go - Golang 时间（以分秒为单位）

Question

我在将 time.Time 转换为 Deciseconds 时遇到问题。我基本上必须将以下内容移植到 Golang

Deciseconds fits into 36 bits with enough precision to record a user's consent action timing. Javascript: Math.round((new Date()).getTime()/100)

我试过使用 Go / golang time.Now().UnixNano() 转换为毫秒？

转换为毫秒，然后除以 100。这会产生错误的时间戳。我敢打赌这是我的一个愚蠢的错误，但我只是想得到一些反馈

这是读取我尝试提交的时间戳的方法

// ReadTime reads the next 36 bits representing the epoch time in deciseconds
// and converts it to a time.Time.
func (r *ConsentReader) ReadTime() time.Time {
    var ds = int64(r.ReadBits(36))
    return time.Unix(ds/dsPerS, (ds%dsPerS)*nsPerDs).UTC()
}

https://github.com/LiveRamp/iabconsent/blob/328e761006ce2652bc8c0daee614381d7565c05e/parse.go#L34

我正在设置日期

func (b bit) setDateToDeciseconds(startInclusive int, size int, t time.Time) {
    deciseconds := int32(t.Unix() / 1000)
    b.setNumberInt32(startInclusive, size, deciseconds)
}


func (b bit) setNumberInt32(startInclusive int, size int, to int32) {
    for i := size - 1; i >= 0; i-- {
        index := startInclusive + i
        byteIndex := index / 8
        shift := uint((byteIndex+1)*8 - index - 1)
        b[byteIndex] |= byte((to % 2) << shift)
        to /= 2
    }
}

我不断得到看起来像的日期时间

time.Now() ->1970-01-02 18:26:11.4 +0000 UTC

标签： gotime

Answer 1

Use these functions to convert a time.Time to and from deciseconds since the epoch.

func toDeci(t time.Time) int64 {
    return t.UnixNano() / 1e8
}

func fromDeci(t int64) time.Time {
    return time.Unix(0, t*1e8)
}

playground example

You can replace 1e8 with int64(time.Second/10) for a possible improvement in readability.