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Diffstat (limited to 'gcc/ada/a-dirval-mingw.adb')
| -rw-r--r-- | gcc/ada/a-dirval-mingw.adb | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/gcc/ada/a-dirval-mingw.adb b/gcc/ada/a-dirval-mingw.adb new file mode 100644 index 00000000000..a20ff177973 --- /dev/null +++ b/gcc/ada/a-dirval-mingw.adb @@ -0,0 +1,146 @@ +------------------------------------------------------------------------------ +-- -- +-- 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 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, 59 Temple Place - Suite 330, Boston, -- +-- MA 02111-1307, 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 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_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; + end if; + + loop + -- Look for the start of the next directory or file name + + while Start <= Name'Last and then 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) = '\'; + 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, including '\' + + 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)) or else 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; + +end Ada.Directories.Validity; + |