root/gsdl/trunk/lib/gdbmclass.h @ 15679

Revision 15679, 2.3 KB (checked in by mdewsnip, 11 years ago)

(Adding new DB support) Adding a new "getfileextension()" function that is implemented differently between gdbmclass (which is endian-specific) and sqlitedbclass (which isn't).

Line 
1/**********************************************************************
2 *
3 * gdbmclass.h --
4 * Copyright (C) 1999-2008  The New Zealand Digital Library Project
5 *
6 * A component of the Greenstone digital library software
7 * from the New Zealand Digital Library Project at the
8 * University of Waikato, New Zealand.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 *
24 *********************************************************************/
25
26#ifndef GDBMCLASS_H
27#define GDBMCLASS_H
28
29
30#include "gsdlconf.h"
31#include "dbclass.h"
32
33#ifdef __WIN32__
34
35#ifdef __cplusplus
36  extern "C" {
37#endif
38#include "autoconf.h"
39#include "systems.h"
40#include "gdbmconst.h"
41#include "gdbm.h"
42#ifdef __cplusplus
43  }
44#endif
45
46#else
47#include <gdbm.h>
48#endif
49
50
51class gdbmclass : public dbclass
52{
53public:
54  gdbmclass() { gdbmfile = NULL; };
55  ~gdbmclass();
56
57  // returns true if opened
58  bool opendatabase (const text_t &filename, int mode, int num_retrys, bool need_filelock);
59
60  void closedatabase ();
61
62  void deletekey (const text_t &key);
63
64  // returns file extension string
65  text_t getfileextension ();
66
67  // returns true on success
68  bool getkeydata (const text_t& key, text_t &data);
69
70  // returns array of keys
71  text_tarray getkeys ();
72
73  // returns true on success
74  bool setkeydata (const text_t &key, const text_t &data);
75
76protected:
77  text_t openfile;
78  GDBM_FILE gdbmfile;
79
80  // getfirstkey and getnextkey are used for traversing the database
81  // no insertions or deletions should be carried out while traversing
82  // the database. when there are no keys left to visit in the database
83  // an empty string is returned.
84  text_t getfirstkey ();
85  text_t getnextkey (const text_t &key);
86};
87
88
89#endif
Note: See TracBrowser for help on using the browser.