Enum ContainerError 

pub enum ContainerError {
    TooShortForHeader {
        got: usize,
    },
    NotRiff {
        got: FourCc,
    },
    NotWebp {
        got: FourCc,
    },
    RiffSizeOverflowsBuffer {
        declared: u32,
        buffer_len: usize,
    },
    TruncatedChunkHeader {
        offset: usize,
    },
    ChunkPayloadOverflowsRiff {
        offset: usize,
        declared: u32,
        available: usize,
    },
    MissingPadByte {
        offset: usize,
    },
}

Errors raised by the RIFF/WEBP walker. The walker reports the first structural problem it sees and stops — it is not a recovery layer.

Variants

TooShortForHeader

The buffer is shorter than the 12-byte §2.4 file header.

Fields

got: usize

NotRiff

Bytes 0..4 are not the ASCII tag RIFF.

Fields

got: FourCc

NotWebp

Bytes 8..12 are not the ASCII tag WEBP.

Fields

got: FourCc

RiffSizeOverflowsBuffer

The §2.4 File Size field says the payload extends past the end of the buffer. The header File Size counts the WEBP FourCC plus everything after it.

Fields

declared: u32

File Size value as parsed from bytes 4..8.

buffer_len: usize

Total buffer length the walker was given.

TruncatedChunkHeader

A chunk header was truncated — the 8 bytes required to read FourCC + Size do not fit in what remains of the RIFF payload at offset.

Fields

offset: usize

Absolute offset (from the start of the buffer) where the truncated header begins.

ChunkPayloadOverflowsRiff

A chunk’s declared Size value runs past the end of the RIFF payload — i.e. payload Size bytes would extend beyond the region delimited by the outer §2.4 file header.

Fields

offset: usize

Absolute offset where the offending chunk’s header starts.

declared: u32

Size value as parsed from the chunk header.

available: usize

Number of payload bytes the walker actually had room for.

MissingPadByte

A chunk’s declared Size value is odd, and the §2.3 padding byte that would follow it is missing because there are no further bytes in the RIFF payload.

Fields

offset: usize

Absolute offset of the chunk header whose payload ends without its required pad byte.

Trait Implementations

impl Clone for ContainerError

fn clone(&self) -> ContainerError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ContainerError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ContainerError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for ContainerError

impl Error for ContainerError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<ContainerError> for Error

fn from(e: ContainerError) -> Self

Converts to this type from the input type.

impl PartialEq for ContainerError

fn eq(&self, other: &ContainerError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ContainerError