mirror of
https://github.com/servo/servo.git
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116 lines
2.8 KiB
Rust
116 lines
2.8 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! The `ByteString` struct.
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use std::ascii::AsciiExt;
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use std::borrow::ToOwned;
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use std::hash::{Hash, Hasher};
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use std::mem;
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use std::ops;
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use std::str;
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use std::str::FromStr;
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/// Encapsulates the IDL `ByteString` type.
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#[derive(JSTraceable, Clone, Eq, PartialEq, HeapSizeOf)]
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pub struct ByteString(Vec<u8>);
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impl ByteString {
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/// Creates a new `ByteString`.
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pub fn new(value: Vec<u8>) -> ByteString {
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ByteString(value)
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}
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/// Returns `self` as a string, if it encodes valid UTF-8, and `None`
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/// otherwise.
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pub fn as_str(&self) -> Option<&str> {
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str::from_utf8(&self.0).ok()
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}
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/// Returns ownership of the underlying Vec<u8> and copies an empty
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/// vec in its place
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pub fn bytes(&mut self) -> Vec<u8> {
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mem::replace(&mut self.0, Vec::new())
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}
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/// Returns the length.
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pub fn len(&self) -> usize {
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self.0.len()
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}
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/// Compare `self` to `other`, matching A–Z and a–z as equal.
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pub fn eq_ignore_case(&self, other: &ByteString) -> bool {
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self.0.eq_ignore_ascii_case(&other.0)
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}
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/// Returns `self` with A–Z replaced by a–z.
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pub fn to_lower(&self) -> ByteString {
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ByteString::new(self.0.to_ascii_lowercase())
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}
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}
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impl Into<Vec<u8>> for ByteString {
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fn into(self) -> Vec<u8> {
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self.0
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}
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}
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impl Hash for ByteString {
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fn hash<H: Hasher>(&self, state: &mut H) {
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self.0.hash(state);
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}
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}
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impl FromStr for ByteString {
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type Err = ();
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fn from_str(s: &str) -> Result<ByteString, ()> {
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Ok(ByteString::new(s.to_owned().into_bytes()))
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}
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}
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impl ops::Deref for ByteString {
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type Target = [u8];
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fn deref(&self) -> &[u8] {
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&self.0
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}
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}
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/// A string that is constructed from a UCS-2 buffer by replacing invalid code
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/// points with the replacement character.
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pub struct USVString(pub String);
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/// Returns whether `s` is a `token`, as defined by
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/// [RFC 2616](http://tools.ietf.org/html/rfc2616#page-17).
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pub fn is_token(s: &[u8]) -> bool {
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if s.is_empty() {
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return false; // A token must be at least a single character
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}
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s.iter().all(|&x| {
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// http://tools.ietf.org/html/rfc2616#section-2.2
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match x {
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0...31 | 127 => false, // CTLs
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40 |
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41 |
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60 |
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62 |
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64 |
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44 |
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92 |
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34 |
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63 |
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61 |
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123 |
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125 |
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32 => false, // separators
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x if x > 127 => false, // non-CHARs
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_ => true,
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}
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})
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}
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