source: gs2-extensions/tdb-edit/trunk/src/src/tdbkeys-src/tdbkeys.cpp@ 24047

Last change on this file since 24047 was 24047, checked in by jmt12, 13 years ago

I'd misunderstood where I needed to free the memory allocated to storing char*s in the TDB_DATA. Apparently I only have to free them when they are returned by tdb_fetch() or similar. Removed segfault causing calls to free()

  • Property svn:executable set to *
File size: 2.7 KB
Line 
1/**********************************************************************
2 *
3 * tdbkeys -- retrieve a single value from the TDB database
4 *
5 * A component of the Greenstone digital library software
6 * from the New Zealand Digital Library Project at the
7 * University of Waikato, New Zealand.
8 *
9 * Copyright (C) 2011 The New Zealand Digital Library Project
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 *
25 *********************************************************************/
26
27#if defined(GSDL_USE_OBJECTSPACE)
28#include <ospace\std\iostream>
29#elif defined(GSDL_USE_IOS_H)
30#include <iostream.h>
31#else
32#include <iostream>
33#endif
34
35#include <fcntl.h>
36#include "tdb.h"
37
38// use the standard namespace
39#if !defined (GSDL_NAMESPACE_BROKEN)
40#if defined(GSDL_USE_OBJECTSPACE)
41using namespace ospace::std;
42#else
43using namespace std;
44#endif
45#endif
46
47/**
48 */
49void
50printUsage(char *program_name)
51{
52 cerr << "usage: " << program_name << " <database_path>" << endl << endl;
53}
54/** printUsage() **/
55
56/** Open a connection to the TDB database then return a listing of all of the
57 * keys, one per line, to STDOUT.
58 * @param argc - must be 2
59 * @param argv - and char * array containing first the executable name, then
60 * the name of/path to the database
61 * @return 0
62 */
63int
64main (int argc, char *argv[])
65{
66 // sanity check
67 if (argc != 2)
68 {
69 printUsage(argv[0]);
70 exit (0);
71 }
72
73 char *dbname = argv[1];
74
75 // open the database
76 int hash_size = 0;
77 int tdb_flags = TDB_DEFAULT;
78 int open_flags = O_RDONLY;
79 TDB_CONTEXT *tdb = tdb_open(dbname, hash_size, tdb_flags, open_flags, 0664);
80 if (!tdb)
81 {
82 cerr << "couldn't create " << dbname << endl;
83 exit (0);
84 }
85
86 TDB_DATA key = tdb_firstkey(tdb);
87 while (key.dptr != NULL)
88 {
89 for (int i = 0; i < key.dsize; ++i)
90 {
91 cout << key.dptr[i];
92 }
93 cout << endl;
94
95 /* get next key */
96 TDB_DATA nextkey = tdb_nextkey(tdb, key);
97
98 /* free old key's dptr, otherwise causes memory leak */
99 free(key.dptr);
100
101 /* can now safely copy content of nextkey into key */
102 key = nextkey;
103 }
104
105 tdb_close(tdb);
106
107 return 0;
108}
109/** main() **/
110
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