public void CompareFastCrcWithSlowCrc()
{
long slowParserTime = TimeIt(5, @"TestData\large_file.fit", (stream) =>
{
int crc = 0;
using (var reader = new BinaryReader(stream))
{
for (int i = 0; i < stream.Length - 2; i++)
{
crc = CRC.Get16(crc, reader.ReadByte());
}
ushort fileCrc = reader.ReadUInt16();
Assert.AreEqual(fileCrc, crc);
}
});
Console.WriteLine("CRC via Dynastream CRC16 implementation = {0}ms", slowParserTime);
long fastParserTime = TimeIt(5, @"TestData\large_file.fit", (stream) =>
{
using (var reader = new BinaryReader(stream))
{
ushort crc = Crc16.ComputeCrc(reader, stream.Length - 2);
ushort fileCrc = reader.ReadUInt16();
Assert.AreEqual(fileCrc, crc);
}
});
Console.WriteLine("CRC via 64 bit 8x256 CRC16 implementation = {0}ms", fastParserTime);
Console.WriteLine("64 bit 8x256 CRC16 implementation is {0:0.0}x faster", (double)((double)slowParserTime / (double)fastParserTime));
}
public void TestSimpleStrings()
{
Assert.AreEqual(CrcTestData.SimpleStrings.Length, CrcTestData.SimpleStringsCrcs.Length);
for (int i = 0; i < CrcTestData.SimpleStrings.Length; i++)
{
byte[] bytes = Encoding.UTF8.GetBytes(CrcTestData.SimpleStrings[i]);
using (var stream = new MemoryStream(bytes))
{
using (var reader = new BinaryReader(stream))
{
ushort crc = Crc16.ComputeCrc(reader, bytes.Length);
Assert.AreEqual(CrcTestData.SimpleStringsCrcs[i], crc, "CRC16 for {0}", CrcTestData.SimpleStrings[i]);
}
}
}
}
