77 lines
2.8 KiB
C#
77 lines
2.8 KiB
C#
//Written for Islet Online. https://store.steampowered.com/app/428180/
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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 input = File.OpenRead(args[0]);
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BinaryReader br = new(input);
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Directory.CreateDirectory(Path.GetDirectoryName(input.Name) + "//" + Path.GetFileNameWithoutExtension(input.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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start = 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.start;
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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(input.Name) + "//" + Path.GetDirectoryName(sub.name));
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using FileStream FS = File.Create(Path.GetDirectoryName(input.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(FS);
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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 start;
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public string name;
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}
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}
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}
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