| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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 -- |
| -- (VMS Version) -- |
| -- -- |
| -- Copyright (C) 2004-2005 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, 51 Franklin Street, Fifth Floor, -- |
| -- Boston, MA 02110-1301, 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. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This is the OpenVMS version of this package |
| |
| package body Ada.Directories.Validity is |
| |
| Max_Number_Of_Characters : constant := 39; |
| Max_Path_Length : constant := 1_024; |
| |
| Invalid_Character : constant array (Character) of Boolean := |
| ('a' .. 'z' => False, |
| 'A' .. 'Z' => False, |
| '_' | '$' | '-' | '.' => False, |
| others => True); |
| |
| --------------------------------- |
| -- 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 |
| First : Positive := Name'First; |
| Last : Positive; |
| Dot_Found : Boolean := False; |
| |
| begin |
| -- A valid path (directory) name cannot be empty, and cannot contain |
| -- more than 1024 characters. Directories can be ".", ".." or be simple |
| -- name without extensions. |
| |
| if Name'Length = 0 or else Name'Length > Max_Path_Length then |
| return False; |
| |
| else |
| loop |
| -- Look for the start of the next directory or file name |
| |
| while First <= Name'Last and then Name (First) = '/' loop |
| First := First + 1; |
| end loop; |
| |
| -- If all directories/file names are OK, return True |
| |
| exit when First > Name'Last; |
| |
| Last := First; |
| Dot_Found := False; |
| |
| -- Look for the end of the directory/file name |
| |
| while Last < Name'Last loop |
| exit when Name (Last + 1) = '/'; |
| Last := Last + 1; |
| |
| if Name (Last) = '.' then |
| Dot_Found := True; |
| end if; |
| end loop; |
| |
| -- If name include a dot, it can only be ".", ".." or a the last |
| -- file name. |
| |
| if Dot_Found then |
| if Name (First .. Last) /= "." and then |
| Name (First .. Last) /= ".." |
| then |
| return Last = Name'Last |
| and then Is_Valid_Simple_Name (Name (First .. Last)); |
| |
| end if; |
| |
| -- Check if the directory/file name is valid |
| |
| elsif not Is_Valid_Simple_Name (Name (First .. Last)) then |
| return False; |
| end if; |
| |
| -- Move to the next name |
| |
| First := Last + 1; |
| end loop; |
| end if; |
| |
| -- If Name follows the rules, then it is valid |
| |
| return True; |
| end Is_Valid_Path_Name; |
| |
| -------------------------- |
| -- Is_Valid_Simple_Name -- |
| -------------------------- |
| |
| function Is_Valid_Simple_Name (Name : String) return Boolean is |
| In_Extension : Boolean := False; |
| Number_Of_Characters : Natural := 0; |
| |
| begin |
| -- A file name cannot be empty, and cannot have more than 39 characters |
| -- before or after a single '.'. |
| |
| if Name'Length = 0 then |
| return False; |
| |
| else |
| -- Check each character for validity |
| |
| for J in Name'Range loop |
| if Invalid_Character (Name (J)) then |
| return False; |
| |
| elsif Name (J) = '.' then |
| |
| -- Name cannot contain several dots |
| |
| if In_Extension then |
| return False; |
| |
| else |
| -- Reset the number of characters to count the characters |
| -- of the extension. |
| |
| In_Extension := True; |
| Number_Of_Characters := 0; |
| end if; |
| |
| else |
| -- Check that the number of character is not too large |
| |
| Number_Of_Characters := Number_Of_Characters + 1; |
| |
| if Number_Of_Characters > Max_Number_Of_Characters then |
| return False; |
| end if; |
| end if; |
| end loop; |
| end if; |
| |
| -- If the rules are followed, then it is valid |
| |
| return True; |
| end Is_Valid_Simple_Name; |
| |
| ------------- |
| -- OpenVMS -- |
| ------------- |
| |
| function OpenVMS return Boolean is |
| begin |
| return True; |
| end OpenVMS; |
| |
| end Ada.Directories.Validity; |
