This page hosts a formal specification of .dat file format of Fallout using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.
All parsing code for C# generated by Kaitai Struct depends on the C# runtime library. You have to install it before you can parse data.
The C# runtime library is available in the NuGet Gallery. Installation instructions can also be found there.
Parse a local file and get structure in memory:
var data = FalloutDat.FromFile("path/to/local/file.dat");
Or parse structure from a byte array:
byte[] someArray = new byte[] { ... };
var data = new FalloutDat(new KaitaiStream(someArray));
After that, one can get various attributes from the structure by accessing properties like:
data.FolderCount // => get folder count
// This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
using System.Collections.Generic;
namespace Kaitai
{
public partial class FalloutDat : KaitaiStruct
{
public static FalloutDat FromFile(string fileName)
{
return new FalloutDat(new KaitaiStream(fileName));
}
public enum Compression
{
None = 32,
Lzss = 64,
}
public FalloutDat(KaitaiStream p__io, KaitaiStruct p__parent = null, FalloutDat p__root = null) : base(p__io)
{
m_parent = p__parent;
m_root = p__root ?? this;
_read();
}
private void _read()
{
_folderCount = m_io.ReadU4be();
_unknown1 = m_io.ReadU4be();
_unknown2 = m_io.ReadU4be();
_timestamp = m_io.ReadU4be();
_folderNames = new List<Pstr>();
for (var i = 0; i < FolderCount; i++)
{
_folderNames.Add(new Pstr(m_io, this, m_root));
}
_folders = new List<Folder>();
for (var i = 0; i < FolderCount; i++)
{
_folders.Add(new Folder(m_io, this, m_root));
}
}
public partial class Pstr : KaitaiStruct
{
public static Pstr FromFile(string fileName)
{
return new Pstr(new KaitaiStream(fileName));
}
public Pstr(KaitaiStream p__io, KaitaiStruct p__parent = null, FalloutDat p__root = null) : base(p__io)
{
m_parent = p__parent;
m_root = p__root;
_read();
}
private void _read()
{
_size = m_io.ReadU1();
_str = System.Text.Encoding.GetEncoding("ASCII").GetString(m_io.ReadBytes(Size));
}
private byte _size;
private string _str;
private FalloutDat m_root;
private KaitaiStruct m_parent;
public byte Size { get { return _size; } }
public string Str { get { return _str; } }
public FalloutDat M_Root { get { return m_root; } }
public KaitaiStruct M_Parent { get { return m_parent; } }
}
public partial class Folder : KaitaiStruct
{
public static Folder FromFile(string fileName)
{
return new Folder(new KaitaiStream(fileName));
}
public Folder(KaitaiStream p__io, FalloutDat p__parent = null, FalloutDat p__root = null) : base(p__io)
{
m_parent = p__parent;
m_root = p__root;
_read();
}
private void _read()
{
_fileCount = m_io.ReadU4be();
_unknown = m_io.ReadU4be();
_flags = m_io.ReadU4be();
_timestamp = m_io.ReadU4be();
_files = new List<File>();
for (var i = 0; i < FileCount; i++)
{
_files.Add(new File(m_io, this, m_root));
}
}
private uint _fileCount;
private uint _unknown;
private uint _flags;
private uint _timestamp;
private List<File> _files;
private FalloutDat m_root;
private FalloutDat m_parent;
public uint FileCount { get { return _fileCount; } }
public uint Unknown { get { return _unknown; } }
public uint Flags { get { return _flags; } }
public uint Timestamp { get { return _timestamp; } }
public List<File> Files { get { return _files; } }
public FalloutDat M_Root { get { return m_root; } }
public FalloutDat M_Parent { get { return m_parent; } }
}
public partial class File : KaitaiStruct
{
public static File FromFile(string fileName)
{
return new File(new KaitaiStream(fileName));
}
public File(KaitaiStream p__io, FalloutDat.Folder p__parent = null, FalloutDat p__root = null) : base(p__io)
{
m_parent = p__parent;
m_root = p__root;
f_contents = false;
_read();
}
private void _read()
{
_name = new Pstr(m_io, this, m_root);
_flags = ((FalloutDat.Compression) m_io.ReadU4be());
_offset = m_io.ReadU4be();
_sizeUnpacked = m_io.ReadU4be();
_sizePacked = m_io.ReadU4be();
}
private bool f_contents;
private byte[] _contents;
public byte[] Contents
{
get
{
if (f_contents)
return _contents;
KaitaiStream io = M_Root.M_Io;
long _pos = io.Pos;
io.Seek(Offset);
_contents = io.ReadBytes((Flags == FalloutDat.Compression.None ? SizeUnpacked : SizePacked));
io.Seek(_pos);
f_contents = true;
return _contents;
}
}
private Pstr _name;
private Compression _flags;
private uint _offset;
private uint _sizeUnpacked;
private uint _sizePacked;
private FalloutDat m_root;
private FalloutDat.Folder m_parent;
public Pstr Name { get { return _name; } }
public Compression Flags { get { return _flags; } }
public uint Offset { get { return _offset; } }
public uint SizeUnpacked { get { return _sizeUnpacked; } }
public uint SizePacked { get { return _sizePacked; } }
public FalloutDat M_Root { get { return m_root; } }
public FalloutDat.Folder M_Parent { get { return m_parent; } }
}
private uint _folderCount;
private uint _unknown1;
private uint _unknown2;
private uint _timestamp;
private List<Pstr> _folderNames;
private List<Folder> _folders;
private FalloutDat m_root;
private KaitaiStruct m_parent;
public uint FolderCount { get { return _folderCount; } }
public uint Unknown1 { get { return _unknown1; } }
public uint Unknown2 { get { return _unknown2; } }
public uint Timestamp { get { return _timestamp; } }
public List<Pstr> FolderNames { get { return _folderNames; } }
public List<Folder> Folders { get { return _folders; } }
public FalloutDat M_Root { get { return m_root; } }
public KaitaiStruct M_Parent { get { return m_parent; } }
}
}