public byte[] GetFileFromIndex(int index)
{
FileListTab file = Table20.FileList[index];
string name = file.Path.GetText();
DirectoryListTab dir = file.Directory;
DirectoryOffsetTable dirOffset = dir.DirOffset;
FileOffsetTab offsetInfo = file.FileOffset;
bool isLink = false;
if (file.IsLink)
{
isLink = true;
while (file.IsLink)
{
file = file.FileOffset.File;
}
dir = file.Directory;
dirOffset = dir.DirOffset;
offsetInfo = file.FileOffset;
}
if (offsetInfo.Flag3)
{
dirOffset = offsetInfo.LinkedDirOffset;
offsetInfo = offsetInfo.LinkedOffset;
}
if (isLink)
{
return(new byte[0]);
}
if (offsetInfo.Size == 0)
{
return(new byte[0]);
}
long offset = Header.Field10 + dirOffset.Offset + offsetInfo.Offset * 4;
var data = new byte[offsetInfo.Size];
Stream.Position = offset;
if (offsetInfo.SizeCompressed == 0 || offsetInfo.SizeCompressed == offsetInfo.Size)
{
Stream.Read(data, 0, offsetInfo.Size);
}
else
{
using (var compStream = new ZstandardStream(Stream, CompressionMode.Decompress, true))
{
compStream.Read(data, 0, offsetInfo.Size);
}
}
return(data);
}
private Span <byte> DecompressBlock(IStorage input)
{
// decompress
using (var decompressionStream = new ZstandardStream(input.AsStream(), CompressionMode.Decompress))
{
decompressionStream.Read(decompressBuff, 0, bs);
return(new Span <byte>(decompressBuff));
}
}
private (byte[] table20, byte[] table28) GetTables()
{
var reader = new BinaryReader(Stream);
reader.BaseStream.Position = Header.Field20;
if (reader.ReadInt32() < 0x100) // heuristic for detecting compressed tables
{
reader.BaseStream.Position = Header.Field20;
var header20 = new CompressedTableHeader(reader);
var table20 = new byte[header20.Size];
reader.BaseStream.Position = Header.Field28;
var header28 = new CompressedTableHeader(reader);
var table28 = new byte[header28.Size];
reader.BaseStream.Position = Header.Field20 + header20.DataOffset;
using (var compStream = new ZstandardStream(Stream, CompressionMode.Decompress, true))
{
compStream.Read(table20, 0, table20.Length);
}
reader.BaseStream.Position = Header.Field28 + header28.DataOffset;
using (var compStream = new ZstandardStream(Stream, CompressionMode.Decompress, true))
{
compStream.Read(table28, 0, table28.Length);
}
return(table20, table28);
}
else
{
reader.BaseStream.Position = Header.Field20;
int table20Length = reader.ReadInt32();
reader.BaseStream.Position = Header.Field20;
byte[] table20 = reader.ReadBytes(table20Length);
reader.BaseStream.Position = Header.Field28;
int table28Length = reader.ReadInt32();
reader.BaseStream.Position = Header.Field28;
byte[] table28 = reader.ReadBytes(table28Length);
return(table20, table28);
}
}
public static LeaderboardData FromCompressedData(byte[] compressedBuffer)
{
Program.Log("Decompressing...");
byte[] data = new byte[LENGTH_DATA];
MemoryStream ms = new MemoryStream(compressedBuffer);
ZstandardStream zs = new ZstandardStream(ms, System.IO.Compression.CompressionMode.Decompress);
int read = zs.Read(data, 0, LENGTH_DATA);
if (zs.ReadByte() != -1)
{
throw new Exception("Decompressed data continues beyond LENGTH_DATA!");
}
zs.Close();
ms.Close();
Program.Log("Finished decompression.");
return(FromRawData(data));
}
