Merge pull request #8 from livioribeiro/master

Add lua (luajit) example

luajit-to-rust/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "luajit-to-rust"
+version = "0.1.0"
+# Modified based on python version
+authors = ["Livio Ribeiro <livioribeiro@outlook.com>"]
+
+[lib]
+name = "double_input"
+crate-type = ["dylib"]

luajit-to-rust/Makefile

@@ -0,0 +1,14 @@
+ifeq ($(shell uname),Darwin)
+    EXT := dylib
+else
+    EXT := so
+endif
+
+all: target/debug/libdouble_input.$(EXT)
+	luajit src/main.lua
+
+target/debug/libdouble_input.$(EXT): src/lib.rs Cargo.toml
+	cargo build
+
+clean:
+	rm -rf target

luajit-to-rust/src/lib.rs

@@ -0,0 +1,4 @@
+#[no_mangle]
+pub extern fn double_input(input: i32) -> i32 {
+    input * 2
+}

luajit-to-rust/src/main.lua

@@ -0,0 +1,21 @@
+local ffi = require('ffi')
+
+local ext
+
+if ffi.os == 'Linux' then
+    ext = 'so'
+else
+    ext = 'dylib'
+end
+
+ffi.cdef[[
+int32_t double_input(int32_t input);
+]]
+
+local lib = ffi.load('target/debug/libdouble_input.' .. ext)
+local double_input = lib.double_input
+
+local input = 4
+local output = double_input(input)
+
+print(input .. " * 2 = " .. output)