Class: BitStream::ArrayProxy

Inherits:
Object
  • Object
show all
Includes:
RandomAccessible
Defined in:
lib/bitstream.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(instance) ⇒ ArrayProxy

Returns a new instance of ArrayProxy.



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# File 'lib/bitstream.rb', line 36

def initialize(instance)
  @fields = []
  @values = []
  @updated = []
  @instance = instance
  @size = 0
end

Instance Attribute Details

#size ⇒ Object (readonly)

Returns the value of attribute size.



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# File 'lib/bitstream.rb', line 79

def size
  @size
end

Instance Method Details

#add_field(field) ⇒ Object 



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# File 'lib/bitstream.rb', line 44

def add_field(field)
  @fields << field
  @size += 1
end

#get_field(pos) ⇒ Object 



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# File 'lib/bitstream.rb', line 49

def get_field(pos)
  @fields[pos]
end

#read_access(pos) ⇒ Object 



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# File 'lib/bitstream.rb', line 53

def read_access(pos)
  unless @updated[pos]
    field = @fields[pos]
    @values[pos] = field.value
    @fields[pos] = nil
    @updated[pos] = true
  end
  return @values[pos]
end

#shrink(n) ⇒ Object 



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# File 'lib/bitstream.rb', line 69

def shrink(n)
  @fields.pop(n)
  @size -= n
  dif = @values.size - @size
  if dif > 0
    @values.pop(dif)
    @updated.pop(dif)
  end
end

#write_access(pos, val) ⇒ Object 



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# File 'lib/bitstream.rb', line 63

def write_access(pos, val)
  @fields[pos] = nil
  @values[pos] = val
  @updated[pos] = true
end