1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT RUNTIME COMPONENTS                          --
4--                                                                          --
5--                       S Y S T E M . W C H _ W T S                        --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--          Copyright (C) 1992-1998 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
34--  This package contains the routine used to convert wide strings to
35--  strings for use by wide character attributes (value, image etc.) and
36--  also by the numeric IO subpackages of Ada.Text_IO.Wide_Text_IO.
37
38with System.WCh_Con;
39
40package System.WCh_WtS is
41pragma Pure (WCh_WtS);
42
43   function Wide_String_To_String
44     (S    : Wide_String;
45      EM   : System.WCh_Con.WC_Encoding_Method)
46      return String;
47   --  This routine simply takes its argument and converts it to a string,
48   --  using the internal compiler escape sequence convention (defined in
49   --  package Widechar) to translate characters that are out of range
50   --  of type String. In the context of the Wide_Value attribute, the
51   --  argument is the original attribute argument, and the result is used
52   --  in a call to the corresponding Value attribute function. If the method
53   --  for encoding is a shift-in, shift-out convention, then it is assumed
54   --  that normal (non-wide character) mode holds at the start and end of
55   --  the result string. EM indicates the wide character encoding method.
56   --  Note: in the WCEM_Brackets case, we only use the brackets encoding
57   --  for characters greater than 16#FF#.
58
59end System.WCh_WtS;
60