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| -rw-r--r-- | python/vyos/util.py | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/python/vyos/util.py b/python/vyos/util.py index e4e2a44ec..a80584c5a 100644 --- a/python/vyos/util.py +++ b/python/vyos/util.py @@ -574,6 +574,37 @@ def bytes_to_human(bytes, initial_exponent=0): size_string = "{0:.2f} {1}".format(value, suffix) return size_string +def human_to_bytes(value): + """ Converts a data amount with a unit suffix to bytes, like 2K to 2048 """ + + from re import match as re_match + + res = re_match(r'^\s*(\d+(?:\.\d+)?)\s*([a-zA-Z]+)\s*$', value) + + if not res: + raise ValueError(f"'{value}' is not a valid data amount") + else: + amount = float(res.group(1)) + unit = res.group(2).lower() + + if unit == 'b': + res = amount + elif (unit == 'k') or (unit == 'kb'): + res = amount * 1024 + elif (unit == 'm') or (unit == 'mb'): + res = amount * 1024**2 + elif (unit == 'g') or (unit == 'gb'): + res = amount * 1024**3 + elif (unit == 't') or (unit == 'tb'): + res = amount * 1024**4 + else: + raise ValueError(f"Unsupported data unit '{unit}'") + + # There cannot be fractional bytes, so we convert them to integer. + # However, truncating causes problems with conversion back to human unit, + # so we round instead -- that seems to work well enough. + return round(res) + def get_cfg_group_id(): from grp import getgrnam from vyos.defaults import cfg_group |