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-------------------------------------------------------------------------------
-- (C) Altran Praxis Limited
-------------------------------------------------------------------------------
--
-- The SPARK toolset is free software; you can redistribute it and/or modify it
-- under terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 3, or (at your option) any later
-- version. The SPARK toolset is distributed in the hope that it will be
-- useful, but WITHOUT 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 the SPARK toolset; see file
-- COPYING3. If not, go to http://www.gnu.org/licenses for a complete copy of
-- the license.
--
--=============================================================================
--------------------------------------------------------------------------------
--Synopsis: --
-- --
--Package providing a structure in which to store file details, in the form --
--of a full pathname (without extension) and a type, either PlainFile or --
--directory. --
-- --
--To be used in tandem with the Heap data structure, hence the use of --
--Heap.Atom as the array range --
--------------------------------------------------------------------------------
with E_Strings, HeapIndex;
use type E_Strings.Order_Types;
use type HeapIndex.IndexType;
--# inherit E_Strings,
--# HeapIndex,
--# OSFiling;
package FileDetails is
--ListLength : constant Integer := 20000;
--type IndexType is range 0 .. ListLength;
type FileTypes is (PlainFile, Directory, Invalid);
type DataType is private;
--------------------------------------------------------------------------
procedure Add
(Details : in out DataType;
Index : out HeapIndex.IndexType;
Success : out Boolean;
Name : in E_Strings.T;
FileType : in FileTypes);
--# derives Details from *,
--# FileType,
--# Name &
--# Index,
--# Success from Details;
--------------------------------------------------------------------------
procedure Initialize (Details : out DataType);
--# derives Details from ;
--------------------------------------------------------------------------
procedure MarkDirectoryResolved (Details : in out DataType;
Index : in HeapIndex.IndexType);
--# derives Details from *,
--# Index;
--------------------------------------------------------------------------
-- this compares the information given and returns
-- Result is as defined in section 5.4 of the specification
-- it works directly on values rather than on indices into the Details
-- structure so that information can be compared before insertion
-- NOTE : the procedure is successful iff neither Type is Invalid
--
procedure Order
(FirstName : in E_Strings.T;
FirstType : in FileTypes;
SecondName : in E_Strings.T;
SecondType : in FileTypes;
Success : out Boolean;
Result : out E_Strings.Order_Types);
--# derives Result from FirstName,
--# FirstType,
--# SecondName,
--# SecondType &
--# Success from FirstType,
--# SecondType;
--------------------------------------------------------------------------
procedure Retrieve
(Details : in DataType;
Index : in HeapIndex.IndexType;
Success : out Boolean;
Name : out E_Strings.T;
FileType : out FileTypes;
DirectoryIsResolved : out Boolean);
--# derives DirectoryIsResolved,
--# FileType,
--# Name,
--# Success from Details,
--# Index;
private
type DetailsElement is record
Name : E_Strings.T;
FileType : FileTypes;
DirectoryIsResolved : Boolean;
end record;
NullDetailsElement : constant DetailsElement :=
DetailsElement'(Name => E_Strings.Empty_String,
FileType => Invalid,
DirectoryIsResolved => False);
type ElementsArray is array (HeapIndex.IndexType) of DetailsElement;
-- HighMark is the number of the highest allocated atom - zero if the
-- structure is empty
type DataType is record
Details : ElementsArray;
HighMark : HeapIndex.IndexType;
end record;
end FileDetails;
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