io: Add From impls to convert between ErrorKind and std::io::ErrorKind.

Author: Dirbaio

embedded-io/CHANGELOG.md

@@ -7,7 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
-- Added `ReadReady`, `WriteReady` traits. They allow peeking whether the I/O handle is ready to read/write, so they allow using the traits in a non-blocking way.
+- Add `ReadReady`, `WriteReady` traits. They allow peeking whether the I/O handle is ready to read/write, so they allow using the traits in a non-blocking way.
+- Add variants to `ErrorKind` mirroring `std::io::ErrorKind`.
+- Add `From` impls to convert between `ErrorKind` and `std::io::ErrorKind`.
 - Moved `embedded_io::blocking` to the crate root.
 - Split async traits to the `embedded-io-async` crate.
 - Split async trait adapters to separate crates.

embedded-io/src/lib.rs

@@ -92,6 +92,58 @@ pub enum ErrorKind {
     OutOfMemory,
 }
 
+#[cfg(feature = "std")]
+#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
+impl From<ErrorKind> for std::io::ErrorKind {
+    fn from(value: ErrorKind) -> Self {
+        match value {
+            ErrorKind::NotFound => std::io::ErrorKind::NotFound,
+            ErrorKind::PermissionDenied => std::io::ErrorKind::PermissionDenied,
+            ErrorKind::ConnectionRefused => std::io::ErrorKind::ConnectionRefused,
+            ErrorKind::ConnectionReset => std::io::ErrorKind::ConnectionReset,
+            ErrorKind::ConnectionAborted => std::io::ErrorKind::ConnectionAborted,
+            ErrorKind::NotConnected => std::io::ErrorKind::NotConnected,
+            ErrorKind::AddrInUse => std::io::ErrorKind::AddrInUse,
+            ErrorKind::AddrNotAvailable => std::io::ErrorKind::AddrNotAvailable,
+            ErrorKind::BrokenPipe => std::io::ErrorKind::BrokenPipe,
+            ErrorKind::AlreadyExists => std::io::ErrorKind::AlreadyExists,
+            ErrorKind::InvalidInput => std::io::ErrorKind::InvalidInput,
+            ErrorKind::InvalidData => std::io::ErrorKind::InvalidData,
+            ErrorKind::TimedOut => std::io::ErrorKind::TimedOut,
+            ErrorKind::Interrupted => std::io::ErrorKind::Interrupted,
+            ErrorKind::Unsupported => std::io::ErrorKind::Unsupported,
+            ErrorKind::OutOfMemory => std::io::ErrorKind::OutOfMemory,
+            _ => std::io::ErrorKind::Other,
+        }
+    }
+}
+
+#[cfg(feature = "std")]
+#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
+impl From<std::io::ErrorKind> for ErrorKind {
+    fn from(value: std::io::ErrorKind) -> Self {
+        match value {
+            std::io::ErrorKind::NotFound => ErrorKind::NotFound,
+            std::io::ErrorKind::PermissionDenied => ErrorKind::PermissionDenied,
+            std::io::ErrorKind::ConnectionRefused => ErrorKind::ConnectionRefused,
+            std::io::ErrorKind::ConnectionReset => ErrorKind::ConnectionReset,
+            std::io::ErrorKind::ConnectionAborted => ErrorKind::ConnectionAborted,
+            std::io::ErrorKind::NotConnected => ErrorKind::NotConnected,
+            std::io::ErrorKind::AddrInUse => ErrorKind::AddrInUse,
+            std::io::ErrorKind::AddrNotAvailable => ErrorKind::AddrNotAvailable,
+            std::io::ErrorKind::BrokenPipe => ErrorKind::BrokenPipe,
+            std::io::ErrorKind::AlreadyExists => ErrorKind::AlreadyExists,
+            std::io::ErrorKind::InvalidInput => ErrorKind::InvalidInput,
+            std::io::ErrorKind::InvalidData => ErrorKind::InvalidData,
+            std::io::ErrorKind::TimedOut => ErrorKind::TimedOut,
+            std::io::ErrorKind::Interrupted => ErrorKind::Interrupted,
+            std::io::ErrorKind::Unsupported => ErrorKind::Unsupported,
+            std::io::ErrorKind::OutOfMemory => ErrorKind::OutOfMemory,
+            _ => ErrorKind::Other,
+        }
+    }
+}
+
 /// Error trait.
 ///
 /// This trait allows generic code to do limited inspecting of errors,