public virtual void TestVerifyChunkedSumsByteArraySuccess()
{
AllocateArrayByteBuffers();
FillDataAndValidChecksums();
NativeCrc32.VerifyChunkedSumsByteArray(bytesPerChecksum, checksumType.id, ((byte[]
)checksums.Array()), checksums.Position(), ((byte[])data.Array()), data.Position
(), data.Remaining(), fileName, BasePosition);
}
public virtual void TestVerifyChunkedSumsByteArrayFail()
{
AllocateArrayByteBuffers();
FillDataAndInvalidChecksums();
exception.Expect(typeof(ChecksumException));
NativeCrc32.VerifyChunkedSumsByteArray(bytesPerChecksum, checksumType.id, ((byte[]
)checksums.Array()), checksums.Position(), ((byte[])data.Array()), data.Position
(), data.Remaining(), fileName, BasePosition);
}
/// <summary>Implementation of chunked verification specifically on byte arrays.</summary>
/// <remarks>
/// Implementation of chunked verification specifically on byte arrays. This
/// is to avoid the copy when dealing with ByteBuffers that have array backing.
/// </remarks>
/// <exception cref="Org.Apache.Hadoop.FS.ChecksumException"/>
private void VerifyChunkedSums(byte[] data, int dataOff, int dataLen, byte[] checksums
, int checksumsOff, string fileName, long basePos)
{
if (type.size == 0)
{
return;
}
if (NativeCrc32.IsAvailable())
{
NativeCrc32.VerifyChunkedSumsByteArray(bytesPerChecksum, type.id, checksums, checksumsOff
, data, dataOff, dataLen, fileName, basePos);
return;
}
int remaining = dataLen;
int dataPos = 0;
while (remaining > 0)
{
int n = Math.Min(remaining, bytesPerChecksum);
summer.Reset();
summer.Update(data, dataOff + dataPos, n);
dataPos += n;
remaining -= n;
int calculated = (int)summer.GetValue();
int stored = (checksums[checksumsOff] << 24 & unchecked ((int)(0xff000000))) | (checksums
[checksumsOff + 1] << 16 & unchecked ((int)(0xff0000))) | (checksums[checksumsOff
+ 2] << 8 & unchecked ((int)(0xff00))) | checksums[checksumsOff + 3] & unchecked (
(int)(0xff));
checksumsOff += 4;
if (calculated != stored)
{
long errPos = basePos + dataPos - n;
throw new ChecksumException("Checksum error: " + fileName + " at " + errPos + " exp: "
+ stored + " got: " + calculated, errPos);
}
}
}
