1 ------------------------------------------------------------------------------
3 -- GNAT RUNTIME COMPONENTS --
5 -- A D A . S T R I N G S . U N B O U N D E D . A U X --
9 -- Copyright (C) 1992-2002, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 package body Ada
.Strings
.Unbounded
.Aux
is
40 function Get_String
(U
: Unbounded_String
) return String_Access
is
42 if U
.Last
= U
.Reference
'Length then
47 type Unbounded_String_Access
is access all Unbounded_String
;
49 U_Ptr
: constant Unbounded_String_Access
:= U
'Unrestricted_Access;
50 -- Unbounded_String is a controlled type which is always passed
51 -- by reference. It is always safe to take the pointer to such
52 -- object here. This pointer is used to set the U.Reference
53 -- value which would not be possible otherwise as U is read-only.
55 Old
: String_Access
:= U
.Reference
;
59 Ret
:= new String'(U.Reference (1 .. U.Last));
60 U_Ptr.Reference := Ret;
71 procedure Set_String (UP : in out Unbounded_String; S : String) is
73 if UP.Last = S'Length then
74 UP.Reference.all := S;
78 subtype String_1 is String (1 .. S'Length);
82 Tmp := new String'(String_1
(S
));
85 UP
.Last
:= UP
.Reference
'Length;
90 procedure Set_String
(UP
: in out Unbounded_String
; S
: String_Access
) is
94 UP
.Last
:= UP
.Reference
'Length;
97 end Ada
.Strings
.Unbounded
.Aux
;