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.
13 macro_rules! int_module (($T:ty, $T_i:ident) => (
19 use core::num::CheckedDiv;
25 assert!(MIN + MAX + 1 == 0);
30 num::test_num(10 as $T, 2 as $T);
35 assert!((1 as $T).abs() == 1 as $T);
36 assert!((0 as $T).abs() == 0 as $T);
37 assert!((-1 as $T).abs() == 1 as $T);
42 assert!((-1 as $T).abs_sub(&(1 as $T)) == 0 as $T);
43 assert!((1 as $T).abs_sub(&(1 as $T)) == 0 as $T);
44 assert!((1 as $T).abs_sub(&(0 as $T)) == 1 as $T);
45 assert!((1 as $T).abs_sub(&(-1 as $T)) == 2 as $T);
50 assert!((1 as $T).signum() == 1 as $T);
51 assert!((0 as $T).signum() == 0 as $T);
52 assert!((-0 as $T).signum() == 0 as $T);
53 assert!((-1 as $T).signum() == -1 as $T);
57 fn test_is_positive() {
58 assert!((1 as $T).is_positive());
59 assert!(!(0 as $T).is_positive());
60 assert!(!(-0 as $T).is_positive());
61 assert!(!(-1 as $T).is_positive());
65 fn test_is_negative() {
66 assert!(!(1 as $T).is_negative());
67 assert!(!(0 as $T).is_negative());
68 assert!(!(-0 as $T).is_negative());
69 assert!((-1 as $T).is_negative());
73 fn test_bitwise_operators() {
74 assert!(0b1110 as $T == (0b1100 as $T).bitor(&(0b1010 as $T)));
75 assert!(0b1000 as $T == (0b1100 as $T).bitand(&(0b1010 as $T)));
76 assert!(0b0110 as $T == (0b1100 as $T).bitxor(&(0b1010 as $T)));
77 assert!(0b1110 as $T == (0b0111 as $T).shl(&(1 as $T)));
78 assert!(0b0111 as $T == (0b1110 as $T).shr(&(1 as $T)));
79 assert!(-(0b11 as $T) - (1 as $T) == (0b11 as $T).not());
82 static A: $T = 0b0101100;
83 static B: $T = 0b0100001;
84 static C: $T = 0b1111001;
90 fn test_count_ones() {
91 assert!(A.count_ones() == 3);
92 assert!(B.count_ones() == 2);
93 assert!(C.count_ones() == 5);
97 fn test_count_zeros() {
98 assert!(A.count_zeros() == BITS as $T - 3);
99 assert!(B.count_zeros() == BITS as $T - 2);
100 assert!(C.count_zeros() == BITS as $T - 5);
105 assert_eq!(A.rotate_left(6).rotate_right(2).rotate_right(4), A);
106 assert_eq!(B.rotate_left(3).rotate_left(2).rotate_right(5), B);
107 assert_eq!(C.rotate_left(6).rotate_right(2).rotate_right(4), C);
109 // Rotating these should make no difference
111 // We test using 124 bits because to ensure that overlong bit shifts do
112 // not cause undefined behaviour. See #10183.
113 assert_eq!(_0.rotate_left(124), _0);
114 assert_eq!(_1.rotate_left(124), _1);
115 assert_eq!(_0.rotate_right(124), _0);
116 assert_eq!(_1.rotate_right(124), _1);
120 fn test_swap_bytes() {
121 assert_eq!(A.swap_bytes().swap_bytes(), A);
122 assert_eq!(B.swap_bytes().swap_bytes(), B);
123 assert_eq!(C.swap_bytes().swap_bytes(), C);
125 // Swapping these should make no difference
126 assert_eq!(_0.swap_bytes(), _0);
127 assert_eq!(_1.swap_bytes(), _1);
132 assert_eq!(Int::from_le(A.to_le()), A);
133 assert_eq!(Int::from_le(B.to_le()), B);
134 assert_eq!(Int::from_le(C.to_le()), C);
135 assert_eq!(Int::from_le(_0), _0);
136 assert_eq!(Int::from_le(_1), _1);
137 assert_eq!(_0.to_le(), _0);
138 assert_eq!(_1.to_le(), _1);
143 assert_eq!(Int::from_be(A.to_be()), A);
144 assert_eq!(Int::from_be(B.to_be()), B);
145 assert_eq!(Int::from_be(C.to_be()), C);
146 assert_eq!(Int::from_be(_0), _0);
147 assert_eq!(Int::from_be(_1), _1);
148 assert_eq!(_0.to_be(), _0);
149 assert_eq!(_1.to_be(), _1);
153 fn test_signed_checked_div() {
154 assert!(10i.checked_div(&2) == Some(5));
155 assert!(5i.checked_div(&0) == None);
156 assert!(int::MIN.checked_div(&-1) == None);