1 use crate::marker::PhantomData;
4 use libc::{c_void, iovec};
8 pub struct IoSlice<'a> {
10 _p: PhantomData<&'a [u8]>,
13 impl<'a> IoSlice<'a> {
15 pub fn new(buf: &'a [u8]) -> IoSlice<'a> {
17 vec: iovec { iov_base: buf.as_ptr() as *mut u8 as *mut c_void, iov_len: buf.len() },
23 pub fn advance(&mut self, n: usize) {
24 if self.vec.iov_len < n {
25 panic!("advancing IoSlice beyond its length");
29 self.vec.iov_len -= n;
30 self.vec.iov_base = self.vec.iov_base.add(n);
35 pub fn as_slice(&self) -> &[u8] {
36 unsafe { slice::from_raw_parts(self.vec.iov_base as *mut u8, self.vec.iov_len) }
40 pub struct IoSliceMut<'a> {
42 _p: PhantomData<&'a mut [u8]>,
45 impl<'a> IoSliceMut<'a> {
47 pub fn new(buf: &'a mut [u8]) -> IoSliceMut<'a> {
49 vec: iovec { iov_base: buf.as_mut_ptr() as *mut c_void, iov_len: buf.len() },
55 pub fn advance(&mut self, n: usize) {
56 if self.vec.iov_len < n {
57 panic!("advancing IoSliceMut beyond its length");
61 self.vec.iov_len -= n;
62 self.vec.iov_base = self.vec.iov_base.add(n);
67 pub fn as_slice(&self) -> &[u8] {
68 unsafe { slice::from_raw_parts(self.vec.iov_base as *mut u8, self.vec.iov_len) }
72 pub fn as_mut_slice(&mut self) -> &mut [u8] {
73 unsafe { slice::from_raw_parts_mut(self.vec.iov_base as *mut u8, self.vec.iov_len) }