littlefs_rust/
error.rs

1use core::fmt;
2use littlefs_rust_core::{
3    LFS_ERR_CORRUPT, LFS_ERR_EXIST, LFS_ERR_INVAL, LFS_ERR_IO, LFS_ERR_ISDIR, LFS_ERR_NAMETOOLONG,
4    LFS_ERR_NOATTR, LFS_ERR_NOENT, LFS_ERR_NOMEM, LFS_ERR_NOSPC, LFS_ERR_NOTDIR, LFS_ERR_NOTEMPTY,
5};
6
7/// LittleFS operation error.
8#[derive(Debug, Clone, Copy, PartialEq, Eq)]
9pub enum Error {
10    Io,
11    Corrupt,
12    NoEntry,
13    Exists,
14    NotDir,
15    IsDir,
16    NotEmpty,
17    Invalid,
18    NoSpace,
19    NoMemory,
20    NoAttribute,
21    NameTooLong,
22}
23
24impl fmt::Display for Error {
25    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
26        match self {
27            Error::Io => write!(f, "I/O error"),
28            Error::Corrupt => write!(f, "filesystem corrupt"),
29            Error::NoEntry => write!(f, "no such file or directory"),
30            Error::Exists => write!(f, "file or directory already exists"),
31            Error::NotDir => write!(f, "not a directory"),
32            Error::IsDir => write!(f, "is a directory"),
33            Error::NotEmpty => write!(f, "directory not empty"),
34            Error::Invalid => write!(f, "invalid parameter"),
35            Error::NoSpace => write!(f, "no space left on device"),
36            Error::NoMemory => write!(f, "out of memory"),
37            Error::NoAttribute => write!(f, "no such attribute"),
38            Error::NameTooLong => write!(f, "name too long"),
39        }
40    }
41}
42
43#[cfg(feature = "std")]
44impl std::error::Error for Error {}
45
46impl From<i32> for Error {
47    fn from(code: i32) -> Self {
48        match code {
49            c if c == LFS_ERR_IO => Error::Io,
50            c if c == LFS_ERR_CORRUPT => Error::Corrupt,
51            c if c == LFS_ERR_NOENT => Error::NoEntry,
52            c if c == LFS_ERR_EXIST => Error::Exists,
53            c if c == LFS_ERR_NOTDIR => Error::NotDir,
54            c if c == LFS_ERR_ISDIR => Error::IsDir,
55            c if c == LFS_ERR_NOTEMPTY => Error::NotEmpty,
56            c if c == LFS_ERR_INVAL => Error::Invalid,
57            c if c == LFS_ERR_NOSPC => Error::NoSpace,
58            c if c == LFS_ERR_NOMEM => Error::NoMemory,
59            c if c == LFS_ERR_NOATTR => Error::NoAttribute,
60            c if c == LFS_ERR_NAMETOOLONG => Error::NameTooLong,
61            _ => panic!("unknown LFS error code: {}", code),
62        }
63    }
64}
65
66pub(crate) fn from_lfs_result(code: i32) -> Result<(), Error> {
67    if code == 0 {
68        Ok(())
69    } else {
70        Err(Error::from(code))
71    }
72}
73
74pub(crate) fn from_lfs_size(code: i32) -> Result<u32, Error> {
75    if code >= 0 {
76        Ok(code as u32)
77    } else {
78        Err(Error::from(code))
79    }
80}
littlefs_rust/error.rs

littlefs_rust/
error.rs
