0c095a98b1
@classmethod are used in Python to represent methods that can query and update the class (cls parameter). Is expected to be used for metaprograming, or advanced techniques that require the access to the class itself, before we have an instance. @staticmethod are used to associate a function to a class. It will not be have access to the instance (self) not the class (cls). In other programming languages are known as class methods. This patch replace all the @classmethod with @staticmethod when there is not need to access to the cls parameter, because the intention is to be used as normal functions.
50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
# Copyright (c) 2015 SUSE Linux GmbH. All rights reserved.
|
|
#
|
|
# This file is part of kiwi.
|
|
#
|
|
# kiwi is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# kiwi is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with kiwi. If not, see <http://www.gnu.org/licenses/>
|
|
#
|
|
import re
|
|
import math
|
|
|
|
from kiwi.exceptions import KiwiSizeError
|
|
|
|
|
|
class StringToSize(object):
|
|
"""
|
|
**Performs size convertions from strings to numbers**
|
|
"""
|
|
@staticmethod
|
|
def to_bytes(size_value):
|
|
"""
|
|
Convert the given string representig a size into the appropriate
|
|
number of bytes.
|
|
|
|
:param str size_value: a size in bytes or specified with m=MB or g=GB
|
|
|
|
:return: the number of bytes represented by size_value string
|
|
:rtype: int
|
|
"""
|
|
size_format = '^(\d+)([gGmM]{0,1})$'
|
|
size = re.search(size_format, size_value)
|
|
if not size:
|
|
raise KiwiSizeError(
|
|
'unsupported size format {0}, must match {1}'.format(
|
|
size_value, size_format
|
|
)
|
|
)
|
|
size_base = int(size.group(1))
|
|
size_unit = {'g': 3, 'm': 2}.get(size.group(2).lower())
|
|
return size_unit and size_base * math.pow(0x400, size_unit) or size_base
|