private static Slice?DecodeEntry(Slice p, out uint shared, out uint non_shared, out uint value_length)
{
if (p.Length < 3)
{
shared = 0;
non_shared = 0;
value_length = 0;
return(null);
}
shared = p[0];
non_shared = p[1];
value_length = p[2];
if ((shared | non_shared | value_length) < 128)
{
// Fast path: all three values are encoded in one byte each
return(p.NewSlice(3));
}
else
{
shared = Coding.DecodeVarint32(p);
non_shared = Coding.DecodeVarint32(p);
value_length = Coding.DecodeVarint32(p);
if (p.Length < non_shared + value_length)
{
return(null);
}
return(p);
}
}
private void ReadNewFile(Slice slice)
{
var level = Coding.DecodeVarint32(slice);
var fileNr = Coding.DecodeVarint64(slice);
var fileSize = Coding.DecodeVarint64(slice);
var smallest = new Key(Coding.DecodeLengthPrefixed(slice));
var largest = new Key(Coding.DecodeLengthPrefixed(slice));
m_files.Add(new TableFile(level, fileNr, fileSize, smallest, largest));
}
public void Add(Record record)
{
var actionDict = new Action <Slice>[]
{
Error,
ReadComparator,
ReadLogNumber,
ReadNextFileNumber,
ReadLastSequence,
ReadCompactPointer,
ReadDeletedFiled,
ReadNewFile,
Error,
ReadPrevLogNumber,
};
var slice = new Slice(record.Bytes);
while (slice.Length > 0)
{
var type = Coding.DecodeVarint32(slice);
actionDict[type].Invoke(slice);
}
}
private void ReadDeletedFiled(Slice slice)
{
var level = Coding.DecodeVarint32(slice);
var fileNr = Coding.DecodeVarint64(slice);
}
private void ReadCompactPointer(Slice slice)
{
var level = Coding.DecodeVarint32(slice);
var pointer = Coding.DecodeLengthPrefixed(slice);
}