Class: Humane::SizeFormatter

Inherits:
Object
  • Object
show all
Defined in:
lib/humane/size_formatter.rb

Overview

Formats byte counts the way Finder does: 1000-based math, capitalized unit labels.

Constant Summary collapse

UNITS = 
%w[B KB MB GB TB PB EB].freeze

Instance Method Summary collapse

Instance Method Details

#string(from_byte_count:) ⇒ Object

Returns from_byte_count as a Finder-style human-readable string.



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# File 'lib/humane/size_formatter.rb', line 9

def string(from_byte_count:)
  return "#{from_byte_count} B" if from_byte_count < 1000

  exponent = [(Math.log(from_byte_count) / Math.log(1000)).to_i, UNITS.size - 1].min
  rounded = (from_byte_count / (1000.0**exponent) * 10).round / 10.0

  if rounded < 10
    format("%.1f %s", rounded, UNITS[exponent])
  else
    format("%.0f %s", rounded, UNITS[exponent])
  end
end