sample-mdb.txt (1668B)
1 /* sample-mdb.txt - MDB toy/sample 2 * 3 * Do a line-by-line comparison of this and sample-bdb.txt 4 */ 5 /* 6 * Copyright 2012-2021 Howard Chu, Symas Corp. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted only as authorized by the OpenLDAP 11 * Public License. 12 * 13 * A copy of this license is available in the file LICENSE in the 14 * top-level directory of the distribution or, alternatively, at 15 * <http://www.OpenLDAP.org/license.html>. 16 */ 17 #include <stdio.h> 18 #include "lmdb.h" 19 20 int main(int argc,char * argv[]) 21 { 22 int rc; 23 MDB_env *env; 24 MDB_dbi dbi; 25 MDB_val key, data; 26 MDB_txn *txn; 27 MDB_cursor *cursor; 28 char sval[32]; 29 30 /* Note: Most error checking omitted for simplicity */ 31 32 rc = mdb_env_create(&env); 33 rc = mdb_env_open(env, "./testdb", 0, 0664); 34 rc = mdb_txn_begin(env, NULL, 0, &txn); 35 rc = mdb_dbi_open(txn, NULL, 0, &dbi); 36 37 key.mv_size = sizeof(int); 38 key.mv_data = sval; 39 data.mv_size = sizeof(sval); 40 data.mv_data = sval; 41 42 sprintf(sval, "%03x %d foo bar", 32, 3141592); 43 rc = mdb_put(txn, dbi, &key, &data, 0); 44 rc = mdb_txn_commit(txn); 45 if (rc) { 46 fprintf(stderr, "mdb_txn_commit: (%d) %s\n", rc, mdb_strerror(rc)); 47 goto leave; 48 } 49 rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn); 50 rc = mdb_cursor_open(txn, dbi, &cursor); 51 while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { 52 printf("key: %p %.*s, data: %p %.*s\n", 53 key.mv_data, (int) key.mv_size, (char *) key.mv_data, 54 data.mv_data, (int) data.mv_size, (char *) data.mv_data); 55 } 56 mdb_cursor_close(cursor); 57 mdb_txn_abort(txn); 58 leave: 59 mdb_dbi_close(env, dbi); 60 mdb_env_close(env); 61 return 0; 62 }