From 8b72d93227a8f0635c8ffdc3a3d390a192ab956a Mon Sep 17 00:00:00 2001
From: Andrew Gallant <jamslam@gmail.com>
Date: Fri, 24 Aug 2018 23:20:33 -0400
Subject: windows: replace winapi ffi with winapi-util

We do still need winapi for a std-library work-around.
---
 Cargo.toml     |  5 ++++-
 src/lib.rs     | 10 ++++++----
 src/windows.rs | 34 ----------------------------------
 3 files changed, 10 insertions(+), 39 deletions(-)
 delete mode 100644 src/windows.rs

diff --git a/Cargo.toml b/Cargo.toml
index d6a4a0e..ff39c42 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,7 +20,10 @@ same-file = "1.0.1"
 
 [target.'cfg(windows)'.dependencies.winapi]
 version = "0.3"
-features = ["std", "fileapi", "winbase", "winnt"]
+features = ["std", "winnt"]
+
+[target.'cfg(windows)'.dependencies.winapi-util]
+version = "0.1.1"
 
 [dev-dependencies]
 docopt = "1.0.1"
diff --git a/src/lib.rs b/src/lib.rs
index d60c2d7..0d04a5d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -112,6 +112,8 @@ extern crate rand;
 extern crate same_file;
 #[cfg(windows)]
 extern crate winapi;
+#[cfg(windows)]
+extern crate winapi_util;
 
 use std::cmp::{Ordering, min};
 use std::error;
@@ -132,8 +134,6 @@ pub use unix::DirEntryExt;
 mod tests;
 #[cfg(unix)]
 mod unix;
-#[cfg(windows)]
-mod windows;
 
 /// Like try, but for iterators that return [`Option<Result<_, _>>`].
 ///
@@ -1666,8 +1666,10 @@ fn device_num<P: AsRef<Path>>(path: P)-> std::io::Result<u64> {
 
  #[cfg(windows)]
 fn device_num<P: AsRef<Path>>(path: P) -> std::io::Result<u64> {
-    windows::windows_file_handle_info(path)
-        .map(|info| info.dwVolumeSerialNumber as u64)
+    use winapi_util::{Handle, file};
+
+    let h = Handle::from_path_any(path)?;
+    file::information(h).map(|info| info.volume_serial_number())
 }
 
 #[cfg(not(any(unix, windows)))]
diff --git a/src/windows.rs b/src/windows.rs
deleted file mode 100644
index 85b726e..0000000
--- a/src/windows.rs
+++ /dev/null
@@ -1,34 +0,0 @@
-use std::fs::OpenOptions;
-use std::io::Error;
-use std::mem;
-use std::os::windows::fs::OpenOptionsExt;
-use std::os::windows::io::AsRawHandle;
-use std::path::Path;
-
-use winapi::um::fileapi::{
-    BY_HANDLE_FILE_INFORMATION,
-    GetFileInformationByHandle,
-};
-use winapi::um::winbase::FILE_FLAG_BACKUP_SEMANTICS;
-
-/// Return metadata for the file at the given path.
-pub fn windows_file_handle_info<P: AsRef<Path>>(
-    path: P,
-) -> Result<BY_HANDLE_FILE_INFORMATION, Error> {
-    // The FILE_FLAG_BACKUP_SEMANTICS flag is needed to open directories
-    // https://msdn.microsoft.com/en-us/library/windows/desktop/aa365258(v=vs.85).aspx
-    let file = OpenOptions::new()
-        .create(false)
-        .write(false)
-        .read(true)
-        .custom_flags(FILE_FLAG_BACKUP_SEMANTICS)
-        .open(path)?;
-
-    unsafe {
-        let mut info = mem::zeroed();
-        if GetFileInformationByHandle(file.as_raw_handle(), &mut info) == 0 {
-            return Err(Error::last_os_error());
-        }
-        Ok(info)
-    }
-}
-- 
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