From 9e1d9bff3b18cfa09ba96cd027fa653daae10816 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?P=C3=A9ter=20Szil=C3=A1gyi?= Date: Thu, 5 Nov 2015 23:57:57 +0200 Subject: node: customizable protocol and service stacks --- node/utils.go | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 node/utils.go (limited to 'node/utils.go') diff --git a/node/utils.go b/node/utils.go new file mode 100644 index 000000000..deaa6c5fb --- /dev/null +++ b/node/utils.go @@ -0,0 +1,33 @@ +// Copyright 2015 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum library is free software: you can redistribute it and/or modify +// it under the terms of the GNU Lesser General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// The go-ethereum library 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 Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public License +// along with the go-ethereum library. If not, see . + +package node + +import ( + "path/filepath" + + "github.com/ethereum/go-ethereum/ethdb" +) + +// openDatabase opens an existing database with the given name from within the +// specified data directory, creating one if none exists. If the data directory +// is empty, an ephemeral memory database is returned. +func openDatabase(dataDir string, name string, cache int) (ethdb.Database, error) { + if dataDir == "" { + return ethdb.NewMemDatabase() + } + return ethdb.NewLDBDatabase(filepath.Join(dataDir, name), cache) +} -- cgit v1.2.3