From 4798ecc622e9178a7390cfcf0f7b09b3127b9f54 Mon Sep 17 00:00:00 2001
From: Petr Kozelka <petr.kozelka@teradata.com>
Date: Tue, 11 Sep 2018 02:29:57 +0200
Subject: [PATCH] Added Rust to C++ example

---
 rust-to-cpp/Cargo.toml     | 11 +++++++++++
 rust-to-cpp/build.rs       |  8 ++++++++
 rust-to-cpp/src/main.rs    | 11 +++++++++++
 rust-to-cpp/src/triple.cpp |  4 ++++
 4 files changed, 34 insertions(+)
 create mode 100644 rust-to-cpp/Cargo.toml
 create mode 100644 rust-to-cpp/build.rs
 create mode 100644 rust-to-cpp/src/main.rs
 create mode 100644 rust-to-cpp/src/triple.cpp

diff --git a/rust-to-cpp/Cargo.toml b/rust-to-cpp/Cargo.toml
new file mode 100644
index 0000000..efcf0fd
--- /dev/null
+++ b/rust-to-cpp/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "rust-to-cpp"
+version = "0.1.0"
+authors = ["Petr Kozelka <pkozelka@gmail.com>"]
+build = "build.rs"
+
+[dependencies]
+libc = "0.2"
+
+[build-dependencies]
+gcc = "0.3"
diff --git a/rust-to-cpp/build.rs b/rust-to-cpp/build.rs
new file mode 100644
index 0000000..cc7df86
--- /dev/null
+++ b/rust-to-cpp/build.rs
@@ -0,0 +1,8 @@
+extern crate gcc;
+
+fn main() {
+    gcc::Build::new()
+        .file("src/triple.cpp")
+        .cpp(true)
+        .compile("libtriple.a");
+}
diff --git a/rust-to-cpp/src/main.rs b/rust-to-cpp/src/main.rs
new file mode 100644
index 0000000..c02b7e6
--- /dev/null
+++ b/rust-to-cpp/src/main.rs
@@ -0,0 +1,11 @@
+extern crate libc;
+
+extern {
+    fn triple_input(input: libc::c_int) -> libc::c_int;
+}
+
+fn main() {
+    let input = 4;
+    let output = unsafe { triple_input(input) };
+    println!("{} * 3 = {}", input, output);
+}
diff --git a/rust-to-cpp/src/triple.cpp b/rust-to-cpp/src/triple.cpp
new file mode 100644
index 0000000..b6d0757
--- /dev/null
+++ b/rust-to-cpp/src/triple.cpp
@@ -0,0 +1,4 @@
+extern "C"
+int triple_input(int input) {
+    return input * 3;
+}