1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
------------------------------------------------------------------------------
-- --
-- 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;
|
