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+---------------------------------------------------------------------------------------
+-- Module for date and time calculations
+--
+-- Version 2.1.1
+-- Copyright (C) 2006, by Jas Latrix (jastejada@yahoo.com)
+-- Copyright (C) 2013-2014, by Thijs Schreijer
+-- Licensed under MIT, http://opensource.org/licenses/MIT
+
+--[[ 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 _;
+--[[ 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 pack = table.pack or function(...) return { n = select('#', ...), ... } end
+ local setmetatable = setmetatable
+ local getmetatable = getmetatable
+--[[ EXTRA FUNCTIONS ]]--
+ local fmt = string.format
+ local lwr = string.lower
+ local upr = string.upper
+ local rep = string.rep
+ local len = string.len
+ local sub = string.sub
+ local gsub = string.gsub
+ local gmatch = string.gmatch or string.gfind
+ 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
+ -- rounds a number;
+ local function round(n, d) d=d^10 return floor((n*d)+.5)/d end
+ -- rounds a number to whole;
+ local function whole(n)return floor(n+.5)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
+ local function fret(x)return x;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)
+ local 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
+ date.version = 20010001 -- 2.1.1
+--#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
+ -- is `v` a date object?
+ local function date_isdobj(v)
+ return (type(v) == 'table' and getmetatable(v) == dobj) and v
+ 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, dw, dy = date_epoch:copy()
+ for i = 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(y) return yt[ (weekday(makedaynum(y, 0, 1)) + 1) * (isleapyear(y) and -1 or 1) ] end
+ return getequivyear(y)
+ end
+ end
+ end
+ -- TimeValue from daynum and dayfrc
+ local function dvtotv(dn, df)
+ return fix(dn - DATE_EPOCH) * SECPERDAY + (df/1000)
+ 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, k, x,v,c, chkfin, 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;
+ 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 1900) )
+ else
+ if m then setd(x) else m = x end
+ end
+ elseif sw("^(%a+)[/\\%s,-]?%s*") then --print("$Words")
+ x = sw[1]
+ if inlist(x, sl_months, 2, sw) then
+ if m and (not d) and (not y) then d, m = m, false end
+ setm(mod(sw[0],12)+1)
+ elseif inlist(x, sl_timezone, 2, sw) then
+ c = fix(sw[0]) -- ignore gmt and utc
+ if c ~= 0 then setz(c, x) end
+ elseif inlist(x, sl_weekdays, 2, sw) then
+ k = sw[0]
+ else
+ sw:back()
+ -- am pm bce ad ce bc
+ if sw("^([bB])%s*(%.?)%s*[Cc]%s*(%2)%s*[Ee]%s*(%2)%s*") or sw("^([bB])%s*(%.?)%s*[Cc]%s*(%2)%s*") then
+ e = e and error_dup() or -1
+ elseif sw("^([aA])%s*(%.?)%s*[Dd]%s*(%2)%s*") or sw("^([cC])%s*(%.?)%s*[Ee]%s*(%2)%s*") then
+ e = e and error_dup() or 1
+ elseif sw("^([PApa])%s*(%.?)%s*[Mm]?%s*(%2)%s*") then
+ x = lwr(sw[1]) -- there should be hour and it must be correct
+ if (not h) or (h > 12) or (h < 0) then return error_inv() end
+ if x == 'a' and h == 12 then h = 0 end -- am
+ if x == 'p' and h ~= 12 then h = h + 12 end -- pm
+ else error_syn() end
+ end
+ elseif not(sw("^([+-])(%d%d?):(%d%d)",setzc) or sw("^([+-])(%d+)",setzn) or sw("^[Zz]%s*$")) 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(...)
+ local arg = pack(...)
+ local y, m, d = fix(arg[1]), getmontharg(arg[2]), fix(arg[3])
+ local h, r, s, t = tonumber(arg[4] or 0), tonumber(arg[5] or 0), tonumber(arg[6] or 0), tonumber(arg[7] 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(self) 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(...)
+ local arg = pack(...)
+ if arg.n > 1 then return (date_from(...))
+ elseif arg.n == 0 then return (date_getdobj(false))
+ else local o, r = date_getdobj(arg[1]); 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
+
+-- 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
+