1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- S Y S T E M . I M G _ W C H A R --
9 -- Copyright (C) 1992-2005, Free Software Foundation, Inc. --
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- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
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. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 with Interfaces; use Interfaces;
36 with System.Img_Char; use System.Img_Char;
37 with System.WCh_Con; use System.WCh_Con;
38 with System.WCh_WtS; use System.WCh_WtS;
40 package body System.Img_WChar is
42 --------------------------
43 -- Image_Wide_Character --
44 --------------------------
46 function Image_Wide_Character
48 EM : WC_Encoding_Method) return String
50 Val : constant Unsigned_16 := Wide_Character'Pos (V);
51 WS : Wide_String (1 .. 3);
54 -- If in range of standard character, use standard character routine
57 or else (Val <= 16#FF#
58 and then EM not in WC_Upper_Half_Encoding_Method)
60 return Image_Character (Character'Val (Val));
62 -- if the value is one of the last two characters in the type, use
63 -- their language-defined names (3.5.2(3)).
65 elsif Val = 16#FFFE# then
68 elsif Val = 16#FFFF# then
71 -- Otherwise return an appropriate escape sequence (i.e. one matching
72 -- the convention implemented by Scn.Wide_Char). The easiest thing is
73 -- to build a wide string for the result, and then use the Wide_Value
74 -- function to build the resulting String.
81 return Wide_String_To_String (WS, EM);
83 end Image_Wide_Character;
85 -------------------------------
86 -- Image_Wide_Wide_Character --
87 -------------------------------
89 function Image_Wide_Wide_Character
90 (V : Wide_Wide_Character;
91 EM : WC_Encoding_Method) return String
93 Val : constant Unsigned_32 := Wide_Wide_Character'Pos (V);
94 WS : Wide_Wide_String (1 .. 3);
97 -- If in range of standard Wide_Character, then we use the
98 -- Wide_Character routine
100 if Val <= 16#FFFF# then
101 return Image_Wide_Character (Wide_Character'Val (Val), EM);
103 -- Otherwise return an appropriate escape sequence (i.e. one matching
104 -- the convention implemented by Scn.Wide_Wide_Char). The easiest thing
105 -- is to build a wide string for the result, and then use the
106 -- Wide_Wide_Value function to build the resulting String.
113 return Wide_Wide_String_To_String (WS, EM);
115 end Image_Wide_Wide_Character;
117 end System.Img_WChar;