File : g-casuti.adb

------------------------------------------------------------------------------
--                                                                          --
--                         GNAT RUNTIME COMPONENTS                          --
--                                                                          --
--                       G N A T . C A S E _ U T I L                        --
--                                                                          --
--                                 B o d y                                  --
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--                            $Revision: 1.4 $                              --
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--           Copyright (C) 1995-1999 Ada Core Technologies, Inc.            --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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------------------------------------------------------------------------------

package body GNAT.Case_Util is

   --------------
   -- To_Lower --
   --------------

   function To_Lower (A : Character) return Character is
      A_Val : constant Natural := Character'Pos (A);

   begin
      if A in 'A' .. 'Z'
        or else A_Val in 16#C0# .. 16#D6#
        or else A_Val in 16#D8# .. 16#DE#
      then
         return Character'Val (A_Val + 16#20#);
      else
         return A;
      end if;
   end To_Lower;

   procedure To_Lower (A : in out String) is
   begin
      for J in A'Range loop
         A (J) := To_Lower (A (J));
      end loop;
   end To_Lower;

   --------------
   -- To_Mixed --
   --------------

   procedure To_Mixed (A : in out String) is
      Ucase : Boolean := True;

   begin
      for J in A'Range loop
         if Ucase then
            A (J) := To_Upper (A (J));
         else
            A (J) := To_Lower (A (J));
         end if;

         Ucase := A (J) = '_';
      end loop;
   end To_Mixed;

   --------------
   -- To_Upper --
   --------------

   function To_Upper (A : Character) return Character is
      A_Val : constant Natural := Character'Pos (A);

   begin
      if A in 'a' .. 'z'
        or else A_Val in 16#E0# .. 16#F6#
        or else A_Val in 16#F8# .. 16#FE#
      then
         return Character'Val (A_Val - 16#20#);
      else
         return A;
      end if;
   end To_Upper;

   procedure To_Upper (A : in out String) is
   begin
      for J in A'Range loop
         A (J) := To_Upper (A (J));
      end loop;
   end To_Upper;

end GNAT.Case_Util;