public static uint GetCrc32(byte[] buffer, int offset, int length)
{
var crc32 = new QwCrc32();
crc32.Update(buffer, offset, length);
return(crc32.Value);
}
public static uint GetFileCrc32(string path)
{
if (path == null)
{
throw new ArgumentNullException("path");
}
var crc32 = new QwCrc32();
var buf = new byte[4096];
using (var fs = new FileStream(path, FileMode.Open))
{
int len = 0;
while ((len = fs.Read(buf, 0, buf.Length)) != 0)
{
crc32.Update(buf, 0, len);
}
}
return(crc32.Value);
}
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;
QwCrc32 crc32 = new QwCrc32();
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);
}