92 lines
2.6 KiB
Rust
92 lines
2.6 KiB
Rust
// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Operations and constants for architecture-sized unsigned integers (`uint` type)
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#[allow(non_uppercase_statics)];
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use prelude::*;
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use default::Default;
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use num::{Bitwise, Bounded};
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use num::{CheckedAdd, CheckedSub, CheckedMul};
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use num::{CheckedDiv, Zero, One, strconv};
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use num::{ToStrRadix, FromStrRadix};
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use option::{Option, Some, None};
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use str;
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use intrinsics;
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uint_module!(uint, int, ::int::BITS)
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#[cfg(target_word_size = "32")]
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impl CheckedAdd for uint {
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#[inline]
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fn checked_add(&self, v: &uint) -> Option<uint> {
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unsafe {
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let (x, y) = intrinsics::u32_add_with_overflow(*self as u32, *v as u32);
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if y { None } else { Some(x as uint) }
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}
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}
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}
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#[cfg(target_word_size = "64")]
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impl CheckedAdd for uint {
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#[inline]
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fn checked_add(&self, v: &uint) -> Option<uint> {
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unsafe {
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let (x, y) = intrinsics::u64_add_with_overflow(*self as u64, *v as u64);
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if y { None } else { Some(x as uint) }
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}
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}
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}
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#[cfg(target_word_size = "32")]
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impl CheckedSub for uint {
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#[inline]
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fn checked_sub(&self, v: &uint) -> Option<uint> {
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unsafe {
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let (x, y) = intrinsics::u32_sub_with_overflow(*self as u32, *v as u32);
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if y { None } else { Some(x as uint) }
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}
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}
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}
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#[cfg(target_word_size = "64")]
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impl CheckedSub for uint {
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#[inline]
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fn checked_sub(&self, v: &uint) -> Option<uint> {
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unsafe {
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let (x, y) = intrinsics::u64_sub_with_overflow(*self as u64, *v as u64);
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if y { None } else { Some(x as uint) }
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}
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}
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}
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#[cfg(target_word_size = "32")]
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impl CheckedMul for uint {
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#[inline]
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fn checked_mul(&self, v: &uint) -> Option<uint> {
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unsafe {
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let (x, y) = intrinsics::u32_mul_with_overflow(*self as u32, *v as u32);
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if y { None } else { Some(x as uint) }
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}
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}
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}
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#[cfg(target_word_size = "64")]
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impl CheckedMul for uint {
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#[inline]
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fn checked_mul(&self, v: &uint) -> Option<uint> {
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unsafe {
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let (x, y) = intrinsics::u64_mul_with_overflow(*self as u64, *v as u64);
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if y { None } else { Some(x as uint) }
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}
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}
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}
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