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[rustc.git] / src / libcoretest / num / int_macros.rs
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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.
4//
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.
10
9346a6ac 11macro_rules! int_module { ($T:ident, $T_i:ident) => (
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12#[cfg(test)]
13mod tests {
14 use core::$T_i::*;
c34b1796 15 use core::isize;
1a4d82fc 16 use core::ops::{Shl, Shr, Not, BitXor, BitAnd, BitOr};
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17 use core::mem;
18
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19 use num;
20
21 #[test]
22 fn test_overflows() {
23 assert!(MAX > 0);
24 assert!(MIN <= 0);
25 assert!(MIN + MAX + 1 == 0);
26 }
27
28 #[test]
29 fn test_num() {
30 num::test_num(10 as $T, 2 as $T);
31 }
32
33 #[test]
34 pub fn test_abs() {
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);
38 }
39
40 #[test]
41 fn test_signum() {
42 assert!((1 as $T).signum() == 1 as $T);
43 assert!((0 as $T).signum() == 0 as $T);
44 assert!((-0 as $T).signum() == 0 as $T);
45 assert!((-1 as $T).signum() == -1 as $T);
46 }
47
48 #[test]
49 fn test_is_positive() {
50 assert!((1 as $T).is_positive());
51 assert!(!(0 as $T).is_positive());
52 assert!(!(-0 as $T).is_positive());
53 assert!(!(-1 as $T).is_positive());
54 }
55
56 #[test]
57 fn test_is_negative() {
58 assert!(!(1 as $T).is_negative());
59 assert!(!(0 as $T).is_negative());
60 assert!(!(-0 as $T).is_negative());
61 assert!((-1 as $T).is_negative());
62 }
63
64 #[test]
65 fn test_bitwise_operators() {
66 assert!(0b1110 as $T == (0b1100 as $T).bitor(0b1010 as $T));
67 assert!(0b1000 as $T == (0b1100 as $T).bitand(0b1010 as $T));
68 assert!(0b0110 as $T == (0b1100 as $T).bitxor(0b1010 as $T));
69 assert!(0b1110 as $T == (0b0111 as $T).shl(1));
70 assert!(0b0111 as $T == (0b1110 as $T).shr(1));
71 assert!(-(0b11 as $T) - (1 as $T) == (0b11 as $T).not());
72 }
73
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74 const A: $T = 0b0101100;
75 const B: $T = 0b0100001;
76 const C: $T = 0b1111001;
1a4d82fc 77
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78 const _0: $T = 0;
79 const _1: $T = !0;
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80
81 #[test]
82 fn test_count_ones() {
83 assert!(A.count_ones() == 3);
84 assert!(B.count_ones() == 2);
85 assert!(C.count_ones() == 5);
86 }
87
88 #[test]
89 fn test_count_zeros() {
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90 let bits = mem::size_of::<$T>() * 8;
91 assert!(A.count_zeros() == bits as u32 - 3);
92 assert!(B.count_zeros() == bits as u32 - 2);
93 assert!(C.count_zeros() == bits as u32 - 5);
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94 }
95
96 #[test]
97 fn test_rotate() {
98 assert_eq!(A.rotate_left(6).rotate_right(2).rotate_right(4), A);
99 assert_eq!(B.rotate_left(3).rotate_left(2).rotate_right(5), B);
100 assert_eq!(C.rotate_left(6).rotate_right(2).rotate_right(4), C);
101
102 // Rotating these should make no difference
103 //
104 // We test using 124 bits because to ensure that overlong bit shifts do
105 // not cause undefined behaviour. See #10183.
106 assert_eq!(_0.rotate_left(124), _0);
107 assert_eq!(_1.rotate_left(124), _1);
108 assert_eq!(_0.rotate_right(124), _0);
109 assert_eq!(_1.rotate_right(124), _1);
110
111 // Rotating by 0 should have no effect
112 assert_eq!(A.rotate_left(0), A);
113 assert_eq!(B.rotate_left(0), B);
114 assert_eq!(C.rotate_left(0), C);
115 // Rotating by a multiple of word size should also have no effect
116 assert_eq!(A.rotate_left(64), A);
117 assert_eq!(B.rotate_left(64), B);
118 assert_eq!(C.rotate_left(64), C);
119 }
120
121 #[test]
122 fn test_swap_bytes() {
123 assert_eq!(A.swap_bytes().swap_bytes(), A);
124 assert_eq!(B.swap_bytes().swap_bytes(), B);
125 assert_eq!(C.swap_bytes().swap_bytes(), C);
126
127 // Swapping these should make no difference
128 assert_eq!(_0.swap_bytes(), _0);
129 assert_eq!(_1.swap_bytes(), _1);
130 }
131
132 #[test]
133 fn test_le() {
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134 assert_eq!($T::from_le(A.to_le()), A);
135 assert_eq!($T::from_le(B.to_le()), B);
136 assert_eq!($T::from_le(C.to_le()), C);
137 assert_eq!($T::from_le(_0), _0);
138 assert_eq!($T::from_le(_1), _1);
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139 assert_eq!(_0.to_le(), _0);
140 assert_eq!(_1.to_le(), _1);
141 }
142
143 #[test]
144 fn test_be() {
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145 assert_eq!($T::from_be(A.to_be()), A);
146 assert_eq!($T::from_be(B.to_be()), B);
147 assert_eq!($T::from_be(C.to_be()), C);
148 assert_eq!($T::from_be(_0), _0);
149 assert_eq!($T::from_be(_1), _1);
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150 assert_eq!(_0.to_be(), _0);
151 assert_eq!(_1.to_be(), _1);
152 }
153
154 #[test]
155 fn test_signed_checked_div() {
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156 assert!((10 as $T).checked_div(2) == Some(5));
157 assert!((5 as $T).checked_div(0) == None);
c34b1796 158 assert!(isize::MIN.checked_div(-1) == None);
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159 }
160
161 #[test]
162 fn test_from_str() {
163 fn from_str<T: ::std::str::FromStr>(t: &str) -> Option<T> {
85aaf69f 164 ::std::str::FromStr::from_str(t).ok()
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165 }
166 assert_eq!(from_str::<$T>("0"), Some(0 as $T));
167 assert_eq!(from_str::<$T>("3"), Some(3 as $T));
168 assert_eq!(from_str::<$T>("10"), Some(10 as $T));
169 assert_eq!(from_str::<i32>("123456789"), Some(123456789 as i32));
170 assert_eq!(from_str::<$T>("00100"), Some(100 as $T));
171
172 assert_eq!(from_str::<$T>("-1"), Some(-1 as $T));
173 assert_eq!(from_str::<$T>("-3"), Some(-3 as $T));
174 assert_eq!(from_str::<$T>("-10"), Some(-10 as $T));
175 assert_eq!(from_str::<i32>("-123456789"), Some(-123456789 as i32));
176 assert_eq!(from_str::<$T>("-00100"), Some(-100 as $T));
177
178 assert_eq!(from_str::<$T>(""), None);
179 assert_eq!(from_str::<$T>(" "), None);
180 assert_eq!(from_str::<$T>("x"), None);
181 }
182
183 #[test]
184 fn test_from_str_radix() {
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185 assert_eq!($T::from_str_radix("123", 10), Ok(123 as $T));
186 assert_eq!($T::from_str_radix("1001", 2), Ok(9 as $T));
187 assert_eq!($T::from_str_radix("123", 8), Ok(83 as $T));
188 assert_eq!(i32::from_str_radix("123", 16), Ok(291 as i32));
189 assert_eq!(i32::from_str_radix("ffff", 16), Ok(65535 as i32));
190 assert_eq!(i32::from_str_radix("FFFF", 16), Ok(65535 as i32));
191 assert_eq!($T::from_str_radix("z", 36), Ok(35 as $T));
192 assert_eq!($T::from_str_radix("Z", 36), Ok(35 as $T));
193
194 assert_eq!($T::from_str_radix("-123", 10), Ok(-123 as $T));
195 assert_eq!($T::from_str_radix("-1001", 2), Ok(-9 as $T));
196 assert_eq!($T::from_str_radix("-123", 8), Ok(-83 as $T));
197 assert_eq!(i32::from_str_radix("-123", 16), Ok(-291 as i32));
198 assert_eq!(i32::from_str_radix("-ffff", 16), Ok(-65535 as i32));
199 assert_eq!(i32::from_str_radix("-FFFF", 16), Ok(-65535 as i32));
200 assert_eq!($T::from_str_radix("-z", 36), Ok(-35 as $T));
201 assert_eq!($T::from_str_radix("-Z", 36), Ok(-35 as $T));
202
203 assert_eq!($T::from_str_radix("Z", 35).ok(), None::<$T>);
204 assert_eq!($T::from_str_radix("-9", 2).ok(), None::<$T>);
1a4d82fc 205 }
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206
207 #[test]
208 fn test_pow() {
209 let mut r = 2 as $T;
210
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211 assert_eq!(r.pow(2), 4 as $T);
212 assert_eq!(r.pow(0), 1 as $T);
c34b1796 213 r = -2 as $T;
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214 assert_eq!(r.pow(2), 4 as $T);
215 assert_eq!(r.pow(3), -8 as $T);
c34b1796 216 }
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217}
218
219)}