| Yi Kong | ce81bb6 | 2020-08-31 01:21:33 +0800 | [diff] [blame] | 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] |
| 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] |
| 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] |
| 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] |
| 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] |
| 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] |
| 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 | } |