BUG: to_clipboard text truncated for Python 3 on Windows for UTF-16 text

pandas/io/clipboard/windows.py

@@ -3,7 +3,7 @@
 """
 import contextlib
 import ctypes
-from ctypes import c_size_t, c_wchar, c_wchar_p, get_errno, sizeof
+from ctypes import c_char_p, c_size_t, c_wchar, c_wchar_p, get_errno, sizeof
 import time
 
 from .exceptions import PyperclipWindowsException
@@ -129,13 +129,15 @@ def copy_windows(text):
                     # If the hMem parameter identifies a memory object,
                     # the object must have been allocated using the
                     # function with the GMEM_MOVEABLE flag.
-                    count = len(text) + 1
+                    text = text.encode('utf-16LE')
+                    mem_size = len(text) + sizeof(c_wchar)
                     handle = safeGlobalAlloc(GMEM_MOVEABLE,
-                                             count * sizeof(c_wchar))
+                                             mem_size)
+
                     locked_handle = safeGlobalLock(handle)
 
-                    ctypes.memmove(c_wchar_p(locked_handle),
-                                   c_wchar_p(text), count * sizeof(c_wchar))
+                    ctypes.memmove(c_char_p(locked_handle),
+                                   c_char_p(text), mem_size)
 
                     safeGlobalUnlock(handle)
                     safeSetClipboardData(CF_UNICODETEXT, handle)

pandas/tests/io/test_clipboard.py

@@ -225,3 +225,16 @@ def test_invalid_encoding(self, df):
     @pytest.mark.parametrize('enc', ['UTF-8', 'utf-8', 'utf8'])
     def test_round_trip_valid_encodings(self, enc, df):
         self.check_round_trip_frame(df, encoding=enc)
+
+
+@pytest.mark.single
+@pytest.mark.clipboard
+@pytest.mark.skipif(not _DEPS_INSTALLED,
+                    reason="clipboard primitives not installed")
+class TestRawClipboard(object):
+
+    @pytest.mark.parametrize('data', [u'\U0001f44d...', u'Ωœ∑´...', 'abcd...'])
+    def test_raw_roundtrip(self, data):
+        import pandas.io.clipboard
+        pandas.io.clipboard.clipboard_set(data)
+        assert data == pandas.io.clipboard.clipboard_get()