Spracherkennung für: .rs vermutete Sprache: Unknown {[0] [0] [0]} [Methode: Schwerpunktbildung, einfache Gewichte, sechs Dimensionen]
// Translated from C to Rust. The original C code can be found at
//
https://github.com/ulfjack/ryu and carries the following license:
//
// Copyright
2018 Ulf Adams
//
// The contents of this file may be used under the terms of the Apache License,
// Version
2.
0.
//
// (See accompanying file LICENSE-Apache or copy at
//
http://www.apache.org/licenses/LICENSE-2.
0)
//
// Alternatively, the contents of this file may be used under the terms of
// the Boost Software License, Version
1.
0.
// (See accompanying file LICENSE-Boost or copy at
//
https://www.boost.org/LICENSE_1_0.txt)
//
// Unless required by applicable law or agreed to in writing, this software
// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.
#![allow(
clippy::approx_constant,
clippy::cast_lossless,
clippy::float_cmp,
clippy::int_plus_one,
clippy::non_ascii_literal,
clippy::unreadable_literal,
clippy::unseparated_literal_suffix
)]
#[macro_use]
mod macros;
use std::f64;
fn pretty(f: f64) -> String {
ryu::Buffer::new().format(f).to_owned()
}
fn ieee_parts_to_double(sign: bool, ieee_exponent: u32, ieee_mantissa: u64) -> f64 {
assert!(ieee_exponent <=
2047);
assert!(ieee_mantissa <= (
1u64 <<
53) -
1);
f64::from_bits(((sign as u64) <<
63) | ((ieee_exponent as u64) <<
52) | ieee_mantissa)
}
#[test]
fn test_ryu() {
check!(
0.
3);
check!(
1234000000000000.
0);
check!(
1.
234e16);
check!(
2.
71828);
check!(
1.
1e128);
check!(
1.
1e-
64);
check!(
2.
718281828459045);
check!(
5e-
324);
check!(
1.
7976931348623157e308);
}
#[test]
fn test_random() {
let n = if cfg!(miri) {
100 } else {
1000000 };
let mut buffer = ryu::Buffer::new();
for _ in
0..n {
let f: f64 = rand::random();
assert_eq!(f, buffer.format_finite(f).parse().unwrap());
}
}
#[test]
#[cfg_attr(miri, ignore)]
fn test_non_finite() {
for i in
0u64..
1 <<
23 {
let f = f64::from_bits((((
1 <<
11) -
1) <<
52) + (i <<
29));
assert!(!f.is_finite(), "f={}", f);
ryu::Buffer::new().format_finite(f);
}
}
#[test]
fn test_basic() {
check!(
0.
0);
check!(-
0.
0);
check!(
1.
0);
check!(-
1.
0);
assert_eq!(pretty(f64::NAN), "NaN");
assert_eq!(pretty(f64::INFINITY), "inf");
assert_eq!(pretty(f64::NEG_INFINITY), "-inf");
}
#[test]
fn test_switch_to_subnormal() {
check!(
2.
2250738585072014e-
308);
}
#[test]
fn test_min_and_max() {
assert_eq!(f64::from_bits(
0x7fefffffffffffff),
1.
7976931348623157e308);
check!(
1.
7976931348623157e308);
assert_eq!(f64::from_bits(
1),
5e-
324);
check!(
5e-
324);
}
#[test]
fn test_lots_of_trailing_zeros() {
check!(
2.
9802322387695312e-
8);
}
#[test]
fn test_regression() {
check!(-
2.
109808898695963e16);
check!(
4.
940656e-
318);
check!(
1.
18575755e-
316);
check!(
2.
989102097996e-
312);
check!(
9060801153433600.
0);
check!(
4.
708356024711512e18);
check!(
9.
409340012568248e18);
check!(
1.
2345678);
}
#[test]
fn test_looks_like_pow5() {
// These numbers have a mantissa that is a multiple of the largest power of
//
5 that fits, and an exponent that causes the computation for q to result
// in
22, which is a corner case for Ryū.
assert_eq!(f64::from_bits(
0x4830F0CF064DD592),
5.
764607523034235e39);
check!(
5.
764607523034235e39);
assert_eq!(f64::from_bits(
0x4840F0CF064DD592),
1.
152921504606847e40);
check!(
1.
152921504606847e40);
assert_eq!(f64::from_bits(
0x4850F0CF064DD592),
2.
305843009213694e40);
check!(
2.
305843009213694e40);
}
#[test]
fn test_output_length() {
check!(
1.
0); // already tested in Basic
check!(
1.
2);
check!(
1.
23);
check!(
1.
234);
check!(
1.
2345);
check!(
1.
23456);
check!(
1.
234567);
check!(
1.
2345678); // already tested in Regression
check!(
1.
23456789);
check!(
1.
234567895); //
1.
234567890 would be trimmed
check!(
1.
2345678901);
check!(
1.
23456789012);
check!(
1.
234567890123);
check!(
1.
2345678901234);
check!(
1.
23456789012345);
check!(
1.
234567890123456);
check!(
1.
2345678901234567);
// Test
32-bit chunking
check!(
4.
294967294); //
2^
32 -
2
check!(
4.
294967295); //
2^
32 -
1
check!(
4.
294967296); //
2^
32
check!(
4.
294967297); //
2^
32 +
1
check!(
4.
294967298); //
2^
32 +
2
}
// Test min, max shift values in shiftright128
#[test]
fn test_min_max_shift() {
let max_mantissa = (
1u64 <<
53) -
1;
//
32-bit opt-size=
0:
49 <= dist <=
50
//
32-bit opt-size=
1:
30 <= dist <=
50
//
64-bit opt-size=
0:
50 <= dist <=
50
//
64-bit opt-size=
1:
30 <= dist <=
50
assert_eq!(
1.
7800590868057611E-
307, ieee_parts_to_double(false,
4,
0));
check!(
1.
7800590868057611e-
307);
//
32-bit opt-size=
0:
49 <= dist <=
49
//
32-bit opt-size=
1:
28 <= dist <=
49
//
64-bit opt-size=
0:
50 <= dist <=
50
//
64-bit opt-size=
1:
28 <= dist <=
50
assert_eq!(
2.
8480945388892175E-
306,
ieee_parts_to_double(false,
6, max_mantissa)
);
check!(
2.
8480945388892175e-
306);
//
32-bit opt-size=
0:
52 <= dist <=
53
//
32-bit opt-size=
1:
2 <= dist <=
53
//
64-bit opt-size=
0:
53 <= dist <=
53
//
64-bit opt-size=
1:
2 <= dist <=
53
assert_eq!(
2.
446494580089078E-
296, ieee_parts_to_double(false,
41,
0));
check!(
2.
446494580089078e-
296);
//
32-bit opt-size=
0:
52 <= dist <=
52
//
32-bit opt-size=
1:
2 <= dist <=
52
//
64-bit opt-size=
0:
53 <= dist <=
53
//
64-bit opt-size=
1:
2 <= dist <=
53
assert_eq!(
4.
8929891601781557E-
296,
ieee_parts_to_double(false,
40, max_mantissa)
);
check!(
4.
8929891601781557e-
296);
//
32-bit opt-size=
0:
57 <= dist <=
58
//
32-bit opt-size=
1:
57 <= dist <=
58
//
64-bit opt-size=
0:
58 <= dist <=
58
//
64-bit opt-size=
1:
58 <= dist <=
58
assert_eq!(
1.
8014398509481984E16, ieee_parts_to_double(false,
1077,
0));
check!(
1.
8014398509481984e16);
//
32-bit opt-size=
0:
57 <= dist <=
57
//
32-bit opt-size=
1:
57 <= dist <=
57
//
64-bit opt-size=
0:
58 <= dist <=
58
//
64-bit opt-size=
1:
58 <= dist <=
58
assert_eq!(
3.
6028797018963964E16,
ieee_parts_to_double(false,
1076, max_mantissa)
);
check!(
3.
6028797018963964e16);
//
32-bit opt-size=
0:
51 <= dist <=
52
//
32-bit opt-size=
1:
51 <= dist <=
59
//
64-bit opt-size=
0:
52 <= dist <=
52
//
64-bit opt-size=
1:
52 <= dist <=
59
assert_eq!(
2.
900835519859558E-
216, ieee_parts_to_double(false,
307,
0));
check!(
2.
900835519859558e-
216);
//
32-bit opt-size=
0:
51 <= dist <=
51
//
32-bit opt-size=
1:
51 <= dist <=
59
//
64-bit opt-size=
0:
52 <= dist <=
52
//
64-bit opt-size=
1:
52 <= dist <=
59
assert_eq!(
5.
801671039719115E-
216,
ieee_parts_to_double(false,
306, max_mantissa)
);
check!(
5.
801671039719115e-
216);
//
https://github.com/ulfjack/ryu/commit/19e44d16d80236f5de25800f56d82606d1be00b9
#commitcomment-30146483
// 32-bit opt-size=0: 49 <= dist <= 49
// 32-bit opt-size=1: 44 <= dist <= 49
// 64-bit opt-size=0: 50 <= dist <= 50
// 64-bit opt-size=1: 44 <= dist <= 50
assert_eq!(
3.196104012172126E-27,
ieee_parts_to_double(false, 934, 0x000FA7161A4D6E0C)
);
check!(3.196104012172126e-27);
}
#[test]
fn test_small_integers() {
check!(9007199254740991.0); // 2^53-1
check!(9007199254740992.0); // 2^53
check!(1.0);
check!(12.0);
check!(123.0);
check!(1234.0);
check!(12345.0);
check!(123456.0);
check!(1234567.0);
check!(12345678.0);
check!(123456789.0);
check!(1234567890.0);
check!(1234567895.0);
check!(12345678901.0);
check!(123456789012.0);
check!(1234567890123.0);
check!(12345678901234.0);
check!(123456789012345.0);
check!(1234567890123456.0);
// 10^i
check!(1.0);
check!(10.0);
check!(100.0);
check!(1000.0);
check!(10000.0);
check!(100000.0);
check!(1000000.0);
check!(10000000.0);
check!(100000000.0);
check!(1000000000.0);
check!(10000000000.0);
check!(100000000000.0);
check!(1000000000000.0);
check!(10000000000000.0);
check!(100000000000000.0);
check!(1000000000000000.0);
// 10^15 + 10^i
check!(1000000000000001.0);
check!(1000000000000010.0);
check!(1000000000000100.0);
check!(1000000000001000.0);
check!(1000000000010000.0);
check!(1000000000100000.0);
check!(1000000001000000.0);
check!(1000000010000000.0);
check!(1000000100000000.0);
check!(1000001000000000.0);
check!(1000010000000000.0);
check!(1000100000000000.0);
check!(1001000000000000.0);
check!(1010000000000000.0);
check!(1100000000000000.0);
// Largest power of 2 <= 10^(i+1)
check!(8.0);
check!(64.0);
check!(512.0);
check!(8192.0);
check!(65536.0);
check!(524288.0);
check!(8388608.0);
check!(67108864.0);
check!(536870912.0);
check!(8589934592.0);
check!(68719476736.0);
check!(549755813888.0);
check!(8796093022208.0);
check!(70368744177664.0);
check!(562949953421312.0);
check!(9007199254740992.0);
// 1000 * (Largest power of 2 <= 10^(i+1))
check!(8000.0);
check!(64000.0);
check!(512000.0);
check!(8192000.0);
check!(65536000.0);
check!(524288000.0);
check!(8388608000.0);
check!(67108864000.0);
check!(536870912000.0);
check!(8589934592000.0);
check!(68719476736000.0);
check!(549755813888000.0);
check!(8796093022208000.0);
}