/********************************************************************** * * gdbmkeys -- retrieve a single value from the GDBM database * Copyright (C) 1999 The New Zealand Digital Library Project * * A component of the Greenstone digital library software * from the New Zealand Digital Library Project at the * University of Waikato, New Zealand. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * *********************************************************************/ #ifdef __WIN32__ #include "autoconf.h" #include "systems.h" #include "gdbmconst.h" #include "gdbm.h" #else #include #endif #include "gsdlconf.h" #include #if defined(GSDL_USE_OBJECTSPACE) #include #elif defined(GSDL_USE_IOS_H) #include #else #include #endif // use the standard namespace #if !defined (GSDL_NAMESPACE_BROKEN) #if defined(GSDL_USE_OBJECTSPACE) using namespace ospace::std; #else using namespace std; #endif #endif void print_usage (char *program_name) { cerr << "usage: " << program_name << " " << endl; cerr << endl; } int main (int argc, char *argv[]) { int block_size = 0, i; GDBM_FILE dbf; datum key, nextkey; // sanity check if (argc != 2) { print_usage (argv[0]); exit (0); } // open the database #ifdef __WIN32__ dbf = gdbm_open (argv[1], block_size, GDBM_READER, 00664, NULL, 0); #else dbf = gdbm_open (argv[1], block_size, GDBM_READER, 00664, NULL); #endif if (dbf == NULL) { cerr << "Couldn't open " << argv[1] << endl; exit (0); } key = gdbm_firstkey (dbf); while (key.dptr != NULL) { for (i = 0; i < key.dsize; ++i) { cout << key.dptr[i]; } cout << endl; /* get next key */ nextkey = gdbm_nextkey (dbf, key); /* free old key's dptr, otherwise causes memory leak */ free(key.dptr); /* can now safely copy content of nextkey into key */ key = nextkey; } gdbm_close (dbf); return 0; }