def number_to_human_size(number, options = {})
      options.symbolize_keys!

      number = begin
        Float(number)
      rescue ArgumentError, TypeError
        if options[:raise]
          raise # InvalidNumberError, number
        else
          return number
        end
      end

      defaults = ::I18n.translate(:'number.format', :locale => options[:locale], :default => {})
      human    = ::I18n.translate(:'number.human.format', :locale => options[:locale], :default => {})
      defaults = defaults.merge(human)

      options = options.reverse_merge(defaults)
      #for backwards compatibility with those that didn't add strip_insignificant_zeros to their locale files
      options[:strip_insignificant_zeros] = true if not options.key?(:strip_insignificant_zeros)

      storage_units_format = ::I18n.translate(:'number.human.storage_units.format', :locale => options[:locale], :raise => true)

      base = options[:prefix] == :si ? 1000 : 1024

      if number.to_i < base
        unit = ::I18n.translate(:'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).html_safe
      else
        max_exp  = STORAGE_UNITS.size - 1
        exponent = (Math.log(number) / Math.log(base)).to_i # Convert to base
        exponent = max_exp if exponent > max_exp # we need this to avoid overflow for the highest unit
        number  /= base ** exponent

        unit_key = STORAGE_UNITS[exponent]
        unit = ::I18n.translate(:"number.human.storage_units.units.#{unit_key}", :locale => options[:locale], :count => number, :raise => true)

        formatted_number = number_with_precision(number, options)
        storage_units_format.gsub(/%n/, formatted_number).gsub(/%u/, unit).html_safe
      end
    end
def number_to_human_size(number, options = {})
      options.symbolize_keys!

      number = begin
        Float(number)
      rescue ArgumentError, TypeError
        if options[:raise]
          raise # InvalidNumberError, number
        else
          return number
        end
      end

      defaults = ::I18n.translate(:'number.format', :locale => options[:locale], :default => {})
      human    = ::I18n.translate(:'number.human.format', :locale => options[:locale], :default => {})
      defaults = defaults.merge(human)

      options = options.reverse_merge(defaults)
      #for backwards compatibility with those that didn't add strip_insignificant_zeros to their locale files
      options[:strip_insignificant_zeros] = true if not options.key?(:strip_insignificant_zeros)

      storage_units_format = ::I18n.translate(:'number.human.storage_units.format', :locale => options[:locale], :raise => true)

      base = options[:prefix] == :si ? 1000 : 1024

      if number.to_i < base
        unit = ::I18n.translate(:'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).html_safe
      else
        max_exp  = STORAGE_UNITS.size - 1
        exponent = (Math.log(number) / Math.log(base)).to_i # Convert to base
        exponent = max_exp if exponent > max_exp # we need this to avoid overflow for the highest unit
        number  /= base ** exponent

        unit_key = STORAGE_UNITS[exponent]
        unit = ::I18n.translate(:"number.human.storage_units.units.#{unit_key}", :locale => options[:locale], :count => number, :raise => true)

        formatted_number = number_with_precision(number, options)
        storage_units_format.gsub(/%n/, formatted_number).gsub(/%u/, unit).html_safe
      end
    end
TODO: use NumberHelper from 'activesupport ~> 4.0',
 at the moment it is incompatible with mongoid,