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+------------------------------------------------------------------------------
+-- --
+-- 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;