mirror of
https://github.com/denoland/rusty_v8.git
synced 2024-11-21 15:04:33 -05:00
70 lines
2.4 KiB
Rust
70 lines
2.4 KiB
Rust
fn main() {
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// Initialize V8.
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let platform = v8::new_default_platform(0, false).make_shared();
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v8::V8::initialize_platform(platform);
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v8::V8::initialize();
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{
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// Create a new Isolate and make it the current one.
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let isolate = &mut v8::Isolate::new(v8::CreateParams::default());
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// Create a stack-allocated handle scope.
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let handle_scope = &mut v8::HandleScope::new(isolate);
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// Create a new context.
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let context = v8::Context::new(handle_scope);
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// Enter the context for compiling and running the hello world script.
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let scope = &mut v8::ContextScope::new(handle_scope, context);
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// Create a string containing the JavaScript source code.
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let code = v8::String::new(scope, "'Hello' + ' World!'").unwrap();
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// Compile the source code.
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let script = v8::Script::compile(scope, code, None).unwrap();
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// Run the script to get the result.
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let result = script.run(scope).unwrap();
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// Convert the result to a string and print it.
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let result = result.to_string(scope).unwrap();
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println!("{}", result.to_rust_string_lossy(scope));
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// Use the JavaScript API to generate a WebAssembly module.
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//
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// |bytes| contains the binary format for the following module:
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//
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// (func (export "add") (param i32 i32) (result i32)
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// get_local 0
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// get_local 1
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// i32.add)
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//
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let c_source = r#"
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let bytes = new Uint8Array([
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0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x07, 0x01,
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0x60, 0x02, 0x7f, 0x7f, 0x01, 0x7f, 0x03, 0x02, 0x01, 0x00, 0x07,
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0x07, 0x01, 0x03, 0x61, 0x64, 0x64, 0x00, 0x00, 0x0a, 0x09, 0x01,
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0x07, 0x00, 0x20, 0x00, 0x20, 0x01, 0x6a, 0x0b
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]);
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let module = new WebAssembly.Module(bytes);
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let instance = new WebAssembly.Instance(module);
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instance.exports.add(3, 4);
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"#;
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// Create a string containing the JavaScript source code.
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let source = v8::String::new(scope, c_source).unwrap();
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// Compile the source code.
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let script = v8::Script::compile(scope, source, None).unwrap();
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// Run the script to get the result.
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let result = script.run(scope).unwrap();
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// Print the result.
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let result = result.to_uint32(scope).unwrap();
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println!("3 + 4 = {}", result.value());
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}
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unsafe {
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v8::V8::dispose();
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}
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v8::V8::dispose_platform();
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}
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