update rapid lunar calc

basic/calendar_test.go

@@ -0,0 +1,126 @@
+package basic
+
+import (
+	"encoding/json"
+	"fmt"
+	"math"
+	"os"
+)
+
+func generateMagicNumber() {
+	//0月份 00000 日期 0000闰月 0000000000000 农历信息
+	var tz = 8.0000 / 24.000
+	yearMap := make(map[int][][]int) // {1 month,1 leap,2 29/30}
+	spYear := make(map[int][]int)
+	var upper []uint16
+	var lower []uint16
+	//var info uint32 = 0
+	for year := 1899; year <= 2401; year++ {
+		fmt.Println(year)
+		jieqi := GetJieqiLoops(year, 25)        //一年的节气
+		moon := GetMoonLoops(float64(year), 17) //一年朔月日
+		winter1 := jieqi[0] - 8.0/24 + tz       //第一年冬至日
+		winter2 := jieqi[24] - 8.0/24 + tz      //第二年冬至日
+		for idx, v := range moon {
+			if tz != 8.0/24 {
+				v = v - 8.0/24 + tz
+			}
+			if v-math.Floor(v) > 0.5 {
+				moon[idx] = math.Floor(v) + 0.5
+			} else {
+				moon[idx] = math.Floor(v) - 0.5
+			}
+		} //置闰月为0点
+		for idx, v := range jieqi {
+			if tz != 8.0/24 {
+				v = v - 8.0/24 + tz
+			}
+			if v-math.Floor(v) > 0.5 {
+				jieqi[idx] = math.Floor(v) + 0.5
+			} else {
+				jieqi[idx] = math.Floor(v) - 0.5
+			}
+		} //置节气为0点
+		mooncount := 0           //年内朔望月计数
+		var min, max int = 20, 0 //最大最小计数
+		for i := 0; i < 15; i++ {
+			if moon[i] >= winter1 && moon[i] < winter2 {
+				if i <= min {
+					min = i
+				}
+				if i >= max {
+					max = i
+				}
+				mooncount++
+			}
+		}
+		leapmonth := 20
+		if mooncount == 13 { //存在闰月
+			var j, i = 2, 0
+			for i = min; i <= max; i++ {
+				if !(moon[i] <= jieqi[j] && moon[i+1] > jieqi[j]) {
+					break
+				}
+				j += 2
+			}
+			leapmonth = i - min + 1
+		}
+		month := 11
+		for idx := min; idx <= max; idx++ {
+			leap := 0
+			if idx != leapmonth {
+				month++
+				if month > 12 {
+					month -= 12
+				}
+			} else {
+				leap = 1
+			}
+			if leap == 0 && month == 1 {
+				cp := JDE2Date(moon[idx])
+				spYear[year+1] = append(spYear[year+1], []int{int(cp.Month()), cp.Day()}...)
+			}
+			if idx < 6 && month > 10 {
+				yearMap[year] = append(yearMap[year], []int{month, leap, int(moon[idx+1] - moon[idx])})
+			} else {
+				yearMap[year+1] = append(yearMap[year+1], []int{month, leap, int(moon[idx+1] - moon[idx])})
+			}
+		}
+	}
+	for year := 1900; year <= 2400; year++ {
+		fmt.Println(year)
+		up, low := magicNumberSpilt(magicNumber(yearMap[year], spYear[year]))
+		upper = append(upper, up)
+		lower = append(lower, uint16(low))
+	}
+	res := make(map[string]interface{})
+	res["up"] = upper
+	res["low"] = lower
+	d, _ := json.Marshal(res)
+	os.WriteFile("test.json", d, 0644)
+}
+
+func magicNumber(y1 [][]int, y2 []int) int32 {
+	var res int32
+	res = int32(y2[1]) << 18
+	if y2[0] == 2 {
+		res = res | 0x800000
+	}
+	for idx, v := range y1 {
+		if v[2] == 30 {
+			res = res | (1 << (13 - idx))
+		}
+		if v[1] == 1 {
+			res = (res & 0xFC3FFF) | int32((v[0])<<14)
+		}
+	}
+	return res
+}
+
+func magicNumberSpilt(magic int32) (uint16, uint8) {
+	var upper uint16
+	var lower uint8
+	lower = uint8(magic)
+	upper = uint16(magic >> 8)
+	return upper, lower
+}