1// Copyright 2014 Google LLC 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 15package datastore 16 17import ( 18 "math" 19 "time" 20) 21 22var ( 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 27func 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 34func fromUnixMicro(t int64) time.Time { 35 return time.Unix(t/1e6, (t%1e6)*1e3) 36} 37