Merge branch '0.29.x'

Cython/Includes/cpython/unicode.pxd

@@ -10,5 +10,9 @@
 
     # Return the size of the object. o has to be a PyUnicodeObject
     # (not checked).
+    #
+    # Deprecated since version 3.3, will be removed in version 3.10:
+    # Part of the old-style Unicode API, please migrate to using
+    # PyUnicode_GET_LENGTH().
     Py_ssize_t PyUnicode_GET_SIZE(object o)
 
@@ -13,5 +17,12 @@
     Py_ssize_t PyUnicode_GET_SIZE(object o)
 
+    # Return the length of the Unicode string, in code points. o has
+    # to be a Unicode object in the “canonical” representation (not
+    # checked).
+    #
+    # New in version 3.3.
+    Py_ssize_t PyUnicode_GET_LENGTH(object o)
+
     # Return the size of the object's internal buffer in bytes. o has
     # to be a PyUnicodeObject (not checked).
     Py_ssize_t PyUnicode_GET_DATA_SIZE(object o)

Cython/Utility/ImportExport.c

@@ -300,7 +300,7 @@
             PyString_AS_STRING(name)[0] == '_')
 #else
             PyUnicode_Check(name) &&
-            PyUnicode_AS_UNICODE(name)[0] == '_')
+            __Pyx_PyUnicode_READ_CHAR(name, 0) == '_')
 #endif
         {
             Py_DECREF(name);