Module: Packable::Extensions::Integer

Defined in:
lib/packable/extensions/integer.rb

Overview

:nodoc:

Defined Under Namespace

Modules: ClassMethods

Constant Summary collapse

NEEDS_REVERSAL = 
Hash.new{|h, endian| raise ArgumentError, "Endian #{endian} is not valid. It must be one of #{h.keys.join(', ')}"}.
merge!(:little => true, :big => false, :network => false, :native => "*\x00\x00\x00".unpack('L').first == 42).freeze

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/packable/extensions/integer.rb', line 7

def self.included(base)
  base.class_eval do
    include Packable
    extend ClassMethods
    packers do |p|
      p.set :merge_all      , :bytes=>4, :signed=>true, :endian=>:big
      p.set :default        , :long
      p.set :long           , {}
      p.set :short          , :bytes=>2
      p.set :char           , :bytes=>1, :signed=>false
      p.set :byte           , :bytes=>1
      p.set :unsigned_long  , :bytes=>4, :signed=>false
      p.set :unsigned_short , :bytes=>2, :signed=>false
    end
  end
end

Instance Method Details

#write_packed(io, options) ⇒ Object 



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# File 'lib/packable/extensions/integer.rb', line 24

def write_packed(io, options)
  val = self
  chars = (0...options[:bytes]).collect do
    byte = val & 0xFF
    val >>= 8
    byte.chr
  end
  chars.reverse! unless NEEDS_REVERSAL[options[:endian]]
  io << chars.join
end