@genexus/web-standard-functions/dist/lib-esm/bigNumber/roundToEven.js

GeneXus JavaScript standard functions library for web generators

import { divide } from "../math/divide";
import { multiply } from "../math/multiply";
import { subtract } from "../math/subtract";
import { GxBigNumber } from "../types/gxbignumber";
import { modBigNumber } from "./mod";
import { roundBigNumber } from "./round";
/**
 * Rounds to even the given number to the specified number of decimal digits
 * @param {GxBigNumber} value
 * @param {GxBigNumber} digits
 * @returns GxBigNumber
 */
export const roundToEvenBigNumber = (value, digits) => {
    let digitsAux = Number(digits.toString());
    const multiplier = Math.pow(10, digitsAux || 0);
    const valToRound = multiply(value, new GxBigNumber(multiplier));
    let int = new GxBigNumber(valToRound.toString().split(".")[0]);
    const decimalPart = subtract(valToRound, int);
    let rounded = roundBigNumber(valToRound, new GxBigNumber(0));
    if (GxBigNumber.compare(decimalPart, new GxBigNumber(0.5)) === 0 &&
        GxBigNumber.compare(modBigNumber(rounded, new GxBigNumber(2)), new GxBigNumber(0)) !== 0) {
        rounded = subtract(rounded, 1);
    }
    return divide(rounded, multiplier);
};
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