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#[repr(transparent)]
pub struct ByteUnit(_);
Expand description

A unit of bytes with saturating const constructors and arithmetic.

Overview

A ByteUnit represents a unit, a count, a number, of bytes. All operations on a ByteUnit – constructors, arithmetic, conversions – saturate. Overflow, underflow, and divide-by-zero are impossible. See the top-level documentation for more.

ToByteUnit provides human-friendly methods on all integer types for converting into a ByteUnit: 512.megabytes().

Parsing

ByteUnit implements FromStr for parsing byte unit strings into a ByteUnit. The grammar accepted by the parser is:

byte_unit := uint+ ('.' uint+)? WHITESPACE* suffix

uint := '0'..'9'
suffix := case insensitive SI byte unit suffix ('b' to 'eib')
WHITESPACE := the ' ' character
use ubyte::{ByteUnit, ToByteUnit};

let one_gib: ByteUnit = "1GiB".parse().unwrap();
assert_eq!(one_gib, 1.gibibytes());

let quarter_mb: ByteUnit = "256 kB".parse().unwrap();
assert_eq!(quarter_mb, 256.kilobytes());

let half_mb: ByteUnit = "0.5MB".parse().unwrap();
assert_eq!(half_mb, 500.kilobytes());

let half_mib: ByteUnit = "0.500 mib".parse().unwrap();
assert_eq!(half_mib, 512.kibibytes());

let some_mb: ByteUnit = "20.5MB".parse().unwrap();
assert_eq!(some_mb, 20.megabytes() + 500.kilobytes());

(De)serialization

With the serde feaure enabled (disabled by default), ByteUnit implements Deserialize from strings, using the same grammar as the FromStr implementation, defined above, as well as all integer types. The Serialize implementation serializes into a u64.

Example

use ubyte::{ByteUnit, ToByteUnit};

// Construct with unit-valued associated constants, `const` constructors, or
// human-friendly methods from the `ToByteUnit` integer extension trait.
const HALF_GB: ByteUnit = ByteUnit::Megabyte(500);
const HALF_GIB: ByteUnit = ByteUnit::Mebibyte(512);
let half_gb = 500 * ByteUnit::MB;
let half_gib = 512 * ByteUnit::MiB;
let half_gb = 500.megabytes();
let half_gib = 512.mebibytes();

// All arithmetic operations and conversions saturate.
let exbibyte = ByteUnit::Exbibyte(1);
let exbibyte_too_large_a = 1024 * ByteUnit::EiB;
let exbibyte_too_large_b = ByteUnit::Exbibyte(1024);
let exbibyte_too_large_c = 1024.exbibytes();
let div_by_zero = 1024.exbibytes() / 0;
let too_small = 1000.megabytes() - 1.gibibytes();
assert_eq!(exbibyte << 4, ByteUnit::max_value());
assert_eq!(exbibyte << 10, ByteUnit::max_value());
assert_eq!(exbibyte_too_large_a, ByteUnit::max_value());
assert_eq!(exbibyte_too_large_b, ByteUnit::max_value());
assert_eq!(exbibyte_too_large_c, ByteUnit::max_value());
assert_eq!(div_by_zero, ByteUnit::max_value());
assert_eq!(too_small, 0);

Implementations

Number of bytes in 1 B (1).

Number of bytes in 1 kB (1_000).

Number of bytes in 1 KiB (1 << 10).

Number of bytes in 1 MB (1_000_000).

Number of bytes in 1 MiB (1 << 20).

Number of bytes in 1 GB (1_000_000_000).

Number of bytes in 1 GiB (1 << 30).

Number of bytes in 1 TB (1_000_000_000_000).

Number of bytes in 1 TiB (1 << 40).

Number of bytes in 1 PB (1_000_000_000_000_000).

Number of bytes in 1 PiB (1 << 50).

Number of bytes in 1 EB (1_000_000_000_000_000_000).

Number of bytes in 1 EiB (1 << 60).

Constructs a ByteUnit representing n B .

Example
assert_eq!(ByteUnit::Byte(10), 10 * ByteUnit::B);

Constructs a ByteUnit representing n kB .

Example
assert_eq!(ByteUnit::Kilobyte(10), 10 * ByteUnit::kB);

Constructs a ByteUnit representing n KiB .

Example
assert_eq!(ByteUnit::Kibibyte(10), 10 * ByteUnit::KiB);

Constructs a ByteUnit representing n MB .

Example
assert_eq!(ByteUnit::Megabyte(10), 10 * ByteUnit::MB);

Constructs a ByteUnit representing n MiB .

Example
assert_eq!(ByteUnit::Mebibyte(10), 10 * ByteUnit::MiB);

Constructs a ByteUnit representing n GB .

Example
assert_eq!(ByteUnit::Gigabyte(10), 10 * ByteUnit::GB);

Constructs a ByteUnit representing n GiB .

Example
assert_eq!(ByteUnit::Gibibyte(10), 10 * ByteUnit::GiB);

Constructs a ByteUnit representing n TB .

Example
assert_eq!(ByteUnit::Terabyte(10), 10 * ByteUnit::TB);

Constructs a ByteUnit representing n TiB .

Example
assert_eq!(ByteUnit::Tebibyte(10), 10 * ByteUnit::TiB);

Constructs a ByteUnit representing n PB .

Example
assert_eq!(ByteUnit::Petabyte(10), 10 * ByteUnit::PB);

Constructs a ByteUnit representing n PiB .

Example
assert_eq!(ByteUnit::Pebibyte(10), 10 * ByteUnit::PiB);

Constructs a ByteUnit representing n EB .

Example
assert_eq!(ByteUnit::Exabyte(10), 10 * ByteUnit::EB);

Constructs a ByteUnit representing n EiB .

Example
assert_eq!(ByteUnit::Exbibyte(10), 10 * ByteUnit::EiB);

The maximum value of bytes representable by ByteUnit.

Example
assert_eq!(ByteUnit::max_value(), u64::max_value());

Returns the value of bytes represented by self as a u64.

Example
let int: u64 = ByteUnit::Gigabyte(4).as_u64();
assert_eq!(int, 4 * ByteUnit::GB);

assert_eq!(ByteUnit::Megabyte(42).as_u64(), 42 * 1_000_000);
assert_eq!(ByteUnit::Exbibyte(7).as_u64(), 7 * 1 << 60);

Returns the value of bytes represented by self as a u128.

Example
let int: u128 = ByteUnit::Gigabyte(4).as_u128();
assert_eq!(int, 4 * ByteUnit::GB);

assert_eq!(ByteUnit::Megabyte(42).as_u64(), 42 * 1_000_000);
assert_eq!(ByteUnit::Exbibyte(7).as_u64(), 7 * 1 << 60);

Returns the components of the minimal unit representation of self.

The “minimal unit representation” is the representation that maximizes the SI-unit while minimizing the whole part of the value. For example, 1024.bytes() is minimally represented by 1KiB, while 1023.bytes() is minimally represented by 1.023kB.

The four components returned, in tuple-order, are:

  • whole - the whole part of the minimal representation.
  • frac - the fractional part of the minimal representation.
  • suffix - the suffix of the minimal representation.
  • unit - the 1-unit of the minimal representation.

Succinctly, this is: (whole, frac, suffix, unit). Observe that `(whole

  • frac) * unit` reconstructs the original value.
Example
use ubyte::{ByteUnit, ToByteUnit};

let value = 2.mebibytes() + 512.kibibytes();
assert_eq!(value.to_string(), "2.50MiB");

let (whole, frac, suffix, unit) = value.repr();
assert_eq!(whole, 2);
assert_eq!(frac, 0.5);
assert_eq!(suffix, "MiB");
assert_eq!(unit, ByteUnit::MiB);

let reconstructed = (whole as f64 + frac) * unit.as_u64() as f64;
assert_eq!(reconstructed as u64, value);

Trait Implementations

The resulting type after applying the + operator.

Performs the + operation. Read more

The resulting type after applying the + operator.

Performs the + operation. Read more

The resulting type after applying the + operator.

Performs the + operation. Read more

The resulting type after applying the + operator.

Performs the + operation. Read more

The resulting type after applying the + operator.

Performs the + operation. Read more

The resulting type after applying the + operator.

Performs the + operation. Read more

The resulting type after applying the + operator.

Performs the + operation. Read more

The resulting type after applying the + operator.

Performs the + operation. Read more

The resulting type after applying the + operator.

Performs the + operation. Read more

The resulting type after applying the + operator.

Performs the + operation. Read more

The resulting type after applying the + operator.

Performs the + operation. Read more

The resulting type after applying the + operator.

Performs the + operation. Read more

The resulting type after applying the + operator.

Performs the + operation. Read more

Performs the += operation. Read more

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Returns the “default value” for a type. Read more

Deserialize this value from the given Serde deserializer. Read more

Display self as best as possible. For perfectly custom display output, consider using ByteUnit::repr().

Example

use ubyte::{ByteUnit, ToByteUnit};

assert_eq!(323.kilobytes().to_string(), "323kB");
assert_eq!(3.megabytes().to_string(), "3MB");
assert_eq!(3.mebibytes().to_string(), "3MiB");

assert_eq!((3.mebibytes() + 140.kilobytes()).to_string(), "3.13MiB");
assert_eq!((3.mebibytes() + 2.mebibytes()).to_string(), "5MiB");
assert_eq!((7.gigabytes() + 58.mebibytes() + 3.kilobytes()).to_string(), "7.06GB");
assert_eq!((7.gibibytes() + 920.mebibytes()).to_string(), "7.90GiB");
assert_eq!(7231.kilobytes().to_string(), "6.90MiB");

assert_eq!(format!("{:.0}", 7.gibibytes() + 920.mebibytes()), "8GiB");
assert_eq!(format!("{:.1}", 7.gibibytes() + 920.mebibytes()), "7.9GiB");
assert_eq!(format!("{:.2}", 7.gibibytes() + 920.mebibytes()), "7.90GiB");
assert_eq!(format!("{:.3}", 7.gibibytes() + 920.mebibytes()), "7.898GiB");
assert_eq!(format!("{:.4}", 7.gibibytes() + 920.mebibytes()), "7.8984GiB");
assert_eq!(format!("{:.4}", 7231.kilobytes()), "6.8960MiB");
assert_eq!(format!("{:.0}", 7231.kilobytes()), "7MiB");
assert_eq!(format!("{:.2}", 999.kilobytes() + 990.bytes()), "976.55KiB");
assert_eq!(format!("{:.0}", 999.kilobytes() + 990.bytes()), "1MB");

assert_eq!(format!("{:04.2}", 999.kilobytes() + 990.bytes()), "0976.55KiB");
assert_eq!(format!("{:02.0}", 999.kilobytes() + 990.bytes()), "01MB");
assert_eq!(format!("{:04.0}", 999.kilobytes() + 990.bytes()), "0001MB");

Formats the value using the given formatter. Read more

The resulting type after applying the / operator.

Performs the / operation. Read more

The resulting type after applying the / operator.

Performs the / operation. Read more

The resulting type after applying the / operator.

Performs the / operation. Read more

The resulting type after applying the / operator.

Performs the / operation. Read more

The resulting type after applying the / operator.

Performs the / operation. Read more

The resulting type after applying the / operator.

Performs the / operation. Read more

The resulting type after applying the / operator.

Performs the / operation. Read more

The resulting type after applying the / operator.

Performs the / operation. Read more

The resulting type after applying the / operator.

Performs the / operation. Read more

The resulting type after applying the / operator.

Performs the / operation. Read more

The resulting type after applying the / operator.

Performs the / operation. Read more

The resulting type after applying the / operator.

Performs the / operation. Read more

The resulting type after applying the / operator.

Performs the / operation. Read more

Performs the /= operation. Read more

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

The associated error which can be returned from parsing.

Parses a string s to return a value of this type. Read more

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

The length of the value.

Convert len into u64.

The zero value for L.

The resulting type after applying the * operator.

Performs the * operation. Read more

The resulting type after applying the * operator.

Performs the * operation. Read more

The resulting type after applying the * operator.

Performs the * operation. Read more

The resulting type after applying the * operator.

Performs the * operation. Read more

The resulting type after applying the * operator.

Performs the * operation. Read more

The resulting type after applying the * operator.

Performs the * operation. Read more

The resulting type after applying the * operator.

Performs the * operation. Read more

The resulting type after applying the * operator.

Performs the * operation. Read more

The resulting type after applying the * operator.

Performs the * operation. Read more

The resulting type after applying the * operator.

Performs the * operation. Read more

The resulting type after applying the * operator.

Performs the * operation. Read more

The resulting type after applying the * operator.

Performs the * operation. Read more

The resulting type after applying the * operator.

Performs the * operation. Read more

Performs the *= operation. Read more

This method returns an Ordering between self and other. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

Restrict a value to a certain interval. Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

The resulting type after applying the % operator.

Performs the % operation. Read more

The resulting type after applying the % operator.

Performs the % operation. Read more

The resulting type after applying the % operator.

Performs the % operation. Read more

The resulting type after applying the % operator.

Performs the % operation. Read more

The resulting type after applying the % operator.

Performs the % operation. Read more

The resulting type after applying the % operator.

Performs the % operation. Read more

The resulting type after applying the % operator.

Performs the % operation. Read more

The resulting type after applying the % operator.

Performs the % operation. Read more

The resulting type after applying the % operator.

Performs the % operation. Read more

The resulting type after applying the % operator.

Performs the % operation. Read more

The resulting type after applying the % operator.

Performs the % operation. Read more

The resulting type after applying the % operator.

Performs the % operation. Read more

The resulting type after applying the % operator.

Performs the % operation. Read more

Performs the %= operation. Read more

Serialize this value into the given Serde serializer. Read more

The resulting type after applying the << operator.

Performs the << operation. Read more

The resulting type after applying the << operator.

Performs the << operation. Read more

The resulting type after applying the << operator.

Performs the << operation. Read more

The resulting type after applying the << operator.

Performs the << operation. Read more

The resulting type after applying the << operator.

Performs the << operation. Read more

The resulting type after applying the << operator.

Performs the << operation. Read more

The resulting type after applying the << operator.

Performs the << operation. Read more

The resulting type after applying the << operator.

Performs the << operation. Read more

The resulting type after applying the << operator.

Performs the << operation. Read more

The resulting type after applying the << operator.

Performs the << operation. Read more

The resulting type after applying the << operator.

Performs the << operation. Read more

The resulting type after applying the << operator.

Performs the << operation. Read more

The resulting type after applying the << operator.

Performs the << operation. Read more

Performs the <<= operation. Read more

The resulting type after applying the >> operator.

Performs the >> operation. Read more

The resulting type after applying the >> operator.

Performs the >> operation. Read more

The resulting type after applying the >> operator.

Performs the >> operation. Read more

The resulting type after applying the >> operator.

Performs the >> operation. Read more

The resulting type after applying the >> operator.

Performs the >> operation. Read more

The resulting type after applying the >> operator.

Performs the >> operation. Read more

The resulting type after applying the >> operator.

Performs the >> operation. Read more

The resulting type after applying the >> operator.

Performs the >> operation. Read more

The resulting type after applying the >> operator.

Performs the >> operation. Read more

The resulting type after applying the >> operator.

Performs the >> operation. Read more

The resulting type after applying the >> operator.

Performs the >> operation. Read more

The resulting type after applying the >> operator.

Performs the >> operation. Read more

The resulting type after applying the >> operator.

Performs the >> operation. Read more

Performs the >>= operation. Read more

The resulting type after applying the - operator.

Performs the - operation. Read more

The resulting type after applying the - operator.

Performs the - operation. Read more

The resulting type after applying the - operator.

Performs the - operation. Read more

The resulting type after applying the - operator.

Performs the - operation. Read more

The resulting type after applying the - operator.

Performs the - operation. Read more

The resulting type after applying the - operator.

Performs the - operation. Read more

The resulting type after applying the - operator.

Performs the - operation. Read more

The resulting type after applying the - operator.

Performs the - operation. Read more

The resulting type after applying the - operator.

Performs the - operation. Read more

The resulting type after applying the - operator.

Performs the - operation. Read more

The resulting type after applying the - operator.

Performs the - operation. Read more

The resulting type after applying the - operator.

Performs the - operation. Read more

The resulting type after applying the - operator.

Performs the - operation. Read more

Performs the -= operation. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Compare self to key and return true if they are equal.

Returns the argument unchanged.

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Converts self into a collection.

Should always be Self

Converts self to a ByteUnit representing self bytes.

Converts self to a ByteUnit representing self kB . Read more

Converts self to a ByteUnit representing self KiB . Read more

Converts self to a ByteUnit representing self MB . Read more

Converts self to a ByteUnit representing self MiB . Read more

Converts self to a ByteUnit representing self GB . Read more

Converts self to a ByteUnit representing self GiB . Read more

Converts self to a ByteUnit representing self TB . Read more

Converts self to a ByteUnit representing self TiB . Read more

Converts self to a ByteUnit representing self PB . Read more

Converts self to a ByteUnit representing self PiB . Read more

Converts self to a ByteUnit representing self EB . Read more

Converts self to a ByteUnit representing self EiB . Read more

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

Converts the given value to a String. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more