15f0f591b8
2012-10-01 Arnaud Charlet <charlet@adacore.com> * a-catizo.adb, a-stwiun.adb, a-cdlili.adb, a-cihama.adb, a-direct.adb, a-coinve.adb, a-calend.adb, a-ciorse.adb, a-coorma.adb, a-cfdlli.adb, a-stzunb-shared.adb, a-cfhase.adb, bindgen.adb, ceinfo.adb, a-tags.adb, einfo.adb, checks.adb, eval_fat.adb, a-cborma.adb, a-stwifi.adb, a-tifiio.adb, a-textio.adb, a-cidlli.adb, a-strunb-shared.adb, a-cimutr.adb, a-calcon.adb, a-exexpr-gcc.adb, a-ciormu.adb, a-stzunb.adb, a-stzsea.adb, a-ngelfu.adb, a-stzfix.adb, a-cihase.adb, a-cohama.adb, a-exetim-posix.adb, a-dirval-vms.adb, a-caldel-vms.adb, a-coorse.adb, errout.adb, a-except.adb, butil.adb, a-dirval-mingw.adb, a-cforma.adb, a-except-2005.adb, a-wtedit.adb, cstand.adb, a-stwiun-shared.adb, a-cbhama.adb, a-direio.adb, clean.adb, a-cborse.adb, back_end.adb, binde.adb, a-exexda.adb, a-comutr.adb, a-ciorma.adb, a-cobove.adb, a-coormu.adb, a-teioed.adb, a-convec.adb, a-wtenau.adb, exp_aggr.adb, a-ztedit.adb, a-cohase.adb, a-exetim-mingw.adb, bcheck.adb, a-dynpri.adb, a-cfhama.adb, a-calfor.adb, a-cbdlli.adb, a-crdlli.adb, a-cbmutr.adb, a-sequio.adb, a-ngcoar.adb, a-cforse.adb, a-strunb.adb, a-calend-vms.adb, a-clrefi.adb, a-cofove.adb, a-ztenau.adb, a-strfix.adb, a-cbhase.adb, a-stzsup.adb: Minor reformatting. From-SVN: r191905
201 lines
6.7 KiB
Ada
201 lines
6.7 KiB
Ada
------------------------------------------------------------------------------
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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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-- (VMS Version) --
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-- --
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-- Copyright (C) 2004-2012, 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 OpenVMS version of this package
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package body Ada.Directories.Validity is
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Max_Number_Of_Characters : constant := 39;
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Max_Path_Length : constant := 1_024;
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Invalid_Character : constant array (Character) of Boolean :=
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('a' .. 'z' => False,
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'A' .. 'Z' => False,
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'0' .. '9' => False,
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'_' | '$' | '-' | '.' => False,
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others => True);
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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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First : Positive := Name'First;
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Last : Positive;
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Dot_Found : Boolean := False;
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begin
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-- A valid path (directory) name cannot be empty, and cannot contain
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-- more than 1024 characters. Directories can be ".", ".." or be simple
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-- name without extensions.
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if Name'Length = 0 or else Name'Length > Max_Path_Length then
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return False;
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else
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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 First <= Name'Last and then Name (First) = '/' loop
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First := First + 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 First > Name'Last;
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Last := First;
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Dot_Found := False;
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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) = '/';
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Last := Last + 1;
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if Name (Last) = '.' then
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Dot_Found := True;
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end if;
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end loop;
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-- If name include a dot, it can only be ".", ".." or the last
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-- file name.
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if Dot_Found then
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if Name (First .. Last) /= "." and then
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Name (First .. Last) /= ".."
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then
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return Last = Name'Last
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and then Is_Valid_Simple_Name (Name (First .. Last));
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end if;
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-- Check if the directory/file name is valid
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elsif not Is_Valid_Simple_Name (Name (First .. 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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First := Last + 1;
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end loop;
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end if;
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-- If Name follows the rules, then 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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In_Extension : Boolean := False;
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Number_Of_Characters : Natural := 0;
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begin
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-- A file name cannot be empty, and cannot have more than 39 characters
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-- before or after a single '.'.
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if Name'Length = 0 then
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return False;
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else
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-- Check each character for validity
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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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-- Name cannot contain several dots
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if In_Extension then
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return False;
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else
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-- Reset the number of characters to count the characters
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-- of the extension.
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In_Extension := True;
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Number_Of_Characters := 0;
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end if;
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else
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-- Check that the number of character is not too large
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Number_Of_Characters := Number_Of_Characters + 1;
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if Number_Of_Characters > Max_Number_Of_Characters then
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return False;
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end if;
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end if;
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end loop;
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end if;
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-- If the rules are followed, then it is valid
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return True;
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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 True;
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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 False;
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end Windows;
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end Ada.Directories.Validity;
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