with FFFE/FFFF
  54
  55       if V >= Wide_Character'Val (16#FFFE#)
  56         and then not Ada_2005
  57       then
  58          if V = Wide_Character'Val (16#FFFE#) then
  59             S (1 .. 4) := "FFFE";
  60          else
  61             S (1 .. 4) := "FFFF";
  62          end if;
  63
  64          P := 4;
  65
  66       --  Normal case, same as Wide_Wide_Character
  67
  68       else
  69          Image_Wide_Wide_Character
  70            (Wide_Wide_Character'Val (Wide_Character'Pos (V)), S, P);
  71       end if;
  72    end Image_Wide_Character;
  73
  74    -------------------------------
  75    -- Image_Wide_Wide_Character --
  76    -------------------------------
  77
  78    procedure Image_Wide_Wide_Character
  79      (V : Wide_Wide_Character;
  80       S : in out String;
  81       P : out Natural)
  82    is
  83       pragma Assert (S'First = 1);
  84
  85       Val : Unsigned_32 := Wide_Wide_Character'Pos (V);
  86
  87    begin
  88       --  If in range of standard Character, use Character routine
  89
  90       if Val <= 16#FF# then
  91          Image_Character (Character'Val (Wide_Wide_Character'Pos (V)), S, P);
  92
  93       --  Otherwise value returned is Hex_hhhhhhhh
  94
  95       else
  96          declare
  97             Hex : constant array (Unsigned_32 range 0 .. 15) of Character :=
  98                     "0123456789ABCDEF";
  99
 100          begin
 101             S (1 .. 4) := "Hex_";
 102
 103             for J in reverse 5 .. 12 loop
 104                S (J) := Hex (Val mod 16);
 105                Val := Val / 16;
 106             end loop;
 107
 108             P := 12;
 109          end;
 110       end if;
 111    end Image_Wide_Wide_Character;
 112
 113 end System.Img_WChar;