1use js_sys::Promise;
2use wasm_bindgen::prelude::*;
3use wasm_bindgen_futures::JsFuture;
4
5pub(crate) async fn promise_to_void_future(promise: Promise) -> Result<(), JsValue> {
6 let js_value = JsFuture::from(promise).await?;
7 debug_assert!(js_value.is_undefined());
8 let _ = js_value;
9 Ok(())
10}
11
12pub(crate) fn clamp_to_u32(value: usize) -> u32 {
13 let wrapped = value as u32;
14 let overflow = value != (wrapped as usize);
15 if overflow {
16 u32::MAX
17 } else {
18 wrapped
19 }
20}
21
22pub(crate) fn clamp_to_usize(value: u32) -> usize {
23 let wrapped = value as usize;
24 let overflow = value != (wrapped as u32);
25 if overflow {
26 usize::MAX
27 } else {
28 wrapped
29 }
30}
31
32pub(crate) fn checked_cast_to_u32(value: usize) -> u32 {
33 let wrapped = value as u32;
34 debug_assert_eq!(value, wrapped as usize);
35 wrapped
36}
37
38pub(crate) fn checked_cast_to_usize(value: u32) -> usize {
39 let wrapped = value as usize;
40 debug_assert_eq!(value, wrapped as u32);
41 wrapped
42}
43
44pub(crate) fn js_to_io_error(js_value: JsValue) -> std::io::Error {
45 let message = js_to_string(&js_value).unwrap_or_else(|| "Unknown error".to_string());
46 std::io::Error::new(std::io::ErrorKind::Other, message)
47}
48
49fn js_to_string(js_value: &JsValue) -> Option<String> {
50 js_value.as_string().or_else(|| {
51 js_sys::Object::try_from(js_value)
52 .map(|js_object| js_object.to_string().as_string().unwrap_throw())
53 })
54}