move rust-sciter in

libs/rust-sciter/examples/extension/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "extension"
+version = "0.1.0"
+description = "A simple Sciter extension library"
+authors = ["pravic <ehysta@gmail.com>"]
+homepage = "https://sciter.com/include-library-name-native-extensions/"
+edition = "2018"
+publish = false
+
+[lib]
+path = "src/extension.rs"
+crate-type = ["cdylib"]
+test = false
+bench = false
+
+[dependencies]
+sciter-rs = { version = "0.5", path="../../", features = ["extension"] }

libs/rust-sciter/examples/extension/src/extension.rs

@@ -0,0 +1,50 @@
+//! Sciter extension library example.
+//!
+//! See the [blog post](https://sciter.com/include-library-name-native-extensions/).
+
+#[macro_use]
+extern crate sciter;
+
+use sciter::types::{BOOL, VALUE};
+use sciter::Value;
+
+/// Extension entry point.
+#[no_mangle]
+pub extern "system" fn SciterLibraryInit(api: &'static sciter::ISciterAPI, exported: &mut VALUE) -> BOOL {
+	sciter::set_host_api(api);
+
+	let ext_api = vmap! {
+		"add" => add,
+		"sub" => sub,
+	};
+
+	ext_api.pack_to(exported);
+
+	true as BOOL
+}
+
+/// Calculate the sum of all the given arguments.
+pub fn add(args: &[Value]) -> Value {
+	let sum: i32 = args
+		.iter()
+		.map(|v| v.to_int())
+		.filter(|v| v.is_some())
+		.map(|v| v.unwrap())
+		.sum();
+
+	sum.into()
+}
+
+/// `function sub(a, b) { return a - b; }`
+pub fn sub(args: &[Value]) -> std::result::Result<Value, String> {
+	if let [a, b] = args {
+		let a = a.to_int().ok_or("`a` is not an int")?;
+		let b = b.to_int().ok_or("`b` is not an int")?;
+
+		let result = a - b;
+
+		Ok(result.into())
+	} else {
+		Err(format!("sub(a,b) expects 2 parameters, given {} instead.", args.len()))
+	}
+}