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------------------------------------------------------------------------------
-- --
-- GNAT RUNTIME COMPONENTS --
-- --
-- A D A . S T R I N G S . U N B O U N D E D . A U X --
-- --
-- S p e c --
-- --
-- --
-- Copyright (C) 1992-1998, 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, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, 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 child package of Ada.Strings.Unbounded provides some specialized
-- access functions which are intended to allow more efficient use of the
-- facilities of Ada.Strings.Unbounded, particularly by other layered
-- utilities (such as GNAT.Patterns).
package Ada.Strings.Unbounded.Aux is
pragma Preelaborate (Aux);
function Get_String (U : Unbounded_String) return String_Access;
pragma Inline (Get_String);
-- This function returns the internal string pointer used in the
-- representation of an unbounded string. There is no copy involved,
-- so the value obtained references the same string as the original
-- unbounded string. The characters of this string may not be modified
-- via the returned pointer, and are valid only as long as the original
-- unbounded string is not modified. Violating either of these two
-- rules results in erroneous execution.
--
-- This function is much more efficient than the use of To_String
-- since it avoids the need to copy the string. The lower bound of the
-- referenced string returned by this call is always one.
procedure Set_String (UP : in out Unbounded_String; S : String);
pragma Inline (Set_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_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_String (UP : in out Unbounded_String; S : String_Access);
pragma Inline (Set_String);
-- This version of Set_String takes a string access value, rather than a
-- string. The lower bound of the string value is required to be one, and
-- this requirement is not checked.
end Ada.Strings.Unbounded.Aux;
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