public static void Compress(byte[] dest, ref int destLength, byte[] source)
{
using (MemoryStream stream = new MemoryStream(dest, true))
{
using (ZLIBStream ds = new ZLIBStream(stream, CompressionMode.Compress, true))
{
ds.Write(source, 0, source.Length);
ds.Flush();
}
destLength = (int)stream.Position;
}
}
public static void ZLibDecompress(Stream stream, Stream tragetStream)
{
using (var zs = new ZLIBStream(stream, CompressionMode.Decompress, true)) {
int bytesLeidos = 0;
byte[] buffer = new byte[1024];
while ((bytesLeidos = zs.Read(buffer, 0, buffer.Length)) > 0)
{
tragetStream.Write(buffer, 0, bytesLeidos);
}
}
}
public static void Decompress(byte[] source, int sourceStart, int sourceLength, int offset, byte[] dest, int length)
{
using (MemoryStream stream = new MemoryStream(source, sourceStart, sourceLength - offset, true))
{
using (ZLIBStream ds = new ZLIBStream(stream, CompressionMode.Decompress))
{
for (int i = 0, b = ds.ReadByte(); i < length && b >= 0; i++, b = ds.ReadByte())
{
dest[i] = (byte)b;
}
}
}
}
public static unsafe void Decompress(IntPtr source, int sourceLength, int offset, IntPtr dest, int length)
{
using (UnmanagedMemoryStream stream = new UnmanagedMemoryStream((byte *)source.ToPointer(), sourceLength - offset))
{
using (ZLIBStream ds = new ZLIBStream(stream, CompressionMode.Decompress))
{
byte *dstPtr = (byte *)dest.ToPointer();
for (int i = 0, b = ds.ReadByte(); i < length && b >= 0; i++, b = ds.ReadByte())
{
dstPtr[i] = (byte)b;
}
}
}
}
public static void ZLibCompress(Stream stream, Stream targetStream, CompressionLevel?level = null)
{
using (var zs = new ZLIBStream(targetStream, level ?? CompressionLevel.Optimal, true)) {
int bytesLeidos = 0;
byte[] buffer = new byte[1024];
stream.Seek(0, SeekOrigin.Begin);
while ((bytesLeidos = stream.Read(buffer, 0, buffer.Length)) > 0)
{
zs.Write(buffer, 0, bytesLeidos);
}
}
using (var bw = new BinaryWriter(targetStream))
bw.Write((uint)stream.Length);
}