449 lines
8.9 KiB
V
449 lines
8.9 KiB
V
// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module time
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import rand
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const (
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MonthDays = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
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)
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#include <time.h>
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struct Time {
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pub:
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year int
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month int
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day int
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hour int
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minute int
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second int
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uni int // TODO it's safe to use "unix" now
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}
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fn C.localtime(int) &C.tm
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fn remove_me_when_c_bug_is_fixed() { // TODO
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}
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struct C.tm {
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tm_year int
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tm_mon int
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tm_mday int
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tm_hour int
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tm_min int
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tm_sec int
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}
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fn C.time(int) i64
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pub fn now() Time {
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t := C.time(0)
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mut now := &C.tm{!}
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now = C.localtime(&t)
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return convert_ctime(now)
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}
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pub fn random() Time {
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now_unix := now().uni
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rand_unix := rand.next(now_unix)
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return time.unix(rand_unix)
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}
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const (
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// The unsigned zero year for internal calculations.
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// Must be 1 mod 400, and times before it will not compute correctly,
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// but otherwise can be changed at will.
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absoluteZeroYear = i64(-292277022399)
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secondsPerMinute = 60
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secondsPerHour = 60 * secondsPerMinute
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secondsPerDay = 24 * secondsPerHour
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secondsPerWeek = 7 * secondsPerDay
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daysPer400Years = 365*400 + 97
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daysPer100Years = 365*100 + 24
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daysPer4Years = 365*4 + 1
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daysBefore = [
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0,
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31,
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31 + 28,
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31 + 28 + 31,
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31 + 28 + 31 + 30,
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31 + 28 + 31 + 30 + 31,
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31 + 28 + 31 + 30 + 31 + 30,
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31 + 28 + 31 + 30 + 31 + 30 + 31,
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31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
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31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
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31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
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31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
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31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31,
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]
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)
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// Based on Go's time package.
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// Copyright 2009 The Go Authors.
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pub fn unix(abs int) Time {
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// Split into time and day.
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mut d := abs / secondsPerDay
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// Account for 400 year cycles.
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mut n := d / daysPer400Years
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mut y := 400 * n
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d -= daysPer400Years * n
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// Cut off 100-year cycles.
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// The last cycle has one extra leap year, so on the last day
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// of that year, day / daysPer100Years will be 4 instead of 3.
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// Cut it back down to 3 by subtracting n>>2.
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n = d / daysPer100Years
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n -= n >> 2
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y += 100 * n
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d -= daysPer100Years * n
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// Cut off 4-year cycles.
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// The last cycle has a missing leap year, which does not
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// affect the computation.
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n = d / daysPer4Years
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y += 4 * n
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d -= daysPer4Years * n
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// Cut off years within a 4-year cycle.
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// The last year is a leap year, so on the last day of that year,
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// day / 365 will be 4 instead of 3. Cut it back down to 3
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// by subtracting n>>2.
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n = d / 365
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n -= n >> 2
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y += n
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d -= 365 * n
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yday := int(d)
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mut day := yday
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year := abs / int(3.154e+7) + 1970 //int(i64(y) + absoluteZeroYear)
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hour := int(abs%secondsPerDay) / secondsPerHour
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minute := int(abs % secondsPerHour) / secondsPerMinute
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second := int(abs % secondsPerMinute)
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if is_leap_year(year) {
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// Leap year
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if day > 31+29-1 {
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// After leap day; pretend it wasn't there.
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day--
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} else if day == 31+29-1 {
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// Leap day.
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day = 29
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return Time{year:year, month:2, day:day, hour:hour, minute: minute, second: second}
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}
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}
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// Estimate month on assumption that every month has 31 days.
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// The estimate may be too low by at most one month, so adjust.
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mut month := day / 31
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mut begin := 0
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end := int(daysBefore[month+1])
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if day >= end {
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month++
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begin = end
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} else {
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begin = int(daysBefore[month])
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}
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month++ // because January is 1
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day = day - begin + 1
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return Time{year:year, month: month, day:day, hour:hour, minute: minute, second: second}
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}
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pub fn convert_ctime(t tm) Time {
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return Time {
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year: t.tm_year + 1900
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month: t.tm_mon + 1
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day: t.tm_mday
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hour: t.tm_hour
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minute: t.tm_min
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second: t.tm_sec
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uni: C.mktime(&t)
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}
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}
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pub fn (t Time) format_ss() string {
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return '${t.year}-${t.month:02d}-${t.day:02d} ${t.hour:02d}:${t.minute:02d}:${t.second:02d}'
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}
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pub fn (t Time) format() string {
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return '${t.year}-${t.month:02d}-${t.day:02d} ${t.hour:02d}:${t.minute:02d}'
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}
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const (
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Months = 'JanFebMarAprMayJunJulAugSepOctNovDec'
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Days = 'MonTueWedThuFriSatSun'
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)
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pub fn (t Time) smonth() string {
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i := t.month - 1
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return Months.substr(i * 3, (i + 1) * 3)
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}
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// 21:04
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pub fn (t Time) hhmm() string {
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return '${t.hour:02d}:${t.minute:02d}'
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}
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/*
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fn (t Time) hhmm_tmp() string {
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return '${t.hour:02d}:${t.minute:02d}'
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}
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*/
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// 9:04pm
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pub fn (t Time) hhmm12() string {
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mut am := 'am'
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mut hour := t.hour
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if t.hour > 11 {
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am = 'pm'
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}
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if t.hour > 12 {
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hour = hour - 12
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}
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if t.hour == 0 {
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hour = 12
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}
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return '$hour:${t.minute:02d} $am'
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}
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// 21:04:03
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pub fn (t Time) hhmmss() string {
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return '${t.hour:02d}:${t.minute:02d}:${t.second:02d}'
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}
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// 2012-01-05
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pub fn (t Time) ymmdd() string {
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return '${t.year}-${t.month:02d}-${t.day:02d}'
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}
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// Jul 3
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pub fn (t Time) md() string {
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// jl := t.smonth()
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s := '${t.smonth()} $t.day'
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return s
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}
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pub fn (t Time) clean() string {
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nowe := time.now()
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// if amtime {
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// hm = t.Format("3:04 pm")
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// }
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// Today
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if t.month == nowe.month && t.year == nowe.year && t.day == nowe.day {
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return t.hhmm()
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}
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// This week
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// if time.Since(t) < 24*7*time.Hour {
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// return t.Weekday().String()[:3] + " " + hm
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// }
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// This year
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if t.year == nowe.year {
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return '${t.smonth()} ${t.day} ${t.hhmm()}'
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}
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return t.format()
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// return fmt.Sprintf("%4d/%02d/%02d", t.Year(), t.Month(), t.Day()) + " " + hm
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}
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pub fn (t Time) clean12() string {
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nowe := time.now()
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// if amtime {
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// hm = t.Format("3:04 pm")
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// }
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// Today
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if t.month == nowe.month && t.year == nowe.year && t.day == nowe.day {
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return t.hhmm12()
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}
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// This week
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// if time.Since(t) < 24*7*time.Hour {
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// return t.Weekday().String()[:3] + " " + hm
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// }
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// This year
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if t.year == nowe.year {
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return '${t.smonth()} ${t.day} ${t.hhmm12()}'
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}
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return t.format()
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// return fmt.Sprintf("%4d/%02d/%02d", t.Year(), t.Month(), t.Day()) + " " + hm
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}
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// `parse` parses time in the following format: "2018-01-27 12:48:34"
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pub fn parse(s string) Time {
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// println('parse="$s"')
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pos := s.index(' ')
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if pos <= 0 {
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println('bad time format')
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return now()
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}
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symd := s.left(pos)
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ymd := symd.split('-')
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if ymd.len != 3 {
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println('bad time format')
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return now()
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}
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shms := s.right(pos)
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hms := shms.split(':')
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hour := hms[0]
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minute := hms[1]
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second := hms[2]
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// //////////
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return new_time(Time {
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year: ymd[0].int()
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month: ymd[1].int()
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day: ymd[2].int()
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hour: hour.int()
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minute: minute.int()
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second: second.int()
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})
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}
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pub fn new_time(t Time) Time {
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return{t | uni: t.calc_unix()}
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}
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pub fn (t &Time) calc_unix() int {
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if t.uni != 0 {
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return t.uni
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}
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tt := C.tm{
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tm_sec : t.second
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tm_min : t.minute
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tm_hour : t.hour
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tm_mday : t.day
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tm_mon : t.month-1
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tm_year : t.year - 1900
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}
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return C.mktime(&tt)
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}
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// TODO add(d time.Duration)
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pub fn (t Time) add_seconds(seconds int) Time {
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return unix(t.uni + seconds)
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}
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// TODO use time.Duration instead of seconds
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fn since(t Time) int {
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return 0
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}
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pub fn (t Time) relative() string {
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now := time.now()
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secs := now.uni - t.uni
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if secs <= 30 {
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// right now or in the future
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// TODO handle time in the future
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return 'now'
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}
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if secs < 60 {
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return '1m'
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}
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if secs < 3600 {
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return '${secs/60}m'
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}
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if secs < 3600 * 24 {
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return '${secs/3600}h'
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}
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if secs < 3600 * 24 * 5 {
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return '${secs/3600/24}d'
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}
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if secs > 3600 * 24 * 10000 {
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return ''
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}
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return t.md()
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}
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pub fn day_of_week(y, m, d int) int {
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// Sakomotho's algorithm is explained here:
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// https://stackoverflow.com/a/6385934
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t := [0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4]
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mut sy := y
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if (m < 3) {
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sy = sy - 1
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}
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return ( sy + sy/4 - sy/100 + sy/400 + t[m-1] + d - 1) % 7 + 1
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}
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pub fn (t Time) day_of_week() int {
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return day_of_week(t.year, t.month, t.day)
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}
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// weekday_str() returns the current day in string (upto 3 characters)
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pub fn (t Time) weekday_str() string {
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i := t.day_of_week() - 1
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return Days.substr(i * 3, (i + 1) * 3)
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}
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struct C.timeval {
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tv_sec int
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tv_usec int
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}
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// in ms
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pub fn ticks() i64 {
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$if windows {
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return C.GetTickCount()
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}
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$else {
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ts := C.timeval{}
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C.gettimeofday(&ts,0)
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return ts.tv_sec * 1000 + (ts.tv_usec / 1000)
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}
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/*
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t := i64(C.mach_absolute_time())
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# Nanoseconds elapsedNano = AbsoluteToNanoseconds( *(AbsoluteTime *) &t );
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# return (double)(* (uint64_t *) &elapsedNano) / 1000000;
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*/
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}
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pub fn sleep(seconds int) {
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$if windows {
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C._sleep(seconds * 1000)
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}
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$else {
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C.sleep(seconds)
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}
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}
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pub fn usleep(n int) {
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$if windows {
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//C._usleep(n)
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}
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$else {
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C.usleep(n)
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}
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}
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pub fn sleep_ms(n int) {
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$if windows {
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C.Sleep(n)
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}
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$else {
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C.usleep(n * 1000)
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}
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}
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// Determine whether a year is a leap year.
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pub fn is_leap_year(year int) bool {
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return (year%4 == 0) && (year%100 != 0 || year%400 == 0)
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}
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// Returns number of days in month
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pub fn days_in_month(month, year int) ?int {
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if month > 12 || month < 1 {
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return error('Invalid month: $month')
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}
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extra := if month == 2 && is_leap_year(year) {1} else {0}
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res := MonthDays[month-1] + extra
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return res
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}
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