static public int Compute(byte[] data, int offset, int count)
{
var crc = new OptimizedCRC();
crc.Update(data, offset, count);
return(crc.Value);
}
/// <summary>
/// Get the CRC32 hash for a file, if possible
/// </summary>
/// <param name="file">Path to the file</param>
/// <returns>String representation of the CRC32 hash of the file</returns>
private string GetCRCFromFile(string file)
{
using (OptimizedCRC crc = new OptimizedCRC())
using (BinaryReader reader = new BinaryReader(File.OpenRead(file)))
{
byte[] buffer = new byte[8 * 1024];
int read = Int32.MaxValue;
while ((read = reader.Read(buffer, 0, buffer.Length)) > 0)
{
crc.Update(buffer, 0, read);
}
crc.Update(buffer, 0, 0);
byte[] crcHash = BitConverter.GetBytes(crc.Value).Reverse().ToArray();
return(ByteArrayToString(crcHash));
}
}