From abca643dd4175aba98b617d16c4af4d5d7e898cb Mon Sep 17 00:00:00 2001
From: Wesley Hill <wesley@hakobaito.co.uk>
Date: Mon, 18 Nov 2019 14:40:16 +0000
Subject: [PATCH] Add c# to rust example

---
 csharp-to-rust/.gitignore    |  3 +++
 csharp-to-rust/Cargo.toml    |  8 ++++++++
 csharp-to-rust/Makefile      |  9 +++++++++
 csharp-to-rust/src/double.cs | 15 +++++++++++++++
 csharp-to-rust/src/lib.rs    |  4 ++++
 5 files changed, 39 insertions(+)
 create mode 100644 csharp-to-rust/.gitignore
 create mode 100644 csharp-to-rust/Cargo.toml
 create mode 100644 csharp-to-rust/Makefile
 create mode 100644 csharp-to-rust/src/double.cs
 create mode 100644 csharp-to-rust/src/lib.rs

diff --git a/csharp-to-rust/.gitignore b/csharp-to-rust/.gitignore
new file mode 100644
index 0000000..6936990
--- /dev/null
+++ b/csharp-to-rust/.gitignore
@@ -0,0 +1,3 @@
+/target
+**/*.rs.bk
+Cargo.lock
diff --git a/csharp-to-rust/Cargo.toml b/csharp-to-rust/Cargo.toml
new file mode 100644
index 0000000..bea8dbb
--- /dev/null
+++ b/csharp-to-rust/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "csharp-to-rust"
+version = "0.1.0"
+authors = ["Wesley Hill <wesley@hakobaito.co.uk>"]
+
+[lib]
+name = "double_input"
+crate-type = ["cdylib"]
diff --git a/csharp-to-rust/Makefile b/csharp-to-rust/Makefile
new file mode 100644
index 0000000..ac1d60c
--- /dev/null
+++ b/csharp-to-rust/Makefile
@@ -0,0 +1,9 @@
+all: target/debug/libdouble_input
+	csc src/double.cs
+	mono ./double.exe
+
+target/debug/libdouble_input: src/lib.rs Cargo.toml
+	rustc --crate-name double_input src/lib.rs --crate-type cdylib -o libdouble_input
+
+clean:
+	rm -rf target double.exe
diff --git a/csharp-to-rust/src/double.cs b/csharp-to-rust/src/double.cs
new file mode 100644
index 0000000..174f7c5
--- /dev/null
+++ b/csharp-to-rust/src/double.cs
@@ -0,0 +1,15 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace DoubleClass {
+
+    class Double {
+        [DllImport ("libdouble_input")]
+        public static extern int double_input (int input);
+
+
+        public static void Main (string[] args) {
+            Console.WriteLine (double_input (2));
+        }
+    }
+}
diff --git a/csharp-to-rust/src/lib.rs b/csharp-to-rust/src/lib.rs
new file mode 100644
index 0000000..03c626e
--- /dev/null
+++ b/csharp-to-rust/src/lib.rs
@@ -0,0 +1,4 @@
+#[no_mangle]
+pub extern fn double_input(input: i32) -> i32 {
+    input * 2
+}
\ No newline at end of file