@numio/bigmath/src/operations/add/add.js

@numio/bigmath is an arbitrary-precision arithmetic library. It can be used for basic operations with decimal numbers (integers and float)

import { bi2s, calcInner, s2bi, tryBigInt, tryNumber, } from "../../shared/utils.js";
const MAX_SUM = 8e+15;
const MIN_SUM = 8e-15;
/** This function adds numbers (as string). */
export const add = (array) => {
    const arrayInner = Array(array.length);
    let sum = 0;
    let i = 0;
    let j = 0;
    let fpi = 0;
    while (i < array.length) {
        fpi = array[i].indexOf(".");
        if (array[i].length <= 15 && fpi === -1) {
            sum += tryNumber(array[i]);
        }
        else {
            arrayInner[j] = s2bi(array[i], fpi);
            j += 1;
        }
        i += 1;
        if (sum > MAX_SUM || sum < MIN_SUM) {
            arrayInner[j] = [tryBigInt(sum), 0];
            sum = 0;
            j += 1;
        }
    }
    if (i !== j)
        arrayInner.length = j + 1;
    arrayInner[j] = [tryBigInt(sum), 0];
    const bi = calcInner(arrayInner, (a, b) => a + b);
    return bi2s(bi);
};