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Ensure reverse_part does not access outside given vector

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Tommy M. McGuire 2013-03-01 17:06:37 -06:00 committed by Corey Richardson
parent 2264c7927d
commit 5948d8a826
1 changed files with 5 additions and 5 deletions
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10
src/libcore/vec.rs
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@ -1450,6 +1450,9 @@ pub fn reverse<T>(v: &mut [T]) {
*
* Reverse the elements in the vector between `start` and `end - 1`.
*
* If either start or end do not represent valid positions in the vector, the
* vector is returned unchanged.
*
* # Arguments
*
* * `v` - The mutable vector to be modified
@ -1469,13 +1472,10 @@ pub fn reverse<T>(v: &mut [T]) {
* ~~~
*
* `v` now contains `[1,4,3,2,5]`.
*
* # Safety note
*
* Behavior is undefined if `start` or `end` do not represent valid
* positions in `v`.
*/
pub fn reverse_part<T>(v: &mut [T], start: uint, end : uint) {
let sz = v.len();
if start >= sz || end > sz { return; }
let mut i = start;
let mut j = end - 1;
while i < j {