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