Add files via upload
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net5.0</TargetFramework>
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<RootNamespace>Islet_Online_Unpacker</RootNamespace>
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</PropertyGroup>
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</Project>
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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 16
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VisualStudioVersion = 16.0.34407.143
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Islet Online Unpacker", "Islet Online Unpacker.csproj", "{4B9BADD3-EE27-4AC6-8D4E-E5CAA2D2FAA1}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{4B9BADD3-EE27-4AC6-8D4E-E5CAA2D2FAA1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{4B9BADD3-EE27-4AC6-8D4E-E5CAA2D2FAA1}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{4B9BADD3-EE27-4AC6-8D4E-E5CAA2D2FAA1}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{4B9BADD3-EE27-4AC6-8D4E-E5CAA2D2FAA1}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {0969BADB-BDC0-4879-9427-A89BCF47474B}
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EndGlobalSection
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EndGlobal
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using System.IO;
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using System.IO.Compression;
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namespace Islet_Online_Unpacker
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{
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static class Program
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{
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static void Main(string[] args)
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{
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using FileStream source = File.OpenRead(args[0]);
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BinaryReader br = new(source);
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Directory.CreateDirectory(Path.GetDirectoryName(source.Name) + "//" + Path.GetFileNameWithoutExtension(source.Name));
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while (br.BaseStream.Position < br.BaseStream.Length)
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{
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int size = br.ReadInt32();
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if (size == 0x100)
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{
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br.BaseStream.Position -= 4;
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break;
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};
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br.BaseStream.Position += size;
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}
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System.Collections.Generic.List<SUBFILE> subfiles = new();
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while (br.BaseStream.Position < br.BaseStream.Length - 0x28)
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{
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SUBFILE subfile = new()
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{
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isCompressed = br.ReadInt32(),
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sizeUncompressed = br.ReadInt32(),
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sizeCompressed = br.ReadInt32(),
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offset = br.ReadInt32()
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};
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br.ReadBytes(20);
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subfile.name = new(br.ReadChars(br.ReadInt16()));
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subfiles.Add(subfile);
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}
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foreach (SUBFILE sub in subfiles)
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{
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br.BaseStream.Position = sub.offset;
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int size = br.ReadInt32();
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if ((sub.isCompressed == 0 && size != sub.sizeUncompressed) || (sub.isCompressed == 0x100 && size != sub.sizeCompressed))
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throw new System.Exception("Fuck.");
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if (sub.name.Contains(@"\"))
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Directory.CreateDirectory(Path.GetDirectoryName(source.Name) + "//" + Path.GetDirectoryName(sub.name));
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using FileStream FS = File.Create(Path.GetDirectoryName(source.Name) + "//" + sub.name);
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BinaryWriter bw = new(FS);
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if (sub.isCompressed == 0x100)
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{
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MemoryStream ms = new();
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br.ReadInt16();
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using (var ds = new DeflateStream(new MemoryStream(br.ReadBytes(size)), CompressionMode.Decompress))
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ds.CopyTo(ms);
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br = new(ms);
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br.BaseStream.Position = 0;
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bw.Write(br.ReadBytes(sub.sizeUncompressed));
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br = new(source);
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continue;
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}
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bw.Write(br.ReadBytes(size));
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bw.Close();
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}
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}
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struct SUBFILE
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{
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public int isCompressed;
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public int sizeUncompressed;
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public int sizeCompressed;
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public int offset;
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public string name;
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}
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}
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}
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