Subversion Repositories openrisc

------------------------------------------------------------------------------

--                                                                          --

--                         GNAT RUN-TIME COMPONENTS                         --

--                                                                          --

--                       S Y S T E M . W C H _ W T S                        --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--          Copyright (C) 1992-2009, 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.      --

--                                                                          --

------------------------------------------------------------------------------

--  This package contains the routine used to convert wide strings and wide

--  wide strings to strings for use by wide and wide wide character attributes

--  (value, image etc.) and also by the numeric IO subpackages of

--  Ada.Text_IO.Wide_Text_IO and Ada.Text_IO.Wide_Wide_Text_IO.

with System.WCh_Con;

package System.WCh_WtS is

   pragma Pure;

   function Wide_String_To_String

     (S  : Wide_String;

      EM : System.WCh_Con.WC_Encoding_Method) return String;

   --  This routine simply takes its argument and converts it to a string,

   --  using the internal compiler escape sequence convention (defined in

   --  package Widechar) to translate characters that are out of range

   --  of type String. In the context of the Wide_Value attribute, the

   --  argument is the original attribute argument, and the result is used

   --  in a call to the corresponding Value attribute function. If the method

   --  for encoding is a shift-in, shift-out convention, then it is assumed

   --  that normal (non-wide character) mode holds at the start and end of

   --  the result string. EM indicates the wide character encoding method.

   --  Note: in the WCEM_Brackets case, we only use the brackets encoding

   --  for characters greater than 16#FF#. The lowest index of the returned

   --  String is equal to S'First.

   function Wide_Wide_String_To_String

     (S  : Wide_Wide_String;

      EM : System.WCh_Con.WC_Encoding_Method) return String;

   --  Same processing, except for Wide_Wide_String

end System.WCh_WtS;