blob: 06c06cd4a5fa51be348be294c18364bf9d30c4da [file] [log] [blame]
khenaidoo59ce9dd2019-11-11 13:05:32 -05001// Copyright 2017 The etcd Authors
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15package cpuutil
16
17import (
18 "encoding/binary"
19 "unsafe"
20)
21
22const intWidth int = int(unsafe.Sizeof(0))
23
24var byteOrder binary.ByteOrder
25
26// ByteOrder returns the byte order for the CPU's native endianness.
27func ByteOrder() binary.ByteOrder { return byteOrder }
28
29func init() {
30 i := int(0x1)
31 if v := (*[intWidth]byte)(unsafe.Pointer(&i)); v[0] == 0 {
32 byteOrder = binary.BigEndian
33 } else {
34 byteOrder = binary.LittleEndian
35 }
36}