iblob.h
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1 /*
2  * Copyright (C) 2007-2008 Tommi Maekitalo
3  * Copyright (C) 2007-2008 Marc Boris Duerner
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * As a special exception, you may use this file as part of a free
11  * software library without restriction. Specifically, if other files
12  * instantiate templates or use macros or inline functions from this
13  * file, or you compile this file and link it with other files to
14  * produce an executable, this file does not by itself cause the
15  * resulting executable to be covered by the GNU General Public
16  * License. This exception does not however invalidate any other
17  * reasons why the executable file might be covered by the GNU Library
18  * General Public License.
19  *
20  * This library is distributed in the hope that it will be useful,
21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23  * Lesser General Public License for more details.
24  *
25  * You should have received a copy of the GNU Lesser General Public
26  * License along with this library; if not, write to the Free Software
27  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28  */
29 
30 #ifndef TNTDB_IFACE_IBLOB_H
31 #define TNTDB_IFACE_IBLOB_H
32 
33 #include <cxxtools/refcounted.h>
34 #include <cstddef>
35 #include <cstring>
36 
37 namespace tntdb
38 {
39 
51 {
52  public:
55  virtual ~IBlob();
56 
62  virtual void assign(const char* data, std::size_t len) = 0;
63 
66  virtual char* reserve(std::size_t len, bool shrink) = 0;
67 
74  virtual IBlob* create() const = 0;
75 
80  virtual void destroy() = 0;
81 
84  std::size_t size() const
85  { return _size; }
86 
89  const char* data() const
90  { return _data; }
91 
94  bool operator==(const IBlob& other) const
95  {
96  return _size == other._size &&
97  ( std::strncmp(_data, other._data, _size) == 0 );
98  }
99 
100  protected:
102  : _data(0)
103  , _size(0)
104  { }
105 
106  char* _data;
107  std::size_t _size;
108 };
109 
110 }
111 
112 #endif