Class: RQRCode::QRBitBuffer

Inherits:
Object
  • Object
show all
Defined in:
lib/rqrcode/qrcode/qr_bit_buffer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ QRBitBuffer

Returns a new instance of QRBitBuffer.



17
18
19
20
 
# File 'lib/rqrcode/qrcode/qr_bit_buffer.rb', line 17

def initialize
  @buffer = []
  @length = 0
end

Instance Attribute Details

#buffer ⇒ Object (readonly)

Returns the value of attribute buffer.



15
16
17
 
# File 'lib/rqrcode/qrcode/qr_bit_buffer.rb', line 15

def buffer
  @buffer
end

Instance Method Details

#get(index) ⇒ Object 



23
24
25
26
 
# File 'lib/rqrcode/qrcode/qr_bit_buffer.rb', line 23

def get( index )
  buf_index = (index / 8).floor
  (( (@buffer[buf_index]).rszf(7 - index % 8)) & 1) == 1
end

#get_length_in_bits ⇒ Object 



36
37
38
 
# File 'lib/rqrcode/qrcode/qr_bit_buffer.rb', line 36

def get_length_in_bits
  @length
end

#put(num, length) ⇒ Object 



29
30
31
32
33
 
# File 'lib/rqrcode/qrcode/qr_bit_buffer.rb', line 29

def put( num, length )
  ( 0...length ).each do |i|
    put_bit((((num).rszf(length - i - 1)) & 1) == 1)
  end
end

#put_bit(bit) ⇒ Object 



41
42
43
44
45
46
47
48
49
50
51
52
 
# File 'lib/rqrcode/qrcode/qr_bit_buffer.rb', line 41

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