| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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 copy 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; |
| |
| begin |
| U_Ptr.Reference := new String'(U.Reference (1 .. U.Last)); |
| Free (Old); |
| return U.Reference; |
| 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; |
