github.com/hxx258456/ccgo@v0.0.5-0.20230213014102-48b35f46f66f/net/lif/binary.go (about)

     1  // Copyright 2016 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build solaris
     6  // +build solaris
     7  
     8  package lif
     9  
    10  // This file contains duplicates of encoding/binary package.
    11  //
    12  // This package is supposed to be used by the net package of standard
    13  // library. Therefore the package set used in the package must be the
    14  // same as net package.
    15  
    16  var (
    17  	littleEndian binaryLittleEndian
    18  	bigEndian    binaryBigEndian
    19  )
    20  
    21  type binaryByteOrder interface {
    22  	Uint16([]byte) uint16
    23  	Uint32([]byte) uint32
    24  	Uint64([]byte) uint64
    25  	PutUint16([]byte, uint16)
    26  	PutUint32([]byte, uint32)
    27  	PutUint64([]byte, uint64)
    28  }
    29  
    30  type binaryLittleEndian struct{}
    31  
    32  func (binaryLittleEndian) Uint16(b []byte) uint16 {
    33  	_ = b[1] // bounds check hint to compiler; see golang.org/issue/14808
    34  	return uint16(b[0]) | uint16(b[1])<<8
    35  }
    36  
    37  func (binaryLittleEndian) PutUint16(b []byte, v uint16) {
    38  	_ = b[1] // early bounds check to guarantee safety of writes below
    39  	b[0] = byte(v)
    40  	b[1] = byte(v >> 8)
    41  }
    42  
    43  func (binaryLittleEndian) Uint32(b []byte) uint32 {
    44  	_ = b[3] // bounds check hint to compiler; see golang.org/issue/14808
    45  	return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
    46  }
    47  
    48  func (binaryLittleEndian) PutUint32(b []byte, v uint32) {
    49  	_ = b[3] // early bounds check to guarantee safety of writes below
    50  	b[0] = byte(v)
    51  	b[1] = byte(v >> 8)
    52  	b[2] = byte(v >> 16)
    53  	b[3] = byte(v >> 24)
    54  }
    55  
    56  func (binaryLittleEndian) Uint64(b []byte) uint64 {
    57  	_ = b[7] // bounds check hint to compiler; see golang.org/issue/14808
    58  	return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 |
    59  		uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
    60  }
    61  
    62  func (binaryLittleEndian) PutUint64(b []byte, v uint64) {
    63  	_ = b[7] // early bounds check to guarantee safety of writes below
    64  	b[0] = byte(v)
    65  	b[1] = byte(v >> 8)
    66  	b[2] = byte(v >> 16)
    67  	b[3] = byte(v >> 24)
    68  	b[4] = byte(v >> 32)
    69  	b[5] = byte(v >> 40)
    70  	b[6] = byte(v >> 48)
    71  	b[7] = byte(v >> 56)
    72  }
    73  
    74  type binaryBigEndian struct{}
    75  
    76  func (binaryBigEndian) Uint16(b []byte) uint16 {
    77  	_ = b[1] // bounds check hint to compiler; see golang.org/issue/14808
    78  	return uint16(b[1]) | uint16(b[0])<<8
    79  }
    80  
    81  func (binaryBigEndian) PutUint16(b []byte, v uint16) {
    82  	_ = b[1] // early bounds check to guarantee safety of writes below
    83  	b[0] = byte(v >> 8)
    84  	b[1] = byte(v)
    85  }
    86  
    87  func (binaryBigEndian) Uint32(b []byte) uint32 {
    88  	_ = b[3] // bounds check hint to compiler; see golang.org/issue/14808
    89  	return uint32(b[3]) | uint32(b[2])<<8 | uint32(b[1])<<16 | uint32(b[0])<<24
    90  }
    91  
    92  func (binaryBigEndian) PutUint32(b []byte, v uint32) {
    93  	_ = b[3] // early bounds check to guarantee safety of writes below
    94  	b[0] = byte(v >> 24)
    95  	b[1] = byte(v >> 16)
    96  	b[2] = byte(v >> 8)
    97  	b[3] = byte(v)
    98  }
    99  
   100  func (binaryBigEndian) Uint64(b []byte) uint64 {
   101  	_ = b[7] // bounds check hint to compiler; see golang.org/issue/14808
   102  	return uint64(b[7]) | uint64(b[6])<<8 | uint64(b[5])<<16 | uint64(b[4])<<24 |
   103  		uint64(b[3])<<32 | uint64(b[2])<<40 | uint64(b[1])<<48 | uint64(b[0])<<56
   104  }
   105  
   106  func (binaryBigEndian) PutUint64(b []byte, v uint64) {
   107  	_ = b[7] // early bounds check to guarantee safety of writes below
   108  	b[0] = byte(v >> 56)
   109  	b[1] = byte(v >> 48)
   110  	b[2] = byte(v >> 40)
   111  	b[3] = byte(v >> 32)
   112  	b[4] = byte(v >> 24)
   113  	b[5] = byte(v >> 16)
   114  	b[6] = byte(v >> 8)
   115  	b[7] = byte(v)
   116  }