mirror of
https://github.com/denoland/rusty_v8.git
synced 2024-12-25 08:39:15 -05:00
72 lines
2.4 KiB
Rust
72 lines
2.4 KiB
Rust
use rusty_v8 as v8;
|
|
|
|
fn main() {
|
|
// Initialize V8.
|
|
let platform = v8::new_default_platform(0, false).make_shared();
|
|
v8::V8::initialize_platform(platform);
|
|
v8::V8::initialize();
|
|
|
|
{
|
|
// Create a new Isolate and make it the current one.
|
|
let isolate = &mut v8::Isolate::new(v8::CreateParams::default());
|
|
|
|
// Create a stack-allocated handle scope.
|
|
let handle_scope = &mut v8::HandleScope::new(isolate);
|
|
|
|
// Create a new context.
|
|
let context = v8::Context::new(handle_scope);
|
|
|
|
// Enter the context for compiling and running the hello world script.
|
|
let scope = &mut v8::ContextScope::new(handle_scope, context);
|
|
|
|
// Create a string containing the JavaScript source code.
|
|
let code = v8::String::new(scope, "'Hello' + ' World!'").unwrap();
|
|
|
|
// Compile the source code.
|
|
let script = v8::Script::compile(scope, code, None).unwrap();
|
|
// Run the script to get the result.
|
|
let result = script.run(scope).unwrap();
|
|
|
|
// Convert the result to a string and print it.
|
|
let result = result.to_string(scope).unwrap();
|
|
println!("{}", result.to_rust_string_lossy(scope));
|
|
|
|
// Use the JavaScript API to generate a WebAssembly module.
|
|
//
|
|
// |bytes| contains the binary format for the following module:
|
|
//
|
|
// (func (export "add") (param i32 i32) (result i32)
|
|
// get_local 0
|
|
// get_local 1
|
|
// i32.add)
|
|
//
|
|
let c_source = r#"
|
|
let bytes = new Uint8Array([
|
|
0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x07, 0x01,
|
|
0x60, 0x02, 0x7f, 0x7f, 0x01, 0x7f, 0x03, 0x02, 0x01, 0x00, 0x07,
|
|
0x07, 0x01, 0x03, 0x61, 0x64, 0x64, 0x00, 0x00, 0x0a, 0x09, 0x01,
|
|
0x07, 0x00, 0x20, 0x00, 0x20, 0x01, 0x6a, 0x0b
|
|
]);
|
|
let module = new WebAssembly.Module(bytes);
|
|
let instance = new WebAssembly.Instance(module);
|
|
instance.exports.add(3, 4);
|
|
"#;
|
|
// Create a string containing the JavaScript source code.
|
|
let source = v8::String::new(scope, c_source).unwrap();
|
|
|
|
// Compile the source code.
|
|
let script = v8::Script::compile(scope, source, None).unwrap();
|
|
|
|
// Run the script to get the result.
|
|
let result = script.run(scope).unwrap();
|
|
|
|
// Print the result.
|
|
let result = result.to_uint32(scope).unwrap();
|
|
println!("3 + 4 = {}", result.value());
|
|
}
|
|
|
|
unsafe {
|
|
v8::V8::dispose();
|
|
}
|
|
v8::V8::shutdown_platform();
|
|
}
|