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) }
41 pub struct IoSliceMut<'a> {
43 _p: PhantomData<&'a mut [u8]>,
46 impl<'a> IoSliceMut<'a> {
48 pub fn new(buf: &'a mut [u8]) -> IoSliceMut<'a> {
50 vec: iovec { iov_base: buf.as_mut_ptr() as *mut c_void, iov_len: buf.len() },
56 pub fn advance(&mut self, n: usize) {
57 if self.vec.iov_len < n {
58 panic!("advancing IoSliceMut beyond its length");
62 self.vec.iov_len -= n;
63 self.vec.iov_base = self.vec.iov_base.add(n);
68 pub fn as_slice(&self) -> &[u8] {
69 unsafe { slice::from_raw_parts(self.vec.iov_base as *mut u8, self.vec.iov_len) }
73 pub fn as_mut_slice(&mut self) -> &mut [u8] {
74 unsafe { slice::from_raw_parts_mut(self.vec.iov_base as *mut u8, self.vec.iov_len) }