Module: HumanReadable

Defined in:
lib/human_readable.rb

Overview

Copyright © 2009 Matteo Sasso

This file is part of durb.

durb is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

durb is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with durb. If not, see <www.gnu.org/licenses/>.

Constant Summary collapse

SUFFIXES = 
[' ', 'k', 'm', 'g', 't', 'p']

Instance Method Summary collapse

Instance Method Details

#size_to_text(size) ⇒ Object 



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# File 'lib/human_readable.rb', line 29

def size_to_text(size)
  exp = 0
  return size.to_s if size < 10000
  while size > 999
    size /= 1024.0
    exp += 1
  end

  if size < 10
    "%.1f%s" % [size, SUFFIXES[exp]]
  else
    "%d%s" % [size.round, SUFFIXES[exp]]
  end
end

#text_to_size(text) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/human_readable.rb', line 21

def text_to_size(text)
  number, multiplier = text.match(/^(\d+)(\D)?$/)[1..-1]
  exp = multiplier ? SUFFIXES.index(multiplier) : 0
  raise ArgumentError, "Unknown suffix: %s" % multiplier if not exp

  return number.to_i * 1024**exp
end