feat(quickjs): add quickjs

from: https://crates.io/crates/quick-js

quickjs/external/quickjs-rs/libquickjs-sys/src/lib.rs

@@ -0,0 +1,40 @@
+//! FFI Bindings for [quickjs](https://bellard.org/quickjs/),
+//! a Javascript engine.
+//! See the [quickjs](https://crates.io/crates/quickjs) crate for a high-level
+//! wrapper.
+
+#![allow(non_upper_case_globals)]
+#![allow(non_camel_case_types)]
+#![allow(non_snake_case)]
+
+include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
+
+#[cfg(test)]
+mod tests {
+    use std::ffi::CStr;
+
+    use super::*;
+
+    // Small sanity test that starts the runtime and evaluates code.
+    #[test]
+    fn test_eval() {
+        unsafe {
+            let rt = JS_NewRuntime();
+            let ctx = JS_NewContext(rt);
+
+            let code_str = "1 + 1\0";
+            let code = CStr::from_bytes_with_nul(code_str.as_bytes()).unwrap();
+            let script = CStr::from_bytes_with_nul("script\0".as_bytes()).unwrap();
+
+            let value = JS_Eval(
+                ctx,
+                code.as_ptr(),
+                code_str.len() - 1,
+                script.as_ptr(),
+                JS_EVAL_TYPE_GLOBAL as i32,
+            );
+            assert_eq!(value.tag, 0);
+            assert_eq!(value.u.int32, 2);
+        }
+    }
+}