---

yaml
---
r: 66303
b: refs/heads/master
c: 524a92c
h: refs/heads/master
i:
  66301: bfe5501
  66299: 01a55c3
  66295: 38b0b06
  66287: cde4078
  66271: f04000e
  66239: 4b92f7e
  66175: 877fcbf
  66047: d585d33
v: v3

Author: lilyball

[refs]

@@ -1,5 +1,5 @@
 ---
-refs/heads/master: 35314c93fa07a21aea18548f59886285a303c696
+refs/heads/master: 524a92c72ff05613aa5bbd0d806910222741ae2a
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: 18e3db7392d2d0697b7e27d6d986139960144d85
 refs/heads/try: 7b78b52e602bb3ea8174f9b2006bff3315f03ef9

trunk/src/libstd/vec.rs

@@ -2288,6 +2288,22 @@ pub mod bytes {
     use uint;
     use vec::raw;
     use vec;
+    use ptr;
+
+    /// A trait for operations on mutable operations on `[u8]`
+    pub trait MutableByteVector {
+        /// Sets all bytes of the receiver to the given value.
+        pub fn set_memory(self, value: u8);
+    }
+
+    impl<'self> MutableByteVector for &'self mut [u8] {
+        #[inline]
+        fn set_memory(self, value: u8) {
+            do vec::as_mut_buf(self) |p, len| {
+                unsafe { ptr::set_memory(p, value, len) };
+            }
+        }
+    }
 
     /// Bytewise string comparison
     pub fn memcmp(a: &~[u8], b: &~[u8]) -> int {
@@ -3941,4 +3957,14 @@ mod tests {
         t!(@[int]);
         t!(~[int]);
     }
+
+    #[test]
+    fn test_bytes_set_memory() {
+        use vec::bytes::MutableByteVector;
+        let mut values = [1u8,2,3,4,5];
+        values.mut_slice(0,5).set_memory(0xAB);
+        assert_eq!(values, [0xAB, 0xAB, 0xAB, 0xAB, 0xAB]);
+        values.mut_slice(2,4).set_memory(0xFF);
+        assert_eq!(values, [0xAB, 0xAB, 0xFF, 0xFF, 0xAB]);
+    }
 }