Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

2 files changed, 1197 insertions, 0 deletions

diff --git a/third_party/rust/rust-ini/src/ini.rs b/third_party/rust/rust-ini/src/ini.rs
new file mode 100644
index 0000000000..9e1e3b2d14
--- /dev/null
+++ b/third_party/rust/rust-ini/src/ini.rs
@@ -0,0 +1,1150 @@
+// The MIT License (MIT)
+
+// Copyright (c) 2014 Y. T. CHUNG
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy of
+// this software and associated documentation files (the "Software"), to deal in
+// the Software without restriction, including without limitation the rights to
+// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+// the Software, and to permit persons to whom the Software is furnished to do so,
+// subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+//! Ini
+
+use std::collections::HashMap;
+use std::collections::hash_map::{IntoIter, Iter, IterMut, Keys};
+use std::collections::hash_map::Entry;
+use std::fs::{File, OpenOptions};
+use std::ops::{Index, IndexMut};
+use std::char;
+use std::io::{self, Read, Write};
+use std::fmt::{self, Display};
+use std::path::Path;
+use std::str::Chars;
+use std::borrow::Borrow;
+use std::hash::Hash;
+use std::cmp::Eq;
+use std::error;
+
+#[derive(Debug, PartialEq, Copy, Clone)]
+pub enum EscapePolicy {
+    /// escape absolutely nothing (dangerous)
+    Nothing,
+    /// only escape the most necessary things
+    Basics,
+    /// escape basics and non-ascii characters
+    BasicsUnicode,
+    /// Escape reserved symbols.
+    Reserved,
+    /// Escape reserved symbols and non-ascii characters
+    ReservedUnicode,
+    /// Escape everything that some INI implementations assume
+    Everything,
+}
+
+impl EscapePolicy {
+    fn escape_basics(&self) -> bool {
+        match *self {
+            EscapePolicy::Nothing => false,
+            _ => true,
+        }
+    }
+
+    fn escape_reserved(&self) -> bool {
+        match *self {
+            EscapePolicy::Reserved => true,
+            EscapePolicy::ReservedUnicode => true,
+            EscapePolicy::Everything => true,
+            _ => false,
+        }
+    }
+
+    fn escape_unicode(&self) -> bool {
+        match *self {
+            EscapePolicy::BasicsUnicode => true,
+            EscapePolicy::ReservedUnicode => true,
+            EscapePolicy::Everything => true,
+            _ => false,
+        }
+    }
+
+    /// Given a character this returns true if it should be escaped as
+    /// per this policy or false if not.
+    pub fn should_escape(&self, c: char) -> bool {
+        match c {
+            '\\' | '\x00'...'\x1f' | '\x7f'...'\u{00ff}' => self.escape_basics(),
+            ';' | '#' | '=' | ':' => self.escape_reserved(),
+            '\u{0080}'...'\u{FFFF}' => self.escape_unicode(),
+            _ => false,
+        }
+    }
+}
+
+// Escape non-INI characters
+//
+// Common escape sequences: https://en.wikipedia.org/wiki/INI_file#Escape_characters
+//
+// * `\\` \ (a single backslash, escaping the escape character)
+// * `\0` Null character
+// * `\a` Bell/Alert/Audible
+// * `\b` Backspace, Bell character for some applications
+// * `\t` Tab character
+// * `\r` Carriage return
+// * `\n` Line feed
+// * `\;` Semicolon
+// * `\#` Number sign
+// * `\=` Equals sign
+// * `\:` Colon
+// * `\x????` Unicode character with hexadecimal code point corresponding to ????
+fn escape_str(s: &str, policy: EscapePolicy) -> String {
+    let mut escaped: String = String::with_capacity(s.len());
+    for c in s.chars() {
+        // if we know this is not something to escape as per policy, we just
+        // write it and continue.
+        if !policy.should_escape(c) {
+            escaped.push(c);
+            continue;
+        }
+
+        match c {
+            '\\' => escaped.push_str("\\\\"),
+            '\0' => escaped.push_str("\\0"),
+            '\x01'...'\x06' | '\x0e'...'\x1f' | '\x7f'...'\u{00ff}' => {
+                escaped.push_str(&format!("\\x{:04x}", c as isize)[..])
+            }
+            '\x07' => escaped.push_str("\\a"),
+            '\x08' => escaped.push_str("\\b"),
+            '\x0c' => escaped.push_str("\\f"),
+            '\x0b' => escaped.push_str("\\v"),
+            '\n' => escaped.push_str("\\n"),
+            '\t' => escaped.push_str("\\t"),
+            '\r' => escaped.push_str("\\r"),
+            '\u{0080}'...'\u{FFFF}' => escaped.push_str(&format!("\\x{:04x}", c as isize)[..]),
+            _ => {
+                escaped.push('\\');
+                escaped.push(c);
+            }
+        }
+    }
+    escaped
+}
+
+/// A setter which could be used to set key-value pair in a specified section
+pub struct SectionSetter<'a> {
+    ini: &'a mut Ini,
+    section_name: Option<String>,
+}
+
+impl<'a> SectionSetter<'a> {
+    fn new(ini: &'a mut Ini, section_name: Option<String>) -> SectionSetter<'a> {
+        SectionSetter {
+            ini: ini,
+            section_name: section_name,
+        }
+    }
+
+    /// Set key-value pair in this section
+    pub fn set<K, V>(&'a mut self, key: K, value: V) -> &'a mut SectionSetter<'a>
+    where
+        K: Into<String>,
+        V: Into<String>,
+    {
+        {
+            let prop = match self.ini.sections.entry(self.section_name.clone()) {
+                Entry::Vacant(entry) => entry.insert(HashMap::new()),
+                Entry::Occupied(entry) => entry.into_mut(),
+            };
+            prop.insert(key.into(), value.into());
+        }
+        self
+    }
+
+    /// Delete the entry in this section with `key`
+    pub fn delete<K>(&'a mut self, key: &K) -> &'a mut SectionSetter<'a>
+    where
+        String: Borrow<K>,
+        K: Hash + Eq + ?Sized,
+    {
+        if let Some(prop) = self.ini.sections.get_mut(&self.section_name) {
+            prop.remove(key);
+        }
+        self
+    }
+
+    /// Get the entry in this section with `key`
+    pub fn get<K>(&'a mut self, key: &K) -> Option<&'a str>
+    where
+        String: Borrow<K>,
+        K: Hash + Eq + ?Sized,
+    {
+        self.ini
+            .sections
+            .get(&self.section_name)
+            .and_then(|prop| prop.get(key).map(|s| &s[..]))
+    }
+}
+
+/// Properties type (key-value pairs)
+pub type Properties = HashMap<String, String>; // Key-value pairs
+
+/// Ini struct
+#[derive(Clone)]
+pub struct Ini {
+    sections: HashMap<Option<String>, Properties>,
+}
+
+impl Ini {
+    /// Create an instance
+    pub fn new() -> Ini {
+        Ini {
+            sections: HashMap::new(),
+        }
+    }
+
+    /// Set with a specified section, `None` is for the general section
+    pub fn with_section<'b, S>(&'b mut self, section: Option<S>) -> SectionSetter<'b>
+    where
+        S: Into<String>,
+    {
+        SectionSetter::new(self, section.map(|s| s.into()))
+    }
+
+    /// Get the immmutable general section
+    pub fn general_section(&self) -> &Properties {
+        self.section(None::<String>)
+            .expect("There is no general section in this Ini")
+    }
+
+    /// Get the mutable general section
+    pub fn general_section_mut(&mut self) -> &mut Properties {
+        self.section_mut(None::<String>)
+            .expect("There is no general section in this Ini")
+    }
+
+    /// Get a immutable section
+    pub fn section<'a, S>(&'a self, name: Option<S>) -> Option<&'a Properties>
+    where
+        S: Into<String>,
+    {
+        self.sections.get(&name.map(|s| s.into()))
+    }
+
+    /// Get a mutable section
+    pub fn section_mut<'a, S>(&'a mut self, name: Option<S>) -> Option<&'a mut Properties>
+    where
+        S: Into<String>,
+    {
+        self.sections.get_mut(&name.map(|s| s.into()))
+    }
+
+    /// Get the entry
+    pub fn entry<'a>(&'a mut self, name: Option<String>) -> Entry<Option<String>, Properties> {
+        self.sections.entry(name.map(|s| s.into()))
+    }
+
+    /// Clear all entries
+    pub fn clear<'a>(&mut self) {
+        self.sections.clear()
+    }
+
+    /// Iterate with sections
+    pub fn sections<'a>(&'a self) -> Keys<'a, Option<String>, Properties> {
+        self.sections.keys()
+    }
+
+    /// Set key-value to a section
+    pub fn set_to<S>(&mut self, section: Option<S>, key: String, value: String)
+    where
+        S: Into<String>,
+    {
+        self.with_section(section).set(key, value);
+    }
+
+    /// Get the value from a section with key
+    ///
+    /// Example:
+    ///
+    /// ```
+    /// use ini::Ini;
+    /// let input = "[sec]\nabc = def\n";
+    /// let ini = Ini::load_from_str(input).unwrap();
+    /// assert_eq!(ini.get_from(Some("sec"), "abc"), Some("def"));
+    /// ```
+    pub fn get_from<'a, S>(&'a self, section: Option<S>, key: &str) -> Option<&'a str>
+    where
+        S: Into<String>,
+    {
+        match self.sections.get(&section.map(|s| s.into())) {
+            None => None,
+            Some(ref prop) => match prop.get(key) {
+                Some(p) => Some(&p[..]),
+                None => None,
+            },
+        }
+    }
+
+    /// Get the value from a section with key, return the default value if it does not exist
+    ///
+    /// Example:
+    ///
+    /// ```
+    /// use ini::Ini;
+    /// let input = "[sec]\n";
+    /// let ini = Ini::load_from_str(input).unwrap();
+    /// assert_eq!(ini.get_from_or(Some("sec"), "key", "default"), "default");
+    /// ```
+    pub fn get_from_or<'a, S>(&'a self, section: Option<S>, key: &str, default: &'a str) -> &'a str
+    where
+        S: Into<String>,
+    {
+        match self.sections.get(&section.map(|s| s.into())) {
+            None => default,
+            Some(ref prop) => match prop.get(key) {
+                Some(p) => &p[..],
+                None => default,
+            },
+        }
+    }
+
+    /// Get the mutable from a section with key
+    pub fn get_from_mut<'a, S>(&'a mut self, section: Option<S>, key: &str) -> Option<&'a str>
+    where
+        S: Into<String>,
+    {
+        match self.sections.get_mut(&section.map(|s| s.into())) {
+            None => None,
+            Some(prop) => prop.get_mut(key).map(|s| &s[..]),
+        }
+    }
+
+    /// Delete a section, return the properties if it exists
+    pub fn delete<S>(&mut self, section: Option<S>) -> Option<Properties>
+    where
+        S: Into<String>,
+    {
+        self.sections.remove(&section.map(|s| s.into()))
+    }
+
+    pub fn delete_from<S>(&mut self, section: Option<S>, key: &str) -> Option<String>
+    where
+        S: Into<String>,
+    {
+        match self.section_mut(section) {
+            None => return None,
+            Some(prop) => prop.remove(key),
+        }
+    }
+}
+
+impl<'q> Index<&'q Option<String>> for Ini {
+    type Output = Properties;
+
+    fn index<'a>(&'a self, index: &'q Option<String>) -> &'a Properties {
+        match self.sections.get(index) {
+            Some(p) => p,
+            None => panic!("Section `{:?}` does not exist", index),
+        }
+    }
+}
+
+impl<'i> IndexMut<&'i Option<String>> for Ini {
+    fn index_mut<'a>(&'a mut self, index: &Option<String>) -> &'a mut Properties {
+        match self.sections.get_mut(index) {
+            Some(p) => p,
+            None => panic!("Section `{:?}` does not exist", index),
+        }
+    }
+}
+
+impl<'q> Index<&'q str> for Ini {
+    type Output = Properties;
+
+    fn index<'a>(&'a self, index: &'q str) -> &'a Properties {
+        match self.sections.get(&Some(index.into())) {
+            Some(p) => p,
+            None => panic!("Section `{}` does not exist", index),
+        }
+    }
+}
+
+impl<'q> IndexMut<&'q str> for Ini {
+    fn index_mut<'a>(&'a mut self, index: &'q str) -> &'a mut Properties {
+        match self.sections.get_mut(&Some(index.into())) {
+            Some(p) => p,
+            None => panic!("Section `{}` does not exist", index),
+        }
+    }
+}
+
+impl Ini {
+    /// Write to a file
+    pub fn write_to_file<P: AsRef<Path>>(&self, filename: P) -> io::Result<()> {
+        self.write_to_file_policy(filename, EscapePolicy::Basics)
+    }
+
+    /// Write to a file
+    pub fn write_to_file_policy<P: AsRef<Path>>(
+        &self,
+        filename: P,
+        policy: EscapePolicy,
+    ) -> io::Result<()> {
+        let mut file = try!(
+            OpenOptions::new()
+                .write(true)
+                .truncate(true)
+                .create(true)
+                .open(filename.as_ref())
+        );
+        self.write_to_policy(&mut file, policy)
+    }
+
+    /// Write to a writer
+    pub fn write_to<W: Write>(&self, writer: &mut W) -> io::Result<()> {
+        self.write_to_policy(writer, EscapePolicy::Basics)
+    }
+
+    /// Write to a writer
+    pub fn write_to_policy<W: Write>(
+        &self,
+        writer: &mut W,
+        policy: EscapePolicy,
+    ) -> io::Result<()> {
+        let mut firstline = true;
+
+        match self.sections.get(&None) {
+            Some(props) => {
+                for (k, v) in props.iter() {
+                    let k_str = escape_str(&k[..], policy);
+                    let v_str = escape_str(&v[..], policy);
+                    try!(write!(writer, "{}={}\n", k_str, v_str));
+                }
+                firstline = false;
+            }
+            None => {}
+        }
+
+        for (section, props) in self.sections.iter().filter(|&(ref s, _)| s.is_some()) {
+            if firstline {
+                firstline = false;
+            } else {
+                try!(writer.write_all(b"\n"));
+            }
+
+            if let &Some(ref section) = section {
+                try!(write!(writer, "[{}]\n", escape_str(&section[..], policy)));
+
+                for (k, v) in props.iter() {
+                    let k_str = escape_str(&k[..], policy);
+                    let v_str = escape_str(&v[..], policy);
+                    try!(write!(writer, "{}={}\n", k_str, v_str));
+                }
+            }
+        }
+        Ok(())
+    }
+}
+
+impl Ini {
+    /// Load from a string
+    pub fn load_from_str(buf: &str) -> Result<Ini, Error> {
+        let mut parser = Parser::new(buf.chars(), false);
+        parser.parse()
+    }
+
+    /// Load from a string, but do not interpret '\' as an escape character
+    pub fn load_from_str_noescape(buf: &str) -> Result<Ini, Error> {
+        let mut parser = Parser::new(buf.chars(), true);
+        parser.parse()
+    }
+
+    /// Load from a reader
+    pub fn read_from<R: Read>(reader: &mut R) -> Result<Ini, Error> {
+        let mut s = String::new();
+        try!(reader.read_to_string(&mut s).map_err(|err| Error {
+            line: 0,
+            col: 0,
+            msg: format!("{}", err),
+        }));
+        let mut parser = Parser::new(s.chars(), false);
+        parser.parse()
+    }
+
+    /// Load from a reader, but do not interpret '\' as an escape character
+    pub fn read_from_noescape<R: Read>(reader: &mut R) -> Result<Ini, Error> {
+        let mut s = String::new();
+        try!(reader.read_to_string(&mut s).map_err(|err| Error {
+            line: 0,
+            col: 0,
+            msg: format!("{}", err),
+        }));
+        let mut parser = Parser::new(s.chars(), true);
+        parser.parse()
+    }
+
+    /// Load from a file
+    pub fn load_from_file<P: AsRef<Path>>(filename: P) -> Result<Ini, Error> {
+        let mut reader = match File::open(filename.as_ref()) {
+            Err(e) => {
+                return Err(Error {
+                    line: 0,
+                    col: 0,
+                    msg: format!("Unable to open `{:?}`: {}", filename.as_ref(), e),
+                })
+            }
+            Ok(r) => r,
+        };
+        Ini::read_from(&mut reader)
+    }
+
+    /// Load from a file, but do not interpret '\' as an escape character
+    pub fn load_from_file_noescape<P: AsRef<Path>>(filename: P) -> Result<Ini, Error> {
+        let mut reader = match File::open(filename.as_ref()) {
+            Err(e) => {
+                return Err(Error {
+                    line: 0,
+                    col: 0,
+                    msg: format!("Unable to open `{:?}`: {}", filename.as_ref(), e),
+                })
+            }
+            Ok(r) => r,
+        };
+        Ini::read_from_noescape(&mut reader)
+    }
+}
+
+/// Iterator for sections
+pub struct SectionIterator<'a> {
+    mapiter: Iter<'a, Option<String>, Properties>,
+}
+
+/// Iterator for mutable sections
+pub struct SectionMutIterator<'a> {
+    mapiter: IterMut<'a, Option<String>, Properties>,
+}
+
+impl<'a> Ini {
+    /// Immutable iterate though sections
+    pub fn iter(&'a self) -> SectionIterator<'a> {
+        SectionIterator {
+            mapiter: self.sections.iter(),
+        }
+    }
+
+    /// Mutable iterate though sections
+    /// *Deprecated! Use `iter_mut` instead!*
+    pub fn mut_iter(&'a mut self) -> SectionMutIterator<'a> {
+        SectionMutIterator {
+            mapiter: self.sections.iter_mut(),
+        }
+    }
+
+    /// Mutable iterate though sections
+    pub fn iter_mut(&'a mut self) -> SectionMutIterator<'a> {
+        SectionMutIterator {
+            mapiter: self.sections.iter_mut(),
+        }
+    }
+}
+
+impl<'a> Iterator for SectionIterator<'a> {
+    type Item = (&'a Option<String>, &'a Properties);
+
+    #[inline]
+    fn next(&mut self) -> Option<(&'a Option<String>, &'a Properties)> {
+        self.mapiter.next()
+    }
+}
+
+impl<'a> Iterator for SectionMutIterator<'a> {
+    type Item = (&'a Option<String>, &'a mut Properties);
+
+    #[inline]
+    fn next(&mut self) -> Option<(&'a Option<String>, &'a mut Properties)> {
+        self.mapiter.next()
+    }
+}
+
+impl<'a> IntoIterator for &'a Ini {
+    type Item = (&'a Option<String>, &'a Properties);
+    type IntoIter = SectionIterator<'a>;
+
+    fn into_iter(self) -> SectionIterator<'a> {
+        self.iter()
+    }
+}
+
+impl<'a> IntoIterator for &'a mut Ini {
+    type Item = (&'a Option<String>, &'a mut Properties);
+    type IntoIter = SectionMutIterator<'a>;
+
+    fn into_iter(self) -> SectionMutIterator<'a> {
+        self.iter_mut()
+    }
+}
+
+pub struct SectionIntoIter {
+    iter: IntoIter<Option<String>, Properties>,
+}
+
+impl Iterator for SectionIntoIter {
+    type Item = (Option<String>, Properties);
+    fn next(&mut self) -> Option<Self::Item> {
+        self.iter.next()
+    }
+}
+
+impl IntoIterator for Ini {
+    type Item = (Option<String>, Properties);
+    type IntoIter = SectionIntoIter;
+
+    fn into_iter(self) -> SectionIntoIter {
+        SectionIntoIter {
+            iter: self.sections.into_iter(),
+        }
+    }
+}
+
+// Ini parser
+struct Parser<'a> {
+    ch: Option<char>,
+    rdr: Chars<'a>,
+    line: usize,
+    col: usize,
+    literal: bool,
+}
+
+#[derive(Debug)]
+/// Parse error
+pub struct Error {
+    pub line: usize,
+    pub col: usize,
+    pub msg: String,
+}
+
+impl Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}:{} {}", self.line, self.col, self.msg)
+    }
+}
+
+impl error::Error for Error {
+    fn description(&self) -> &str {
+        self.msg.as_str()
+    }
+
+    fn cause(&self) -> Option<&error::Error> {
+        None
+    }
+}
+
+impl<'a> Parser<'a> {
+    // Create a parser
+    pub fn new(rdr: Chars<'a>, literal: bool) -> Parser<'a> {
+        let mut p = Parser {
+            ch: None,
+            line: 0,
+            col: 0,
+            rdr: rdr,
+            literal: literal,
+        };
+        p.bump();
+        p
+    }
+
+    fn eof(&self) -> bool {
+        self.ch.is_none()
+    }
+
+    fn bump(&mut self) {
+        self.ch = self.rdr.next();
+        match self.ch {
+            Some('\n') => {
+                self.line += 1;
+                self.col = 0;
+            }
+            Some(..) => {
+                self.col += 1;
+            }
+            None => {}
+        }
+    }
+
+    fn error<U>(&self, msg: String) -> Result<U, Error> {
+        Err(Error {
+            line: self.line,
+            col: self.col,
+            msg: msg.clone(),
+        })
+    }
+
+    /// Consume all the white space until the end of the line or a tab
+    fn parse_whitespace(&mut self) {
+        while let Some(c) = self.ch {
+            if !c.is_whitespace() && c != '\n' && c != '\t' && c != '\r' {
+                break;
+            }
+            self.bump();
+        }
+    }
+
+    /// Consume all the white space except line break
+    fn parse_whitespace_except_line_break(&mut self) {
+        while let Some(c) = self.ch {
+            if (c == '\n' || c == '\r' || !c.is_whitespace()) && c != '\t' {
+                break;
+            }
+            self.bump();
+        }
+    }
+
+    /// Parse the whole INI input
+    pub fn parse(&mut self) -> Result<Ini, Error> {
+        let mut result = Ini::new();
+        let mut curkey: String = "".into();
+        let mut cursec: Option<String> = None;
+
+        self.parse_whitespace();
+        while let Some(cur_ch) = self.ch {
+            match cur_ch {
+                ';' | '#' => {
+                    self.parse_comment();
+                }
+                '[' => match self.parse_section() {
+                    Ok(sec) => {
+                        let msec = &sec[..].trim();
+                        cursec = Some(msec.to_string());
+                        result
+                            .sections
+                            .entry(cursec.clone())
+                            .or_insert(HashMap::new());
+                        self.bump();
+                    }
+                    Err(e) => return Err(e),
+                },
+                '=' | ':' => {
+                    if (&curkey[..]).is_empty() {
+                        return self.error("Missing key".to_string());
+                    }
+                    match self.parse_val() {
+                        Ok(val) => {
+                            let mval = val[..].trim().to_owned();
+                            let sec = result
+                                .sections
+                                .entry(cursec.clone())
+                                .or_insert(HashMap::new());
+                            sec.insert(curkey, mval);
+                            curkey = "".into();
+                        }
+                        Err(e) => return Err(e),
+                    }
+                }
+                _ => match self.parse_key() {
+                    Ok(key) => {
+                        let mkey: String = key[..].trim().to_owned();
+                        curkey = mkey.into();
+                    }
+                    Err(e) => return Err(e),
+                },
+            }
+
+            self.parse_whitespace();
+        }
+
+        Ok(result)
+    }
+
+    fn parse_comment(&mut self) {
+        while let Some(c) = self.ch {
+            self.bump();
+            if c == '\n' {
+                break;
+            }
+        }
+    }
+
+    fn parse_str_until(&mut self, endpoint: &[Option<char>]) -> Result<String, Error> {
+        let mut result: String = String::new();
+
+        while !endpoint.contains(&self.ch) {
+            match self.ch {
+                None => {
+                    return self.error(format!("Expecting \"{:?}\" but found EOF.", endpoint));
+                }
+                Some('\\') if !self.literal => {
+                    self.bump();
+                    if self.eof() {
+                        return self.error(format!("Expecting \"{:?}\" but found EOF.", endpoint));
+                    }
+                    match self.ch.unwrap() {
+                        '0' => result.push('\0'),
+                        'a' => result.push('\x07'),
+                        'b' => result.push('\x08'),
+                        't' => result.push('\t'),
+                        'r' => result.push('\r'),
+                        'n' => result.push('\n'),
+                        '\n' => (),
+                        'x' => {
+                            // Unicode 4 character
+                            let mut code: String = String::with_capacity(4);
+                            for _ in 0..4 {
+                                self.bump();
+                                if self.eof() {
+                                    return self.error(format!(
+                                        "Expecting \"{:?}\" but found EOF.",
+                                        endpoint
+                                    ));
+                                } else if let Some('\\') = self.ch {
+                                    self.bump();
+                                    if self.ch != Some('\n') {
+                                        return self.error(format!(
+                                            "Expecting \"\\\\n\" but \
+                                             found \"{:?}\".",
+                                            self.ch
+                                        ));
+                                    }
+                                }
+                                code.push(self.ch.unwrap());
+                            }
+                            let r = u32::from_str_radix(&code[..], 16);
+                            match r {
+                                Ok(c) => result.push(char::from_u32(c).unwrap()),
+                                Err(_) => return self.error("Unknown character.".to_string()),
+                            }
+                        }
+                        c => result.push(c),
+                    }
+                }
+                Some(c) => {
+                    result.push(c);
+                }
+            }
+            self.bump();
+        }
+        Ok(result)
+    }
+
+    fn parse_section(&mut self) -> Result<String, Error> {
+        // Skip [
+        self.bump();
+        self.parse_str_until(&[Some(']')])
+    }
+
+    fn parse_key(&mut self) -> Result<String, Error> {
+        self.parse_str_until(&[Some('='), Some(':')])
+    }
+
+    fn parse_val(&mut self) -> Result<String, Error> {
+        self.bump();
+        // Issue #35: Allow empty value
+        self.parse_whitespace_except_line_break();
+
+        match self.ch {
+            None => Ok(String::new()),
+            Some('"') => {
+                self.bump();
+                self.parse_str_until(&[Some('"')]).and_then(|s| {
+                    self.bump(); // Eats the last "
+                    Ok(s)
+                })
+            }
+            Some('\'') => {
+                self.bump();
+                self.parse_str_until(&[Some('\'')]).and_then(|s| {
+                    self.bump(); // Eats the last '
+                    Ok(s)
+                })
+            }
+            _ => self.parse_str_until(&[Some('\n'), Some('\r'), Some(';'), Some('#'), None]),
+        }
+    }
+}
+
+// ------------------------------------------------------------------------------
+
+#[cfg(test)]
+mod test {
+    use ini::*;
+
+    #[test]
+    fn load_from_str_with_valid_input() {
+        let input = "[sec1]\nkey1=val1\nkey2=377\n[sec2]foo=bar\n";
+        let opt = Ini::load_from_str(input);
+        assert!(opt.is_ok());
+
+        let output = opt.unwrap();
+        assert_eq!(output.sections.len(), 2);
+        assert!(output.sections.contains_key(&Some("sec1".into())));
+
+        let sec1 = &output.sections[&Some("sec1".into())];
+        assert_eq!(sec1.len(), 2);
+        let key1: String = "key1".into();
+        assert!(sec1.contains_key(&key1));
+        let key2: String = "key2".into();
+        assert!(sec1.contains_key(&key2));
+        let val1: String = "val1".into();
+        assert_eq!(sec1[&key1], val1);
+        let val2: String = "377".into();
+        assert_eq!(sec1[&key2], val2);
+    }
+
+    #[test]
+    fn load_from_str_without_ending_newline() {
+        let input = "[sec1]\nkey1=val1\nkey2=377\n[sec2]foo=bar";
+        let opt = Ini::load_from_str(input);
+        assert!(opt.is_ok());
+    }
+
+    #[test]
+    fn test_parse_comment() {
+        let input = "; abcdefghijklmn\n";
+        let opt = Ini::load_from_str(input);
+        assert!(opt.is_ok());
+    }
+
+    #[test]
+    fn test_inline_comment() {
+        let input = "
+[section name]
+name = hello # abcdefg
+gender = mail ; abdddd
+";
+        let ini = Ini::load_from_str(input).unwrap();
+        assert_eq!(ini.get_from(Some("section name"), "name").unwrap(), "hello");
+    }
+
+    #[test]
+    fn test_sharp_comment() {
+        let input = "
+[section name]
+name = hello
+# abcdefg
+";
+        let ini = Ini::load_from_str(input).unwrap();
+        assert_eq!(ini.get_from(Some("section name"), "name").unwrap(), "hello");
+    }
+
+    #[test]
+    fn test_iter() {
+        let input = "
+[section name]
+name = hello # abcdefg
+gender = mail ; abdddd
+";
+        let mut ini = Ini::load_from_str(input).unwrap();
+
+        for (_, _) in &mut ini {}
+        for (_, _) in &ini {}
+        for (_, _) in ini {}
+    }
+
+    #[test]
+    fn test_colon() {
+        let input = "
+[section name]
+name: hello # abcdefg
+gender : mail ; abdddd
+";
+        let ini = Ini::load_from_str(input).unwrap();
+        assert_eq!(ini.get_from(Some("section name"), "name").unwrap(), "hello");
+        assert_eq!(
+            ini.get_from(Some("section name"), "gender").unwrap(),
+            "mail"
+        );
+    }
+
+    #[test]
+    fn test_string() {
+        let input = "
+[section name]
+# This is a comment
+Key = \"Value\"
+";
+        let ini = Ini::load_from_str(input).unwrap();
+        assert_eq!(ini.get_from(Some("section name"), "Key").unwrap(), "Value");
+    }
+
+    #[test]
+    fn test_string_multiline() {
+        let input = "
+[section name]
+# This is a comment
+Key = \"Value
+Otherline\"
+";
+        let ini = Ini::load_from_str(input).unwrap();
+        assert_eq!(
+            ini.get_from(Some("section name"), "Key").unwrap(),
+            "Value\nOtherline"
+        );
+    }
+
+    #[test]
+    fn test_string_comment() {
+        let input = "
+[section name]
+# This is a comment
+Key = \"Value   # This is not a comment ; at all\"
+Stuff = Other
+";
+        let ini = Ini::load_from_str(input).unwrap();
+        assert_eq!(
+            ini.get_from(Some("section name"), "Key").unwrap(),
+            "Value   # This is not a comment ; at all"
+        );
+    }
+
+    #[test]
+    fn test_string_single() {
+        let input = "
+[section name]
+# This is a comment
+Key = 'Value'
+Stuff = Other
+";
+        let ini = Ini::load_from_str(input).unwrap();
+        assert_eq!(ini.get_from(Some("section name"), "Key").unwrap(), "Value");
+    }
+
+    #[test]
+    fn test_string_includes_quote() {
+        let input = "
+[Test]
+Comment[tr]=İnternet'e erişin
+Comment[uk]=Доступ до Інтернету
+";
+        let ini = Ini::load_from_str(input).unwrap();
+        assert_eq!(
+            ini.get_from(Some("Test"), "Comment[tr]").unwrap(),
+            "İnternet'e erişin"
+        );
+    }
+
+    #[test]
+    fn test_string_single_multiline() {
+        let input = "
+[section name]
+# This is a comment
+Key = 'Value
+Otherline'
+Stuff = Other
+";
+        let ini = Ini::load_from_str(input).unwrap();
+        assert_eq!(
+            ini.get_from(Some("section name"), "Key").unwrap(),
+            "Value\nOtherline"
+        );
+    }
+
+    #[test]
+    fn test_string_single_comment() {
+        let input = "
+[section name]
+# This is a comment
+Key = 'Value   # This is not a comment ; at all'
+";
+        let ini = Ini::load_from_str(input).unwrap();
+        assert_eq!(
+            ini.get_from(Some("section name"), "Key").unwrap(),
+            "Value   # This is not a comment ; at all"
+        );
+    }
+
+    #[test]
+    fn load_from_str_with_valid_empty_input() {
+        let input = "key1=\nkey2=val2\n";
+        let opt = Ini::load_from_str(input);
+        assert!(opt.is_ok());
+
+        let output = opt.unwrap();
+        assert_eq!(output.sections.len(), 1);
+        assert!(output.sections.contains_key(&None::<String>));
+
+        let sec1 = &output.sections[&None::<String>];
+        assert_eq!(sec1.len(), 2);
+        let key1: String = "key1".into();
+        assert!(sec1.contains_key(&key1));
+        let key2: String = "key2".into();
+        assert!(sec1.contains_key(&key2));
+        let val1: String = "".into();
+        assert_eq!(sec1[&key1], val1);
+        let val2: String = "val2".into();
+        assert_eq!(sec1[&key2], val2);
+    }
+
+    #[test]
+    fn load_from_str_with_crlf() {
+        let input = "key1=val1\r\nkey2=val2\r\n";
+        let opt = Ini::load_from_str(input);
+        assert!(opt.is_ok());
+
+        let output = opt.unwrap();
+        assert_eq!(output.sections.len(), 1);
+        assert!(output.sections.contains_key(&None::<String>));
+        let sec1 = &output.sections[&None::<String>];
+        assert_eq!(sec1.len(), 2);
+        let key1: String = "key1".into();
+        assert!(sec1.contains_key(&key1));
+        let key2: String = "key2".into();
+        assert!(sec1.contains_key(&key2));
+        let val1: String = "val1".into();
+        assert_eq!(sec1[&key1], val1);
+        let val2: String = "val2".into();
+        assert_eq!(sec1[&key2], val2);
+    }
+
+    #[test]
+    fn load_from_str_with_cr() {
+        let input = "key1=val1\rkey2=val2\r";
+        let opt = Ini::load_from_str(input);
+        assert!(opt.is_ok());
+
+        let output = opt.unwrap();
+        assert_eq!(output.sections.len(), 1);
+        assert!(output.sections.contains_key(&None::<String>));
+        let sec1 = &output.sections[&None::<String>];
+        assert_eq!(sec1.len(), 2);
+        let key1: String = "key1".into();
+        assert!(sec1.contains_key(&key1));
+        let key2: String = "key2".into();
+        assert!(sec1.contains_key(&key2));
+        let val1: String = "val1".into();
+        assert_eq!(sec1[&key1], val1);
+        let val2: String = "val2".into();
+        assert_eq!(sec1[&key2], val2);
+    }
+
+    #[test]
+    fn get_with_non_static_key() {
+        let input = "key1=val1\nkey2=val2\n";
+        let opt = Ini::load_from_str(input).unwrap();
+
+        let sec1 = &opt.sections[&None::<String>];
+
+        let key = "key1".to_owned();
+        sec1.get(&key).unwrap();
+    }
+
+    #[test]
+    fn load_from_str_noescape() {
+        let input = "path=C:\\Windows\\Some\\Folder\\";
+        let opt = Ini::load_from_str_noescape(input);
+        assert!(opt.is_ok());
+
+        let output = opt.unwrap();
+        assert_eq!(output.sections.len(), 1);
+        let sec = &output.sections[&None::<String>];
+        assert_eq!(sec.len(), 1);
+        assert!(sec.contains_key("path"));
+        assert_eq!(sec["path"], "C:\\Windows\\Some\\Folder\\");
+    }
+}
diff --git a/third_party/rust/rust-ini/src/lib.rs b/third_party/rust/rust-ini/src/lib.rs
new file mode 100644
index 0000000000..7eab7e6536
--- /dev/null
+++ b/third_party/rust/rust-ini/src/lib.rs
@@ -0,0 +1,47 @@
+// The MIT License (MIT)
+
+// Copyright (c) 2014 Y. T. CHUNG
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy of
+// this software and associated documentation files (the "Software"), to deal in
+// the Software without restriction, including without limitation the rights to
+// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+// the Software, and to permit persons to whom the Software is furnished to do so,
+// subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+//! Ini parser for Rust
+//!
+//! ```no_run
+//! use ini::Ini;
+//!
+//! let mut conf = Ini::new();
+//! conf.with_section(Some("User".to_owned()))
+//!     .set("name", "Raspberry树莓")
+//!     .set("value", "Pi");
+//! conf.with_section(Some("Library".to_owned()))
+//!     .set("name", "Sun Yat-sen U")
+//!     .set("location", "Guangzhou=world");
+//! conf.write_to_file("conf.ini").unwrap();
+//!
+//!
+//! let i = Ini::load_from_file("conf.ini").unwrap();
+//! for (sec, prop) in i.iter() {
+//!    println!("Section: {:?}", *sec);
+//!    for (k, v) in prop.iter() {
+//!        println!("{}:{}", *k, *v);
+//!    }
+//! }
+//! ```
+
+pub use ini::Ini;
+pub mod ini;