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Merge pull request #4 from sjefvanleeuwen/master
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Lemonade File Magnetic Storage Specifications
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@dmitry-pavlov
dmitry-pavlov authored Apr 2, 2021
2 parents 0936364 + a26d3c3 commit f96ce10
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4 changes: 4 additions & 0 deletions src/AudioCassetteBackup/AudioCassetteBackup.csproj
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<TargetFramework>net5.0</TargetFramework>
</PropertyGroup>

<ItemGroup>
<PackageReference Include="KaitaiStruct.Runtime.CSharp" Version="0.9.0" />
</ItemGroup>

</Project>
261 changes: 261 additions & 0 deletions src/AudioCassetteBackup/Storage/LemonadeFile.cs
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using Kaitai;
using System.Collections.Generic;

namespace AudioCassetteBackup.Storage
{
/// <summary>
/// A lemonade file stores blocks of data as if they are written to magnetic
/// tape. Contents of this file can be viewed as a very
/// simple linear filesystem, storing named files with some basic
/// meta information prepended as a header.
/// </summary>
/// <remarks>
/// Reference: <a href="https://github.com/dmitry-pavlov/audio-cassette-backup">Source</a>
/// </remarks>
public partial class LemonadeFile : KaitaiStruct
{
public static LemonadeFile FromFile(string fileName)
{
return new LemonadeFile(new KaitaiStream(fileName));
}


public enum FlagEnum
{
Header = 0,
Data = 255,
}

public enum HeaderTypeEnum
{
Program = 0,
NumArray = 1,
CharArray = 2,
Bytes = 3,
}
public LemonadeFile(KaitaiStream p__io, KaitaiStruct p__parent = null, LemonadeFile p__root = null) : base(p__io)
{
m_parent = p__parent;
m_root = p__root ?? this;
_read();
}
private void _read()
{
_blocks = new List<Block>();
{
var i = 0;
while (!m_io.IsEof)
{
_blocks.Add(new Block(m_io, this, m_root));
i++;
}
}
}
public partial class Block : KaitaiStruct
{
public static Block FromFile(string fileName)
{
return new Block(new KaitaiStream(fileName));
}

public Block(KaitaiStream p__io, LemonadeFile p__parent = null, LemonadeFile p__root = null) : base(p__io)
{
m_parent = p__parent;
m_root = p__root;
_read();
}
private void _read()
{
_lenBlock = m_io.ReadU2le();
_flag = ((LemonadeFile.FlagEnum)m_io.ReadU1());
if (((LenBlock == 19) && (Flag == LemonadeFile.FlagEnum.Header)))
{
_header = new Header(m_io, this, m_root);
}
if (LenBlock == 19)
{
_data = m_io.ReadBytes((Header.LenData + 4));
}
if (Flag == LemonadeFile.FlagEnum.Data)
{
_headerlessData = m_io.ReadBytes((LenBlock - 1));
}
}
private ushort _lenBlock;
private FlagEnum _flag;
private Header _header;
private byte[] _data;
private byte[] _headerlessData;
private LemonadeFile m_root;
private LemonadeFile m_parent;
public ushort LenBlock { get { return _lenBlock; } }
public FlagEnum Flag { get { return _flag; } }
public Header Header { get { return _header; } }
public byte[] Data { get { return _data; } }
public byte[] HeaderlessData { get { return _headerlessData; } }
public LemonadeFile M_Root { get { return m_root; } }
public LemonadeFile M_Parent { get { return m_parent; } }
}
public partial class ProgramParams : KaitaiStruct
{
public static ProgramParams FromFile(string fileName)
{
return new ProgramParams(new KaitaiStream(fileName));
}

public ProgramParams(KaitaiStream p__io, LemonadeFile.Header p__parent = null, LemonadeFile p__root = null) : base(p__io)
{
m_parent = p__parent;
m_root = p__root;
_read();
}
private void _read()
{
_autostartLine = m_io.ReadU2le();
_lenProgram = m_io.ReadU2le();
}
private ushort _autostartLine;
private ushort _lenProgram;
private LemonadeFile m_root;
private LemonadeFile.Header m_parent;
public ushort AutostartLine { get { return _autostartLine; } }
public ushort LenProgram { get { return _lenProgram; } }
public LemonadeFile M_Root { get { return m_root; } }
public LemonadeFile.Header M_Parent { get { return m_parent; } }
}
public partial class BytesParams : KaitaiStruct
{
public static BytesParams FromFile(string fileName)
{
return new BytesParams(new KaitaiStream(fileName));
}

public BytesParams(KaitaiStream p__io, LemonadeFile.Header p__parent = null, LemonadeFile p__root = null) : base(p__io)
{
m_parent = p__parent;
m_root = p__root;
_read();
}
private void _read()
{
_startAddress = m_io.ReadU2le();
_reserved = m_io.ReadBytes(2);
}
private ushort _startAddress;
private byte[] _reserved;
private LemonadeFile m_root;
private LemonadeFile.Header m_parent;
public ushort StartAddress { get { return _startAddress; } }
public byte[] Reserved { get { return _reserved; } }
public LemonadeFile M_Root { get { return m_root; } }
public LemonadeFile.Header M_Parent { get { return m_parent; } }
}
public partial class Header : KaitaiStruct
{
public static Header FromFile(string fileName)
{
return new Header(new KaitaiStream(fileName));
}

public Header(KaitaiStream p__io, LemonadeFile.Block p__parent = null, LemonadeFile p__root = null) : base(p__io)
{
m_parent = p__parent;
m_root = p__root;
_read();
}
private void _read()
{
_headerType = ((LemonadeFile.HeaderTypeEnum)m_io.ReadU1());
_filename = KaitaiStream.BytesStripRight(m_io.ReadBytes(10), 32);
_lenData = m_io.ReadU2le();
switch (HeaderType)
{
case LemonadeFile.HeaderTypeEnum.Program:
{
_params = new ProgramParams(m_io, this, m_root);
break;
}
case LemonadeFile.HeaderTypeEnum.NumArray:
{
_params = new ArrayParams(m_io, this, m_root);
break;
}
case LemonadeFile.HeaderTypeEnum.CharArray:
{
_params = new ArrayParams(m_io, this, m_root);
break;
}
case LemonadeFile.HeaderTypeEnum.Bytes:
{
_params = new BytesParams(m_io, this, m_root);
break;
}
}
_checksum = m_io.ReadU1();
}
private HeaderTypeEnum _headerType;
private byte[] _filename;
private ushort _lenData;
private KaitaiStruct _params;
private byte _checksum;
private LemonadeFile m_root;
private LemonadeFile.Block m_parent;
public HeaderTypeEnum HeaderType { get { return _headerType; } }
public byte[] Filename { get { return _filename; } }
public ushort LenData { get { return _lenData; } }
public KaitaiStruct Params { get { return _params; } }

/// <summary>
/// Bitwise XOR of all bytes including the flag byte
/// </summary>
public byte Checksum { get { return _checksum; } }
public LemonadeFile M_Root { get { return m_root; } }
public LemonadeFile.Block M_Parent { get { return m_parent; } }
}
public partial class ArrayParams : KaitaiStruct
{
public static ArrayParams FromFile(string fileName)
{
return new ArrayParams(new KaitaiStream(fileName));
}

public ArrayParams(KaitaiStream p__io, LemonadeFile.Header p__parent = null, LemonadeFile p__root = null) : base(p__io)
{
m_parent = p__parent;
m_root = p__root;
_read();
}
private void _read()
{
_reserved = m_io.ReadU1();
_varName = m_io.ReadU1();
_reserved1 = m_io.ReadBytes(2);
if (!((KaitaiStream.ByteArrayCompare(Reserved1, new byte[] { 0, 128 }) == 0)))
{
throw new ValidationNotEqualError(new byte[] { 0, 128 }, Reserved1, M_Io, "/types/array_params/seq/2");
}
}
private byte _reserved;
private byte _varName;
private byte[] _reserved1;
private LemonadeFile m_root;
private LemonadeFile.Header m_parent;
public byte Reserved { get { return _reserved; } }

/// <summary>
/// Variable name (1..26 meaning A$..Z$ +192)
/// </summary>
public byte VarName { get { return _varName; } }
public byte[] Reserved1 { get { return _reserved1; } }
public LemonadeFile M_Root { get { return m_root; } }
public LemonadeFile.Header M_Parent { get { return m_parent; } }
}
private List<Block> _blocks;
private LemonadeFile m_root;
private KaitaiStruct m_parent;
public List<Block> Blocks { get { return _blocks; } }
public LemonadeFile M_Root { get { return m_root; } }
public KaitaiStruct M_Parent { get { return m_parent; } }
}
}

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