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
use std::fmt;
use std::error::Error as StdError;
use std::result::Result as StdResult;
use libc::c_int;
use libusb::*;
pub type Result<T> = StdResult<T, Error>;
#[derive(Debug)]
pub enum Error {
Success,
Io,
InvalidParam,
Access,
NoDevice,
NotFound,
Busy,
Timeout,
Overflow,
Pipe,
Interrupted,
NoMem,
NotSupported,
Other
}
impl Error {
pub fn strerror(&self) -> &'static str {
match *self {
Error::Success => "Success",
Error::Io => "Input/Output Error",
Error::InvalidParam => "Invalid parameter",
Error::Access => "Access denied (insufficient permissions)",
Error::NoDevice => "No such device (it may have been disconnected)",
Error::NotFound => "Entity not found",
Error::Busy => "Resource busy",
Error::Timeout => "Operation timed out",
Error::Overflow => "Overflow",
Error::Pipe => "Pipe error",
Error::Interrupted => "System call interrupted (perhaps due to signal)",
Error::NoMem => "Insufficient memory",
Error::NotSupported => "Operation not supported or unimplemented on this platform",
Error::Other => "Other error",
}
}
}
impl fmt::Display for Error {
fn fmt(&self, fmt: &mut fmt::Formatter) -> StdResult<(), fmt::Error> {
fmt.write_str(self.strerror())
}
}
impl StdError for Error {
fn description(&self) -> &'static str {
self.strerror()
}
}
#[doc(hidden)]
pub fn from_libusb(err: c_int) -> Error {
match err {
LIBUSB_SUCCESS => Error::Success,
LIBUSB_ERROR_IO => Error::Io,
LIBUSB_ERROR_INVALID_PARAM => Error::InvalidParam,
LIBUSB_ERROR_ACCESS => Error::Access,
LIBUSB_ERROR_NO_DEVICE => Error::NoDevice,
LIBUSB_ERROR_NOT_FOUND => Error::NotFound,
LIBUSB_ERROR_BUSY => Error::Busy,
LIBUSB_ERROR_TIMEOUT => Error::Timeout,
LIBUSB_ERROR_OVERFLOW => Error::Overflow,
LIBUSB_ERROR_PIPE => Error::Pipe,
LIBUSB_ERROR_INTERRUPTED => Error::Interrupted,
LIBUSB_ERROR_NO_MEM => Error::NoMem,
LIBUSB_ERROR_NOT_SUPPORTED => Error::NotSupported,
LIBUSB_ERROR_OTHER | _ => Error::Other,
}
}
#[doc(hidden)]
macro_rules! try_unsafe {
($x:expr) => {
match unsafe { $x } {
0 => (),
err => return Err($crate::error::from_libusb(err)),
}
}
}