Posted By: Dion Mendel
Date: 2007-03-17 23:07
Summary: BinData 0.5.0
Project: BinData

Do you ever find yourself writing code like this?

io =
len ="v")
name =
width, height ="VV")
puts "Rectangle #{name} is #{width} x #{height}"

It's ugly, violates DRY and feels like you're writing Perl, not Ruby.

BinData is a declarative way of reading and writing structured binary data. Here's how you'd write the above using BinData.

class Rectangle < BinData::Struct
. uint16le :len
. string :name, :initial_length => :len
. uint32le :width
. uint32le :height

io =
r =
puts "Rectangle #{} is #{r.width} x #{r.height}"

BinData supports signed/unsigned integers, strings, null terminated strings, arrays, choices and user defined structures. This initial release has been heavily tested, and is being actively developed.

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