Skip warning around GC.SharpCompress inclusion

ExtractionTool/ExtractionTool.csproj

@@ -10,7 +10,7 @@
         <Nullable>enable</Nullable>
         <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings>
         <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
-        <Version>2.0.0</Version>
+        <Version>2.0.1</Version>
     </PropertyGroup>
 
     <!-- Support All Frameworks -->
@@ -27,14 +27,6 @@
         <TargetFrameworks>net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
     </PropertyGroup>
 
-    <!-- Set a build flag for Windows specifically -->
-    <PropertyGroup Condition="'$(RuntimeIdentifier)'=='win-x86'">
-        <DefineConstants>$(DefineConstants);WINX86</DefineConstants>
-    </PropertyGroup>
-    <PropertyGroup Condition="'$(RuntimeIdentifier)'=='win-x64'">
-        <DefineConstants>$(DefineConstants);WINX64</DefineConstants>
-    </PropertyGroup>
-
     <!-- These are needed for dealing with native Windows DLLs -->
     <ItemGroup Condition="'$(RuntimeIdentifier)'=='win-x86'">
         <ContentWithTargetPath Include="..\SabreTools.Serialization\runtimes\win-x86\native\CascLib.dll">
@@ -66,7 +58,7 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="SabreTools.IO" Version="1.7.5" />
+        <PackageReference Include="SabreTools.IO" Version="[1.7.5]" />
         <PackageReference Include="System.Text.Encoding.CodePages" Version="9.0.9" Condition="!$(TargetFramework.StartsWith(`net2`)) AND !$(TargetFramework.StartsWith(`net3`)) AND !$(TargetFramework.StartsWith(`net40`)) AND !$(TargetFramework.StartsWith(`net452`))" />
     </ItemGroup>
 

InfoPrint/InfoPrint.csproj

@@ -10,7 +10,7 @@
         <Nullable>enable</Nullable>
         <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings>
         <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
-        <Version>2.0.0</Version>
+        <Version>2.0.1</Version>
     </PropertyGroup>
 
     <!-- Support All Frameworks -->
@@ -32,8 +32,8 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="SabreTools.IO" Version="1.7.5" />
-        <PackageReference Include="SabreTools.Hashing" Version="1.5.0" />
+        <PackageReference Include="SabreTools.IO" Version="[1.7.5]" />
+        <PackageReference Include="SabreTools.Hashing" Version="[1.5.0]" />
     </ItemGroup>
 
 </Project>

README.MD

@@ -8,7 +8,7 @@ Find the link to the Nuget package [here](https://www.nuget.org/packages/SabreTo
 
 The following non-project libraries (or ports thereof) are used for file handling:
 
-- [SharpCompress](https://github.com/adamhathcock/sharpcompress) - Common archive format extraction
+- [GrindCore.SharpCompress](https://github.com/Nanook/GrindCore.SharpCompress) - Common archive format extraction
 - [StormLibSharp](https://github.com/robpaveza/stormlibsharp) - MoPaQ extraction [Unused in .NET Framework 2.0/3.5/4.0 and non-Windows builds due to Windows-specific libraries]
 
 The following projects have influenced this library:
@@ -66,7 +66,7 @@ Options:
 | InstallShield CAB | |
 | Microsoft cabinet file | Does not support LZX or Quantum compression |
 | Microsoft LZ-compressed files | KWAJ, QBasic, and SZDD variants |
-| MoPaQ game data archive (MPQ) | Currently not working. Windows only. .NET Framework 4.5.2 and above |
+| MoPaQ game data archive (MPQ) | Windows only. .NET Framework 4.5.2 and above |
 | New Exectuable | Embedded archives and executables in the overlay and Wise installer |
 | NovaLogic Game Archive Format (PFF) | |
 | PKZIP and derived files (ZIP, etc.) | .NET Framework 4.6.2 and greater |

SabreTools.Serialization.Test/Readers/XZTests.cs

@@ -0,0 +1,73 @@
+using System.IO;
+using System.Linq;
+using SabreTools.Serialization.Readers;
+using Xunit;
+
+namespace SabreTools.Serialization.Test.Readers
+{
+    public class XZTests
+    {
+        [Fact]
+        public void NullArray_Null()
+        {
+            byte[]? data = null;
+            int offset = 0;
+            var deserializer = new XZ();
+
+            var actual = deserializer.Deserialize(data, offset);
+            Assert.Null(actual);
+        }
+
+        [Fact]
+        public void EmptyArray_Null()
+        {
+            byte[]? data = [];
+            int offset = 0;
+            var deserializer = new XZ();
+
+            var actual = deserializer.Deserialize(data, offset);
+            Assert.Null(actual);
+        }
+
+        [Fact]
+        public void InvalidArray_Null()
+        {
+            byte[]? data = [.. Enumerable.Repeat<byte>(0xFF, 1024)];
+            int offset = 0;
+            var deserializer = new XZ();
+
+            var actual = deserializer.Deserialize(data, offset);
+            Assert.Null(actual);
+        }
+
+        [Fact]
+        public void NullStream_Null()
+        {
+            Stream? data = null;
+            var deserializer = new XZ();
+
+            var actual = deserializer.Deserialize(data);
+            Assert.Null(actual);
+        }
+
+        [Fact]
+        public void EmptyStream_Null()
+        {
+            Stream? data = new MemoryStream([]);
+            var deserializer = new XZ();
+
+            var actual = deserializer.Deserialize(data);
+            Assert.Null(actual);
+        }
+
+        [Fact]
+        public void InvalidStream_Null()
+        {
+            Stream? data = new MemoryStream([.. Enumerable.Repeat<byte>(0xFF, 1024)]);
+            var deserializer = new XZ();
+
+            var actual = deserializer.Deserialize(data);
+            Assert.Null(actual);
+        }
+    }
+}

SabreTools.Serialization.Test/SabreTools.Serialization.Test.csproj

@@ -27,7 +27,7 @@
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
-        <PackageReference Include="SabreTools.Hashing" Version="1.5.0" />
+        <PackageReference Include="SabreTools.Hashing" Version="[1.5.0]" />
         <PackageReference Include="xunit" Version="2.9.3" />
         <PackageReference Include="xunit.runner.visualstudio" Version="3.1.4">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

SabreTools.Serialization/Extensions/XZ.cs

@@ -0,0 +1,62 @@
+using System.Collections.Generic;
+
+namespace SabreTools.Data.Extensions
+{
+    public static class XZ
+    {
+        /// <summary>
+        /// Decode a value from a variable-length integer
+        /// </summary>
+        /// <param name="value">Value to decode</param>
+        /// <param name="maxSize">Maximum number of bytes to parse</param>
+        /// <param name="length">Number of bytes parsed</param>
+        /// <returns>UInt64 representing the decoded integer</returns>
+        /// <see href="https://tukaani.org/xz/xz-file-format.txt"/>
+        public static ulong DecodeVariableLength(this byte[] value, int maxSize, out int length)
+        {
+            length = 0;
+            if (maxSize <= 0)
+                return 0;
+
+            if (maxSize > 9)
+                maxSize = 9;
+
+            ulong output = (ulong)(value[0] & 0x7F);
+            int i = 0;
+
+            while ((value[i++] & 0x80) != 0)
+            {
+                if (i >= maxSize || value[i] == 0x00)
+                    return 0;
+
+                output |= (ulong)(value[i] & 0x7F) << (i * 7);
+            }
+
+            length = i;
+            return output;
+        }
+
+        /// <summary>
+        /// Encode a value to a variable-length integer
+        /// </summary>
+        /// <param name="value">Value to encode</param>
+        /// <returns>Byte array representing the encoded integer</returns>
+        /// <see href="https://tukaani.org/xz/xz-file-format.txt"/>
+        public static byte[] EncodeVariableLength(this ulong value)
+        {
+            if (value > long.MaxValue / 2)
+                return [];
+
+            var output = new List<byte>();
+
+            while (value >= 0x80)
+            {
+                output.Add((byte)(value | 0x80));
+                value >>= 7;
+            }
+
+            output.Add((byte)value);
+            return [.. output];
+        }
+    }
+}

SabreTools.Serialization/Models/BZip2/Archive.cs

@@ -1,10 +1,18 @@
 namespace SabreTools.Data.Models.BZip2
 {
-    /// <summary>
-    /// This is a placeholder model for future work
-    /// </summary>
+    /// <see href="https://github.com/dsnet/compress/blob/master/doc/bzip2-format.pdf"/>
     public class Archive
     {
+        /// <summary>
+        /// Stream header
+        /// </summary>
+        public Header? Header { get; set; }
 
+        // TODO: Implement remaining structures
+
+        /// <summary>
+        /// Stream footer
+        /// </summary>
+        public Footer? Footer { get; set; }
     }
 }

SabreTools.Serialization/Models/BZip2/Block.cs

@@ -0,0 +1,12 @@
+namespace SabreTools.Data.Models.BZip2
+{
+    public class Block
+    {
+        /// <summary>
+        /// Block header
+        /// </summary>
+        public BlockHeader? Header { get; set; }
+
+        // TODO: Implement remaining structures
+    }
+}

SabreTools.Serialization/Models/BZip2/BlockHeader.cs

@@ -0,0 +1,37 @@
+namespace SabreTools.Data.Models.BZip2
+{
+    public class BlockHeader
+    {
+        /// <summary>
+        /// A 48-bit integer value 31 41 59 26 53 59, which
+        /// is the binary-coded decimal representation of
+        /// pi. It is used to differentiate the block
+        /// from the footer.
+        /// </summary>
+        /// <remarks>This may not be byte-aligned</remarks>
+        public byte[]? Magic { get; set; }
+
+        /// <summary>
+        /// The CRC-32 checksum of the uncompressed data contained
+        /// in <see cref="BlockData"/>. It is the same checksum
+        /// used in GZip, but is slightly different due to the
+        /// bit-packing differences.
+        /// </summary>
+        public uint Crc32 { get; set; }
+
+        /// <summary>
+        /// Should be 0. Previous versions of BZip2 allowed
+        /// the input data to be randomized to avoid
+        /// pathological strings from causing the runtime
+        /// to be exponential.
+        /// </summary>
+        /// <remarks>Actually a 1-bit value</remarks>
+        public byte Randomized { get; set; }
+
+        /// <summary>
+        /// Contains the origin pointer used in the BWT stage
+        /// </summary>
+        /// <remarks>Actually a 24-bit value</remarks>
+        public uint OrigPtr { get; set; }
+    }
+}

SabreTools.Serialization/Models/BZip2/BlockTrees.cs

@@ -0,0 +1,26 @@
+namespace SabreTools.Data.Models.BZip2
+{
+    public class BlockTrees
+    {
+        // TODO: Implement SymMap
+
+        /// <summary>
+        /// Indicates the number of Huffman trees used in
+        /// the HUFF stage. It must between 2 and 6.
+        /// </summary>
+        /// <remarks>Actually a 3-bit value</remarks>
+        public byte NumTrees { get; set; }
+
+        /// <summary>
+        /// Indicates the number of selectors used in the
+        /// HUFF stage. There must be at least 1 selector
+        /// defined.
+        /// </summary>
+        /// <remarks>Actually a 15-bit value</remarks>
+        public ushort NumSels { get; set; }
+
+        // TODO: Implement Selectors
+
+        // TODO: Implement Trees
+    }
+}

SabreTools.Serialization/Models/BZip2/Constants.cs

@@ -6,4 +6,4 @@ namespace SabreTools.Data.Models.BZip2
 
         public const string SignatureString = "BZh";
     }
-}
+}

SabreTools.Serialization/Models/BZip2/Footer.cs

@@ -0,0 +1,27 @@
+namespace SabreTools.Data.Models.BZip2
+{
+    public class Footer
+    {
+        /// <summary>
+        /// A 48-bit integer value 17 72 45 38 50 90, which
+        /// is the binary-coded decimal representation of
+        /// sqrt(pi). It is used to differentiate the block
+        /// from the footer.
+        /// </summary>
+        /// <remarks>This may not be byte-aligned</remarks>
+        public byte[]? Magic { get; set; }
+
+        /// <summary>
+        /// Contains a custom checksum computed using each of
+        /// the Block CRCs.
+        /// </summary>
+        /// <remarks>This may not be byte-aligned</remarks>
+        public uint Checksum { get; set; }
+
+        /// <summary>
+        /// Used to align the bit-stream to the next byte-aligned
+        /// edge and will contain between 0 and 7 bits.
+        /// </summary>
+        public byte Padding { get; set; }
+    }
+}

SabreTools.Serialization/Models/BZip2/Header.cs

@@ -0,0 +1,25 @@
+namespace SabreTools.Data.Models.BZip2
+{
+    public class Header
+    {
+        /// <summary>
+        /// "BZ"
+        /// </summary>
+        public string? Signature { get; set; }
+
+        /// <summary>
+        /// Version byte
+        /// </summary>
+        /// <remarks>
+        /// '0' indicates a BZ1 file
+        /// 'h' indicates a BZ2 file
+        /// </remarks>
+        public byte Version { get; set; }
+
+        /// <summary>
+        /// ASCII value of the compression level
+        /// </summary>
+        /// <remarks>Valid values between '1' and '9'</remarks>
+        public byte Level { get; set; }
+    }
+}

SabreTools.Serialization/Models/CHD/HeaderV5.cs

@@ -9,7 +9,8 @@ namespace SabreTools.Data.Models.CHD
         /// <summary>
         /// Which custom compressors are used?
         /// </summary>
-        public CodecType[] Compressors { get; set; } = new CodecType[4];
+        /// <remarks>There should be 4 entries</remarks>
+        public CodecType[] Compressors { get; set; }
 
         /// <summary>
         /// Logical size of the data (in bytes)

SabreTools.Serialization/Models/GZIP/Constants.cs

@@ -6,5 +6,9 @@ namespace SabreTools.Data.Models.GZIP
         public const byte ID1 = 0x1F;
 
         public const byte ID2 = 0x8B;
+
+        public static readonly byte[] SignatureBytes = [0x1F, 0x8B];
+
+        public static readonly byte[] TorrentGZHeader = [0x1F, 0x8B, 0x08, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1C, 0x00];
     }
 }

SabreTools.Serialization/Models/GZIP/Header.cs

@@ -66,6 +66,17 @@ namespace SabreTools.Data.Models.GZIP
         /// the header, with total length XLEN bytes.  It consists of a
         /// series of subfields, each of the form <see cref="ExtraFieldData"/>.
         /// </summary>
+        /// <remarks>This is the raw version of <see cref="ExtraField"/></remarks>
+        public byte[] ExtraFieldBytes { get; set; }
+
+        /// <summary>
+        /// Extra field
+        /// 
+        /// If the FLG.FEXTRA bit is set, an "extra field" is present in
+        /// the header, with total length XLEN bytes.  It consists of a
+        /// series of subfields, each of the form <see cref="ExtraFieldData"/>.
+        /// </summary>
+        /// <remarks>This is the processed version of <see cref="ExtraFieldBytes"/></remarks>
         public ExtraFieldData[]? ExtraField { get; set; }
 
         /// <summary>

SabreTools.Serialization/Models/README.MD

@@ -26,6 +26,7 @@ Not all of this information was able to be gathered directly from the files in q
 | [IBM Documentation](https://www.ibm.com/docs/en) | TAR |
 | [IETF](https://www.ietf.org/) | GZIP |
 | [Independent Commodore Library](https://petlibrary.tripod.com/) | PKZIP |
+| [Joe Tsai](https://github.com/dsnet/compress/blob/master/doc/bzip2-format.pdf) | BZip2 |
 | [Ladislav Zezula](http://zezula.net/en/tools/main.html) | MoPaQ |
 | [libaacs](https://code.videolan.org/videolan/libaacs/) | AACS |
 | [libbdplus](https://github.com/mwgoldsmith/bdplus) | BD+ |
@@ -45,6 +46,7 @@ Not all of this information was able to be gathered directly from the files in q
 | [Technical Committee T10](https://www.t10.org/) | PIC |
 | [The Go tools for Windows + Assembler](https://www.godevtool.com/) | PortableExecutable |
 | [The Whole Half-Life](https://twhl.info/wiki/page/Specification:_WAD3) | WAD3 |
+| [Tukaani](https://tukaani.org/xz/format.html) | XZ |
 | [Unshield](https://github.com/twogood/unshield) | InstallShieldCabinet |
 | [unshieldv3](https://github.com/wfr/unshieldv3) | InstallShieldArchiveV3 |
 | [Valve Developer Community](https://developer.valvesoftware.com/wiki/Main_Page) | BSP, VPK |

SabreTools.Serialization/Models/XZ/Archive.cs

@@ -1,10 +1,26 @@
 namespace SabreTools.Data.Models.XZ
 {
-    /// <summary>
-    /// This is a placeholder model for future work
-    /// </summary>
+    /// <see href="https://tukaani.org/xz/xz-file-format.txt"/>
     public class Archive
     {
+        /// <summary>
+        /// Pre-blocks header
+        /// </summary>
+        public Header? Header { get; set; }
 
+        /// <summary>
+        /// Sequence of 0 or more blocks
+        /// </summary>
+        public Block[]? Blocks { get; set; }
+
+        /// <summary>
+        /// Index structure
+        /// </summary>
+        public Index? Index { get; set; }
+
+        /// <summary>
+        /// Post-blocks footer
+        /// </summary>
+        public Footer? Footer { get; set; }
     }
 }

SabreTools.Serialization/Models/XZ/Block.cs

@@ -0,0 +1,80 @@
+namespace SabreTools.Data.Models.XZ
+{
+    /// <summary>
+    /// Represents a single compressed block in the stream
+    /// </summary>
+    public class Block
+    {
+        /// <summary>
+        /// Size of the header
+        /// </summary>
+        /// <remarks>
+        /// The real header size can be calculated by the following:
+        /// (HeaderSize + 1) * 4
+        /// </remarks>
+        public byte HeaderSize { get; set; }
+
+        /// <summary>
+        /// The Block Flags field is a bit field
+        /// </summary>
+        public BlockFlags Flags { get; set; }
+
+        /// <summary>
+        /// Size of the compressed data
+        /// Present if <see cref="BlockFlags.CompressedSize"/> is set. 
+        /// </summary>
+        /// <remarks>Stored as a variable-length integer</remarks>
+        public ulong CompressedSize { get; set; }
+
+        /// <summary>
+        /// Size of the block after decompression
+        /// Present if <see cref="BlockFlags.UncompressedSize"/> is set. 
+        /// </summary>
+        /// <remarks>Stored as a variable-length integer</remarks>
+        public ulong UncompressedSize { get; set; }
+
+        /// <summary>
+        /// List of filter flags
+        /// </summary>
+        /// <remarks>
+        /// The number of filter flags is given by the first two
+        /// bits of <see cref="Flags"/> 
+        /// </remarks>
+        public FilterFlag[]? FilterFlags { get; set; }
+
+        /// <summary>
+        /// This field contains as many null byte as it is needed to make
+        /// the Block Header have the size specified in Block Header Size.
+        /// </summary>
+        public byte[]? HeaderPadding { get; set; }
+
+        /// <summary>
+        /// The CRC32 is calculated over everything in the Block Header
+        /// field except the CRC32 field itself. It is stored as an
+        /// unsigned 32-bit little endian integer. 
+        /// </summary>
+        public uint Crc32 { get; set; }
+
+        /// <summary>
+        /// The format of Compressed Data depends on Block Flags and List
+        /// of Filter Flags
+        /// </summary>
+        public byte[]? CompressedData { get; set; }
+
+        /// <summary>
+        /// Block Padding MUST contain 0-3 null bytes to make the size of
+        /// the Block a multiple of four bytes. This can be needed when
+        /// the size of Compressed Data is not a multiple of four.
+        /// </summary>
+        public byte[]? BlockPadding { get; set; }
+
+        /// <summary>
+        /// The type and size of the Check field depends on which bits
+        /// are set in the Stream Flags field.
+        /// 
+        /// The Check, when used, is calculated from the original
+        /// uncompressed data.
+        /// </summary>
+        public byte[]? Check { get; set; }
+    }
+}

SabreTools.Serialization/Models/XZ/Constants.cs

@@ -2,6 +2,8 @@ namespace SabreTools.Data.Models.XZ
 {
     public static class Constants
     {
-        public static readonly byte[] SignatureBytes = [0xFD, 0x37, 0x7A, 0x58, 0x5A, 0x00];
+        public static readonly byte[] HeaderSignatureBytes = [0xFD, 0x37, 0x7A, 0x58, 0x5A, 0x00];
+
+        public static readonly byte[] FooterSignatureBytes = [0x59, 0x5A];
     }
-}
+}

SabreTools.Serialization/Models/XZ/Enums.cs

@@ -0,0 +1,47 @@
+using System;
+
+namespace SabreTools.Data.Models.XZ
+{
+    [Flags]
+    public enum BlockFlags : byte
+    {
+        #region Bits 0-1 - Number of filters
+
+        OneFilter = 0x00,
+        TwoFilters = 0x01,
+        ThreeFiltrs = 0x02,
+        FourFilters = 0x03,
+
+        #endregion
+
+        /// <summary>
+        /// Compressed size field present
+        /// </summary>
+        CompressedSize = 0x40,
+
+        /// <summary>
+        /// Uncompressed size field present
+        /// </summary>
+        UncompressedSize = 0x80,
+    }
+
+    public enum HeaderFlags : ushort
+    {
+        None = 0x0000,
+        Crc32 = 0x0100,
+        Reserved0x02 = 0x0200,
+        Reserved0x03 = 0x0300,
+        Crc64 = 0x0400,
+        Reserved0x05 = 0x0500,
+        Reserved0x06 = 0x0600,
+        Reserved0x07 = 0x0700,
+        Reserved0x08 = 0x0800,
+        Reserved0x09 = 0x0900,
+        Sha256 = 0x0A00,
+        Reserved0x0B = 0x0B00,
+        Reserved0x0C = 0x0C00,
+        Reserved0x0D = 0x0D00,
+        Reserved0x0E = 0x0E00,
+        Reserved0x0F = 0x0F00,
+    }
+}

SabreTools.Serialization/Models/XZ/FilterFlags.cs

@@ -0,0 +1,23 @@
+namespace SabreTools.Data.Models.XZ
+{
+    public class FilterFlag
+    {
+        /// <summary>
+        /// Filter ID
+        /// </summary>
+        /// <remarks>Stored as a variable-length integer</remarks>
+        public ulong FilterID { get; set; }
+
+        /// <summary>
+        /// Filter ID
+        /// </summary>
+        /// <remarks>Stored as a variable-length integer</remarks>
+        public ulong SizeOfProperties { get; set; }
+
+        /// <summary>
+        /// Properties of the filter whose length is given by
+        /// <see cref="SizeOfProperties"/> 
+        /// </summary>
+        public byte[]? Properties { get; set; }
+    }
+}

SabreTools.Serialization/Models/XZ/Footer.cs

@@ -0,0 +1,39 @@
+namespace SabreTools.Data.Models.XZ
+{
+    /// <summary>
+    /// Represents the post-block data in the stream
+    /// </summary>
+    public class Footer
+    {
+        /// <summary>
+        /// The CRC32 is calculated from the Backward Size and Stream Flags
+        /// fields. It is stored as an unsigned 32-bit little endian
+        /// integer.
+        /// </summary>
+        public uint Crc32 { get; set; }
+
+        /// <summary>
+        /// Backward Size is stored as a 32-bit little endian integer,
+        /// which indicates the size of the Index field as multiple of
+        /// four bytes, minimum value being four bytes.
+        /// </summary>
+        /// <remarks>
+        /// The real index size can be calculated by the following:
+        /// (BackwardSize + 1) * 4
+        /// </remarks>
+        public uint BackwardSize { get; set; }
+
+        /// <summary>
+        /// This is a copy of the Stream Flags field from the Stream
+        /// Header. The information stored to Stream Flags is needed
+        /// when parsing the Stream backwards.
+        /// </summary>
+        public HeaderFlags Flags { get; set; }
+
+        /// <summary>
+        /// Header magic number ("YZ")
+        /// </summary>
+        /// <remarks>2 bytes</remarks>
+        public byte[]? Signature { get; set; }
+    }
+}

SabreTools.Serialization/Models/XZ/Header.cs

@@ -0,0 +1,27 @@
+namespace SabreTools.Data.Models.XZ
+{
+    /// <summary>
+    /// Represents the pre-block data in the stream
+    /// </summary>
+    public class Header
+    {
+        /// <summary>
+        /// Header magic number (0xFD, '7', 'z', 'X', 'Z', 0x00)
+        /// </summary>
+        /// <remarks>6 bytes</remarks>
+        public byte[]? Signature { get; set; }
+
+        /// <summary>
+        /// The first byte of Stream Flags is always a null byte. In the
+        /// future, this byte may be used to indicate a new Stream version
+        /// or other Stream properties.
+        /// </summary>
+        public HeaderFlags Flags { get; set; }
+
+        /// <summary>
+        /// The CRC32 is calculated from the Stream Flags field. It is
+        /// stored as an unsigned 32-bit little endian integer.
+        /// </summary>
+        public uint Crc32 { get; set; }
+    }
+}

SabreTools.Serialization/Models/XZ/Index.cs

@@ -0,0 +1,36 @@
+namespace SabreTools.Data.Models.XZ
+{
+    public class Index
+    {
+        /// <summary>
+        /// The value of Index Indicator is always 0x00
+        /// </summary>
+        public byte IndexIndicator { get; set; }
+
+        /// <summary>
+        /// This field indicates how many Records there are in the List
+        /// of Records field, and thus how many Blocks there are in the
+        /// Stream
+        /// </summary>
+        /// <remarks>Stored as a variable-length integer</remarks>
+        public ulong NumberOfRecords { get; set; }
+
+        /// <summary>
+        /// One record per block
+        /// </summary>
+        public Record[]? Records { get; set; }
+
+        /// <summary>
+        /// This field MUST contain 0-3 null bytes to pad the Index to
+        /// a multiple of four bytes.
+        /// </summary>
+        public byte[]? Padding { get; set; }
+
+        /// <summary>
+        /// The CRC32 is calculated over everything in the Index field
+        /// except the CRC32 field itself. The CRC32 is stored as an
+        /// unsigned 32-bit little endian integer.
+        /// </summary>
+        public uint Crc32 { get; set; }
+    }
+}

SabreTools.Serialization/Models/XZ/Record.cs

@@ -0,0 +1,17 @@
+namespace SabreTools.Data.Models.XZ
+{
+    public class Record
+    {
+        /// <summary>
+        /// Unpadded size of the block
+        /// </summary>
+        /// <remarks>Stored as a variable-length integer</remarks>
+        public ulong UnpaddedSize { get; set; }
+
+        /// <summary>
+        /// Uncompressed size of the block
+        /// </summary>
+        /// <remarks>Stored as a variable-length integer</remarks>
+        public ulong UncompressedSize { get; set; }
+    }
+}

SabreTools.Serialization/Printer.cs

@@ -75,6 +75,7 @@ namespace SabreTools.Serialization
                 Wrapper.WiseSectionHeader item => item.PrettyPrint(),
                 Wrapper.XeMID item => item.PrettyPrint(),
                 Wrapper.XMID item => item.PrettyPrint(),
+                Wrapper.XZ item => item.PrettyPrint(),
                 Wrapper.XZP item => item.PrettyPrint(),
                 _ => null,
             };
@@ -130,6 +131,7 @@ namespace SabreTools.Serialization
                 Wrapper.WiseSectionHeader item => item.ExportJSON(),
                 Wrapper.XeMID item => item.ExportJSON(),
                 Wrapper.XMID item => item.ExportJSON(),
+                Wrapper.XZ item => item.ExportJSON(),
                 Wrapper.XZP item => item.ExportJSON(),
                 _ => string.Empty,
             };
@@ -558,6 +560,16 @@ namespace SabreTools.Serialization
             return builder;
         }
 
+        /// <summary>
+        /// Export the item information as pretty-printed text
+        /// </summary>
+        private static StringBuilder PrettyPrint(this Wrapper.XZ item)
+        {
+            var builder = new StringBuilder();
+            XZ.Print(builder, item.Model);
+            return builder;
+        }
+
         /// <summary>
         /// Export the item information as pretty-printed text
         /// </summary>

SabreTools.Serialization/Printers/XZ.cs

@@ -0,0 +1,133 @@
+using System.Text;
+using SabreTools.Data.Models.XZ;
+
+namespace SabreTools.Data.Printers
+{
+    public class XZ : IPrinter<Archive>
+    {
+        /// <inheritdoc/>
+        public void PrintInformation(StringBuilder builder, Archive model)
+            => Print(builder, model);
+
+        public static void Print(StringBuilder builder, Archive archive)
+        {
+            builder.AppendLine("xz Information:");
+            builder.AppendLine("-------------------------");
+            builder.AppendLine();
+
+            Print(builder, archive.Header);
+            Print(builder, archive.Blocks);
+            Print(builder, archive.Index);
+            Print(builder, archive.Footer);
+        }
+
+        private static void Print(StringBuilder builder, Header? header)
+        {
+            builder.AppendLine("  Header Information:");
+            builder.AppendLine("  -------------------------");
+            if (header == null)
+            {
+                builder.AppendLine("  No header");
+                builder.AppendLine();
+                return;
+            }
+
+            builder.AppendLine(header.Signature, "  Signature");
+            builder.AppendLine($" Flags: {header.Flags} (0x{(ushort)header.Flags:X4})");
+            builder.AppendLine(header.Crc32, "  CRC-32");
+            builder.AppendLine();
+        }
+
+        private static void Print(StringBuilder builder, Block[]? blocks)
+        {
+            builder.AppendLine("  Blocks Information:");
+            builder.AppendLine("  -------------------------");
+            if (blocks == null || blocks.Length == 0)
+            {
+                builder.AppendLine("  No blocks");
+                builder.AppendLine();
+                return;
+            }
+
+            for (int i = 0; i < blocks.Length; i++)
+            {
+                var block = blocks[i];
+
+                builder.AppendLine($"  Block {i}:");
+                builder.AppendLine(block.HeaderSize, "    Header size");
+                builder.AppendLine($" Flags: {block.Flags} (0x{(byte)block.Flags:X2})");
+                builder.AppendLine(block.CompressedSize, "    Compressed size");
+                builder.AppendLine(block.UncompressedSize, "    Uncompressed size");
+                // TODO: Print filter flags
+                builder.AppendLine(block.HeaderPadding, "    Header padding");
+                builder.AppendLine(block.Crc32, "    CRC-32");
+                if (block.CompressedData == null)
+                    builder.AppendLine("    Compressed data length: [NULL]");
+                else
+                    builder.AppendLine(block.CompressedData.Length, "    Compressed data length");
+                builder.AppendLine(block.BlockPadding, "    Block padding");
+                builder.AppendLine(block.Check, "    Check");
+            }
+
+            builder.AppendLine();
+        }
+
+        private static void Print(StringBuilder builder, Index? index)
+        {
+            builder.AppendLine("  Index Information:");
+            builder.AppendLine("  -------------------------");
+            if (index == null)
+            {
+                builder.AppendLine("  No index");
+                builder.AppendLine();
+                return;
+            }
+
+            builder.AppendLine(index.IndexIndicator, "  Index indicator");
+            builder.AppendLine(index.NumberOfRecords, "  Number of records");
+            Print(builder, index.Records);
+            builder.AppendLine(index.Padding, "  Padding");
+            builder.AppendLine(index.Crc32, "  CRC-32");
+            builder.AppendLine();
+        }
+
+        private static void Print(StringBuilder builder, Record[]? records)
+        {
+            builder.AppendLine("  Records Information:");
+            builder.AppendLine("  -------------------------");
+            if (records == null || records.Length == 0)
+            {
+                builder.AppendLine("  No records");
+                builder.AppendLine();
+                return;
+            }
+
+            for (int i = 0; i < records.Length; i++)
+            {
+                var record = records[i];
+
+                builder.AppendLine($"  Block {i}:");
+                builder.AppendLine(record.UnpaddedSize, "    Unpadded size");
+                builder.AppendLine(record.UncompressedSize, "    Uncompressed size");
+            }
+        }
+
+        private static void Print(StringBuilder builder, Footer? footer)
+        {
+            builder.AppendLine("  Footer Information:");
+            builder.AppendLine("  -------------------------");
+            if (footer == null)
+            {
+                builder.AppendLine("  No footer");
+                builder.AppendLine();
+                return;
+            }
+
+            builder.AppendLine(footer.Crc32, "  CRC-32");
+            builder.AppendLine(footer.BackwardSize, "  Backward size");
+            builder.AppendLine($" Flags: {footer.Flags} (0x{(ushort)footer.Flags:X4})");
+            builder.AppendLine(footer.Signature, "  Signature");
+            builder.AppendLine();
+        }
+    }
+}

SabreTools.Serialization/Readers/GZip.cs

@@ -85,6 +85,10 @@ namespace SabreTools.Serialization.Readers
                 // Cache the current position
                 long currentPosition = data.Position;
 
+                // Read the raw data first
+                obj.ExtraFieldBytes = data.ReadBytes(obj.ExtraLength);
+                data.Seek(currentPosition, SeekOrigin.Begin);
+
                 List<ExtraFieldData> extraFields = [];
                 while (data.Position < currentPosition + obj.ExtraLength)
                 {

SabreTools.Serialization/Readers/PortableExecutable.cs

@@ -106,6 +106,10 @@ namespace SabreTools.Serialization.Readers
 
                 #endregion
 
+                // Cache the overlay offset
+                long endOfSectionData = optionalHeader?.SizeOfHeaders ?? 0;
+                Array.ForEach(pex.SectionTable, s => endOfSectionData += s.SizeOfRawData);
+
                 #region Symbol Table and String Table
 
                 offset = initialOffset + fileHeader.PointerToSymbolTable;
@@ -326,7 +330,9 @@ namespace SabreTools.Serialization.Readers
                         #region Hidden Resources
 
                         // If we have not used up the full size, parse the remaining chunk as a single resource
-                        if (pex.ResourceDirectoryTable?.Entries != null && tableOffset < tableSize)
+                        if (pex.ResourceDirectoryTable?.Entries != null
+                            && tableOffset < tableSize
+                            && (offset + tableOffset) != endOfSectionData)
                         {
                             // Resize the entry array to accomodate one more
                             var localEntries = pex.ResourceDirectoryTable.Entries;
@@ -1581,8 +1587,8 @@ namespace SabreTools.Serialization.Readers
                 // Read the name from the offset, if needed
                 if (nameEntry && obj.Entries[i].NameOffset > 0 && obj.Entries[i].NameOffset < tableData.Length)
                 {
-                    offset = (int)obj.Entries[i].NameOffset;
-                    obj.Entries[i].Name = ParseResourceDirectoryString(tableData, ref offset);
+                    int nameOffset = (int)obj.Entries[i].NameOffset;
+                    obj.Entries[i].Name = ParseResourceDirectoryString(tableData, ref nameOffset);
                 }
             }
 

SabreTools.Serialization/Readers/XZ.cs

@@ -0,0 +1,303 @@
+using System;
+using System.IO;
+using SabreTools.Data.Extensions;
+using SabreTools.Data.Models.XZ;
+using SabreTools.IO.Extensions;
+using static SabreTools.Data.Models.XZ.Constants;
+
+namespace SabreTools.Serialization.Readers
+{
+    public class XZ : BaseBinaryReader<Archive>
+    {
+        /// <inheritdoc/>
+        public override Archive? Deserialize(Stream? data)
+        {
+            // If the data is invalid
+            if (data == null || !data.CanRead)
+                return null;
+
+            try
+            {
+                // Cache the current offset
+                long initialOffset = data.Position;
+
+                // Create a new archive to fill
+                var archive = new Archive();
+
+                #region Header
+
+                // Try to parse the header
+                var header = ParseHeader(data);
+                if (!header.Signature.EqualsExactly(HeaderSignatureBytes))
+                    return null;
+
+                // Set the stream header
+                archive.Header = header;
+
+                // Cache the current offset
+                long endOfHeader = data.Position;
+
+                #endregion
+
+                #region Footer
+
+                // Seek to the start of the footer
+                data.Seek(-12, SeekOrigin.End);
+
+                // Cache the current offset
+                long startOfFooter = data.Position;
+
+                // Try to parse the footer
+                var footer = ParseFooter(data);
+                if (!footer.Signature.EqualsExactly(FooterSignatureBytes))
+                    return null;
+
+                // Set the footer
+                archive.Footer = footer;
+
+                #endregion
+
+                #region Index
+
+                // Seek to the start of the index
+                long indexOffset = startOfFooter - ((footer.BackwardSize + 1) * 4);
+                data.Seek(indexOffset, SeekOrigin.Begin);
+
+                // Try to parse the index
+                var index = ParseIndex(data);
+                if (index.IndexIndicator != 0x00)
+                    return null;
+                if (index.Records == null)
+                    return null;
+
+                // Set the index
+                archive.Index = index;
+
+                #endregion
+
+                #region Blocks
+
+                // Seek to the start of the blocks
+                data.Seek(endOfHeader, SeekOrigin.Begin);
+
+                // Create the block array
+                int blockCount = index.Records.Length;
+                archive.Blocks = new Block[blockCount];
+
+                // Try to parse the blocks
+                for (int i = 0; i < archive.Blocks.Length; i++)
+                {
+                    // Get the record for this block
+                    var record = index.Records[i];
+
+                    // Try to parse the block
+                    archive.Blocks[i] = ParseBlock(data, header.Flags, record.UnpaddedSize);
+                }
+
+                #endregion
+
+                return archive;
+            }
+            catch
+            {
+                // Ignore the actual error
+                return null;
+            }
+        }
+
+        /// <summary>
+        /// Parse a Stream into a Header
+        /// </summary>
+        /// <param name="data">Stream to parse</param>
+        /// <returns>Filled Header on success, null on error</returns>
+        public static Header ParseHeader(Stream data)
+        {
+            var obj = new Header();
+
+            obj.Signature = data.ReadBytes(6);
+            obj.Flags = (HeaderFlags)data.ReadUInt16LittleEndian();
+            obj.Crc32 = data.ReadUInt32LittleEndian();
+
+            return obj;
+        }
+
+        /// <summary>
+        /// Parse a Stream into a Block
+        /// </summary>
+        /// <param name="data">Stream to parse</param>
+        /// <param name="headerFlags">HeaderFlags to for determining the check value</param>
+        /// <param name="unpaddedSize">Unpadded data size from the index</param>
+        /// <returns>Filled Block on success, null on error</returns>
+        public static Block ParseBlock(Stream data, HeaderFlags headerFlags, ulong unpaddedSize)
+        {
+            // Cache the current offset
+            long currentOffset = data.Position;
+
+            // Determine the size of the check field
+            int checkSize = 0;
+            if (headerFlags == HeaderFlags.Crc32)
+                checkSize = 4;
+            else if (headerFlags == HeaderFlags.Crc64)
+                checkSize = 8;
+            else if (headerFlags == HeaderFlags.Sha256)
+                checkSize = 32;
+
+            var obj = new Block();
+
+            obj.HeaderSize = data.ReadByteValue();
+            int realHeaderSize = (obj.HeaderSize + 1) * 4;
+            obj.Flags = (BlockFlags)data.ReadByteValue();
+
+#if NET20 || NET35
+            if ((obj.Flags & BlockFlags.CompressedSize) != 0)
+#else
+            if (obj.Flags.HasFlag(BlockFlags.CompressedSize))
+#endif
+                obj.CompressedSize = ParseVariableLength(data);
+
+#if NET20 || NET35
+            if ((obj.Flags & BlockFlags.UncompressedSize) != 0)
+#else
+            if (obj.Flags.HasFlag(BlockFlags.UncompressedSize))
+#endif
+                obj.UncompressedSize = ParseVariableLength(data);
+
+            // Determine the number of filters to read
+            int filterCount = ((byte)obj.Flags & 0x03) + 1;
+
+            // Try to parse the filters
+            obj.FilterFlags = new FilterFlag[filterCount];
+            for (int i = 0; i < obj.FilterFlags.Length; i++)
+            {
+                obj.FilterFlags[i] = ParseFilterFlag(data);
+            }
+
+            // Parse the padding as needed, adjusting for CRC size
+            int paddingLength = realHeaderSize - (int)(data.Position - currentOffset) - 4;
+            if (paddingLength >= 0)
+                obj.HeaderPadding = data.ReadBytes(paddingLength);
+
+            obj.Crc32 = data.ReadUInt32LittleEndian();
+
+            // Determine the compressed size
+            ulong compressedSize = obj.CompressedSize != 0
+                ? obj.CompressedSize
+                : unpaddedSize - (ulong)(realHeaderSize + checkSize);
+
+            // TODO: How to handle large blocks?
+            if ((int)compressedSize > 0)
+                obj.CompressedData = data.ReadBytes((int)compressedSize);
+
+            // Parse the padding as needed
+            paddingLength = 4 - (int)(unpaddedSize % 4);
+            if (paddingLength >= 0)
+                obj.BlockPadding = data.ReadBytes(paddingLength);
+
+            // Read the Check as needed
+            obj.Check = data.ReadBytes(checkSize);
+
+            return obj;
+        }
+
+        /// <summary>
+        /// Parse a Stream into a FilterFlag
+        /// </summary>
+        /// <param name="data">Stream to parse</param>
+        /// <returns>Filled FilterFlag on success, null on error</returns>
+        public static FilterFlag ParseFilterFlag(Stream data)
+        {
+            var obj = new FilterFlag();
+
+            obj.FilterID = ParseVariableLength(data);
+            obj.SizeOfProperties = ParseVariableLength(data);
+            obj.Properties = data.ReadBytes((int)obj.SizeOfProperties);
+
+            return obj;
+        }
+
+        /// <summary>
+        /// Parse a Stream into a Index
+        /// </summary>
+        /// <param name="data">Stream to parse</param>
+        /// <returns>Filled Index on success, null on error</returns>
+        public static Data.Models.XZ.Index ParseIndex(Stream data)
+        {
+            // Cache the current offset
+            long currentOffset = data.Position;
+
+            var obj = new Data.Models.XZ.Index();
+
+            obj.IndexIndicator = data.ReadByteValue();
+            obj.NumberOfRecords = ParseVariableLength(data);
+
+            obj.Records = new Record[obj.NumberOfRecords];
+            for (int i = 0; i < obj.Records.Length; i++)
+            {
+                obj.Records[i] = ParseRecord(data);
+            }
+
+            // Parse the padding as needed
+            int paddingLength = 4 - (int)(data.Position - currentOffset) % 4;
+            if (paddingLength >= 0)
+                obj.Padding = data.ReadBytes(paddingLength);
+
+            obj.Crc32 = data.ReadUInt32LittleEndian();
+
+            return obj;
+        }
+
+        /// <summary>
+        /// Parse a Stream into a Record
+        /// </summary>
+        /// <param name="data">Stream to parse</param>
+        /// <returns>Filled Record on success, null on error</returns>
+        public static Record ParseRecord(Stream data)
+        {
+            var obj = new Record();
+
+            obj.UnpaddedSize = ParseVariableLength(data);
+            obj.UncompressedSize = ParseVariableLength(data);
+
+            return obj;
+        }
+
+        /// <summary>
+        /// Parse a Stream into a Footer
+        /// </summary>
+        /// <param name="data">Stream to parse</param>
+        /// <returns>Filled Footer on success, null on error</returns>
+        public static Footer ParseFooter(Stream data)
+        {
+            var obj = new Footer();
+
+            obj.Crc32 = data.ReadUInt32LittleEndian();
+            obj.BackwardSize = data.ReadUInt32LittleEndian();
+            obj.Flags = (HeaderFlags)data.ReadUInt16LittleEndian();
+            obj.Signature = data.ReadBytes(2);
+
+            return obj;
+        }
+
+        /// <summary>
+        /// Parse a variable-length number from the stream
+        /// </summary>
+        /// <param name="data">Stream to parse</param>
+        /// <returns>Decoded variable-length value</returns>
+        private static ulong ParseVariableLength(Stream data)
+        {
+            // Cache the current offset
+            long currentOffset = data.Position;
+
+            // Read up to 9 bytes for decoding
+            int byteCount = (int)Math.Min(data.Length - data.Position, 9);
+            byte[] encoded = data.ReadBytes(byteCount);
+
+            // Attempt to decode the value
+            ulong output = encoded.DecodeVariableLength(byteCount, out int length);
+
+            // Seek the actual length processed and return
+            data.Seek(currentOffset + length, SeekOrigin.Begin);
+            return output;
+        }
+    }
+}

SabreTools.Serialization/SabreTools.Serialization.csproj

@@ -14,7 +14,8 @@
         <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings>
         <SymbolPackageFormat>snupkg</SymbolPackageFormat>
         <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
-        <Version>2.0.0</Version>
+        <Version>2.0.1</Version>
+        <WarningsNotAsErrors>NU5104</WarningsNotAsErrors>
 
         <!-- Package Properties -->
         <Authors>Matt Nadareski</Authors>
@@ -42,26 +43,19 @@
         <TargetFrameworks>net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
     </PropertyGroup>
 
-    <!-- Set a build flag for Windows specifically -->
-    <PropertyGroup Condition="'$(RuntimeIdentifier)'=='win-x86'">
-        <DefineConstants>$(DefineConstants);WINX86</DefineConstants>
-    </PropertyGroup>
-    <PropertyGroup Condition="'$(RuntimeIdentifier)'=='win-x64'">
-        <DefineConstants>$(DefineConstants);WINX64</DefineConstants>
-    </PropertyGroup>
-
     <!-- Exclude certain parts of external modules for by default -->
     <PropertyGroup>
         <DefaultItemExcludes>
             $(DefaultItemExcludes);
             **\AssemblyInfo.cs;
             _EXTERNAL\stormlibsharp\lib\**;
+            _EXTERNAL\stormlibsharp\src\CascLibSharp\**;
             _EXTERNAL\stormlibsharp\src\TestConsole\**
         </DefaultItemExcludes>
     </PropertyGroup>
 
     <!-- Exclude all external modules for .NET Framework 2.0, .NET Framework 3.5, or non-Windows builds -->
-    <PropertyGroup Condition="$(TargetFramework.StartsWith(`net2`)) OR $(TargetFramework.StartsWith(`net3`)) OR !($(RuntimeIdentifier.StartsWith(`win-x86`)) OR $(RuntimeIdentifier.StartsWith(`win-x64`)))">
+    <PropertyGroup Condition="$(TargetFramework.StartsWith(`net2`)) OR $(TargetFramework.StartsWith(`net3`))">
         <DefaultItemExcludes>
             $(DefaultItemExcludes);
             _EXTERNAL\**
@@ -85,11 +79,11 @@
     </ItemGroup>
 
     <ItemGroup>
+        <PackageReference Include="GrindCore.SharpCompress" Version="0.40.4-alpha" Condition="!$(TargetFramework.StartsWith(`net2`)) AND !$(TargetFramework.StartsWith(`net3`)) AND !$(TargetFramework.StartsWith(`net40`)) AND !$(TargetFramework.StartsWith(`net452`))" />
         <PackageReference Include="NetLegacySupport.Numerics" Version="1.0.1" Condition="$(TargetFramework.StartsWith(`net2`)) OR $(TargetFramework.StartsWith(`net3`))" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
-        <PackageReference Include="SabreTools.Hashing" Version="1.5.0" />
-        <PackageReference Include="SabreTools.IO" Version="1.7.5" />
-        <PackageReference Include="SharpCompress" Version="0.40.0" Condition="!$(TargetFramework.StartsWith(`net2`)) AND !$(TargetFramework.StartsWith(`net3`)) AND !$(TargetFramework.StartsWith(`net40`)) AND !$(TargetFramework.StartsWith(`net452`))" />
-    </ItemGroup>
+        <PackageReference Include="SabreTools.Hashing" Version="[1.5.0]" />
+        <PackageReference Include="SabreTools.IO" Version="[1.7.5]" />
+     </ItemGroup>
 
 </Project>

SabreTools.Serialization/WrapperFactory.cs

@@ -295,7 +295,7 @@ namespace SabreTools.Serialization
 
             #region GZip
 
-            if (magic.StartsWith(new byte[] { Data.Models.GZIP.Constants.ID1, Data.Models.GZIP.Constants.ID2 }))
+            if (magic.StartsWith(Data.Models.GZIP.Constants.SignatureBytes))
                 return WrapperType.GZip;
 
             if (extension.Equals("gz", StringComparison.OrdinalIgnoreCase))
@@ -788,7 +788,7 @@ namespace SabreTools.Serialization
 
             #region XZ
 
-            if (magic.StartsWith(Data.Models.XZ.Constants.SignatureBytes))
+            if (magic.StartsWith(Data.Models.XZ.Constants.HeaderSignatureBytes))
                 return WrapperType.XZ;
 
             if (extension.Equals("xz", StringComparison.OrdinalIgnoreCase))

SabreTools.Serialization/Wrappers/GZip.cs

@@ -1,5 +1,6 @@
 using System.IO;
 using SabreTools.Data.Models.GZIP;
+using SabreTools.IO.Extensions;
 
 namespace SabreTools.Serialization.Wrappers
 {
@@ -14,6 +15,60 @@ namespace SabreTools.Serialization.Wrappers
 
         #region Extension Properties
 
+        /// <summary>
+        /// Content CRC-32 as stored in the extra field
+        /// </summary>
+        /// <remarks>Only guaranteed for Torrent GZip format</remarks>
+        public byte[]? ContentCrc32
+        {
+            get
+            {
+                // Only valid for Torrent GZip
+                if (Header == null || !IsTorrentGZip)
+                    return null;
+
+                // CRC-32 is the second packed field
+                int extraIndex = 0x10;
+                return Header.ExtraFieldBytes.ReadBytes(ref extraIndex, 0x04);
+            }
+        }
+
+        /// <summary>
+        /// Content MD5 as stored in the extra field
+        /// </summary>
+        /// <remarks>Only guaranteed for Torrent GZip format</remarks>
+        public byte[]? ContentMd5
+        {
+            get
+            {
+                // Only valid for Torrent GZip
+                if (Header == null || !IsTorrentGZip)
+                    return null;
+
+                // MD5 is the first packed field
+                int extraIndex = 0x00;
+                return Header.ExtraFieldBytes.ReadBytes(ref extraIndex, 0x10);
+            }
+        }
+
+        /// <summary>
+        /// Content size as stored in the extra field
+        /// </summary>
+        /// <remarks>Only guaranteed for Torrent GZip format</remarks>
+        public ulong ContentSize
+        {
+            get
+            {
+                // Only valid for Torrent GZip
+                if (Header == null || !IsTorrentGZip)
+                    return 0;
+
+                // MD5 is the first packed field
+                int extraIndex = 0x00;
+                return Header.ExtraFieldBytes.ReadUInt64LittleEndian(ref extraIndex);
+            }
+        }
+
         /// <summary>
         /// Offset to the compressed data
         /// </summary>
@@ -54,6 +109,51 @@ namespace SabreTools.Serialization.Wrappers
         /// <inheritdoc cref="Archive.Header"/>
         public Header? Header => Model.Header;
 
+        /// <summary>
+        /// Indicates if the archive is in the standard
+        /// "Torrent GZip" format. This format is used by
+        /// some programs to store extended hashes in the
+        /// header while maintaining the format otherwise.
+        /// </summary>
+        public bool IsTorrentGZip
+        {
+            get
+            {
+                // If the header is invalid
+                if (Header == null)
+                    return false;
+
+                // Torrent GZip uses normal deflate, not GZIP deflate
+                if (Header.CompressionMethod != CompressionMethod.Deflate)
+                    return false;
+
+                // Only the extra field should be present
+                if (Header.Flags != Flags.FEXTRA)
+                    return false;
+
+                // The modification should be 0x00000000, but some implementations
+                // do not set this correctly, so it is skipped.
+
+                // No extra flags are set
+                if (Header.ExtraFlags != 0x00)
+                    return false;
+
+                // The OS should be FAT, regardless of the original platform, but
+                // some implementations do not set this correctly, so it is skipped.
+
+                // The extra field is non-standard, using the following format:
+                // - 0x00-0x0F - MD5 hash of the internal file
+                // - 0x10-0x13 - CRC-32 checksum of the internal file
+                // - 0x14-0x1B - Little-endian file size of the internal file
+                if (Header.ExtraLength != 0x1C)
+                    return false;
+                if (Header.ExtraFieldBytes == null || Header.ExtraFieldBytes.Length != 0x1C)
+                    return false;
+
+                return true;
+            }
+        }
+
         /// <inheritdoc cref="Archive.Trailer"/>
         public Trailer? Trailer => Model.Trailer;
 

SabreTools.Serialization/Wrappers/MoPaQ.Extraction.cs

@@ -1,5 +1,5 @@
 using System;
-#if (NET452_OR_GREATER || NETCOREAPP) && (WINX86 || WINX64)
+#if NET452_OR_GREATER || NETCOREAPP
 using System.IO;
 using StormLibSharp;
 #endif
@@ -11,9 +11,16 @@ namespace SabreTools.Serialization.Wrappers
         /// <inheritdoc/>
         public bool Extract(string outputDirectory, bool includeDebug)
         {
-#if (NET452_OR_GREATER || NETCOREAPP) && (WINX86 || WINX64)
+#if NET452_OR_GREATER || NETCOREAPP
             try
             {
+                // Limit use to Windows only
+                if (Environment.OSVersion.Platform != PlatformID.Win32NT)
+                {
+                    Console.WriteLine("Extraction is not supported for this operating system!");
+                    return false;
+                }
+
                 if (Filename == null || !File.Exists(Filename))
                     return false;
 

SabreTools.Serialization/Wrappers/NewExecutable.Extraction.cs

@@ -132,7 +132,7 @@ namespace SabreTools.Serialization.Wrappers
                         extension = "xml";
                         break;
                     }
-                    else if (overlaySample.StartsWith(Data.Models.XZ.Constants.SignatureBytes))
+                    else if (overlaySample.StartsWith(Data.Models.XZ.Constants.HeaderSignatureBytes))
                     {
                         extension = "xz";
                         break;

SabreTools.Serialization/Wrappers/PortableExecutable.Extraction.cs

@@ -271,7 +271,7 @@ namespace SabreTools.Serialization.Wrappers
                         extension = "xml";
                         break;
                     }
-                    else if (overlaySample.StartsWith(Data.Models.XZ.Constants.SignatureBytes))
+                    else if (overlaySample.StartsWith(Data.Models.XZ.Constants.HeaderSignatureBytes))
                     {
                         extension = "xz";
                         break;
@@ -474,7 +474,7 @@ namespace SabreTools.Serialization.Wrappers
                             extension = "xml";
                             break;
                         }
-                        else if (resourceSample.StartsWith(Data.Models.XZ.Constants.SignatureBytes))
+                        else if (resourceSample.StartsWith(Data.Models.XZ.Constants.HeaderSignatureBytes))
                         {
                             extension = "xz";
                             break;

SabreTools.Serialization/Wrappers/PortableExecutable.cs

@@ -90,7 +90,7 @@ namespace SabreTools.Serialization.Wrappers
 
                     // If the entry point matches with the start of a section, use that
                     int entryPointSection = FindEntryPointSectionIndex();
-                    if (entryPointSection >= 0 && OptionalHeader.AddressOfEntryPoint == SectionTable[entryPointSection]?.VirtualAddress)
+                    if (entryPointSection >= 0 && OptionalHeader.AddressOfEntryPoint == SectionTable[entryPointSection].VirtualAddress)
                     {
                         _entryPointData = GetSectionData(entryPointSection) ?? [];
                         return _entryPointData;
@@ -143,15 +143,15 @@ namespace SabreTools.Serialization.Wrappers
                     // Populate the raw header padding data based on the source
                     uint headerStartAddress = Stub.Header.NewExeHeaderAddr;
                     uint firstSectionAddress = uint.MaxValue;
-                    foreach (var s in SectionTable)
+                    foreach (var section in SectionTable)
                     {
-                        if (s == null || s.PointerToRawData == 0)
+                        if (section.PointerToRawData == 0)
                             continue;
-                        if (s.PointerToRawData < headerStartAddress)
+                        if (section.PointerToRawData < headerStartAddress)
                             continue;
 
-                        if (s.PointerToRawData < firstSectionAddress)
-                            firstSectionAddress = s.PointerToRawData;
+                        if (section.PointerToRawData < firstSectionAddress)
+                            firstSectionAddress = section.PointerToRawData;
                     }
 
                     // Check if the header length is more than 0 before reading data
@@ -328,15 +328,7 @@ namespace SabreTools.Serialization.Wrappers
 
                     // Search through all sections and find the furthest a section goes
                     long endOfSectionData = OptionalHeader.SizeOfHeaders;
-                    foreach (var section in SectionTable)
-                    {
-                        // If we have an invalid section
-                        if (section == null)
-                            continue;
-
-                        // Add the raw data size
-                        endOfSectionData += section.SizeOfRawData;
-                    }
+                    Array.ForEach(SectionTable, s => endOfSectionData += s.SizeOfRawData);
 
                     // If we didn't find the end of section data
                     if (endOfSectionData <= 0)
@@ -527,11 +519,8 @@ namespace SabreTools.Serialization.Wrappers
                     _sectionNames = new string[SectionTable.Length];
                     for (int i = 0; i < _sectionNames.Length; i++)
                     {
-                        var section = SectionTable[i];
-                        if (section == null)
-                            continue;
-
                         // TODO: Handle long section names with leading `/`
+                        var section = SectionTable[i];
                         byte[]? sectionNameBytes = section.Name;
                         if (sectionNameBytes != null)
                         {
@@ -2046,9 +2035,6 @@ namespace SabreTools.Serialization.Wrappers
 
             // Get the section data from the table
             var section = SectionTable[index];
-            if (section == null)
-                return null;
-
             uint address = section.VirtualAddress.ConvertVirtualAddress(SectionTable);
             if (address == 0)
                 return null;

SabreTools.Serialization/Wrappers/XZ.cs

@@ -73,7 +73,21 @@ namespace SabreTools.Serialization.Wrappers
             if (data == null || !data.CanRead)
                 return null;
 
-            return new XZ(new Archive(), data);
+            try
+            {
+                // Cache the current offset
+                long currentOffset = data.Position;
+
+                var model = new Readers.XZ().Deserialize(data);
+                if (model == null)
+                    return null;
+
+                return new XZ(model, data, currentOffset);
+            }
+            catch
+            {
+                return null;
+            }
         }
 
         #endregion