/rust/registry/src/index.crates.io-1949cf8c6b5b557f/jpeg-encoder-0.6.1/src/error.rs

Source
use alloc::fmt::Display;
#[cfg(feature = "std")]
use std::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),
        }
    }
}

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

Coverage Report

Created: 2025-11-24 07:30

Line	Count	Source
1		use alloc::fmt::Display;
2		#[cfg(feature = "std")]
3		use std::error::Error;
4
5		/// # The error type for encoding
6		#[derive(Debug)]
7		pub enum EncodingError {
8		/// An invalid app segment number has been used
9		InvalidAppSegment(u8),
10
11		/// App segment exceeds maximum allowed data length
12		AppSegmentTooLarge(usize),
13
14		/// Color profile exceeds maximum allowed data length
15		IccTooLarge(usize),
16
17		/// Image data is too short
18		BadImageData { length: usize, required: usize },
19
20		/// Width or height is zero
21		ZeroImageDimensions { width: u16, height: u16 },
22
23		/// An io error occurred during writing
24		#[cfg(feature = "std")]
25		IoError(std::io::Error),
26
27		/// An io error occurred during writing (Should be used in no_std cases instead of IoError)
28		Write(alloc::string::String),
29		}
30
31		#[cfg(feature = "std")]
32		impl From<std::io::Error> for EncodingError {
33	0	fn from(err: std::io::Error) -> EncodingError {
34	0	EncodingError::IoError(err)
35	0	}
36		}
37
38		impl Display for EncodingError {
39	0	fn fmt(&self, f: &mut alloc::fmt::Formatter<'_>) -> alloc::fmt::Result {
40		use EncodingError::*;
41	0	match self {
42	0	InvalidAppSegment(nr) => write!(f, "Invalid app segment number: {}", nr),
43	0	AppSegmentTooLarge(length) => write!(
44	0	f,
45	0	"App segment exceeds maximum allowed data length of 65533: {}",
46		length
47		),
48	0	IccTooLarge(length) => write!(
49	0	f,
50	0	"ICC profile exceeds maximum allowed data length: {}",
51		length
52		),
53	0	BadImageData { length, required } => write!(
54	0	f,
55	0	"Image data too small for dimensions and color_type: {} need at least {}",
56		length, required
57		),
58	0	ZeroImageDimensions { width, height } => {
59	0	write!(f, "Image dimensions must be non zero: {}x{}", width, height)
60		}
61		#[cfg(feature = "std")]
62	0	IoError(err) => err.fmt(f),
63	0	Write(err) => write!(f, "{}", err),
64		}
65	0	}
66		}
67
68		#[cfg(feature = "std")]
69		impl Error for EncodingError {
70	0	fn source(&self) -> Option<&(dyn Error + 'static)> {
71	0	match self {
72	0	EncodingError::IoError(err) => Some(err),
73	0	_ => None,
74		}
75	0	}
76		}