(WIP) rusty_qjs
Rust bindings to QuickJS.
Todo
- JSValue::new_... returns a Result
- specific JSValue type, like JsString, JsNumber...?
- catch unwind for extern "C" fn?
Feature
local
The JSValue of QuickJS is using reference counting to manage the memory. So we create a Local handle to help you free the JSValue. The Local will call JS_FreeValue when it drops. You can simply use to_local to convert a JSValue into a Local handle, then enjoy the conveniences of it.
Example
use rusty_qjs::{JSContext, JSRuntime, JSValue};
use std::io::Write;
fn js_print(ctx: &mut JSContext, _this: JSValue, argv: &[JSValue]) -> JSValue {
let output = argv
.iter()
.map(|value| value.to_rust_string(ctx))
.collect::<Vec<String>>()
.join(" ");
let mut stdout = std::io::stdout();
stdout.write_all(output.as_bytes()).unwrap();
stdout.write_all(b"\n").unwrap();
JSValue::new_undefined()
}
fn setup_console(ctx: &mut JSContext) {
let global = ctx.get_global_object().to_local(ctx);
let console = JSValue::new_object(ctx).to_local(ctx);
let log = JSValue::new_function(ctx, js_print, "log", 1).to_local(ctx);
console.set_property_str("log", log).unwrap();
global.set_property_str("console", console).unwrap();
}
fn main() {
let rt = &mut JSRuntime::new();
let ctx = &mut JSContext::new(rt);
setup_console(ctx);
ctx.eval_script("console.log(\"hello world\")", "<test>");
}
For a more in-depth example, look at qtok
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