/rust/registry/src/index.crates.io-1949cf8c6b5b557f/jpeg-encoder-0.7.0/src/error.rs

Source
use alloc::fmt::Display;
use core::error::Error;

/// # The error type for encoding
#[derive(Debug)]
pub enum EncodingError {
    /// An invalid app segment number has been used
    InvalidAppSegment(u8),

    /// App segment exceeds maximum allowed data length
    AppSegmentTooLarge(usize),

    /// Color profile exceeds maximum allowed data length
    IccTooLarge(usize),

    /// Image data is too short
    BadImageData { length: usize, required: usize },

    /// Width or height is zero
    ZeroImageDimensions { width: u16, height: u16 },

    /// An io error occurred during writing
    #[cfg(feature = "std")]
    IoError(std::io::Error),

    /// An io error occurred during writing (Should be used in no_std cases instead of IoError)
    Write(alloc::string::String),
}

#[cfg(feature = "std")]
impl From<std::io::Error> for EncodingError {
    fn from(err: std::io::Error) -> EncodingError {
        EncodingError::IoError(err)
    }
}

impl Display for EncodingError {
    fn fmt(&self, f: &mut alloc::fmt::Formatter<'_>) -> alloc::fmt::Result {
        use EncodingError::*;
        match self {
            InvalidAppSegment(nr) => write!(f, "Invalid app segment number: {}", nr),
            AppSegmentTooLarge(length) => write!(
                f,
                "App segment exceeds maximum allowed data length of 65533: {}",
                length
            ),
            IccTooLarge(length) => write!(
                f,
                "ICC profile exceeds maximum allowed data length: {}",
                length
            ),
            BadImageData { length, required } => write!(
                f,
                "Image data too small for dimensions and color_type: {} need at least {}",
                length, required
            ),
            ZeroImageDimensions { width, height } => {
                write!(f, "Image dimensions must be non zero: {}x{}", width, height)
            }
            #[cfg(feature = "std")]
            IoError(err) => err.fmt(f),
            Write(err) => write!(f, "{}", err),
        }
    }
}

impl Error for EncodingError {
    #[cfg(feature = "std")]
    fn source(&self) -> Option<&(dyn Error + 'static)> {
        match self {
            EncodingError::IoError(err) => Some(err),
            _ => None,
        }
    }
}

Coverage Report

Created: 2026-03-07 07:19

Line	Count	Source
1		use alloc::fmt::Display;
2		use core::error::Error;
3
4		/// # The error type for encoding
5		#[derive(Debug)]
6		pub enum EncodingError {
7		/// An invalid app segment number has been used
8		InvalidAppSegment(u8),
9
10		/// App segment exceeds maximum allowed data length
11		AppSegmentTooLarge(usize),
12
13		/// Color profile exceeds maximum allowed data length
14		IccTooLarge(usize),
15
16		/// Image data is too short
17		BadImageData { length: usize, required: usize },
18
19		/// Width or height is zero
20		ZeroImageDimensions { width: u16, height: u16 },
21
22		/// An io error occurred during writing
23		#[cfg(feature = "std")]
24		IoError(std::io::Error),
25
26		/// An io error occurred during writing (Should be used in no_std cases instead of IoError)
27		Write(alloc::string::String),
28		}
29
30		#[cfg(feature = "std")]
31		impl From<std::io::Error> for EncodingError {
32	0	fn from(err: std::io::Error) -> EncodingError {
33	0	EncodingError::IoError(err)
34	0	}
35		}
36
37		impl Display for EncodingError {
38	0	fn fmt(&self, f: &mut alloc::fmt::Formatter<'_>) -> alloc::fmt::Result {
39		use EncodingError::*;
40	0	match self {
41	0	InvalidAppSegment(nr) => write!(f, "Invalid app segment number: {}", nr),
42	0	AppSegmentTooLarge(length) => write!(
43	0	f,
44	0	"App segment exceeds maximum allowed data length of 65533: {}",
45		length
46		),
47	0	IccTooLarge(length) => write!(
48	0	f,
49	0	"ICC profile exceeds maximum allowed data length: {}",
50		length
51		),
52	0	BadImageData { length, required } => write!(
53	0	f,
54	0	"Image data too small for dimensions and color_type: {} need at least {}",
55		length, required
56		),
57	0	ZeroImageDimensions { width, height } => {
58	0	write!(f, "Image dimensions must be non zero: {}x{}", width, height)
59		}
60		#[cfg(feature = "std")]
61	0	IoError(err) => err.fmt(f),
62	0	Write(err) => write!(f, "{}", err),
63		}
64	0	}
65		}
66
67		impl Error for EncodingError {
68		#[cfg(feature = "std")]
69	0	fn source(&self) -> Option<&(dyn Error + 'static)> {
70	0	match self {
71	0	EncodingError::IoError(err) => Some(err),
72	0	_ => None,
73		}
74	0	}
75		}