1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
#![deny(unsafe_op_in_unsafe_fn)]
use crate::marker::PhantomData;
use crate::os::fd::{AsFd, AsRawFd};
use crate::slice;
#[derive(Copy, Clone)]
#[repr(transparent)]
pub struct IoSlice<'a> {
vec: wasi::Ciovec,
_p: PhantomData<&'a [u8]>,
}
impl<'a> IoSlice<'a> {
#[inline]
pub fn new(buf: &'a [u8]) -> IoSlice<'a> {
IoSlice { vec: wasi::Ciovec { buf: buf.as_ptr(), buf_len: buf.len() }, _p: PhantomData }
}
#[inline]
pub fn advance(&mut self, n: usize) {
if self.vec.buf_len < n {
panic!("advancing IoSlice beyond its length");
}
unsafe {
self.vec.buf_len -= n;
self.vec.buf = self.vec.buf.add(n);
}
}
#[inline]
pub fn as_slice(&self) -> &[u8] {
unsafe { slice::from_raw_parts(self.vec.buf as *const u8, self.vec.buf_len) }
}
}
#[repr(transparent)]
pub struct IoSliceMut<'a> {
vec: wasi::Iovec,
_p: PhantomData<&'a mut [u8]>,
}
impl<'a> IoSliceMut<'a> {
#[inline]
pub fn new(buf: &'a mut [u8]) -> IoSliceMut<'a> {
IoSliceMut {
vec: wasi::Iovec { buf: buf.as_mut_ptr(), buf_len: buf.len() },
_p: PhantomData,
}
}
#[inline]
pub fn advance(&mut self, n: usize) {
if self.vec.buf_len < n {
panic!("advancing IoSlice beyond its length");
}
unsafe {
self.vec.buf_len -= n;
self.vec.buf = self.vec.buf.add(n);
}
}
#[inline]
pub fn as_slice(&self) -> &[u8] {
unsafe { slice::from_raw_parts(self.vec.buf as *const u8, self.vec.buf_len) }
}
#[inline]
pub fn as_mut_slice(&mut self) -> &mut [u8] {
unsafe { slice::from_raw_parts_mut(self.vec.buf as *mut u8, self.vec.buf_len) }
}
}
pub fn is_terminal(fd: &impl AsFd) -> bool {
let fd = fd.as_fd();
unsafe { libc::isatty(fd.as_raw_fd()) != 0 }
}
|
