Class: CBOR::Dumper

Inherits:
Object
  • Object
show all
Includes:
Consts
Defined in:
lib/cbor/dumper.rb

Constant Summary collapse

@@registered_classes = 
{}

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.register_class(klass, tag, &block) ⇒ Object 



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# File 'lib/cbor/dumper.rb', line 6

def self.register_class(klass, tag, &block)
  @@registered_classes[klass] = {
    tag: tag,
    block: block
  }
end

Instance Method Details

#dump(val) ⇒ Object 



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# File 'lib/cbor/dumper.rb', line 13

def dump(val)
  case val
  when nil
    dump_simple(Simple::NULL)
  when TrueClass
    dump_simple(Simple::TRUE)
  when FalseClass
    dump_simple(Simple::FALSE)
  when Fixnum, Bignum
    if val < 0
      dump_uint(Major::NEGINT, -val-1)
    else
      dump_uint(Major::UINT, val)
    end
  when Float
    dump_simple(Simple::FLOAT64) + [val].pack("G")
  when String, Symbol
    s = val.to_s.dup.force_encoding(Encoding::UTF_8)
    dump_uint(s.valid_encoding? ? Major::TEXTSTRING : Major::BYTESTRING, s.bytesize) + s.b
  when Array
    dump_uint(Major::ARRAY, val.count) + val.map{|e| dump(e)}.join
  when Hash
    dump_uint(Major::MAP, val.count) + val.map{|k, v| dump(k.to_s) + dump(v)}.join
  else
    klass = @@registered_classes.keys.find {|k| val.is_a? k}
    if klass
      h = @@registered_classes[klass]
      dump_uint(Major::TAG, h[:tag]) + dump(h[:block].call(val))
    else
      raise CBOR::CborError.new("dumping not supported for objects of type #{val.class} (#{val.inspect})")
    end
  end
end