use lexical_parse_float::float::ExtendedFloat80;
use lexical_parse_float::shared;
#[cfg(feature = "power-of-two")]
use lexical_util::format::NumberFormatBuilder;
#[test]
fn calculate_shift_test() {
assert_eq!(shared::calculate_shift::<f64>(-63), 64);
assert_eq!(shared::calculate_shift::<f64>(-15), 16);
assert_eq!(shared::calculate_shift::<f64>(-8), 11);
assert_eq!(shared::calculate_shift::<f64>(0), 11);
assert_eq!(shared::calculate_shift::<f64>(50), 11);
}
#[test]
#[cfg(feature = "power-of-two")]
fn calculate_power2_test() {
const BASE4: u128 = NumberFormatBuilder::from_radix(4);
assert_eq!(shared::calculate_power2::<f64, BASE4>(-63, 5), 944);
assert_eq!(shared::calculate_power2::<f64, BASE4>(-15, 5), 1040);
assert_eq!(shared::calculate_power2::<f64, BASE4>(-8, 0), 1059);
assert_eq!(shared::calculate_power2::<f64, BASE4>(-8, 5), 1054);
assert_eq!(shared::calculate_power2::<f64, BASE4>(0, 5), 1070);
assert_eq!(shared::calculate_power2::<f64, BASE4>(50, 5), 1170);
}
#[test]
fn log2_test() {
assert_eq!(shared::log2(2), 1);
assert_eq!(shared::log2(4), 2);
assert_eq!(shared::log2(10), 1);
}
#[test]
fn starts_with_test() {
assert_eq!(shared::starts_with(b"NaN".iter(), b"nAN".iter()), false);
assert_eq!(shared::starts_with(b"nAN".iter(), b"nAN".iter()), true);
assert_eq!(shared::starts_with(b"nAN1".iter(), b"nAN".iter()), true);
assert_eq!(shared::starts_with(b"nAN1".iter(), b"nAN12".iter()), false);
}
#[test]
fn starts_with_uncased_test() {
assert_eq!(shared::starts_with_uncased(b"NaN".iter(), b"nAN".iter()), true);
assert_eq!(shared::starts_with_uncased(b"nAN".iter(), b"nAN".iter()), true);
assert_eq!(shared::starts_with_uncased(b"nAN1".iter(), b"nAN".iter()), true);
assert_eq!(shared::starts_with_uncased(b"nAN1".iter(), b"nAN12".iter()), false);
}
#[test]
fn round_test() {
let mut fp = ExtendedFloat80 {
mant: 9223372036854776832,
exp: -10,
};
shared::round::<f64, _>(&mut fp, |f, s| {
f.mant >>= s;
f.exp += s;
});
assert_eq!(fp.mant, 0);
assert_eq!(fp.exp, 1);
let mut fp = ExtendedFloat80 {
mant: 9223372036854776832,
exp: -10,
};
shared::round::<f64, _>(&mut fp, |f, s| {
f.mant >>= s;
f.exp += s;
// Round-up.
f.mant += 1;
});
assert_eq!(fp.mant, 1);
assert_eq!(fp.exp, 1);
// Round-down
let mut fp = ExtendedFloat80 {
mant: 9223372036854776832,
exp: -10,
};
shared::round::<f64, _>(&mut fp, |f, s| {
shared::round_nearest_tie_even(f, s, |is_odd, is_halfway, is_above| {
is_above || (is_odd && is_halfway)
});
});
assert_eq!(fp.mant, 0);
assert_eq!(fp.exp, 1);
// Round up
let mut fp = ExtendedFloat80 {
mant: 9223372036854778880,
exp: -10,
};
shared::round::<f64, _>(&mut fp, |f, s| {
shared::round_nearest_tie_even(f, s, |is_odd, is_halfway, is_above| {
is_above || (is_odd && is_halfway)
});
});
assert_eq!(fp.mant, 2);
assert_eq!(fp.exp, 1);
// Round down
let mut fp = ExtendedFloat80 {
mant: 9223372036854778880,
exp: -10,
};
shared::round::<f64, _>(&mut fp, shared::round_down);
assert_eq!(fp.mant, 1);
assert_eq!(fp.exp, 1);
}
