Struct ParsedExifEntry

pub struct ParsedExifEntry { /* private fields */ }

Represents a parsed IFD entry. Used as iterator items in ExifIter.

Implementations

impl ParsedExifEntry

pub fn ifd_index(&self) -> usize

Get the IFD index value where this entry is located.

• 0: ifd0 (main image)
• 1: ifd1 (thumbnail)

pub fn tag(&self) -> Option<ExifTag>

Get recognized Exif tag of this entry, maybe return None if the tag is unrecognized.

If you have any custom defined tag which does not exist in ExifTag, then you should use Self::tag_code to get the raw tag code.

Note: You can always get the raw tag code via Self::tag_code, no matter if it’s recognized.

pub fn tag_code(&self) -> u16

Get the raw tag code of this entry.

In case you have some custom defined tags which doesn’t exist in ExifTag, you can use this method to get the raw tag code of this entry.

pub fn has_value(&self) -> bool

Returns true if there is an EntryValue in self.

Both of the following situations may cause this method to return false:

• An error occurred while parsing this entry
• The value has been taken by calling Self::take_value or Self::take_result methods.

pub fn get_value(&self) -> Option<&EntryValue>

Get the parsed entry value of this entry.

pub fn take_value(&mut self) -> Option<EntryValue>

Takes out the parsed entry value of this entry.

If you need to convert this ExifIter to an crate::Exif, please don’t call this method! Otherwise the converted Exif is incomplete.

Note: This method can only be called once! Once it has been called, calling it again always returns None. You may want to check it by calling Self::has_value before calling this method.

pub fn get_result(&self) -> Result<&EntryValue, &EntryError>

Get the parsed result of this entry.

Returns:

• If any error occurred while parsing this entry, an Err(&[EntryError]) is returned.

• Otherwise, an Ok(&EntryValue) is returned.

pub fn take_result(&mut self) -> Result<EntryValue, EntryError>

Takes out the parsed result of this entry.

If you need to convert this ExifIter to an crate::Exif, please don’t call this method! Otherwise the converted Exif is incomplete.

Returns:

• If any error occurred while parsing this entry, an Err(InvalidEntry) is returned.

• Otherwise, an Ok(EntryValue) is returned.

Note: This method can ONLY be called once! If you call it twice, it will panic directly!

Trait Implementations

impl Clone for ParsedExifEntry

fn clone(&self) -> ParsedExifEntry

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParsedExifEntry

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

Formats the value using the given formatter.