Adding upstream version 86.0.1.upstream/86.0.1upstream

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

18 files changed, 2836 insertions, 0 deletions

diff --git a/third_party/rust/winreg/.cargo-checksum.json b/third_party/rust/winreg/.cargo-checksum.json
new file mode 100644
index 0000000000..e5f1631b1f
--- /dev/null
+++ b/third_party/rust/winreg/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.toml":"a1e8f0c4b5eab990649c6963190f190a033bca7035b85f88ea0836bfb10c9348","LICENSE":"ea021d8c6383c84d19c15ce90d3b1602cf448fdcc0bf3772c98e43c7bf1bf1d1","README.md":"137d72ca6c03e6876abb162733b305718591e28ab42f00689cb1bec7dbc38409","appveyor.yml":"986d99d18ffd511d6d4a357109d2b3ded4eea7449f49c339c6ca221064bb3bb0","examples/basic_usage.rs":"de70cb705ab3ccbf3681df106656b6398f9df27d0e7d21f7ef9a1ea51335b0cf","examples/enum.rs":"7e18a35960c824f88a122a4ae67020b44579379c0268fa7f37641b03aacb55cc","examples/installed_apps.rs":"0e210f33218649182276824f6cb461c2085ca9f8ca7c687318405b7896fd4d42","examples/serialization.rs":"b82553788bef12a9164c2a42d9ae99fceaef1e752286219ee8b24374cb5a8b19","examples/transactions.rs":"6fb7d7c7811aadab840b5ba36dfef9e8c19c0f874e02f54f90b73b16f455be70","src/decoder/mod.rs":"68064e7d0312be72152f008593377ac56bdad45fa5a007446a4358fbae17cfd0","src/decoder/serialization_serde.rs":"4fc46761f5139661bdc5fa2c490000701c5df71d1b4803ae41823acad0d0ded6","src/encoder/mod.rs":"2614013d7be54f5f39a21b8e75511e950d703e4571f9a63292ae51507a21c612","src/encoder/serialization_serde.rs":"a03fceb693761257a8bc4f72984e2a551f5a1d86e57fee6acdcc39934b8a9ee4","src/enums.rs":"8117cd8281018e092bb756836a1cc5d2bd826a87f20d9ead67a09c94296649f5","src/lib.rs":"ab3d8696a09a027a784b6baf7a3bbf852a6f029eb3914015c800f2761992f65c","src/transaction.rs":"e6c9d5ae895b3d397ce0436c7dd9562ad60405c8fedd6730e3801d69a9e84e74","src/types.rs":"c16db1ab91b1250ca1c510f20977d5046987764395c0f545a950c5a049428183"},"package":"a27a759395c1195c4cc5cda607ef6f8f6498f64e78f7900f5de0a127a424704a"}
\ No newline at end of file
diff --git a/third_party/rust/winreg/Cargo.toml b/third_party/rust/winreg/Cargo.toml
new file mode 100644
index 0000000000..c5fd651116
--- /dev/null
+++ b/third_party/rust/winreg/Cargo.toml
@@ -0,0 +1,61 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g. crates.io) dependencies
+#
+# If you believe there's an error in this file please file an
+# issue against the rust-lang/cargo repository. If you're
+# editing this file be aware that the upstream Cargo.toml
+# will likely look very different (and much more reasonable)
+
+[package]
+name = "winreg"
+version = "0.5.1"
+authors = ["Igor Shaula <gentoo90@gmail.com>"]
+description = "Rust bindings to MS Windows Registry API"
+documentation = "https://gentoo90.github.io/winreg-rs/v0.5.1/winreg"
+readme = "README.md"
+keywords = ["Windows", "WinSDK", "Registry"]
+categories = ["api-bindings", "os::windows-apis"]
+license = "MIT"
+repository = "https://github.com/gentoo90/winreg-rs"
+
+[[example]]
+name = "basic_usage"
+
+[[example]]
+name = "enum"
+
+[[example]]
+name = "transactions"
+required-features = ["transactions"]
+
+[[example]]
+name = "serialization"
+required-features = ["serialization-serde"]
+
+[[example]]
+name = "installed_apps"
+required-features = ["serialization-serde"]
+[dependencies.clippy]
+version = "^0"
+optional = true
+
+[dependencies.serde]
+version = "1"
+optional = true
+
+[dependencies.winapi]
+version = "0.3"
+features = ["minwindef", "winerror", "winnt", "winreg", "handleapi"]
+[dev-dependencies.rand]
+version = "0.3"
+
+[dev-dependencies.serde_derive]
+version = "1"
+
+[features]
+serialization-serde = ["transactions", "serde"]
+transactions = ["winapi/ktmw32"]
diff --git a/third_party/rust/winreg/LICENSE b/third_party/rust/winreg/LICENSE
new file mode 100644
index 0000000000..b9d358e3e7
--- /dev/null
+++ b/third_party/rust/winreg/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2015 Igor Shaula
+
+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.
diff --git a/third_party/rust/winreg/README.md b/third_party/rust/winreg/README.md
new file mode 100644
index 0000000000..52b1807c5b
--- /dev/null
+++ b/third_party/rust/winreg/README.md
@@ -0,0 +1,271 @@
+winreg [![Crates.io](https://img.shields.io/crates/v/winreg.svg)](https://crates.io/crates/winreg) [![Build status](https://ci.appveyor.com/api/projects/status/f3lwrt67ghrf5omd?svg=true)](https://ci.appveyor.com/project/gentoo90/winreg-rs)
+======
+
+Rust bindings to MS Windows Registry API. Work in progress.
+
+Current features:
+* Basic registry operations:
+    * open/create/delete keys
+    * read and write values
+    * seamless conversion between `REG_*` types and rust primitives
+        * `String` and `OsString` <= `REG_SZ`, `REG_EXPAND_SZ` or `REG_MULTI_SZ`
+        * `String`, `&str` and `OsStr` => `REG_SZ`
+        * `u32` <=> `REG_DWORD`
+        * `u64` <=> `REG_QWORD`
+* Iteration through key names and through values
+* Transactions
+* Transacted serialization of rust types into/from registry (only primitives and structures for now)
+
+## Usage
+
+### Basic usage
+
+```toml
+# Cargo.toml
+[dependencies]
+winreg = "0.5"
+```
+
+```rust
+extern crate winreg;
+use std::path::Path;
+use std::io;
+use winreg::RegKey;
+use winreg::enums::*;
+
+fn main() {
+    println!("Reading some system info...");
+    let hklm = RegKey::predef(HKEY_LOCAL_MACHINE);
+    let cur_ver = hklm.open_subkey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion").unwrap();
+    let pf: String = cur_ver.get_value("ProgramFilesDir").unwrap();
+    let dp: String = cur_ver.get_value("DevicePath").unwrap();
+    println!("ProgramFiles = {}\nDevicePath = {}", pf, dp);
+    let info = cur_ver.query_info().unwrap();
+    println!("info = {:?}", info);
+
+    println!("And now lets write something...");
+    let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+    let path = Path::new("Software").join("WinregRsExample1");
+    let key = hkcu.create_subkey(&path).unwrap();
+
+    key.set_value("TestSZ", &"written by Rust").unwrap();
+    let sz_val: String = key.get_value("TestSZ").unwrap();
+    key.delete_value("TestSZ").unwrap();
+    println!("TestSZ = {}", sz_val);
+
+    key.set_value("TestDWORD", &1234567890u32).unwrap();
+    let dword_val: u32 = key.get_value("TestDWORD").unwrap();
+    println!("TestDWORD = {}", dword_val);
+
+    key.set_value("TestQWORD", &1234567891011121314u64).unwrap();
+    let qword_val: u64 = key.get_value("TestQWORD").unwrap();
+    println!("TestQWORD = {}", qword_val);
+
+    key.create_subkey("sub\\key").unwrap();
+    hkcu.delete_subkey_all(&path).unwrap();
+
+    println!("Trying to open nonexistent key...");
+    let key2 = hkcu.open_subkey(&path)
+    .unwrap_or_else(|e| match e.kind() {
+        io::ErrorKind::NotFound => panic!("Key doesn't exist"),
+        io::ErrorKind::PermissionDenied => panic!("Access denied"),
+        _ => panic!("{:?}", e)
+    });
+}
+```
+
+### Iterators
+
+```rust
+extern crate winreg;
+use winreg::RegKey;
+use winreg::enums::*;
+
+fn main() {
+    println!("File extensions, registered in system:");
+    for i in RegKey::predef(HKEY_CLASSES_ROOT)
+        .enum_keys().map(|x| x.unwrap())
+        .filter(|x| x.starts_with("."))
+    {
+        println!("{}", i);
+    }
+
+    let system = RegKey::predef(HKEY_LOCAL_MACHINE)
+        .open_subkey("HARDWARE\\DESCRIPTION\\System")
+        .unwrap();
+    for (name, value) in system.enum_values().map(|x| x.unwrap()) {
+        println!("{} = {:?}", name, value);
+    }
+}
+```
+
+### Transactions
+
+```toml
+# Cargo.toml
+[dependencies]
+winreg = { version = "0.5", features = ["transactions"] }
+```
+
+```rust
+extern crate winreg;
+use std::io;
+use winreg::RegKey;
+use winreg::enums::*;
+use winreg::transaction::Transaction;
+
+fn main() {
+    let t = Transaction::new().unwrap();
+    let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+    let key = hkcu.create_subkey_transacted("Software\\RustTransaction", &t).unwrap();
+    key.set_value("TestQWORD", &1234567891011121314u64).unwrap();
+    key.set_value("TestDWORD", &1234567890u32).unwrap();
+
+    println!("Commit transaction? [y/N]:");
+    let mut input = String::new();
+    io::stdin().read_line(&mut input).unwrap();
+    input = input.trim_right().to_owned();
+    if input == "y" || input == "Y" {
+        t.commit().unwrap();
+        println!("Transaction committed.");
+    }
+    else {
+        // this is optional, if transaction wasn't committed,
+        // it will be rolled back on disposal
+        t.rollback().unwrap();
+
+        println!("Transaction wasn't committed, it will be rolled back.");
+    }
+}
+```
+
+### Serialization
+
+```toml
+# Cargo.toml
+[dependencies]
+winreg = { version = "0.5", features = ["serialization-serde"] }
+serde = "1"
+serde_derive = "1"
+```
+
+```rust
+#[macro_use]
+extern crate serde_derive;
+extern crate serde;
+extern crate winreg;
+use winreg::enums::*;
+
+#[derive(Debug, Serialize, Deserialize, PartialEq)]
+struct Rectangle{
+    x: u32,
+    y: u32,
+    w: u32,
+    h: u32,
+}
+
+#[derive(Debug, Serialize, Deserialize, PartialEq)]
+struct Test {
+    t_bool: bool,
+    t_u8: u8,
+    t_u16: u16,
+    t_u32: u32,
+    t_u64: u64,
+    t_usize: usize,
+    t_struct: Rectangle,
+    t_string: String,
+    t_i8: i8,
+    t_i16: i16,
+    t_i32: i32,
+    t_i64: i64,
+    t_isize: isize,
+    t_f64: f64,
+    t_f32: f32,
+}
+
+fn main() {
+    let hkcu = winreg::RegKey::predef(HKEY_CURRENT_USER);
+    let key = hkcu.create_subkey("Software\\RustEncode").unwrap();
+    let v1 = Test{
+        t_bool: false,
+        t_u8: 127,
+        t_u16: 32768,
+        t_u32: 123456789,
+        t_u64: 123456789101112,
+        t_usize: 123456789101112,
+        t_struct: Rectangle{
+            x: 55,
+            y: 77,
+            w: 500,
+            h: 300,
+        },
+        t_string: "test 123!".to_owned(),
+        t_i8: -123,
+        t_i16: -2049,
+        t_i32: 20100,
+        t_i64: -12345678910,
+        t_isize: -1234567890,
+        t_f64: -0.01,
+        t_f32: 3.14,
+    };
+
+    key.encode(&v1).unwrap();
+
+    let v2: Test = key.decode().unwrap();
+    println!("Decoded {:?}", v2);
+
+    // This shows `false` because f32 and f64 encoding/decoding is NOT precise
+    println!("Equal to encoded: {:?}", v1 == v2);
+}
+```
+
+## Changelog
+
+### 0.5.1
+
+* Reexport `HKEY` ([#15](https://github.com/gentoo90/winreg-rs/issues/15)).
+* Add `raw_handle` method ([#18](https://github.com/gentoo90/winreg-rs/pull/18)).
+
+### 0.5.0
+
+* Breaking change: `open_subkey` now opens a key with readonly permissions.
+Use `create_subkey` or `open_subkey_with_flags` to open with read-write permissins.
+* Breaking change: features `transactions` and `serialization-serde` are now disabled by default.
+* Breaking change: serialization now uses `serde` instead of `rustc-serialize`.
+* `winreg` updated to `0.3`.
+* Documentation fixes ([#14](https://github.com/gentoo90/winreg-rs/pull/14))
+
+### 0.4.0
+
+* Make transactions and serialization otional features
+* Update dependensies + minor fixes ([#12](https://github.com/gentoo90/winreg-rs/pull/12))
+
+### 0.3.5
+
+* Implement `FromRegValue` for `OsString` and `ToRegValue` for `OsStr` ([#8](https://github.com/gentoo90/winreg-rs/issues/8))
+* Minor fixes
+
+### 0.3.4
+
+* Add `copy_tree` method to `RegKey`
+* Now checked with [rust-clippy](https://github.com/Manishearth/rust-clippy)
+    * no more `unwrap`s
+    * replaced `to_string` with `to_owned`
+* Fix: reading strings longer than 2048 characters ([#6](https://github.com/gentoo90/winreg-rs/pull/6))
+
+### 0.3.3
+
+* Fix: now able to read values longer than 2048 bytes ([#3](https://github.com/gentoo90/winreg-rs/pull/3))
+
+### 0.3.2
+
+* Fix: `FromRegValue` trait now requires `Sized` (fixes build with rust 1.4)
+
+### 0.3.1
+
+* Fix: bump `winapi` version to fix build
+
+### 0.3.0
+
+* Add transactions support and make serialization transacted
+* Breaking change: use `std::io::{Error,Result}` instead of own `RegError` and `RegResult`
diff --git a/third_party/rust/winreg/appveyor.yml b/third_party/rust/winreg/appveyor.yml
new file mode 100644
index 0000000000..24aaf3e279
--- /dev/null
+++ b/third_party/rust/winreg/appveyor.yml
@@ -0,0 +1,28 @@
+version: 0.5.{build}
+pull_requests:
+  do_not_increment_build_number: true
+
+os: Visual Studio 2015
+
+environment:
+  matrix:
+    - TARGET: x86_64-pc-windows-gnu
+      CHANNEL: stable
+    - TARGET: x86_64-pc-windows-msvc
+      CHANNEL: stable
+    - TARGET: i686-pc-windows-gnu
+      CHANNEL: stable
+    - TARGET: i686-pc-windows-msvc
+      CHANNEL: stable
+
+install:
+  - curl -sSf -o rustup-init.exe https://win.rustup.rs
+  - rustup-init.exe --default-host %TARGET% --default-toolchain %CHANNEL% -y
+  - set PATH=%PATH%;C:\Users\appveyor\.cargo\bin
+  - rustc -Vv
+  - cargo -V
+
+build: false
+
+test_script:
+  - cargo test --features=serialization-serde
diff --git a/third_party/rust/winreg/examples/basic_usage.rs b/third_party/rust/winreg/examples/basic_usage.rs
new file mode 100644
index 0000000000..2a7a8c02d3
--- /dev/null
+++ b/third_party/rust/winreg/examples/basic_usage.rs
@@ -0,0 +1,50 @@
+// Copyright 2015, Igor Shaula
+// Licensed under the MIT License <LICENSE or
+// http://opensource.org/licenses/MIT>. This file
+// may not be copied, modified, or distributed
+// except according to those terms.
+extern crate winreg;
+use std::path::Path;
+use std::io;
+use winreg::RegKey;
+use winreg::enums::*;
+
+fn main() {
+    println!("Reading some system info...");
+    let hklm = RegKey::predef(HKEY_LOCAL_MACHINE);
+    let cur_ver = hklm.open_subkey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion").unwrap();
+    let pf: String = cur_ver.get_value("ProgramFilesDir").unwrap();
+    let dp: String = cur_ver.get_value("DevicePath").unwrap();
+    println!("ProgramFiles = {}\nDevicePath = {}", pf, dp);
+    let info = cur_ver.query_info().unwrap();
+    println!("info = {:?}", info);
+
+    println!("And now lets write something...");
+    let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+    let path = Path::new("Software").join("WinregRsExample1");
+    let key = hkcu.create_subkey(&path).unwrap();
+
+    key.set_value("TestSZ", &"written by Rust").unwrap();
+    let sz_val: String = key.get_value("TestSZ").unwrap();
+    key.delete_value("TestSZ").unwrap();
+    println!("TestSZ = {}", sz_val);
+
+    key.set_value("TestDWORD", &1234567890u32).unwrap();
+    let dword_val: u32 = key.get_value("TestDWORD").unwrap();
+    println!("TestDWORD = {}", dword_val);
+
+    key.set_value("TestQWORD", &1234567891011121314u64).unwrap();
+    let qword_val: u64 = key.get_value("TestQWORD").unwrap();
+    println!("TestQWORD = {}", qword_val);
+
+    key.create_subkey("sub\\key").unwrap();
+    hkcu.delete_subkey_all(&path).unwrap();
+
+    println!("Trying to open nonexistent key...");
+    hkcu.open_subkey(&path)
+    .unwrap_or_else(|e| match e.kind() {
+        io::ErrorKind::NotFound => panic!("Key doesn't exist"),
+        io::ErrorKind::PermissionDenied => panic!("Access denied"),
+        _ => panic!("{:?}", e)
+    });
+}
diff --git a/third_party/rust/winreg/examples/enum.rs b/third_party/rust/winreg/examples/enum.rs
new file mode 100644
index 0000000000..9940cfc477
--- /dev/null
+++ b/third_party/rust/winreg/examples/enum.rs
@@ -0,0 +1,25 @@
+// Copyright 2015, Igor Shaula
+// Licensed under the MIT License <LICENSE or
+// http://opensource.org/licenses/MIT>. This file
+// may not be copied, modified, or distributed
+// except according to those terms.
+extern crate winreg;
+use winreg::RegKey;
+use winreg::enums::*;
+
+fn main() {
+    println!("File extensions, registered in system:");
+    for i in RegKey::predef(HKEY_CLASSES_ROOT)
+        .enum_keys().map(|x| x.unwrap())
+        .filter(|x| x.starts_with("."))
+    {
+        println!("{}", i);
+    }
+
+    let system = RegKey::predef(HKEY_LOCAL_MACHINE)
+        .open_subkey("HARDWARE\\DESCRIPTION\\System")
+        .unwrap();
+    for (name, value) in system.enum_values().map(|x| x.unwrap()) {
+        println!("{} = {:?}", name, value);
+    }
+}
diff --git a/third_party/rust/winreg/examples/installed_apps.rs b/third_party/rust/winreg/examples/installed_apps.rs
new file mode 100644
index 0000000000..f7d555b90d
--- /dev/null
+++ b/third_party/rust/winreg/examples/installed_apps.rs
@@ -0,0 +1,43 @@
+// Copyright 2017, Igor Shaula
+// Licensed under the MIT License <LICENSE or
+// http://opensource.org/licenses/MIT>. This file
+// may not be copied, modified, or distributed
+// except according to those terms.
+#[macro_use]
+extern crate serde_derive;
+extern crate winreg;
+use winreg::enums::*;
+use std::collections::HashMap;
+use std::fmt;
+
+#[allow(non_snake_case)]
+#[derive(Debug, Serialize, Deserialize)]
+struct InstalledApp {
+    DisplayName: Option<String>,
+    DisplayVersion: Option<String>,
+    UninstallString: Option<String>
+}
+
+macro_rules! str_from_opt {
+    ($s:expr) => { $s.as_ref().map(|x| &**x).unwrap_or("") }
+}
+
+impl fmt::Display for InstalledApp {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}-{}",
+            str_from_opt!(self.DisplayName),
+            str_from_opt!(self.DisplayVersion))
+    }
+}
+
+fn main() {
+    let hklm = winreg::RegKey::predef(HKEY_LOCAL_MACHINE);
+    let uninstall_key = hklm.open_subkey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall")
+        .expect("key is missing");
+
+    let apps: HashMap<String, InstalledApp> = uninstall_key.decode().expect("deserialization failed");
+
+    for (_k, v) in &apps {
+        println!("{}", v);
+    }
+}
diff --git a/third_party/rust/winreg/examples/serialization.rs b/third_party/rust/winreg/examples/serialization.rs
new file mode 100644
index 0000000000..bc8c5c7ee9
--- /dev/null
+++ b/third_party/rust/winreg/examples/serialization.rs
@@ -0,0 +1,81 @@
+// Copyright 2015, Igor Shaula
+// Licensed under the MIT License <LICENSE or
+// http://opensource.org/licenses/MIT>. This file
+// may not be copied, modified, or distributed
+// except according to those terms.
+#[macro_use]
+extern crate serde_derive;
+extern crate winreg;
+use winreg::enums::*;
+
+#[derive(Debug, Serialize, Deserialize, PartialEq)]
+struct Coords {
+    x: u32,
+    y: u32,
+}
+
+#[derive(Debug, Serialize, Deserialize, PartialEq)]
+struct Size {
+    w: u32,
+    h: u32,
+}
+
+#[derive(Debug, Serialize, Deserialize, PartialEq)]
+struct Rectangle {
+    coords: Coords,
+    size: Size,
+}
+
+#[derive(Debug, Serialize, Deserialize, PartialEq)]
+struct Test {
+    t_bool: bool,
+    t_u8: u8,
+    t_u16: u16,
+    t_u32: u32,
+    t_u64: u64,
+    t_usize: usize,
+    t_struct: Rectangle,
+    t_string: String,
+    t_i8: i8,
+    t_i16: i16,
+    t_i32: i32,
+    t_i64: i64,
+    t_isize: isize,
+    t_f64: f64,
+    t_f32: f32,
+    // t_char: char,
+}
+
+fn main() {
+    let hkcu = winreg::RegKey::predef(HKEY_CURRENT_USER);
+    let key = hkcu.create_subkey("Software\\RustEncode").unwrap();
+    let v1 = Test{
+        t_bool: false,
+        t_u8: 127,
+        t_u16: 32768,
+        t_u32: 123456789,
+        t_u64: 123456789101112,
+        t_usize: 1234567891,
+        t_struct: Rectangle{
+            coords: Coords{ x: 55, y: 77 },
+            size: Size{ w: 500, h: 300 },
+        },
+        t_string: "test 123!".to_owned(),
+        t_i8: -123,
+        t_i16: -2049,
+        t_i32: 20100,
+        t_i64: -12345678910,
+        t_isize: -1234567890,
+        t_f64: -0.01,
+        t_f32: 3.14,
+        // t_char: 'a',
+    };
+
+    key.encode(&v1).unwrap();
+
+    let v2: Test = key.decode().unwrap();
+    println!("Decoded {:?}", v2);
+
+    // This shows `false` because f32 and f64 encoding/decoding is NOT precise
+    println!("Equal to encoded: {:?}", v1 == v2);
+}
diff --git a/third_party/rust/winreg/examples/transactions.rs b/third_party/rust/winreg/examples/transactions.rs
new file mode 100644
index 0000000000..9824f1b62e
--- /dev/null
+++ b/third_party/rust/winreg/examples/transactions.rs
@@ -0,0 +1,34 @@
+// Copyright 2015, Igor Shaula
+// Licensed under the MIT License <LICENSE or
+// http://opensource.org/licenses/MIT>. This file
+// may not be copied, modified, or distributed
+// except according to those terms.
+extern crate winreg;
+use std::io;
+use winreg::RegKey;
+use winreg::enums::*;
+use winreg::transaction::Transaction;
+
+fn main() {
+    let t = Transaction::new().unwrap();
+    let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+    let key = hkcu.create_subkey_transacted("Software\\RustTransaction", &t).unwrap();
+    key.set_value("TestQWORD", &1234567891011121314u64).unwrap();
+    key.set_value("TestDWORD", &1234567890u32).unwrap();
+
+    println!("Commit transaction? [y/N]:");
+    let mut input = String::new();
+    io::stdin().read_line(&mut input).unwrap();
+    input = input.trim_right().to_owned();
+    if input == "y" || input == "Y" {
+        t.commit().unwrap();
+        println!("Transaction commited.");
+    }
+    else {
+        // this is optional, if transaction wasn't commited,
+        // it will be rolled back on disposal
+        t.rollback().unwrap();
+
+        println!("Transaction wasn't commited, it will be rolled back.");
+    }
+}
diff --git a/third_party/rust/winreg/src/decoder/mod.rs b/third_party/rust/winreg/src/decoder/mod.rs
new file mode 100644
index 0000000000..e832050a7e
--- /dev/null
+++ b/third_party/rust/winreg/src/decoder/mod.rs
@@ -0,0 +1,111 @@
+// Copyright 2017, Igor Shaula
+// Licensed under the MIT License <LICENSE or
+// http://opensource.org/licenses/MIT>. This file
+// may not be copied, modified, or distributed
+// except according to those terms.
+use std::io;
+use std::fmt;
+use std::error::Error;
+use winapi::shared::minwindef::DWORD;
+use super::{RegKey};
+use super::enums::*;
+
+macro_rules! read_value{
+    ($s:ident) => (
+        match mem::replace(&mut $s.f_name, None) {
+            Some(ref s) => {
+                $s.key.get_value(s)
+                    .map_err(DecoderError::IoError)
+            },
+            None => Err(DecoderError::NoFieldName)
+        }
+    )
+}
+
+macro_rules! parse_string{
+    ($s:ident) => ({
+        let s: String = read_value!($s)?;
+        s.parse().map_err(|e| DecoderError::ParseError(format!("{:?}", e)))
+    })
+}
+
+macro_rules! no_impl {
+    ($e:expr) => (
+        Err(DecoderError::DecodeNotImplemented($e.to_owned()))
+    )
+}
+
+#[cfg(feature = "serialization-serde")] mod serialization_serde;
+
+#[derive(Debug)]
+pub enum DecoderError{
+    DecodeNotImplemented(String),
+    DeserializerError(String),
+    IoError(io::Error),
+    ParseError(String),
+    NoFieldName,
+}
+
+impl fmt::Display for DecoderError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:?}", self)
+    }
+}
+
+impl Error for DecoderError {
+    fn description(&self) -> &str {
+        use self::DecoderError::*;
+        match *self {
+            DecodeNotImplemented(ref s) | DeserializerError(ref s) | ParseError(ref s) => s,
+            IoError(ref e) => e.description(),
+            NoFieldName => "No field name"
+        }
+    }
+}
+
+impl From<io::Error> for DecoderError {
+    fn from(err: io::Error) -> DecoderError {
+        DecoderError::IoError(err)
+    }
+}
+
+pub type DecodeResult<T> = Result<T, DecoderError>;
+
+#[derive(Debug)]
+enum DecoderReadingState {
+    WaitingForKey,
+    WaitingForValue,
+}
+
+#[derive(Debug)]
+enum DecoderEnumerationState {
+    EnumeratingKeys(DWORD),
+    EnumeratingValues(DWORD),
+}
+
+#[derive(Debug)]
+pub struct Decoder {
+    key: RegKey,
+    f_name: Option<String>,
+    reading_state: DecoderReadingState,
+    enumeration_state: DecoderEnumerationState,
+}
+
+const DECODER_SAM: DWORD = KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS;
+
+impl Decoder {
+    pub fn from_key(key: &RegKey) -> DecodeResult<Decoder> {
+        key.open_subkey_with_flags("", DECODER_SAM)
+            .map(Decoder::new)
+            .map_err(DecoderError::IoError)
+    }
+
+    fn new(key: RegKey) -> Decoder {
+        Decoder{
+            key: key,
+            f_name: None,
+            reading_state: DecoderReadingState::WaitingForKey,
+            enumeration_state: DecoderEnumerationState::EnumeratingKeys(0)
+        }
+    }
+}
diff --git a/third_party/rust/winreg/src/decoder/serialization_serde.rs b/third_party/rust/winreg/src/decoder/serialization_serde.rs
new file mode 100644
index 0000000000..0c8aec5984
--- /dev/null
+++ b/third_party/rust/winreg/src/decoder/serialization_serde.rs
@@ -0,0 +1,221 @@
+// Copyright 2017, Igor Shaula
+// Licensed under the MIT License <LICENSE or
+// http://opensource.org/licenses/MIT>. This file
+// may not be copied, modified, or distributed
+// except according to those terms.
+use std::mem;
+use std::fmt;
+use serde::de::*;
+use super::{DecoderError, DecodeResult, DecoderReadingState, DecoderEnumerationState, Decoder, DECODER_SAM};
+use super::super::FromRegValue;
+
+impl Error for DecoderError {
+    fn custom<T: fmt::Display>(msg: T) -> Self {
+        DecoderError::DeserializerError(format!("{}", msg))
+    }
+}
+
+impl<'de, 'a> Deserializer<'de> for &'a mut Decoder {
+    type Error = DecoderError;
+    fn deserialize_any<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        use self::DecoderEnumerationState::*;
+        match self.enumeration_state {
+            EnumeratingKeys(..) => no_impl!("deserialize_any for keys"),
+            EnumeratingValues(..) => {
+                let s = self.f_name.as_ref().ok_or(DecoderError::NoFieldName)?;
+                let v = self.key.get_raw_value(s)?;
+                use RegType::*;
+                match v.vtype {
+                    REG_SZ | REG_EXPAND_SZ | REG_MULTI_SZ => visitor.visit_string(String::from_reg_value(&v)?),
+                    REG_DWORD => visitor.visit_u32(u32::from_reg_value(&v)?),
+                    REG_QWORD => visitor.visit_u64(u64::from_reg_value(&v)?),
+                    _ => Err(DecoderError::DecodeNotImplemented("value type deserialization not implemented".to_owned()))
+                }
+            }
+        }
+    }
+
+    fn deserialize_bool<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        visitor.visit_bool(read_value!(self).map(|v: u32| v > 0)?)
+    }
+
+    fn deserialize_u8<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        self.deserialize_u32(visitor)
+    }
+
+    fn deserialize_u16<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        self.deserialize_u32(visitor)
+    }
+
+    fn deserialize_u32<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        visitor.visit_u32(read_value!(self)?)
+    }
+
+    fn deserialize_u64<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        visitor.visit_u64(read_value!(self)?)
+    }
+
+    fn deserialize_i8<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        visitor.visit_i8(parse_string!(self)?)
+    }
+
+    fn deserialize_i16<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        visitor.visit_i16(parse_string!(self)?)
+    }
+
+    fn deserialize_i32<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        visitor.visit_i32(parse_string!(self)?)
+    }
+
+    fn deserialize_i64<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        visitor.visit_i64(parse_string!(self)?)
+    }
+
+    fn deserialize_f32<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        visitor.visit_f32(parse_string!(self)?)
+    }
+
+    fn deserialize_f64<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        visitor.visit_f64(parse_string!(self)?)
+    }
+
+    fn deserialize_char<V>(self, _visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        no_impl!("deserialize_char")
+    }
+
+    fn deserialize_str<V>(self, _visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        no_impl!("deserialize_str")
+    }
+
+    fn deserialize_string<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        use self::DecoderReadingState::*;
+        match self.reading_state {
+            WaitingForKey => {
+                let s = self.f_name.as_ref().ok_or(DecoderError::NoFieldName)?;
+                visitor.visit_string(s.clone())
+            }
+            WaitingForValue => visitor.visit_string(read_value!(self)?)
+        }
+    }
+
+    fn deserialize_bytes<V>(self, _visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        no_impl!("deserialize_bytes")
+    }
+
+    fn deserialize_byte_buf<V>(self, _visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        no_impl!("deserialize_byte_buf")
+    }
+
+    fn deserialize_option<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        let v = {
+            let s = self.f_name.as_ref().ok_or(DecoderError::NoFieldName)?;
+            self.key.get_raw_value(s)
+        };
+        match v {
+            Ok(..) => visitor.visit_some(&mut *self),
+            Err(..) => visitor.visit_none()
+        }
+    }
+
+    fn deserialize_unit<V>(self, _visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        no_impl!("deserialize_unit")
+    }
+
+    fn deserialize_unit_struct<V>(self, _name: &'static str, _visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        no_impl!("deserialize_unit_struct")
+    }
+
+    fn deserialize_newtype_struct<V>(self, _name: &'static str, _visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        no_impl!("deserialize_newtype_struct")
+    }
+
+    fn deserialize_seq<V>(self, _visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        no_impl!("deserialize_seq")
+    }
+
+    fn deserialize_tuple<V>(self, _len: usize, _visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        no_impl!("deserialize_tuple")
+    }
+
+    fn deserialize_tuple_struct<V>(self, _name: &'static str, _len: usize, _visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        no_impl!("deserialize_tuple_struct")
+    }
+
+    fn deserialize_map<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        visitor.visit_map(self)
+    }
+
+    fn deserialize_struct<V>(self, _name: &'static str, _fields: &'static [&'static str], visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        visitor.visit_map(self)
+    }
+
+    fn deserialize_identifier<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        self.deserialize_string(visitor)
+    }
+
+    fn deserialize_enum<V>(self, _name: &'static str, _variants: &'static [&'static str], _visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        no_impl!("deserialize_enum")
+    }
+
+    fn deserialize_ignored_any<V>(self, visitor: V) -> DecodeResult<V::Value> where V: Visitor<'de> {
+        self.deserialize_any(visitor)
+    }
+}
+
+impl<'de, 'a> MapAccess<'de> for Decoder {
+    type Error = DecoderError;
+    fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>, Self::Error>
+        where K: DeserializeSeed<'de>
+    {
+        self.reading_state = DecoderReadingState::WaitingForKey;
+        use self::DecoderEnumerationState::*;
+        match self.enumeration_state {
+            EnumeratingKeys(index) => {
+                match self.key.enum_key(index) {
+                    Some(res) => {
+                        self.f_name = Some(res?);
+                        self.enumeration_state = EnumeratingKeys(index + 1);
+                        seed.deserialize(&mut *self).map(Some)
+                    }
+                    None => {
+                        self.enumeration_state = EnumeratingValues(0);
+                        self.next_key_seed(seed)
+                    }
+                }
+            }
+            EnumeratingValues(index) => {
+                let next_value = self.key.enum_value(index);
+                match next_value {
+                    Some(res) => {
+                        self.f_name = Some(res?.0);
+                        self.enumeration_state = EnumeratingValues(index + 1);
+                        seed.deserialize(&mut *self).map(Some)
+                    }
+                    None => Ok(None),
+                }
+            }
+        }
+    }
+
+    fn next_value_seed<V>(&mut self, seed: V) -> Result<V::Value, Self::Error>
+        where V: DeserializeSeed<'de>
+    {
+        self.reading_state = DecoderReadingState::WaitingForValue;
+        use self::DecoderEnumerationState::*;
+        match self.enumeration_state {
+            EnumeratingKeys(..) => {
+                let f_name = self.f_name.as_ref().ok_or(DecoderError::NoFieldName)?;
+                match self.key.open_subkey_with_flags(f_name, DECODER_SAM) {
+                    Ok(subkey) => {
+                        let mut nested = Decoder::new(subkey);
+                        seed.deserialize(&mut nested)
+                    }
+                    Err(err) => Err(DecoderError::IoError(err)),
+                }
+            },
+            EnumeratingValues(..) => {
+                seed.deserialize(&mut *self)
+            }
+        }
+    }
+}
diff --git a/third_party/rust/winreg/src/encoder/mod.rs b/third_party/rust/winreg/src/encoder/mod.rs
new file mode 100644
index 0000000000..dcb178397b
--- /dev/null
+++ b/third_party/rust/winreg/src/encoder/mod.rs
@@ -0,0 +1,105 @@
+// Copyright 2017, Igor Shaula
+// Licensed under the MIT License <LICENSE or
+// http://opensource.org/licenses/MIT>. This file
+// may not be copied, modified, or distributed
+// except according to those terms.
+use std::io;
+use std::fmt;
+use std::error::Error;
+use winapi::shared::minwindef::DWORD;
+use super::RegKey;
+use super::enums::*;
+use super::transaction::Transaction;
+use self::EncoderState::*;
+
+macro_rules! emit_value{
+    ($s:ident, $v:ident) => (
+        match mem::replace(&mut $s.state, Start) {
+            NextKey(ref s) => {
+                $s.keys[$s.keys.len()-1].set_value(s, &$v)
+                    .map_err(EncoderError::IoError)
+            },
+            Start => Err(EncoderError::NoFieldName)
+        }
+    )
+}
+
+macro_rules! no_impl {
+    ($e:expr) => (
+        Err(EncoderError::EncodeNotImplemented($e.to_owned()))
+    )
+}
+
+#[cfg(feature = "serialization-serde")] mod serialization_serde;
+
+#[derive(Debug)]
+pub enum EncoderError{
+    EncodeNotImplemented(String),
+    SerializerError(String),
+    IoError(io::Error),
+    NoFieldName,
+}
+
+impl fmt::Display for EncoderError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:?}", self)
+    }
+}
+
+impl Error for EncoderError {
+    fn description(&self) -> &str {
+        use self::EncoderError::*;
+        match *self {
+            EncodeNotImplemented(ref s) | SerializerError(ref s) => s,
+            IoError(ref e) => e.description(),
+            NoFieldName => "No field name"
+        }
+    }
+}
+
+pub type EncodeResult<T> = Result<T, EncoderError>;
+
+impl From<io::Error> for EncoderError {
+    fn from(err: io::Error) -> EncoderError {
+        EncoderError::IoError(err)
+    }
+}
+
+#[derive(Debug)]
+enum EncoderState {
+    Start,
+    NextKey(String),
+    // NextMapKey,
+}
+
+#[derive(Debug)]
+pub struct Encoder {
+    keys: Vec<RegKey>,
+    tr: Transaction,
+    state: EncoderState,
+}
+
+const ENCODER_SAM: DWORD = KEY_CREATE_SUB_KEY|KEY_SET_VALUE;
+
+impl Encoder {
+    pub fn from_key(key: &RegKey) -> EncodeResult<Encoder> {
+        let tr = try!(Transaction::new());
+        key.open_subkey_transacted_with_flags("", &tr, ENCODER_SAM)
+            .map(|k| Encoder::new(k, tr))
+            .map_err(EncoderError::IoError)
+    }
+
+    fn new(key: RegKey, tr: Transaction) -> Encoder {
+        let mut keys = Vec::with_capacity(5);
+        keys.push(key);
+        Encoder{
+            keys: keys,
+            tr: tr,
+            state: Start,
+        }
+    }
+
+    pub fn commit(&mut self) -> EncodeResult<()> {
+        self.tr.commit().map_err(EncoderError::IoError)
+    }
+}
diff --git a/third_party/rust/winreg/src/encoder/serialization_serde.rs b/third_party/rust/winreg/src/encoder/serialization_serde.rs
new file mode 100644
index 0000000000..d46ba31836
--- /dev/null
+++ b/third_party/rust/winreg/src/encoder/serialization_serde.rs
@@ -0,0 +1,312 @@
+// Copyright 2017, Igor Shaula
+// Licensed under the MIT License <LICENSE or
+// http://opensource.org/licenses/MIT>. This file
+// may not be copied, modified, or distributed
+// except according to those terms.
+use std::fmt;
+use std::mem;
+use super::{Encoder, EncoderError, EncodeResult, ENCODER_SAM};
+use super::EncoderState::*;
+use serde::ser::*;
+
+impl Error for EncoderError {
+    fn custom<T: fmt::Display>(msg: T) -> Self {
+        EncoderError::SerializerError(format!("{}", msg))
+    }
+}
+
+
+impl<'a> Serializer for &'a mut Encoder {
+    type Ok = ();
+    type Error = EncoderError;
+
+    type SerializeSeq = SeqEncoder;
+    type SerializeTuple = TupleEncoder;
+    type SerializeTupleStruct = TupleStructEncoder;
+    type SerializeTupleVariant = TupleVariantEncoder;
+    type SerializeMap = MapEncoder<'a>;
+    type SerializeStruct = StructEncoder<'a>;
+    type SerializeStructVariant = StructVariantEncoder;
+
+    fn serialize_bool(self, value: bool) -> EncodeResult<Self::Ok> {
+        self.serialize_u32(value as u32)
+    }
+
+    fn serialize_i8(self, value: i8) -> EncodeResult<Self::Ok> {
+        self.serialize_i64(value as i64)
+    }
+
+    fn serialize_i16(self, value: i16) -> EncodeResult<Self::Ok> {
+        self.serialize_i64(value as i64)
+    }
+
+    fn serialize_i32(self, value: i32) -> EncodeResult<Self::Ok> {
+        self.serialize_i64(value as i64)
+    }
+
+    fn serialize_i64(self, value: i64) -> EncodeResult<Self::Ok> {
+        let s = value.to_string();
+        emit_value!(self, s)
+    }
+
+    fn serialize_u8(self, value: u8) -> EncodeResult<Self::Ok> {
+        self.serialize_u32(value as u32)
+    }
+
+    fn serialize_u16(self, value: u16) -> EncodeResult<Self::Ok> {
+        self.serialize_u32(value as u32)
+    }
+
+    fn serialize_u32(self, value: u32) -> EncodeResult<Self::Ok> {
+        emit_value!(self, value)
+    }
+
+    fn serialize_u64(self, value: u64) -> EncodeResult<Self::Ok> {
+        emit_value!(self, value)
+    }
+
+    fn serialize_f32(self, value: f32) -> EncodeResult<Self::Ok> {
+        let s = value.to_string();
+        emit_value!(self, s)
+    }
+
+    fn serialize_f64(self, value: f64) -> EncodeResult<Self::Ok> {
+        let s = value.to_string();
+        emit_value!(self, s)
+    }
+
+    fn serialize_char(self, _value: char) -> EncodeResult<Self::Ok> {
+        no_impl!("serialize_char")
+    }
+
+    fn serialize_str(self, value: &str) -> EncodeResult<Self::Ok> {
+        emit_value!(self, value)
+    }
+
+    fn serialize_bytes(self, _value: &[u8]) -> EncodeResult<Self::Ok> {
+        no_impl!("serialize_bytes")
+    }
+
+    fn serialize_none(self) -> EncodeResult<Self::Ok> {
+        no_impl!("serialize_none")
+    }
+
+    fn serialize_some<T: ?Sized + Serialize>(self, _value: &T) -> EncodeResult<Self::Ok> {
+        no_impl!("serialize_some")
+    }
+
+    fn serialize_unit(self) -> EncodeResult<Self::Ok> {
+        no_impl!("serialize_unit")
+    }
+
+    fn serialize_unit_struct(self, _name: &'static str) -> EncodeResult<Self::Ok> {
+        no_impl!("serialize_unit_struct")
+    }
+
+    fn serialize_unit_variant(self,
+                              _name: &'static str,
+                              _variant_index: u32,
+                              _variant: &'static str)
+                              -> EncodeResult<Self::Ok> {
+        no_impl!("serialize_unit_variant")
+    }
+
+    fn serialize_newtype_struct<T: ?Sized + Serialize>(self,
+                                                       _name: &'static str,
+                                                       _value: &T)
+                                                       -> EncodeResult<Self::Ok> {
+        no_impl!("serialize_newtype_struct")
+    }
+
+    fn serialize_newtype_variant<T: ?Sized + Serialize>(self,
+                                                        _name: &'static str,
+                                                        _variant_index: u32,
+                                                        _variant: &'static str,
+                                                        _value: &T)
+                                                        -> EncodeResult<Self::Ok> {
+        no_impl!("serialize_newtype_variant")
+    }
+
+    fn serialize_seq(self, _len: Option<usize>) -> EncodeResult<Self::SerializeSeq> {
+        no_impl!("serialize_seq")
+    }
+
+    fn serialize_tuple(self, _len: usize) -> EncodeResult<Self::SerializeTuple> {
+        no_impl!("serialize_tuple")
+    }
+
+    fn serialize_tuple_struct(self,
+                              _name: &'static str,
+                              _len: usize)
+                              -> EncodeResult<Self::SerializeTupleStruct> {
+        no_impl!("serialize_tuple_struct")
+    }
+
+    fn serialize_tuple_variant(self,
+                               _name: &'static str,
+                               _variant_index: u32,
+                               _variant: &'static str,
+                               _len: usize)
+                               -> EncodeResult<Self::SerializeTupleVariant> {
+        no_impl!("serialize_tuple_variant")
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> EncodeResult<Self::SerializeMap> {
+        Ok(MapEncoder { _enc: self })
+    }
+
+    fn serialize_struct(self,
+                        _name: &'static str,
+                        _len: usize)
+                        -> EncodeResult<Self::SerializeStruct> {
+        match mem::replace(&mut self.state, Start) {
+            Start => {
+                // root structure
+                Ok(StructEncoder { enc: self, is_root: true })
+            }
+            NextKey(ref s) => {
+                // nested structure
+                match self.keys[self.keys.len() - 1]
+                    .create_subkey_transacted_with_flags(&s, &self.tr, ENCODER_SAM) {
+                    Ok(subkey) => {
+                        self.keys.push(subkey);
+                        Ok(StructEncoder { enc: self, is_root: true })
+                    }
+                    Err(err) => Err(EncoderError::IoError(err)),
+                }
+            }
+        }
+    }
+
+    fn serialize_struct_variant(self,
+                                _name: &'static str,
+                                _variant_index: u32,
+                                _variant: &'static str,
+                                _len: usize)
+                                -> EncodeResult<Self::SerializeStructVariant> {
+        no_impl!("serialize_struct_variant")
+    }
+}
+
+pub struct SeqEncoder {}
+
+impl SerializeSeq for SeqEncoder {
+    type Ok = ();
+    type Error = EncoderError;
+    fn serialize_element<T: ?Sized + Serialize>(&mut self, _value: &T) -> EncodeResult<Self::Ok> {
+        no_impl!("SerializeSeq::serialize_element")
+    }
+    fn end(self) -> EncodeResult<Self::Ok> {
+        no_impl!("SerializeSeq::end")
+    }
+}
+
+pub struct TupleEncoder {}
+
+impl SerializeTuple for TupleEncoder {
+    type Ok = ();
+    type Error = EncoderError;
+
+    fn serialize_element<T: ?Sized + Serialize>(&mut self, _value: &T) -> EncodeResult<Self::Ok> {
+        no_impl!("SerializeTuple::serialize_element")
+    }
+
+    fn end(self) -> EncodeResult<Self::Ok> {
+        no_impl!("SerializeTuple::end")
+    }
+}
+
+pub struct TupleStructEncoder {}
+
+impl SerializeTupleStruct for TupleStructEncoder {
+    type Ok = ();
+    type Error = EncoderError;
+
+    fn serialize_field<T: ?Sized + Serialize>(&mut self, _value: &T) -> EncodeResult<Self::Ok> {
+        no_impl!("SerializeTupleStruct::serialize_field")
+    }
+
+    fn end(self) -> EncodeResult<Self::Ok> {
+        no_impl!("SerializeTupleStruct::end")
+    }
+}
+
+pub struct TupleVariantEncoder {}
+
+impl SerializeTupleVariant for TupleVariantEncoder {
+    type Ok = ();
+    type Error = EncoderError;
+
+    fn serialize_field<T: ?Sized + Serialize>(&mut self, _value: &T) -> EncodeResult<Self::Ok> {
+        no_impl!("SerializeTupleVariant::serialize_field")
+    }
+
+    fn end(self) -> EncodeResult<Self::Ok> {
+        no_impl!("SerializeTupleVariant::end")
+    }
+}
+
+pub struct MapEncoder<'a> {
+    _enc: &'a mut Encoder,
+}
+
+impl<'a> SerializeMap for MapEncoder<'a> {
+    type Ok = ();
+    type Error = EncoderError;
+
+    fn serialize_key<T: ?Sized + Serialize>(&mut self, _key: &T) -> EncodeResult<Self::Ok> {
+        no_impl!("SerializeMap::serialize_key")
+    }
+
+    fn serialize_value<T: ?Sized + Serialize>(&mut self, _value: &T) -> EncodeResult<Self::Ok> {
+        no_impl!("SerializeMap::serialize_value")
+    }
+
+    fn end(self) -> EncodeResult<Self::Ok> {
+        no_impl!("SerializeMap::end")
+    }
+}
+
+pub struct StructEncoder<'a> {
+    enc: &'a mut Encoder,
+    is_root: bool
+}
+
+impl<'a> SerializeStruct for StructEncoder<'a> {
+    type Ok = ();
+    type Error = EncoderError;
+
+    fn serialize_field<T: ?Sized + Serialize>(&mut self,
+                                              key: &'static str,
+                                              value: &T)
+                                              -> EncodeResult<Self::Ok> {
+        self.enc.state = NextKey(String::from(key));
+        value.serialize(&mut *self.enc)
+    }
+
+    fn end(self) -> EncodeResult<Self::Ok> {
+        if self.is_root {
+            self.enc.keys.pop();
+        }
+        Ok(())
+    }
+}
+
+pub struct StructVariantEncoder {}
+
+impl SerializeStructVariant for StructVariantEncoder {
+    type Ok = ();
+    type Error = EncoderError;
+
+    fn serialize_field<T: ?Sized + Serialize>(&mut self,
+                                              _key: &'static str,
+                                              _value: &T)
+                                              -> EncodeResult<Self::Ok> {
+        no_impl!("SerializeStructVariant::serialize_field")
+    }
+
+    fn end(self) -> EncodeResult<Self::Ok> {
+        no_impl!("SerializeStructVariant::end")
+    }
+}
+
diff --git a/third_party/rust/winreg/src/enums.rs b/third_party/rust/winreg/src/enums.rs
new file mode 100644
index 0000000000..00518cb447
--- /dev/null
+++ b/third_party/rust/winreg/src/enums.rs
@@ -0,0 +1,58 @@
+// Copyright 2015, Igor Shaula
+// Licensed under the MIT License <LICENSE or
+// http://opensource.org/licenses/MIT>. This file
+// may not be copied, modified, or distributed
+// except according to those terms.
+
+//! `use winreg::enums::*;` to import all needed enumerations and constants
+use super::winapi;
+pub use winapi::um::winreg::{HKEY_CLASSES_ROOT,
+                 HKEY_CURRENT_USER,
+                 HKEY_LOCAL_MACHINE,
+                 HKEY_USERS,
+                 HKEY_PERFORMANCE_DATA,
+                 HKEY_PERFORMANCE_TEXT,
+                 HKEY_PERFORMANCE_NLSTEXT,
+                 HKEY_CURRENT_CONFIG,
+                 HKEY_DYN_DATA,
+                 HKEY_CURRENT_USER_LOCAL_SETTINGS};
+pub use winapi::um::winnt::{KEY_QUERY_VALUE,
+                 KEY_SET_VALUE,
+                 KEY_CREATE_SUB_KEY,
+                 KEY_ENUMERATE_SUB_KEYS,
+                 KEY_NOTIFY,
+                 KEY_CREATE_LINK,
+                 KEY_WOW64_32KEY,
+                 KEY_WOW64_64KEY,
+                 KEY_WOW64_RES,
+                 KEY_READ,
+                 KEY_WRITE,
+                 KEY_EXECUTE,
+                 KEY_ALL_ACCESS};
+
+macro_rules! winapi_enum{
+    ($t:ident, $doc:expr => [$($v:ident),*]) => (
+        #[doc=$doc]
+        #[allow(non_camel_case_types)]
+        #[derive(Debug,Clone,PartialEq)]
+        pub enum $t {
+            $( $v = winapi::um::winnt::$v as isize ),*
+        }
+    )
+}
+
+winapi_enum!(RegType, "Enumeration of possible registry value types" => [
+REG_NONE,
+REG_SZ,
+REG_EXPAND_SZ,
+REG_BINARY,
+REG_DWORD,
+REG_DWORD_BIG_ENDIAN,
+REG_LINK,
+REG_MULTI_SZ,
+REG_RESOURCE_LIST,
+REG_FULL_RESOURCE_DESCRIPTOR,
+REG_RESOURCE_REQUIREMENTS_LIST,
+REG_QWORD
+]);
+pub use self::RegType::*;
diff --git a/third_party/rust/winreg/src/lib.rs b/third_party/rust/winreg/src/lib.rs
new file mode 100644
index 0000000000..285259f822
--- /dev/null
+++ b/third_party/rust/winreg/src/lib.rs
@@ -0,0 +1,1170 @@
+// Copyright 2015, Igor Shaula
+// Licensed under the MIT License <LICENSE or
+// http://opensource.org/licenses/MIT>. This file
+// may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Crate for accessing MS Windows registry
+//!
+//!## Usage
+//!
+//!### Basic usage
+//!
+//!```toml,ignore
+//!# Cargo.toml
+//![dependencies]
+//!winreg = "0.5"
+//!```
+//!
+//!```no_run
+//!extern crate winreg;
+//!use std::path::Path;
+//!use std::io;
+//!use winreg::RegKey;
+//!use winreg::enums::*;
+//!
+//!fn main() {
+//!    println!("Reading some system info...");
+//!    let hklm = RegKey::predef(HKEY_LOCAL_MACHINE);
+//!    let cur_ver = hklm.open_subkey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion").unwrap();
+//!    let pf: String = cur_ver.get_value("ProgramFilesDir").unwrap();
+//!    let dp: String = cur_ver.get_value("DevicePath").unwrap();
+//!    println!("ProgramFiles = {}\nDevicePath = {}", pf, dp);
+//!    let info = cur_ver.query_info().unwrap();
+//!    println!("info = {:?}", info);
+//!
+//!    println!("And now lets write something...");
+//!    let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+//!    let path = Path::new("Software").join("WinregRsExample1");
+//!    let key = hkcu.create_subkey(&path).unwrap();
+//!
+//!    key.set_value("TestSZ", &"written by Rust").unwrap();
+//!    let sz_val: String = key.get_value("TestSZ").unwrap();
+//!    key.delete_value("TestSZ").unwrap();
+//!    println!("TestSZ = {}", sz_val);
+//!
+//!    key.set_value("TestDWORD", &1234567890u32).unwrap();
+//!    let dword_val: u32 = key.get_value("TestDWORD").unwrap();
+//!    println!("TestDWORD = {}", dword_val);
+//!
+//!    key.set_value("TestQWORD", &1234567891011121314u64).unwrap();
+//!    let qword_val: u64 = key.get_value("TestQWORD").unwrap();
+//!    println!("TestQWORD = {}", qword_val);
+//!
+//!    key.create_subkey("sub\\key").unwrap();
+//!    hkcu.delete_subkey_all(&path).unwrap();
+//!
+//!    println!("Trying to open nonexistent key...");
+//!    let key2 = hkcu.open_subkey(&path)
+//!    .unwrap_or_else(|e| match e.kind() {
+//!        io::ErrorKind::NotFound => panic!("Key doesn't exist"),
+//!        io::ErrorKind::PermissionDenied => panic!("Access denied"),
+//!        _ => panic!("{:?}", e)
+//!    });
+//!}
+//!```
+//!
+//!### Iterators
+//!
+//!```no_run
+//!extern crate winreg;
+//!use winreg::RegKey;
+//!use winreg::enums::*;
+//!
+//!fn main() {
+//!    println!("File extensions, registered in system:");
+//!    for i in RegKey::predef(HKEY_CLASSES_ROOT)
+//!        .enum_keys().map(|x| x.unwrap())
+//!        .filter(|x| x.starts_with("."))
+//!    {
+//!        println!("{}", i);
+//!    }
+//!
+//!    let system = RegKey::predef(HKEY_LOCAL_MACHINE)
+//!        .open_subkey("HARDWARE\\DESCRIPTION\\System").unwrap();
+//!    for (name, value) in system.enum_values().map(|x| x.unwrap()) {
+//!        println!("{} = {:?}", name, value);
+//!    }
+//!}
+//!```
+//!
+#![cfg_attr(feature="clippy", feature(plugin))]
+#![cfg_attr(feature="clippy", plugin(clippy))]
+#![cfg_attr(feature="clippy", warn(option_unwrap_used))]
+#![cfg_attr(feature="clippy", warn(result_unwrap_used))]
+extern crate winapi;
+#[cfg(feature = "serialization-serde")]
+extern crate serde;
+use std::ptr;
+use std::slice;
+use std::fmt;
+use std::default::Default;
+use std::ffi::OsStr;
+use std::os::windows::ffi::OsStrExt;
+use std::mem::transmute;
+use std::io;
+use winapi::shared::winerror;
+pub use winapi::shared::minwindef::HKEY;
+use winapi::shared::minwindef::{DWORD, BYTE, LPBYTE};
+use winapi::um::winnt::{self, WCHAR};
+use winapi::um::winreg as winapi_reg;
+use enums::*;
+use types::{FromRegValue, ToRegValue};
+#[cfg(feature = "transactions")]
+use transaction::Transaction;
+
+macro_rules! werr {
+    ($e:expr) => (
+        Err(io::Error::from_raw_os_error($e as i32))
+    )
+}
+
+pub mod enums;
+pub mod types;
+#[cfg(feature = "transactions")]
+pub mod transaction;
+#[cfg(feature = "serialization-serde")]
+mod encoder;
+#[cfg(feature = "serialization-serde")]
+mod decoder;
+
+/// Metadata returned by `RegKey::query_info`
+#[derive(Debug,Default)]
+pub struct RegKeyMetadata {
+    // pub Class: winapi::LPWSTR,
+    // pub ClassLen: DWORD,
+    pub sub_keys: DWORD,
+    pub max_sub_key_len: DWORD,
+    pub max_class_len: DWORD,
+    pub values: DWORD,
+    pub max_value_name_len: DWORD,
+    pub max_value_len: DWORD,
+    // pub SecurityDescriptor: DWORD,
+    // pub LastWriteTime: winapi::PFILETIME,
+}
+
+/// Raw registry value
+#[derive(PartialEq)]
+pub struct RegValue {
+    pub bytes: Vec<u8>,
+    pub vtype: RegType,
+}
+
+macro_rules! format_reg_value {
+    ($e:expr => $t:ident) => (
+        match $t::from_reg_value($e) {
+            Ok(val) => format!("{:?}", val),
+            Err(_) => return Err(fmt::Error),
+        }
+    )
+}
+
+impl fmt::Debug for RegValue {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let f_val = match self.vtype {
+            REG_SZ | REG_EXPAND_SZ | REG_MULTI_SZ => {
+                format_reg_value!(self => String)
+            },
+            REG_DWORD => {
+                format_reg_value!(self => u32)
+            },
+            REG_QWORD => {
+                format_reg_value!(self => u64)
+            },
+            _ => format!("{:?}", self.bytes) //TODO: implement more types
+        };
+        write!(f, "RegValue({:?}: {})", self.vtype, f_val)
+    }
+}
+
+/// Handle of opened registry key
+#[derive(Debug)]
+pub struct RegKey {
+    hkey: HKEY,
+}
+
+unsafe impl Send for RegKey {}
+
+impl RegKey {
+    /// Open one of predefined keys:
+    ///
+    /// * `HKEY_CLASSES_ROOT`
+    /// * `HKEY_CURRENT_USER`
+    /// * `HKEY_LOCAL_MACHINE`
+    /// * `HKEY_USERS`
+    /// * `HKEY_PERFORMANCE_DATA`
+    /// * `HKEY_PERFORMANCE_TEXT`
+    /// * `HKEY_PERFORMANCE_NLSTEXT`
+    /// * `HKEY_CURRENT_CONFIG`
+    /// * `HKEY_DYN_DATA`
+    /// * `HKEY_CURRENT_USER_LOCAL_SETTINGS`
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use winreg::RegKey;
+    /// # use winreg::enums::*;
+    /// let hklm = RegKey::predef(HKEY_LOCAL_MACHINE);
+    /// ```
+    pub fn predef(hkey: HKEY) -> RegKey {
+        RegKey{ hkey: hkey }
+    }
+
+    /// Return inner winapi HKEY of a key:
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use winreg::RegKey;
+    /// # use winreg::enums::*;
+    /// let hklm = RegKey::predef(HKEY_LOCAL_MACHINE);
+    /// let soft = hklm.open_subkey("SOFTWARE").unwrap();
+    /// let handle = soft.raw_handle();
+    /// ```
+    pub fn raw_handle(&self) -> HKEY {
+        self.hkey
+    }
+
+    /// Open subkey with `KEY_READ` permissions.
+    /// Will open another handle to itself if `path` is an empty string.
+    /// To open with different permissions use `open_subkey_with_flags`.
+    /// You can also use `create_subkey` to open with `KEY_ALL_ACCESS` permissions.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use winreg::RegKey;
+    /// # use winreg::enums::*;
+    /// let soft = RegKey::predef(HKEY_CURRENT_USER)
+    ///     .open_subkey("Software").unwrap();
+    /// ```
+    pub fn open_subkey<P: AsRef<OsStr>>(&self, path: P) -> io::Result<RegKey> {
+        self.open_subkey_with_flags(path, enums::KEY_READ)
+    }
+
+    /// Open subkey with desired permissions.
+    /// Will open another handle to itself if `path` is an empty string.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use winreg::RegKey;
+    /// # use winreg::enums::*;
+    /// let hklm = RegKey::predef(HKEY_LOCAL_MACHINE);
+    /// hklm.open_subkey_with_flags("SOFTWARE\\Microsoft", KEY_READ).unwrap();
+    /// ```
+    pub fn open_subkey_with_flags<P: AsRef<OsStr>>(&self, path: P, perms: winapi_reg::REGSAM) -> io::Result<RegKey> {
+        let c_path = to_utf16(path);
+        let mut new_hkey: HKEY = ptr::null_mut();
+        match unsafe {
+            winapi_reg::RegOpenKeyExW(
+                self.hkey,
+                c_path.as_ptr(),
+                0,
+                perms,
+                &mut new_hkey,
+            ) as DWORD
+        } {
+            0 => Ok(RegKey{ hkey: new_hkey }),
+            err => werr!(err)
+        }
+    }
+
+    /// Part of `transactions` feature.
+    #[cfg(feature = "transactions")]
+    pub fn open_subkey_transacted<P: AsRef<OsStr>>(&self, path: P, t: &Transaction) -> io::Result<RegKey> {
+        self.open_subkey_transacted_with_flags(path, t, winnt::KEY_READ)
+    }
+
+    /// Part of `transactions` feature.
+    #[cfg(feature = "transactions")]
+    pub fn open_subkey_transacted_with_flags<P: AsRef<OsStr>>(&self, path: P, t: &Transaction, perms: winapi_reg::REGSAM)
+        -> io::Result<RegKey>
+    {
+        let c_path = to_utf16(path);
+        let mut new_hkey: HKEY = ptr::null_mut();
+        match unsafe {
+            winapi_reg::RegOpenKeyTransactedW(
+                self.hkey,
+                c_path.as_ptr(),
+                0,
+                perms,
+                &mut new_hkey,
+                t.handle,
+                ptr::null_mut(),
+            ) as DWORD
+        } {
+            0 => Ok(RegKey{ hkey: new_hkey }),
+            err => werr!(err)
+        }
+    }
+
+    /// Create subkey (and all missing parent keys)
+    /// and open it with `KEY_ALL_ACCESS` permissions.
+    /// Will just open key if it already exists.
+    /// Will open another handle to itself if `path` is an empty string.
+    /// To create with different permissions use `create_subkey_with_flags`.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use winreg::RegKey;
+    /// # use winreg::enums::*;
+    /// let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+    /// let settings = hkcu.create_subkey("Software\\MyProduct\\Settings").unwrap();
+    /// ```
+    pub fn create_subkey<P: AsRef<OsStr>>(&self, path: P) -> io::Result<RegKey> {
+        self.create_subkey_with_flags(path, enums::KEY_ALL_ACCESS)
+    }
+
+    pub fn create_subkey_with_flags<P: AsRef<OsStr>>(&self, path: P, perms: winapi_reg::REGSAM) -> io::Result<RegKey> {
+        let c_path = to_utf16(path);
+        let mut new_hkey: HKEY = ptr::null_mut();
+        let mut disp: DWORD = 0;
+        match unsafe {
+            winapi_reg::RegCreateKeyExW(
+                self.hkey,
+                c_path.as_ptr(),
+                0,
+                ptr::null_mut(),
+                winnt::REG_OPTION_NON_VOLATILE,
+                perms,
+                ptr::null_mut(),
+                &mut new_hkey,
+                &mut disp // TODO: return this somehow
+            )
+        } {
+            0 => Ok(RegKey{ hkey: new_hkey }),
+            err => werr!(err)
+        }
+    }
+
+    /// Part of `transactions` feature.
+    #[cfg(feature = "transactions")]
+    pub fn create_subkey_transacted<P: AsRef<OsStr>>(&self, path: P, t: &Transaction) -> io::Result<RegKey> {
+        self.create_subkey_transacted_with_flags(path, t, winnt::KEY_ALL_ACCESS)
+    }
+
+    /// Part of `transactions` feature.
+    #[cfg(feature = "transactions")]
+    pub fn create_subkey_transacted_with_flags<P: AsRef<OsStr>>(&self, path: P, t: &Transaction, perms: winapi_reg::REGSAM)
+        -> io::Result<RegKey>
+    {
+        let c_path = to_utf16(path);
+        let mut new_hkey: HKEY = ptr::null_mut();
+        let mut disp: DWORD = 0;
+        match unsafe {
+            winapi_reg::RegCreateKeyTransactedW(
+                self.hkey,
+                c_path.as_ptr(),
+                0,
+                ptr::null_mut(),
+                winnt::REG_OPTION_NON_VOLATILE,
+                perms,
+                ptr::null_mut(),
+                &mut new_hkey,
+                &mut disp, // TODO: return this somehow
+                t.handle,
+                ptr::null_mut(),
+            ) as DWORD
+        } {
+            0 => Ok(RegKey{ hkey: new_hkey }),
+            err => werr!(err)
+        }
+    }
+
+    /// Copy all the values and subkeys from `path` to `dest` key.
+    /// WIll copy the content of `self` if `path` is an empty string.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use winreg::RegKey;
+    /// # use winreg::enums::*;
+    /// let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+    /// let src = hkcu.open_subkey_with_flags("Software\\MyProduct", KEY_READ).unwrap();
+    /// let dst = hkcu.create_subkey("Software\\MyProduct\\Section2").unwrap();
+    /// src.copy_tree("Section1", &dst).unwrap();
+    /// ```
+    pub fn copy_tree<P: AsRef<OsStr>>(&self, path: P, dest: &RegKey) -> io::Result<()> {
+        let c_path = to_utf16(path);
+        match unsafe {
+            winapi_reg::RegCopyTreeW(
+                self.hkey,
+                c_path.as_ptr(),
+                dest.hkey,
+            )
+        } {
+            0 => Ok(()),
+            err => werr!(err)
+        }
+    }
+
+    pub fn query_info(&self) -> io::Result<RegKeyMetadata> {
+        let mut info: RegKeyMetadata = Default::default();
+        match unsafe {
+            winapi_reg::RegQueryInfoKeyW(
+                self.hkey,
+                ptr::null_mut(), // Class: winapi::LPWSTR,
+                ptr::null_mut(), // ClassLen: DWORD,
+                ptr::null_mut(), // Reserved
+                &mut info.sub_keys,
+                &mut info.max_sub_key_len,
+                &mut info.max_class_len,
+                &mut info.values,
+                &mut info.max_value_name_len,
+                &mut info.max_value_len,
+                ptr::null_mut(), // lpcbSecurityDescriptor: winapi::LPDWORD,
+                ptr::null_mut(), // lpftLastWriteTime: winapi::PFILETIME,
+            ) as DWORD
+        } {
+            0 => Ok(info),
+            err => werr!(err)
+        }
+    }
+
+    /// Return an iterator over subkeys names.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use winreg::RegKey;
+    /// # use winreg::enums::*;
+    /// println!("File extensions, registered in this system:");
+    /// for i in RegKey::predef(HKEY_CLASSES_ROOT)
+    ///     .enum_keys().map(|x| x.unwrap())
+    ///     .filter(|x| x.starts_with("."))
+    /// {
+    ///     println!("{}", i);
+    /// }
+    /// ```
+    pub fn enum_keys(&self) -> EnumKeys {
+        EnumKeys{key: self, index: 0}
+    }
+
+    /// Return an iterator over values.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use winreg::RegKey;
+    /// # use winreg::enums::*;
+    /// let system = RegKey::predef(HKEY_LOCAL_MACHINE)
+    ///     .open_subkey_with_flags("HARDWARE\\DESCRIPTION\\System", KEY_READ)
+    ///     .unwrap();
+    /// for (name, value) in system.enum_values().map(|x| x.unwrap()) {
+    ///     println!("{} = {:?}", name, value);
+    /// }
+    /// ```
+    pub fn enum_values(&self) -> EnumValues {
+        EnumValues{key: self, index: 0}
+    }
+
+    /// Delete key.Key names are not case sensitive.
+    /// Cannot delete if it has subkeys.
+    /// Use `delete_subkey_all` for that.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use winreg::RegKey;
+    /// # use winreg::enums::*;
+    /// RegKey::predef(HKEY_CURRENT_USER)
+    ///     .delete_subkey(r"Software\MyProduct\History").unwrap();
+    /// ```
+    pub fn delete_subkey<P: AsRef<OsStr>>(&self, path: P) -> io::Result<()> {
+        let c_path = to_utf16(path);
+        match unsafe {
+            winapi_reg::RegDeleteKeyW(
+                self.hkey,
+                c_path.as_ptr(), //This parameter cannot be NULL.
+            ) as DWORD
+        } {
+            0 => Ok(()),
+            err => werr!(err)
+        }
+    }
+
+    /// Part of `transactions` feature.
+    #[cfg(feature = "transactions")]
+    pub fn delete_subkey_transacted<P: AsRef<OsStr>>(&self, path: P, t: &Transaction) -> io::Result<()> {
+        let c_path = to_utf16(path);
+        match unsafe {
+            winapi_reg::RegDeleteKeyTransactedW(
+                self.hkey,
+                c_path.as_ptr(), //The value of this parameter cannot be NULL.
+                0,
+                0,
+                t.handle,
+                ptr::null_mut(),
+            ) as DWORD
+        } {
+            0 => Ok(()),
+            err => werr!(err)
+        }
+    }
+
+    /// Recursively delete subkey with all its subkeys and values.
+    /// If `path` is an empty string, the subkeys and values of this key are deleted.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use winreg::RegKey;
+    /// # use winreg::enums::*;
+    /// RegKey::predef(HKEY_CURRENT_USER)
+    ///     .delete_subkey_all("Software\\MyProduct").unwrap();
+    /// ```
+    pub fn delete_subkey_all<P: AsRef<OsStr>>(&self, path: P) -> io::Result<()> {
+        let c_path;
+        let path_ptr;
+        if path.as_ref().is_empty(){
+            path_ptr = ptr::null();
+        }else{
+            c_path = to_utf16(path);
+            path_ptr = c_path.as_ptr();
+        }
+        match unsafe{
+            winapi_reg::RegDeleteTreeW(
+                self.hkey,
+                path_ptr,//If this parameter is NULL, the subkeys and values of this key are deleted.
+            ) as DWORD
+        } {
+            0 => Ok(()),
+            err => werr!(err)
+        }
+    }
+
+    /// Get a value from registry and seamlessly convert it to the specified rust type
+    /// with `FromRegValue` implemented (currently `String`, `u32` and `u64`).
+    /// Will get the `Default` value if `name` is an empty string.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use winreg::RegKey;
+    /// # use winreg::enums::*;
+    /// # let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+    /// let settings = hkcu.open_subkey("Software\\MyProduct\\Settings").unwrap();
+    /// let server: String = settings.get_value("server").unwrap();
+    /// let port: u32 = settings.get_value("port").unwrap();
+    /// ```
+    pub fn get_value<T: FromRegValue, N: AsRef<OsStr>>(&self, name: N) -> io::Result<T> {
+        match self.get_raw_value(name) {
+            Ok(ref val) => FromRegValue::from_reg_value(val),
+            Err(err) => Err(err)
+        }
+    }
+
+    /// Get raw bytes from registry value.
+    /// Will get the `Default` value if `name` is an empty string.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use winreg::RegKey;
+    /// # use winreg::enums::*;
+    /// # let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+    /// let settings = hkcu.open_subkey("Software\\MyProduct\\Settings").unwrap();
+    /// let data = settings.get_raw_value("data").unwrap();
+    /// println!("Bytes: {:?}", data.bytes);
+    /// ```
+    pub fn get_raw_value<N: AsRef<OsStr>>(&self, name: N) -> io::Result<RegValue> {
+        let c_name = to_utf16(name);
+        let mut buf_len: DWORD = 2048;
+        let mut buf_type: DWORD = 0;
+        let mut buf: Vec<u8> = Vec::with_capacity(buf_len as usize);
+        loop {
+            match unsafe {
+                winapi_reg::RegQueryValueExW(
+                    self.hkey,
+                    c_name.as_ptr() as *const u16,
+                    ptr::null_mut(),
+                    &mut buf_type,
+                    buf.as_mut_ptr() as LPBYTE,
+                    &mut buf_len
+                ) as DWORD
+            } {
+                0 => {
+                    unsafe{ buf.set_len(buf_len as usize); }
+                    // minimal check before transmute to RegType
+                    if buf_type > winnt::REG_QWORD {
+                        return werr!(winerror::ERROR_BAD_FILE_TYPE);
+                    }
+                    let t: RegType = unsafe{ transmute(buf_type as u8) };
+                    return Ok(RegValue{ bytes: buf, vtype: t })
+                },
+                winerror::ERROR_MORE_DATA => {
+                    buf.reserve(buf_len as usize);
+                },
+                err => return werr!(err),
+            }
+        }
+    }
+
+    /// Seamlessly convert a value from a rust type and write it to the registry value
+    /// with `ToRegValue` trait implemented (currently `String`, `&str`, `u32` and `u64`).
+    /// Will set the `Default` value if `name` is an empty string.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use winreg::RegKey;
+    /// # use winreg::enums::*;
+    /// # let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+    /// let settings = hkcu.create_subkey("Software\\MyProduct\\Settings").unwrap();
+    /// settings.set_value("server", &"www.example.com").unwrap();
+    /// settings.set_value("port", &8080u32).unwrap();
+    /// ```
+    pub fn set_value<T: ToRegValue, N: AsRef<OsStr>>(&self, name: N, value: &T) -> io::Result<()> {
+        self.set_raw_value(name, &value.to_reg_value())
+    }
+
+    /// Write raw bytes from `RegValue` struct to a registry value.
+    /// Will set the `Default` value if `name` is an empty string.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// use winreg::{RegKey, RegValue};
+    /// use winreg::enums::*;
+    /// let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+    /// let settings = hkcu.open_subkey("Software\\MyProduct\\Settings").unwrap();
+    /// let bytes: Vec<u8> = vec![1, 2, 3, 5, 8, 13, 21, 34, 55, 89];
+    /// let data = RegValue{ vtype: REG_BINARY, bytes: bytes};
+    /// settings.set_raw_value("data", &data).unwrap();
+    /// println!("Bytes: {:?}", data.bytes)
+    /// ```
+    pub fn set_raw_value<N: AsRef<OsStr>>(&self, name: N, value: &RegValue) -> io::Result<()> {
+        let c_name = to_utf16(name);
+        let t = value.vtype.clone() as DWORD;
+        match unsafe{
+            winapi_reg::RegSetValueExW(
+                self.hkey,
+                c_name.as_ptr(),
+                0,
+                t,
+                value.bytes.as_ptr() as *const BYTE,
+                value.bytes.len() as u32
+            ) as DWORD
+        } {
+            0 => Ok(()),
+            err => werr!(err)
+        }
+    }
+
+    /// Delete specified value from registry.
+    /// Will delete the `Default` value if `name` is an empty string.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// # use winreg::RegKey;
+    /// # use winreg::enums::*;
+    /// # let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+    /// let settings = hkcu.open_subkey("Software\\MyProduct\\Settings").unwrap();
+    /// settings.delete_value("data").unwrap();
+    /// ```
+    pub fn delete_value<N: AsRef<OsStr>>(&self, name: N) -> io::Result<()> {
+        let c_name = to_utf16(name);
+        match unsafe {
+            winapi_reg::RegDeleteValueW(
+                self.hkey,
+                c_name.as_ptr(),
+            ) as DWORD
+        } {
+            0 => Ok(()),
+            err => werr!(err)
+        }
+    }
+
+    /// Save `Encodable` type to a registry key.
+    /// Part of `serialization-serde` feature.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// #[macro_use]
+    /// extern crate serde_derive;
+    /// extern crate winreg;
+    /// # fn main() {
+    /// use winreg::RegKey;
+    /// use winreg::enums::*;
+    ///
+    /// #[derive(Serialize)]
+    /// struct Rectangle{
+    ///     x: u32,
+    ///     y: u32,
+    ///     w: u32,
+    ///     h: u32,
+    /// }
+    ///
+    /// #[derive(Serialize)]
+    /// struct Settings{
+    ///     current_dir: String,
+    ///     window_pos: Rectangle,
+    ///     show_in_tray: bool,
+    /// }
+    ///
+    /// let s: Settings = Settings{
+    ///     current_dir: "C:\\".to_owned(),
+    ///     window_pos: Rectangle{ x:200, y: 100, w: 800, h: 500 },
+    ///     show_in_tray: false,
+    /// };
+    /// let s_key = RegKey::predef(HKEY_CURRENT_USER)
+    ///     .open_subkey("Software\\MyProduct\\Settings").unwrap();
+    /// s_key.encode(&s).unwrap();
+    /// # }
+    /// ```
+    #[cfg(feature = "serialization-serde")]
+    pub fn encode<T: serde::Serialize>(&self, value: &T)
+        -> encoder::EncodeResult<()>
+    {
+        let mut encoder = try!(
+            encoder::Encoder::from_key(self)
+        );
+        try!(value.serialize(&mut encoder));
+        encoder.commit()
+    }
+
+    /// Load `Decodable` type from a registry key.
+    /// Part of `serialization-serde` feature.
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// #[macro_use]
+    /// extern crate serde_derive;
+    /// extern crate winreg;
+    /// # fn main() {
+    /// use winreg::RegKey;
+    /// use winreg::enums::*;
+    ///
+    /// #[derive(Deserialize)]
+    /// struct Rectangle{
+    ///     x: u32,
+    ///     y: u32,
+    ///     w: u32,
+    ///     h: u32,
+    /// }
+    ///
+    /// #[derive(Deserialize)]
+    /// struct Settings{
+    ///     current_dir: String,
+    ///     window_pos: Rectangle,
+    ///     show_in_tray: bool,
+    /// }
+    ///
+    /// let s_key = RegKey::predef(HKEY_CURRENT_USER)
+    ///     .open_subkey("Software\\MyProduct\\Settings").unwrap();
+    /// let s: Settings = s_key.decode().unwrap();
+    /// # }
+    /// ```
+    #[cfg(feature = "serialization-serde")]
+    pub fn decode<'de, T: serde::Deserialize<'de>>(&self)
+        -> decoder::DecodeResult<T>
+    {
+        let mut decoder = try!(
+            decoder::Decoder::from_key(self)
+        );
+        T::deserialize(&mut decoder)
+    }
+
+    fn close_(&mut self) -> io::Result<()> {
+        // don't try to close predefined keys
+        if self.hkey >= enums::HKEY_CLASSES_ROOT { return Ok(()) };
+        match unsafe {
+            winapi_reg::RegCloseKey(self.hkey) as DWORD
+        } {
+            0 => Ok(()),
+            err => werr!(err)
+        }
+    }
+
+    fn enum_key(&self, index: DWORD) -> Option<io::Result<String>> {
+        let mut name_len = 2048;
+        let mut name = [0 as WCHAR; 2048];
+        match unsafe {
+            winapi_reg::RegEnumKeyExW(
+                self.hkey,
+                index,
+                name.as_mut_ptr(),
+                &mut name_len,
+                ptr::null_mut(), // reserved
+                ptr::null_mut(), // lpClass: LPWSTR,
+                ptr::null_mut(), // lpcClass: LPDWORD,
+                ptr::null_mut(), // lpftLastWriteTime: PFILETIME,
+            ) as DWORD
+        } {
+            0 => {
+                match String::from_utf16(&name[..name_len as usize]) {
+                    Ok(s) => Some(Ok(s)),
+                    Err(_) => Some(werr!(winerror::ERROR_INVALID_BLOCK))
+                }
+            },
+            winerror::ERROR_NO_MORE_ITEMS => None,
+            err => {
+                Some(werr!(err))
+            }
+        }
+    }
+
+    fn enum_value(&self, index: DWORD) -> Option<io::Result<(String, RegValue)>> {
+        let mut name_len = 2048;
+        let mut name = [0 as WCHAR; 2048];
+
+        let mut buf_len: DWORD = 2048;
+        let mut buf_type: DWORD = 0;
+        let mut buf: Vec<u8> = Vec::with_capacity(buf_len as usize);
+        loop {
+            match unsafe {
+                winapi_reg::RegEnumValueW(
+                    self.hkey,
+                    index,
+                    name.as_mut_ptr(),
+                    &mut name_len,
+                    ptr::null_mut(), // reserved
+                    &mut buf_type,
+                    buf.as_mut_ptr() as LPBYTE,
+                    &mut buf_len,
+                ) as DWORD
+            } {
+                0 => {
+                    let name = match String::from_utf16(&name[..name_len as usize]) {
+                        Ok(s) => s,
+                        Err(_) => return Some(werr!(winerror::ERROR_INVALID_DATA))
+                    };
+                    unsafe{ buf.set_len(buf_len as usize); }
+                    // minimal check before transmute to RegType
+                    if buf_type > winnt::REG_QWORD {
+                        return Some(werr!(winerror::ERROR_BAD_FILE_TYPE));
+                    }
+                    let t: RegType = unsafe{ transmute(buf_type as u8) };
+                    let value = RegValue{ bytes: buf, vtype: t };
+                    return Some(Ok((name, value)))
+                },
+                winerror::ERROR_MORE_DATA => {
+                    name_len += 1; //for NULL char
+                    buf.reserve(buf_len as usize);
+                },
+                winerror::ERROR_NO_MORE_ITEMS => return None,
+                err => return Some(werr!(err))
+            }
+        }
+    }
+}
+
+impl Drop for RegKey {
+    fn drop(&mut self) {
+        self.close_().unwrap_or(());
+    }
+}
+
+/// Iterator over subkeys names
+pub struct EnumKeys<'key> {
+    key: &'key RegKey,
+    index: DWORD,
+}
+
+impl<'key> Iterator for EnumKeys<'key> {
+    type Item = io::Result<String>;
+
+    fn next(&mut self) -> Option<io::Result<String>> {
+        match self.key.enum_key(self.index) {
+            v @ Some(_) => {
+                self.index += 1;
+                v
+            },
+            e @ None => e
+        }
+    }
+}
+
+/// Iterator over values
+pub struct EnumValues<'key> {
+    key: &'key RegKey,
+    index: DWORD,
+}
+
+impl<'key> Iterator for EnumValues<'key> {
+    type Item = io::Result<(String, RegValue)>;
+
+    fn next(&mut self) -> Option<io::Result<(String, RegValue)>> {
+        match self.key.enum_value(self.index) {
+            v @ Some(_) => {
+                self.index += 1;
+                v
+            },
+            e @ None => e
+        }
+    }
+}
+
+fn to_utf16<P: AsRef<OsStr>>(s: P) -> Vec<u16> {
+    s.as_ref().encode_wide().chain(Some(0).into_iter()).collect()
+}
+
+fn v16_to_v8(v: &[u16]) -> Vec<u8> {
+    unsafe {
+        slice::from_raw_parts(v.as_ptr() as *const u8, v.len()*2).to_vec()
+    }
+}
+
+#[cfg(all(test, feature = "serialization-serde"))]
+#[macro_use]
+extern crate serde_derive;
+
+#[cfg(test)]
+#[cfg_attr(feature="clippy", allow(option_unwrap_used))]
+#[cfg_attr(feature="clippy", allow(result_unwrap_used))]
+mod test {
+    extern crate rand;
+    use super::*;
+    use std::collections::HashMap;
+    use self::rand::Rng;
+    use std::ffi::{OsStr,OsString};
+
+    #[test]
+    fn test_raw_handle() {
+        let hklm = RegKey::predef(HKEY_LOCAL_MACHINE);
+        let handle = hklm.raw_handle();
+        assert_eq!(HKEY_LOCAL_MACHINE, handle);
+    }
+
+    #[test]
+    fn test_open_subkey_with_flags_query_info() {
+        let hklm = RegKey::predef(HKEY_LOCAL_MACHINE);
+        let win = hklm.open_subkey_with_flags("Software\\Microsoft\\Windows", KEY_READ).unwrap();
+        assert!(win.query_info().is_ok());
+        assert!(win.open_subkey_with_flags("CurrentVersion\\", KEY_READ).is_ok());
+        assert!(hklm.open_subkey_with_flags("i\\just\\hope\\nobody\\created\\that\\key", KEY_READ).is_err());
+    }
+
+    macro_rules! with_key {
+        ($k:ident, $path:expr => $b:block) => {{
+            let mut path = "Software\\WinRegRsTest".to_owned();
+            path.push_str($path);
+            let $k = RegKey::predef(HKEY_CURRENT_USER)
+                .create_subkey(&path).unwrap();
+            $b
+            RegKey::predef(HKEY_CURRENT_USER)
+            .delete_subkey_all(path).unwrap();
+        }}
+    }
+
+    #[test]
+    fn test_delete_subkey() {
+        let path = "Software\\WinRegRsTestDeleteSubkey";
+        RegKey::predef(HKEY_CURRENT_USER).create_subkey(path).unwrap();
+        assert!(RegKey::predef(HKEY_CURRENT_USER)
+            .delete_subkey(path).is_ok());
+    }
+
+    #[test]
+    fn test_copy_tree() {
+        with_key!(key, "CopyTree" => {
+            let sub_tree = key.create_subkey("Src\\Sub\\Tree").unwrap();
+            for v in &["one", "two", "three"] {
+                sub_tree.set_value(v, v).unwrap();
+            }
+            let dst = key.create_subkey("Dst").unwrap();
+            assert!(key.copy_tree("Src", &dst).is_ok());
+        });
+    }
+
+    #[test]
+    fn test_long_value() {
+        with_key!(key, "LongValue" => {
+            let name = "RustLongVal";
+            let val1 = RegValue { vtype: REG_BINARY, bytes: (0..6000).map(|_| rand::random::<u8>()).collect() };
+            key.set_raw_value(name, &val1).unwrap();
+            let val2 = key.get_raw_value(name).unwrap();
+            assert_eq!(val1, val2);
+        });
+    }
+
+    #[test]
+    fn test_string_value() {
+        with_key!(key, "StringValue" => {
+            let name = "RustStringVal";
+            let val1 = "Test123 \n$%^&|+-*/\\()".to_owned();
+            key.set_value(name, &val1).unwrap();
+            let val2: String = key.get_value(name).unwrap();
+            assert_eq!(val1, val2);
+        });
+    }
+
+    #[test]
+    fn test_long_string_value() {
+        with_key!(key, "LongStringValue" => {
+            let name = "RustLongStringVal";
+            let val1 : String = rand::thread_rng().gen_ascii_chars().take(7000).collect();
+            key.set_value(name, &val1).unwrap();
+            let val2: String = key.get_value(name).unwrap();
+            assert_eq!(val1, val2);
+        });
+    }
+
+    #[test]
+    fn test_os_string_value() {
+        with_key!(key, "OsStringValue" => {
+            let name = "RustOsStringVal";
+            let val1 = OsStr::new("Test123 \n$%^&|+-*/\\()\u{0}");
+            key.set_value(name, &val1).unwrap();
+            let val2: OsString = key.get_value(name).unwrap();
+            assert_eq!(val1, val2);
+        });
+    }
+
+    #[test]
+    fn test_long_os_string_value() {
+        with_key!(key, "LongOsStringValue" => {
+        let name = "RustLongOsStringVal";
+        let mut val1 = rand::thread_rng().gen_ascii_chars().take(7000).collect::<String>();
+        val1.push('\u{0}');
+        let val1 = OsStr::new(&val1);
+        key.set_value(name, &val1).unwrap();
+        let val2: OsString = key.get_value(name).unwrap();
+        assert_eq!(val1, val2);
+        });
+    }
+
+    #[test]
+    fn test_u32_value() {
+        with_key!(key, "U32Value" => {
+            let name = "RustU32Val";
+            let val1 = 1234567890u32;
+            key.set_value(name, &val1).unwrap();
+            let val2: u32 = key.get_value(name).unwrap();
+            assert_eq!(val1, val2);
+        });
+    }
+
+    #[test]
+    fn test_u64_value() {
+        with_key!(key, "U64Value" => {
+            let name = "RustU64Val";
+            let val1 = 1234567891011121314u64;
+            key.set_value(name, &val1).unwrap();
+            let val2: u64 = key.get_value(name).unwrap();
+            assert_eq!(val1, val2);
+        });
+    }
+
+    #[test]
+    fn test_delete_value() {
+        with_key!(key, "DeleteValue" => {
+            let name = "WinregRsTestVal";
+            key.set_value(name, &"Qwerty123").unwrap();
+            assert!(key.delete_value(name).is_ok());
+        });
+    }
+
+    #[test]
+    fn test_enum_keys() {
+        with_key!(key, "EnumKeys" => {
+            let mut keys1 = vec!("qwerty", "asdf", "1", "2", "3", "5", "8", "йцукен");
+            keys1.sort();
+            for i in &keys1 {
+                key.create_subkey(i).unwrap();
+            }
+            let keys2: Vec<_> = key.enum_keys().map(|x| x.unwrap()).collect();
+            assert_eq!(keys1, keys2);
+        });
+    }
+
+    #[test]
+    fn test_enum_values() {
+        with_key!(key, "EnumValues" => {
+            let mut vals1 = vec!("qwerty", "asdf", "1", "2", "3", "5", "8", "йцукен");
+            vals1.sort();
+            for i in &vals1 {
+                key.set_value(i,i).unwrap();
+            }
+            let mut vals2: Vec<String> = Vec::with_capacity(vals1.len());
+            let mut vals3: Vec<String> = Vec::with_capacity(vals1.len());
+            for (name, val) in key.enum_values()
+                .map(|x| x.unwrap())
+            {
+                vals2.push(name);
+                vals3.push(String::from_reg_value(&val).unwrap());
+            }
+            assert_eq!(vals1, vals2);
+            assert_eq!(vals1, vals3);
+        });
+    }
+
+    #[test]
+    fn test_enum_long_values() {
+        with_key!(key, "EnumLongValues" => {
+            let mut vals = HashMap::with_capacity(3);
+
+            for i in &[5500, 9500, 15000] {
+                let name: String = format!("val{}", i);
+                let val = RegValue { vtype: REG_BINARY, bytes: (0..*i).map(|_| rand::random::<u8>()).collect() };
+                vals.insert(name, val);
+            }
+
+            for (name, val) in key.enum_values()
+                                  .map(|x| x.unwrap())
+            {
+                assert_eq!(val.bytes, vals[&name].bytes);
+            }
+        });
+    }
+
+    #[cfg(feature = "serialization-serde")]
+    #[test]
+    fn test_serialization() {
+        #[derive(Debug, PartialEq, Serialize, Deserialize)]
+        struct Rectangle{
+            x: u32,
+            y: u32,
+            w: u32,
+            h: u32,
+        }
+
+        #[derive(Debug, PartialEq, Serialize, Deserialize)]
+        struct Test {
+            t_bool: bool,
+            t_u8: u8,
+            t_u16: u16,
+            t_u32: u32,
+            t_u64: u64,
+            t_usize: usize,
+            t_struct: Rectangle,
+            t_string: String,
+            t_i8: i8,
+            t_i16: i16,
+            t_i32: i32,
+            t_i64: i64,
+            t_isize: isize,
+            t_f64: f64,
+            t_f32: f32,
+        }
+
+        let v1 = Test{
+            t_bool: false,
+            t_u8: 127,
+            t_u16: 32768,
+            t_u32: 123456789,
+            t_u64: 123456789101112,
+            t_usize: 1234567891,
+            t_struct: Rectangle{ x: 55, y: 77, w: 500, h: 300 },
+            t_string: "Test123 \n$%^&|+-*/\\()".to_owned(),
+            t_i8: -123,
+            t_i16: -2049,
+            t_i32: 20100,
+            t_i64: -12345678910,
+            t_isize: -1234567890,
+            t_f64: -0.01,
+            t_f32: 3.14,
+        };
+
+        with_key!(key, "Serialization" => {
+            key.encode(&v1).unwrap();
+            let v2: Test = key.decode().unwrap();
+            assert_eq!(v1, v2);
+        });
+    }
+}
diff --git a/third_party/rust/winreg/src/transaction.rs b/third_party/rust/winreg/src/transaction.rs
new file mode 100644
index 0000000000..5686e96b32
--- /dev/null
+++ b/third_party/rust/winreg/src/transaction.rs
@@ -0,0 +1,105 @@
+// Copyright 2015, Igor Shaula
+// Licensed under the MIT License <LICENSE or
+// http://opensource.org/licenses/MIT>. This file
+// may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Structure for a registry transaction.
+//! Part of `transactions` feature.
+//!
+//!```no_run
+//!extern crate winreg;
+//!use std::io;
+//!use winreg::RegKey;
+//!use winreg::enums::*;
+//!use winreg::transaction::Transaction;
+//!
+//!fn main() {
+//!    let t = Transaction::new().unwrap();
+//!    let hkcu = RegKey::predef(HKEY_CURRENT_USER);
+//!    let key = hkcu.create_subkey_transacted("Software\\RustTransaction", &t).unwrap();
+//!    key.set_value("TestQWORD", &1234567891011121314u64).unwrap();
+//!    key.set_value("TestDWORD", &1234567890u32).unwrap();
+//!
+//!    println!("Commit transaction? [y/N]:");
+//!    let mut input = String::new();
+//!    io::stdin().read_line(&mut input).unwrap();
+//!    input = input.trim_right().to_owned();
+//!    if input == "y" || input == "Y" {
+//!        t.commit().unwrap();
+//!        println!("Transaction committed.");
+//!    }
+//!    else {
+//!        // this is optional, if transaction wasn't committed,
+//!        // it will be rolled back on disposal
+//!        t.rollback().unwrap();
+//!
+//!        println!("Transaction wasn't committed, it will be rolled back.");
+//!    }
+//!}
+//!```
+#![cfg(feature = "transactions")]
+use std::ptr;
+use std::io;
+use winapi::um::winnt;
+use winapi::um::handleapi;
+use winapi::um::ktmw32;
+
+#[derive(Debug)]
+pub struct Transaction {
+    pub handle: winnt::HANDLE,
+}
+
+impl Transaction {
+    //TODO: add arguments
+    pub fn new() -> io::Result<Transaction> {
+        unsafe {
+            let handle = ktmw32::CreateTransaction(
+                ptr::null_mut(),
+                ptr::null_mut(),
+                0,
+                0,
+                0,
+                0,
+                ptr::null_mut(),
+            );
+            if handle == handleapi::INVALID_HANDLE_VALUE {
+                return Err(io::Error::last_os_error())
+            };
+            Ok(Transaction{ handle: handle })
+        }
+    }
+
+    pub fn commit(&self) -> io::Result<()> {
+        unsafe {
+            match ktmw32::CommitTransaction(self.handle) {
+                0 => Err(io::Error::last_os_error()),
+                _ => Ok(())
+            }
+        }
+    }
+
+    pub fn rollback(&self) -> io::Result<()> {
+        unsafe {
+            match ktmw32::RollbackTransaction(self.handle) {
+                0 => Err(io::Error::last_os_error()),
+                _ => Ok(())
+            }
+        }
+    }
+
+    fn close_(&mut self) -> io::Result<()> {
+        unsafe {
+            match handleapi::CloseHandle(self.handle) {
+                0 => Err(io::Error::last_os_error()),
+                _ => Ok(())
+            }
+        }
+    }
+}
+
+impl Drop for Transaction {
+    fn drop(&mut self) {
+        self.close_().unwrap_or(());
+    }
+}
diff --git a/third_party/rust/winreg/src/types.rs b/third_party/rust/winreg/src/types.rs
new file mode 100644
index 0000000000..fd605fa855
--- /dev/null
+++ b/third_party/rust/winreg/src/types.rs
@@ -0,0 +1,141 @@
+// Copyright 2015, Igor Shaula
+// Licensed under the MIT License <LICENSE or
+// http://opensource.org/licenses/MIT>. This file
+// may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Traits for loading/saving Registry values
+use std::slice;
+use std::io;
+use std::ffi::{OsStr,OsString};
+use std::os::windows::ffi::{OsStrExt,OsStringExt};
+use super::winapi::shared::winerror;
+use super::{RegValue};
+use super::enums::*;
+use super::{to_utf16,v16_to_v8};
+
+/// A trait for types that can be loaded from registry values.
+///
+/// **NOTE:** Uses `from_utf16_lossy` when converting to `String`.
+///
+/// **NOTE:** When converting to `String`, trailing `NULL` characters are trimmed
+/// and line separating `NULL` characters in `REG_MULTI_SZ` are replaced by `\n`.
+/// When converting to `OsString`, all `NULL` characters are left as is.
+pub trait FromRegValue : Sized {
+    fn from_reg_value(val: &RegValue) -> io::Result<Self>;
+}
+
+impl FromRegValue for String {
+    fn from_reg_value(val: &RegValue) -> io::Result<String> {
+        match val.vtype {
+            REG_SZ | REG_EXPAND_SZ | REG_MULTI_SZ => {
+                let words = unsafe {
+                    slice::from_raw_parts(val.bytes.as_ptr() as *const u16, val.bytes.len() / 2)
+                };
+                let mut s = String::from_utf16_lossy(words);
+                while s.ends_with('\u{0}') {s.pop();}
+                if val.vtype == REG_MULTI_SZ {
+                    return Ok(s.replace("\u{0}", "\n"))
+                }
+                Ok(s)
+            },
+            _ => werr!(winerror::ERROR_BAD_FILE_TYPE)
+        }
+    }
+}
+
+impl FromRegValue for OsString {
+    fn from_reg_value(val: &RegValue) -> io::Result<OsString> {
+        match val.vtype {
+            REG_SZ | REG_EXPAND_SZ | REG_MULTI_SZ => {
+                let words = unsafe {
+                    slice::from_raw_parts(val.bytes.as_ptr() as *const u16, val.bytes.len() / 2)
+                };
+                let s = OsString::from_wide(words);
+                Ok(s)
+            },
+            _ => werr!(winerror::ERROR_BAD_FILE_TYPE)
+        }
+    }
+}
+
+impl FromRegValue for u32 {
+    fn from_reg_value(val: &RegValue) -> io::Result<u32> {
+        match val.vtype {
+            REG_DWORD => {
+                Ok(unsafe{ *(val.bytes.as_ptr() as *const u32) })
+            },
+            _ => werr!(winerror::ERROR_BAD_FILE_TYPE)
+        }
+    }
+}
+
+impl FromRegValue for u64 {
+    fn from_reg_value(val: &RegValue) -> io::Result<u64> {
+        match val.vtype {
+            REG_QWORD => {
+                Ok(unsafe{ *(val.bytes.as_ptr() as *const u64) })
+            },
+            _ => werr!(winerror::ERROR_BAD_FILE_TYPE)
+        }
+    }
+}
+
+/// A trait for types that can be written into registry values.
+///
+/// **NOTE:** Adds trailing `NULL` character to `str` and `String` values
+/// but **not** to `OsStr` values.
+pub trait ToRegValue {
+    fn to_reg_value(&self) -> RegValue;
+}
+
+impl ToRegValue for String {
+    fn to_reg_value(&self) -> RegValue {
+        RegValue{
+            bytes: v16_to_v8(&to_utf16(self)),
+            vtype: REG_SZ
+        }
+    }
+}
+
+impl<'a> ToRegValue for &'a str {
+    fn to_reg_value(&self) -> RegValue {
+        RegValue{
+            bytes: v16_to_v8(&to_utf16(self)),
+            vtype: REG_SZ
+        }
+    }
+}
+
+impl<'a> ToRegValue for &'a OsStr {
+    fn to_reg_value(&self) -> RegValue {
+        RegValue{
+            bytes: v16_to_v8(&(self.encode_wide().collect::<Vec<_>>())),
+            vtype: REG_SZ
+        }
+    }
+}
+
+impl ToRegValue for u32 {
+    fn to_reg_value(&self) -> RegValue {
+        let bytes: Vec<u8> = unsafe {
+            slice::from_raw_parts((self as *const u32) as *const u8, 4).to_vec()
+        };
+        RegValue{
+            bytes: bytes,
+            vtype: REG_DWORD
+        }
+    }
+}
+
+impl ToRegValue for u64 {
+    fn to_reg_value(&self) -> RegValue {
+        let bytes: Vec<u8> = unsafe {
+            slice::from_raw_parts((self as *const u64) as *const u8, 8).to_vec()
+        };
+        RegValue{
+            bytes: bytes,
+            vtype: REG_QWORD
+        }
+    }
+}