public static uint 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;
while ((len = stream.Read(buf, 0, buf.Length)) != 0)
{
crc32.Update(buf, 0, len);
}
stream.Position = 0;
return crc32.Value;
}
public static uint GetFileCrc32(string path)
{
if (path == null)
throw new ArgumentNullException("path");
Crc32 crc32 = new Crc32();
byte[] buf = new byte[4096];
using (FileStream fs = new FileStream(path, FileMode.Open))
{
int len;
while ((len = fs.Read(buf, 0, buf.Length)) != 0)
{
crc32.Update(buf, 0, len);
}
}
return crc32.Value;
}