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) 1992-2003, 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- -- 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. -- 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 34with System.Img_Char; use System.Img_Char; 35with System.WCh_Con; use System.WCh_Con; 36with System.WCh_WtS; use System.WCh_WtS; 37 38package body System.Img_WChar is 39 40 -------------------------- 41 -- Image_Wide_Character -- 42 -------------------------- 43 44 function Image_Wide_Character 45 (V : Wide_Character; 46 EM : WC_Encoding_Method) 47 return String 48 is 49 Val : constant Natural := Wide_Character'Pos (V); 50 WS : Wide_String (1 .. 3); 51 52 begin 53 -- If in range of standard character, use standard character routine 54 55 if Val < 16#80# 56 or else (Val <= 16#FF# 57 and then EM not in WC_Upper_Half_Encoding_Method) 58 then 59 return Image_Character (Character'Val (Val)); 60 61 -- if the value is one of the last two characters in the type, use 62 -- their language-defined names (3.5.2(3)). 63 64 elsif Val = 16#FFFE# then 65 return "FFFE"; 66 67 elsif Val = 16#FFFF# then 68 return "FFFF"; 69 70 -- Otherwise return an appropriate escape sequence (i.e. one matching 71 -- the convention implemented by Scn.Wide_Char). The easiest thing is 72 -- to build a wide string for the result, and then use the Wide_Value 73 -- function to build the resulting String. 74 75 else 76 WS (1) := '''; 77 WS (2) := V; 78 WS (3) := '''; 79 80 return Wide_String_To_String (WS, EM); 81 end if; 82 83 end Image_Wide_Character; 84 85end System.Img_WChar; 86