public override Stream OpenEntry(ArcFile arc, Entry entry)
{
var xp3_entry = entry as Xp3Entry;
if (null == xp3_entry)
{
return(arc.File.CreateStream(entry.Offset, entry.Size));
}
Stream input;
if (1 == xp3_entry.Segments.Count && !xp3_entry.IsEncrypted)
{
var segment = xp3_entry.Segments.First();
if (segment.IsCompressed)
{
input = new ZLibStream(arc.File.CreateStream(segment.Offset, segment.PackedSize),
CompressionMode.Decompress);
}
else
{
input = arc.File.CreateStream(segment.Offset, segment.Size);
}
}
else
{
input = new Xp3Stream(arc.File, xp3_entry);
}
return(xp3_entry.Cipher.EntryReadFilter(xp3_entry, input));
}
public override Stream OpenEntry(ArcFile arc, Entry entry)
{
var xp3_entry = entry as Xp3Entry;
if (null == xp3_entry)
{
return(arc.File.CreateStream(entry.Offset, entry.Size));
}
Stream input;
if (1 == xp3_entry.Segments.Count && !xp3_entry.IsEncrypted)
{
var segment = xp3_entry.Segments.First();
if (segment.IsCompressed)
{
input = new ZLibStream(arc.File.CreateStream(segment.Offset, segment.PackedSize),
CompressionMode.Decompress);
}
else
{
input = arc.File.CreateStream(segment.Offset, segment.Size);
}
}
else
{
input = new Xp3Stream(arc.File, xp3_entry);
}
if (xp3_entry.UnpackedSize <= 5 || "audio" == entry.Type)
{
return(input);
}
var header = new byte[5];
input.Read(header, 0, 5);
if (0x184D2204 == header.ToInt32(0)) // LZ4 magic
{
// assume no scripts are compressed using LZ4, return decompressed stream right away
return(DecompressLz4(xp3_entry, header, input));
}
if (0xFE == header[0] && 0xFE == header[1] && header[2] < 3 && 0xFF == header[3] && 0xFE == header[4])
{
return(DecryptScript(header[2], input, xp3_entry.UnpackedSize));
}
if (!input.CanSeek)
{
return(new PrefixStream(header, input));
}
input.Position = 0;
return(input);
}
