go.mercari.io/datastore@v1.8.2/time.go (about)

     1  // Copyright 2014 Google Inc. All Rights Reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package datastore
    16  
    17  import (
    18  	"math"
    19  	"time"
    20  )
    21  
    22  var (
    23  	minTime = time.Unix(int64(math.MinInt64)/1e6, (int64(math.MinInt64)%1e6)*1e3)
    24  	maxTime = time.Unix(int64(math.MaxInt64)/1e6, (int64(math.MaxInt64)%1e6)*1e3)
    25  )
    26  
    27  func toUnixMicro(t time.Time) int64 {
    28  	// We cannot use t.UnixNano() / 1e3 because we want to handle times more than
    29  	// 2^63 nanoseconds (which is about 292 years) away from 1970, and those cannot
    30  	// be represented in the numerator of a single int64 divide.
    31  	return t.Unix()*1e6 + int64(t.Nanosecond()/1e3)
    32  }
    33  
    34  func fromUnixMicro(t int64) time.Time {
    35  	return time.Unix(t/1e6, (t%1e6)*1e3)
    36  }