Add m-esr52 at 52.6.0

1 files changed, 344 insertions, 0 deletions

diff --git a/third_party/rust/url/src/percent_encoding.rs b/third_party/rust/url/src/percent_encoding.rs
new file mode 100644
index 000000000..a4fb6177a
--- /dev/null
+++ b/third_party/rust/url/src/percent_encoding.rs
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+// Copyright 2013-2016 The rust-url developers.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use encoding;
+use std::ascii::AsciiExt;
+use std::borrow::Cow;
+use std::fmt;
+use std::slice;
+use std::str;
+
+/// Represents a set of characters / bytes that should be percent-encoded.
+///
+/// See [encode sets specification](http://url.spec.whatwg.org/#simple-encode-set).
+///
+/// Different characters need to be encoded in different parts of an URL.
+/// For example, a literal `?` question mark in an URL’s path would indicate
+/// the start of the query string.
+/// A question mark meant to be part of the path therefore needs to be percent-encoded.
+/// In the query string however, a question mark does not have any special meaning
+/// and does not need to be percent-encoded.
+///
+/// A few sets are defined in this module.
+/// Use the [`define_encode_set!`](../macro.define_encode_set!.html) macro to define different ones.
+pub trait EncodeSet: Clone {
+    /// Called with UTF-8 bytes rather than code points.
+    /// Should return true for all non-ASCII bytes.
+    fn contains(&self, byte: u8) -> bool;
+}
+
+/// Define a new struct
+/// that implements the [`EncodeSet`](percent_encoding/trait.EncodeSet.html) trait,
+/// for use in [`percent_decode()`](percent_encoding/fn.percent_encode.html)
+/// and related functions.
+///
+/// Parameters are characters to include in the set in addition to those of the base set.
+/// See [encode sets specification](http://url.spec.whatwg.org/#simple-encode-set).
+///
+/// Example
+/// =======
+///
+/// ```rust
+/// #[macro_use] extern crate url;
+/// use url::percent_encoding::{utf8_percent_encode, SIMPLE_ENCODE_SET};
+/// define_encode_set! {
+///     /// This encode set is used in the URL parser for query strings.
+///     pub QUERY_ENCODE_SET = [SIMPLE_ENCODE_SET] | {' ', '"', '#', '<', '>'}
+/// }
+/// # fn main() {
+/// assert_eq!(utf8_percent_encode("foo bar", QUERY_ENCODE_SET).collect::<String>(), "foo%20bar");
+/// # }
+/// ```
+#[macro_export]
+macro_rules! define_encode_set {
+    ($(#[$attr: meta])* pub $name: ident = [$base_set: expr] | {$($ch: pat),*}) => {
+        $(#[$attr])*
+        #[derive(Copy, Clone)]
+        #[allow(non_camel_case_types)]
+        pub struct $name;
+
+        impl $crate::percent_encoding::EncodeSet for $name {
+            #[inline]
+            fn contains(&self, byte: u8) -> bool {
+                match byte as char {
+                    $(
+                        $ch => true,
+                    )*
+                    _ => $base_set.contains(byte)
+                }
+            }
+        }
+    }
+}
+
+/// This encode set is used for the path of cannot-be-a-base URLs.
+#[derive(Copy, Clone)]
+#[allow(non_camel_case_types)]
+pub struct SIMPLE_ENCODE_SET;
+
+impl EncodeSet for SIMPLE_ENCODE_SET {
+    #[inline]
+    fn contains(&self, byte: u8) -> bool {
+        byte < 0x20 || byte > 0x7E
+    }
+}
+
+define_encode_set! {
+    /// This encode set is used in the URL parser for query strings.
+    pub QUERY_ENCODE_SET = [SIMPLE_ENCODE_SET] | {' ', '"', '#', '<', '>'}
+}
+
+define_encode_set! {
+    /// This encode set is used for path components.
+    pub DEFAULT_ENCODE_SET = [QUERY_ENCODE_SET] | {'`', '?', '{', '}'}
+}
+
+define_encode_set! {
+    /// This encode set is used for on '/'-separated path segment
+    pub PATH_SEGMENT_ENCODE_SET = [DEFAULT_ENCODE_SET] | {'%', '/'}
+}
+
+define_encode_set! {
+    /// This encode set is used for username and password.
+    pub USERINFO_ENCODE_SET = [DEFAULT_ENCODE_SET] | {
+        '/', ':', ';', '=', '@', '[', '\\', ']', '^', '|'
+    }
+}
+
+/// Return the percent-encoding of the given bytes.
+///
+/// This is unconditional, unlike `percent_encode()` which uses an encode set.
+pub fn percent_encode_byte(byte: u8) -> &'static str {
+    let index = usize::from(byte) * 3;
+    &"\
+        %00%01%02%03%04%05%06%07%08%09%0A%0B%0C%0D%0E%0F\
+        %10%11%12%13%14%15%16%17%18%19%1A%1B%1C%1D%1E%1F\
+        %20%21%22%23%24%25%26%27%28%29%2A%2B%2C%2D%2E%2F\
+        %30%31%32%33%34%35%36%37%38%39%3A%3B%3C%3D%3E%3F\
+        %40%41%42%43%44%45%46%47%48%49%4A%4B%4C%4D%4E%4F\
+        %50%51%52%53%54%55%56%57%58%59%5A%5B%5C%5D%5E%5F\
+        %60%61%62%63%64%65%66%67%68%69%6A%6B%6C%6D%6E%6F\
+        %70%71%72%73%74%75%76%77%78%79%7A%7B%7C%7D%7E%7F\
+        %80%81%82%83%84%85%86%87%88%89%8A%8B%8C%8D%8E%8F\
+        %90%91%92%93%94%95%96%97%98%99%9A%9B%9C%9D%9E%9F\
+        %A0%A1%A2%A3%A4%A5%A6%A7%A8%A9%AA%AB%AC%AD%AE%AF\
+        %B0%B1%B2%B3%B4%B5%B6%B7%B8%B9%BA%BB%BC%BD%BE%BF\
+        %C0%C1%C2%C3%C4%C5%C6%C7%C8%C9%CA%CB%CC%CD%CE%CF\
+        %D0%D1%D2%D3%D4%D5%D6%D7%D8%D9%DA%DB%DC%DD%DE%DF\
+        %E0%E1%E2%E3%E4%E5%E6%E7%E8%E9%EA%EB%EC%ED%EE%EF\
+        %F0%F1%F2%F3%F4%F5%F6%F7%F8%F9%FA%FB%FC%FD%FE%FF\
+    "[index..index + 3]
+}
+
+/// Percent-encode the given bytes with the given encode set.
+///
+/// The encode set define which bytes (in addition to non-ASCII and controls)
+/// need to be percent-encoded.
+/// The choice of this set depends on context.
+/// For example, `?` needs to be encoded in an URL path but not in a query string.
+///
+/// The return value is an iterator of `&str` slices (so it has a `.collect::<String>()` method)
+/// that also implements `Display` and `Into<Cow<str>>`.
+/// The latter returns `Cow::Borrowed` when none of the bytes in `input`
+/// are in the given encode set.
+#[inline]
+pub fn percent_encode<E: EncodeSet>(input: &[u8], encode_set: E) -> PercentEncode<E> {
+    PercentEncode {
+        bytes: input,
+        encode_set: encode_set,
+    }
+}
+
+/// Percent-encode the UTF-8 encoding of the given string.
+///
+/// See `percent_encode()` for how to use the return value.
+#[inline]
+pub fn utf8_percent_encode<E: EncodeSet>(input: &str, encode_set: E) -> PercentEncode<E> {
+    percent_encode(input.as_bytes(), encode_set)
+}
+
+/// The return type of `percent_encode()` and `utf8_percent_encode()`.
+#[derive(Clone)]
+pub struct PercentEncode<'a, E: EncodeSet> {
+    bytes: &'a [u8],
+    encode_set: E,
+}
+
+impl<'a, E: EncodeSet> Iterator for PercentEncode<'a, E> {
+    type Item = &'a str;
+
+    fn next(&mut self) -> Option<&'a str> {
+        if let Some((&first_byte, remaining)) = self.bytes.split_first() {
+            if self.encode_set.contains(first_byte) {
+                self.bytes = remaining;
+                Some(percent_encode_byte(first_byte))
+            } else {
+                assert!(first_byte.is_ascii());
+                for (i, &byte) in remaining.iter().enumerate() {
+                    if self.encode_set.contains(byte) {
+                        // 1 for first_byte + i for previous iterations of this loop
+                        let (unchanged_slice, remaining) = self.bytes.split_at(1 + i);
+                        self.bytes = remaining;
+                        return Some(unsafe { str::from_utf8_unchecked(unchanged_slice) })
+                    } else {
+                        assert!(byte.is_ascii());
+                    }
+                }
+                let unchanged_slice = self.bytes;
+                self.bytes = &[][..];
+                Some(unsafe { str::from_utf8_unchecked(unchanged_slice) })
+            }
+        } else {
+            None
+        }
+    }
+
+    fn size_hint(&self) -> (usize, Option<usize>) {
+        if self.bytes.is_empty() {
+            (0, Some(0))
+        } else {
+            (1, Some(self.bytes.len()))
+        }
+    }
+}
+
+impl<'a, E: EncodeSet> fmt::Display for PercentEncode<'a, E> {
+    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+        for c in (*self).clone() {
+            try!(formatter.write_str(c))
+        }
+        Ok(())
+    }
+}
+
+impl<'a, E: EncodeSet> From<PercentEncode<'a, E>> for Cow<'a, str> {
+    fn from(mut iter: PercentEncode<'a, E>) -> Self {
+        match iter.next() {
+            None => "".into(),
+            Some(first) => {
+                match iter.next() {
+                    None => first.into(),
+                    Some(second) => {
+                        let mut string = first.to_owned();
+                        string.push_str(second);
+                        string.extend(iter);
+                        string.into()
+                    }
+                }
+            }
+        }
+    }
+}
+
+/// Percent-decode the given bytes.
+///
+/// The return value is an iterator of decoded `u8` bytes
+/// that also implements `Into<Cow<u8>>`
+/// (which returns `Cow::Borrowed` when `input` contains no percent-encoded sequence)
+/// and has `decode_utf8()` and `decode_utf8_lossy()` methods.
+#[inline]
+pub fn percent_decode<'a>(input: &'a [u8]) -> PercentDecode<'a> {
+    PercentDecode {
+        bytes: input.iter()
+    }
+}
+
+/// The return type of `percent_decode()`.
+#[derive(Clone)]
+pub struct PercentDecode<'a> {
+    bytes: slice::Iter<'a, u8>,
+}
+
+fn after_percent_sign(iter: &mut slice::Iter<u8>) -> Option<u8> {
+    let initial_iter = iter.clone();
+    let h = iter.next().and_then(|&b| (b as char).to_digit(16));
+    let l = iter.next().and_then(|&b| (b as char).to_digit(16));
+    if let (Some(h), Some(l)) = (h, l) {
+        Some(h as u8 * 0x10 + l as u8)
+    } else {
+        *iter = initial_iter;
+        None
+    }
+}
+
+impl<'a> Iterator for PercentDecode<'a> {
+    type Item = u8;
+
+    fn next(&mut self) -> Option<u8> {
+        self.bytes.next().map(|&byte| {
+            if byte == b'%' {
+                after_percent_sign(&mut self.bytes).unwrap_or(byte)
+            } else {
+                byte
+            }
+        })
+    }
+
+    fn size_hint(&self) -> (usize, Option<usize>) {
+        let bytes = self.bytes.len();
+        (bytes / 3, Some(bytes))
+    }
+}
+
+impl<'a> From<PercentDecode<'a>> for Cow<'a, [u8]> {
+    fn from(iter: PercentDecode<'a>) -> Self {
+        match iter.if_any() {
+            Some(vec) => Cow::Owned(vec),
+            None => Cow::Borrowed(iter.bytes.as_slice()),
+        }
+    }
+}
+
+impl<'a> PercentDecode<'a> {
+    /// If the percent-decoding is different from the input, return it as a new bytes vector.
+    pub fn if_any(&self) -> Option<Vec<u8>> {
+        let mut bytes_iter = self.bytes.clone();
+        while bytes_iter.find(|&&b| b == b'%').is_some() {
+            if let Some(decoded_byte) = after_percent_sign(&mut bytes_iter) {
+                let initial_bytes = self.bytes.as_slice();
+                let unchanged_bytes_len = initial_bytes.len() - bytes_iter.len() - 3;
+                let mut decoded = initial_bytes[..unchanged_bytes_len].to_owned();
+                decoded.push(decoded_byte);
+                decoded.extend(PercentDecode {
+                    bytes: bytes_iter
+                });
+                return Some(decoded)
+            }
+        }
+        // Nothing to decode
+        None
+    }
+
+    /// Decode the result of percent-decoding as UTF-8.
+    ///
+    /// This is return `Err` when the percent-decoded bytes are not well-formed in UTF-8.
+    pub fn decode_utf8(self) -> Result<Cow<'a, str>, str::Utf8Error> {
+        match self.clone().into() {
+            Cow::Borrowed(bytes) => {
+                match str::from_utf8(bytes) {
+                    Ok(s) => Ok(s.into()),
+                    Err(e) => Err(e),
+                }
+            }
+            Cow::Owned(bytes) => {
+                match String::from_utf8(bytes) {
+                    Ok(s) => Ok(s.into()),
+                    Err(e) => Err(e.utf8_error()),
+                }
+            }
+        }
+    }
+
+    /// Decode the result of percent-decoding as UTF-8, lossily.
+    ///
+    /// Invalid UTF-8 percent-encoded byte sequences will be replaced � U+FFFD,
+    /// the replacement character.
+    pub fn decode_utf8_lossy(self) -> Cow<'a, str> {
+        encoding::decode_utf8_lossy(self.clone().into())
+    }
+}