Add sample apps for comparison/education purposes

diff --git a/libraries/liblmdb/sample-bdb.c b/libraries/liblmdb/sample-bdb.c
new file mode 100644 (file)
index 0000000..2c11bb3
--- /dev/null
+++ b/libraries/liblmdb/sample-bdb.c
@@ -0,0 +1,71 @@
+/* sample-bdb.c - BerkeleyDB toy/sample
+ *
+ * Do a line-by-line comparison of this and sample-mdb.c
+ */
+/*
+ * Copyright 2012 Howard Chu, Symas Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+#include <stdio.h>
+#include <string.h>
+#include <db.h>
+
+int main(int argc,char * argv[])
+{
+       int rc;
+       DB_ENV *env;
+       DB *dbi;
+       DBT key, data;
+       DB_TXN *txn;
+       DBC *cursor;
+       char sval[32], kval[32];
+
+#define FLAGS (DB_INIT_LOCK|DB_INIT_LOG|DB_INIT_TXN|DB_INIT_MPOOL|DB_CREATE|DB_THREAD)
+       rc = db_env_create(&env, 0);
+       rc = env->open(env, "./testdb", FLAGS, 0664);
+       rc = db_create(&dbi, env, 0);
+       rc = env->txn_begin(env, NULL, &txn, 0);
+       rc = dbi->open(dbi, txn, "test.bdb", NULL, DB_BTREE, DB_CREATE, 0664);
+
+       memset(&key, 0, sizeof(DBT));
+       memset(&data, 0, sizeof(DBT));
+       key.size = sizeof(int);
+       key.data = sval;
+       data.size = sizeof(sval);
+       data.data = sval;
+
+       sprintf(sval, "%03x %d foo bar", 32, 3141592);
+       rc = dbi->put(dbi, txn, &key, &data, 0);
+       rc = txn->commit(txn, 0);
+       if (rc) {
+               fprintf(stderr, "txn->commit: (%d) %s\n", rc, db_strerror(rc));
+               goto leave;
+       }
+       rc = env->txn_begin(env, NULL, &txn, 0);
+       rc = dbi->cursor(dbi, txn, &cursor, 0);
+       key.flags = DB_DBT_USERMEM;
+       key.data = kval;
+       key.ulen = sizeof(kval);
+       data.flags = DB_DBT_USERMEM;
+       data.data = sval;
+       data.ulen = sizeof(sval);
+       while ((rc = cursor->c_get(cursor, &key, &data, DB_NEXT)) == 0) {
+               printf("key: %p %.*s, data: %p %.*s\n",
+                       key.data,  (int) key.size,  (char *) key.data,
+                       data.data, (int) data.size, (char *) data.data);
+       }
+       rc = cursor->c_close(cursor);
+       rc = txn->abort(txn);
+leave:
+       rc = dbi->close(dbi, 0);
+       rc = env->close(env, 0);
+       return rc;
+}

diff --git a/libraries/liblmdb/sample-mdb.c b/libraries/liblmdb/sample-mdb.c
new file mode 100644 (file)
index 0000000..0b10f47
--- /dev/null
+++ b/libraries/liblmdb/sample-mdb.c
@@ -0,0 +1,60 @@
+/* sample-mdb.c - MDB toy/sample
+ *
+ * Do a line-by-line comparison of this and sample-bdb.c
+ */
+/*
+ * Copyright 2012 Howard Chu, Symas Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+#include <stdio.h>
+#include "lmdb.h"
+
+int main(int argc,char * argv[])
+{
+       int rc;
+       MDB_env *env;
+       MDB_dbi dbi;
+       MDB_val key, data;
+       MDB_txn *txn;
+       MDB_cursor *cursor;
+       char sval[32];
+
+       rc = mdb_env_create(&env);
+       rc = mdb_env_open(env, "./testdb", 0, 0664);
+       rc = mdb_txn_begin(env, NULL, 0, &txn);
+       rc = mdb_open(txn, NULL, 0, &dbi);
+
+       key.mv_size = sizeof(int);
+       key.mv_data = sval;
+       data.mv_size = sizeof(sval);
+       data.mv_data = sval;
+
+       sprintf(sval, "%03x %d foo bar", 32, 3141592);
+       rc = mdb_put(txn, dbi, &key, &data, 0);
+       rc = mdb_txn_commit(txn);
+       if (rc) {
+               fprintf(stderr, "mdb_txn_commit: (%d) %s\n", rc, mdb_strerror(rc));
+               goto leave;
+       }
+       rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn);
+       rc = mdb_cursor_open(txn, dbi, &cursor);
+       while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
+               printf("key: %p %.*s, data: %p %.*s\n",
+                       key.mv_data,  (int) key.mv_size,  (char *) key.mv_data,
+                       data.mv_data, (int) data.mv_size, (char *) data.mv_data);
+       }
+       mdb_cursor_close(cursor);
+       mdb_txn_abort(txn);
+leave:
+       mdb_close(env, dbi);
+       mdb_env_close(env);
+       return 0;
+}