Aaru/DiscImageChef.Filesystems/LisaFS/Consts.cs

// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename       : Consts.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Apple Lisa filesystem plugin.
//
// --[ Description ] ----------------------------------------------------------
//
//     Apple Lisa filesystem constants.
//
// --[ License ] --------------------------------------------------------------
//
//     This library is free software; you can redistribute it and/or modify
//     it under the terms of the GNU Lesser General Public License as
//     published by the Free Software Foundation; either version 2.1 of the
//     License, or (at your option) any later version.
//
//     This library 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
//     Lesser General Public License for more details.
//
//     You should have received a copy of the GNU Lesser General Public
//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2019 Natalia Portillo
// ****************************************************************************/

namespace DiscImageChef.Filesystems.LisaFS
{
    public partial class LisaFS
    {
        /// <summary>
        ///     Lisa FS v1, from Lisa OS 1.0 (Workshop or Office)
        ///     Never seen on Sony floppies.
        /// </summary>
        const byte LISA_V1 = 0x0E;
        /// <summary>
        ///     Lisa FS v2, from Lisa OS 2.0 (Workshop or Office)
        ///     Contrary to what most information online says the only difference with V1
        ///     is the Extents File size. Catalog format is the same
        /// </summary>
        const byte LISA_V2 = 0x0F;
        /// <summary>
        ///     Lisa FS v3, from Lisa OS 3.0 (Workshop or Office)
        ///     Adds support for user catalogs (aka subdirectories),
        ///     and changes the catalog format from extents to double-linked list.
        ///     Uses '-' as path separator (so people that created Lisa/FILE.TEXT just
        ///     created a file named like that :p)
        /// </summary>
        const byte LISA_V3 = 0x11;
        /// <summary>Maximum string size in LisaFS</summary>
        const uint E_NAME = 32;
        /// <summary>
        ///     Unused file ID
        /// </summary>
        const ushort FILEID_FREE = 0x0000;
        /// <summary>
        ///     Used by the boot blocks
        /// </summary>
        const ushort FILEID_BOOT = 0xAAAA;
        /// <summary>
        ///     Used by the operating system loader blocks
        /// </summary>
        const ushort FILEID_LOADER = 0xBBBB;
        /// <summary>
        ///     Used by the MDDF
        /// </summary>
        const ushort FILEID_MDDF = 0x0001;
        /// <summary>
        ///     Used by the volume bitmap, sits between MDDF and S-Records file.
        /// </summary>
        const ushort FILEID_BITMAP = 0x0002;
        /// <summary>
        ///     S-Records file
        /// </summary>
        const ushort FILEID_SRECORD = 0x0003;
        /// <summary>The root catalog</summary>
        const ushort FILEID_CATALOG = 0x0004;
        const short FILEID_BOOT_SIGNED   = -21846;
        const short FILEID_LOADER_SIGNED = -17477;
        /// <summary>
        ///     A file that has been erased
        /// </summary>
        const ushort FILEID_ERASED = 0x7FFF;
        const ushort FILEID_MAX = FILEID_ERASED;

        /// <summary>Root directory ID</summary>
        const short DIRID_ROOT = 0;

        enum FileType : byte
        {
            /// <summary>
            ///     Undefined file type
            /// </summary>
            Undefined = 0,
            /// <summary>
            ///     MDDF
            /// </summary>
            MDDFile = 1,
            /// <summary>
            ///     Root catalog
            /// </summary>
            RootCat = 2,
            /// <summary>
            ///     Bitmap
            /// </summary>
            FreeList = 3,
            /// <summary>
            ///     Unknown, maybe refers to the S-Records File?
            /// </summary>
            BadBlocks = 4,
            /// <summary>
            ///     System data
            /// </summary>
            SysData = 5,
            /// <summary>
            ///     Printer spool
            /// </summary>
            Spool = 6,
            /// <summary>
            ///     Executable. Yet application files don't use it
            /// </summary>
            Exec = 7,
            /// <summary>
            ///     User catalog
            /// </summary>
            UserCat = 8,
            /// <summary>
            ///     Pipe. Not seen on disk.
            /// </summary>
            Pipe = 9,
            /// <summary>
            ///     Boot file?
            /// </summary>
            BootFile = 10,
            /// <summary>
            ///     Swap for data
            /// </summary>
            SwapData = 11,
            /// <summary>
            ///     Swap for code
            /// </summary>
            SwapCode = 12,
            /// <summary>
            ///     Unknown
            /// </summary>
            RamAP = 13,
            /// <summary>
            ///     Any file
            /// </summary>
            UserFile = 14,
            /// <summary>
            ///     Erased?
            /// </summary>
            KilledObject = 15
        }
    }
}