A small class for generating and validating Internation Standard Text Codes (ISTC).

Installation

gem install istc

Usage

ISTC.new("0A9200800000007C").valid?
=> true

ISTC.valid?("0A9200800000007C")
=> true

ISTC.valid?("0A9200800000007B")
=> false

ISTC.complete("0A9200800000007")
=> "0A9200800000007C"

ISTC.new("0A9200800000007").to_s
=> "0A9-2008-00000007-C"

Further Reading

• http://en.wikipedia.org/wiki/International_Standard_Text_Code
• http://www.istcinfo.org/
• http://www.ljndawson.com/Wiki/index.php/ISTC

Contributing

Source code is publicly available @ http://github.com/yob/istc. Patches welcome, preferably via a git repo I can pull from.