ut2/es/internals/decimalAdjust.js

一个现代 JavaScript 实用工具库。[点击查看在线文档]。

import isFinite from '../isFinite.js';
import toInteger from '../toInteger.js';
import toNumber from '../toNumber.js';
import toString from '../toString.js';
import { mathMin } from './native.js';

function decimalAdjust(type, value, precision) {
    if (precision === void 0) { precision = 0; }
    var func = Math[type];
    value = toNumber(value);
    precision = mathMin(toInteger(precision), 292);
    if (precision === 0 || !isFinite(value)) {
        return func(value);
    }
    var pair = toString(value).split('e');
    value = func(+(pair[0] + 'e' + (pair[1] ? +pair[1] + precision : precision)));
    pair = toString(value).split('e');
    return +(pair[0] + 'e' + (pair[1] ? +pair[1] - precision : -precision));
}

export { decimalAdjust as default };