Add m-esr52 at 52.6.0

1 files changed, 418 insertions, 0 deletions

diff --git a/third_party/rust/url/src/host.rs b/third_party/rust/url/src/host.rs
new file mode 100644
index 000000000..47b049a27
--- /dev/null
+++ b/third_party/rust/url/src/host.rs
@@ -0,0 +1,418 @@
+// 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.
+
+#[cfg(feature = "heapsize")] use heapsize::HeapSizeOf;
+use std::cmp;
+use std::fmt::{self, Formatter};
+use std::io;
+use std::net::{Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6, ToSocketAddrs};
+use std::vec;
+use parser::{ParseResult, ParseError};
+use percent_encoding::percent_decode;
+use idna;
+
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub enum HostInternal {
+    None,
+    Domain,
+    Ipv4(Ipv4Addr),
+    Ipv6(Ipv6Addr),
+}
+
+#[cfg(feature = "heapsize")]
+known_heap_size!(0, HostInternal);
+
+impl<S> From<Host<S>> for HostInternal {
+    fn from(host: Host<S>) -> HostInternal {
+        match host {
+            Host::Domain(_) => HostInternal::Domain,
+            Host::Ipv4(address) => HostInternal::Ipv4(address),
+            Host::Ipv6(address) => HostInternal::Ipv6(address),
+        }
+    }
+}
+
+/// The host name of an URL.
+#[derive(Clone, Debug, Eq, PartialEq, Ord, PartialOrd, Hash)]
+pub enum Host<S=String> {
+    /// A DNS domain name, as '.' dot-separated labels.
+    /// Non-ASCII labels are encoded in punycode per IDNA.
+    Domain(S),
+
+    /// An IPv4 address.
+    /// `Url::host_str` returns the serialization of this address,
+    /// as four decimal integers separated by `.` dots.
+    Ipv4(Ipv4Addr),
+
+    /// An IPv6 address.
+    /// `Url::host_str` returns the serialization of that address between `[` and `]` brackets,
+    /// in the format per [RFC 5952 *A Recommendation
+    /// for IPv6 Address Text Representation*](https://tools.ietf.org/html/rfc5952):
+    /// lowercase hexadecimal with maximal `::` compression.
+    Ipv6(Ipv6Addr),
+}
+
+#[cfg(feature = "heapsize")]
+impl<S: HeapSizeOf> HeapSizeOf for Host<S> {
+    fn heap_size_of_children(&self) -> usize {
+        match *self {
+            Host::Domain(ref s) => s.heap_size_of_children(),
+            _ => 0,
+        }
+    }
+}
+
+impl<'a> Host<&'a str> {
+    /// Return a copy of `self` that owns an allocated `String` but does not borrow an `&Url`.
+    pub fn to_owned(&self) -> Host<String> {
+        match *self {
+            Host::Domain(domain) => Host::Domain(domain.to_owned()),
+            Host::Ipv4(address) => Host::Ipv4(address),
+            Host::Ipv6(address) => Host::Ipv6(address),
+        }
+    }
+}
+
+impl Host<String> {
+    /// Parse a host: either an IPv6 address in [] square brackets, or a domain.
+    ///
+    /// https://url.spec.whatwg.org/#host-parsing
+    pub fn parse(input: &str) -> Result<Self, ParseError> {
+        if input.starts_with("[") {
+            if !input.ends_with("]") {
+                return Err(ParseError::InvalidIpv6Address)
+            }
+            return parse_ipv6addr(&input[1..input.len() - 1]).map(Host::Ipv6)
+        }
+        let domain = percent_decode(input.as_bytes()).decode_utf8_lossy();
+        let domain = try!(idna::domain_to_ascii(&domain));
+        if domain.find(|c| matches!(c,
+            '\0' | '\t' | '\n' | '\r' | ' ' | '#' | '%' | '/' | ':' | '?' | '@' | '[' | '\\' | ']'
+        )).is_some() {
+            return Err(ParseError::InvalidDomainCharacter)
+        }
+        if let Some(address) = try!(parse_ipv4addr(&domain)) {
+            Ok(Host::Ipv4(address))
+        } else {
+            Ok(Host::Domain(domain.into()))
+        }
+    }
+}
+
+impl<S: AsRef<str>> fmt::Display for Host<S> {
+    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+        match *self {
+            Host::Domain(ref domain) => domain.as_ref().fmt(f),
+            Host::Ipv4(ref addr) => addr.fmt(f),
+            Host::Ipv6(ref addr) => {
+                try!(f.write_str("["));
+                try!(write_ipv6(addr, f));
+                f.write_str("]")
+            }
+        }
+    }
+}
+
+/// This mostly exists because coherence rules don’t allow us to implement
+/// `ToSocketAddrs for (Host<S>, u16)`.
+pub struct HostAndPort<S=String> {
+    pub host: Host<S>,
+    pub port: u16,
+}
+
+impl<'a> HostAndPort<&'a str> {
+    /// Return a copy of `self` that owns an allocated `String` but does not borrow an `&Url`.
+    pub fn to_owned(&self) -> HostAndPort<String> {
+        HostAndPort {
+            host: self.host.to_owned(),
+            port: self.port
+        }
+    }
+}
+
+impl<S: AsRef<str>> ToSocketAddrs for HostAndPort<S> {
+    type Iter = SocketAddrs;
+
+    fn to_socket_addrs(&self) -> io::Result<Self::Iter> {
+        let port = self.port;
+        match self.host {
+            Host::Domain(ref domain) => Ok(SocketAddrs {
+                // FIXME: use std::net::lookup_host when it’s stable.
+                state: SocketAddrsState::Domain(try!((domain.as_ref(), port).to_socket_addrs()))
+            }),
+            Host::Ipv4(address) => Ok(SocketAddrs {
+                state: SocketAddrsState::One(SocketAddr::V4(SocketAddrV4::new(address, port)))
+            }),
+            Host::Ipv6(address) => Ok(SocketAddrs {
+                state: SocketAddrsState::One(SocketAddr::V6(SocketAddrV6::new(address, port, 0, 0)))
+            }),
+        }
+    }
+}
+
+/// Socket addresses for an URL.
+pub struct SocketAddrs {
+    state: SocketAddrsState
+}
+
+enum SocketAddrsState {
+    Domain(vec::IntoIter<SocketAddr>),
+    One(SocketAddr),
+    Done,
+}
+
+impl Iterator for SocketAddrs {
+    type Item = SocketAddr;
+    fn next(&mut self) -> Option<SocketAddr> {
+        match self.state {
+            SocketAddrsState::Domain(ref mut iter) => iter.next(),
+            SocketAddrsState::One(s) => {
+                self.state = SocketAddrsState::Done;
+                Some(s)
+            }
+            SocketAddrsState::Done => None
+        }
+    }
+}
+
+fn write_ipv6(addr: &Ipv6Addr, f: &mut Formatter) -> fmt::Result {
+    let segments = addr.segments();
+    let (compress_start, compress_end) = longest_zero_sequence(&segments);
+    let mut i = 0;
+    while i < 8 {
+        if i == compress_start {
+            try!(f.write_str(":"));
+            if i == 0 {
+                try!(f.write_str(":"));
+            }
+            if compress_end < 8 {
+                i = compress_end;
+            } else {
+                break;
+            }
+        }
+        try!(write!(f, "{:x}", segments[i as usize]));
+        if i < 7 {
+            try!(f.write_str(":"));
+        }
+        i += 1;
+    }
+    Ok(())
+}
+
+fn longest_zero_sequence(pieces: &[u16; 8]) -> (isize, isize) {
+    let mut longest = -1;
+    let mut longest_length = -1;
+    let mut start = -1;
+    macro_rules! finish_sequence(
+        ($end: expr) => {
+            if start >= 0 {
+                let length = $end - start;
+                if length > longest_length {
+                    longest = start;
+                    longest_length = length;
+                }
+            }
+        };
+    );
+    for i in 0..8 {
+        if pieces[i as usize] == 0 {
+            if start < 0 {
+                start = i;
+            }
+        } else {
+            finish_sequence!(i);
+            start = -1;
+        }
+    }
+    finish_sequence!(8);
+    (longest, longest + longest_length)
+}
+
+
+fn parse_ipv4number(mut input: &str) -> Result<u32, ()> {
+    let mut r = 10;
+    if input.starts_with("0x") || input.starts_with("0X") {
+        input = &input[2..];
+        r = 16;
+    } else if input.len() >= 2 && input.starts_with("0") {
+        input = &input[1..];
+        r = 8;
+    }
+    if input.is_empty() {
+        return Ok(0);
+    }
+    if input.starts_with("+") {
+        return Err(())
+    }
+    match u32::from_str_radix(&input, r) {
+        Ok(number) => Ok(number),
+        Err(_) => Err(()),
+    }
+}
+
+fn parse_ipv4addr(input: &str) -> ParseResult<Option<Ipv4Addr>> {
+    if input.is_empty() {
+        return Ok(None)
+    }
+    let mut parts: Vec<&str> = input.split('.').collect();
+    if parts.last() == Some(&"") {
+        parts.pop();
+    }
+    if parts.len() > 4 {
+        return Ok(None);
+    }
+    let mut numbers: Vec<u32> = Vec::new();
+    for part in parts {
+        if part == "" {
+            return Ok(None);
+        }
+        if let Ok(n) = parse_ipv4number(part) {
+            numbers.push(n);
+        } else {
+            return Ok(None);
+        }
+    }
+    let mut ipv4 = numbers.pop().expect("a non-empty list of numbers");
+    // Equivalent to: ipv4 >= 256 ** (4 − numbers.len())
+    if ipv4 > u32::max_value() >> (8 * numbers.len() as u32)  {
+        return Err(ParseError::InvalidIpv4Address);
+    }
+    if numbers.iter().any(|x| *x > 255) {
+        return Err(ParseError::InvalidIpv4Address);
+    }
+    for (counter, n) in numbers.iter().enumerate() {
+        ipv4 += n << (8 * (3 - counter as u32))
+    }
+    Ok(Some(Ipv4Addr::from(ipv4)))
+}
+
+
+fn parse_ipv6addr(input: &str) -> ParseResult<Ipv6Addr> {
+    let input = input.as_bytes();
+    let len = input.len();
+    let mut is_ip_v4 = false;
+    let mut pieces = [0, 0, 0, 0, 0, 0, 0, 0];
+    let mut piece_pointer = 0;
+    let mut compress_pointer = None;
+    let mut i = 0;
+
+    if len < 2 {
+        return Err(ParseError::InvalidIpv6Address)
+    }
+
+    if input[0] == b':' {
+        if input[1] != b':' {
+            return Err(ParseError::InvalidIpv6Address)
+        }
+        i = 2;
+        piece_pointer = 1;
+        compress_pointer = Some(1);
+    }
+
+    while i < len {
+        if piece_pointer == 8 {
+            return Err(ParseError::InvalidIpv6Address)
+        }
+        if input[i] == b':' {
+            if compress_pointer.is_some() {
+                return Err(ParseError::InvalidIpv6Address)
+            }
+            i += 1;
+            piece_pointer += 1;
+            compress_pointer = Some(piece_pointer);
+            continue
+        }
+        let start = i;
+        let end = cmp::min(len, start + 4);
+        let mut value = 0u16;
+        while i < end {
+            match (input[i] as char).to_digit(16) {
+                Some(digit) => {
+                    value = value * 0x10 + digit as u16;
+                    i += 1;
+                },
+                None => break
+            }
+        }
+        if i < len {
+            match input[i] {
+                b'.' => {
+                    if i == start {
+                        return Err(ParseError::InvalidIpv6Address)
+                    }
+                    i = start;
+                    is_ip_v4 = true;
+                },
+                b':' => {
+                    i += 1;
+                    if i == len {
+                        return Err(ParseError::InvalidIpv6Address)
+                    }
+                },
+                _ => return Err(ParseError::InvalidIpv6Address)
+            }
+        }
+        if is_ip_v4 {
+            break
+        }
+        pieces[piece_pointer] = value;
+        piece_pointer += 1;
+    }
+
+    if is_ip_v4 {
+        if piece_pointer > 6 {
+            return Err(ParseError::InvalidIpv6Address)
+        }
+        let mut dots_seen = 0;
+        while i < len {
+            // FIXME: https://github.com/whatwg/url/commit/1c22aa119c354e0020117e02571cec53f7c01064
+            let mut value = 0u16;
+            while i < len {
+                let digit = match input[i] {
+                    c @ b'0' ... b'9' => c - b'0',
+                    _ => break
+                };
+                value = value * 10 + digit as u16;
+                if value == 0 || value > 255 {
+                    return Err(ParseError::InvalidIpv6Address)
+                }
+            }
+            if dots_seen < 3 && !(i < len && input[i] == b'.') {
+                return Err(ParseError::InvalidIpv6Address)
+            }
+            pieces[piece_pointer] = pieces[piece_pointer] * 0x100 + value;
+            if dots_seen == 0 || dots_seen == 2 {
+                piece_pointer += 1;
+            }
+            i += 1;
+            if dots_seen == 3 && i < len {
+                return Err(ParseError::InvalidIpv6Address)
+            }
+            dots_seen += 1;
+        }
+    }
+
+    match compress_pointer {
+        Some(compress_pointer) => {
+            let mut swaps = piece_pointer - compress_pointer;
+            piece_pointer = 7;
+            while swaps > 0 {
+                pieces[piece_pointer] = pieces[compress_pointer + swaps - 1];
+                pieces[compress_pointer + swaps - 1] = 0;
+                swaps -= 1;
+                piece_pointer -= 1;
+            }
+        }
+        _ => if piece_pointer != 8 {
+            return Err(ParseError::InvalidIpv6Address)
+        }
+    }
+    Ok(Ipv6Addr::new(pieces[0], pieces[1], pieces[2], pieces[3],
+                     pieces[4], pieces[5], pieces[6], pieces[7]))
+}