64 lines
1.7 KiB
Python
64 lines
1.7 KiB
Python
# Copyright 2015, Rackspace US, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# (c) 2015, Kevin Carter <kevin.carter@rackspace.com>
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import hashlib
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"""Filter usage:
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Simple filters that may be useful from within the stack
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"""
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def bit_length_power_of_2(value):
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"""Return the smallest power of 2 greater than a numeric value.
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:param value: Number to find the smallest power of 2
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:type value: ``int``
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:returns: ``int``
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"""
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return 2 ** (int(value) - 1).bit_length()
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def string_2_int(string):
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"""Return the an integer from a string.
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The string is hashed, converted to a base36 int, and the modulo of 10240
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is returned.
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:param string: string to retrieve an int from
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:type string: ``str``
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:returns: ``int``
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"""
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# Try to encode utf-8 else pass
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try:
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string = string.encode('utf-8')
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except AttributeError:
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pass
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hashed_name = hashlib.sha256(string).hexdigest()
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return int(hashed_name, 36) % 10240
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class FilterModule(object):
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"""Ansible jinja2 filters."""
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@staticmethod
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def filters():
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return {
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'bit_length_power_of_2': bit_length_power_of_2,
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'string_2_int': string_2_int
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}
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