------------------------------------------------------------------------------ -- -- -- 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 -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2002, 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. -- -- -- ------------------------------------------------------------------------------ package body Ada.Strings.Unbounded.Aux is ---------------- -- Get_String -- ---------------- function Get_String (U : Unbounded_String) return String_Access is begin if U.Last = U.Reference'Length then return U.Reference; else declare type Unbounded_String_Access is access all Unbounded_String; U_Ptr : constant Unbounded_String_Access := U'Unrestricted_Access; -- Unbounded_String is a controlled type which is always passed -- by reference. It is always safe to take the pointer to such -- object here. This pointer is used to set the U.Reference -- value which would not be possible otherwise as U is read-only. Old : String_Access := U.Reference; Ret : String_Access; begin Ret := new String'(U.Reference (1 .. U.Last)); U_Ptr.Reference := Ret; Free (Old); return Ret; end; end if; end Get_String; ---------------- -- Set_String -- ---------------- procedure Set_String (UP : in out Unbounded_String; S : String) is begin if UP.Last = S'Length then UP.Reference.all := S; else declare subtype String_1 is String (1 .. S'Length); Tmp : String_Access; begin Tmp := new String'(String_1 (S)); Finalize (UP); UP.Reference := Tmp; UP.Last := UP.Reference'Length; end; end if; end Set_String; procedure Set_String (UP : in out Unbounded_String; S : String_Access) is begin Finalize (UP); UP.Reference := S; UP.Last := UP.Reference'Length; end Set_String; end Ada.Strings.Unbounded.Aux;