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 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 2, 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. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNAT was originally developed by the GNAT team at New York University. --
31 -- Extensive contributions were provided by Ada Core Technologies Inc. --
33 ------------------------------------------------------------------------------
35 -- This is the Windows version of this package
37 with Ada.Characters.Latin_1; use Ada.Characters.Latin_1;
39 package body Ada.Directories.Validity is
41 Invalid_Character : constant array (Character) of Boolean :=
43 '/' | ':' | '*' | '?' => True,
44 '"' | '<' | '>' | '|' => True,
48 ------------------------
49 -- Is_Valid_Path_Name --
50 ------------------------
52 function Is_Valid_Path_Name (Name : String) return Boolean is
53 Start : Positive := Name'First;
57 -- A path name cannot be empty, cannot contain more than 256 characters,
58 -- cannot contain invalid characters and each directory/file name need
61 if Name'Length = 0 or else Name'Length > 256 then
65 -- A drive letter may be specified at the beginning
68 and then Name (Start + 1) = ':'
70 (Name (Start) in 'A' .. 'Z' or else
71 Name (Start) in 'a' .. 'z')
77 -- Look for the start of the next directory or file name
79 while Start <= Name'Last and then Name (Start) = '\' loop
83 -- If all directories/file names are OK, return True
85 exit when Start > Name'Last;
89 -- Look for the end of the directory/file name
91 while Last < Name'Last loop
92 exit when Name (Last + 1) = '\';
96 -- Check if the directory/file name is valid
98 if not Is_Valid_Simple_Name (Name (Start .. Last)) then
102 -- Move to the next name
108 -- If Name follows the rules, it is valid
111 end Is_Valid_Path_Name;
113 --------------------------
114 -- Is_Valid_Simple_Name --
115 --------------------------
117 function Is_Valid_Simple_Name (Name : String) return Boolean is
118 Only_Spaces : Boolean;
121 -- A file name cannot be empty, cannot contain more than 256 characters,
122 -- and cannot contain invalid characters, including '\'
124 if Name'Length = 0 or else Name'Length > 256 then
131 for J in Name'Range loop
132 if Invalid_Character (Name (J)) or else Name (J) = '\' then
134 elsif Name (J) /= ' ' then
135 Only_Spaces := False;
139 -- If no invalid chars, and not all spaces, file name is valid.
141 return not Only_Spaces;
143 end Is_Valid_Simple_Name;
145 end Ada.Directories.Validity;