Enum FormatSpec

pub enum FormatSpec {
    Fixed(BinaryDataFormat),
    Array {
        base_format: BinaryDataFormat,
        count_expr: String,
    },
    StringWithLength {
        length_expr: String,
    },
}

Format specification that may contain expressions ExifTool: Format with expressions like “int16s[$val{0}]”

Variants

Fixed(BinaryDataFormat)

Fixed format without expressions

Array

Variable format with expression for count ExifTool: “int16s[$val{0}]” -> Array { base: Int16s, count_expr: “$val{0}” }

Fields

base_format: BinaryDataFormat

count_expr: String

StringWithLength

Variable-length string with expression for length ExifTool: “string[$val{3}]” -> StringWithLength { length_expr: “$val{3}” }

Fields

length_expr: String

Implementations

impl FormatSpec

pub fn parse(format_str: &str) -> Result<Self, ExifError>

Parse format specification from string ExifTool: lib/Image/ExifTool.pm:9850-9856 format parsing with expressions

pub fn needs_evaluation(&self) -> bool

Check if this format spec contains expressions that need evaluation

Trait Implementations

impl Clone for FormatSpec

fn clone(&self) -> FormatSpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FormatSpec

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

Formats the value using the given formatter.

impl PartialEq for FormatSpec

fn eq(&self, other: &FormatSpec) -> 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 Eq for FormatSpec

impl StructuralPartialEq for FormatSpec