#!/usr/bin/env python

#

# Copyright 2007 Google Inc.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#     http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

#

"""Stub replacement for Python's imp module."""

import os

import sys

PY_SOURCE, PY_COMPILED, C_EXTENSION = 1, 2, 3

PKG_DIRECTORY, C_BUILTIN, PY_FROZEN = 5, 6, 7

def get_magic():

  return '\0\0\0\0'

def get_suffixes():

  return [('.py', 'U', PY_SOURCE)]

def new_module(name):

  return type(sys.modules[__name__])(name)

def lock_held():

  """Return False since threading is not supported."""

  return False

def acquire_lock():

  """Acquiring the lock is a no-op since no threading is supported."""

  pass

def release_lock():

  """There is no lock to release since acquiring is a no-op when there is no

  threading."""

  pass

def is_builtin(name):

  return name in sys.builtin_module_names

def is_frozen(name):

  return False

class NullImporter(object):

  def __init__(self, path_string):

    if not path_string:

      raise ImportError("empty pathname")

    elif os.path.isdir(path_string):

      raise ImportError("existing directory")

  def find_module(self, fullname):

    return None