54 lines
1.5 KiB
Python
54 lines
1.5 KiB
Python
# This file is part of Compute
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#
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# Compute is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Compute is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Compute. If not, see <http://www.gnu.org/licenses/>.
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"""Tools for data units convertion."""
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from enum import StrEnum
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from compute.exceptions import InvalidDataUnitError
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class DataUnit(StrEnum):
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"""Data units enumeration."""
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BYTES = 'bytes'
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KIB = 'KiB'
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MIB = 'MiB'
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GIB = 'GiB'
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TIB = 'TiB'
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@classmethod
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def _missing_(cls, name: str) -> 'DataUnit':
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for member in cls:
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if member.name.lower() == name.lower():
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return member
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return None
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def to_bytes(value: int, unit: DataUnit = DataUnit.BYTES) -> int:
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"""Convert value to bytes. See :class:`DataUnit`."""
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try:
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_ = DataUnit(unit)
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except ValueError as e:
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raise InvalidDataUnitError(e, list(DataUnit)) from e
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powers = {
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DataUnit.BYTES: 0,
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DataUnit.KIB: 1,
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DataUnit.MIB: 2,
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DataUnit.GIB: 3,
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DataUnit.TIB: 4,
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}
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return value * pow(1024, powers[unit])
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