Struct ScanSegment

pub struct ScanSegment<'a> {
    pub specifier: &'a [u8],
    pub data: &'a [u8],
}

A Scan Segment is contains a segment of the JPEG data.

Fields

specifier: &'a [u8]

Specifies which segment is encoded following this specifier.

data: &'a [u8]

The actual entropy-encoded data that makes up the image segment.

Implementations

impl<'a> ScanSegment<'a>

pub fn parser<I>() -> impl Parser<Input = I, Output = ScanSegment<'a>> + 'a

where I: RangeStream<Item = u8, Range = &'a [u8]> + 'a, I::Error: ParseError<I::Item, I::Range, I::Position>,

Parses out a Scan Segment, including the entropy-encoded data.

use exifsd::*;
use combine::*;

let input = &[0xFF, 0xDA, 0x00, 0x02, 0x01, 0xFF, 0x00, 0x02, 0xFF, 0xFF, 0xD9][..];
let result = ScanSegment::parser().parse(input);
let expected = ScanSegment { specifier: &[], data: &[0x01, 0xFF, 0x00, 0x02, 0xFF] };

// Note that the marker `[0xFF, 0xD9]` is not consumed.
assert_eq!(result, Ok((expected, &[0xFF, 0xD9][..])));

pub fn write<W: WriteBytesExt>(&self, writer: &mut W) -> Result<()>

Writes the binary representation of the ScanSegment out to a file.

use exifsd::*;
use combine::*;

let input = &[0xFF, 0xDA, 0x00, 0x02, 0x01, 0xFF, 0x00, 0x02][..];
let scan_segment = ScanSegment::parser().parse(input).unwrap().0;
let mut written = vec![];
scan_segment.write(&mut written).unwrap();
assert_eq!(input, &written[..]);

Trait Implementations

impl<'a> Clone for ScanSegment<'a>

fn clone(&self) -> ScanSegment<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for ScanSegment<'a>

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

Formats the value using the given formatter.

impl<'a> PartialEq for ScanSegment<'a>

fn eq(&self, other: &ScanSegment<'a>) -> 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<'a> Copy for ScanSegment<'a>

impl<'a> Eq for ScanSegment<'a>

impl<'a> StructuralPartialEq for ScanSegment<'a>