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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.
//! Operations and constants for architecture-sized unsigned integers (`uint` type)
#[allow(non_uppercase_statics)];
use prelude::*;
use default::Default;
use num::{Bitwise, Bounded};
use num::{CheckedAdd, CheckedSub, CheckedMul};
use num::{CheckedDiv, Zero, One, strconv};
use num::{ToStrRadix, FromStrRadix};
use option::{Option, Some, None};
use str;
use unstable::intrinsics;
uint_module!(uint, int, ::int::BITS)
#[cfg(target_word_size = "32")]
impl CheckedAdd for uint {
#[inline]
fn checked_add(&self, v: &uint) -> Option<uint> {
unsafe {
let (x, y) = intrinsics::u32_add_with_overflow(*self as u32, *v as u32);
if y { None } else { Some(x as uint) }
}
}
}
#[cfg(target_word_size = "64")]
impl CheckedAdd for uint {
#[inline]
fn checked_add(&self, v: &uint) -> Option<uint> {
unsafe {
let (x, y) = intrinsics::u64_add_with_overflow(*self as u64, *v as u64);
if y { None } else { Some(x as uint) }
}
}
}
#[cfg(target_word_size = "32")]
impl CheckedSub for uint {
#[inline]
fn checked_sub(&self, v: &uint) -> Option<uint> {
unsafe {
let (x, y) = intrinsics::u32_sub_with_overflow(*self as u32, *v as u32);
if y { None } else { Some(x as uint) }
}
}
}
#[cfg(target_word_size = "64")]
impl CheckedSub for uint {
#[inline]
fn checked_sub(&self, v: &uint) -> Option<uint> {
unsafe {
let (x, y) = intrinsics::u64_sub_with_overflow(*self as u64, *v as u64);
if y { None } else { Some(x as uint) }
}
}
}
#[cfg(target_word_size = "32")]
impl CheckedMul for uint {
#[inline]
fn checked_mul(&self, v: &uint) -> Option<uint> {
unsafe {
let (x, y) = intrinsics::u32_mul_with_overflow(*self as u32, *v as u32);
if y { None } else { Some(x as uint) }
}
}
}
#[cfg(target_word_size = "64")]
impl CheckedMul for uint {
#[inline]
fn checked_mul(&self, v: &uint) -> Option<uint> {
unsafe {
let (x, y) = intrinsics::u64_mul_with_overflow(*self as u64, *v as u64);
if y { None } else { Some(x as uint) }
}
}
}
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