public static byte[] GetStreamCRC32(Stream stream)
{
if ( stream == null )
throw new ArgumentNullException("stream");
if ( !stream.CanRead )
throw new ArgumentException("stream is not readable.");
stream.Position = 0;
Crc32 crc32 = new Crc32();
byte[] buf = new byte[4096];
int len = 0;
while ( (len = stream.Read(buf, 0, buf.Length)) != 0 )
{
crc32.Update(buf, 0, len);
}
stream.Position = 0;
return crc32.Value;
}
public static byte[] GetFileCRC32(string path)
{
if ( path == null )
throw new ArgumentNullException("path");
Crc32 crc32 = new Crc32();
byte[] buf = new byte[4096];
int len = 0;
using ( FileStream fs = new FileStream(path, FileMode.Open) )
{
while ( (len = fs.Read(buf, 0, buf.Length)) != 0 )
{
crc32.Update(buf, 0, len);
}
}
return crc32.Value;
}