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StringFileFeatures.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) 2009 Soeren Sonnenburg
8  * Copyright (C) 2009 Berlin Institute of Technology
9  */
10 
11 #ifndef _CSTRINGFILEFEATURES__H__
12 #define _CSTRINGFILEFEATURES__H__
13 
18 #include <shogun/io/SGIO.h>
19 
20 namespace shogun
21 {
22 class CAlphabet;
23 template <class T> class CMemoryMappedFile;
24 
34 template <class ST> class CStringFileFeatures : public CStringFeatures<ST>
35 {
36  public:
37 
42 
48  CStringFileFeatures(const char* fname, EAlphabet alpha);
49 
53  virtual ~CStringFileFeatures();
54 
59  virtual const char* get_name() const { return "StringFileFeatures"; }
60 
61  protected:
76  ST* get_line(uint64_t& len, uint64_t& offs, int32_t& line_nr, uint64_t file_length);
77 
79  virtual void cleanup();
80 
82  virtual void cleanup_feature_vector(int32_t num);
83 
88  void fetch_meta_info_from_file(int32_t granularity=1048576);
89 
90  protected:
93 };
94 }
95 #endif // _CSTRINGFILEFEATURES__H__

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