1 // Copyright 2012-2014 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.
14 macro_rules! uint_module (($T:ty, $T_SIGNED:ty, $bits:expr) => (
16 pub static BITS : uint = $bits;
17 pub static BYTES : uint = ($bits / 8);
19 pub static MIN: $T = 0 as $T;
20 pub static MAX: $T = 0 as $T - 1 as $T;
35 assert!(MIN + MAX + 1 == 0);
40 num::test_num(10 as $T, 2 as $T);
45 assert!(0b1110 as $T == (0b1100 as $T).bitor(&(0b1010 as $T)));
46 assert!(0b1000 as $T == (0b1100 as $T).bitand(&(0b1010 as $T)));
47 assert!(0b0110 as $T == (0b1100 as $T).bitxor(&(0b1010 as $T)));
48 assert!(0b1110 as $T == (0b0111 as $T).shl(&(1 as $T)));
49 assert!(0b0111 as $T == (0b1110 as $T).shr(&(1 as $T)));
50 assert!(MAX - (0b1011 as $T) == (0b1011 as $T).not());
54 fn test_count_ones() {
55 assert!((0b0101100 as $T).count_ones() == 3);
56 assert!((0b0100001 as $T).count_ones() == 2);
57 assert!((0b1111001 as $T).count_ones() == 5);
61 fn test_count_zeros() {
62 assert!((0b0101100 as $T).count_zeros() == BITS as $T - 3);
63 assert!((0b0100001 as $T).count_zeros() == BITS as $T - 2);
64 assert!((0b1111001 as $T).count_zeros() == BITS as $T - 5);
69 let n: $T = 0b0101100; assert_eq!(n.rotate_left(6).rotate_right(2).rotate_right(4), n);
70 let n: $T = 0b0100001; assert_eq!(n.rotate_left(3).rotate_left(2).rotate_right(5), n);
71 let n: $T = 0b1111001; assert_eq!(n.rotate_left(6).rotate_right(2).rotate_right(4), n);
73 // Rotating these should make no difference
75 // We test using 124 bits because to ensure that overlong bit shifts do
76 // not cause undefined behaviour. See #10183.
77 let n: $T = 0; assert_eq!(n.rotate_left(124), n);
78 let n: $T = MAX; assert_eq!(n.rotate_left(124), n);
79 let n: $T = 0; assert_eq!(n.rotate_right(124), n);
80 let n: $T = MAX; assert_eq!(n.rotate_right(124), n);
84 fn test_unsigned_checked_div() {
85 assert!(10u.checked_div(&2) == Some(5));
86 assert!(5u.checked_div(&0) == None);