Petrarca

This library Petrarca provides some utility functions to manipulate ISBN numbers:

• Validation
• Calculate check digit
• Mutual conversion of ISBN-13 and ISBN-10
• Hyphenation

All functions support both ISBN-13 and ISBN-10.

All ranges of registration groups and registrants are supported. Those depends on 'RangeMessage.xml' file, downloaded from International ISBN Agency.

NOTE: Updated range files to latest version on June 3, 2023.

Installation

Add this line to your application's Gemfile:

gem 'petrarca'

And then execute:

$ bundle

Or install it yourself as:

$ gem install petrarca

Usage

irb(main):001:0> require 'petrarca'
=> true
irb(main):002:0> Petrarca.valid?("978-4-8156-0644-2")
=> true
irb(main):003:0> Petrarca.calc_check_digit("978-4-8156-0644-2")
=> "2"
irb(main):004:0> Petrarca.to_10("978-4-8156-0644-2")
=> "4-8156-0644-7"
irb(main):005:0> Petrarca.to_13("4-8156-0644-7")
=> "978-4-8156-0644-2"
irb(main):006:0> Petrarca.hyphenate("9784815606442")
=> "978-4-8156-0644-2"

SINCE v0.5.0

Accept Integer as ISBN, only if no - and X including.

irb(main):001:0> require 'petrarca'
=> true
irb(main):002:0> Petrarca.calc_check_digit(978481560644)
=> "2"
irb(main):003:0> Petrarca.to_10(9784815606442)
=> "4-8156-0644-7"
irb(main):004:0> Petrarca.to_13(4815606447)
=> "978-4-8156-0644-2"
irb(main):005:0> Petrarca.hyphenate(9784815606442)
=> "978-4-8156-0644-2"

If the ISBN is hyphenated, consider registration group and registrant in Petrarca.valid?. The second example below has the invalid registrant.

irb(main):006:0> Petrarca.valid?("978-4-8156-0644-2")
=> true
irb(main):007:0> Petrarca.valid?("978-4-815-60644-2")
=> false

License

MIT License

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/takatoh/Petrarca.