blob: 91438ee26add7e2ca4441b84e44494532c245507 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
// Copyright 2019 The Servo 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.
pub trait VecExt {
type Item;
unsafe fn set_end_ptr(&mut self, end: *const Self::Item);
}
impl<T> VecExt for Vec<T> {
type Item = T;
unsafe fn set_end_ptr(&mut self, end: *const T) {
assert!(end as usize >= self.as_ptr() as usize);
let new_len = end as usize - self.as_ptr() as usize;
assert!(new_len <= self.capacity());
self.set_len(new_len);
}
}
|
