"use strict";
|
const common_vendor = require("../../../../common/vendor.js");
|
function strip(num, precision = 15) {
|
return +parseFloat(Number(num).toPrecision(precision));
|
}
|
function digitLength(num) {
|
const eSplit = num.toString().split(/[eE]/);
|
const len = (eSplit[0].split(".")[1] || "").length - +(eSplit[1] || 0);
|
return len > 0 ? len : 0;
|
}
|
function float2Fixed(num) {
|
if (num.toString().indexOf("e") === -1) {
|
return Number(num.toString().replace(".", ""));
|
}
|
const dLen = digitLength(num);
|
return dLen > 0 ? strip(Number(num) * Math.pow(10, dLen)) : Number(num);
|
}
|
function checkBoundary(num) {
|
{
|
if (num > Number.MAX_SAFE_INTEGER || num < Number.MIN_SAFE_INTEGER) {
|
common_vendor.index.__f__("warn", "at uni_modules/uview-plus/libs/function/digit.js:45", `${num} 超出了精度限制，结果可能不正确`);
|
}
|
}
|
}
|
function iteratorOperation(arr, operation) {
|
const [num1, num2, ...others] = arr;
|
let res = operation(num1, num2);
|
others.forEach((num) => {
|
res = operation(res, num);
|
});
|
return res;
|
}
|
function times(...nums) {
|
if (nums.length > 2) {
|
return iteratorOperation(nums, times);
|
}
|
const [num1, num2] = nums;
|
const num1Changed = float2Fixed(num1);
|
const num2Changed = float2Fixed(num2);
|
const baseNum = digitLength(num1) + digitLength(num2);
|
const leftValue = num1Changed * num2Changed;
|
checkBoundary(leftValue);
|
return leftValue / Math.pow(10, baseNum);
|
}
|
function divide(...nums) {
|
if (nums.length > 2) {
|
return iteratorOperation(nums, divide);
|
}
|
const [num1, num2] = nums;
|
const num1Changed = float2Fixed(num1);
|
const num2Changed = float2Fixed(num2);
|
checkBoundary(num1Changed);
|
checkBoundary(num2Changed);
|
return times(num1Changed / num2Changed, strip(Math.pow(10, digitLength(num2) - digitLength(num1))));
|
}
|
function round(num, ratio) {
|
const base = Math.pow(10, ratio);
|
let result = divide(Math.round(Math.abs(times(num, base))), base);
|
if (num < 0 && result !== 0) {
|
result = times(result, -1);
|
}
|
return result;
|
}
|
exports.round = round;
|
//# sourceMappingURL=../../../../../.sourcemap/mp-weixin/uni_modules/uview-plus/libs/function/digit.js.map
|
