Struct discid::Features

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pub struct Features { /* private fields */ }

Expand description

Constants representing the features supported by libdiscid.

See DiscId::read_features for details.

Implementations§

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impl Features

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pub const READ: Self = _

Read the CD TOC.

This is supported on all platforms and indicates that only the table of contents (TOC), from which the disc ID gets calculated, will be read.

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pub const MCN: Self = _

Read the MCN (aka barcode) information.

Read the MCN field from the CD. Not all CDs provide this information. Without this feature DiscId::mcn will always return an empty string.

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pub const ISRC: Self = _

Supports reading the ISRCs per track.

For each track read the ISRC encoded in the subchannel data. Not all CDs provide this information. Without this feature Track::isrc will always be an empty string.

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pub const fn empty() -> Self

Returns an empty set of flags.

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pub const fn all() -> Self

Returns the set containing all flags.

Examples found in repository ?

examples/readdiscid.rs (line 12)

fn main() {
    // Read the device name from the command line or use the default.
    let arg1 = env::args().nth(1).unwrap_or_default();
    let device = if !arg1.is_empty() {
        Some(&arg1[..])
    } else {
        None
    };
    let result = DiscId::read_features(device, Features::all());

    match result {
        Ok(disc) => print_disc_info(disc),
        Err(e) => {
            eprintln!("{}", e);
            std::process::exit(1);
        }
    }
}

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pub const fn bits(&self) -> u32

Returns the raw value of the flags currently stored.

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pub const fn from_bits(bits: u32) -> Option<Self>

Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.

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pub const fn from_bits_truncate(bits: u32) -> Self

Convert from underlying bit representation, dropping any bits that do not correspond to flags.

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pub const unsafe fn from_bits_unchecked(bits: u32) -> Self

Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).

Safety

The caller of the bitflags! macro can chose to allow or disallow extra bits for their bitflags type.

The caller of from_bits_unchecked() has to ensure that all bits correspond to a defined flag or that extra bits are valid for this bitflags type.

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pub const fn is_empty(&self) -> bool

Returns true if no flags are currently stored.

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pub const fn is_all(&self) -> bool

Returns true if all flags are currently set.

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pub const fn intersects(&self, other: Self) -> bool

Returns true if there are flags common to both self and other.

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pub const fn contains(&self, other: Self) -> bool

Returns true if all of the flags in other are contained within self.

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pub fn insert(&mut self, other: Self)

Inserts the specified flags in-place.

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pub fn remove(&mut self, other: Self)

Removes the specified flags in-place.

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pub fn toggle(&mut self, other: Self)

Toggles the specified flags in-place.

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pub fn set(&mut self, other: Self, value: bool)

Inserts or removes the specified flags depending on the passed value.

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pub const fn intersection(self, other: Self) -> Self

Returns the intersection between the flags in self and other.

Specifically, the returned set contains only the flags which are present in both self and other.

This is equivalent to using the & operator (e.g. ops::BitAnd), as in flags & other.

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pub const fn union(self, other: Self) -> Self

Returns the union of between the flags in self and other.

Specifically, the returned set contains all flags which are present in either self or other, including any which are present in both (see Self::symmetric_difference if that is undesirable).

This is equivalent to using the | operator (e.g. ops::BitOr), as in flags | other.

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pub const fn difference(self, other: Self) -> Self

Returns the difference between the flags in self and other.

Specifically, the returned set contains all flags present in self, except for the ones present in other.

It is also conceptually equivalent to the “bit-clear” operation: flags & !other (and this syntax is also supported).

This is equivalent to using the - operator (e.g. ops::Sub), as in flags - other.

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pub const fn symmetric_difference(self, other: Self) -> Self

Returns the symmetric difference between the flags in self and other.

Specifically, the returned set contains the flags present which are present in self or other, but that are not present in both. Equivalently, it contains the flags present in exactly one of the sets self and other.

This is equivalent to using the ^ operator (e.g. ops::BitXor), as in flags ^ other.

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