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};
22 assert!((MIN + MAX).wrapping_add(1) == 0);
27 num::test_num(10 as $T, 2 as $T);
31 fn test_bitwise_operators() {
32 assert!(0b1110 as $T == (0b1100 as $T).bitor(0b1010 as $T));
33 assert!(0b1000 as $T == (0b1100 as $T).bitand(0b1010 as $T));
34 assert!(0b0110 as $T == (0b1100 as $T).bitxor(0b1010 as $T));
35 assert!(0b1110 as $T == (0b0111 as $T).shl(1));
36 assert!(0b0111 as $T == (0b1110 as $T).shr(1));
37 assert!(MAX - (0b1011 as $T) == (0b1011 as $T).not());
40 const A: $T = 0b0101100;
41 const B: $T = 0b0100001;
42 const C: $T = 0b1111001;
48 fn test_count_ones() {
49 assert!(A.count_ones() == 3);
50 assert!(B.count_ones() == 2);
51 assert!(C.count_ones() == 5);
55 fn test_count_zeros() {
56 assert!(A.count_zeros() == BITS as u32 - 3);
57 assert!(B.count_zeros() == BITS as u32 - 2);
58 assert!(C.count_zeros() == BITS as u32 - 5);
63 assert_eq!(A.rotate_left(6).rotate_right(2).rotate_right(4), A);
64 assert_eq!(B.rotate_left(3).rotate_left(2).rotate_right(5), B);
65 assert_eq!(C.rotate_left(6).rotate_right(2).rotate_right(4), C);
67 // Rotating these should make no difference
69 // We test using 124 bits because to ensure that overlong bit shifts do
70 // not cause undefined behaviour. See #10183.
71 assert_eq!(_0.rotate_left(124), _0);
72 assert_eq!(_1.rotate_left(124), _1);
73 assert_eq!(_0.rotate_right(124), _0);
74 assert_eq!(_1.rotate_right(124), _1);
76 // Rotating by 0 should have no effect
77 assert_eq!(A.rotate_left(0), A);
78 assert_eq!(B.rotate_left(0), B);
79 assert_eq!(C.rotate_left(0), C);
80 // Rotating by a multiple of word size should also have no effect
81 assert_eq!(A.rotate_left(64), A);
82 assert_eq!(B.rotate_left(64), B);
83 assert_eq!(C.rotate_left(64), C);
87 fn test_swap_bytes() {
88 assert_eq!(A.swap_bytes().swap_bytes(), A);
89 assert_eq!(B.swap_bytes().swap_bytes(), B);
90 assert_eq!(C.swap_bytes().swap_bytes(), C);
92 // Swapping these should make no difference
93 assert_eq!(_0.swap_bytes(), _0);
94 assert_eq!(_1.swap_bytes(), _1);
99 assert_eq!($T::from_le(A.to_le()), A);
100 assert_eq!($T::from_le(B.to_le()), B);
101 assert_eq!($T::from_le(C.to_le()), C);
102 assert_eq!($T::from_le(_0), _0);
103 assert_eq!($T::from_le(_1), _1);
104 assert_eq!(_0.to_le(), _0);
105 assert_eq!(_1.to_le(), _1);
110 assert_eq!($T::from_be(A.to_be()), A);
111 assert_eq!($T::from_be(B.to_be()), B);
112 assert_eq!($T::from_be(C.to_be()), C);
113 assert_eq!($T::from_be(_0), _0);
114 assert_eq!($T::from_be(_1), _1);
115 assert_eq!(_0.to_be(), _0);
116 assert_eq!(_1.to_be(), _1);
120 fn test_unsigned_checked_div() {
121 assert!((10 as $T).checked_div(2) == Some(5));
122 assert!((5 as $T).checked_div(0) == None);