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InvFPIndexMerge.hpp

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/*==========================================================================
 * Copyright (c) 2001 Carnegie Mellon University.  All Rights Reserved.
 *
 * Use of the Lemur Toolkit for Language Modeling and Information Retrieval
 * is subject to the terms of the software license set forth in the LICENSE
 * file included with this software, and also available at
 * http://www.lemurproject.org/license.html
 *
 *==========================================================================
*/


#ifndef _INVFPINDEXMERGE_HPP
#define _INVFPINDEXMERGE_HPP

#include "common_headers.hpp"
#include "InvIndexMerge.hpp"
#include "InvFPDocList.hpp"
#include "InvFPTypes.hpp"

struct InvFPIndexReader {
  InvFPDocList* list;
  ifstream* reader;
};

// this class could actually be static
class InvFPIndexMerge : public InvIndexMerge {
public:
  InvFPIndexMerge(char* buffer, long size, long maxfilesize=2100000000);
  InvFPIndexMerge(long buffersize=64000000, long maxfilesize=2100000000);
  virtual ~InvFPIndexMerge();

  virtual int mergeFiles(vector<string>* files, vector<string>* intmed, int level);

  virtual int finalMerge(vector<string>* files);


private:
  void writeInvFIDs();
  void least(vector<InvFPIndexReader*>* r, vector<TERMID_T>* ret);
};

#endif

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