Update liblmdb, unify 32/64 sources

external/db_drivers/liblmdb/sample-mdb.txt

@@ -0,0 +1,62 @@
+/* sample-mdb.txt - MDB toy/sample
+ *
+ * Do a line-by-line comparison of this and sample-bdb.txt
+ */
+/*
+ * Copyright 2012-2015 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];
+
+	/* Note: Most error checking omitted for simplicity */
+
+	rc = mdb_env_create(&env);
+	rc = mdb_env_open(env, "./testdb", 0, 0664);
+	rc = mdb_txn_begin(env, NULL, 0, &txn);
+	rc = mdb_dbi_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_dbi_close(env, dbi);
+	mdb_env_close(env);
+	return 0;
+}