Class: Codec::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/codec/base.rb

Direct Known Subclasses

Binary, Numbin, Numstr, String

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id, length) ⇒ Base

Returns a new instance of Base.



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# File 'lib/codec/base.rb', line 4

def initialize(id,length)
    @length = length.to_i
    @id = id
end

Instance Attribute Details

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/codec/base.rb', line 3

def id
  @id
end

Instance Method Details

#add_subparser(id_field, parser) ⇒ Object 



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# File 'lib/codec/base.rb', line 39

def add_subparser(id_field,parser)
 if parser.nil?
   raise InitializeException, "Invalid codec reference in subparser #{id_field} for codec #{@id}"
 end
  if @subParsers.kind_of? Hash
    @subParsers[id_field] = parser 
  end
end

#build_field ⇒ Object 



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# File 'lib/codec/base.rb', line 9

def build_field
  f = Field.new(@id)
  f.set_value(@data)
  return f
end

#decode(buf) ⇒ Object 



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# File 'lib/codec/base.rb', line 20

def decode(buf)
  init_data(buf,@length)
  return build_field,@remain
end

#decode_with_length(buf, length) ⇒ Object 



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# File 'lib/codec/base.rb', line 15

def decode_with_length(buf,length)
  init_data(buf,length)
  return build_field,@remain
end

#get_sub_parsers ⇒ Object 



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# File 'lib/codec/base.rb', line 48

def get_sub_parsers
  return @subParsers
end

#init_data(buf, length) ⇒ Object 



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# File 'lib/codec/base.rb', line 25

def init_data(buf,length)
 length = 0 if length.nil?
  if(length != 0)
   if buf.length < length
     raise BufferUnderflow, "Not enough data for parsing #{@id} (#{length}/#{buf.length})"
   end
    @data = buf[0,length]
    @remain = buf[length,buf.length]
  else
    @data = buf
    @remain = ""
  end
end