blobstream.h
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1 /*
2  * Copyright (C) 2011 Tommi Maekitalo
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * As a special exception, you may use this file as part of a free
10  * software library without restriction. Specifically, if other files
11  * instantiate templates or use macros or inline functions from this
12  * file, or you compile this file and link it with other files to
13  * produce an executable, this file does not by itself cause the
14  * resulting executable to be covered by the GNU General Public
15  * License. This exception does not however invalidate any other
16  * reasons why the executable file might be covered by the GNU Library
17  * General Public License.
18  *
19  * This library is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22  * Lesser General Public License for more details.
23  *
24  * You should have received a copy of the GNU Lesser General Public
25  * License along with this library; if not, write to the Free Software
26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27  */
28 
29 #ifndef TNTDB_BITS_BLOBSTREAM_H
30 #define TNTDB_BITS_BLOBSTREAM_H
31 
32 #include <iostream>
33 
34 namespace tntdb
35 {
36  class Blob;
37 
40  class BlobStreamBuf : public std::streambuf
41  {
42  public:
43  explicit BlobStreamBuf(Blob& blob);
44 
46  int_type overflow(int_type c);
48  int_type underflow();
50  int sync();
51 
52  };
53 
56  class BlobIStream : public std::istream
57  {
58  BlobStreamBuf streambuf;
59 
60  public:
61  explicit BlobIStream(Blob& blob)
62  : std::istream(0),
63  streambuf(blob)
64  { init(&streambuf); }
65  };
66 
67 }
68 
69 #endif