1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 macro_rules! uint_module { ($T:ident, $T_i:ident) => (
16 use core::ops::{BitOr, BitAnd, BitXor, Shl, Shr, Not};
17 use std::str::FromStr;
24 assert!((MIN + MAX).wrapping_add(1) == 0);
29 num::test_num(10 as $T, 2 as $T);
33 fn test_bitwise_operators() {
34 assert!(0b1110 as $T == (0b1100 as $T).bitor(0b1010 as $T));
35 assert!(0b1000 as $T == (0b1100 as $T).bitand(0b1010 as $T));
36 assert!(0b0110 as $T == (0b1100 as $T).bitxor(0b1010 as $T));
37 assert!(0b1110 as $T == (0b0111 as $T).shl(1));
38 assert!(0b0111 as $T == (0b1110 as $T).shr(1));
39 assert!(MAX - (0b1011 as $T) == (0b1011 as $T).not());
42 const A: $T = 0b0101100;
43 const B: $T = 0b0100001;
44 const C: $T = 0b1111001;
50 fn test_count_ones() {
51 assert!(A.count_ones() == 3);
52 assert!(B.count_ones() == 2);
53 assert!(C.count_ones() == 5);
57 fn test_count_zeros() {
58 let bits = mem::size_of::<$T>() * 8;
59 assert!(A.count_zeros() == bits as u32 - 3);
60 assert!(B.count_zeros() == bits as u32 - 2);
61 assert!(C.count_zeros() == bits as u32 - 5);
66 assert_eq!(A.rotate_left(6).rotate_right(2).rotate_right(4), A);
67 assert_eq!(B.rotate_left(3).rotate_left(2).rotate_right(5), B);
68 assert_eq!(C.rotate_left(6).rotate_right(2).rotate_right(4), C);
70 // Rotating these should make no difference
72 // We test using 124 bits because to ensure that overlong bit shifts do
73 // not cause undefined behaviour. See #10183.
74 assert_eq!(_0.rotate_left(124), _0);
75 assert_eq!(_1.rotate_left(124), _1);
76 assert_eq!(_0.rotate_right(124), _0);
77 assert_eq!(_1.rotate_right(124), _1);
79 // Rotating by 0 should have no effect
80 assert_eq!(A.rotate_left(0), A);
81 assert_eq!(B.rotate_left(0), B);
82 assert_eq!(C.rotate_left(0), C);
83 // Rotating by a multiple of word size should also have no effect
84 assert_eq!(A.rotate_left(64), A);
85 assert_eq!(B.rotate_left(64), B);
86 assert_eq!(C.rotate_left(64), C);
90 fn test_swap_bytes() {
91 assert_eq!(A.swap_bytes().swap_bytes(), A);
92 assert_eq!(B.swap_bytes().swap_bytes(), B);
93 assert_eq!(C.swap_bytes().swap_bytes(), C);
95 // Swapping these should make no difference
96 assert_eq!(_0.swap_bytes(), _0);
97 assert_eq!(_1.swap_bytes(), _1);
101 fn test_reverse_bits() {
102 assert_eq!(A.reverse_bits().reverse_bits(), A);
103 assert_eq!(B.reverse_bits().reverse_bits(), B);
104 assert_eq!(C.reverse_bits().reverse_bits(), C);
106 // Swapping these should make no difference
107 assert_eq!(_0.reverse_bits(), _0);
108 assert_eq!(_1.reverse_bits(), _1);
113 assert_eq!($T::from_le(A.to_le()), A);
114 assert_eq!($T::from_le(B.to_le()), B);
115 assert_eq!($T::from_le(C.to_le()), C);
116 assert_eq!($T::from_le(_0), _0);
117 assert_eq!($T::from_le(_1), _1);
118 assert_eq!(_0.to_le(), _0);
119 assert_eq!(_1.to_le(), _1);
124 assert_eq!($T::from_be(A.to_be()), A);
125 assert_eq!($T::from_be(B.to_be()), B);
126 assert_eq!($T::from_be(C.to_be()), C);
127 assert_eq!($T::from_be(_0), _0);
128 assert_eq!($T::from_be(_1), _1);
129 assert_eq!(_0.to_be(), _0);
130 assert_eq!(_1.to_be(), _1);
134 fn test_unsigned_checked_div() {
135 assert!((10 as $T).checked_div(2) == Some(5));
136 assert!((5 as $T).checked_div(0) == None);
139 fn from_str<T: FromStr>(t: &str) -> Option<T> {
140 FromStr::from_str(t).ok()
144 pub fn test_from_str() {
145 assert_eq!(from_str::<$T>("0"), Some(0 as $T));
146 assert_eq!(from_str::<$T>("3"), Some(3 as $T));
147 assert_eq!(from_str::<$T>("10"), Some(10 as $T));
148 assert_eq!(from_str::<u32>("123456789"), Some(123456789 as u32));
149 assert_eq!(from_str::<$T>("00100"), Some(100 as $T));
151 assert_eq!(from_str::<$T>(""), None);
152 assert_eq!(from_str::<$T>(" "), None);
153 assert_eq!(from_str::<$T>("x"), None);
157 pub fn test_parse_bytes() {
158 assert_eq!($T::from_str_radix("123", 10), Ok(123 as $T));
159 assert_eq!($T::from_str_radix("1001", 2), Ok(9 as $T));
160 assert_eq!($T::from_str_radix("123", 8), Ok(83 as $T));
161 assert_eq!(u16::from_str_radix("123", 16), Ok(291 as u16));
162 assert_eq!(u16::from_str_radix("ffff", 16), Ok(65535 as u16));
163 assert_eq!($T::from_str_radix("z", 36), Ok(35 as $T));
165 assert_eq!($T::from_str_radix("Z", 10).ok(), None::<$T>);
166 assert_eq!($T::from_str_radix("_", 2).ok(), None::<$T>);