4 changed files with 118 additions and 11 deletions
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const lunarMonths = ['', '正月', '二月', '三月', '四月', '五月', '六月', '七月', '八月', '九月', '十月', '冬月', '腊月']; |
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const lunarDays = ['', '初一', '初二', '初三', '初四', '初五', '初六', '初七', '初八', '初九', '初十', |
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'十一', '十二', '十三', '十四', '十五', '十六', '十七', '十八', '十九', '二十', |
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'廿一', '廿二', '廿三', '廿四', '廿五', '廿六', '廿七', '廿八', '廿九', '三十', |
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]; |
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const lunarInfo = [ |
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0x04bd8, 0x04ae0, 0x0a570, 0x054d5, 0x0d260, 0x0d950, 0x16554, 0x056a0, 0x09ad0, 0x055d2, |
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0x04ae0, 0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255, 0x0b540, 0x0d6a0, 0x0ada2, 0x095b0, 0x14977, |
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0x04970, 0x0a4b0, 0x0b4b5, 0x06a50, 0x06d40, 0x1ab54, 0x02b60, 0x09570, 0x052f2, 0x04970, |
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0x06566, 0x0d4a0, 0x0ea50, 0x06e95, 0x05ad0, 0x02b60, 0x186e3, 0x092e0, 0x1c8d7, 0x0c950, |
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0x0d4a0, 0x1d8a6, 0x0b550, 0x056a0, 0x1a5b4, 0x025d0, 0x092d0, 0x0d2b2, 0x0a950, 0x0b557, |
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0x06ca0, 0x0b550, 0x15355, 0x04da0, 0x0a5d0, 0x14573, 0x052d0, 0x0a9a8, 0x0e950, 0x06aa0, |
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0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260, 0x0f263, 0x0d950, 0x05b57, 0x056a0, |
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0x096d0, 0x04dd5, 0x04ad0, 0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b5a0, 0x195a6, |
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0x095b0, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50, 0x06d40, 0x0af46, 0x0ab60, 0x09570, |
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0x04af5, 0x04970, 0x064b0, 0x074a3, 0x0ea50, 0x06b58, 0x055c0, 0x0ab60, 0x096d5, 0x092e0, |
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0x0c960, 0x0d954, 0x0d4a0, 0x0da50, 0x07552, 0x056a0, 0x0abb7, 0x025d0, 0x092d0, 0x0cab5, |
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0x0a950, 0x0b4a0, 0x0baa4, 0x0ad50, 0x055d9, 0x04ba0, 0x0a5b0, 0x15176, 0x052b0, 0x0a930, |
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0x07954, 0x06aa0, 0x0ad50, 0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0, 0x0d260, 0x0ea65, 0x0d530, |
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0x05aa0, 0x076a3, 0x096d0, 0x04bd7, 0x04ad0, 0x0a4d0, 0x1d0b6, 0x0d250, 0x0d520, 0x0dd45, |
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0x0b5a0, 0x056d0, 0x055b2, 0x049b0, 0x0a577, 0x0a4b0, 0x0aa50, 0x1b255, 0x06d20, 0x0ada0 |
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]; |
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const lYearDays = (y) => { |
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let i, sum = 348; |
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for (i = 0x8000; i > 0x8; i >>= 1) { |
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sum += (lunarInfo[y - 1900] & i) ? 1 : 0; |
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} |
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return (sum + leapDays(y)); |
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}; |
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const leapMonth = (y) => { |
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return (lunarInfo[y - 1900] & 0xf); |
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}; |
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const leapDays = (y) => { |
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if (leapMonth(y)) { |
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return ((lunarInfo[y - 1900] & 0x10000) ? 30 : 29); |
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} |
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return (0); |
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}; |
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const monthDays = (y, m) => { |
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return ((lunarInfo[y - 1900] & (0x10000 >> m)) ? 30 : 29); |
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}; |
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export const getLunarDay = (date) => { |
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const year = date.getFullYear(); |
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const month = date.getMonth() + 1; |
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const day = date.getDate(); |
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if (year < 1900 || year > 2100) return ''; |
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let i, leap = 0, temp = 0; |
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let offset = (Date.UTC(year, month - 1, day) - Date.UTC(1900, 0, 31)) / 86400000; |
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for (i = 1900; i < 2101 && offset > 0; i++) { |
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temp = lYearDays(i); |
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offset -= temp; |
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} |
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if (offset < 0) { |
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offset += temp; |
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i--; |
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} |
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const lunarYear = i; |
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leap = leapMonth(i); |
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let isLeap = false; |
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for (i = 1; i < 13 && offset > 0; i++) { |
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if (leap > 0 && i === leap + 1 && isLeap === false) { |
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--i; |
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isLeap = true; |
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temp = leapDays(lunarYear); |
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} else { |
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temp = monthDays(lunarYear, i); |
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} |
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if (isLeap === true && i === leap + 1) { |
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isLeap = false; |
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} |
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offset -= temp; |
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} |
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if (offset === 0 && leap > 0 && i === leap + 1) { |
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if (isLeap) { |
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isLeap = false; |
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} else { |
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isLeap = true; |
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--i; |
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} |
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} |
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if (offset < 0) { |
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offset += temp; |
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--i; |
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} |
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const lunarMonth = i; |
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const lunarDay = Math.floor(offset) + 1; |
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if (lunarDay === 1) { |
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return lunarMonths[lunarMonth] || ''; |
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} |
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return lunarDays[lunarDay] || ''; |
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}; |
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