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## This Source Code Form is subject to the terms of the Mozilla Public
## License, v. 2.0. If a copy of the MPL was not distributed with this
## file, You can obtain one at https://mozilla.org/MPL/2.0/.
##
## Copyright (c) 2007-2022 VMware, Inc. or its affiliates. All rights reserved.
defmodule RabbitMQ.CLI.InformationUnit do
require MapSet
@kilobyte_bytes 1000
@megabyte_bytes @kilobyte_bytes * 1000
@gigabyte_bytes @megabyte_bytes * 1000
@terabyte_bytes @gigabyte_bytes * 1000
def known_units() do
MapSet.new([
"bytes",
"kb",
"kilobytes",
"mb",
"megabytes",
"gb",
"gigabytes",
"tb",
"terabytes"
])
end
def parse(val) do
:rabbit_resource_monitor_misc.parse_information_unit(val)
end
def convert(bytes, "bytes") when is_number(bytes) do
bytes
end
def convert(bytes, unit) when is_number(bytes) do
do_convert(bytes, String.downcase(unit))
end
def convert(:unknown, _) do
:unknown
end
def known_unit?(val) do
MapSet.member?(known_units(), String.downcase(val))
end
defp do_convert(bytes, "kb") do
Float.round(bytes / @kilobyte_bytes, 4)
end
defp do_convert(bytes, "kilobytes"), do: do_convert(bytes, "kb")
defp do_convert(bytes, "mb") do
Float.round(bytes / @megabyte_bytes, 4)
end
defp do_convert(bytes, "megabytes"), do: do_convert(bytes, "mb")
defp do_convert(bytes, "gb") do
Float.round(bytes / @gigabyte_bytes, 4)
end
defp do_convert(bytes, "gigabytes"), do: do_convert(bytes, "gb")
defp do_convert(bytes, "tb") do
Float.round(bytes / @terabyte_bytes, 4)
end
defp do_convert(bytes, "terabytes"), do: do_convert(bytes, "tb")
end
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