1 files changed, 123 insertions, 0 deletions
diff --git a/src/libcore/num/int.rs b/src/libcore/num/int.rs
new file mode 100644
index 00000000000..dacfe987d90
--- /dev/null
+++ b/src/libcore/num/int.rs
@@ -0,0 +1,123 @@
+// 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 signed integers (`int` type)
+
+use cmp::{Eq, Ord, TotalEq, TotalOrd, Less, Greater, Equal, Ordering};
+use default::Default;
+use intrinsics;
+use num::{Bitwise, Bounded, Zero, One, Signed, Num, Primitive, Int};
+use num::{CheckedDiv, CheckedAdd, CheckedSub, CheckedMul};
+use ops::{Add, Sub, Mul, Div, Rem, Neg, BitOr, BitAnd, BitXor};
+use ops::{Shl, Shr, Not};
+use option::{Option, Some, None};
+
+#[cfg(target_word_size = "32")] int_module!(int, 32)
+#[cfg(target_word_size = "64")] int_module!(int, 64)
+
+#[cfg(target_word_size = "32")]
+impl Bitwise for int {
+    /// Returns the number of ones in the binary representation of the number.
+    #[inline]
+    fn count_ones(&self) -> int { (*self as i32).count_ones() as int }
+
+    /// Returns the number of leading zeros in the in the binary representation
+    /// of the number.
+    #[inline]
+    fn leading_zeros(&self) -> int { (*self as i32).leading_zeros() as int }
+
+    /// Returns the number of trailing zeros in the in the binary representation
+    /// of the number.
+    #[inline]
+    fn trailing_zeros(&self) -> int { (*self as i32).trailing_zeros() as int }
+}
+
+#[cfg(target_word_size = "64")]
+impl Bitwise for int {
+    /// Returns the number of ones in the binary representation of the number.
+    #[inline]
+    fn count_ones(&self) -> int { (*self as i64).count_ones() as int }
+
+    /// Returns the number of leading zeros in the in the binary representation
+    /// of the number.
+    #[inline]
+    fn leading_zeros(&self) -> int { (*self as i64).leading_zeros() as int }
+
+    /// Returns the number of trailing zeros in the in the binary representation
+    /// of the number.
+    #[inline]
+    fn trailing_zeros(&self) -> int { (*self as i64).trailing_zeros() as int }
+}
+
+#[cfg(target_word_size = "32")]
+impl CheckedAdd for int {
+    #[inline]
+    fn checked_add(&self, v: &int) -> Option<int> {
+        unsafe {
+            let (x, y) = intrinsics::i32_add_with_overflow(*self as i32, *v as i32);
+            if y { None } else { Some(x as int) }
+        }
+    }
+}
+
+#[cfg(target_word_size = "64")]
+impl CheckedAdd for int {
+    #[inline]
+    fn checked_add(&self, v: &int) -> Option<int> {
+        unsafe {
+            let (x, y) = intrinsics::i64_add_with_overflow(*self as i64, *v as i64);
+            if y { None } else { Some(x as int) }
+        }
+    }
+}
+
+#[cfg(target_word_size = "32")]
+impl CheckedSub for int {
+    #[inline]
+    fn checked_sub(&self, v: &int) -> Option<int> {
+        unsafe {
+            let (x, y) = intrinsics::i32_sub_with_overflow(*self as i32, *v as i32);
+            if y { None } else { Some(x as int) }
+        }
+    }
+}
+
+#[cfg(target_word_size = "64")]
+impl CheckedSub for int {
+    #[inline]
+    fn checked_sub(&self, v: &int) -> Option<int> {
+        unsafe {
+            let (x, y) = intrinsics::i64_sub_with_overflow(*self as i64, *v as i64);
+            if y { None } else { Some(x as int) }
+        }
+    }
+}
+
+#[cfg(target_word_size = "32")]
+impl CheckedMul for int {
+    #[inline]
+    fn checked_mul(&self, v: &int) -> Option<int> {
+        unsafe {
+            let (x, y) = intrinsics::i32_mul_with_overflow(*self as i32, *v as i32);
+            if y { None } else { Some(x as int) }
+        }
+    }
+}
+
+#[cfg(target_word_size = "64")]
+impl CheckedMul for int {
+    #[inline]
+    fn checked_mul(&self, v: &int) -> Option<int> {
+        unsafe {
+            let (x, y) = intrinsics::i64_mul_with_overflow(*self as i64, *v as i64);
+            if y { None } else { Some(x as int) }
+        }
+    }
+}