60 lines
1.5 KiB
Python
60 lines
1.5 KiB
Python
import re
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from typing import Tuple, Union
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import click
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def size_to_byte(value: str) -> int:
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"""Convert any size to Byte
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>>> size_to_byte('1TB')
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1099511627776
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>>> size_to_byte('5kB')
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5120
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>>> size_to_byte('.5kB')
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512
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>>> size_to_byte('.5 yoyo')
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Traceback (most recent call last):
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...
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click.exceptions.BadParameter: Invalid unit for size f{value}
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"""
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convert = {
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"B": 1,
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"kB": 1024,
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"MB": 1024 * 1024,
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"GB": 1024 * 1024 * 1024,
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"TB": 1024 * 1024 * 1024 * 1024,
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}
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val, unit = strtod(value)
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if val is None:
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val = 1
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if unit is None:
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# No unit, all good
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# we can round half bytes dont really make sense
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return round(val)
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else:
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try:
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multiplicateur = convert[unit]
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except KeyError:
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raise click.BadParameter("Invalid unit for size f{value}")
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# we can round half bytes dont really make sense
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return round(val * multiplicateur)
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DBL_RE = re.compile(r"^[-+]?[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?")
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def strtod(value: str) -> Tuple[Union[float, None], Union[str, None]]:
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"""As most as possible close equivalent of strtod(3) function used by postgres to parse parameter values.
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>>> strtod(' A ') == (None, 'A')
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True
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"""
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value = str(value).strip()
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match = DBL_RE.match(value)
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if match:
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end = match.end()
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return float(value[:end]), value[end:]
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return None, value
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