locutus/esm/php/bc/bcscale.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

import { _bc } from "../_helpers/_bc.js";
export function bcscale(scale) {
    //  discuss at: https://locutus.io/php/bcscale/
    // original by: lmeyrick (https://sourceforge.net/projects/bcmath-js/)
    //   example 1: bcscale(1)
    //   returns 1: 0
    const libbcmath = _bc();
    const oldScale = libbcmath.scale;
    if (scale == null) {
        return oldScale;
    }
    const parsedScale = Number.parseInt(String(scale), 10);
    if (Number.isNaN(parsedScale)) {
        return false;
    }
    if (parsedScale < 0) {
        return false;
    }
    libbcmath.scale = parsedScale;
    return oldScale;
}