class RQRCode::QRBitBuffer

Constants

PAD0
PAD1

Attributes

buffer[R]

Public Class Methods

new(version) click to toggle source
# File lib/rqrcode/qrcode/qr_bit_buffer.rb, line 20
def initialize(version)
  @version = version
  @buffer = []
  @length = 0
end

Public Instance Methods

alphanumeric_encoding_start(length) click to toggle source
# File lib/rqrcode/qrcode/qr_bit_buffer.rb, line 65
def alphanumeric_encoding_start(length)
  
  put( QRMODE[:mode_alpha_numk], 4 )
  put(length, QRUtil.get_length_in_bits(QRMODE[:mode_alpha_numk], @version))
  
end
byte_encoding_start(length) click to toggle source
# File lib/rqrcode/qrcode/qr_bit_buffer.rb, line 58
def byte_encoding_start(length)
  
  put( QRMODE[:mode_8bit_byte], 4 )
  put(length, QRUtil.get_length_in_bits(QRMODE[:mode_8bit_byte], @version))
  
end
end_of_message(max_data_bits) click to toggle source
# File lib/rqrcode/qrcode/qr_bit_buffer.rb, line 92
def end_of_message(max_data_bits)
  put( 0, 4 ) unless get_length_in_bits+4 > max_data_bits
end
get( index ) click to toggle source
# File lib/rqrcode/qrcode/qr_bit_buffer.rb, line 27
def get( index )
  buf_index = (index / 8).floor
  (( (@buffer[buf_index]).rszf(7 - index % 8)) & 1) == 1
end
get_length_in_bits() click to toggle source
# File lib/rqrcode/qrcode/qr_bit_buffer.rb, line 40
def get_length_in_bits
  @length
end
numeric_encoding_start(length) click to toggle source
# File lib/rqrcode/qrcode/qr_bit_buffer.rb, line 72
def numeric_encoding_start(length)
  
  put( QRMODE[:mode_number], 4 )
  put(length, QRUtil.get_length_in_bits(QRMODE[:mode_number], @version))
  
end
pad_until(prefered_size) click to toggle source
# File lib/rqrcode/qrcode/qr_bit_buffer.rb, line 79
def pad_until(prefered_size)
  # Align on byte
  while get_length_in_bits % 8 != 0
    put_bit( false )
  end
  
  # Pad with padding code words
  while get_length_in_bits < prefered_size
    put( QRBitBuffer::PAD0, 8 )
    put( QRBitBuffer::PAD1, 8 ) if get_length_in_bits < prefered_size
  end
end
put( num, length ) click to toggle source
# File lib/rqrcode/qrcode/qr_bit_buffer.rb, line 33
def put( num, length )
  ( 0...length ).each do |i|
    put_bit((((num).rszf(length - i - 1)) & 1) == 1)
  end
end
put_bit( bit ) click to toggle source
# File lib/rqrcode/qrcode/qr_bit_buffer.rb, line 45
def put_bit( bit )
  buf_index = ( @length / 8 ).floor
  if @buffer.size <= buf_index
    @buffer << 0
  end

  if bit
    @buffer[buf_index] |= ((0x80).rszf(@length % 8))
  end

  @length += 1
end