1 files changed, 59 insertions, 0 deletions
diff --git a/third_party/rust/wio/src/wide.rs b/third_party/rust/wio/src/wide.rs
new file mode 100644
index 0000000000..0b4d9fe416
--- /dev/null
+++ b/third_party/rust/wio/src/wide.rs
@@ -0,0 +1,59 @@
+// Licensed under the Apache License, Version 2.0
+// <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
+// All files in the project carrying such notice may not be copied, modified, or distributed
+// except according to those terms.
+use std::ffi::{OsStr, OsString};
+use std::os::windows::ffi::{OsStrExt, OsStringExt};
+use std::path::PathBuf;
+use std::slice::from_raw_parts;
+
+pub trait ToWide {
+    fn to_wide(&self) -> Vec<u16>;
+    fn to_wide_null(&self) -> Vec<u16>;
+}
+impl<T> ToWide for T where T: AsRef<OsStr> {
+    #[inline]
+    fn to_wide(&self) -> Vec<u16> {
+        self.as_ref().encode_wide().collect()
+    }
+    #[inline]
+    fn to_wide_null(&self) -> Vec<u16> {
+        self.as_ref().encode_wide().chain(Some(0)).collect()
+    }
+}
+pub trait FromWide where Self: Sized {
+    fn from_wide(wide: &[u16]) -> Self;
+    #[inline]
+    fn from_wide_null(wide: &[u16]) -> Self {
+        let len = wide.iter().take_while(|&&c| c != 0).count();
+        Self::from_wide(&wide[..len])
+    }
+    #[inline]
+    unsafe fn from_wide_ptr(wide: *const u16, len: usize) -> Self {
+        assert!(!wide.is_null());
+        Self::from_wide(from_raw_parts(wide, len))
+    }
+    #[inline]
+    unsafe fn from_wide_ptr_null(wide: *const u16) -> Self {
+        assert!(!wide.is_null());
+        for i in 0.. {
+            if *wide.offset(i) == 0 {
+                return Self::from_wide_ptr(wide, i as usize)
+            }
+        }
+        unreachable!()
+    }
+}
+impl FromWide for OsString {
+    #[inline]
+    fn from_wide(wide: &[u16]) -> OsString {
+        OsStringExt::from_wide(wide)
+    }
+}
+impl FromWide for PathBuf {
+    #[inline]
+    fn from_wide(wide: &[u16]) -> PathBuf {
+        <OsString as OsStringExt>::from_wide(wide).into()
+    }
+}