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)

---
 .../@exodus/bytes/encoding-browser.browser.js      | 55 ++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 vanilla/node_modules/@exodus/bytes/encoding-browser.browser.js

(limited to 'vanilla/node_modules/@exodus/bytes/encoding-browser.browser.js')

diff --git a/vanilla/node_modules/@exodus/bytes/encoding-browser.browser.js b/vanilla/node_modules/@exodus/bytes/encoding-browser.browser.js
new file mode 100644
index 0000000..e8333b4
--- /dev/null
+++ b/vanilla/node_modules/@exodus/bytes/encoding-browser.browser.js
@@ -0,0 +1,55 @@
+import { getBOMEncoding } from './fallback/encoding.api.js'
+
+// Lite-weight version which re-exports existing implementations on browsers,
+// while still being aliased to the full impl in RN and Node.js
+
+// WARNING: Note that browsers have bugs (which hopefully will get fixed soon)
+
+const { TextDecoder, TextEncoder, TextDecoderStream, TextEncoderStream } = globalThis
+
+export { getBOMEncoding } from './fallback/encoding.api.js'
+export { TextDecoder, TextEncoder, TextDecoderStream, TextEncoderStream }
+
+export function normalizeEncoding(label) {
+  if (label === 'utf-8' || label === 'utf8' || label === 'UTF-8' || label === 'UTF8') return 'utf-8'
+  if (label === 'windows-1252' || label === 'ascii' || label === 'latin1') return 'windows-1252'
+  if (/[^\w\t\n\f\r .:-]/i.test(label)) return null
+  const l = `${label}`.trim().toLowerCase()
+  try {
+    return new TextDecoder(l).encoding
+  } catch {}
+
+  if (l === 'x-user-defined') return l
+  if (
+    l === 'replacement' ||
+    l === 'csiso2022kr' ||
+    l === 'hz-gb-2312' ||
+    l === 'iso-2022-cn' ||
+    l === 'iso-2022-cn-ext' ||
+    l === 'iso-2022-kr'
+  ) {
+    return 'replacement'
+  }
+
+  return null
+}
+
+export function legacyHookDecode(input, fallbackEncoding = 'utf-8') {
+  const enc = getBOMEncoding(input) ?? normalizeEncoding(fallbackEncoding)
+  if (enc === 'replacement') return input.byteLength > 0 ? '\uFFFD' : ''
+  return new TextDecoder(enc).decode(input)
+}
+
+export function labelToName(label) {
+  const enc = normalizeEncoding(label)
+  if (enc === 'utf-8') return 'UTF-8'
+  if (!enc) return enc
+  const p = enc.slice(0, 3)
+  if (p === 'utf' || p === 'iso' || p === 'koi' || p === 'euc' || p === 'ibm' || p === 'gbk') {
+    return enc.toUpperCase()
+  }
+
+  if (enc === 'big5') return 'Big5'
+  if (enc === 'shift_jis') return 'Shift_JIS'
+  return enc
+}
-- 
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