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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . S T R I N G S . W I D E _ U N B O U N D E D . A U X --
-- --
-- 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 child package of Ada.Strings.Wide_Unbounded provides some specialized
-- access functions which are intended to allow more efficient use of the
-- facilities of Ada.Strings.Wide_Unbounded, particularly by other layered
-- utilities.
package Ada.Strings.Wide_Unbounded.Aux is
pragma Preelaborate;
subtype Big_Wide_String is Wide_String (Positive'Range);
type Big_Wide_String_Access is access all Big_Wide_String;
procedure Get_Wide_String
(U : Unbounded_Wide_String;
S : out Big_Wide_String_Access;
L : out Natural);
pragma Inline (Get_Wide_String);
-- This procedure returns the internal string pointer used in the
-- representation of an unbounded string as well as the actual current
-- length (which may be less than S.all'Length because in general there
-- can be extra space assigned). The characters of this string may be
-- not be modified via the returned pointer, and are valid only as
-- long as the original unbounded string is not accessed or modified.
--
-- This procedure is much more efficient than the use of To_Wide_String
-- since it avoids the need to copy the string. The lower bound of the
-- referenced string returned by this call is always one, so the actual
-- string data is always accessible as S (1 .. L).
procedure Set_Wide_String (UP : out Unbounded_Wide_String; S : Wide_String)
renames Set_Unbounded_Wide_String;
-- This function sets the string contents of the referenced unbounded
-- string to the given string value. It is significantly more efficient
-- than the use of To_Unbounded_Wide_String with an assignment, since it
-- avoids the necessity of messing with finalization chains. The lower
-- bound of the string S is not required to be one.
procedure Set_Wide_String
(UP : in out Unbounded_Wide_String;
S : Wide_String_Access);
pragma Inline (Set_Wide_String);
-- This version of Set_Wide_String takes a string access value, rather
-- than string. The lower bound of the string value is required to be one,
-- and this requirement is not checked.
end Ada.Strings.Wide_Unbounded.Aux;
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