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