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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
#![deny(missing_docs)]
#![deny(warnings)]
#[cfg(test)]
extern crate partial_io;
use std::fmt;
use std::io::{BufRead, ErrorKind, Read, Seek, self, Write};
#[derive(Clone, Debug)]
pub struct Retry<T> {
inner: T,
}
impl<T> Retry<T> {
pub fn new(inner: T) -> Self {
Retry {inner}
}
pub fn into_inner(self) -> T {
self.inner
}
}
impl<T: Read> Read for Retry<T> {
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
loop {
match self.inner.read(buf) {
Err(ref e) if e.kind() == ErrorKind::Interrupted => continue,
res => return res,
}
}
}
fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
self.inner.read_to_end(buf)
}
fn read_to_string(&mut self, buf: &mut String) -> io::Result<usize> {
self.inner.read_to_string(buf)
}
fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
self.inner.read_exact(buf)
}
}
impl<T: BufRead> BufRead for Retry<T> {
fn fill_buf(&mut self) -> io::Result<&[u8]> {
loop {
match self.inner.fill_buf() {
Ok(_) => break,
Err(ref e) if e.kind() == ErrorKind::Interrupted => continue,
Err(e) => return Err(e),
}
}
self.inner.fill_buf()
}
fn consume(&mut self, n: usize) {
self.inner.consume(n)
}
fn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> io::Result<usize> {
self.inner.read_until(byte, buf)
}
fn read_line(&mut self, buf: &mut String) -> io::Result<usize> {
self.inner.read_line(buf)
}
}
impl<T: Write> Write for Retry<T> {
fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
loop {
match self.inner.write(buf) {
Err(ref e) if e.kind() == ErrorKind::Interrupted => continue,
res => return res,
}
}
}
fn flush(&mut self) -> io::Result<()> {
self.inner.flush()
}
fn write_all(&mut self, buf: &[u8]) -> io::Result<()> {
self.inner.write_all(buf)
}
fn write_fmt(&mut self, args: fmt::Arguments) -> io::Result<()> {
self.inner.write_fmt(args)
}
}
impl<T: Seek> Seek for Retry<T> {
fn seek(&mut self, pos: io::SeekFrom) -> io::Result<u64> {
self.inner.seek(pos)
}
}
#[cfg(test)]
mod tests {
use partial_io::{PartialOp, PartialRead, PartialWrite};
use std::io::BufReader;
use super::*;
#[test]
fn reads() {
let input = &b"Read test"[..];
let ops = vec![PartialOp::Err(ErrorKind::Interrupted)];
let mut reader = Retry::new(PartialRead::new(input, ops));
let mut out = vec![0u8; input.len()];
assert_eq!(reader.read(&mut out).unwrap(), input.len());
assert_eq!(&out[..], input);
}
#[test]
fn reads_buffered() {
let input = &b"Read test"[..];
let ops = vec![PartialOp::Err(ErrorKind::Interrupted)];
let mut reader = Retry::new(BufReader::with_capacity(input.len(),
PartialRead::new(input, ops)));
assert_eq!(reader.fill_buf().unwrap(), input);
}
#[test]
fn writes() {
let input = &b"Write test"[..];
let ops = vec![PartialOp::Err(ErrorKind::Interrupted)];
let mut writer = Retry::new(PartialWrite::new(Vec::<u8>::new(), ops));
assert_eq!(writer.write(input).unwrap(), input.len());
assert_eq!(&writer.into_inner().into_inner()[..], input);
}
}