#
# Copyright 2019 Delphix
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""
Common String and Number formatting functions.
"""

from typing import Union


def size_nicenum(num: Union[int, float]) -> str:
    """
    Return `num` bytes as a human-readable string.
    """
    num = float(num)
    for unit in ['B', 'KB', 'MB', 'GB', 'TB']:
        if num < 1024.0:
            return f"{num:.1f}{unit}"
        num /= 1024.0
    return f"{num:.1f}YB"
