Function log10

src/compute-engine/interval/elementary.ts:357–374

(x: Interval | IntervalResult)

 * Base-10 logarithm.
 */
export function log10(x: Interval | IntervalResult): IntervalResult {
  const unwrapped = unwrapOrPropagate(x);
  if (!Array.isArray(unwrapped)) return unwrapped;
  const [xVal] = unwrapped;
  if (xVal.hi <= 0) {
    return { kind: 'empty' };
  }

  if (xVal.lo > 0) {
    return ok({ lo: Math.log10(xVal.lo), hi: Math.log10(xVal.hi) });
  }

  return {
    kind: 'partial',
    value: { lo: -Infinity, hi: Math.log10(xVal.hi) },
    domainClipped: 'lo',
  };
}

/**
 * Base-2 logarithm.