src: move all 1-byte encodings to native

Co-authored-by: Mert Can Altin <mertgold60@gmail.com>

Author: ChALkeR

lib/internal/encoding.js

@@ -4,11 +4,13 @@
 // https://encoding.spec.whatwg.org
 
 const {
+  ArrayPrototypeMap,
   Boolean,
   ObjectDefineProperties,
   ObjectGetOwnPropertyDescriptors,
   ObjectSetPrototypeOf,
   ObjectValues,
+  SafeArrayIterator,
   SafeMap,
   StringPrototypeSlice,
   Symbol,
@@ -32,8 +34,6 @@ const kFatal = Symbol('kFatal');
 const kUTF8FastPath = Symbol('kUTF8FastPath');
 const kIgnoreBOM = Symbol('kIgnoreBOM');
 
-const { isSinglebyteEncoding, createSinglebyteDecoder } = require('internal/encoding/single-byte');
-
 const {
   getConstructorOf,
   customInspectSymbol: inspect,
@@ -58,6 +58,7 @@ const {
   encodeIntoResults,
   encodeUtf8String,
   decodeUTF8,
+  decodeSingleByte,
 } = binding;
 
 function validateDecoder(obj) {
@@ -71,6 +72,47 @@ const CONVERTER_FLAGS_IGNORE_BOM = 0x4;
 
 const empty = new FastBuffer();
 
+// Has to be synced with src/
+const encodingsSinglebyte = new SafeMap(new SafeArrayIterator(ArrayPrototypeMap([
+  'ibm866',
+  'koi8-r',
+  'koi8-u',
+  'macintosh',
+  'x-mac-cyrillic',
+  'iso-8859-2',
+  'iso-8859-3',
+  'iso-8859-4',
+  'iso-8859-5',
+  'iso-8859-6',
+  'iso-8859-7',
+  'iso-8859-8',
+  'iso-8859-8-i',
+  'iso-8859-10',
+  'iso-8859-13',
+  'iso-8859-14',
+  'iso-8859-15',
+  'iso-8859-16',
+  'windows-874',
+  'windows-1250',
+  'windows-1251',
+  'windows-1252',
+  'windows-1253',
+  'windows-1254',
+  'windows-1255',
+  'windows-1256',
+  'windows-1257',
+  'windows-1258',
+  'x-user-defined', // Has to be last, special case
+], (e, i) => [e, i])));
+
+const isSinglebyteEncoding = (enc) => encodingsSinglebyte.has(enc);
+
+function createSinglebyteDecoder(encoding, fatal) {
+  const key = encodingsSinglebyte.get(encoding);
+  if (key === undefined) throw new ERR_ENCODING_NOT_SUPPORTED(encoding);
+  return (buf) => decodeSingleByte(buf, key, fatal);
+}
+
 const encodings = new SafeMap([
   ['unicode-1-1-utf-8', 'utf-8'],
   ['unicode11utf8', 'utf-8'],
@@ -462,7 +504,7 @@ function makeTextDecoderICU() {
       validateDecoder(this);
       validateObject(options, 'options', kValidateObjectAllowObjectsAndNull);
 
-      if (this[kMethod]) return this[kMethod](parseInput(input));
+      if (this[kMethod]) return this[kMethod](input);
 
       this[kUTF8FastPath] &&= !(options?.stream);
 
@@ -532,11 +574,12 @@ function makeTextDecoderJS() {
 
     decode(input = empty, options = kEmptyObject) {
       validateDecoder(this);
-      input = parseInput(input);
       validateObject(options, 'options', kValidateObjectAllowObjectsAndNull);
 
       if (this[kMethod]) return this[kMethod](input);
 
+      input = parseInput(input);
+
       if (this[kFlags] & CONVERTER_FLAGS_FLUSH) {
         this[kBOMSeen] = false;
       }

lib/internal/encoding/single-byte.js

@@ -88,6 +88,7 @@
       'src/debug_utils.cc',
       'src/embedded_data.cc',
       'src/encoding_binding.cc',
+      'src/encoding_singlebyte.cc',
       'src/env.cc',
       'src/fs_event_wrap.cc',
       'src/handle_wrap.cc',
@@ -219,6 +220,7 @@
       'src/debug_utils-inl.h',
       'src/embedded_data.h',
       'src/encoding_binding.h',
+      'src/encoding_singlebyte.h',
       'src/env_properties.h',
       'src/env.h',
       'src/env-inl.h',