forked from flannel-io/flannel
/
endianess.go
42 lines (36 loc) · 1.13 KB
/
endianess.go
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// Copyright 2015 flannel 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 ip
// Taken from a patch by David Anderson who submitted it
// but got rejected by the golang team
import (
"encoding/binary"
"unsafe"
)
// NativeEndian is the ByteOrder of the current system.
var NativeEndian binary.ByteOrder
func init() {
// Examine the memory layout of an int16 to determine system
// endianness.
var one int16 = 1
b := (*byte)(unsafe.Pointer(&one))
if *b == 0 {
NativeEndian = binary.BigEndian
} else {
NativeEndian = binary.LittleEndian
}
}
func NativelyLittle() bool {
return NativeEndian == binary.LittleEndian
}