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telekasten.nvim/lua/taglinks/date.lua

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---------------------------------------------------------------------------------------
-- Module for date and time calculations
--
-- Version 2.2
-- Copyright (C) 2005-2006, by Jas Latrix (jastejada@yahoo.com)
-- Copyright (C) 2013-2021, by Thijs Schreijer
-- Licensed under MIT, http://opensource.org/licenses/MIT
-- The MIT License (MIT) http://opensource.org/licenses/MIT
--
-- Copyright (c) 2013-2021 Thijs Schreijer
--
-- Permission is hereby granted, free of charge, to any person obtaining a copy
-- of this software and associated documentation files (the "Software"), to deal
-- in the Software without restriction, including without limitation the rights
-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-- copies of the Software, and to permit persons to whom the Software is
-- furnished to do so, subject to the following conditions:
--
-- The above copyright notice and this permission notice shall be included in
-- all copies or substantial portions of the Software.
--
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-- THE SOFTWARE.
--[[ CONSTANTS ]]
--
local HOURPERDAY = 24
local MINPERHOUR = 60
local MINPERDAY = 1440 -- 24*60
local SECPERMIN = 60
local SECPERHOUR = 3600 -- 60*60
local SECPERDAY = 86400 -- 24*60*60
local TICKSPERSEC = 1000000
local TICKSPERDAY = 86400000000
local TICKSPERHOUR = 3600000000
local TICKSPERMIN = 60000000
local DAYNUM_MAX = 365242500 -- Sat Jan 01 1000000 00:00:00
local DAYNUM_MIN = -365242500 -- Mon Jan 01 1000000 BCE 00:00:00
local DAYNUM_DEF = 0 -- Mon Jan 01 0001 00:00:00
local _
--[[ GLOBAL SETTINGS ]]
--
local centuryflip = 0 -- year >= centuryflip == 1900, < centuryflip == 2000
--[[ LOCAL ARE FASTER ]]
--
local type = type
local pairs = pairs
local error = error
local assert = assert
local tonumber = tonumber
local tostring = tostring
local string = string
local math = math
local os = os
local unpack = unpack or table.unpack
local setmetatable = setmetatable
local getmetatable = getmetatable
--[[ EXTRA FUNCTIONS ]]
--
local fmt = string.format
local lwr = string.lower
local rep = string.rep
local len = string.len -- luacheck: ignore
local sub = string.sub
local gsub = string.gsub
local gmatch = string.gmatch
local find = string.find
local ostime = os.time
local osdate = os.date
local floor = math.floor
local ceil = math.ceil
local abs = math.abs
-- removes the decimal part of a number
local function fix(n)
n = tonumber(n)
return n and ((n > 0 and floor or ceil)(n))
end
-- returns the modulo n % d;
local function mod(n, d)
return n - d * floor(n / d)
end
-- is `str` in string list `tbl`, `ml` is the minimun len
local function inlist(str, tbl, ml, tn)
local sl = len(str)
if sl < (ml or 0) then
return nil
end
str = lwr(str)
for k, v in pairs(tbl) do
if str == lwr(sub(v, 1, sl)) then
if tn then
tn[0] = k
end
return k
end
end
end
local function fnil() end
--[[ DATE FUNCTIONS ]]
--
local DATE_EPOCH -- to be set later
local sl_weekdays = {
[0] = "Sunday",
[1] = "Monday",
[2] = "Tuesday",
[3] = "Wednesday",
[4] = "Thursday",
[5] = "Friday",
[6] = "Saturday",
[7] = "Sun",
[8] = "Mon",
[9] = "Tue",
[10] = "Wed",
[11] = "Thu",
[12] = "Fri",
[13] = "Sat",
}
local sl_meridian = { [-1] = "AM", [1] = "PM" }
local sl_months = {
[00] = "January",
[01] = "February",
[02] = "March",
[03] = "April",
[04] = "May",
[05] = "June",
[06] = "July",
[07] = "August",
[08] = "September",
[09] = "October",
[10] = "November",
[11] = "December",
[12] = "Jan",
[13] = "Feb",
[14] = "Mar",
[15] = "Apr",
[16] = "May",
[17] = "Jun",
[18] = "Jul",
[19] = "Aug",
[20] = "Sep",
[21] = "Oct",
[22] = "Nov",
[23] = "Dec",
}
-- added the '.2' to avoid collision, use `fix` to remove
local sl_timezone = {
[000] = "utc",
[0.2] = "gmt",
[300] = "est",
[240] = "edt",
[360] = "cst",
[300.2] = "cdt",
[420] = "mst",
[360.2] = "mdt",
[480] = "pst",
[420.2] = "pdt",
}
-- set the day fraction resolution
local function setticks(t)
TICKSPERSEC = t
TICKSPERDAY = SECPERDAY * TICKSPERSEC
TICKSPERHOUR = SECPERHOUR * TICKSPERSEC
TICKSPERMIN = SECPERMIN * TICKSPERSEC
end
-- is year y leap year?
local function isleapyear(y) -- y must be int!
return (mod(y, 4) == 0 and (mod(y, 100) ~= 0 or mod(y, 400) == 0))
end
-- day since year 0
local function dayfromyear(y) -- y must be int!
return 365 * y + floor(y / 4) - floor(y / 100) + floor(y / 400)
end
-- day number from date, month is zero base
local function makedaynum(y, m, d)
local mm = mod(mod(m, 12) + 10, 12)
return dayfromyear(y + floor(m / 12) - floor(mm / 10))
+ floor((mm * 306 + 5) / 10)
+ d
- 307
--local yy = y + floor(m/12) - floor(mm/10)
--return dayfromyear(yy) + floor((mm*306 + 5)/10) + (d - 1)
end
-- date from day number, month is zero base
local function breakdaynum(g)
g = g + 306
local y = floor((10000 * g + 14780) / 3652425)
local d = g - dayfromyear(y)
if d < 0 then
y = y - 1
d = g - dayfromyear(y)
end
local mi = floor((100 * d + 52) / 3060)
return (floor((mi + 2) / 12) + y),
mod(mi + 2, 12),
(d - floor((mi * 306 + 5) / 10) + 1)
end
--[[ for floats or int32 Lua Number data type
local function breakdaynum2(g)
local g, n = g + 306;
local n400 = floor(g/DI400Y);n = mod(g,DI400Y);
local n100 = floor(n/DI100Y);n = mod(n,DI100Y);
local n004 = floor(n/DI4Y); n = mod(n,DI4Y);
local n001 = floor(n/365); n = mod(n,365);
local y = (n400*400) + (n100*100) + (n004*4) + n001 - ((n001 == 4 or n100 == 4) and 1 or 0)
local d = g - dayfromyear(y)
local mi = floor((100*d + 52)/3060)
return (floor((mi + 2)/12) + y), mod(mi + 2,12), (d - floor((mi*306 + 5)/10) + 1)
end
]]
-- day fraction from time
local function makedayfrc(h, r, s, t)
return ((h * 60 + r) * 60 + s) * TICKSPERSEC + t
end
-- time from day fraction
local function breakdayfrc(df)
return mod(floor(df / TICKSPERHOUR), HOURPERDAY),
mod(floor(df / TICKSPERMIN), MINPERHOUR),
mod(floor(df / TICKSPERSEC), SECPERMIN),
mod(df, TICKSPERSEC)
end
-- weekday sunday = 0, monday = 1 ...
local function weekday(dn)
return mod(dn + 1, 7)
end
-- yearday 0 based ...
local function yearday(dn)
return dn - dayfromyear((breakdaynum(dn)) - 1)
end
-- parse v as a month
local function getmontharg(v)
local m = tonumber(v)
return (m and fix(m - 1)) or inlist(tostring(v) or "", sl_months, 2)
end
-- get daynum of isoweek one of year y
local function isow1(y)
local f = makedaynum(y, 0, 4) -- get the date for the 4-Jan of year `y`
local d = weekday(f)
d = d == 0 and 7 or d -- get the ISO day number, 1 == Monday, 7 == Sunday
return f + (1 - d)
end
local function isowy(dn)
local w1
local y = (breakdaynum(dn))
if dn >= makedaynum(y, 11, 29) then
w1 = isow1(y + 1)
if dn < w1 then
w1 = isow1(y)
else
y = y + 1
end
else
w1 = isow1(y)
if dn < w1 then
w1 = isow1(y - 1)
y = y - 1
end
end
return floor((dn - w1) / 7) + 1, y
end
local function isoy(dn)
local y = (breakdaynum(dn))
return y
+ (
((dn >= makedaynum(y, 11, 29)) and (dn >= isow1(y + 1))) and 1
or (dn < isow1(y) and -1 or 0)
)
end
local function makedaynum_isoywd(y, w, d)
return isow1(y) + 7 * w + d - 8 -- simplified: isow1(y) + ((w-1)*7) + (d-1)
end
--[[ THE DATE MODULE ]]
--
local fmtstr = "%x %X"
--#if not DATE_OBJECT_AFX then
local date = {}
setmetatable(date, date)
-- Version: VMMMRRRR; V-Major, M-Minor, R-Revision; e.g. 5.45.321 == 50450321
do
local major = 2
local minor = 2
local revision = 0
date.version = major * 10000000 + minor * 10000 + revision
end
--#end -- not DATE_OBJECT_AFX
--[[ THE DATE OBJECT ]]
--
local dobj = {}
dobj.__index = dobj
dobj.__metatable = dobj
-- shout invalid arg
local function date_error_arg()
return error("invalid argument(s)", 0)
end
-- create new date object
local function date_new(dn, df)
return setmetatable({ daynum = dn, dayfrc = df }, dobj)
end
--#if not NO_LOCAL_TIME_SUPPORT then
-- magic year table
local date_epoch, yt
local function getequivyear(y)
assert(not yt)
yt = {}
local de = date_epoch:copy()
local dw, dy
for _ = 0, 3000 do
de:setyear(de:getyear() + 1, 1, 1)
dy = de:getyear()
dw = de:getweekday() * (isleapyear(dy) and -1 or 1)
if not yt[dw] then
yt[dw] = dy
end --print(de)
if
yt[1]
and yt[2]
and yt[3]
and yt[4]
and yt[5]
and yt[6]
and yt[7]
and yt[-1]
and yt[-2]
and yt[-3]
and yt[-4]
and yt[-5]
and yt[-6]
and yt[-7]
then
getequivyear = function(yy)
return yt[(weekday(makedaynum(yy, 0, 1)) + 1) * (isleapyear(y) and -1 or 1)]
end
return getequivyear(y)
end
end
end
-- TimeValue from date and time
local function totv(y, m, d, h, r, s)
return (makedaynum(y, m, d) - DATE_EPOCH) * SECPERDAY
+ ((h * 60 + r) * 60 + s)
end
-- TimeValue from TimeTable
local function tmtotv(tm)
return tm and totv(tm.year, tm.month - 1, tm.day, tm.hour, tm.min, tm.sec)
end
-- Returns the bias in seconds of utc time daynum and dayfrc
local function getbiasutc2(self)
local y, m, d = breakdaynum(self.daynum)
local h, r, s = breakdayfrc(self.dayfrc)
local tvu = totv(y, m, d, h, r, s) -- get the utc TimeValue of date and time
local tml = osdate("*t", tvu) -- get the local TimeTable of tvu
if not tml or (tml.year > (y + 1) or tml.year < (y - 1)) then -- failed try the magic
y = getequivyear(y)
tvu = totv(y, m, d, h, r, s)
tml = osdate("*t", tvu)
end
local tvl = tmtotv(tml)
if tvu and tvl then
return tvu - tvl, tvu, tvl
else
return error("failed to get bias from utc time")
end
end
-- Returns the bias in seconds of local time daynum and dayfrc
local function getbiasloc2(daynum, dayfrc)
local tvu
-- extract date and time
local y, m, d = breakdaynum(daynum)
local h, r, s = breakdayfrc(dayfrc)
-- get equivalent TimeTable
local tml = { year = y, month = m + 1, day = d, hour = h, min = r, sec = s }
-- get equivalent TimeValue
local tvl = tmtotv(tml)
local function chkutc()
tml.isdst = nil
local tvug = ostime(tml)
if tvug and (tvl == tmtotv(osdate("*t", tvug))) then
tvu = tvug
return
end
tml.isdst = true
local tvud = ostime(tml)
if tvud and (tvl == tmtotv(osdate("*t", tvud))) then
tvu = tvud
return
end
tvu = tvud or tvug
end
chkutc()
if not tvu then
tml.year = getequivyear(y)
tvl = tmtotv(tml)
chkutc()
end
return ((tvu and tvl) and (tvu - tvl)) or error(
"failed to get bias from local time"
),
tvu,
tvl
end
--#end -- not NO_LOCAL_TIME_SUPPORT
--#if not DATE_OBJECT_AFX then
-- the date parser
local strwalker = {} -- ^Lua regular expression is not as powerful as Perl$
strwalker.__index = strwalker
local function newstrwalker(s)
return setmetatable({ s = s, i = 1, e = 1, c = len(s) }, strwalker)
end
function strwalker:aimchr()
return "\n" .. self.s .. "\n" .. rep(".", self.e - 1) .. "^"
end
function strwalker:finish()
return self.i > self.c
end
function strwalker:back()
self.i = self.e
return self
end
function strwalker:restart()
self.i, self.e = 1, 1
return self
end
function strwalker:match(s)
return (find(self.s, s, self.i))
end
function strwalker:__call(s, f) -- print("strwalker:__call "..s..self:aimchr())
local is, ie
is, ie, self[1], self[2], self[3], self[4], self[5] = find(
self.s,
s,
self.i
)
if is then
self.e, self.i = self.i, 1 + ie
if f then
f(unpack(self))
end
return self
end
end
local function date_parse(str)
local y, m, d, h, r, s, z, w, u, j, e, x, c, dn, df
local sw = newstrwalker(gsub(gsub(str, "(%b())", ""), "^(%s*)", "")) -- remove comment, trim leading space
--local function error_out() print(y,m,d,h,r,s) end
local function error_dup(q) --[[error_out()]]
error("duplicate value: " .. (q or "") .. sw:aimchr())
end
local function error_syn(q) --[[error_out()]]
error("syntax error: " .. (q or "") .. sw:aimchr())
end
local function error_inv(q) --[[error_out()]]
error("invalid date: " .. (q or "") .. sw:aimchr())
end
local function sety(q)
y = y and error_dup() or tonumber(q)
end
local function setm(q)
m = (m or w or j) and error_dup(m or w or j) or tonumber(q)
end
local function setd(q)
d = d and error_dup() or tonumber(q)
end
local function seth(q)
h = h and error_dup() or tonumber(q)
end
local function setr(q)
r = r and error_dup() or tonumber(q)
end
local function sets(q)
s = s and error_dup() or tonumber(q)
end
local function adds(q)
s = s + tonumber(q)
end
local function setj(q)
j = (m or w or j) and error_dup() or tonumber(q)
end
local function setz(q)
z = (z ~= 0 and z) and error_dup() or q
end
local function setzn(zs, zn)
zn = tonumber(zn)
setz(
((zn < 24) and (zn * 60) or (mod(zn, 100) + floor(zn / 100) * 60))
* (zs == "+" and -1 or 1)
)
end
local function setzc(zs, zh, zm)
setz(((tonumber(zh) * 60) + tonumber(zm)) * (zs == "+" and -1 or 1))
end
if
not (
sw("^(%d%d%d%d)", sety)
and (sw("^(%-?)(%d%d)%1(%d%d)", function(_, a, b)
setm(tonumber(a))
setd(tonumber(b))
end) or sw("^(%-?)[Ww](%d%d)%1(%d?)", function(_, a, b)
w, u = tonumber(a), tonumber(b or 1)
end) or sw("^%-?(%d%d%d)", setj) or sw(
"^%-?(%d%d)",
function(a)
setm(a)
setd(1)
end
))
and (
(
sw("^%s*[Tt]?(%d%d):?", seth)
and sw("^(%d%d):?", setr)
and sw("^(%d%d)", sets)
and sw("^(%.%d+)", adds)
)
or sw:finish()
or (
sw("^%s*$")
or sw("^%s*[Zz]%s*$")
or sw("^%s-([%+%-])(%d%d):?(%d%d)%s*$", setzc)
or sw("^%s*([%+%-])(%d%d)%s*$", setzn)
)
)
)
then --print(y,m,d,h,r,s,z,w,u,j)
sw:restart()
y, m, d, h, r, s, z, w, u, j =
nil, nil, nil, nil, nil, nil, nil, nil, nil, nil
repeat -- print(sw:aimchr())
if sw("^[tT:]?%s*(%d%d?):", seth) then --print("$Time")
_ = sw("^%s*(%d%d?)", setr)
and sw("^%s*:%s*(%d%d?)", sets)
and sw("^(%.%d+)", adds)
elseif sw("^(%d+)[/\\%s,-]?%s*") then --print("$Digits")
x, c = tonumber(sw[1]), len(sw[1])
if (x >= 70) or (m and d and not y) or (c > 3) then
sety(
x
+ (
(x >= 100 or c > 3) and 0
or x < centuryflip and 2000
or 1900
)
)
else
if m then
setd(x)
else
m = x
end
end
elseif sw("^(%a+)[/\\%s,-]?%s*") then --print("$Words")
x = sw[1]
if inlist(x, sl_months, 2, sw) then
if m and not d and not y then
d, m = m, false
end
setm(mod(sw[0], 12) + 1)
elseif inlist(x, sl_timezone, 2, sw) then
c = fix(sw[0]) -- ignore gmt and utc
if c ~= 0 then
-- setz(c, x) -- wtf
setz(c) -- better
end
elseif not inlist(x, sl_weekdays, 2, sw) then
sw:back()
-- am pm bce ad ce bc
if
sw("^([bB])%s*(%.?)%s*[Cc]%s*(%2)%s*[Ee]%s*(%2)%s*")
or sw("^([bB])%s*(%.?)%s*[Cc]%s*(%2)%s*")
then
e = e and error_dup() or -1
elseif
sw("^([aA])%s*(%.?)%s*[Dd]%s*(%2)%s*")
or sw("^([cC])%s*(%.?)%s*[Ee]%s*(%2)%s*")
then
e = e and error_dup() or 1
elseif sw("^([PApa])%s*(%.?)%s*[Mm]?%s*(%2)%s*") then
x = lwr(sw[1]) -- there should be hour and it must be correct
if not h or (h > 12) or (h < 0) then
return error_inv()
end
if x == "a" and h == 12 then
h = 0
end -- am
if x == "p" and h ~= 12 then
h = h + 12
end -- pm
else
error_syn()
end
end
elseif
not (
sw("^([+-])(%d%d?):(%d%d)", setzc)
or sw("^([+-])(%d+)", setzn)
or sw("^[Zz]%s*$")
)
then -- sw{"([+-])",{"(%d%d?):(%d%d)","(%d+)"}}
error_syn("?")
end
sw("^%s*")
until sw:finish()
--else print("$Iso(Date|Time|Zone)")
end
-- if date is given, it must be complete year, month & day
if
(not y and not h)
or ((m and not d) or (d and not m))
or ((m and w) or (m and j) or (j and w))
then
return error_inv("!")
end
-- fix month
if m then
m = m - 1
end
-- fix year if we are on BCE
if e and e < 0 and y > 0 then
y = 1 - y
end
-- create date object
dn = (
y
and (
(w and makedaynum_isoywd(y, w, u))
or (j and makedaynum(y, 0, j))
or makedaynum(y, m, d)
)
) or DAYNUM_DEF
df = makedayfrc(h or 0, r or 0, s or 0, 0) + ((z or 0) * TICKSPERMIN)
--print("Zone",h,r,s,z,m,d,y,df)
return date_new(dn, df) -- no need to :normalize();
end
local function date_fromtable(v)
local y, m, d = fix(v.year), getmontharg(v.month), fix(v.day)
local h, r, s, t =
tonumber(v.hour), tonumber(v.min), tonumber(v.sec), tonumber(v.ticks)
-- atleast there is time or complete date
if (y or m or d) and not (y and m and d) then
return error("incomplete table")
end
return (y or h or r or s or t)
and date_new(
y and makedaynum(y, m, d) or DAYNUM_DEF,
makedayfrc(h or 0, r or 0, s or 0, t or 0)
)
end
local tmap = {
["number"] = function(v)
return date_epoch:copy():addseconds(v)
end,
["string"] = function(v)
return date_parse(v)
end,
["boolean"] = function(v)
return date_fromtable(osdate(v and "!*t" or "*t"))
end,
["table"] = function(v)
local ref = getmetatable(v) == dobj
return ref and v or date_fromtable(v), ref
end,
}
local function date_getdobj(v)
local o, r = (tmap[type(v)] or fnil)(v)
return (o and o:normalize() or error("invalid date time value")), r
-- if r is true then o is a reference to a date obj
end
--#end -- not DATE_OBJECT_AFX
local function date_from(arg1, arg2, arg3, arg4, arg5, arg6, arg7)
local y, m, d = fix(arg1), getmontharg(arg2), fix(arg3)
local h, r, s, t =
tonumber(arg4 or 0),
tonumber(arg5 or 0),
tonumber(arg6 or 0),
tonumber(arg7 or 0)
if y and m and d and h and r and s and t then
return date_new(makedaynum(y, m, d), makedayfrc(h, r, s, t)):normalize()
else
return date_error_arg()
end
end
--[[ THE DATE OBJECT METHODS ]]
--
function dobj:normalize()
local dn, df = fix(self.daynum), self.dayfrc
self.daynum, self.dayfrc =
dn + floor(df / TICKSPERDAY), mod(df, TICKSPERDAY)
return (dn >= DAYNUM_MIN and dn <= DAYNUM_MAX) and self
or error("date beyond imposed limits:" .. self)
end
function dobj:getdate()
local y, m, d = breakdaynum(self.daynum)
return y, m + 1, d
end
function dobj:gettime()
return breakdayfrc(self.dayfrc)
end
function dobj:getclockhour()
local h = self:gethours()
return h > 12 and mod(h, 12) or (h == 0 and 12 or h)
end
function dobj:getyearday()
return yearday(self.daynum) + 1
end
function dobj:getweekday()
return weekday(self.daynum) + 1
end -- in lua weekday is sunday = 1, monday = 2 ...
function dobj:getyear()
local r, _, _ = breakdaynum(self.daynum)
return r
end
function dobj:getmonth()
local _, r, _ = breakdaynum(self.daynum)
return r + 1
end -- in lua month is 1 base
function dobj:getday()
local _, _, r = breakdaynum(self.daynum)
return r
end
function dobj:gethours()
return mod(floor(self.dayfrc / TICKSPERHOUR), HOURPERDAY)
end
function dobj:getminutes()
return mod(floor(self.dayfrc / TICKSPERMIN), MINPERHOUR)
end
function dobj:getseconds()
return mod(floor(self.dayfrc / TICKSPERSEC), SECPERMIN)
end
function dobj:getfracsec()
return mod(floor(self.dayfrc / TICKSPERSEC), SECPERMIN)
+ (mod(self.dayfrc, TICKSPERSEC) / TICKSPERSEC)
end
function dobj:getticks(u)
local x = mod(self.dayfrc, TICKSPERSEC)
return u and ((x * u) / TICKSPERSEC) or x
end
function dobj:getweeknumber(wdb)
local wd, yd = weekday(self.daynum), yearday(self.daynum)
if wdb then
wdb = tonumber(wdb)
if wdb then
wd = mod(wd - (wdb - 1), 7) -- shift the week day base
else
return date_error_arg()
end
end
return (yd < wd and 0) or (floor(yd / 7) + ((mod(yd, 7) >= wd) and 1 or 0))
end
function dobj:getisoweekday()
return mod(weekday(self.daynum) - 1, 7) + 1
end -- sunday = 7, monday = 1 ...
function dobj:getisoweeknumber()
return (isowy(self.daynum))
end
function dobj:getisoyear()
return isoy(self.daynum)
end
function dobj:getisodate()
local w, y = isowy(self.daynum)
return y, w, self:getisoweekday()
end
function dobj:setisoyear(y, w, d)
local cy, cw, cd = self:getisodate()
if y then
cy = fix(tonumber(y))
end
if w then
cw = fix(tonumber(w))
end
if d then
cd = fix(tonumber(d))
end
if cy and cw and cd then
self.daynum = makedaynum_isoywd(cy, cw, cd)
return self:normalize()
else
return date_error_arg()
end
end
function dobj:setisoweekday(d)
return self:setisoyear(nil, nil, d)
end
function dobj:setisoweeknumber(w, d)
return self:setisoyear(nil, w, d)
end
function dobj:setyear(y, m, d)
local cy, cm, cd = breakdaynum(self.daynum)
if y then
cy = fix(tonumber(y))
end
if m then
cm = getmontharg(m)
end
if d then
cd = fix(tonumber(d))
end
if cy and cm and cd then
self.daynum = makedaynum(cy, cm, cd)
return self:normalize()
else
return date_error_arg()
end
end
function dobj:setmonth(m, d)
return self:setyear(nil, m, d)
end
function dobj:setday(d)
return self:setyear(nil, nil, d)
end
function dobj:sethours(h, m, s, t)
local ch, cm, cs, ck = breakdayfrc(self.dayfrc)
ch, cm, cs, ck =
tonumber(h or ch),
tonumber(m or cm),
tonumber(s or cs),
tonumber(t or ck)
if ch and cm and cs and ck then
self.dayfrc = makedayfrc(ch, cm, cs, ck)
return self:normalize()
else
return date_error_arg()
end
end
function dobj:setminutes(m, s, t)
return self:sethours(nil, m, s, t)
end
function dobj:setseconds(s, t)
return self:sethours(nil, nil, s, t)
end
function dobj:setticks(t)
return self:sethours(nil, nil, nil, t)
end
function dobj:spanticks()
return (self.daynum * TICKSPERDAY + self.dayfrc)
end
function dobj:spanseconds()
return (self.daynum * TICKSPERDAY + self.dayfrc) / TICKSPERSEC
end
function dobj:spanminutes()
return (self.daynum * TICKSPERDAY + self.dayfrc) / TICKSPERMIN
end
function dobj:spanhours()
return (self.daynum * TICKSPERDAY + self.dayfrc) / TICKSPERHOUR
end
function dobj:spandays()
return (self.daynum * TICKSPERDAY + self.dayfrc) / TICKSPERDAY
end
function dobj:addyears(y, m, d)
local cy, cm, cd = breakdaynum(self.daynum)
if y then
y = fix(tonumber(y))
else
y = 0
end
if m then
m = fix(tonumber(m))
else
m = 0
end
if d then
d = fix(tonumber(d))
else
d = 0
end
if y and m and d then
self.daynum = makedaynum(cy + y, cm + m, cd + d)
return self:normalize()
else
return date_error_arg()
end
end
function dobj:addmonths(m, d)
return self:addyears(nil, m, d)
end
local function dobj_adddayfrc(self, n, pt, pd)
n = tonumber(n)
if n then
local x = floor(n / pd)
self.daynum = self.daynum + x
self.dayfrc = self.dayfrc + (n - x * pd) * pt
return self:normalize()
else
return date_error_arg()
end
end
function dobj:adddays(n)
return dobj_adddayfrc(self, n, TICKSPERDAY, 1)
end
function dobj:addhours(n)
return dobj_adddayfrc(self, n, TICKSPERHOUR, HOURPERDAY)
end
function dobj:addminutes(n)
return dobj_adddayfrc(self, n, TICKSPERMIN, MINPERDAY)
end
function dobj:addseconds(n)
return dobj_adddayfrc(self, n, TICKSPERSEC, SECPERDAY)
end
function dobj:addticks(n)
return dobj_adddayfrc(self, n, 1, TICKSPERDAY)
end
local tvspec = {
-- Abbreviated weekday name (Sun)
["%a"] = function(self)
return sl_weekdays[weekday(self.daynum) + 7]
end,
-- Full weekday name (Sunday)
["%A"] = function(self)
return sl_weekdays[weekday(self.daynum)]
end,
-- Abbreviated month name (Dec)
["%b"] = function(self)
return sl_months[self:getmonth() - 1 + 12]
end,
-- Full month name (December)
["%B"] = function(self)
return sl_months[self:getmonth() - 1]
end,
-- Year/100 (19, 20, 30)
["%C"] = function(self)
return fmt("%.2d", fix(self:getyear() / 100))
end,
-- The day of the month as a number (range 1 - 31)
["%d"] = function(self)
return fmt("%.2d", self:getday())
end,
-- year for ISO 8601 week, from 00 (79)
["%g"] = function(self)
return fmt("%.2d", mod(self:getisoyear(), 100))
end,
-- year for ISO 8601 week, from 0000 (1979)
["%G"] = function(self)
return fmt("%.4d", self:getisoyear())
end,
-- same as %b
["%h"] = function(self)
return self:fmt0("%b")
end,
-- hour of the 24-hour day, from 00 (06)
["%H"] = function(self)
return fmt("%.2d", self:gethours())
end,
-- The hour as a number using a 12-hour clock (01 - 12)
["%I"] = function(self)
return fmt("%.2d", self:getclockhour())
end,
-- The day of the year as a number (001 - 366)
["%j"] = function(self)
return fmt("%.3d", self:getyearday())
end,
-- Month of the year, from 01 to 12
["%m"] = function(self)
return fmt("%.2d", self:getmonth())
end,
-- Minutes after the hour 55
["%M"] = function(self)
return fmt("%.2d", self:getminutes())
end,
-- AM/PM indicator (AM)
["%p"] = function(self)
return sl_meridian[self:gethours() > 11 and 1 or -1]
end, --AM/PM indicator (AM)
-- The second as a number (59, 20 , 01)
["%S"] = function(self)
return fmt("%.2d", self:getseconds())
end,
-- ISO 8601 day of the week, to 7 for Sunday (7, 1)
["%u"] = function(self)
return self:getisoweekday()
end,
-- Sunday week of the year, from 00 (48)
["%U"] = function(self)
return fmt("%.2d", self:getweeknumber())
end,
-- ISO 8601 week of the year, from 01 (48)
["%V"] = function(self)
return fmt("%.2d", self:getisoweeknumber())
end,
-- The day of the week as a decimal, Sunday being 0
["%w"] = function(self)
return self:getweekday() - 1
end,
-- Monday week of the year, from 00 (48)
["%W"] = function(self)
return fmt("%.2d", self:getweeknumber(2))
end,
-- The year as a number without a century (range 00 to 99)
["%y"] = function(self)
return fmt("%.2d", mod(self:getyear(), 100))
end,
-- Year with century (2000, 1914, 0325, 0001)
["%Y"] = function(self)
return fmt("%.4d", self:getyear())
end,
-- Time zone offset, the date object is assumed local time (+1000, -0230)
["%z"] = function(self)
local b = -self:getbias()
local x = abs(b)
return fmt(
"%s%.4d",
b < 0 and "-" or "+",
fix(x / 60) * 100 + floor(mod(x, 60))
)
end,
-- Time zone name, the date object is assumed local time
["%Z"] = function(self)
return self:gettzname()
end,
-- Misc --
-- Year, if year is in BCE, prints the BCE Year representation, otherwise result is similar to "%Y" (1 BCE, 40 BCE)
["%\b"] = function(self)
local x = self:getyear()
return fmt("%.4d%s", x > 0 and x or (-x + 1), x > 0 and "" or " BCE")
end,
-- Seconds including fraction (59.998, 01.123)
["%\f"] = function(self)
local x = self:getfracsec()
return fmt("%s%.9f", x >= 10 and "" or "0", x)
end,
-- percent character %
["%%"] = function(_)
return "%"
end,
-- Group Spec --
-- 12-hour time, from 01:00:00 AM (06:55:15 AM); same as "%I:%M:%S %p"
["%r"] = function(self)
return self:fmt0("%I:%M:%S %p")
end,
-- hour:minute, from 01:00 (06:55); same as "%I:%M"
["%R"] = function(self)
return self:fmt0("%I:%M")
end,
-- 24-hour time, from 00:00:00 (06:55:15); same as "%H:%M:%S"
["%T"] = function(self)
return self:fmt0("%H:%M:%S")
end,
-- month/day/year from 01/01/00 (12/02/79); same as "%m/%d/%y"
["%D"] = function(self)
return self:fmt0("%m/%d/%y")
end,
-- year-month-day (1979-12-02); same as "%Y-%m-%d"
["%F"] = function(self)
return self:fmt0("%Y-%m-%d")
end,
-- The preferred date and time representation; same as "%x %X"
["%c"] = function(self)
return self:fmt0("%x %X")
end,
-- The preferred date representation, same as "%a %b %d %\b"
["%x"] = function(self)
return self:fmt0("%a %b %d %\b")
end,
-- The preferred time representation, same as "%H:%M:%\f"
["%X"] = function(self)
return self:fmt0("%H:%M:%\f")
end,
-- GroupSpec --
-- Iso format, same as "%Y-%m-%dT%T"
["${iso}"] = function(self)
return self:fmt0("%Y-%m-%dT%T")
end,
-- http format, same as "%a, %d %b %Y %T GMT"
["${http}"] = function(self)
return self:fmt0("%a, %d %b %Y %T GMT")
end,
-- ctime format, same as "%a %b %d %T GMT %Y"
["${ctime}"] = function(self)
return self:fmt0("%a %b %d %T GMT %Y")
end,
-- RFC850 format, same as "%A, %d-%b-%y %T GMT"
["${rfc850}"] = function(self)
return self:fmt0("%A, %d-%b-%y %T GMT")
end,
-- RFC1123 format, same as "%a, %d %b %Y %T GMT"
["${rfc1123}"] = function(self)
return self:fmt0("%a, %d %b %Y %T GMT")
end,
-- asctime format, same as "%a %b %d %T %Y"
["${asctime}"] = function(self)
return self:fmt0("%a %b %d %T %Y")
end,
}
function dobj:fmt0(str)
return (
gsub(str, "%%[%a%%\b\f]", function(x)
local f = tvspec[x]
return (f and f(self)) or x
end)
)
end
function dobj:fmt(str)
str = str or self.fmtstr or fmtstr
return self:fmt0(
(gmatch(str, "${%w+}"))
and (gsub(str, "${%w+}", function(x)
local f = tvspec[x]
return (f and f(self)) or x
end))
or str
)
end
function dobj.__lt(a, b)
if a.daynum == b.daynum then
return (a.dayfrc < b.dayfrc)
else
return (a.daynum < b.daynum)
end
end
function dobj.__le(a, b)
if a.daynum == b.daynum then
return (a.dayfrc <= b.dayfrc)
else
return (a.daynum <= b.daynum)
end
end
function dobj.__eq(a, b)
return (a.daynum == b.daynum) and (a.dayfrc == b.dayfrc)
end
function dobj.__sub(a, b)
local d1, d2 = date_getdobj(a), date_getdobj(b)
local d0 = d1
and d2
and date_new(d1.daynum - d2.daynum, d1.dayfrc - d2.dayfrc)
return d0 and d0:normalize()
end
function dobj.__add(a, b)
local d1, d2 = date_getdobj(a), date_getdobj(b)
local d0 = d1
and d2
and date_new(d1.daynum + d2.daynum, d1.dayfrc + d2.dayfrc)
return d0 and d0:normalize()
end
function dobj.__concat(a, b)
return tostring(a) .. tostring(b)
end
function dobj:__tostring()
return self:fmt()
end
function dobj:copy()
return date_new(self.daynum, self.dayfrc)
end
--[[ THE LOCAL DATE OBJECT METHODS ]]
--
function dobj:tolocal()
local dn, df = self.daynum, self.dayfrc
local bias = getbiasutc2(self)
if bias then
-- utc = local + bias; local = utc - bias
self.daynum = dn
self.dayfrc = df - bias * TICKSPERSEC
return self:normalize()
else
return nil
end
end
function dobj:toutc()
local dn, df = self.daynum, self.dayfrc
local bias = getbiasloc2(dn, df)
if bias then
-- utc = local + bias;
self.daynum = dn
self.dayfrc = df + bias * TICKSPERSEC
return self:normalize()
else
return nil
end
end
function dobj:getbias()
return (getbiasloc2(self.daynum, self.dayfrc)) / SECPERMIN
end
function dobj:gettzname()
local _, tvu, _ = getbiasloc2(self.daynum, self.dayfrc)
return tvu and osdate("%Z", tvu) or ""
end
--#if not DATE_OBJECT_AFX then
function date.time(h, r, s, t)
h, r, s, t =
tonumber(h or 0), tonumber(r or 0), tonumber(s or 0), tonumber(t or 0)
if h and r and s and t then
return date_new(DAYNUM_DEF, makedayfrc(h, r, s, t))
else
return date_error_arg()
end
end
function date:__call(arg1, ...)
local arg_count = select("#", ...) + (arg1 == nil and 0 or 1)
if arg_count > 1 then
return (date_from(arg1, ...))
elseif arg_count == 0 then
return (date_getdobj(false))
else
local o, r = date_getdobj(arg1)
return r and o:copy() or o
end
end
date.diff = dobj.__sub
function date.isleapyear(v)
local y = fix(v)
if not y then
y = date_getdobj(v)
y = y and y:getyear()
end
return isleapyear(y + 0)
end
function date.epoch()
return date_epoch:copy()
end
function date.isodate(y, w, d)
return date_new(
makedaynum_isoywd(y + 0, w and (w + 0) or 1, d and (d + 0) or 1),
0
)
end
function date.setcenturyflip(y)
if y ~= floor(y) or y < 0 or y > 100 then
date_error_arg()
end
centuryflip = y
end
function date.getcenturyflip()
return centuryflip
end
-- Internal functions
function date.fmt(str)
if str then
fmtstr = str
end
return fmtstr
end
function date.daynummin(n)
DAYNUM_MIN = (n and n < DAYNUM_MAX) and n or DAYNUM_MIN
return n and DAYNUM_MIN or date_new(DAYNUM_MIN, 0):normalize()
end
function date.daynummax(n)
DAYNUM_MAX = (n and n > DAYNUM_MIN) and n or DAYNUM_MAX
return n and DAYNUM_MAX or date_new(DAYNUM_MAX, 0):normalize()
end
function date.ticks(t)
if t then
setticks(t)
end
return TICKSPERSEC
end
--#end -- not DATE_OBJECT_AFX
local tm = osdate("!*t", 0)
if tm then
date_epoch = date_new(
makedaynum(tm.year, tm.month - 1, tm.day),
makedayfrc(tm.hour, tm.min, tm.sec, 0)
)
-- the distance from our epoch to os epoch in daynum
DATE_EPOCH = date_epoch and date_epoch:spandays()
else -- error will be raise only if called!
date_epoch = setmetatable({}, {
__index = function()
error("failed to get the epoch date")
end,
})
end
--#if not DATE_OBJECT_AFX then
return date
--#else
--$return date_from
--#end
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