Fix `File.extname` bug; fix #5077

5bfb70e9 · Yukihiro "Matz" Matsumoto · 8b65e4b7 · 5bfb70e9
Unverified Commit 5bfb70e9 authored Sep 13, 2020 by Yukihiro "Matz" Matsumoto
Hide whitespace changes
Inline Side-by-side

Showing with 3 additions and 3 deletions

mrbgems/mruby-io/mrblib/file.rb mrbgems/mruby-io/mrblib/file.rb +3 -3

No files found.
--- a/mrbgems/mruby-io/mrblib/file.rb
+++ b/mrbgems/mruby-io/mrblib/file.rb
@@ -191,9 +191,9 @@ class File < IO

  def self.extname(filename)
    fname = self.basename(filename)
-    return '' if fname[0] == '.' || fname.index('.').nil?
-    ext = fname.split('.').last
-    ext.empty? ? '' : ".#{ext}"
+    epos = fname.rindex('.')
+    return '' if epos == 0 || epos.nil?
+    return fname[epos..-1]
  end

  def self.path(filename)