// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// +build darwin dragonfly freebsd netbsd openbsd

package route

// This file contains duplicates of encoding/binary package.
//
// This package is supposed to be used by the net package of standard
// library. Therefore the package set used in the package must be the
// same as net package.

var (
	littleEndian binaryLittleEndian
	bigEndian    binaryBigEndian
)

type binaryByteOrder interface {
	Uint16([]byte) uint16
	Uint32([]byte) uint32
	PutUint16([]byte, uint16)
	PutUint32([]byte, uint32)
	Uint64([]byte) uint64
}

type binaryLittleEndian struct{}

func (binaryLittleEndian) ( []byte) uint16 {
	_ = [1] // bounds check hint to compiler; see golang.org/issue/14808
	return uint16([0]) | uint16([1])<<8
}

func (binaryLittleEndian) ( []byte,  uint16) {
	_ = [1] // early bounds check to guarantee safety of writes below
	[0] = byte()
	[1] = byte( >> 8)
}

func (binaryLittleEndian) ( []byte) uint32 {
	_ = [3] // bounds check hint to compiler; see golang.org/issue/14808
	return uint32([0]) | uint32([1])<<8 | uint32([2])<<16 | uint32([3])<<24
}

func (binaryLittleEndian) ( []byte,  uint32) {
	_ = [3] // early bounds check to guarantee safety of writes below
	[0] = byte()
	[1] = byte( >> 8)
	[2] = byte( >> 16)
	[3] = byte( >> 24)
}

func (binaryLittleEndian) ( []byte) uint64 {
	_ = [7] // bounds check hint to compiler; see golang.org/issue/14808
	return uint64([0]) | uint64([1])<<8 | uint64([2])<<16 | uint64([3])<<24 |
		uint64([4])<<32 | uint64([5])<<40 | uint64([6])<<48 | uint64([7])<<56
}

type binaryBigEndian struct{}

func (binaryBigEndian) ( []byte) uint16 {
	_ = [1] // bounds check hint to compiler; see golang.org/issue/14808
	return uint16([1]) | uint16([0])<<8
}

func (binaryBigEndian) ( []byte,  uint16) {
	_ = [1] // early bounds check to guarantee safety of writes below
	[0] = byte( >> 8)
	[1] = byte()
}

func (binaryBigEndian) ( []byte) uint32 {
	_ = [3] // bounds check hint to compiler; see golang.org/issue/14808
	return uint32([3]) | uint32([2])<<8 | uint32([1])<<16 | uint32([0])<<24
}

func (binaryBigEndian) ( []byte,  uint32) {
	_ = [3] // early bounds check to guarantee safety of writes below
	[0] = byte( >> 24)
	[1] = byte( >> 16)
	[2] = byte( >> 8)
	[3] = byte()
}

func (binaryBigEndian) ( []byte) uint64 {
	_ = [7] // bounds check hint to compiler; see golang.org/issue/14808
	return uint64([7]) | uint64([6])<<8 | uint64([5])<<16 | uint64([4])<<24 |
		uint64([3])<<32 | uint64([2])<<40 | uint64([1])<<48 | uint64([0])<<56
}