From 47b7d6e36914774534f4a80315c8d38e0424a2db Mon Sep 17 00:00:00 2001
From: Matt Corallo <git@bluematt.me>
Date: Tue, 13 Apr 2021 22:58:32 -0400
Subject: [PATCH] Implement conversion of std::io::Error to Rust

---
 c-bindings-gen/src/types.rs             |  2 ++
 lightning-c-bindings/src/c_types/mod.rs | 22 ++++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/c-bindings-gen/src/types.rs b/c-bindings-gen/src/types.rs
index bd0c9c5..6ea8e28 100644
--- a/c-bindings-gen/src/types.rs
+++ b/c-bindings-gen/src/types.rs
@@ -950,6 +950,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
 
 			"str" if is_ref => Some(""),
 			"alloc::string::String"|"String" => Some(""),
+			"std::io::Error" if !is_ref => Some(""),
 			// Note that we'll panic for String if is_ref, as we only have non-owned memory, we
 			// cannot create a &String.
 
@@ -1016,6 +1017,7 @@ impl<'a, 'c: 'a> TypeResolver<'a, 'c> {
 
 			"str" if is_ref => Some(".into_str()"),
 			"alloc::string::String"|"String" => Some(".into_string()"),
+			"std::io::Error" if !is_ref => Some(".to_rust()"),
 
 			"std::time::Duration"|"core::time::Duration" => Some(")"),
 			"std::time::SystemTime" => Some("))"),
diff --git a/lightning-c-bindings/src/c_types/mod.rs b/lightning-c-bindings/src/c_types/mod.rs
index 6267b80..b6b1bbf 100644
--- a/lightning-c-bindings/src/c_types/mod.rs
+++ b/lightning-c-bindings/src/c_types/mod.rs
@@ -198,6 +198,28 @@ impl IOError {
 			_ => IOError::Other,
 		}
 	}
+	pub(crate) fn to_rust(&self) -> std::io::Error {
+		std::io::Error::new(match self {
+			IOError::NotFound => std::io::ErrorKind::NotFound,
+			IOError::PermissionDenied => std::io::ErrorKind::PermissionDenied,
+			IOError::ConnectionRefused => std::io::ErrorKind::ConnectionRefused,
+			IOError::ConnectionReset => std::io::ErrorKind::ConnectionReset,
+			IOError::ConnectionAborted => std::io::ErrorKind::ConnectionAborted,
+			IOError::NotConnected => std::io::ErrorKind::NotConnected,
+			IOError::AddrInUse => std::io::ErrorKind::AddrInUse,
+			IOError::AddrNotAvailable => std::io::ErrorKind::AddrNotAvailable,
+			IOError::BrokenPipe => std::io::ErrorKind::BrokenPipe,
+			IOError::AlreadyExists => std::io::ErrorKind::AlreadyExists,
+			IOError::WouldBlock => std::io::ErrorKind::WouldBlock,
+			IOError::InvalidInput => std::io::ErrorKind::InvalidInput,
+			IOError::InvalidData => std::io::ErrorKind::InvalidData,
+			IOError::TimedOut => std::io::ErrorKind::TimedOut,
+			IOError::WriteZero => std::io::ErrorKind::WriteZero,
+			IOError::Interrupted => std::io::ErrorKind::Interrupted,
+			IOError::Other => std::io::ErrorKind::Other,
+			IOError::UnexpectedEof => std::io::ErrorKind::UnexpectedEof,
+		}, "")
+	}
 }
 
 #[repr(C)]
-- 
2.30.2