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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [a-dirval-mingw.adb] - Blame information for rev 706

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1 706 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT RUN-TIME COMPONENTS                         --
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--                                                                          --
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--             A D A . D I R E C T O R I E S . V A L I D I T Y              --
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--                                                                          --
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--                                 B o d y                                  --
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--                            (Windows Version)                             --
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--                                                                          --
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--          Copyright (C) 2004-2009, Free Software Foundation, Inc.         --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
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--                                                                          --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception,   --
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-- version 3.1, as published by the Free Software Foundation.               --
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--                                                                          --
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-- You should have received a copy of the GNU General Public License and    --
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-- a copy of the GCC Runtime Library Exception along with this program;     --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
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-- <http://www.gnu.org/licenses/>.                                          --
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--                                                                          --
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-- GNAT was originally developed  by the GNAT team at  New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc.      --
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--                                                                          --
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------------------------------------------------------------------------------
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--  This is the Windows version of this package
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with Ada.Characters.Latin_1; use Ada.Characters.Latin_1;
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package body Ada.Directories.Validity is
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   Invalid_Character : constant array (Character) of Boolean :=
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                         (NUL .. US | '\'       => True,
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                          '/' | ':' | '*' | '?' => True,
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                          '"' | '<' | '>' | '|' => True,
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                          DEL .. NBSP           => True,
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                          others                => False);
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   ---------------------------------
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   -- Is_Path_Name_Case_Sensitive --
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   ---------------------------------
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   function Is_Path_Name_Case_Sensitive return Boolean is
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   begin
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      return False;
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   end Is_Path_Name_Case_Sensitive;
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   ------------------------
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   -- Is_Valid_Path_Name --
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   ------------------------
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   function Is_Valid_Path_Name (Name : String) return Boolean is
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      Start : Positive := Name'First;
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      Last  : Natural;
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   begin
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      --  A path name cannot be empty, cannot contain more than 256 characters,
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      --  cannot contain invalid characters and each directory/file name need
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      --  to be valid.
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      if Name'Length = 0 or else Name'Length > 256 then
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         return False;
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      else
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         --  A drive letter may be specified at the beginning
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         if Name'Length >= 2
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           and then  Name (Start + 1) = ':'
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           and then
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            (Name (Start) in 'A' .. 'Z' or else
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             Name (Start) in 'a' .. 'z')
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         then
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            Start := Start + 2;
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            --  A drive letter followed by a colon and followed by nothing or
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            --  by a relative path is an ambiguous path name on Windows, so we
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            --  don't accept it.
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            if Start > Name'Last
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              or else (Name (Start) /= '/' and then Name (Start) /= '\')
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            then
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               return False;
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            end if;
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         end if;
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         loop
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            --  Look for the start of the next directory or file name
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            while Start <= Name'Last and then
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              (Name (Start) = '\' or Name (Start) = '/')
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            loop
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               Start := Start + 1;
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            end loop;
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            --  If all directories/file names are OK, return True
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            exit when Start > Name'Last;
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            Last := Start;
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            --  Look for the end of the directory/file name
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            while Last < Name'Last loop
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               exit when Name (Last + 1) = '\' or Name (Last + 1) = '/';
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               Last := Last + 1;
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            end loop;
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            --  Check if the directory/file name is valid
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            if not Is_Valid_Simple_Name (Name (Start .. Last)) then
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                  return False;
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            end if;
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            --  Move to the next name
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            Start := Last + 1;
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         end loop;
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      end if;
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      --  If Name follows the rules, it is valid
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      return True;
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   end Is_Valid_Path_Name;
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   --------------------------
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   -- Is_Valid_Simple_Name --
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   --------------------------
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   function Is_Valid_Simple_Name (Name : String) return Boolean is
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      Only_Spaces : Boolean;
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   begin
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      --  A file name cannot be empty, cannot contain more than 256 characters,
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      --  and cannot contain invalid characters.
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      if Name'Length = 0 or else Name'Length > 256 then
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         return False;
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      --  Name length is OK
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      else
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         Only_Spaces := True;
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         for J in Name'Range loop
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            if Invalid_Character (Name (J)) then
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               return False;
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            elsif Name (J) /= ' ' then
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               Only_Spaces := False;
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            end if;
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         end loop;
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         --  If no invalid chars, and not all spaces, file name is valid
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         return not Only_Spaces;
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      end if;
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   end Is_Valid_Simple_Name;
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   -------------
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   -- OpenVMS --
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   -------------
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   function OpenVMS return Boolean is
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   begin
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      return False;
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   end OpenVMS;
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   -------------
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   -- Windows --
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   -------------
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   function Windows return Boolean is
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   begin
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      return True;
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   end Windows;
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end Ada.Directories.Validity;

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