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Current Path: /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/digest-crc-0.4.1/lib/digest

opt / td-agent / embedded / lib / ruby / gems / 2.4.0 / gems / digest-crc-0.4.1 / lib / digest /

📁 ..
📄 crc.rb(2.06 KB)
📄 crc1.rb(521 B)
📄 crc16.rb(3.01 KB)
📄 crc16_ccitt.rb(2.73 KB)
📄 crc16_dnp.rb(2.89 KB)
📄 crc16_modbus.rb(2.45 KB)
📄 crc16_qt.rb(1.08 KB)
📄 crc16_usb.rb(168 B)
📄 crc16_xmodem.rb(2.71 KB)
📄 crc16_zmodem.rb(2.7 KB)
📄 crc24.rb(3.57 KB)
📄 crc32.rb(4.33 KB)
📄 crc32_mpeg.rb(3.84 KB)
📄 crc32c.rb(3.6 KB)
📄 crc5.rb(2.31 KB)
📄 crc64.rb(6.55 KB)
📄 crc8.rb(2.33 KB)
📄 crc8_1wire.rb(1.83 KB)

Editing: crc16_qt.rb

require 'digest/crc16_ccitt'

module Digest
  #
  # Implements the CRC16_CCITT algorithm used in QT algorithms.
  #
  # @author Matthew Bednarski
  #
  class CRC16QT < CRC16CCITT

FINAL_XOR = 0xffff

REVERSE_CRC_RESULT = true

REVERSE_DATA = true

# Updates the CRC16 checksum.
    #
    # @param [String] data
    #   The data to update the checksum with.
    #
    def update(data)
      data.each_byte do |b|
        b = revert_byte(b) if REVERSE_DATA
        @crc = ((@table[((@crc >> 8) ^ b) & 0xff] ^ (@crc << 8)) & 0xffff)
      end

return self
    end

def checksum
      crc = @crc + 0
      crc ^= FINAL_XOR      if FINAL_XOR
      crc = revert_bits crc if REVERSE_CRC_RESULT
      return crc
    end

protected

def revert_bits(cc)
      ob = 0
      b  = (1 << 15)

16.times do |t|
        ob |= (1 << t) if (cc & b) != 0
        b >>= 1
      end

return ob
    end

def revert_byte(cc)
      ob = 0
      b  = (1 << 7)

8.times do |t|
        ob |= (1 << t) if (cc & b) != 0
        b >>= 1
      end

return ob
    end

end
end

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Editing: crc16_qt.rb

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