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HammingWordDistance.h
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1 /*
2  * This program is free software; you can redistribute it and/or modify
3  * it under the terms of the GNU General Public License as published by
4  * the Free Software Foundation; either version 3 of the License, or
5  * (at your option) any later version.
6  *
7  * Written (W) 2007-2009 Christian Gehl
8  * Written (W) 1999-2009 Soeren Sonnenburg
9  * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
10  */
11 
12 #ifndef _HAMMINGWORDDISTANCE_H___
13 #define _HAMMINGWORDDISTANCE_H___
14 
15 #include <shogun/lib/common.h>
19 
20 namespace shogun
21 {
22  template <class T> class CStringFeatures;
23 
25 class CHammingWordDistance: public CStringDistance<uint16_t>
26 {
27  public:
30 
36 
44  virtual ~CHammingWordDistance();
45 
52  virtual bool init(CFeatures* l, CFeatures* r);
53 
55  virtual void cleanup();
56 
62 
67  virtual const char* get_name() const { return "HammingWordDistance"; }
68 
69  protected:
73  float64_t compute(int32_t idx_a, int32_t idx_b);
74 
75  private:
76  void init();
77 
78  protected:
80  bool use_sign;
81 };
82 } // namespace shogun
83 #endif /* _HAMMINGWORDDISTANCE_H___ */

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