From 90189dd9974be01596ec776e63a4eceef1a036e0 Mon Sep 17 00:00:00 2001
From: Kenta Moriuchi <moriken@kimamass.com>
Date: Tue, 7 Nov 2023 06:18:28 +0900
Subject: fix(ext): use `String#toWellFormed` in ext/webidl and ext/node
 (#21054)

Fixes #18802

This PR adds `util.toUSVString` to node:util:

```js
import util from "node:util";
util.toUSVString("string\ud801"); // => "string\ufffd"
```
---
 ext/node/polyfills/util.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'ext/node/polyfills')

diff --git a/ext/node/polyfills/util.ts b/ext/node/polyfills/util.ts
index 1b611b1fd..2e25746ef 100644
--- a/ext/node/polyfills/util.ts
+++ b/ext/node/polyfills/util.ts
@@ -37,7 +37,9 @@ const {
   SafeSet,
   SetPrototypeAdd,
   SetPrototypeHas,
+  StringPrototypeIsWellFormed,
   StringPrototypePadStart,
+  StringPrototypeToWellFormed,
 } = primordials;
 
 export {
@@ -187,6 +189,13 @@ export const TextDecoder = _TextDecoder;
 export type TextEncoder = import("./_utils.ts")._TextEncoder;
 export const TextEncoder = _TextEncoder;
 
+export function toUSVString(str: string): string {
+  if (StringPrototypeIsWellFormed(str)) {
+    return str;
+  }
+  return StringPrototypeToWellFormed(str);
+}
+
 function pad(n: number) {
   return StringPrototypePadStart(NumberPrototypeToString(n), 2, "0");
 }
@@ -309,6 +318,7 @@ export default {
   stripVTControlCharacters,
   TextDecoder,
   TextEncoder,
+  toUSVString,
   log,
   debuglog,
   isDeepStrictEqual,
-- 
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