1/* 2 * Copyright (c) 2024 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15export function ConvertLunarCalendar(gregorianCalendarYear, gregorianCalendarMonth, gregorianCalendarDay) { 16 let lunarIndex1 = 2, 17 lunarIndex2 = 9, 18 lunarIndex3 = 10, 19 lunarIndex4 = 11, 20 lunarDay1 = 20, 21 lunarDay2 = 21, 22 hour = 24, 23 minutes = 60, 24 multiple = 1000, 25 initialLunarTime = 1949 26 27 let lunarMonth = ['正', '二', '三', '四', '五', '六', '七', '八', '九', '十', '冬', '腊'], 28 lunarDay = ['一', '二', '三', '四', '五', '六', '七', '八', '九', '十', '初', '廿'], 29 heavenlyStemsAnd = ['甲', '乙', '丙', '丁', '戊', '己', '庚', '辛', '壬', '癸'], 30 earthlyBranches = ['子', '丑', '寅', '卯', '辰', '巳', '午', '未', '申', '酉', '戌', '亥']; 31 32 let LUNAR_MON_START_INDEX = 0 33 let LUNAR_MON_END_INDEX = 11 34 35 let lunarCalendar = [ 36 0x0b557, 37 0x06ca0, 0x0b550, 0x15355, 0x04da0, 0x0a5b0, 0x14573, 0x052b0, 0x0a9a8, 0x0e950, 0x06aa0, 38 0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260, 0x0f263, 0x0d950, 0x05b57, 0x056a0, 39 0x096d0, 0x04dd5, 0x04ad0, 0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b6a0, 0x195a6, 40 0x095b0, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50, 0x06d40, 0x0af46, 0x0ab60, 0x09570, 41 0x04af5, 0x04970, 0x064b0, 0x074a3, 0x0ea50, 0x06b58, 0x055c0, 0x0ab60, 0x096d5, 0x092e0, 42 0x0c960, 0x0d954, 0x0d4a0, 0x0da50, 0x07552, 0x056a0, 0x0abb7, 0x025d0, 0x092d0, 0x0cab5, 43 0x0a950, 0x0b4a0, 0x0baa4, 0x0ad50, 0x055d9, 0x04ba0, 0x0a5b0, 0x15176, 0x052b0, 0x0a930, 44 0x07954, 0x06aa0, 0x0ad50, 0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0, 0x0d260, 0x0ea65, 0x0d530, 45 0x05aa0, 0x076a3, 0x096d0, 0x04afb, 0x04ad0, 0x0a4d0, 0x1d0b6, 0x0d250, 0x0d520, 0x0dd45, 46 0x0b5a0, 0x056d0, 0x055b2, 0x049b0, 0x0a577, 0x0a4b0, 0x0aa50, 0x1b255, 0x06d20, 0x0ada0, 47 0x14b63, 0x09370, 0x049f8, 0x04970, 0x064b0, 0x168a6, 0x0ea50, 0x06b20, 0x1a6c4, 0x0aae0, 48 0x0a2e0, 0x0d2e3, 0x0c960, 0x0d557, 0x0d4a0, 0x0da50, 0x05d55, 0x056a0, 0x0a6d0, 0x055d4, 49 0x052d0, 0x0a9b8, 0x0a950, 0x0b4a0, 0x0b6a6, 0x0ad50, 0x055a0, 0x0aba4, 0x0a5b0, 0x052b0, 50 0x0b273, 0x06930, 0x07337, 0x06aa0, 0x0ad50, 0x14b55, 0x04b60, 0x0a570, 0x054e4, 0x0d160, 51 0x0e968, 0x0d520, 0x0daa0, 0x16aa6, 0x056d0, 0x04ae0, 0x0a9d4, 0x0a2d0, 0x0d150, 0x0f252, 52 0x0d520 53 ] 54 55 function ConvertLunarCalendar(gregorianCalendarYear, gregorianCalendarMonth, gregorianCalendarDay) { 56 gregorianCalendarMonth -= 1; 57 let daySpan = (Date.UTC(gregorianCalendarYear, gregorianCalendarMonth, gregorianCalendarDay) - Date.UTC(initialLunarTime, 0, leapFebruarySmallDay)) / (hour * minutes * minutes * multiple) + 1; 58 let outputLunarYear, outputLunarMonth, outputLunarDay; 59 for (let j = 0; j < lunarCalendar.length; j++) { 60 daySpan -= lunarYearDays(lunarCalendar[j]); 61 if (daySpan <= 0) { 62 outputLunarYear = initialLunarTime + j; 63 daySpan += lunarYearDays(lunarCalendar[j]); 64 break 65 } 66 } 67 let k = 0 68 for (; k < lunarYearMonths(lunarCalendar[outputLunarYear - initialLunarTime]).length; k++) { 69 daySpan -= lunarYearMonths(lunarCalendar[outputLunarYear - initialLunarTime])[k]; 70 if (daySpan <= 0) { 71 if (hasLeapMonth(lunarCalendar[outputLunarYear - initialLunarTime]) > -1 && hasLeapMonth(lunarCalendar[outputLunarYear - initialLunarTime]) <= k) { 72 if (hasLeapMonth(lunarCalendar[outputLunarYear - initialLunarTime]) < k) { 73 outputLunarMonth = k; 74 } else if (hasLeapMonth(lunarCalendar[outputLunarYear - initialLunarTime]) === k) { 75 outputLunarMonth = '闰' + k; 76 } else { 77 outputLunarMonth = k + 1; 78 } 79 } else { 80 outputLunarMonth = k + 1; 81 } 82 daySpan += lunarYearMonths(lunarCalendar[outputLunarYear - initialLunarTime])[k]; 83 break 84 } 85 } 86 if (outputLunarMonth == undefined) { 87 outputLunarMonth = (k > LUNAR_MON_END_INDEX) ? LUNAR_MON_END_INDEX + 1 : k; 88 outputLunarMonth = (k == LUNAR_MON_START_INDEX) ? LUNAR_MON_START_INDEX + 1 : k; 89 } else { 90 outputLunarMonth = (outputLunarMonth > LUNAR_MON_END_INDEX) ? LUNAR_MON_END_INDEX + 1 : outputLunarMonth; 91 outputLunarMonth = (outputLunarMonth == LUNAR_MON_START_INDEX) ? LUNAR_MON_START_INDEX + 1 : outputLunarMonth; 92 } 93 94 outputLunarDay = daySpan; 95 if (hasLeapMonth(lunarCalendar[outputLunarYear - initialLunarTime]) > -1 && (typeof (outputLunarMonth) === 'string' && outputLunarMonth.indexOf('闰') > -1)) { 96 let reg = /\d/.exec(outputLunarMonth) 97 outputLunarMonth = `闰${lunarMonth[Number(reg)- 1]}` 98 } else { 99 outputLunarMonth = lunarMonth[outputLunarMonth - 1]; 100 } 101 outputLunarYear = getHeavenlyStemsAnd(outputLunarYear) + getEarthlyBranches(outputLunarYear); 102 if (outputLunarDay < lunarIndex4) { 103 outputLunarDay = `${lunarDay[lunarIndex3]}${lunarDay[outputLunarDay-1]}` 104 } else if (outputLunarDay > lunarIndex3 && outputLunarDay < lunarDay1) { 105 outputLunarDay = `${lunarDay[lunarIndex2]}${lunarDay[outputLunarDay-lunarIndex4]}` 106 } else if (outputLunarDay === lunarDay1) { 107 outputLunarDay = `${lunarDay[1]}${lunarDay[lunarIndex2]}` 108 } else if (outputLunarDay > lunarDay1 && outputLunarDay < leapFebruaryBigDay) { 109 outputLunarDay = `${lunarDay[lunarIndex4]}${lunarDay[outputLunarDay-lunarDay2]}` 110 } else if (outputLunarDay === leapFebruaryBigDay) { 111 outputLunarDay = `${lunarDay[lunarIndex1]}${lunarDay[lunarIndex2]}` 112 } 113 return { 114 lunarYear: outputLunarYear, 115 lunarMonth: outputLunarMonth, 116 lunarDay: outputLunarDay, 117 } 118 } 119 120 function hasLeapMonth(outputLunarYear) { 121 let lastHexadecimalDigit = 0xf 122 if (outputLunarYear & lastHexadecimalDigit) { 123 return outputLunarYear & lastHexadecimalDigit 124 } else { 125 return -1 126 } 127 } 128 129 let leapFebruarySmallDay = 29, 130 leapFebruaryBigDay = 30 131 132 function leapMonthDays(outputLunarYear) { 133 let hexadecimalFirstDigit = 0xf0000 134 if (hasLeapMonth(outputLunarYear) > -1) { 135 return (outputLunarYear & hexadecimalFirstDigit) ? leapFebruaryBigDay : leapFebruarySmallDay 136 } else { 137 return 0 138 } 139 } 140 141 let convertToHexDigit = 0x8000, 142 convertToHex = 0x8 143 144 function lunarYearDays(outputLunarYear) { 145 let totalDays = 0; 146 for (let i = convertToHexDigit; i > convertToHex; i >>= 1) { 147 let monthDays = (outputLunarYear & i) ? leapFebruaryBigDay : leapFebruarySmallDay; 148 totalDays += monthDays; 149 } 150 if (hasLeapMonth(outputLunarYear) > -1) { 151 totalDays += leapMonthDays(outputLunarYear); 152 } 153 return totalDays 154 } 155 156 function lunarYearMonths(outputLunarYear) { 157 let monthArr = []; 158 for (let i = convertToHexDigit; i > convertToHex; i >>= 1) { 159 monthArr.push((outputLunarYear & i) ? leapFebruaryBigDay : leapFebruarySmallDay); 160 } 161 if (hasLeapMonth(outputLunarYear)) { 162 monthArr.splice(hasLeapMonth(outputLunarYear), 0, leapMonthDays(outputLunarYear)); 163 } 164 return monthArr 165 } 166 167 let Day3 = 3 168 169 function getHeavenlyStemsAnd(outputLunarYear) { 170 let heavenlyStemsAndKey = (outputLunarYear - Day3) % lunarIndex3; 171 if (heavenlyStemsAndKey === 0) heavenlyStemsAndKey = lunarIndex3; 172 return heavenlyStemsAnd[heavenlyStemsAndKey - 1] 173 } 174 175 function getEarthlyBranches(outputLunarYear) { 176 let monthMultiple = 12 177 let EarthlyBranchesKey = (outputLunarYear - Day3) % monthMultiple; 178 if (EarthlyBranchesKey === 0) EarthlyBranchesKey = monthMultiple; 179 return earthlyBranches[EarthlyBranchesKey - 1] 180 } 181 182 return ConvertLunarCalendar(gregorianCalendarYear, gregorianCalendarMonth, gregorianCalendarDay) 183}