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// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![macro_escape]
#![doc(hidden)]
macro_rules! int_module (($T:ty, $bits:expr) => (
// FIXME(#11621): Should be deprecated once CTFE is implemented in favour of
// calling the `mem::size_of` function.
#[unstable]
pub static BITS : uint = $bits;
// FIXME(#11621): Should be deprecated once CTFE is implemented in favour of
// calling the `mem::size_of` function.
#[unstable]
pub static BYTES : uint = ($bits / 8);
// FIXME(#11621): Should be deprecated once CTFE is implemented in favour of
// calling the `Bounded::min_value` function.
#[unstable]
pub static MIN: $T = (-1 as $T) << (BITS - 1);
// FIXME(#9837): Compute MIN like this so the high bits that shouldn't exist are 0.
// FIXME(#11621): Should be deprecated once CTFE is implemented in favour of
// calling the `Bounded::max_value` function.
#[unstable]
pub static MAX: $T = !MIN;
#[cfg(test)]
mod tests {
use prelude::*;
use super::*;
use int;
use num;
use num::CheckedDiv;
#[test]
fn test_overflows() {
assert!(MAX > 0);
assert!(MIN <= 0);
assert!(MIN + MAX + 1 == 0);
}
#[test]
fn test_num() {
num::test_num(10 as $T, 2 as $T);
}
#[test]
pub fn test_abs() {
assert!((1 as $T).abs() == 1 as $T);
assert!((0 as $T).abs() == 0 as $T);
assert!((-1 as $T).abs() == 1 as $T);
}
#[test]
fn test_abs_sub() {
assert!((-1 as $T).abs_sub(&(1 as $T)) == 0 as $T);
assert!((1 as $T).abs_sub(&(1 as $T)) == 0 as $T);
assert!((1 as $T).abs_sub(&(0 as $T)) == 1 as $T);
assert!((1 as $T).abs_sub(&(-1 as $T)) == 2 as $T);
}
#[test]
fn test_signum() {
assert!((1 as $T).signum() == 1 as $T);
assert!((0 as $T).signum() == 0 as $T);
assert!((-0 as $T).signum() == 0 as $T);
assert!((-1 as $T).signum() == -1 as $T);
}
#[test]
fn test_is_positive() {
assert!((1 as $T).is_positive());
assert!(!(0 as $T).is_positive());
assert!(!(-0 as $T).is_positive());
assert!(!(-1 as $T).is_positive());
}
#[test]
fn test_is_negative() {
assert!(!(1 as $T).is_negative());
assert!(!(0 as $T).is_negative());
assert!(!(-0 as $T).is_negative());
assert!((-1 as $T).is_negative());
}
#[test]
fn test_bitwise_operators() {
assert!(0b1110 as $T == (0b1100 as $T).bitor(&(0b1010 as $T)));
assert!(0b1000 as $T == (0b1100 as $T).bitand(&(0b1010 as $T)));
assert!(0b0110 as $T == (0b1100 as $T).bitxor(&(0b1010 as $T)));
assert!(0b1110 as $T == (0b0111 as $T).shl(&(1 as $T)));
assert!(0b0111 as $T == (0b1110 as $T).shr(&(1 as $T)));
assert!(-(0b11 as $T) - (1 as $T) == (0b11 as $T).not());
}
static A: $T = 0b0101100;
static B: $T = 0b0100001;
static C: $T = 0b1111001;
static _0: $T = 0;
static _1: $T = !0;
#[test]
fn test_count_ones() {
assert!(A.count_ones() == 3);
assert!(B.count_ones() == 2);
assert!(C.count_ones() == 5);
}
#[test]
fn test_count_zeros() {
assert!(A.count_zeros() == BITS as $T - 3);
assert!(B.count_zeros() == BITS as $T - 2);
assert!(C.count_zeros() == BITS as $T - 5);
}
#[test]
fn test_rotate() {
assert_eq!(A.rotate_left(6).rotate_right(2).rotate_right(4), A);
assert_eq!(B.rotate_left(3).rotate_left(2).rotate_right(5), B);
assert_eq!(C.rotate_left(6).rotate_right(2).rotate_right(4), C);
// Rotating these should make no difference
//
// We test using 124 bits because to ensure that overlong bit shifts do
// not cause undefined behaviour. See #10183.
assert_eq!(_0.rotate_left(124), _0);
assert_eq!(_1.rotate_left(124), _1);
assert_eq!(_0.rotate_right(124), _0);
assert_eq!(_1.rotate_right(124), _1);
}
#[test]
fn test_swap_bytes() {
assert_eq!(A.swap_bytes().swap_bytes(), A);
assert_eq!(B.swap_bytes().swap_bytes(), B);
assert_eq!(C.swap_bytes().swap_bytes(), C);
// Swapping these should make no difference
assert_eq!(_0.swap_bytes(), _0);
assert_eq!(_1.swap_bytes(), _1);
}
#[test]
fn test_le() {
assert_eq!(Int::from_le(A.to_le()), A);
assert_eq!(Int::from_le(B.to_le()), B);
assert_eq!(Int::from_le(C.to_le()), C);
assert_eq!(Int::from_le(_0), _0);
assert_eq!(Int::from_le(_1), _1);
assert_eq!(_0.to_le(), _0);
assert_eq!(_1.to_le(), _1);
}
#[test]
fn test_be() {
assert_eq!(Int::from_be(A.to_be()), A);
assert_eq!(Int::from_be(B.to_be()), B);
assert_eq!(Int::from_be(C.to_be()), C);
assert_eq!(Int::from_be(_0), _0);
assert_eq!(Int::from_be(_1), _1);
assert_eq!(_0.to_be(), _0);
assert_eq!(_1.to_be(), _1);
}
#[test]
fn test_signed_checked_div() {
assert!(10i.checked_div(&2) == Some(5));
assert!(5i.checked_div(&0) == None);
assert!(int::MIN.checked_div(&-1) == None);
}
}
))
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