class RQRCode::QRBitBuffer
Constants
- PAD0
- PAD1
Attributes
buffer[R]
Public Class Methods
new(version)
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# 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)
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# 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)
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# 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)
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# 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 )
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# 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()
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# File lib/rqrcode/qrcode/qr_bit_buffer.rb, line 40 def get_length_in_bits @length end
numeric_encoding_start(length)
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# 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)
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# 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 )
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# 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 )
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# 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