XBase::SDBM - SDBM index support for dbf
When developing the XBase.pm/DBD::XBase module, I was trying to support as many
existing variants of file formats as possible. The module thus accepts wide
range of dbf files and their versions from various producers. But with index
files, the task is much, much harder. First, there is little or no
documentation of index files formats, so the development is based on reverse
None if the index formats support is finalized. That made it hard to integrate
them into one consistent API. That is why I decided to write my own index
support, and as I wanted to avoid inventing yet another way of storing records
in pages and similar things, I used SDBM. It comes with Perl, so you already
have it, and it's proven and it works.
Now, SDBM is a module that aims at other task than to do supporting indexes for
a dbf. But equality tests are fast with it and I have creted a structure in
each index file to enable "walk" though the index file.
(c) 2001--2011 Jan Pazdziora.
All rights reserved. This package is free software; you can redistribute it
and/or modify it under the same terms as Perl itself.