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
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . D I R E C T O R I E S . V A L I D I T Y --
-- --
-- B o d y --
-- (Windows Version) --
-- --
-- Copyright (C) 2004-2009, 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 3, 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- This is the Windows version of this package
with Ada.Characters.Latin_1; use Ada.Characters.Latin_1;
package body Ada.Directories.Validity is
Invalid_Character : constant array (Character) of Boolean :=
(NUL .. US | '\' => True,
'/' | ':' | '*' | '?' => True,
'"' | '<' | '>' | '|' => True,
DEL .. NBSP => True,
others => False);
---------------------------------
-- Is_Path_Name_Case_Sensitive --
---------------------------------
function Is_Path_Name_Case_Sensitive return Boolean is
begin
return False;
end Is_Path_Name_Case_Sensitive;
------------------------
-- Is_Valid_Path_Name --
------------------------
function Is_Valid_Path_Name (Name : String) return Boolean is
Start : Positive := Name'First;
Last : Natural;
begin
-- A path name cannot be empty, cannot contain more than 256 characters,
-- cannot contain invalid characters and each directory/file name need
-- to be valid.
if Name'Length = 0 or else Name'Length > 256 then
return False;
else
-- A drive letter may be specified at the beginning
if Name'Length >= 2
and then Name (Start + 1) = ':'
and then
(Name (Start) in 'A' .. 'Z' or else
Name (Start) in 'a' .. 'z')
then
Start := Start + 2;
-- A drive letter followed by a colon and followed by nothing or
-- by a relative path is an ambiguous path name on Windows, so we
-- don't accept it.
if Start > Name'Last
or else (Name (Start) /= '/' and then Name (Start) /= '\')
then
return False;
end if;
end if;
loop
-- Look for the start of the next directory or file name
while Start <= Name'Last and then
(Name (Start) = '\' or Name (Start) = '/')
loop
Start := Start + 1;
end loop;
-- If all directories/file names are OK, return True
exit when Start > Name'Last;
Last := Start;
-- Look for the end of the directory/file name
while Last < Name'Last loop
exit when Name (Last + 1) = '\' or Name (Last + 1) = '/';
Last := Last + 1;
end loop;
-- Check if the directory/file name is valid
if not Is_Valid_Simple_Name (Name (Start .. Last)) then
return False;
end if;
-- Move to the next name
Start := Last + 1;
end loop;
end if;
-- If Name follows the rules, it is valid
return True;
end Is_Valid_Path_Name;
--------------------------
-- Is_Valid_Simple_Name --
--------------------------
function Is_Valid_Simple_Name (Name : String) return Boolean is
Only_Spaces : Boolean;
begin
-- A file name cannot be empty, cannot contain more than 256 characters,
-- and cannot contain invalid characters.
if Name'Length = 0 or else Name'Length > 256 then
return False;
-- Name length is OK
else
Only_Spaces := True;
for J in Name'Range loop
if Invalid_Character (Name (J)) then
return False;
elsif Name (J) /= ' ' then
Only_Spaces := False;
end if;
end loop;
-- If no invalid chars, and not all spaces, file name is valid
return not Only_Spaces;
end if;
end Is_Valid_Simple_Name;
-------------
-- OpenVMS --
-------------
function OpenVMS return Boolean is
begin
return False;
end OpenVMS;
-------------
-- Windows --
-------------
function Windows return Boolean is
begin
return True;
end Windows;
end Ada.Directories.Validity;
|
