HFLR Ruby gem. Read fixed length record data and hierarchical fixed length record data.
Allows you to read and write files of fixed width records when the file contains one or more than one type of record. Version 1.4 has better support for Ruby 1.9 character encoding, by assuming Latin-1 (ISO-8859-1).
Install with 'gem install hflr'
See the tests and examples bundled with this gem.
Do
gem unpack hflr
to get the source locally. Check the 'test' directory for example code.