aureooms/js-integer

import {Integer} from './Integer.js';
import {MAX_BASE} from './_limits.js';

export function _from_number(number) {
    const x = number >= 0 ? number : -number;
    const is_negative = number >= 0 ? 0 : -1;
    return x < MAX_BASE
        ? new Integer(MAX_BASE, is_negative, [x])
        : new Integer(MAX_BASE, is_negative, [(x / MAX_BASE) | 0, x % MAX_BASE]);
}