1 // Translated from C to Rust. The original C code can be found at
2 // https://github.com/ulfjack/ryu and carries the following license:
3 //
4 // Copyright 2018 Ulf Adams
5 //
6 // The contents of this file may be used under the terms of the Apache License,
7 // Version 2.0.
8 //
9 // (See accompanying file LICENSE-Apache or copy at
10 // http://www.apache.org/licenses/LICENSE-2.0)
11 //
12 // Alternatively, the contents of this file may be used under the terms of
13 // the Boost Software License, Version 1.0.
14 // (See accompanying file LICENSE-Boost or copy at
15 // https://www.boost.org/LICENSE_1_0.txt)
16 //
17 // Unless required by applicable law or agreed to in writing, this software
18 // is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
19 // KIND, either express or implied.
20
21 #![allow(dead_code)]
22
23 #[path = "../src/common.rs"]
24 mod common;
25
26 use common::*;
27
28 #[test]
test_decimal_length9()29 fn test_decimal_length9() {
30 assert_eq!(1, decimal_length9(0));
31 assert_eq!(1, decimal_length9(1));
32 assert_eq!(1, decimal_length9(9));
33 assert_eq!(2, decimal_length9(10));
34 assert_eq!(2, decimal_length9(99));
35 assert_eq!(3, decimal_length9(100));
36 assert_eq!(3, decimal_length9(999));
37 assert_eq!(9, decimal_length9(999999999));
38 }
39
40 #[test]
test_ceil_log2_pow5()41 fn test_ceil_log2_pow5() {
42 assert_eq!(1, ceil_log2_pow5(0));
43 assert_eq!(3, ceil_log2_pow5(1));
44 assert_eq!(5, ceil_log2_pow5(2));
45 assert_eq!(7, ceil_log2_pow5(3));
46 assert_eq!(10, ceil_log2_pow5(4));
47 assert_eq!(8192, ceil_log2_pow5(3528));
48 }
49
50 #[test]
test_log10_pow2()51 fn test_log10_pow2() {
52 assert_eq!(0, log10_pow2(0));
53 assert_eq!(0, log10_pow2(1));
54 assert_eq!(0, log10_pow2(2));
55 assert_eq!(0, log10_pow2(3));
56 assert_eq!(1, log10_pow2(4));
57 assert_eq!(496, log10_pow2(1650));
58 }
59
60 #[test]
test_log10_pow5()61 fn test_log10_pow5() {
62 assert_eq!(0, log10_pow5(0));
63 assert_eq!(0, log10_pow5(1));
64 assert_eq!(1, log10_pow5(2));
65 assert_eq!(2, log10_pow5(3));
66 assert_eq!(2, log10_pow5(4));
67 assert_eq!(1831, log10_pow5(2620));
68 }
69
70 #[test]
test_float_to_bits()71 fn test_float_to_bits() {
72 assert_eq!(0, 0.0_f32.to_bits());
73 assert_eq!(0x40490fda, 3.1415926_f32.to_bits());
74 }
75
76 #[test]
test_double_to_bits()77 fn test_double_to_bits() {
78 assert_eq!(0, 0.0_f64.to_bits());
79 assert_eq!(
80 0x400921FB54442D18,
81 3.1415926535897932384626433_f64.to_bits(),
82 );
83 }
84