public void WriteLZSS(byte[] bytes, bool inPAA = false)
{
if (bytes.Length < 1024 && !inPAA) //data is always compressed in PAAs
{
Write(bytes);
}
else
{
var csum = inPAA ? bytes.Sum(e => (int)(sbyte)e) : bytes.Sum(e => (int)(byte)e);
using (var lzss = new LzssStream(BaseStream, System.IO.Compression.CompressionMode.Compress, true))
{
lzss.Write(bytes, 0, bytes.Length);
}
Write(BitConverter.GetBytes(csum));
}
}
public void PackFolder(string path, string arcfile)
{
entryInfos = new List <EntryInfo>();
foreach (string file in Directory.EnumerateFiles(path))
{
EntryInfo info = new EntryInfo();
info.Path = file;
info.Name = Path.GetFileName(file);
entryInfos.Add(info);
}
FileStream output = new FileStream(arcfile, FileMode.Create);
BinaryWriter writer = new BinaryWriter(output);
// Write dummy header
writer.Write(0);
foreach (EntryInfo info in entryInfos)
{
writer.Write((byte)0);
for (int i = 0; i < info.Name.Length; i++)
{
writer.Write((byte)0);
}
writer.Write(0);
writer.Write(0);
writer.Write(0);
}
uint tableSize = (uint)output.Length - sizeof(uint);
// Write entry data
for (int i = 0; i < entryInfos.Count; i++)
{
EntryInfo info = entryInfos[i];
Console.WriteLine("Adding {0}", info.Name);
FileStream input = new FileStream(info.Path, FileMode.Open);
BinaryReader reader = new BinaryReader(input);
MemoryStream memory = new MemoryStream();
LzssStream lzss = new LzssStream(memory, CompressionMode.Compress);
byte[] buffer = reader.ReadBytes((int)input.Length);
lzss.Write(buffer);
info.Size = (uint)input.Length;
info.CompressSize = (uint)memory.Length;
info.Offset = (uint)output.Length;
entryInfos[i] = info;
input.Close();
writer.Write(memory.GetBuffer());
}
// Write header
Console.WriteLine("Creating header...");
output.Seek(0, SeekOrigin.Begin);
writer.Write(tableSize);
foreach (EntryInfo info in entryInfos)
{
writer.Write((byte)info.Name.Length);
byte[] nameBytes = Encoding.ASCII.GetBytes(info.Name);
for (int i = 0; i < nameBytes.Length; i++)
{
nameBytes[i] -= (byte)(nameBytes.Length - i);
}
writer.Write(nameBytes);
writer.Write(SwapUInt32(info.CompressSize));
writer.Write(SwapUInt32(info.Size));
writer.Write(SwapUInt32(info.Offset));
}
output.Close();
entryInfos.Clear();
Console.WriteLine("Finished");
}