cpp/galago/include/BinOrderedBinnedIterator.hpp

   1
   2 //
   3 // BinOrderedBinnedIterator
   4 //
   5 // 6 January 2007 -- tds
   6 //
   7
   8 #ifndef GALAGO_BINORDEREDBINNEDTITERATOR_HPP
   9 #define GALAGO_BINORDEREDBINNEDTITERATOR_HPP
  10
  11 #include "indri/indri-platform.h"
  12 #include "indri/greedy_vector"
  13
  14 class BinOrderedBinnedIterator {
  15 private:
  16     struct BinInfo {
  17         UINT32 bin;
  18
  19         UINT64 binStart;
  20         UINT64 binLength;
  21         UINT64 dataStart;
  22         UINT64 dataLength;
  23         UINT64 skipStart;
  24         UINT64 skipLength;
  25     };
  26
  27     const char* invertedData;
  28
  29     indri::utility::greedy_vector<BinInfo> _termBins;
  30     int _termBinIndex;
  31     UINT64 _postingsLength;
  32     UINT64 _documentCount;
  33
  34     const BinInfo& _currentBinInfo() const;
  35
  36     void _readTermHeader( UINT64 startPosition, UINT64 endPosition );
  37
  38 public:
  39     BinOrderedBinnedIterator( const char* data, UINT64 start, UINT64 end );
  40
  41     int bin();
  42     bool next();
  43     void reset();
  44
  45     const char* binData();
  46     UINT64 binDataLength();
  47     const char* skipData();
  48     UINT64 skipDataLength();
  49     UINT64 postingsDataLength() const;
  50     UINT64 documentCount() const;
  51 };
  52
  53 #endif // GALAGO_BINORDEREDBINNEDTITERATOR_HPP