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Add support for reading zlib compressed Lua files #21

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Add support for reading zlib compressed Lua files #21

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28 changes: 26 additions & 2 deletions CoDLuaDecompiler.Decompiler/LuaFile/LuaFileFactory.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -57,9 +57,33 @@ public static ILuaFile Create(string filePath, bool usesDebugInfo = false)
}

using var stream = File.OpenRead(filePath);
using var reader = new BinaryReader(stream);
BinaryReader? reader;

int b1 = stream.ReadByte();
stream.Seek(0, SeekOrigin.Begin);

if (b1 == 0x78)
{
// zlib file, need decompress
byte[] buffer = new byte[0x1000];
using (MemoryStream ms = new MemoryStream())
using (ZLibStream zlibStream = new ZLibStream(stream, CompressionMode.Decompress, false))
{
int read;
while ((read = zlibStream.Read(buffer, 0, buffer.Length)) > 0)
{
ms.Write(buffer, 0, read);
}
reader = new BinaryReader(new MemoryStream(ms.ToArray()));
}

}
else
{
reader = new BinaryReader(stream);
}

return Create(reader, filePath, usesDebugInfo);
}
}
}
}