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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . W C H _ S T W --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2007, 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 2, 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. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- 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 strings to wide (wide)
-- strings for use by wide (wide) image attribute.
with System.WCh_Con;
package System.WCh_StW is
pragma Pure;
procedure String_To_Wide_String
(S : String;
R : out Wide_String;
L : out Natural;
EM : System.WCh_Con.WC_Encoding_Method);
-- This routine simply takes its argument and converts it to wide string
-- format, storing the result in R (1 .. L), with L being set appropriately
-- on return. The caller guarantees that R is long enough to accomodate the
-- result. This is used in the context of the Wide_Image attribute, where
-- the argument is the corresponding 'Image attribute. Any wide character
-- escape sequences in the string are converted to the corresponding wide
-- character value. No syntax checks are made, it is assumed that any such
-- sequences are validly formed (this must be assured by the caller), and
-- results from the fact that Wide_Image is only used on strings that have
-- been built by the compiler, such as images of enumeration literals. 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 argument string. EM indicates the wide character encoding method.
-- Note: in the WCEM_Brackets case, the brackets escape sequence is used
-- only for codes greater than 16#FF#.
procedure String_To_Wide_Wide_String
(S : String;
R : out Wide_Wide_String;
L : out Natural;
EM : System.WCh_Con.WC_Encoding_Method);
-- Same function with Wide_Wide_String output
end System.WCh_StW;
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