Class: String

Inherits:
Object
  • Object
show all
Defined in:
lib/archipelago/oneline.rb

Overview

Adds a few methods to String, some using the inline gem.

Constant Summary collapse

E = 
[0.1, 0.01]
Q = 
[6, 3]
THRESHOLDS = 
[1024]

Instance Method Summary collapse

Instance Method Details

#decode_level ⇒ Object 



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# File 'lib/archipelago/oneline.rb', line 591

def decode_level
  ones = 0
  decode_status[0..(size + @_aux_blocks.size)].split(//).each do |s|
    ones += 1 if s == "1"
  end
  ones.to_f / (size + @_aux_blocks.size).to_f
end

#decode_status ⇒ Object 



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# File 'lib/archipelago/oneline.rb', line 586

def decode_status
  return nil unless @_decode_status
  @_decode_status.unpack("b*").first
end

#oneline_decode(chunk) ⇒ Object 



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# File 'lib/archipelago/oneline.rb', line 558

def oneline_decode(chunk)

  needed_size = chunk[4..7].unpack("L").first
  if size == 0
    concat("\000" * needed_size)
  elsif size != needed_size
    raise "The argument to oneline_decode must be a chunk produced by oneline_encode from the same source"
  end

  @_decode_status ||= "\000" * (((needed_size + get_aux_blocks) / 8) + 1)
  @_known_chunks ||= []
  @_aux_blocks ||= "\000" * get_aux_blocks

  found_new_block = _decode_chunk(chunk, @_decode_status, @_aux_blocks)
  do_decode if found_new_block

  @_known_chunks.unshift(chunk)

  nil while do_decode

  return oneline_done
end

#oneline_done ⇒ Object 



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# File 'lib/archipelago/oneline.rb', line 581

def oneline_done
  return nil unless @_decode_status
  return _oneline_done(@_decode_status)
end

#oneline_encode(chunk_size) ⇒ Object 



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# File 'lib/archipelago/oneline.rb', line 553

def oneline_encode(chunk_size)
  ensure_aux_blocks
  return _get_chunk(chunk_size, @_aux_blocks)
end