unit_rs/
error.rs

1use crate::nxt_unit;
2
3/// Error code returned when Unit could not be initialized.
4#[derive(Debug, Clone, Copy)]
5pub struct UnitInitError;
6
7/// Error code returned by the Unit library.
8pub struct UnitError(pub(crate) i32);
9
10impl UnitError {
11    pub fn error() -> Self {
12        Self(nxt_unit::NXT_UNIT_ERROR as i32)
13    }
14}
15
16/// Result type returned from methods that have a [`UnitError`](UnitError)
17/// error.
18pub type UnitResult<T> = Result<T, UnitError>;
19
20pub(crate) trait IntoUnitResult {
21    fn into_unit_result(self) -> UnitResult<()>;
22}
23
24impl IntoUnitResult for i32 {
25    fn into_unit_result(self) -> UnitResult<()> {
26        if self == 0 {
27            Ok(())
28        } else {
29            Err(UnitError(self))
30        }
31    }
32}
33
34impl std::error::Error for UnitError {}
35
36impl std::fmt::Debug for UnitError {
37    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
38        let mut debug_tuple = f.debug_tuple("UnitError");
39
40        debug_tuple.field(&match self.0 as u32 {
41            nxt_unit::NXT_UNIT_OK => "Successful",
42            nxt_unit::NXT_UNIT_AGAIN => "Again",
43            nxt_unit::NXT_UNIT_CANCELLED => "Cancelled",
44            nxt_unit::NXT_UNIT_ERROR => "Error",
45            _ => "Unknown",
46        });
47        debug_tuple.finish()
48    }
49}
50
51impl std::fmt::Display for UnitError {
52    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
53        match self.0 as u32 {
54            nxt_unit::NXT_UNIT_OK => "Unit error code: Successful.".fmt(f),
55            nxt_unit::NXT_UNIT_AGAIN => "Unit error code: Not yet available, try again.".fmt(f),
56            nxt_unit::NXT_UNIT_CANCELLED => "Unit error code: Cancelled.".fmt(f),
57            nxt_unit::NXT_UNIT_ERROR => "Unit error code: General error.".fmt(f),
58            _ => write!(f, "Unknown Unit error code: {}.", self.0),
59        }
60    }
61}
unit_rs/error.rs

unit_rs/
error.rs
