77 lines
4.4 KiB
Ada
77 lines
4.4 KiB
Ada
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------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- 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 --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This child package of Ada.Strings.Wide_Unbounded provides some specialized
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-- access functions which are intended to allow more efficient use of the
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-- facilities of Ada.Strings.Wide_Unbounded, particularly by other layered
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-- utilities.
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package Ada.Strings.Wide_Unbounded.Aux is
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pragma Preelaborate;
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subtype Big_Wide_String is Wide_String (Positive'Range);
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type Big_Wide_String_Access is access all Big_Wide_String;
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procedure Get_Wide_String
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(U : Unbounded_Wide_String;
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S : out Big_Wide_String_Access;
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L : out Natural);
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pragma Inline (Get_Wide_String);
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-- This procedure returns the internal string pointer used in the
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-- representation of an unbounded string as well as the actual current
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-- length (which may be less than S.all'Length because in general there
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-- can be extra space assigned). The characters of this string may be
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-- not be modified via the returned pointer, and are valid only as
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-- long as the original unbounded string is not accessed or modified.
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--
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-- This procedure is much more efficient than the use of To_Wide_String
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-- since it avoids the need to copy the string. The lower bound of the
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-- referenced string returned by this call is always one, so the actual
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-- string data is always accessible as S (1 .. L).
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procedure Set_Wide_String (UP : out Unbounded_Wide_String; S : Wide_String)
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renames Set_Unbounded_Wide_String;
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-- This function sets the string contents of the referenced unbounded
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-- string to the given string value. It is significantly more efficient
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-- than the use of To_Unbounded_Wide_String with an assignment, since it
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-- avoids the necessity of messing with finalization chains. The lower
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-- bound of the string S is not required to be one.
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procedure Set_Wide_String
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(UP : in out Unbounded_Wide_String;
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S : Wide_String_Access);
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pragma Inline (Set_Wide_String);
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-- This version of Set_Wide_String takes a string access value, rather
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-- than string. The lower bound of the string value is required to be one,
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-- and this requirement is not checked.
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end Ada.Strings.Wide_Unbounded.Aux;
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