feat: initial commit of Railtrack Pro prototype with complete test suite

node_modules/@exodus/bytes/multi-byte.js

@@ -0,0 +1,19 @@
+import { assertU8 } from './fallback/_utils.js'
+import { multibyteDecoder, multibyteEncoder } from './fallback/multi-byte.js'
+
+export function createMultibyteDecoder(encoding, loose = false) {
+  const jsDecoder = multibyteDecoder(encoding, loose) // asserts
+  let streaming = false
+  return (arr, stream = false) => {
+    assertU8(arr)
+    if (!streaming && arr.byteLength === 0) return ''
+    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
+}