Tests?

fxl.codes.kisekae.data.test/LhContainerTests.cs

@@ -0,0 +1,50 @@
+using System.Reflection;
+using fxl.codes.kisekae.data.Archives;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Logging.Abstractions;
+
+namespace fxl.codes.kisekae.data.test;
+
+public class LhContainerTests
+{
+    private readonly Assembly _assembly = typeof(LhContainerTests).Assembly;
+    private readonly List<string> _resourceNames = new();
+    private LhCodecService _service;
+
+    [SetUp]
+    public void Setup()
+    {
+        foreach (var name in _assembly.GetManifestResourceNames()) _resourceNames.Add(name);
+        var logger = new Logger<LhCodecService>(NullLoggerFactory.Instance);
+        _service = new LhCodecService(logger);
+    }
+
+    [Test]
+    public void TestHeader()
+    {
+        foreach (var resource in _resourceNames)
+        {
+            using var stream = _assembly.GetManifestResourceStream(resource);
+            if (stream == null) continue;
+
+            var files = LhCodecService.GetFiles(in stream);
+
+            Assert.Multiple(() =>
+            {
+                Assert.That(files, Is.Not.Empty);
+
+                foreach (var file in files)
+                {
+                    Assert.That(file.FileName, Is.Not.Null, "Filename is {0}", file.FileName);
+                    Assert.That(file.CompressedSize, Is.GreaterThan(0), "Compressed size is {0}", file.CompressedSize);
+                    Assert.That(file.UncompressedSize, Is.GreaterThan(0), "Uncompressed size is {0}", file.UncompressedSize);
+                    Assert.That(file.UncompressedSize, Is.GreaterThan(file.CompressedSize), "Uncompressed is larger than compressed");
+                    Assert.That(file.MethodId, Is.Not.Null, "Method id is {0}", file.MethodId);
+                    Assert.That(file.MethodId, Does.StartWith("-l"));
+                    Assert.That(file.MethodId, Does.EndWith("-"));
+                    Console.WriteLine($"Archive name: {file.FileName}, compression method: {file.MethodId}");
+                }
+            });
+        }
+    }
+}

fxl.codes.kisekae.data.test/LhMethodTests.cs

@@ -1,15 +0,0 @@
-namespace fxl.codes.kisekae.data.test;
-
-public class LhMethodTests
-{
-    [SetUp]
-    public void Setup()
-    {
-    }
-
-    [Test]
-    public void Test1()
-    {
-        Assert.Pass();
-    }
-}

fxl.codes.kisekae.data.test/fxl.codes.kisekae.data.test.csproj

@@ -23,4 +23,19 @@
         </Reference>
     </ItemGroup>
 
+    <ItemGroup>
+        <Folder Include="Examples\"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <None Remove="Examples\2RANMAS.lzh"/>
+        <EmbeddedResource Include="Examples\2RANMAS.lzh">
+            <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+        </EmbeddedResource>
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\fxl.codes.kisekae.data\fxl.codes.kisekae.data.csproj"/>
+    </ItemGroup>
+
 </Project>

fxl.codes.kisekae.data/Archives/Algorithms/HuffmanNode.cs

@@ -0,0 +1,35 @@
+namespace fxl.codes.kisekae.data.Archives.Algorithms;
+
+public class HuffmanNode
+{
+    public HuffmanNode(char value)
+    {
+    }
+
+    public HuffmanNode(HuffmanNode left, HuffmanNode right)
+    {
+        Left = left;
+        Left.Side = HuffmanNodeSide.Left;
+        Left.Parent = this;
+
+        Right = right;
+        Right.Side = HuffmanNodeSide.Right;
+        Right.Parent = this;
+
+        Weight = left.Weight + right.Weight;
+    }
+
+    public char? Value { get; set; }
+    public int Weight { get; set; } = 1;
+
+    public HuffmanNode? Parent { get; set; }
+    public HuffmanNode? Left { get; set; }
+    public HuffmanNode? Right { get; set; }
+    public HuffmanNodeSide? Side { get; set; }
+}
+
+public enum HuffmanNodeSide
+{
+    Left,
+    Right
+}

fxl.codes.kisekae.data/Archives/EndianUtility.cs

@@ -6,7 +6,7 @@ internal static class EndianUtility
 {
     public static int ToLittleEndian(this ReadOnlySpan<byte> bytes)
     {
-        var x = BitConverter.ToInt32(bytes);
+        var x = bytes.Length == 2 ? BitConverter.ToInt16(bytes) : BitConverter.ToInt32(bytes);
         return BitConverter.IsLittleEndian ? x : BinaryPrimitives.ReverseEndianness(x);
     }
 

fxl.codes.kisekae.data/Archives/LhCodecService.cs

@@ -1,4 +1,3 @@
-using fxl.codes.kisekae.data.Archives.LhHeaders;
 using fxl.codes.kisekae.data.Entities;
 using Microsoft.Extensions.Logging;
 
@@ -8,29 +7,13 @@ public class LhCodecService(ILogger<LhCodecService> logger)
 {
     public async Task<Kisekae?> ReadArchive(Stream stream)
     {
-        try
+        throw new NotImplementedException();
-        {
-            var header = new LhHeader(in stream);
-            switch (header.MethodId)
-            {
-                case "-lh0-": break;
-                case "-lzs-": break;
-                case "-lz4-": break;
-                case "-lh1-": break;
-                case "-lh2-": break;
-                case "-lh3-": break;
-                case "-lh4-": break;
-                case "-lh5-": break;
-                case "-lh6-": break;
-                case "-lh7-": break;
-                default: throw new Exception("Unknown method");
-            }
-        }
-        catch (Exception e)
-        {
-            logger.LogError(e, "Unable to open archive");
     }
 
-        return null;
+    internal static IEnumerable<LhContainer> GetFiles(ref readonly Stream stream)
+    {
+        var files = new List<LhContainer>();
+        while (stream.Position + 21 < stream.Length) files.Add(new LhContainer(in stream));
+        return files;
     }
 }

fxl.codes.kisekae.data/Archives/LhContainer.cs

@@ -1,19 +1,20 @@
 using System.Text;
 
-namespace fxl.codes.kisekae.data.Archives.LhHeaders;
+namespace fxl.codes.kisekae.data.Archives;
 
-internal class LhHeader
+internal class LhContainer
 {
-    public LhHeader(ref readonly Stream stream)
+    public LhContainer(ref readonly Stream stream)
     {
+        HeaderDataPosition = stream.Position;
         var bytes = new byte[21];
-        stream.Position = 0;
         stream.ReadExactly(bytes);
 
         var span = bytes.AsSpan();
         Level = span[20];
         MethodId = Encoding.ASCII.GetString(span[2..7]);
         CompressedSize = EndianUtility.ToLittleEndian(span[7..11]);
+        CompressedFile = new byte[CompressedSize];
         UncompressedSize = EndianUtility.ToLittleEndian(span[11..15]);
         Created = EndianUtility.ToDateTime(span[15..19]);
         FileOrDirectory = span[19];
@@ -36,7 +37,7 @@ internal class LhHeader
     public int HeaderSize { get; private set; }
     public int HeaderCheckSum { get; private set; }
     public string MethodId { get; private set; }
-    public int CompressedSize { get; private set; }
+    public int CompressedSize { get; }
     public int UncompressedSize { get; private set; }
     public DateTime Created { get; private set; }
     public int FileOrDirectory { get; private set; }
@@ -45,25 +46,33 @@ internal class LhHeader
 
     public string? FileName { get; private set; }
 
+    public long HeaderDataPosition { get; }
     public long FileDataPosition { get; private set; }
+    public byte[] CompressedFile { get; }
 
     private void Level0(ReadOnlySpan<byte> span, ref readonly Stream stream)
     {
         HeaderSize = span[0];
         HeaderCheckSum = span[1];
-        stream.Position = span.Length;
         FileName = GetFilename(in stream);
         Crc16 = (short)stream.ReadLittleEndian(2);
 
         FileDataPosition = stream.Position;
+        stream.ReadExactly(CompressedFile);
     }
 
     private void Level1(ReadOnlySpan<byte> span, ref readonly Stream stream)
     {
-        Level0(span, in stream);
+        HeaderSize = span[0];
+        HeaderCheckSum = span[1];
+        FileName = GetFilename(in stream);
+        Crc16 = (short)stream.ReadLittleEndian(2);
         OperatingSystem = (char)stream.ReadByte();
+
         SetExtendedHeaders(in stream);
+
         FileDataPosition = stream.Position;
+        stream.ReadExactly(CompressedFile);
     }
 
     private void Level2(ReadOnlySpan<byte> span, ref readonly Stream stream)
@@ -71,8 +80,11 @@ internal class LhHeader
         HeaderSize = span[..2].ToLittleEndian();
         Crc16 = (short)stream.ReadLittleEndian(2);
         OperatingSystem = (char)stream.ReadByte();
+
         SetExtendedHeaders(in stream);
+
         FileDataPosition = stream.Position;
+        stream.ReadExactly(CompressedFile);
     }
 
     private static string GetFilename(ref readonly Stream stream)

fxl.codes.kisekae.data/Archives/LhMethods/BaseLhMethod.cs

@@ -1,29 +1,32 @@
 using fxl.codes.kisekae.data.Archives.Algorithms;
-using fxl.codes.kisekae.data.Archives.LhHeaders;
 
 namespace fxl.codes.kisekae.data.Archives.LhMethods;
 
-internal abstract class BaseLhMethod(ref readonly Stream stream, LhHeader header, int slidingWindowBytes, int matchingWindowBytes, IAlgorithm? algorithm)
+internal abstract class BaseLhMethod(LhContainer container, int slidingWindowBytes, int matchingWindowBytes, IAlgorithm? algorithm)
 {
     public int SlidingWindow => slidingWindowBytes * 1024;
+
+    public void InitializeAlgorithm()
+    {
+    }
 }
 
-internal class Lzs(ref readonly Stream stream, LhHeader header) : BaseLhMethod(in stream, header, 2, 17, null);
+internal class Lzs(LhContainer container) : BaseLhMethod(container, 2, 17, null);
 
-internal class Lz4(ref readonly Stream stream, LhHeader header) : BaseLhMethod(in stream, header, 0, 0, null);
+internal class Lz4(LhContainer container) : BaseLhMethod(container, 0, 0, null);
 
-internal class Lh0(ref readonly Stream stream, LhHeader header) : BaseLhMethod(in stream, header, 0, 0, null);
+internal class Lh0(LhContainer container) : BaseLhMethod(container, 0, 0, null);
 
-internal class Lh1(ref readonly Stream stream, LhHeader header) : BaseLhMethod(in stream, header, 4, 60, new HuffmanDynamic());
+internal class Lh1(LhContainer container) : BaseLhMethod(container, 4, 60, new HuffmanDynamic());
 
-internal class Lh2(ref readonly Stream stream, LhHeader header) : BaseLhMethod(in stream, header, 8, 256, new HuffmanDynamic());
+internal class Lh2(LhContainer container) : BaseLhMethod(container, 8, 256, new HuffmanDynamic());
 
-internal class Lh3(ref readonly Stream stream, LhHeader header) : BaseLhMethod(in stream, header, 8, 256, new HuffmanStatic());
+internal class Lh3(LhContainer container) : BaseLhMethod(container, 8, 256, new HuffmanStatic());
 
-internal class Lh4(ref readonly Stream stream, LhHeader header) : BaseLhMethod(in stream, header, 4, 256, new HuffmanStatic());
+internal class Lh4(LhContainer container) : BaseLhMethod(container, 4, 256, new HuffmanStatic());
 
-internal class Lh5(ref readonly Stream stream, LhHeader header) : BaseLhMethod(in stream, header, 8, 256, new HuffmanStatic());
+internal class Lh5(LhContainer container) : BaseLhMethod(container, 8, 256, new HuffmanStatic());
 
-internal class Lh6(ref readonly Stream stream, LhHeader header) : BaseLhMethod(in stream, header, 32, 256, new HuffmanStatic());
+internal class Lh6(LhContainer container) : BaseLhMethod(container, 32, 256, new HuffmanStatic());
 
-internal class Lh7(ref readonly Stream stream, LhHeader header) : BaseLhMethod(in stream, header, 64, 256, new HuffmanStatic());
+internal class Lh7(LhContainer container) : BaseLhMethod(container, 64, 256, new HuffmanStatic());

fxl.codes.kisekae.data/fxl.codes.kisekae.data.csproj

@@ -19,4 +19,8 @@
         <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.4"/>
     </ItemGroup>
 
+    <ItemGroup>
+        <InternalsVisibleTo Include="fxl.codes.kisekae.data.test"/>
+    </ItemGroup>
+
 </Project>