##############################################################################

#

# Copyright (c) 2006 Zope Foundation and Contributors.

# All Rights Reserved.

#

# This software is subject to the provisions of the Zope Public License,

# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.

# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED

# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS

# FOR A PARTICULAR PURPOSE.

#

##############################################################################

"""Basic components support

"""

from __future__ import absolute_import

import sys

import types

if sys.version_info[0] < 3:

    def _normalize_name(name):

        if isinstance(name, basestring):

            return unicode(name)

        raise TypeError("name must be a regular or unicode string")

    CLASS_TYPES = (type, types.ClassType)

    STRING_TYPES = (basestring,)

    _BUILTINS = '__builtin__'

    PYTHON3 = False

    PYTHON2 = True

else:

    def _normalize_name(name):

        if isinstance(name, bytes):

            name = str(name, 'ascii')

        if isinstance(name, str):

            return name

        raise TypeError("name must be a string or ASCII-only bytes")

    CLASS_TYPES = (type,)

    STRING_TYPES = (str,)

    _BUILTINS = 'builtins'

    PYTHON3 = True

    PYTHON2 = False

def _skip_under_py3k(test_method):

    import unittest

    return unittest.skipIf(sys.version_info[0] >= 3, "Only on Python 2")(test_method)

def _skip_under_py2(test_method):

    import unittest

    return unittest.skipIf(sys.version_info[0] < 3, "Only on Python 3")(test_method)