public uint GetFileCRC32(string path)
{
if (path == null)
{
throw new ArgumentNullException("path");
}
CrcHelper crc32 = new CrcHelper();
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.crc);
}
public uint GetStreamCRC32(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (!stream.CanRead)
{
throw new ArgumentException("stream is not readable.");
}
stream.Position = 0;
CrcHelper crc32 = new CrcHelper();
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.crc);
}