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Versions: 9
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Stored size: 1.69 KB
Contents
# The Packable mixin itself...
require 'stringio'
module Packable
def self.included(base) #:nodoc:
base.class_eval do
class << self
include PackersClassMethod
include ClassMethods
end
end
end
# +options+ can be a Hash, a shortcut (Symbol) or a String (old-style)
def pack(options = :default)
return [self].pack(options) if options.is_a? String
(StringIO.new.packed << [self, options]).string
end
module PackersClassMethod
# Returns or yields a the Packers.for(class)
# Normal use is packers.set ...
# (see docs or Packers::set for usage)
def packers
yield packers if block_given?
Packers.for(self)
end
end
module ClassMethods
def unpack(s, options = :default)
return s.unpack(options).first if options.is_a? String
StringIO.new(s).packed.read(self, options)
end
# Default +read_packed+ calls either the instance method <tt>read_packed</tt> or the
# class method +unpack_string+. Choose:
# * define a class method +read_packed+ that returns the newly read object
# * define an instance method +read_packed+ which reads the io into +self+
# * define a class method +unpack_string+ that reads and returns an object from the string. In this case, options[:bytes] should be specified!
def read_packed(io, options)
if method_defined? :read_packed
mandatory = instance_method(:initialize).arity
mandatory = -1-mandatory if mandatory < 0
obj = new(*[nil]*mandatory)
obj.read_packed(io, options)
obj
else
len = options[:bytes]
s = len ? io.read(len) : io.read
unpack_string(s, options)
end
end
end
end
Version data entries
9 entries across 9 versions & 2 rubygems