Enum Utf8WindowsPrefix

pub enum Utf8WindowsPrefix<'a> {
    Verbatim(&'a str),
    VerbatimUNC(&'a str, &'a str),
    VerbatimDisk(char),
    DeviceNS(&'a str),
    UNC(&'a str, &'a str),
    Disk(char),
}

Windows path prefixes, e.g., C: or \\server\share. This is a byte slice version of std::path::Prefix.

Windows uses a variety of path prefix styles, including references to drive volumes (like C:), network shared folders (like \\server\share), and others. In addition, some path prefixes are “verbatim” (i.e., prefixed with \\?\), in which case / is not treated as a separator and essentially no normalization is performed.

Examples

use typed_path::{Utf8WindowsPath, Utf8WindowsComponent, Utf8WindowsPrefix};
use typed_path::Utf8WindowsPrefix::*;

fn get_path_prefix(s: &str) -> Utf8WindowsPrefix {
    let path = Utf8WindowsPath::new(s);
    match path.components().next().unwrap() {
        Utf8WindowsComponent::Prefix(prefix_component) => prefix_component.kind(),
        _ => panic!(),
    }
}

assert_eq!(Verbatim("pictures"), get_path_prefix(r"\\?\pictures\kittens"));
assert_eq!(VerbatimUNC("server", "share"), get_path_prefix(r"\\?\UNC\server\share"));
assert_eq!(VerbatimDisk('C'), get_path_prefix(r"\\?\c:\"));
assert_eq!(DeviceNS("BrainInterface"), get_path_prefix(r"\\.\BrainInterface"));
assert_eq!(UNC("server", "share"), get_path_prefix(r"\\server\share"));
assert_eq!(Disk('C'), get_path_prefix(r"C:\Users\Rust\Pictures\Ferris"));

Variants

Verbatim(&'a str)

Verbatim prefix, e.g., \\?\cat_pics.

Verbatim prefixes consist of \\?\ immediately followed by the given component.

VerbatimUNC(&'a str, &'a str)

Verbatim prefix using Windows’ Uniform Naming Convention, e.g., \\?\UNC\server\share.

Verbatim UNC prefixes consist of \\?\UNC\ immediately followed by the server’s hostname and a share name.

VerbatimDisk(char)

Verbatim disk prefix, e.g., \\?\C:.

Verbatim disk prefixes consist of \\?\ immediately followed by the drive letter and :.

DeviceNS(&'a str)

Device namespace prefix, e.g., \\.\COM42.

Device namespace prefixes consist of \\.\ (possibly using / instead of \), immediately followed by the device name.

UNC(&'a str, &'a str)

Prefix using Windows’ Uniform Naming Convention, e.g. \\server\share.

UNC prefixes consist of the server’s hostname and a share name.

Disk(char)

Prefix C: for the given disk drive.

Implementations

impl<'a> Utf8WindowsPrefix<'a>

pub fn len(&self) -> usize

Calculates the full byte length of the prefix

Examples

use typed_path::Utf8WindowsPrefix::*;

// \\?\pictures -> 12 bytes
assert_eq!(Verbatim("pictures").len(), 12);

// \\?\UNC\server -> 14 bytes
assert_eq!(VerbatimUNC("server", "").len(), 14);

// \\?\UNC\server\share -> 20 bytes
assert_eq!(VerbatimUNC("server", "share").len(), 20);

// \\?\c: -> 6 bytes
assert_eq!(VerbatimDisk('C').len(), 6);

// \\.\BrainInterface -> 18 bytes
assert_eq!(DeviceNS("BrainInterface").len(), 18);

// \\server\share -> 14 bytes
assert_eq!(UNC("server", "share").len(), 14);

// C: -> 2 bytes
assert_eq!(Disk('C').len(), 2);

pub fn is_verbatim(&self) -> bool

Determines if the prefix is verbatim, i.e., begins with \\?\.

Examples

use typed_path::Utf8WindowsPrefix::*;

assert!(Verbatim("pictures").is_verbatim());
assert!(VerbatimUNC("server", "share").is_verbatim());
assert!(VerbatimDisk('C').is_verbatim());
assert!(!DeviceNS("BrainInterface").is_verbatim());
assert!(!UNC("server", "share").is_verbatim());
assert!(!Disk('C').is_verbatim());

pub fn from_utf8(prefix: &WindowsPrefix<'a>) -> Result<Self, Utf8Error>

Converts a non-UTF-8 WindowsPrefix to a UTF-8 Utf8WindowsPrefix by checking that the prefix contains valid UTF-8.

Errors

Returns Err if the prefix component is not UTF-8 with a description as to why the provided prefix is not UTF-8.

See the docs for Utf8Error for more details on the kinds of errors that can be returned.

pub unsafe fn from_utf8_unchecked(prefix: &WindowsPrefix<'a>) -> Self

Converts a non-UTF-8 WindowsPrefix to a UTF-8 Utf8WindowsPrefix without checking that the string contains valid UTF-8.

See the safe version, from_utf8, for more information.

Safety

The prefix passed in must be valid UTF-8.

Trait Implementations

impl<'a> Clone for Utf8WindowsPrefix<'a>

fn clone(&self) -> Utf8WindowsPrefix<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Utf8WindowsPrefix<'a>

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

Formats the value using the given formatter.

impl<'a> Hash for Utf8WindowsPrefix<'a>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<'a> Ord for Utf8WindowsPrefix<'a>

fn cmp(&self, other: &Utf8WindowsPrefix<'a>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<'a> PartialEq for Utf8WindowsPrefix<'a>

fn eq(&self, other: &Utf8WindowsPrefix<'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> PartialOrd for Utf8WindowsPrefix<'a>

fn partial_cmp(&self, other: &Utf8WindowsPrefix<'a>) -> Option<Ordering>

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

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<'a> TryFrom<&'a str> for Utf8WindowsPrefix<'a>

type Error = &'static str

The type returned in the event of a conversion error.

fn try_from(path: &'a str) -> Result<Self, Self::Error>

Performs the conversion.

impl<'a> Copy for Utf8WindowsPrefix<'a>

impl<'a> Eq for Utf8WindowsPrefix<'a>

impl<'a> StructuralPartialEq for Utf8WindowsPrefix<'a>