You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
84 lines
1.7 KiB
84 lines
1.7 KiB
// ------------------------------------------------------------------------
|
|
// Project atila
|
|
// Active Thing (activething.com) git.activething.com/go
|
|
//
|
|
// File name gogo.go
|
|
// Created by DEV
|
|
// Modified 21/02/2024
|
|
//
|
|
// Copyright 2024 activething.com
|
|
// ------------------------------------------------------------------------
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
// ------------------------------------------------------------------------
|
|
|
|
package dates
|
|
|
|
import "errs"
|
|
|
|
const(
|
|
|
|
secondsDay = 24 * 60 * 60
|
|
|
|
)
|
|
|
|
|
|
var (
|
|
|
|
G = struct {
|
|
|
|
ErrInvalidDateRange ErrDates
|
|
}{
|
|
|
|
ErrInvalidDateRange : ErrDates{errs.ErrCode ("invalid-date-range")},
|
|
}
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
func IsYearLeap (year int) bool {
|
|
return year%4 == 0 && (year%100 != 0 || year%400 == 0) }
|
|
|
|
|
|
func DaysInYear (year int) int {
|
|
if IsYearLeap(year) {
|
|
return 366 }
|
|
return 365
|
|
}
|
|
|
|
|
|
func DaysIn (year, month int) int {
|
|
if month <= 0 || month > 12 {
|
|
return 0 }
|
|
d := [12]int{ 31,28,31,30,31,30,31,30,31,30,31 }
|
|
if month == 2 && IsYearLeap(year) {
|
|
return 29 }
|
|
return d[month]
|
|
}
|
|
|
|
|
|
func DayOfWeek (year, month, day int) int {
|
|
if month < 3 {
|
|
month += 12
|
|
year--
|
|
}
|
|
J := year / 100
|
|
K := year % 100
|
|
h := (day + (13*(month+1))/5 + K + K/4 + J/4 + 5*J) % 7
|
|
if h <= 1 {
|
|
return h+6
|
|
}
|
|
return h-1
|
|
}
|