1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- A D A . D I R E C T O R I E S . V A L I D I T Y --
8 -- (Windows Version) --
10 -- Copyright (C) 2004-2009, Free Software Foundation, Inc. --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 3, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. --
19 -- As a special exception under Section 7 of GPL version 3, you are granted --
20 -- additional permissions described in the GCC Runtime Library Exception, --
21 -- version 3.1, as published by the Free Software Foundation. --
23 -- You should have received a copy of the GNU General Public License and --
24 -- a copy of the GCC Runtime Library Exception along with this program; --
25 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
26 -- <http://www.gnu.org/licenses/>. --
28 -- GNAT was originally developed by the GNAT team at New York University. --
29 -- Extensive contributions were provided by Ada Core Technologies Inc. --
31 ------------------------------------------------------------------------------
33 -- This is the Windows version of this package
35 with Ada.Characters.Latin_1; use Ada.Characters.Latin_1;
37 package body Ada.Directories.Validity is
39 Invalid_Character : constant array (Character) of Boolean :=
40 (NUL .. US | '\' => True,
41 '/' | ':' | '*' | '?' => True,
42 '"' | '<' | '>' | '|' => True,
46 ---------------------------------
47 -- Is_Path_Name_Case_Sensitive --
48 ---------------------------------
50 function Is_Path_Name_Case_Sensitive return Boolean is
53 end Is_Path_Name_Case_Sensitive;
55 ------------------------
56 -- Is_Valid_Path_Name --
57 ------------------------
59 function Is_Valid_Path_Name (Name : String) return Boolean is
60 Start : Positive := Name'First;
64 -- A path name cannot be empty, cannot contain more than 256 characters,
65 -- cannot contain invalid characters and each directory/file name need
68 if Name'Length = 0 or else Name'Length > 256 then
72 -- A drive letter may be specified at the beginning
75 and then Name (Start + 1) = ':'
77 (Name (Start) in 'A' .. 'Z' or else
78 Name (Start) in 'a' .. 'z')
82 -- A drive letter followed by a colon and followed by nothing or
83 -- by a relative path is an ambiguous path name on Windows, so we
87 or else (Name (Start) /= '/' and then Name (Start) /= '\')
94 -- Look for the start of the next directory or file name
96 while Start <= Name'Last and then
97 (Name (Start) = '\' or Name (Start) = '/')
102 -- If all directories/file names are OK, return True
104 exit when Start > Name'Last;
108 -- Look for the end of the directory/file name
110 while Last < Name'Last loop
111 exit when Name (Last + 1) = '\' or Name (Last + 1) = '/';
115 -- Check if the directory/file name is valid
117 if not Is_Valid_Simple_Name (Name (Start .. Last)) then
121 -- Move to the next name
127 -- If Name follows the rules, it is valid
130 end Is_Valid_Path_Name;
132 --------------------------
133 -- Is_Valid_Simple_Name --
134 --------------------------
136 function Is_Valid_Simple_Name (Name : String) return Boolean is
137 Only_Spaces : Boolean;
140 -- A file name cannot be empty, cannot contain more than 256 characters,
141 -- and cannot contain invalid characters.
143 if Name'Length = 0 or else Name'Length > 256 then
150 for J in Name'Range loop
151 if Invalid_Character (Name (J)) then
153 elsif Name (J) /= ' ' then
154 Only_Spaces := False;
158 -- If no invalid chars, and not all spaces, file name is valid
160 return not Only_Spaces;
162 end Is_Valid_Simple_Name;
168 function OpenVMS return Boolean is
177 function Windows return Boolean is
182 end Ada.Directories.Validity;