private static int CheckZlibTail(byte[] array, int offset, int count, byte[] uncompressData)
{
ulong num = 1uL;
num = Zlib.Adler32(num, uncompressData);
byte[] bytes = BitConverter.GetBytes((uint)num);
Array.Reverse(bytes);
for (int i = 0; i < 4; i++)
{
if (array[offset + count - 1 - i] != bytes[3 - i])
{
return(-1);
}
}
return(0);
}
public static byte[] Compress(byte[] array, int offset, int count)
{
if (array == null)
{
throw new ArgumentNullException("array");
}
if (offset < 0)
{
throw new ArgumentOutOfRangeException("offset");
}
if (count < 0)
{
throw new ArgumentOutOfRangeException("count");
}
if (array.Length - offset < count)
{
throw new ArgumentException("Invalid argument offset count");
}
MemoryStream memoryStream = new MemoryStream();
using (DeflateStream deflateStream = new DeflateStream(memoryStream, CompressionMode.Compress, true))
{
deflateStream.Write(array, offset, count);
}
byte[] array2 = new byte[memoryStream.Length];
memoryStream.Seek(0L, SeekOrigin.Begin);
memoryStream.Read(array2, 0, array2.Length);
memoryStream.Dispose();
ulong num = 1uL;
num = Zlib.Adler32(num, array);
byte[] array3 = new byte[]
{
120,
1
};
byte[] bytes = BitConverter.GetBytes((uint)num);
Array.Reverse(bytes);
byte[] array4 = new byte[array3.Length + array2.Length + bytes.Length];
array3.CopyTo(array4, 0);
array2.CopyTo(array4, array3.Length);
bytes.CopyTo(array4, array3.Length + array2.Length);
return(array4);
}
