private void Flush()
{
if (Count == 0)
{
return;
}
string filePath = Path.Combine(WorkingPath, $"{BlockCount}.idx");
using (SearchIndexSliceWriter writer = new SearchIndexSliceWriter(new BufferedWriter(File.Create(filePath), WriterBuffer), WordCount))
{
for (int wordIndex = 0; wordIndex < WordCount; ++wordIndex)
{
int matchIndex = FirstWordMatch[wordIndex];
while (matchIndex != -1)
{
writer.WritePosition(MatchPositions[matchIndex]);
matchIndex = NextMatchIndex[matchIndex];
}
writer.NextWord();
}
}
BlockCount++;
Reset();
}
private void Merge()
{
if (BlockCount == 1)
{
if (File.Exists(OutputPath))
{
File.Delete(OutputPath);
}
File.Move(Path.Combine(WorkingPath, "0.idx"), OutputPath);
Directory.Delete(WorkingPath, true);
return;
}
SearchIndexSliceWriter writer = new SearchIndexSliceWriter(new BufferedWriter(File.Create(OutputPath), WriterBuffer), WordCount);
SearchIndexReader[] readers = new SearchIndexReader[BlockCount];
try
{
for (int i = 0; i < readers.Length; ++i)
{
readers[i] = new SearchIndexReader(Path.Combine(WorkingPath, $"{i}.idx"));
}
long[] positions = new long[256];
for (int wordIndex = 0; wordIndex < WordCount; ++wordIndex)
{
for (int readerIndex = 0; readerIndex < readers.Length; ++readerIndex)
{
SearchResult result = readers[readerIndex].Find(wordIndex);
while (!result.Done)
{
int count = result.Page(ref positions);
for (int i = 0; i < count; ++i)
{
writer.WritePosition(positions[i]);
}
}
}
writer.NextWord();
}
}
finally
{
for (int i = 0; i < readers.Length; ++i)
{
if (readers[i] != null)
{
readers[i].Dispose();
readers[i] = null;
}
}
if (writer != null)
{
writer.Dispose();
writer = null;
}
Directory.Delete(WorkingPath, true);
}
}