From 1f2d48cd975b719f0248e471f3b503cb01398dfb Mon Sep 17 00:00:00 2001
From: Nathan Whitaker <17734409+nathanwhit@users.noreply.github.com>
Date: Wed, 14 Aug 2024 09:42:31 -0700
Subject: fix(node/fs): node:fs.read and write should accept typed arrays other
 than Uint8Array (#25030)

Part of #25028.

Our underlying read/write operations in `io` assume the buffer is a
Uint8Array, but we were passing in other typed arrays (in the case above
it was `Int8Array`).
---
 ext/node/polyfills/internal/fs/utils.mjs | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'ext/node/polyfills/internal/fs/utils.mjs')

diff --git a/ext/node/polyfills/internal/fs/utils.mjs b/ext/node/polyfills/internal/fs/utils.mjs
index 9f3322bae..53184b9c3 100644
--- a/ext/node/polyfills/internal/fs/utils.mjs
+++ b/ext/node/polyfills/internal/fs/utils.mjs
@@ -986,6 +986,16 @@ export const validatePosition = hideStackFrames((position) => {
   }
 });
 
+/** @type {(buffer: ArrayBufferView) => Uint8Array} */
+export const arrayBufferViewToUint8Array = hideStackFrames(
+  (buffer) => {
+    if (!(buffer instanceof Uint8Array)) {
+      return new Uint8Array(buffer.buffer);
+    }
+    return buffer;
+  },
+);
+
 export const realpathCacheKey = Symbol("realpathCacheKey");
 export const constants = {
   kIoMaxLength,
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