1 files changed, 58 insertions, 0 deletions
diff --git a/ext/nkf/lib/kconv.rb b/ext/nkf/lib/kconv.rb
new file mode 100644
index 0000000000..bfd276330d
--- /dev/null
+++ b/ext/nkf/lib/kconv.rb
@@ -0,0 +1,58 @@
+require 'nkf'
+
+module Kconv
+  AUTO = NKF::AUTO
+  JIS = NKF::JIS
+  EUC = NKF::EUC
+  SJIS = NKF::SJIS
+  BINARY = NKF::BINARY
+  NOCONV = NKF::NOCONV
+  UNKNOWN = NKF::UNKNOWN
+  def kconv(str, out_code, in_code = AUTO)
+    opt = '-'
+    case in_code
+    when NKF::JIS
+      opt << 'J'
+    when NKF::EUC
+      opt << 'E'
+    when NKF::SJIS
+      opt << 'S'
+    end
+
+    case out_code
+    when NKF::JIS
+      opt << 'j'
+    when NKF::EUC
+      opt << 'e'
+    when NKF::SJIS
+      opt << 's'
+    when NKF::NOCONV
+      return str
+    end
+
+    opt = '' if opt == '-'
+
+    NKF::nkf(opt, str)
+  end
+  module_function :kconv
+
+  def tojis(str)
+    NKF::nkf('-j', str)
+  end
+  module_function :tojis
+
+  def toeuc(str)
+    NKF::nkf('-e', str)
+  end
+  module_function :toeuc
+
+  def tosjis(str)
+    NKF::nkf('-s', str)
+  end
+  module_function :tosjis
+
+  def guess(str)
+    NKF::guess(str)
+  end
+  module_function :guess
+end