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模块:Chinese calendar
来自奇葩栖息地
local p = {}
-- 农历数据表
local lunarInfo = {
0x04bd8,
0x04ae0,
0x0a570,
0x054d5,
0x0d260,
0x0d950,
0x16554,
0x056a0,
0x09ad0,
0x055d2,
0x04ae0,
0x0a5b6,
0x0a4d0,
0x0d250,
0x1d255,
0x0b540,
0x0d6a0,
0x0ada2,
0x095b0,
0x14977,
0x04970,
0x0a4b0,
0x0b4b5,
0x06a50,
0x06d40,
0x1ab54,
0x02b60,
0x09570,
0x052f2,
0x04970,
0x06566,
0x0d4a0,
0x0ea50,
0x06e95,
0x05ad0,
0x02b60,
0x186e3,
0x092e0,
0x1c8d7,
0x0c950,
0x0d4a0,
0x1d8a6,
0x0b550,
0x056a0,
0x1a5b4,
0x025d0,
0x092d0,
0x0d2b2,
0x0a950,
0x0b557,
0x06ca0,
0x0b550,
0x15355,
0x04da0,
0x0a5b0,
0x14573,
0x052b0,
0x0a9a8,
0x0e950,
0x06aa0,
0x0aea6,
0x0ab50,
0x04b60,
0x0aae4,
0x0a570,
0x05260,
0x0f263,
0x0d950,
0x05b57,
0x056a0,
0x096d0,
0x04dd5,
0x04ad0,
0x0a4d0,
0x0d4d4,
0x0d250,
0x0d558,
0x0b540,
0x0b6a0,
0x195a6,
0x095b0,
0x049b0,
0x0a974,
0x0a4b0,
0x0b27a,
0x06a50,
0x06d40,
0x0af46,
0x0ab60,
0x09570,
0x04af5,
0x04970,
0x064b0,
0x074a3,
0x0ea50,
0x06b58,
0x055c0,
0x0ab60,
0x096d5,
0x092e0,
0x0c960,
0x0d954,
0x0d4a0,
0x0da50,
0x07552,
0x056a0,
0x0abb7,
0x025d0,
0x092d0,
0x0cab5,
0x0a950,
0x0b4a0,
0x0baa4,
0x0ad50,
0x055d9,
0x04ba0,
0x0a5b0,
0x15176,
0x052b0,
0x0a930,
0x07954,
0x06aa0,
0x0ad50,
0x05b52,
0x04b60,
0x0a6e6,
0x0a4e0,
0x0d260,
0x0ea65,
0x0d530,
0x05aa0,
0x076a3,
0x096d0,
0x04afb,
0x04ad0,
0x0a4d0,
0x1d0b6,
0x0d250,
0x0d520,
0x0dd45,
0x0b5a0,
0x056d0,
0x055b2,
0x049b0,
0x0a577,
0x0a4b0,
0x0aa50,
0x1b255,
0x06d20,
0x0ada0,
0x14b63,
0x09370,
0x049f8,
0x04970,
0x064b0,
0x168a6,
0x0ea50,
0x06b20,
0x1a6c4,
0x0aae0,
0x0a2e0,
0x0d2e3,
0x0c960,
0x0d557,
0x0d4a0,
0x0da50,
0x05d55,
0x056a0,
0x0a6d0,
0x055d4,
0x052d0,
0x0a9b8,
0x0a950,
0x0b4a0,
0x0b6a6,
0x0ad50,
0x055a0,
0x0aba4,
0x0a5b0,
0x052b0,
0x0b273,
0x06930,
0x07337,
0x06aa0,
0x0ad50,
0x14b55,
0x04b60,
0x0a570,
0x054e4,
0x0d160,
0x0e968,
0x0d520,
0x0daa0,
0x16aa6,
0x056d0,
0x04ae0,
0x0a9d4,
0x0a2d0,
0x0d150,
0x0f252,
0x0d520
}
-- 天干
local Gan = { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" }
-- 地支
local Zhi = { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" }
-- 月份
local nStr3 = { "正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "冬", "腊" }
-- 日期
local nStr2 = { "初", "十", "廿", "卅" }
local nStr1 = { "日", "一", "二", "三", "四", "五", "六", "七", "八", "九", "十" }
-- 实现位运算函数
local function band(a, b)
if not a or not b then return 0 end
local result = 0
local bitval = 1
-- 处理负数或0的情况
if a <= 0 or b <= 0 then return 0 end
while a > 0 and b > 0 do
if a % 2 == 1 and b % 2 == 1 then
result = result + bitval
end
bitval = bitval * 2
a = math.floor(a/2)
b = math.floor(b/2)
end
return result
end
local function rshift(a, b)
if not a or not b then return 0 end
if a <= 0 then return 0 end
if b < 0 then return a end
return math.floor(a / (2^b))
end
-- 计算农历闰月月份
local function leapMonth(y)
if y < 1900 or y > 2100 then return 0 end
local index = y - 1900
if index < 0 or index >= #lunarInfo then return 0 end
return band(lunarInfo[index], 0xf)
end
-- 计算农历闰月天数
local function leapDays(y)
if y < 1900 or y > 2100 then return 0 end
local m = leapMonth(y)
if m == 0 then return 0 end
if band(lunarInfo[y - 1900], 0x10000) ~= 0 then
return 30
end
return 29
end
-- 计算农历年天数
local function lYearDays(y)
if y < 1900 or y > 2100 then return 0 end
local sum = 348
local i = 0x8000
local idx = y - 1900
if idx < 0 or idx >= #lunarInfo then return 0 end
while i > 0x8 do
if band(lunarInfo[idx], i) ~= 0 then
sum = sum + 1
end
i = rshift(i, 1)
end
return sum + leapDays(y)
end
-- 计算农历月份天数
local function monthDays(y, m)
if y < 1900 or y > 2100 then return 0 end
if m > 12 or m < 1 then return 0 end
if band(lunarInfo[y - 1900], rshift(0x10000, m)) ~= 0 then
return 30
end
return 29
end
-- 主要的转换函数
function p.toLunar(frame)
-- 解析输入日期
local date = frame.args[1] or frame:getParent().args.date
if not date then return "日期参数错误" end
local y, m, d = date:match("^(%d%d%d%d)-(%d%d?)-(%d%d?)$")
if not y or not m or not d then
return "日期格式错误"
end
y, m, d = tonumber(y), tonumber(m), tonumber(d)
-- 验证日期范围
if y < 1900 or y > 2100 then
return "年份超出范围(1900-2100)"
end
if m < 1 or m > 12 then
return "月份错误"
end
if d < 1 or d > 31 then
return "日期错误"
end
-- 计算距离1900年1月31日的天数
local baseDate = os.time({ year = 1900, month = 1, day = 31 })
local targetDate = os.time({ year = y, month = m, day = d })
local offset = math.floor((targetDate - baseDate) / (24 * 60 * 60))
-- 计算农历年
local ly = 1900
local temp = 0
while ly < 2101 and offset > 0 do
temp = lYearDays(ly)
offset = offset - temp
ly = ly + 1
end
if offset < 0 then
offset = offset + temp
ly = ly - 1
end
-- 计算农历月日
local lm = 1
local ld = 1
local isLeap = false
local leap = leapMonth(ly)
-- 计算月
while offset > 0 and lm < 13 do
if leap > 0 and lm == leap + 1 and not isLeap then
lm = lm - 1
isLeap = true
temp = leapDays(ly)
else
temp = monthDays(ly, lm)
end
offset = offset - temp
if isLeap and lm == leap + 1 then isLeap = false end
lm = lm + 1
end
-- 计算日
if offset == 0 and leap > 0 and lm == leap + 1 then
if isLeap then
isLeap = false
else
isLeap = true
lm = lm - 1
end
end
if offset < 0 then
offset = offset + temp
lm = lm - 1
end
ld = offset + 1
-- 格式化输出
local gzYear = Gan[((ly - 4) % 10) + 1] .. Zhi[((ly - 4) % 12) + 1]
local lMonth = nStr3[lm]
local lDay
if ld == 10 then
lDay = "初十"
elseif ld == 20 then
lDay = "二十"
elseif ld == 30 then
lDay = "三十"
else
lDay = nStr2[math.floor(ld / 10) + 1] .. nStr1[ld % 10 + 1]
end
return gzYear .. "年" .. lMonth .. "月" .. lDay
end
return p
