github.com/yinchengtsinghua/golang-Eos-dpos-Ethereum@v0.0.0-20190121132951-92cc4225ed8e/swarm/storage/mru/timestampprovider.go (about)

     1  
     2  //此源码被清华学神尹成大魔王专业翻译分析并修改
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     9  //
    10  //
    11  //
    12  //
    13  //
    14  //
    15  //
    16  //
    17  //
    18  //
    19  //
    20  //
    21  //
    22  //
    23  //
    24  
    25  package mru
    26  
    27  import (
    28  	"encoding/binary"
    29  	"time"
    30  )
    31  
    32  //
    33  var TimestampProvider timestampProvider = NewDefaultTimestampProvider()
    34  
    35  //
    36  type Timestamp struct {
    37  Time uint64 //
    38  }
    39  
    40  //
    41  const timestampLength = 8
    42  
    43  //
    44  type timestampProvider interface {
    45  Now() Timestamp //
    46  }
    47  
    48  //
    49  func (t *Timestamp) binaryGet(data []byte) error {
    50  	if len(data) != timestampLength {
    51  		return NewError(ErrCorruptData, "timestamp data has the wrong size")
    52  	}
    53  	t.Time = binary.LittleEndian.Uint64(data[:8])
    54  	return nil
    55  }
    56  
    57  //
    58  func (t *Timestamp) binaryPut(data []byte) error {
    59  	if len(data) != timestampLength {
    60  		return NewError(ErrCorruptData, "timestamp data has the wrong size")
    61  	}
    62  	binary.LittleEndian.PutUint64(data, t.Time)
    63  	return nil
    64  }
    65  
    66  type DefaultTimestampProvider struct {
    67  }
    68  
    69  //
    70  func NewDefaultTimestampProvider() *DefaultTimestampProvider {
    71  	return &DefaultTimestampProvider{}
    72  }
    73  
    74  //
    75  func (dtp *DefaultTimestampProvider) Now() Timestamp {
    76  	return Timestamp{
    77  		Time: uint64(time.Now().Unix()),
    78  	}
    79  }