Aaru/Aaru.Images/D88/Structs.cs

// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename       : Structs.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Disk image plugins.
//
// --[ Description ] ----------------------------------------------------------
//
//     Contains structures for Quasi88 disk images.
//
// --[ 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 © 2011-2025 Natalia Portillo
// ****************************************************************************/

using System.Runtime.InteropServices;
using Aaru.Decoders.Floppy;

namespace Aaru.Images;

public sealed partial class D88
{
#region Nested type: Header

    [StructLayout(LayoutKind.Sequential, Pack = 1)]
    readonly struct Header
    {
        /// <summary>Disk name, nul-terminated ASCII ディスクの名前(ASCII + '\0')</summary>
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 17)]
        public readonly byte[] name;
        /// <summary>Reserved ディスクの名前(ASCII + '\0')</summary>
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 9)]
        public readonly byte[] reserved;
        /// <summary>Write protect status ライトプロテクト： 0x00 なし、0x10 あり</summary>
        public readonly byte write_protect;
        /// <summary>Disk type ディスクの種類： 0x00 2D、 0x10 2DD、 0x20 2HD</summary>
        public readonly DiskType disk_type;
        /// <summary>Disk image size ディスクのサイズ</summary>
        public readonly int disk_size;
        /// <summary>Track pointers トラック部のオフセットテーブル 0 Track ～ 163 Track</summary>
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 164)]
        public readonly int[] track_table;
    }

#endregion

#region Nested type: SectorHeader

    [StructLayout(LayoutKind.Sequential, Pack = 1)]
    readonly struct SectorHeader
    {
        /// <summary>Cylinder ID の C</summary>
        public readonly byte c;
        /// <summary>Head ID の H</summary>
        public readonly byte h;
        /// <summary>Sector number ID の R</summary>
        public readonly byte r;
        /// <summary>Sector size ID の N</summary>
        public readonly IBMSectorSizeCode n;
        /// <summary>Number of sectors in this track このトラック内に存在するセクタの数</summary>
        public readonly short spt;
        /// <summary>Density: 0x00 MFM, 0x40 FM 記録密度： 0x00 倍密度、0x40 単密度</summary>
        public readonly DensityType density;
        /// <summary>Deleted sector, 0x00 not deleted, 0x10 deleted DELETED MARK： 0x00 ノーマル、 0x10 DELETED</summary>
        public readonly byte deleted_mark;
        /// <summary>Sector status ステータス</summary>
        public readonly byte status;
        /// <summary>Reserved リザーブ</summary>
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
        public readonly byte[] reserved;
        /// <summary>Size of data following this field このセクタ部のデータサイズ</summary>
        public readonly short size_of_data;
    }

#endregion
}