0
0
Fork 0
mirror of https://github.com/denoland/deno.git synced 2024-10-30 09:08:00 -04:00
denoland-deno/cli/ops/random.rs
2020-08-28 17:08:24 +02:00

37 lines
917 B
Rust

// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
use super::dispatch_json::Value;
use crate::state::State;
use deno_core::CoreIsolate;
use deno_core::ErrBox;
use deno_core::ResourceTable;
use deno_core::ZeroCopyBuf;
use rand::thread_rng;
use rand::Rng;
use std::rc::Rc;
pub fn init(i: &mut CoreIsolate, s: &Rc<State>) {
let t = &CoreIsolate::state(i).borrow().resource_table.clone();
i.register_op(
"op_get_random_values",
s.stateful_json_op_sync(t, op_get_random_values),
);
}
fn op_get_random_values(
state: &State,
_resource_table: &mut ResourceTable,
_args: Value,
zero_copy: &mut [ZeroCopyBuf],
) -> Result<Value, ErrBox> {
assert_eq!(zero_copy.len(), 1);
if let Some(seeded_rng) = &state.seeded_rng {
seeded_rng.borrow_mut().fill(&mut *zero_copy[0]);
} else {
let mut rng = thread_rng();
rng.fill(&mut *zero_copy[0]);
}
Ok(json!({}))
}