class Facter::Util::Facts::UnitConverter
Public Class Methods
bytes_to_human_readable(bytes)
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# File lib/facter/util/facts/unit_converter.rb, line 25 def bytes_to_human_readable(bytes) return unless bytes return bytes.to_s + ' bytes' if bytes < 1024 number, multiple = determine_exponent(bytes) "#{pad_number(number)} #{multiple}" end
bytes_to_mb(value_in_bytes)
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# File lib/facter/util/facts/unit_converter.rb, line 8 def bytes_to_mb(value_in_bytes) return unless value_in_bytes value_in_bytes = value_in_bytes.to_i (value_in_bytes / (1024.0 * 1024.0)) end
hertz_to_human_readable(speed)
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# File lib/facter/util/facts/unit_converter.rb, line 16 def hertz_to_human_readable(speed) speed = speed.to_i return if !speed || speed.zero? validated_speed, metric_prefix = determine_metric_prefix(speed) format('%<displayed_speed>.2f', displayed_speed: validated_speed.round(2)).to_s + ' ' + metric_prefix + 'Hz' end
Private Class Methods
determine_exponent(bytes)
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# File lib/facter/util/facts/unit_converter.rb, line 42 def determine_exponent(bytes) prefix = %w[KiB MiB GiB TiB PiB EiB] exp = (Math.log2(bytes) / 10.0).floor converted_number = (100.0 * (bytes / 1024.0**exp)).round / 100.0 if (converted_number - 1024.0).abs < Float::EPSILON exp += 1 converted_number = 1.00 end multiple = prefix[exp - 1] || 'bytes' converted_number = bytes if multiple == 'bytes' [converted_number, multiple] end
determine_metric_prefix(num)
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# File lib/facter/util/facts/unit_converter.rb, line 57 def determine_metric_prefix(num) metric_prefix = { 0 => '', 3 => 'k', 6 => 'M', 9 => 'G', 12 => 'T' } power = Math.log10(num).floor display_exponent = power - power % 3 coefficient = power.zero? ? num.to_f : num.fdiv(10**display_exponent) [coefficient, metric_prefix[display_exponent]] end
pad_number(number)
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# File lib/facter/util/facts/unit_converter.rb, line 36 def pad_number(number) number = number.to_s number << '0' if number.split('.').last.length == 1 number end