Function applyRounding

src/helpers.js:314–334

(val, ceil, e, round, roundingFunc, autoExponent)

 * @returns {Object} Object with rounded value and possibly incremented exponent
 */
export function applyRounding(val, ceil, e, round, roundingFunc, autoExponent) {
	let p;
	if (e > 0 && round > 0) {
		p = Math.pow(10, round);
	} else {
		p = 1;
	}
	let r;
	if (p === 1) {
		r = roundingFunc(val);
	} else {
		r = roundingFunc(val * p) / p;
	}

	if (r === ceil && e < 8 && autoExponent) {
		r = 1;
		e++;
	}

	return { value: r, e };
}

/**
 * Resolves the unit symbol for the given standard, bits mode, and exponent