#![cfg(not(feature = "compact"))]
use core::num;
use lexical_util::constants::BUFFER_SIZE;
use lexical_util::format::NumberFormatBuilder;
use lexical_util::num::Float;
use lexical_write_float::algorithm::DragonboxFloat;
use lexical_write_float::float::{ExtendedFloat80, RawFloat};
use lexical_write_float::{algorithm, Options, RoundMode};
const DECIMAL: u128 = NumberFormatBuilder::decimal();
fn floor_shift(integer: u32, fraction: u64, shift: i32) -> i32 {
((integer << shift) | (fraction >> (64 - shift)) as u32) as i32
}
fn dragonbox_log5_2(q: i32) -> i32 {
let c = floor_shift(0, 0x6e40d1a4143dcb94, 20);
let s = floor_shift(0, 0, 20);
(q * c - s) >> 20
}
fn dragonbox_log10_2(q: i32) -> i32 {
let c = floor_shift(0, 0x4d104d427de7fbcc, 22);
let s = floor_shift(0, 0, 22);
(q * c - s) >> 22
}
fn dragonbox_log2_10(q: i32) -> i32 {
let c = floor_shift(3, 0x5269e12f346e2bf9, 19);
let s = floor_shift(0, 0, 19);
(q * c - s) >> 19
}
fn dragonbox_log5_2_sub_log5_3(q: i32) -> i32 {
let c = floor_shift(0, 0x6e40d1a4143dcb94, 20);
let s = floor_shift(0, 0xaebf47915d443b24, 20);
(q * c - s) >> 20
}
fn dragonbox_log10_2_sub_log10_4_div3(q: i32) -> i32 {
let c = floor_shift(0, 0x4d104d427de7fbcc, 22);
let s = floor_shift(0, 0x1ffbfc2bbc780375, 22);
(q * c - s) >> 22
}
#[test]
fn floor_log5_pow2_test() {
for q in -1492i32..=1492 {
let actual = algorithm::floor_log5_pow2(q);
let expected = dragonbox_log5_2(q);
assert_eq!(actual, expected);
}
}
#[test]
fn floor_log10_pow2_test() {
for q in -1700i32..=1700 {
let actual = algorithm::floor_log10_pow2(q);
let expected = dragonbox_log10_2(q);
assert_eq!(actual, expected);
}
}
#[test]
fn floor_log2_pow10_test() {
for q in -1233i32..=1233 {
let actual = algorithm::floor_log2_pow10(q);
let expected = dragonbox_log2_10(q);
assert_eq!(actual, expected);
}
}
#[test]
fn floor_log5_pow2_minus_log5_3_test() {
for q in -2427i32..=2427 {
let actual = algorithm::floor_log5_pow2_minus_log5_3(q);
let expected = dragonbox_log5_2_sub_log5_3(q);
assert_eq!(actual, expected);
}
}
#[test]
fn floor_log10_pow2_minus_log10_4_over_3_test() {
for q in -1700i32..=1700 {
let actual = algorithm::floor_log10_pow2_minus_log10_4_over_3(q);
let expected = dragonbox_log10_2_sub_log10_4_div3(q);
assert_eq!(actual, expected);
}
}
#[test]
fn issue84_test() {
let (hi, lo) =
algorithm::umul192_lower128(15966911296221875, 0xcccccccccccccccc, 0xcccccccccccccccd);
assert_eq!(hi, 0);
assert_eq!(lo, 3193382259244375);
}
#[test]
fn pow32_test() {
assert_eq!(algorithm::pow32(10, 1), 10);
assert_eq!(algorithm::pow32(10, 2), 100);
}
#[test]
fn pow64_test() {
assert_eq!(algorithm::pow64(10, 1), 10);
assert_eq!(algorithm::pow64(10, 2), 100);
}
#[test]
fn count_factors_test() {
assert_eq!(algorithm::count_factors(5, 25), 2);
assert_eq!(algorithm::count_factors(5, 30), 1);
assert_eq!(algorithm::count_factors(5, 125), 3);
assert_eq!(algorithm::count_factors(5, 126), 0);
}
#[test]
fn floor_log2_test() {
assert_eq!(algorithm::floor_log2(25), 4);
assert_eq!(algorithm::floor_log2(30), 4);
assert_eq!(algorithm::floor_log2(125), 6);
assert_eq!(algorithm::floor_log2(126), 6);
assert_eq!(algorithm::floor_log2(128), 7);
}
fn to_decimal_f32(float: f32) -> (u64, i32) {
let fp = algorithm::to_decimal(float);
(fp.mant, fp.exp)
}
fn to_decimal_f64(float: f64) -> (u64, i32) {
let fp = algorithm::to_decimal(float);
(fp.mant, fp.exp)
}
#[test]
fn to_decimal_test() {
assert_eq!(to_decimal_f32(0.0), (0, 0));
assert_eq!(to_decimal_f32(0.5), (5, -1));
assert_eq!(to_decimal_f32(1.0), (1, 0));
assert_eq!(to_decimal_f32(1.5), (15, -1));
assert_eq!(to_decimal_f32(1.23456), (123456, -5));
assert_eq!(to_decimal_f32(2.3786281e+38), (23786281, 31));
assert_eq!(to_decimal_f32(2147481600.0), (21474816, 2));
assert_eq!(to_decimal_f32(2147483600.0), (21474836, 2));
assert_eq!(to_decimal_f32(2762159900.0), (27621599, 2));
assert_eq!(to_decimal_f32(77371252000000000000000000.0), (77371252, 18));
assert_eq!(to_decimal_f64(0.0), (0, 0));
assert_eq!(to_decimal_f64(0.5), (5, -1));
assert_eq!(to_decimal_f64(1.0), (1, 0));
assert_eq!(to_decimal_f64(1.5), (15, -1));
assert_eq!(to_decimal_f64(1.23456), (123456, -5));
assert_eq!(to_decimal_f64(2.2250738585072014e-308), (22250738585072014, -324));
assert_eq!(to_decimal_f64(1.7976931348623157e+308), (17976931348623157, 292));
}
fn compute_nearest_shorter(float: f64) -> (u64, i32) {
let fp = algorithm::compute_nearest_shorter(float);
(fp.mant, fp.exp)
}
#[test]
fn compute_nearest_shorter_test() {
assert_eq!(compute_nearest_shorter(0.5), (5, -1));
assert_eq!(compute_nearest_shorter(1.0), (1, 0));
assert_eq!(compute_nearest_shorter(2.0), (2, 0));
}
fn compute_nearest_normal(float: f64) -> (u64, i32) {
let fp = algorithm::compute_nearest_normal(float);
(fp.mant, fp.exp)
}
#[test]
fn compute_nearest_normal_test() {
assert_eq!(compute_nearest_normal(1.23456), (123456, -5));
assert_eq!(compute_nearest_normal(13.9999999999999982236431606), (13999999999999998, -15));
}
fn compute_left_closed_directed(float: f64) -> (u64, i32) {
let fp = algorithm::compute_left_closed_directed(float);
(fp.mant, fp.exp)
}
#[test]
fn compute_left_closed_directed_test() {
assert_eq!(compute_left_closed_directed(1.23456), (12345600000000002, -16));
assert_eq!(
compute_left_closed_directed(13.9999999999999982236431606),
(13999999999999999, -15)
);
}
fn compute_right_closed_directed(float: f64) -> (u64, i32) {
// Assume we do not have a shorter case.
let bits = float.to_bits();
let mantissa_bits = bits & f64::MANTISSA_MASK;
assert!(mantissa_bits != 0);
let fp = algorithm::compute_right_closed_directed(float, false);
(fp.mant, fp.exp)
}
#[test]
fn compute_right_closed_directed_test() {
assert_eq!(compute_right_closed_directed(1.23456), (123456, -5));
assert_eq!(
compute_right_closed_directed(13.9999999999999982236431606),
(13999999999999982, -15)
);
}
fn write_digits_f32(buffer: &mut [u8], value: u64, expected: &str) {
let count = f32::write_digits(buffer, value);
let actual = unsafe { std::str::from_utf8_unchecked(&buffer[..count]) };
assert_eq!(actual, expected);
}
#[test]
fn write_digits_f32_test() {
let mut buffer = [b'\x00'; BUFFER_SIZE];
write_digits_f32(&mut buffer, 0, "0");
write_digits_f32(&mut buffer, 1, "1");
write_digits_f32(&mut buffer, 11, "11");
write_digits_f32(&mut buffer, 23, "23");
write_digits_f32(&mut buffer, 23786281, "23786281");
write_digits_f32(&mut buffer, 4294967295, "4294967295");
}
fn write_digits_f64(buffer: &mut [u8], value: u64, expected: &str) {
let count = f64::write_digits(buffer, value);
let actual = unsafe { std::str::from_utf8_unchecked(&buffer[..count]) };
assert_eq!(actual, expected);
}
#[test]
fn write_digits_f64_test() {
let mut buffer = [b'\x00'; BUFFER_SIZE];
write_digits_f64(&mut buffer, 0, "0");
write_digits_f64(&mut buffer, 1, "1");
write_digits_f64(&mut buffer, 11, "11");
write_digits_f64(&mut buffer, 23, "23");
write_digits_f64(&mut buffer, 4294967295, "4294967295");
write_digits_f64(&mut buffer, 4294967296, "4294967296");
}
fn write_float_scientific(mant: u64, exp: i32, options: &Options, expected: &str) {
let mut buffer = [b'\x00'; BUFFER_SIZE];
let fp = ExtendedFloat80 {
mant,
exp,
};
let digit_count = f64::digit_count(fp.mant);
let sci_exp = fp.exp + digit_count as i32 - 1;
let count =
algorithm::write_float_scientific::<f64, DECIMAL>(&mut buffer, fp, sci_exp, &options);
let actual = unsafe { std::str::from_utf8_unchecked(&buffer[..count]) };
assert_eq!(actual, expected);
}
#[test]
fn write_float_scientific_test() {
const OPTS1: Options = Options::new();
write_float_scientific(1, 0, &OPTS1, "1.0e0");
write_float_scientific(1, 3, &OPTS1, "1.0e3");
write_float_scientific(1, -12, &OPTS1, "1.0e-12");
write_float_scientific(999999999999999, -15, &OPTS1, "9.99999999999999e-1");
write_float_scientific(999999999999999, -14, &OPTS1, "9.99999999999999e0");
write_float_scientific(999999999999999, -16, &OPTS1, "9.99999999999999e-2");
write_float_scientific(17976931348623157, 292, &OPTS1, "1.7976931348623157e308");
write_float_scientific(22250738585072014, -324, &OPTS1, "2.2250738585072014e-308");
const OPTS2: Options =
Options::builder().min_significant_digits(num::NonZeroUsize::new(50)).build_strict();
write_float_scientific(1, 0, &OPTS2, "1.0000000000000000000000000000000000000000000000000e0");
write_float_scientific(1, 3, &OPTS2, "1.0000000000000000000000000000000000000000000000000e3");
write_float_scientific(
1,
-12,
&OPTS2,
"1.0000000000000000000000000000000000000000000000000e-12",
);
write_float_scientific(
999999999999999,
-15,
&OPTS2,
"9.9999999999999900000000000000000000000000000000000e-1",
);
write_float_scientific(
999999999999999,
-14,
&OPTS2,
"9.9999999999999900000000000000000000000000000000000e0",
);
write_float_scientific(
999999999999999,
-16,
&OPTS2,
"9.9999999999999900000000000000000000000000000000000e-2",
);
write_float_scientific(
17976931348623157,
292,
&OPTS2,
"1.7976931348623157000000000000000000000000000000000e308",
);
write_float_scientific(
22250738585072014,
-324,
&OPTS2,
"2.2250738585072014000000000000000000000000000000000e-308",
);
const OPTS3: Options =
Options::builder().max_significant_digits(num::NonZeroUsize::new(5)).build_strict();
write_float_scientific(1, 0, &OPTS3, "1.0e0");
write_float_scientific(1, 3, &OPTS3, "1.0e3");
write_float_scientific(1, -12, &OPTS3, "1.0e-12");
write_float_scientific(999999999999999, -15, &OPTS3, "1.0e0");
write_float_scientific(999999999999999, -14, &OPTS3, "1.0e1");
write_float_scientific(999999999999999, -16, &OPTS3, "1.0e-1");
write_float_scientific(17976931348623157, 292, &OPTS3, "1.7977e308");
write_float_scientific(22250738585072014, -324, &OPTS3, "2.2251e-308");
const OPTS4: Options = Options::builder().trim_floats(true).build_strict();
write_float_scientific(1, 0, &OPTS4, "1e0");
write_float_scientific(1, 3, &OPTS4, "1e3");
write_float_scientific(1, -12, &OPTS4, "1e-12");
write_float_scientific(999999999999999, -15, &OPTS4, "9.99999999999999e-1");
write_float_scientific(999999999999999, -14, &OPTS4, "9.99999999999999e0");
write_float_scientific(999999999999999, -16, &OPTS4, "9.99999999999999e-2");
write_float_scientific(17976931348623157, 292, &OPTS4, "1.7976931348623157e308");
write_float_scientific(22250738585072014, -324, &OPTS4, "2.2250738585072014e-308");
}
fn write_float_positive_exponent(mant: u64, exp: i32, options: &Options, expected: &str) {
let mut buffer = [b'\x00'; 512];
let fp = ExtendedFloat80 {
mant,
exp,
};
let digit_count = f64::digit_count(fp.mant);
let sci_exp = fp.exp + digit_count as i32 - 1;
let count = algorithm::write_float_positive_exponent::<f64, DECIMAL>(
&mut buffer,
fp,
sci_exp,
&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(1, 0, &OPTS1, "1.0");
write_float_positive_exponent(1, 3, &OPTS1, "1000.0");
write_float_positive_exponent(1, 12, &OPTS1, "1000000000000.0");
write_float_positive_exponent(999999999999999, -14, &OPTS1, "9.99999999999999");
write_float_positive_exponent(999999999999999, -13, &OPTS1, "99.9999999999999");
write_float_positive_exponent(999999999999999, -12, &OPTS1, "999.999999999999");
write_float_positive_exponent(17976931348623157, 292, &OPTS1, "179769313486231570000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.0");
const OPTS2: Options =
Options::builder().min_significant_digits(num::NonZeroUsize::new(50)).build_strict();
write_float_positive_exponent(
1,
0,
&OPTS2,
"1.0000000000000000000000000000000000000000000000000",
);
write_float_positive_exponent(
1,
3,
&OPTS2,
"1000.0000000000000000000000000000000000000000000000",
);
write_float_positive_exponent(
1,
12,
&OPTS2,
"1000000000000.0000000000000000000000000000000000000",
);
write_float_positive_exponent(
999999999999999,
-14,
&OPTS2,
"9.9999999999999900000000000000000000000000000000000",
);
write_float_positive_exponent(
999999999999999,
-13,
&OPTS2,
"99.999999999999900000000000000000000000000000000000",
);
write_float_positive_exponent(
999999999999999,
-12,
&OPTS2,
"999.99999999999900000000000000000000000000000000000",
);
write_float_positive_exponent(17976931348623157, 292, &OPTS2, "179769313486231570000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.0");
const OPTS3: Options =
Options::builder().max_significant_digits(num::NonZeroUsize::new(5)).build_strict();
write_float_positive_exponent(1, 0, &OPTS3, "1.0");
write_float_positive_exponent(1, 3, &OPTS3, "1000.0");
write_float_positive_exponent(1, 12, &OPTS3, "1000000000000.0");
write_float_positive_exponent(999999999999999, -14, &OPTS3, "10.0");
write_float_positive_exponent(999999999999999, -13, &OPTS3, "100.0");
write_float_positive_exponent(999999999999999, -12, &OPTS3, "1000.0");
write_float_positive_exponent(17976931348623157, 292, &OPTS3, "179770000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.0");
const OPTS4: Options = Options::builder().trim_floats(true).build_strict();
write_float_positive_exponent(1, 0, &OPTS4, "1");
write_float_positive_exponent(1, 3, &OPTS4, "1000");
write_float_positive_exponent(1, 12, &OPTS4, "1000000000000");
write_float_positive_exponent(999999999999999, -14, &OPTS4, "9.99999999999999");
write_float_positive_exponent(999999999999999, -13, &OPTS4, "99.9999999999999");
write_float_positive_exponent(999999999999999, -12, &OPTS4, "999.999999999999");
write_float_positive_exponent(17976931348623157, 292, &OPTS4, "179769313486231570000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
}
fn write_float_negative_exponent(mant: u64, exp: i32, options: &Options, expected: &str) {
let mut buffer = [b'\x00'; 512];
let fp = ExtendedFloat80 {
mant,
exp,
};
let digit_count = f64::digit_count(fp.mant);
let sci_exp = fp.exp + digit_count as i32 - 1;
let count = algorithm::write_float_negative_exponent::<f64, DECIMAL>(
&mut buffer,
fp,
sci_exp,
&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(1, -1, &OPTS1, "0.1");
write_float_negative_exponent(1, -3, &OPTS1, "0.001");
write_float_negative_exponent(1, -12, &OPTS1, "0.000000000001");
write_float_negative_exponent(999999999999999, -17, &OPTS1, "0.00999999999999999");
write_float_negative_exponent(999999999999999, -16, &OPTS1, "0.0999999999999999");
write_float_negative_exponent(999999999999999, -15, &OPTS1, "0.999999999999999");
write_float_negative_exponent(22250738585072014, -324, &OPTS1, "0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000022250738585072014");
const OPTS2: Options =
Options::builder().min_significant_digits(num::NonZeroUsize::new(50)).build_strict();
write_float_negative_exponent(
1,
-1,
&OPTS2,
"0.10000000000000000000000000000000000000000000000000",
);
write_float_negative_exponent(
1,
-3,
&OPTS2,
"0.0010000000000000000000000000000000000000000000000000",
);
write_float_negative_exponent(
1,
-12,
&OPTS2,
"0.0000000000010000000000000000000000000000000000000000000000000",
);
write_float_negative_exponent(
999999999999999,
-17,
&OPTS2,
"0.0099999999999999900000000000000000000000000000000000",
);
write_float_negative_exponent(
999999999999999,
-16,
&OPTS2,
"0.099999999999999900000000000000000000000000000000000",
);
write_float_negative_exponent(
999999999999999,
-15,
&OPTS2,
"0.99999999999999900000000000000000000000000000000000",
);
write_float_negative_exponent(22250738585072014, -324, &OPTS2, "0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000022250738585072014000000000000000000000000000000000");
const OPTS3: Options =
Options::builder().max_significant_digits(num::NonZeroUsize::new(5)).build_strict();
write_float_negative_exponent(1, -1, &OPTS3, "0.1");
write_float_negative_exponent(1, -3, &OPTS3, "0.001");
write_float_negative_exponent(1, -12, &OPTS3, "0.000000000001");
write_float_negative_exponent(999999999999999, -17, &OPTS3, "0.01");
write_float_negative_exponent(999999999999999, -16, &OPTS3, "0.1");
write_float_negative_exponent(999999999999999, -15, &OPTS3, "1.0");
write_float_negative_exponent(22250738585072014, -324, &OPTS3, "0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000022251");
const OPTS4: Options = Options::builder().trim_floats(true).build_strict();
write_float_negative_exponent(1, -1, &OPTS4, "0.1");
write_float_negative_exponent(1, -3, &OPTS4, "0.001");
write_float_negative_exponent(1, -12, &OPTS4, "0.000000000001");
write_float_negative_exponent(999999999999999, -17, &OPTS4, "0.00999999999999999");
write_float_negative_exponent(999999999999999, -16, &OPTS4, "0.0999999999999999");
write_float_negative_exponent(999999999999999, -15, &OPTS4, "0.999999999999999");
write_float_negative_exponent(22250738585072014, -324, &OPTS4, "0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000022250738585072014");
}
// 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,
];
fn write_float<T: RawFloat, const FORMAT: u128>(f: T, options: &Options, expected: &str) {
let mut buffer = [b'\x00'; BUFFER_SIZE];
let count = algorithm::write_float::<_, FORMAT>(f, &mut buffer, options);
let actual = unsafe { std::str::from_utf8_unchecked(&buffer[..count]) };
assert_eq!(actual, expected);
}
#[test]
fn f32_test() {
const OPTS1: Options = Options::builder().trim_floats(true).build_strict();
write_float::<_, DECIMAL>(0.0f32, &OPTS1, "0");
write_float::<_, DECIMAL>(1.0f32, &OPTS1, "1");
write_float::<_, DECIMAL>(10.0f32, &OPTS1, "10");
write_float::<_, DECIMAL>(10.0f32, &OPTS1, "10");
write_float::<_, DECIMAL>(1.2345678901234567890e0f32, &OPTS1, "1.2345679");
write_float::<_, DECIMAL>(1.2345678901234567890e1f32, &OPTS1, "12.345679");
write_float::<_, DECIMAL>(1.2345678901234567890e2f32, &OPTS1, "123.45679");
write_float::<_, DECIMAL>(1.2345678901234567890e3f32, &OPTS1, "1234.5679");
write_float::<_, DECIMAL>(2.3786281e+38f32, &OPTS1, "2.3786281e38");
const OPTS2: Options = Options::new();
write_float::<_, DECIMAL>(2.3786281e+38f32, &OPTS2, "2.3786281e38");
}
#[test]
fn f32_errors_test() {
// Errors discovered via quickcheck.
const OPTIONS: Options = Options::new();
write_float::<_, DECIMAL>(0.0f32, &OPTIONS, "0.0");
write_float::<_, DECIMAL>(1073741800.0f32, &OPTIONS, "1073741800.0");
write_float::<_, DECIMAL>(1610612700.0f32, &OPTIONS, "1610612700.0");
write_float::<_, DECIMAL>(1879048200.0f32, &OPTIONS, "1879048200.0");
write_float::<_, DECIMAL>(2013265900.0f32, &OPTIONS, "2013265900.0");
write_float::<_, DECIMAL>(2080374800.0f32, &OPTIONS, "2080374800.0");
write_float::<_, DECIMAL>(2113929200.0f32, &OPTIONS, "2113929200.0");
write_float::<_, DECIMAL>(2130706400.0f32, &OPTIONS, "2130706400.0");
write_float::<_, DECIMAL>(2139095000.0f32, &OPTIONS, "2139095000.0");
write_float::<_, DECIMAL>(2143289300.0f32, &OPTIONS, "2143289300.0");
write_float::<_, DECIMAL>(2145386500.0f32, &OPTIONS, "2145386500.0");
write_float::<_, DECIMAL>(2146435100.0f32, &OPTIONS, "2146435100.0");
write_float::<_, DECIMAL>(2146959400.0f32, &OPTIONS, "2146959400.0");
write_float::<_, DECIMAL>(2147221500.0f32, &OPTIONS, "2147221500.0");
write_float::<_, DECIMAL>(2147352600.0f32, &OPTIONS, "2147352600.0");
write_float::<_, DECIMAL>(2147418100.0f32, &OPTIONS, "2147418100.0");
write_float::<_, DECIMAL>(2147450900.0f32, &OPTIONS, "2147450900.0");
write_float::<_, DECIMAL>(2147467300.0f32, &OPTIONS, "2147467300.0");
write_float::<_, DECIMAL>(2147475500.0f32, &OPTIONS, "2147475500.0");
write_float::<_, DECIMAL>(2147479600.0f32, &OPTIONS, "2147479600.0");
write_float::<_, DECIMAL>(2147481600.0f32, &OPTIONS, "2147481600.0");
write_float::<_, DECIMAL>(2147482600.0f32, &OPTIONS, "2147482600.0");
write_float::<_, DECIMAL>(2147483100.0f32, &OPTIONS, "2147483100.0");
write_float::<_, DECIMAL>(2147483400.0f32, &OPTIONS, "2147483400.0");
write_float::<_, DECIMAL>(2147483500.0f32, &OPTIONS, "2147483500.0");
write_float::<_, DECIMAL>(2147483600.0f32, &OPTIONS, "2147483600.0");
}
#[test]
fn f32_roundtrip_test() {
let mut buffer: [u8; BUFFER_SIZE] = [b'\x00'; BUFFER_SIZE];
const OPTIONS: Options = Options::builder().build_strict();
for &float in F32_DATA.iter() {
let count = algorithm::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));
}
}
#[test]
fn f64_test() {
const TRIM: Options = Options::builder().trim_floats(true).build_strict();
write_float::<_, DECIMAL>(0.0f64, &TRIM, "0");
write_float::<_, DECIMAL>(1.0f64, &TRIM, "1");
write_float::<_, DECIMAL>(10.0f64, &TRIM, "10");
write_float::<_, DECIMAL>(10.0f64, &TRIM, "10");
write_float::<_, DECIMAL>(1.2345678901234567890e0f64, &TRIM, "1.2345678901234567");
write_float::<_, DECIMAL>(1.2345678901234567890e1f64, &TRIM, "12.345678901234567");
write_float::<_, DECIMAL>(1.2345678901234567890e2f64, &TRIM, "123.45678901234568");
write_float::<_, DECIMAL>(1.2345678901234567890e3f64, &TRIM, "1234.567890123457");
write_float::<_, DECIMAL>(1.5f64, &TRIM, "1.5");
write_float::<_, DECIMAL>(1.0e-17f64, &TRIM, "1e-17");
write_float::<_, DECIMAL>(9.99999999999999e-16f64, &TRIM, "9.99999999999999e-16");
write_float::<_, DECIMAL>(9.99999999999999e-15f64, &TRIM, "9.99999999999999e-15");
write_float::<_, DECIMAL>(0.00999999999999999f64, &TRIM, "0.00999999999999999");
write_float::<_, DECIMAL>(0.0999999999999999f64, &TRIM, "0.0999999999999999");
write_float::<_, DECIMAL>(0.999999999999999f64, &TRIM, "0.999999999999999");
write_float::<_, DECIMAL>(9.99999999999999f64, &TRIM, "9.99999999999999");
write_float::<_, DECIMAL>(99.9999999999999f64, &TRIM, "99.9999999999999");
write_float::<_, DECIMAL>(999.999999999999f64, &TRIM, "999.999999999999");
write_float::<_, DECIMAL>(1000.0f64, &TRIM, "1000");
write_float::<_, DECIMAL>(1.7976931348623157e308f64, &TRIM, "1.7976931348623157e308");
write_float::<_, DECIMAL>(2.2250738585072014e-308f64, &TRIM, "2.2250738585072014e-308");
const MIN_DIGITS: Options = Options::builder()
.min_significant_digits(num::NonZeroUsize::new(50))
.trim_floats(true)
.build_strict();
write_float::<_, DECIMAL>(1.0e17f64, &MIN_DIGITS, "1e17");
write_float::<_, DECIMAL>(1.0e-17f64, &MIN_DIGITS, "1e-17");
write_float::<_, DECIMAL>(1000.0f64, &MIN_DIGITS, "1000");
write_float::<_, DECIMAL>(
9.99999999999999e16f64,
&MIN_DIGITS,
"9.9999999999999900000000000000000000000000000000000e16",
);
write_float::<_, DECIMAL>(
9.99999999999999e-16f64,
&MIN_DIGITS,
"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");
}
#[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 = algorithm::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));
}
}
#[test]
fn is_endpoint_test() {
assert_eq!(algorithm::is_endpoint(5, 2, 10), true);
assert_eq!(algorithm::is_endpoint(5, 6, 10), false);
}
#[test]
fn is_right_endpoint_test() {
assert_eq!(algorithm::is_right_endpoint::<f64>(1), true);
assert_eq!(algorithm::is_right_endpoint::<f64>(2), true);
assert_eq!(algorithm::is_right_endpoint::<f64>(3), true);
assert_eq!(algorithm::is_right_endpoint::<f64>(4), false);
}
#[test]
fn is_left_endpoint_test() {
assert_eq!(algorithm::is_left_endpoint::<f64>(1), false);
assert_eq!(algorithm::is_left_endpoint::<f64>(2), true);
assert_eq!(algorithm::is_left_endpoint::<f64>(3), true);
assert_eq!(algorithm::is_left_endpoint::<f64>(4), false);
}
