/*
 * Copyright 2018 The CovenantSQL Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package utils

// ConcatAll concatenate several bytes slice into one.
func ConcatAll(args ...[]byte) []byte {
	var bLen int
	for i := range args {
		bLen += len(args[i])
	}

	key := make([]byte, bLen)
	position := 0
	for i := range args {
		copy(key[position:], args[i])
		position += len(args[i])
	}
	return key
}