#![cfg(feature = "compact")]
use core::num;
use lexical_util::constants::BUFFER_SIZE;
use lexical_util::format::NumberFormatBuilder;
use lexical_write_float::float::{ExtendedFloat80, RawFloat};
use lexical_write_float::{compact, Options, RoundMode};
const DECIMAL: u128 = NumberFormatBuilder::decimal();
fn check_normalize(mant: u64, exp: i32, ymant: u64, yexp: i32) {
let mut x = ExtendedFloat80 {
mant,
exp,
};
if x.mant != 0 {
assert_eq!(x.mant & (1 << 63), 0);
compact::normalize(&mut x);
assert_eq!(x.mant & (1 << 63), 1 << 63);
}
assert_eq!(x, ExtendedFloat80 {
mant: ymant,
exp: yexp
});
}
#[test]
fn normalize_test() {
// f32 cases
check_normalize(0, 0, 0, 0);
check_normalize(1, -149, 9223372036854775808, -212);
check_normalize(71362, -149, 10043308644012916736, -196);
check_normalize(12379400, -90, 13611294244890214400, -130);
check_normalize(8388608, -23, 9223372036854775808, -63);
check_normalize(11368684, 43, 12500000250510966784, 3);
check_normalize(16777213, 104, 18446740775174668288, 64);
// Test a few cases from radix float writer errors.
check_normalize(5178144, -22, 11386859076597055488, -63);
// f64 cases
check_normalize(1, -1074, 9223372036854775808, -1137);
check_normalize(6448907850777164, -883, 13207363278391631872, -894);
check_normalize(7371020360979573, -551, 15095849699286165504, -562);
check_normalize(6427752177035961, -202, 13164036458569648128, -213);
check_normalize(4903985730770844, -185, 10043362776618688512, -196);
check_normalize(6646139978924579, -119, 13611294676837537792, -130);
check_normalize(4503599627370496, -52, 9223372036854775808, -63);
check_normalize(6103515625000000, 14, 12500000000000000000, 3);
check_normalize(8271806125530277, 80, 16940658945086007296, 69);
check_normalize(5503284107318959, 446, 11270725851789228032, 435);
check_normalize(6290184345309700, 778, 12882297539194265600, 767);
check_normalize(9007199254740991, 971, 18446744073709549568, 960);
// Check with errors from power-of-two.
check_normalize(72057594037927936, -1078, 9223372036854775808, -1085);
}
#[test]
fn normalized_boundaries_test() {
let fp = ExtendedFloat80 {
mant: 4503599627370496,
exp: -50,
};
let u = ExtendedFloat80 {
mant: 9223372036854775296,
exp: -61,
};
let l = ExtendedFloat80 {
mant: 9223372036854776832,
exp: -61,
};
let (upper, lower) = compact::normalized_boundaries::<f64>(&fp);
assert_eq!(upper, u);
assert_eq!(lower, l);
}
#[test]
fn from_f32_test() {
assert_eq!(compact::from_float(0.0f32), ExtendedFloat80 {
mant: 0,
exp: -149
});
assert_eq!(compact::from_float(-0.0f32), ExtendedFloat80 {
mant: 0,
exp: -149
});
assert_eq!(compact::from_float(1e-45f32), ExtendedFloat80 {
mant: 1,
exp: -149
});
assert_eq!(compact::from_float(1e-40f32), ExtendedFloat80 {
mant: 71362,
exp: -149
});
assert_eq!(compact::from_float(2e-40f32), ExtendedFloat80 {
mant: 142725,
exp: -149
});
assert_eq!(compact::from_float(1e-20f32), ExtendedFloat80 {
mant: 12379400,
exp: -90
});
assert_eq!(compact::from_float(2e-20f32), ExtendedFloat80 {
mant: 12379400,
exp: -89
});
assert_eq!(compact::from_float(1.0f32), ExtendedFloat80 {
mant: 8388608,
exp: -23
});
assert_eq!(compact::from_float(2.0f32), ExtendedFloat80 {
mant: 8388608,
exp: -22
});
assert_eq!(compact::from_float(1e20f32), ExtendedFloat80 {
mant: 11368684,
exp: 43
});
assert_eq!(compact::from_float(2e20f32), ExtendedFloat80 {
mant: 11368684,
exp: 44
});
assert_eq!(compact::from_float(3.402823e38f32), ExtendedFloat80 {
mant: 16777213,
exp: 104
});
}
#[test]
fn from_f64_test() {
assert_eq!(compact::from_float(0.0f64), ExtendedFloat80 {
mant: 0,
exp: -1074
});
assert_eq!(compact::from_float(-0.0f64), ExtendedFloat80 {
mant: 0,
exp: -1074
});
assert_eq!(compact::from_float(5e-324f64), ExtendedFloat80 {
mant: 1,
exp: -1074
});
assert_eq!(compact::from_float(1e-250f64), ExtendedFloat80 {
mant: 6448907850777164,
exp: -883
});
assert_eq!(compact::from_float(1e-150f64), ExtendedFloat80 {
mant: 7371020360979573,
exp: -551
});
assert_eq!(compact::from_float(1e-45f64), ExtendedFloat80 {
mant: 6427752177035961,
exp: -202
});
assert_eq!(compact::from_float(1e-40f64), ExtendedFloat80 {
mant: 4903985730770844,
exp: -185
});
assert_eq!(compact::from_float(2e-40f64), ExtendedFloat80 {
mant: 4903985730770844,
exp: -184
});
assert_eq!(compact::from_float(1e-20f64), ExtendedFloat80 {
mant: 6646139978924579,
exp: -119
});
assert_eq!(compact::from_float(2e-20f64), ExtendedFloat80 {
mant: 6646139978924579,
exp: -118
});
assert_eq!(compact::from_float(1.0f64), ExtendedFloat80 {
mant: 4503599627370496,
exp: -52
});
assert_eq!(compact::from_float(2.0f64), ExtendedFloat80 {
mant: 4503599627370496,
exp: -51
});
assert_eq!(compact::from_float(1e20f64), ExtendedFloat80 {
mant: 6103515625000000,
exp: 14
});
assert_eq!(compact::from_float(2e20f64), ExtendedFloat80 {
mant: 6103515625000000,
exp: 15
});
assert_eq!(compact::from_float(1e40f64), ExtendedFloat80 {
mant: 8271806125530277,
exp: 80
});
assert_eq!(compact::from_float(2e40f64), ExtendedFloat80 {
mant: 8271806125530277,
exp: 81
});
assert_eq!(compact::from_float(1e150f64), ExtendedFloat80 {
mant: 5503284107318959,
exp: 446
});
assert_eq!(compact::from_float(1e250f64), ExtendedFloat80 {
mant: 6290184345309700,
exp: 778
});
assert_eq!(compact::from_float(1.7976931348623157e308), ExtendedFloat80 {
mant: 9007199254740991,
exp: 971
});
}
fn check_mul(xmant: u64, xexp: i32, ymant: u64, yexp: i32, zmant: u64, zexp: i32) {
let x = ExtendedFloat80 {
mant: xmant,
exp: xexp,
};
let y = ExtendedFloat80 {
mant: ymant,
exp: yexp,
};
let z = ExtendedFloat80 {
mant: zmant,
exp: zexp,
};
let r = compact::mul(&x, &y);
assert_eq!(r, z);
}
#[test]
fn mul_test() {
// Normalized (64-bit mantissa)
check_mul(13164036458569648128, -213, 9223372036854775808, -62, 6582018229284824064, -211);
// Check both values need high bits set.
check_mul(1 << 32, -31, 1 << 32, -31, 1, 2);
check_mul(10 << 31, -31, 10 << 31, -31, 25, 2);
}
fn grisu<T: RawFloat>(f: T, expected: &str, k: i32) {
let mut buffer = [b'\x00'; 32];
let (count, real_k) = compact::grisu(f, &mut buffer);
let actual = unsafe { std::str::from_utf8_unchecked(&buffer[..count]) };
assert_eq!(actual, expected);
assert_eq!(k, real_k);
}
#[test]
fn grisu_test() {
// Useful test to ensure we don't have trailing zeros.
grisu(1.0f64, "1", 0);
grisu(0.1f64, "1", -1);
grisu(10.0f64, "1", 1);
grisu(100000000.0f64, "1", 8);
grisu(100001000.0f64, "100001", 3);
grisu(100111000.0f64, "100111", 3);
}
fn write_float<T: RawFloat, const FORMAT: u128>(f: T, options: &Options, expected: &str) {
let mut buffer = [b'\x00'; BUFFER_SIZE];
let count = compact::write_float::<_, FORMAT>(f, &mut buffer, options);
let actual = unsafe { std::str::from_utf8_unchecked(&buffer[..count]) };
assert_eq!(actual, expected);
}
#[test]
fn write_float_test() {
const OPTS1: Options = Options::builder().build_strict();
write_float::<_, DECIMAL>(0.0f64, &OPTS1, "0.0");
write_float::<_, DECIMAL>(1.0f64, &OPTS1, "1.0");
write_float::<_, DECIMAL>(1.5f64, &OPTS1, "1.5");
write_float::<_, DECIMAL>(1.2345678901234567890e0f64, &OPTS1, "1.2345678901234567");
write_float::<_, DECIMAL>(1.0e-17f64, &OPTS1, "1.0e-17");
write_float::<_, DECIMAL>(9.99999999999999e-16f64, &OPTS1, "9.99999999999999e-16");
write_float::<_, DECIMAL>(9.99999999999999e-15f64, &OPTS1, "9.99999999999999e-15");
write_float::<_, DECIMAL>(0.00999999999999999f64, &OPTS1, "0.00999999999999999");
write_float::<_, DECIMAL>(0.0999999999999999f64, &OPTS1, "0.0999999999999999");
write_float::<_, DECIMAL>(0.999999999999999f64, &OPTS1, "0.999999999999999");
write_float::<_, DECIMAL>(9.99999999999999f64, &OPTS1, "9.99999999999999");
write_float::<_, DECIMAL>(99.9999999999999f64, &OPTS1, "99.9999999999999");
write_float::<_, DECIMAL>(999.999999999999f64, &OPTS1, "999.999999999999");
write_float::<_, DECIMAL>(1000.0f64, &OPTS1, "1000.0");
write_float::<_, DECIMAL>(1.7976931348623157e308f64, &OPTS1, "1.7976931348623157e308");
write_float::<_, DECIMAL>(2.2250738585072014e-308f64, &OPTS1, "2.2250738585072014e-308");
const OPTS2: Options =
Options::builder().min_significant_digits(num::NonZeroUsize::new(50)).build_strict();
write_float::<_, DECIMAL>(
0.0f64,
&OPTS2,
"0.0000000000000000000000000000000000000000000000000",
);
write_float::<_, DECIMAL>(
1.0f64,
&OPTS2,
"1.0000000000000000000000000000000000000000000000000",
);
write_float::<_, DECIMAL>(
1.5f64,
&OPTS2,
"1.5000000000000000000000000000000000000000000000000",
);
write_float::<_, DECIMAL>(
1.2345678901234567890e0f64,
&OPTS2,
"1.2345678901234567000000000000000000000000000000000",
);
write_float::<_, DECIMAL>(
1.0e-17f64,
&OPTS2,
"1.0000000000000000000000000000000000000000000000000e-17",
);
write_float::<_, DECIMAL>(
9.99999999999999e-16f64,
&OPTS2,
"9.9999999999999900000000000000000000000000000000000e-16",
);
write_float::<_, DECIMAL>(
9.99999999999999e-15f64,
&OPTS2,
"9.9999999999999900000000000000000000000000000000000e-15",
);
write_float::<_, DECIMAL>(
0.00999999999999999f64,
&OPTS2,
"0.0099999999999999900000000000000000000000000000000000",
);
write_float::<_, DECIMAL>(
0.0999999999999999f64,
&OPTS2,
"0.099999999999999900000000000000000000000000000000000",
);
write_float::<_, DECIMAL>(
0.999999999999999f64,
&OPTS2,
"0.99999999999999900000000000000000000000000000000000",
);
write_float::<_, DECIMAL>(
9.99999999999999f64,
&OPTS2,
"9.9999999999999900000000000000000000000000000000000",
);
write_float::<_, DECIMAL>(
99.9999999999999f64,
&OPTS2,
"99.999999999999900000000000000000000000000000000000",
);
write_float::<_, DECIMAL>(
999.999999999999f64,
&OPTS2,
"999.99999999999900000000000000000000000000000000000",
);
write_float::<_, DECIMAL>(
1000.0f64,
&OPTS2,
"1000.0000000000000000000000000000000000000000000000",
);
write_float::<_, DECIMAL>(
1.7976931348623157e308f64,
&OPTS2,
"1.7976931348623157000000000000000000000000000000000e308",
);
write_float::<_, DECIMAL>(
2.2250738585072014e-308f64,
&OPTS2,
"2.2250738585072014000000000000000000000000000000000e-308",
);
const OPTS3: Options =
Options::builder().max_significant_digits(num::NonZeroUsize::new(5)).build_strict();
write_float::<_, DECIMAL>(0.0f64, &OPTS3, "0.0");
write_float::<_, DECIMAL>(1.0f64, &OPTS3, "1.0");
write_float::<_, DECIMAL>(1.5f64, &OPTS3, "1.5");
write_float::<_, DECIMAL>(1.2345678901234567890e0f64, &OPTS3, "1.2346");
write_float::<_, DECIMAL>(1.0e-17f64, &OPTS3, "1.0e-17");
write_float::<_, DECIMAL>(9.99999999999999e-16f64, &OPTS3, "1.0e-15");
write_float::<_, DECIMAL>(9.99999999999999e-15f64, &OPTS3, "1.0e-14");
write_float::<_, DECIMAL>(0.00999999999999999f64, &OPTS3, "0.01");
write_float::<_, DECIMAL>(0.0999999999999999f64, &OPTS3, "0.1");
write_float::<_, DECIMAL>(0.999999999999999f64, &OPTS3, "1.0");
write_float::<_, DECIMAL>(9.99999999999999f64, &OPTS3, "10.0");
write_float::<_, DECIMAL>(99.9999999999999f64, &OPTS3, "100.0");
write_float::<_, DECIMAL>(999.999999999999f64, &OPTS3, "1000.0");
write_float::<_, DECIMAL>(1000.0f64, &OPTS3, "1000.0");
write_float::<_, DECIMAL>(1.7976931348623157e308f64, &OPTS3, "1.7977e308");
write_float::<_, DECIMAL>(2.2250738585072014e-308f64, &OPTS3, "2.2251e-308");
const OPTS4: Options = Options::builder().trim_floats(true).build_strict();
write_float::<_, DECIMAL>(0.0f64, &OPTS4, "0");
write_float::<_, DECIMAL>(1.0f64, &OPTS4, "1");
write_float::<_, DECIMAL>(1.5f64, &OPTS4, "1.5");
write_float::<_, DECIMAL>(1.2345678901234567890e0f64, &OPTS4, "1.2345678901234567");
write_float::<_, DECIMAL>(1.0e-17f64, &OPTS4, "1e-17");
write_float::<_, DECIMAL>(9.99999999999999e-16f64, &OPTS4, "9.99999999999999e-16");
write_float::<_, DECIMAL>(9.99999999999999e-15f64, &OPTS4, "9.99999999999999e-15");
write_float::<_, DECIMAL>(0.00999999999999999f64, &OPTS4, "0.00999999999999999");
write_float::<_, DECIMAL>(0.0999999999999999f64, &OPTS4, "0.0999999999999999");
write_float::<_, DECIMAL>(0.999999999999999f64, &OPTS4, "0.999999999999999");
write_float::<_, DECIMAL>(9.99999999999999f64, &OPTS4, "9.99999999999999");
write_float::<_, DECIMAL>(99.9999999999999f64, &OPTS4, "99.9999999999999");
write_float::<_, DECIMAL>(999.999999999999f64, &OPTS4, "999.999999999999");
write_float::<_, DECIMAL>(1000.0f64, &OPTS4, "1000");
write_float::<_, DECIMAL>(1.7976931348623157e308f64, &OPTS4, "1.7976931348623157e308");
write_float::<_, DECIMAL>(2.2250738585072014e-308f64, &OPTS4, "2.2250738585072014e-308");
const OPTS5: Options = Options::builder()
.min_significant_digits(num::NonZeroUsize::new(50))
.trim_floats(true)
.build_strict();
write_float::<_, DECIMAL>(1.0e17f64, &OPTS5, "1e17");
write_float::<_, DECIMAL>(1.0e-17f64, &OPTS5, "1e-17");
write_float::<_, DECIMAL>(1000.0f64, &OPTS5, "1000");
write_float::<_, DECIMAL>(
9.99999999999999e16f64,
&OPTS5,
"9.9999999999999900000000000000000000000000000000000e16",
);
write_float::<_, DECIMAL>(
9.99999999999999e-16f64,
&OPTS5,
"9.9999999999999900000000000000000000000000000000000e-16",
);
const TRUNCATE: Options = Options::builder()
.max_significant_digits(num::NonZeroUsize::new(4))
.round_mode(RoundMode::Truncate)
.build_strict();
const ROUND: Options = Options::builder()
.max_significant_digits(num::NonZeroUsize::new(4))
.round_mode(RoundMode::Round)
.build_strict();
write_float::<_, DECIMAL>(1.2345678901234567890e0f64, &TRUNCATE, "1.234");
write_float::<_, DECIMAL>(1.2345678901234567890e0f64, &ROUND, "1.235");
write_float::<_, DECIMAL>(1.2345678901234567890e1f64, &TRUNCATE, "12.34");
write_float::<_, DECIMAL>(1.2345678901234567890e1f64, &ROUND, "12.35");
write_float::<_, DECIMAL>(1.2345678901234567890e2f64, &TRUNCATE, "123.4");
write_float::<_, DECIMAL>(1.2345678901234567890e2f64, &ROUND, "123.5");
write_float::<_, DECIMAL>(1.2345678901234567890e3f64, &TRUNCATE, "1234.0");
write_float::<_, DECIMAL>(1.2345678901234567890e3f64, &ROUND, "1235.0");
// Check min and max digits
const OPTS6: Options = Options::builder()
.min_significant_digits(num::NonZeroUsize::new(3))
.max_significant_digits(num::NonZeroUsize::new(4))
.round_mode(RoundMode::Truncate)
.build_strict();
write_float::<_, DECIMAL>(0.0f64, &OPTS6, "0.00");
write_float::<_, DECIMAL>(1.5f64, &OPTS6, "1.50");
write_float::<_, DECIMAL>(1.2345678901234567890e0f64, &OPTS6, "1.234");
}
// Test data for roundtrips.
const F32_DATA: [f32; 31] = [
0.,
0.1,
1.,
1.1,
12.,
12.1,
123.,
123.1,
1234.,
1234.1,
12345.,
12345.1,
123456.,
123456.1,
1234567.,
1234567.1,
12345678.,
12345678.1,
123456789.,
123456789.1,
123456789.12,
123456789.123,
123456789.1234,
123456789.12345,
1.2345678912345e8,
1.2345e+8,
1.2345e+11,
1.2345e+38,
1.2345e-8,
1.2345e-11,
1.2345e-38,
];
const F64_DATA: [f64; 33] = [
0.,
0.1,
1.,
1.1,
12.,
12.1,
123.,
123.1,
1234.,
1234.1,
12345.,
12345.1,
123456.,
123456.1,
1234567.,
1234567.1,
12345678.,
12345678.1,
123456789.,
123456789.1,
123456789.12,
123456789.123,
123456789.1234,
123456789.12345,
1.2345678912345e8,
1.2345e+8,
1.2345e+11,
1.2345e+38,
1.2345e+308,
1.2345e-8,
1.2345e-11,
1.2345e-38,
1.2345e-299,
];
#[test]
fn f32_test() {
const OPTIONS: Options = Options::builder().trim_floats(true).build_strict();
write_float::<_, DECIMAL>(0.0f32, &OPTIONS, "0");
write_float::<_, DECIMAL>(1.0f32, &OPTIONS, "1");
write_float::<_, DECIMAL>(10.0f32, &OPTIONS, "10");
write_float::<_, DECIMAL>(10.0f32, &OPTIONS, "10");
write_float::<_, DECIMAL>(1.2345678901234567890e0f32, &OPTIONS, "1.2345679");
write_float::<_, DECIMAL>(1.2345678901234567890e1f32, &OPTIONS, "12.345679");
write_float::<_, DECIMAL>(1.2345678901234567890e2f32, &OPTIONS, "123.45679");
write_float::<_, DECIMAL>(1.2345678901234567890e3f32, &OPTIONS, "1234.5679");
}
#[test]
fn f32_roundtrip_test() {
let mut buffer = [b'\x00'; BUFFER_SIZE];
const OPTIONS: Options = Options::builder().build_strict();
for &float in F32_DATA.iter() {
let count = compact::write_float::<_, DECIMAL>(float, &mut buffer, &OPTIONS);
let actual = unsafe { std::str::from_utf8_unchecked(&buffer[..count]) };
let roundtrip = actual.parse::<f32>();
assert_eq!(roundtrip, Ok(float));
}
}
fn write_float_scientific(digits: &mut [u8], k: i32, options: &Options, expected: &str) {
let mut buffer = [b'\x00'; BUFFER_SIZE];
let ndigits = digits.len();
let count =
compact::write_float_scientific::<DECIMAL>(&mut buffer, digits, ndigits, k, &options);
let actual = unsafe { std::str::from_utf8_unchecked(&buffer[..count]) };
assert_eq!(actual, expected);
}
macro_rules! mut_b {
($x:literal) => {
&mut $x.to_vec()
};
}
#[test]
fn write_float_scientific_test() {
const OPTS1: Options = Options::new();
write_float_scientific(mut_b!(b"1"), 0, &OPTS1, "1.0e0");
write_float_scientific(mut_b!(b"999999999999999"), -1, &OPTS1, "9.99999999999999e-1");
write_float_scientific(mut_b!(b"999999999999999"), 0, &OPTS1, "9.99999999999999e0");
write_float_scientific(mut_b!(b"999999999999999"), -2, &OPTS1, "9.99999999999999e-2");
write_float_scientific(mut_b!(b"17976931348623157"), 308, &OPTS1, "1.7976931348623157e308");
write_float_scientific(mut_b!(b"22250738585072014"), -308, &OPTS1, "2.2250738585072014e-308");
const OPTS2: Options = Options::builder().trim_floats(true).build_strict();
write_float_scientific(mut_b!(b"1"), 0, &OPTS2, "1e0");
write_float_scientific(mut_b!(b"999999999999999"), -1, &OPTS2, "9.99999999999999e-1");
write_float_scientific(mut_b!(b"999999999999999"), 0, &OPTS2, "9.99999999999999e0");
write_float_scientific(mut_b!(b"999999999999999"), -2, &OPTS2, "9.99999999999999e-2");
write_float_scientific(mut_b!(b"17976931348623157"), 308, &OPTS2, "1.7976931348623157e308");
write_float_scientific(mut_b!(b"22250738585072014"), -308, &OPTS2, "2.2250738585072014e-308");
}
fn write_float_positive_exponent(digits: &mut [u8], k: i32, options: &Options, expected: &str) {
let mut buffer = [b'\x00'; 512];
let ndigits = digits.len();
let count = compact::write_float_positive_exponent::<DECIMAL>(
&mut buffer,
digits,
ndigits,
k,
&options,
);
let actual = unsafe { std::str::from_utf8_unchecked(&buffer[..count]) };
assert_eq!(actual, expected);
}
#[test]
fn write_float_positive_exponent_test() {
const OPTS1: Options = Options::new();
write_float_positive_exponent(&mut [b'1'], 0, &OPTS1, "1.0");
write_float_positive_exponent(mut_b!(b"999999999999999"), 0, &OPTS1, "9.99999999999999");
write_float_positive_exponent(mut_b!(b"999999999999999"), 1, &OPTS1, "99.9999999999999");
write_float_positive_exponent(mut_b!(b"999999999999999"), 2, &OPTS1, "999.999999999999");
write_float_positive_exponent(mut_b!(b"17976931348623157"), 308, &OPTS1, "179769313486231570000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.0");
const OPTS2: Options = Options::builder().trim_floats(true).build_strict();
write_float_positive_exponent(&mut [b'1'], 0, &OPTS2, "1");
write_float_positive_exponent(mut_b!(b"999999999999999"), 0, &OPTS2, "9.99999999999999");
write_float_positive_exponent(mut_b!(b"999999999999999"), 1, &OPTS2, "99.9999999999999");
write_float_positive_exponent(mut_b!(b"999999999999999"), 2, &OPTS2, "999.999999999999");
write_float_positive_exponent(mut_b!(b"17976931348623157"), 308, &OPTS2, "179769313486231570000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
}
fn write_float_negative_exponent(digits: &mut [u8], k: i32, options: &Options, expected: &str) {
let mut buffer = [b'\x00'; 512];
let ndigits = digits.len();
let count = compact::write_float_negative_exponent::<DECIMAL>(
&mut buffer,
digits,
ndigits,
k,
&options,
);
let actual = unsafe { std::str::from_utf8_unchecked(&buffer[..count]) };
assert_eq!(actual, expected);
}
#[test]
fn write_float_negative_exponent_test() {
const OPTS1: Options = Options::new();
write_float_negative_exponent(&mut [b'1'], -1, &OPTS1, "0.1");
write_float_negative_exponent(mut_b!(b"999999999999999"), -3, &OPTS1, "0.00999999999999999");
write_float_negative_exponent(mut_b!(b"999999999999999"), -2, &OPTS1, "0.0999999999999999");
write_float_negative_exponent(mut_b!(b"999999999999999"), -1, &OPTS1, "0.999999999999999");
write_float_negative_exponent(mut_b!(b"22250738585072014"), -308, &OPTS1, "0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000022250738585072014");
const OPTS2: Options = Options::builder().trim_floats(true).build_strict();
write_float_negative_exponent(&mut [b'1'], -1, &OPTS2, "0.1");
write_float_negative_exponent(mut_b!(b"999999999999999"), -3, &OPTS2, "0.00999999999999999");
write_float_negative_exponent(mut_b!(b"999999999999999"), -2, &OPTS2, "0.0999999999999999");
write_float_negative_exponent(mut_b!(b"999999999999999"), -1, &OPTS2, "0.999999999999999");
write_float_negative_exponent(mut_b!(b"22250738585072014"), -308, &OPTS2, "0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000022250738585072014");
}
#[test]
fn f64_test() {
const OPTIONS: Options = Options::builder().trim_floats(true).build_strict();
write_float::<_, DECIMAL>(0.0f64, &OPTIONS, "0");
write_float::<_, DECIMAL>(1.0f64, &OPTIONS, "1");
write_float::<_, DECIMAL>(10.0f64, &OPTIONS, "10");
write_float::<_, DECIMAL>(10.0f64, &OPTIONS, "10");
write_float::<_, DECIMAL>(1.2345678901234567890e0f64, &OPTIONS, "1.2345678901234567");
write_float::<_, DECIMAL>(1.2345678901234567890e1f64, &OPTIONS, "12.345678901234567");
write_float::<_, DECIMAL>(1.2345678901234567890e2f64, &OPTIONS, "123.45678901234568");
write_float::<_, DECIMAL>(1.2345678901234567890e3f64, &OPTIONS, "1234.567890123457");
}
#[test]
fn f64_roundtrip_test() {
let mut buffer = [b'\x00'; BUFFER_SIZE];
const OPTIONS: Options = Options::builder().build_strict();
for &float in F64_DATA.iter() {
let count = compact::write_float::<_, DECIMAL>(float, &mut buffer, &OPTIONS);
let actual = unsafe { std::str::from_utf8_unchecked(&buffer[..count]) };
let roundtrip = actual.parse::<f64>();
assert_eq!(roundtrip, Ok(float));
}
}
