public static byte[] Decompress(byte[] b, bool hasMagic = true)
{
using (var br = new FileReader(new MemoryStream(b), true))
{
if (br.ReadString(4) == "ZCMP")
{
return(DecompressZCMP(b));
}
else
{
var ms = new System.IO.MemoryStream();
if (hasMagic)
{
br.Position = 2;
using (var ds = new DeflateStream(new MemoryStream(br.ReadBytes((int)br.BaseStream.Length - 6)), CompressionMode.Decompress))
ds.CopyTo(ms);
}
else
{
using (var ds = new DeflateStream(new MemoryStream(b), CompressionMode.Decompress))
ds.CopyTo(ms);
}
return(ms.ToArray());
}
}
}
public static Byte[] DecompressZCMP(byte[] b)
{
Console.WriteLine("DecompressZCMP");
using (var br = new FileReader(new MemoryStream(b), true))
{
var ms = new System.IO.MemoryStream();
br.BaseStream.Position = 130;
using (var ds = new DeflateStream(new MemoryStream(br.ReadBytes((int)br.BaseStream.Length - 80)), CompressionMode.Decompress))
ds.CopyTo(ms);
return(ms.ToArray());
}
}
public static byte[] ToBytes(this Stream stream)
{
using (var reader = new FileReader(stream, true))
{
return(reader.ReadBytes((int)stream.Length));
}
using (var memStream = new MemoryStream())
{
stream.CopyTo(memStream);
return(memStream.ToArray());
}
}
public static Stream Compress(Stream stream, bool isBigEndian = true)
{
uint decompSize = (uint)stream.Length;
uint[] section_sizes;
uint sectionCount = 0;
var mem = new MemoryStream();
using (var reader = new FileReader(stream, true))
using (var writer = new FileWriter(mem, true))
{
writer.SetByteOrder(isBigEndian);
if (!(decompSize % 0x10000 != 0))
{
sectionCount = decompSize / 0x10000;
}
else
{
sectionCount = (decompSize / 0x10000) + 1;
}
writer.Write(0x10000);
writer.Write(sectionCount);
writer.Write(decompSize);
writer.Write(new uint[sectionCount]);
writer.Align(128);
reader.SeekBegin(0);
section_sizes = new uint[sectionCount];
for (int i = 0; i < sectionCount; i++)
{
byte[] chunk = ZLIB.Compress(reader.ReadBytes(0x10000));
section_sizes[i] = (uint)chunk.Length;
writer.Write(chunk.Length);
writer.Write(chunk);
writer.Align(128);
}
writer.SeekBegin(12);
for (int i = 0; i < sectionCount; i++)
{
writer.Write(section_sizes[i] + 4);
}
}
return(mem);
}
