From 76cb9c2a39d477a64824a985ade40507e3bbade1 Mon Sep 17 00:00:00 2001
From: Adam Mathes <adam@adammathes.com>
Date: Fri, 13 Feb 2026 21:34:48 -0800
Subject: feat(vanilla): add testing infrastructure and tests (NK-wjnczv)

---
 .../node_modules/@exodus/bytes/multi-byte.node.js  | 29 ++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 vanilla/node_modules/@exodus/bytes/multi-byte.node.js

(limited to 'vanilla/node_modules/@exodus/bytes/multi-byte.node.js')

diff --git a/vanilla/node_modules/@exodus/bytes/multi-byte.node.js b/vanilla/node_modules/@exodus/bytes/multi-byte.node.js
new file mode 100644
index 0000000..0c605f2
--- /dev/null
+++ b/vanilla/node_modules/@exodus/bytes/multi-byte.node.js
@@ -0,0 +1,29 @@
+import { assertU8, toBuf } from './fallback/_utils.js'
+import { isDeno } from './fallback/platform.js'
+import { isAsciiSuperset, multibyteDecoder, multibyteEncoder } from './fallback/multi-byte.js'
+import { isAscii } from 'node:buffer'
+
+export function createMultibyteDecoder(encoding, loose = false) {
+  const jsDecoder = multibyteDecoder(encoding, loose) // asserts
+  let streaming = false
+  const asciiSuperset = isAsciiSuperset(encoding)
+  return (arr, stream = false) => {
+    assertU8(arr)
+    if (!streaming) {
+      if (arr.byteLength === 0) return ''
+      if (asciiSuperset && isAscii(arr)) {
+        if (isDeno) return toBuf(arr).toString()
+        return toBuf(arr).latin1Slice(0, arr.byteLength) // .latin1Slice is faster than .asciiSlice
+      }
+    }
+
+    streaming = stream
+    return jsDecoder(arr, stream)
+  }
+}
+
+export function createMultibyteEncoder(encoding, { mode = 'fatal' } = {}) {
+  // TODO: replacement, truncate (replacement will need varying length)
+  if (mode !== 'fatal') throw new Error('Unsupported mode')
+  return multibyteEncoder(encoding) // asserts
+}
-- 
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