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Add LZSS support for PackType=1 (original code only handled BMR) #196

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Add LZSS support for PackType=1 (original code only handled BMR) #196

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8a6afe6
Update ArcLINK.cs
diandianxz May 25, 2026
a7fd090
test
diandianxz May 25, 2026
0b94b9d
Update ArcLINK.cs
diandianxz May 25, 2026
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56 changes: 41 additions & 15 deletions ArcFormats/Kaguya/ArcLINK.cs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
//! \file ArcLINK.cs
//! \file ArcLINK.cs
//! \date Fri Jan 22 18:44:56 2016
//! \brief KaGuYa archive format.
//
Expand Down Expand Up @@ -34,6 +34,7 @@ namespace GameRes.Formats.Kaguya
internal class LinkEntry : PackedEntry
{
public bool IsEncrypted;
public int PackType;
}

internal class LinkArchive : ArcFile
Expand Down Expand Up @@ -110,13 +111,28 @@ public override Stream OpenEntry (ArcFile arc, Entry entry)
return base.OpenEntry (arc, entry);
return larc.Encryption.DecryptEntry (larc, lent);
}
using (var input = arc.File.CreateStream (entry.Offset, entry.Size))
using (var bmr = new BmrDecoder (input))
{
bmr.Unpack();
return new BinMemoryStream (bmr.Data, entry.Name);
}
}
using (var input = arc.File.CreateStream (entry.Offset, entry.Size))
{
if (lent.PackType == 2)
{
using (var bmr = new BmrDecoder (input))
{
bmr.Unpack();
return new BinMemoryStream (bmr.Data, entry.Name);
}
}
else if (lent.PackType == 1) //LZSS
{
using (var lz_input = arc.File.CreateStream(entry.Offset + 4, entry.Size - 4, entry.Name))
using (var lz = new LzReader(lz_input.AsStream, entry.Size - 4, lent.UnpackedSize))
{
lz.Unpack();
return new BinMemoryStream (lz.Data, entry.Name);
}
}
}
return base.OpenEntry (arc, entry);
}

internal ArcFile ReadOldIndex (ArcView file)
{
Expand Down Expand Up @@ -211,13 +227,22 @@ public List<Entry> ReadIndex ()
entry.Size = size - (uint)(entry.Offset - base_offset);
if (is_compressed)
{
m_input.Read (header, 0, 4);
if (header.AsciiEqual ("BMR"))
{
entry.IsPacked = true;
entry.UnpackedSize = m_input.ReadUInt32();
}
}
entry.PackType = flags & 3;
if (entry.PackType == 2) // BMR
{
m_input.Read (header, 0, 4);
if (header.AsciiEqual ("BMR"))
{
entry.IsPacked = true;
entry.UnpackedSize = m_input.ReadUInt32();
}
}
else if (entry.PackType == 1) // LZSS
{
entry.IsPacked = true;
entry.UnpackedSize = m_input.ReadUInt32();
}
}
entry.IsEncrypted = (flags & 4) != 0;
m_has_encrypted = m_has_encrypted || entry.IsEncrypted;
dir.Add (entry);
Expand Down Expand Up @@ -466,6 +491,7 @@ public void Dispose ()
#endregion
}


internal abstract class ParamsDeserializer
{
protected IBinaryStream m_input;
Expand Down