github.com/sohaha/zlsgo@v1.7.13-0.20240501141223-10dd1a906f76/ztype/decimal.go (about)

     1  package ztype
     2  
     3  import (
     4  	"math"
     5  	"strconv"
     6  	"strings"
     7  )
     8  
     9  var tenToAny = [...]string{0: "0", 1: "1", 2: "2", 3: "3", 4: "4", 5: "5", 6: "6", 7: "7", 8: "8", 9: "9", 10: "a", 11: "b", 12: "c", 13: "d", 14: "e", 15: "f", 16: "g", 17: "h", 18: "i", 19: "j", 20: "k", 21: "l", 22: "m", 23: "n", 24: "o", 25: "p", 26: "q", 27: "r", 28: "s", 29: "t", 30: "u", 31: "v", 32: "w", 33: "x", 34: "y", 35: "z", 36: "A", 37: "B", 38: "C", 39: "D", 40: "E", 41: "F", 42: "G", 43: "H", 44: "I", 45: "J", 46: "K", 47: "L", 48: "M", 49: "N", 50: "O", 51: "P", 52: "Q", 53: "R", 54: "S", 55: "T", 56: "U", 57: "V", 58: "W", 59: "X", 60: "Y", 61: "Z", 62: "_", 63: "-", 64: "|", 65: "<"}
    10  
    11  // DecimalToAny Convert decimal to arbitrary decimal values
    12  func DecimalToAny(value, base int) (newNumStr string) {
    13  	if base < 2 {
    14  		return
    15  	}
    16  	if base <= 32 {
    17  		return strconv.FormatInt(int64(value), base)
    18  	}
    19  	var (
    20  		remainder       int
    21  		remainderString string
    22  	)
    23  	for value != 0 {
    24  		remainder = value % base
    25  		if remainder < 66 && remainder > 9 {
    26  			remainderString = tenToAny[remainder]
    27  		} else {
    28  			remainderString = strconv.FormatInt(int64(remainder), 10)
    29  		}
    30  		newNumStr = remainderString + newNumStr
    31  		value = value / base
    32  	}
    33  	return
    34  }
    35  
    36  // AnyToDecimal Convert arbitrary decimal values to decimal
    37  func AnyToDecimal(value string, base int) (v int) {
    38  	if base < 2 {
    39  		return
    40  	}
    41  	if base <= 32 {
    42  		n, _ := strconv.ParseInt(value, base, 64)
    43  		v = int(n)
    44  		return
    45  	}
    46  	n := 0.0
    47  	nNum := len(strings.Split(value, "")) - 1
    48  	for _, v := range strings.Split(value, "") {
    49  		tmp := float64(findKey(v))
    50  		if tmp != -1 {
    51  			n = n + tmp*math.Pow(float64(base), float64(nNum))
    52  			nNum = nNum - 1
    53  		} else {
    54  			break
    55  		}
    56  	}
    57  	v = int(n)
    58  	return
    59  }
    60  
    61  func findKey(in string) int {
    62  	result := -1
    63  	for k, v := range tenToAny {
    64  		if in == v {
    65  			result = k
    66  		}
    67  	}
    68  	return result
    69  }