public static uint CalculateCrc(byte[] buffer, int length)
{
uint num = uint.MaxValue;
uint polynomial = 3988292384u;
bool flag = SupportClass.crcLookupTable == null;
if (flag)
{
SupportClass.crcLookupTable = SupportClass.InitializeTable(polynomial);
}
for (int i = 0; i < length; i++)
{
num = (num >> 8 ^ SupportClass.crcLookupTable[(int)((uint)buffer[i] ^ (num & 255u))]);
}
return(num);
}
