Merge remote-tracking branch 'upstream/main'

2026-08-26 09:31:34 +08:00
parent 9b8c4bfab6
commit 394eb0285d
34137 changed files with 3589424 additions and 0 deletions
@@ -0,0 +1,19 @@
+'use strict';
+var commonAlphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
+var base64Alphabet = commonAlphabet + '+/';
+var base64UrlAlphabet = commonAlphabet + '-_';
+
+var inverse = function (characters) {
+  // TODO: use `Object.create(null)` in `core-js@4`
+  var result = {};
+  var index = 0;
+  for (; index < 64; index++) result[characters.charAt(index)] = index;
+  return result;
+};
+
+module.exports = {
+  i2c: base64Alphabet,
+  c2i: inverse(base64Alphabet),
+  i2cUrl: base64UrlAlphabet,
+  c2iUrl: inverse(base64UrlAlphabet)
+};