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+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME COMPONENTS --
+-- --
+-- A D A . C H A R A C T E R S . C O N V E R S I O N S --
+-- --
+-- B o d y --
+-- --
+-- Copyright (C) 2005-2012, Free Software Foundation, Inc. --
+-- --
+-- GNAT is free software; you can redistribute it and/or modify it under --
+-- terms of the GNU General Public License as published by the Free Soft- --
+-- ware Foundation; either version 3, or (at your option) any later ver- --
+-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
+-- --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
+-- --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
+-- --
+------------------------------------------------------------------------------
+
+package body Ada.Characters.Conversions is
+
+ ------------------
+ -- Is_Character --
+ ------------------
+
+ function Is_Character (Item : Wide_Character) return Boolean is
+ begin
+ return Wide_Character'Pos (Item) < 256;
+ end Is_Character;
+
+ function Is_Character (Item : Wide_Wide_Character) return Boolean is
+ begin
+ return Wide_Wide_Character'Pos (Item) < 256;
+ end Is_Character;
+
+ ---------------
+ -- Is_String --
+ ---------------
+
+ function Is_String (Item : Wide_String) return Boolean is
+ begin
+ for J in Item'Range loop
+ if Wide_Character'Pos (Item (J)) >= 256 then
+ return False;
+ end if;
+ end loop;
+
+ return True;
+ end Is_String;
+
+ function Is_String (Item : Wide_Wide_String) return Boolean is
+ begin
+ for J in Item'Range loop
+ if Wide_Wide_Character'Pos (Item (J)) >= 256 then
+ return False;
+ end if;
+ end loop;
+
+ return True;
+ end Is_String;
+
+ -----------------------
+ -- Is_Wide_Character --
+ -----------------------
+
+ function Is_Wide_Character (Item : Wide_Wide_Character) return Boolean is
+ begin
+ return Wide_Wide_Character'Pos (Item) < 2**16;
+ end Is_Wide_Character;
+
+ --------------------
+ -- Is_Wide_String --
+ --------------------
+
+ function Is_Wide_String (Item : Wide_Wide_String) return Boolean is
+ begin
+ for J in Item'Range loop
+ if Wide_Wide_Character'Pos (Item (J)) >= 2**16 then
+ return False;
+ end if;
+ end loop;
+
+ return True;
+ end Is_Wide_String;
+
+ ------------------
+ -- To_Character --
+ ------------------
+
+ function To_Character
+ (Item : Wide_Character;
+ Substitute : Character := ' ') return Character
+ is
+ begin
+ if Is_Character (Item) then
+ return Character'Val (Wide_Character'Pos (Item));
+ else
+ return Substitute;
+ end if;
+ end To_Character;
+
+ function To_Character
+ (Item : Wide_Wide_Character;
+ Substitute : Character := ' ') return Character
+ is
+ begin
+ if Is_Character (Item) then
+ return Character'Val (Wide_Wide_Character'Pos (Item));
+ else
+ return Substitute;
+ end if;
+ end To_Character;
+
+ ---------------
+ -- To_String --
+ ---------------
+
+ function To_String
+ (Item : Wide_String;
+ Substitute : Character := ' ') return String
+ is
+ Result : String (1 .. Item'Length);
+
+ begin
+ for J in Item'Range loop
+ Result (J - (Item'First - 1)) := To_Character (Item (J), Substitute);
+ end loop;
+
+ return Result;
+ end To_String;
+
+ function To_String
+ (Item : Wide_Wide_String;
+ Substitute : Character := ' ') return String
+ is
+ Result : String (1 .. Item'Length);
+
+ begin
+ for J in Item'Range loop
+ Result (J - (Item'First - 1)) := To_Character (Item (J), Substitute);
+ end loop;
+
+ return Result;
+ end To_String;
+
+ -----------------------
+ -- To_Wide_Character --
+ -----------------------
+
+ function To_Wide_Character
+ (Item : Character) return Wide_Character
+ is
+ begin
+ return Wide_Character'Val (Character'Pos (Item));
+ end To_Wide_Character;
+
+ function To_Wide_Character
+ (Item : Wide_Wide_Character;
+ Substitute : Wide_Character := ' ') return Wide_Character
+ is
+ begin
+ if Wide_Wide_Character'Pos (Item) < 2**16 then
+ return Wide_Character'Val (Wide_Wide_Character'Pos (Item));
+ else
+ return Substitute;
+ end if;
+ end To_Wide_Character;
+
+ --------------------
+ -- To_Wide_String --
+ --------------------
+
+ function To_Wide_String
+ (Item : String) return Wide_String
+ is
+ Result : Wide_String (1 .. Item'Length);
+
+ begin
+ for J in Item'Range loop
+ Result (J - (Item'First - 1)) := To_Wide_Character (Item (J));
+ end loop;
+
+ return Result;
+ end To_Wide_String;
+
+ function To_Wide_String
+ (Item : Wide_Wide_String;
+ Substitute : Wide_Character := ' ') return Wide_String
+ is
+ Result : Wide_String (1 .. Item'Length);
+
+ begin
+ for J in Item'Range loop
+ Result (J - (Item'First - 1)) :=
+ To_Wide_Character (Item (J), Substitute);
+ end loop;
+
+ return Result;
+ end To_Wide_String;
+
+ ----------------------------
+ -- To_Wide_Wide_Character --
+ ----------------------------
+
+ function To_Wide_Wide_Character
+ (Item : Character) return Wide_Wide_Character
+ is
+ begin
+ return Wide_Wide_Character'Val (Character'Pos (Item));
+ end To_Wide_Wide_Character;
+
+ function To_Wide_Wide_Character
+ (Item : Wide_Character) return Wide_Wide_Character
+ is
+ begin
+ return Wide_Wide_Character'Val (Wide_Character'Pos (Item));
+ end To_Wide_Wide_Character;
+
+ -------------------------
+ -- To_Wide_Wide_String --
+ -------------------------
+
+ function To_Wide_Wide_String
+ (Item : String) return Wide_Wide_String
+ is
+ Result : Wide_Wide_String (1 .. Item'Length);
+
+ begin
+ for J in Item'Range loop
+ Result (J - (Item'First - 1)) := To_Wide_Wide_Character (Item (J));
+ end loop;
+
+ return Result;
+ end To_Wide_Wide_String;
+
+ function To_Wide_Wide_String
+ (Item : Wide_String) return Wide_Wide_String
+ is
+ Result : Wide_Wide_String (1 .. Item'Length);
+
+ begin
+ for J in Item'Range loop
+ Result (J - (Item'First - 1)) := To_Wide_Wide_Character (Item (J));
+ end loop;
+
+ return Result;
+ end To_Wide_Wide_String;
+
+end Ada.Characters.Conversions;