Enum Error 

pub enum Error {
    TooShortBuffer {
        actual: usize,
        expected: usize,
        file: &'static str,
        line: u32,
    },
    FileIdentifierError(String),
    FileVersioningError(String),
    BlockIDError {
        actual: String,
        expected: String,
    },
    IOError(Error),
    InvalidVersionString(String),
    BlockLinkError(String),
    BlockSerializationError(String),
    ConversionChainTooDeep {
        max_depth: usize,
    },
    ConversionChainCycle {
        address: u64,
    },
}

Errors that can occur during MDF file operations.

This enum covers all failure modes including I/O errors, parsing failures, and structural issues in the MDF file.

Variants

TooShortBuffer

Buffer provided for parsing was too small.

This typically indicates file corruption or an incomplete read.

Fields

actual: usize

Actual number of bytes available

expected: usize

Minimum number of bytes required

file: &'static str

Source file where the error was detected

line: u32

Line number where the error was detected

FileIdentifierError(String)

The file identifier is not “MDF “ as required by the specification.

This can occur when trying to open a non-MDF file or a file using an unsupported variant like “UnFinMF” (unfinalized MDF).

FileVersioningError(String)

The MDF version is not supported (requires 4.1 or later).

BlockIDError

A block identifier did not match the expected value.

Each MDF block starts with a 4-character identifier (e.g., “##HD” for the header block). This error indicates structural corruption.

Fields

actual: String

The identifier that was found

expected: String

The identifier that was expected

IOError(Error)

An I/O error occurred while reading or writing the file.

Only available with the std feature.

InvalidVersionString(String)

The version string in the identification block could not be parsed.

BlockLinkError(String)

Failed to link blocks together during file writing.

This typically indicates a programming error where blocks are referenced before being written.

BlockSerializationError(String)

Failed to serialize a block to bytes.

ConversionChainTooDeep

A conversion chain exceeded the maximum allowed depth.

MDF supports chained conversions where one conversion references another. This error prevents infinite loops from malformed files.

Fields

max_depth: usize

The maximum depth that was exceeded

ConversionChainCycle

A cycle was detected in a conversion chain.

This indicates file corruption where conversion blocks form a loop.

Fields

address: u64

The address where the cycle was detected

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

Available on crate feature std only.

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<Error> for Error

Available on crate feature std only.

fn from(err: Error) -> Self

Converts to this type from the input type.