mirror of git://gcc.gnu.org/git/gcc.git
91 lines
2.7 KiB
Go
91 lines
2.7 KiB
Go
// 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 a 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) Uint16(b []byte) uint16 {
|
|
_ = b[1] // bounds check hint to compiler; see golang.org/issue/14808
|
|
return uint16(b[0]) | uint16(b[1])<<8
|
|
}
|
|
|
|
func (binaryLittleEndian) PutUint16(b []byte, v uint16) {
|
|
_ = b[1] // early bounds check to guarantee safety of writes below
|
|
b[0] = byte(v)
|
|
b[1] = byte(v >> 8)
|
|
}
|
|
|
|
func (binaryLittleEndian) Uint32(b []byte) uint32 {
|
|
_ = b[3] // bounds check hint to compiler; see golang.org/issue/14808
|
|
return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
|
|
}
|
|
|
|
func (binaryLittleEndian) PutUint32(b []byte, v uint32) {
|
|
_ = b[3] // early bounds check to guarantee safety of writes below
|
|
b[0] = byte(v)
|
|
b[1] = byte(v >> 8)
|
|
b[2] = byte(v >> 16)
|
|
b[3] = byte(v >> 24)
|
|
}
|
|
|
|
func (binaryLittleEndian) Uint64(b []byte) uint64 {
|
|
_ = b[7] // bounds check hint to compiler; see golang.org/issue/14808
|
|
return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 |
|
|
uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
|
|
}
|
|
|
|
type binaryBigEndian struct{}
|
|
|
|
func (binaryBigEndian) Uint16(b []byte) uint16 {
|
|
_ = b[1] // bounds check hint to compiler; see golang.org/issue/14808
|
|
return uint16(b[1]) | uint16(b[0])<<8
|
|
}
|
|
|
|
func (binaryBigEndian) PutUint16(b []byte, v uint16) {
|
|
_ = b[1] // early bounds check to guarantee safety of writes below
|
|
b[0] = byte(v >> 8)
|
|
b[1] = byte(v)
|
|
}
|
|
|
|
func (binaryBigEndian) Uint32(b []byte) uint32 {
|
|
_ = b[3] // bounds check hint to compiler; see golang.org/issue/14808
|
|
return uint32(b[3]) | uint32(b[2])<<8 | uint32(b[1])<<16 | uint32(b[0])<<24
|
|
}
|
|
|
|
func (binaryBigEndian) PutUint32(b []byte, v uint32) {
|
|
_ = b[3] // early bounds check to guarantee safety of writes below
|
|
b[0] = byte(v >> 24)
|
|
b[1] = byte(v >> 16)
|
|
b[2] = byte(v >> 8)
|
|
b[3] = byte(v)
|
|
}
|
|
|
|
func (binaryBigEndian) Uint64(b []byte) uint64 {
|
|
_ = b[7] // bounds check hint to compiler; see golang.org/issue/14808
|
|
return uint64(b[7]) | uint64(b[6])<<8 | uint64(b[5])<<16 | uint64(b[4])<<24 |
|
|
uint64(b[3])<<32 | uint64(b[2])<<40 | uint64(b[1])<<48 | uint64(b[0])<<56
|
|
}
|