[−][src]Enum rexif::TagValue
Tag value enumeration. It works as a variant type. Each value is actually a vector because many EXIF tags are collections of values. Exif tags with single values are represented as single-item vectors.
Variants
U8(Vec<u8>)
Array of unsigned byte integers
Ascii(String)
ASCII string. (The standard specifies 7-bit ASCII, but this parser accepts UTF-8 strings.)
U16(Vec<u16>)
U32(Vec<u32>)
URational(Vec<URational>)
Array of URational
structures (tuples with integer numerator and denominator)
I8(Vec<i8>)
Undefined(Vec<u8>, bool)
Array of bytes with opaque internal structure. Used by manufacturer-specific tags, SIG-specific tags, tags that contain Unicode (UCS-2) or Japanese (JIS) strings (i.e. strings that are not 7-bit-clean), tags that contain dissimilar or variant types, etc.
This item has a "little endian" boolean parameter that reports the whole TIFF's endianness. Any sort of internal structure that is sensitive to endianess should be interpreted accordignly to this parameter (true=LE, false=BE).
I16(Vec<i16>)
I32(Vec<i32>)
IRational(Vec<IRational>)
Array of IRational
structures (tuples with signed integer numerator and denominator)
F32(Vec<f32>)
Array of IEEE 754 floating-points
F64(Vec<f64>)
Array of IEEE 754 floating-points
Unknown(Vec<u8>, bool)
Array of bytes with unknown internal structure.
This is different from Undefined
because Undefined
is actually a specified
format, while Unknown
is an unexpected format type. A tag of Unknown
format
is most likely a corrupted tag.
This variant has a "little endian" boolean parameter that reports the whole TIFF's endianness. Any sort of internal structure that is sensitive to endianess should be interpreted accordignly to this parameter (true=LE, false=BE).
Invalid(Vec<u8>, bool, u16, u32)
Type that could not be parsed due to some sort of error (e.g. buffer too short for the count and type size). Variant contains raw data, LE/BE, format (as u16) and count.
Methods
impl TagValue
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pub fn to_i64(&self, index: usize) -> Option<i64>
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Get value as an integer
Out of bounds indexes and invalid types return None
pub fn to_f64(&self, index: usize) -> Option<f64>
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Get value as a floating-point number
Out of bounds indexes and invalid types return None
Trait Implementations
impl Clone for TagValue
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fn clone(&self) -> TagValue
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fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl Display for TagValue
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impl Debug for TagValue
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Auto Trait Implementations
impl Sync for TagValue
impl Send for TagValue
impl Unpin for TagValue
impl RefUnwindSafe for TagValue
impl UnwindSafe for TagValue
Blanket Implementations
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,