From 8d9073370d4ac5179de3213596be4895223a502e Mon Sep 17 00:00:00 2001
From: Kenta Moriuchi <moriken@kimamass.com>
Date: Sun, 19 Feb 2023 17:14:46 +0900
Subject: [PATCH] Add isResizableArrayBuffer

---
 src/_util/is.mjs          | 17 +++++++++++++++++
 src/_util/primordials.mjs |  3 +++
 2 files changed, 20 insertions(+)

diff --git a/src/_util/is.mjs b/src/_util/is.mjs
index 9699cff8..6c162589 100644
--- a/src/_util/is.mjs
+++ b/src/_util/is.mjs
@@ -1,5 +1,6 @@
 import {
   ArrayBufferPrototypeGetByteLength,
+  ArrayBufferPrototypeGetResizable,
   ArrayIsArray,
   ArrayIteratorPrototype,
   ArrayIteratorPrototypeNext,
@@ -97,6 +98,22 @@ export function isAnyArrayBuffer(value) {
   return isArrayBuffer(value) || isSharedArrayBuffer(value);
 }
 
+/**
+ * @param {unknown} value
+ * @returns {boolean}
+ */
+export function isResizableArrayBuffer(value) {
+  if (ArrayBufferPrototypeGetResizable === null) {
+    return false;
+  }
+
+  try {
+    return ArrayBufferPrototypeGetResizable(/** @type {any} */ (value));
+  } catch (e) {
+    return false;
+  }
+}
+
 /**
  * @param {unknown} value
  * @returns {value is unknown[]}
diff --git a/src/_util/primordials.mjs b/src/_util/primordials.mjs
index 72c8bc70..633355f7 100644
--- a/src/_util/primordials.mjs
+++ b/src/_util/primordials.mjs
@@ -118,6 +118,9 @@ const ArrayBufferPrototype = NativeArrayBuffer.prototype;
 export const ArrayBufferPrototypeSlice = uncurryThis(ArrayBufferPrototype.slice);
 /** @type {(buffer: ArrayBuffer) => ArrayBuffer} */
 export const ArrayBufferPrototypeGetByteLength = uncurryThisGetter(ArrayBufferPrototype, "byteLength");
+/** @type {null | ((buffer: ArrayBuffer) => boolean)} */
+export const ArrayBufferPrototypeGetResizable = typeof ArrayBufferPrototype["resize"] !== "undefined" ?
+  uncurryThisGetter(ArrayBufferPrototype, "resizable") : null;
 
 // SharedArrayBuffer
 export const NativeSharedArrayBuffer = typeof SharedArrayBuffer !== "undefined" ? SharedArrayBuffer : null;