private static Rational scaleRatio(Rational ratio, int num, int den) {
int common = gcd(num, den);
num /= common;
den /= common;
return new Rational(
(int) (ratio.getNumerator() * (double) num), // saturate to int
(int) (ratio.getDenominator() * (double) den)); // saturate to int
}
static Range<Rational> parseRationalRange(Object o, Range<Rational> fallback) {
try {
String s = (String) o;
int ix = s.indexOf('-');
if (ix >= 0) {
return Range.create(
Rational.parseRational(s.substring(0, ix)),
Rational.parseRational(s.substring(ix + 1)));
}
Rational value = Rational.parseRational(s);
return Range.create(value, value);
} catch (ClassCastException e) {
} catch (NumberFormatException e) {
} catch (NullPointerException e) {
return fallback;
} catch (IllegalArgumentException e) {
}
Log.w(TAG, "could not parse rational range '" + o + "'");
return fallback;
}