internal void Seek(long pointer, long p, Term t, TermInfo ti)
{
input.Seek(pointer);
position = p;
termBuffer.Set(t);
prevBuffer.Reset();
termInfo.Set(ti);
}
/// <summary>Increments the enumeration to the next element. True if one exists.</summary>
public override bool Next()
{
if (position++ >= size - 1)
{
prevBuffer.Set(termBuffer);
termBuffer.Reset();
return(false);
}
prevBuffer.Set(termBuffer);
termBuffer.Read(input, fieldInfos);
termInfo.docFreq = input.ReadVInt(); // read doc freq
termInfo.freqPointer += input.ReadVLong(); // read freq pointer
termInfo.proxPointer += input.ReadVLong(); // read prox pointer
if (format == -1)
{
// just read skipOffset in order to increment file pointer;
// value is never used since skipTo is switched off
if (!isIndex)
{
if (termInfo.docFreq > formatM1SkipInterval)
{
termInfo.skipOffset = input.ReadVInt();
}
}
}
else
{
if (termInfo.docFreq >= skipInterval)
{
termInfo.skipOffset = input.ReadVInt();
}
}
if (isIndex)
{
indexPointer += input.ReadVLong(); // read index pointer
}
return(true);
}
/// <summary>Optimized scan, without allocating new terms.
/// Return number of invocations to next().
/// </summary>
internal int ScanTo(Term term)
{
scanBuffer.Set(term);
int count = 0;
while (scanBuffer.CompareTo(termBuffer) > 0 && Next())
{
count++;
}
return(count);
}