def number_to_human_size(number, *args)
return nil if number.nil?
options = args.extract_options!
options.symbolize_keys!
defaults = I18n.translate('number.format''number.format', :locale => options[:locale], :raise => true) rescue {}
human = I18n.translate('number.human.format''number.human.format', :locale => options[:locale], :raise => true) rescue {}
defaults = defaults.merge(human)
unless args.empty?
ActiveSupport::Deprecation.warn('number_to_human_size takes an option hash ' +
'instead of a separate precision argument.', caller)
precision = args[0] || defaults[:precision]
end
precision ||= (options[:precision] || defaults[:precision])
separator ||= (options[:separator] || defaults[:separator])
delimiter ||= (options[:delimiter] || defaults[:delimiter])
storage_units_format = I18n.translate('number.human.storage_units.format''number.human.storage_units.format', :locale => options[:locale], :raise => true)
if number.to_i < 1024
unit = I18n.translate('number.human.storage_units.units.byte''number.human.storage_units.units.byte', :locale => options[:locale], :count => number.to_i, :raise => true)
storage_units_format.gsub(/%n/, number.to_i.to_s).gsub(/%u/, unit)
else
max_exp = STORAGE_UNITS.size - 1
number = Float(number)
exponent = (Math.log(number) / Math.log(1024)).to_i
exponent = max_exp if exponent > max_exp
number /= 1024 ** exponent
unit_key = STORAGE_UNITS[exponent]
unit = I18n.translate("number.human.storage_units.units.#{unit_key}""number.human.storage_units.units.#{unit_key}", :locale => options[:locale], :count => number, :raise => true)
begin
escaped_separator = Regexp.escape(separator)
formatted_number = number_with_precision(number,
:precision => precision,
:separator => separator,
:delimiter => delimiter
).sub(/(#{escaped_separator})(\d*[1-9])?0+\z/, '\1\2').sub(/#{escaped_separator}\z/, '')
storage_units_format.gsub(/%n/, formatted_number).gsub(/%u/, unit)
rescue
number
end
end
end