Module: Unibits

Defined in:
lib/unibits.rb,
lib/unibits/version.rb

Constant Summary collapse

SUPPORTED_ENCODINGS = 
[
  'UTF-8',
  'UTF-16LE',
  'UTF-16BE',
  'UTF-32LE',
  'UTF-32BE',
  'ASCII-8BIT',
  'US-ASCII',
].freeze
VERSION = 
"1.0.0".freeze

Class Method Summary collapse

Class Method Details

.determine_terminal_cols ⇒ Object 



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# File 'lib/unibits.rb', line 169

def self.determine_terminal_cols
  STDIN.winsize[1] || 80
rescue Errno::ENOTTY
  return 80
end

.of(string, encoding: nil, convert: nil, stats: true) ⇒ Object 



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# File 'lib/unibits.rb', line 18

def self.of(string, encoding: nil, convert: nil, stats: true)
  if !string || string.empty?
    raise ArgumentError, "no data given to unibits"
  end

  string = string.dup.force_encoding(encoding) if encoding
  string = string.encode(convert) if convert

  case string.encoding.name
  when *SUPPORTED_ENCODINGS
    unless string.valid_encoding?
      raise ArgumentError, "the data given is not valid #{string.encoding.name}"
    end

    puts stats(string) if stats
    puts visualize(string)
  when 'UTF-16', 'UTF-32'
    raise ArgumentError, "unibits only supports #{string.encoding.name} with specified endianess, please use #{string.encoding.name}LE or #{string.encoding.name}BE"
  else
    raise ArgumentError, "unibits does not support strings of encoding #{string.encoding}"
  end
end

.random_color ⇒ Object 



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# File 'lib/unibits.rb', line 154

def self.random_color
  "%.2x%.2x%.2x" %[rand(90) + 60, rand(90) + 60, rand(90) + 60]
end

.stats(string) ⇒ Object 



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# File 'lib/unibits.rb', line 41

def self.stats(string)
  "\n  " \
  "#{Paint[string.encoding.name, :bold]} (" \
  "#{string.bytesize}/" \
  "#{string.size}/" \
  "#{string.scan(Regexp.compile('\X'.encode(string.encoding))).size}/" \
  "#{Unicode::DisplayWidth.of(string)})"
end

.symbolify(char) ⇒ Object 



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# File 'lib/unibits.rb', line 158

def self.symbolify(char)
  return char.inspect unless char.encoding.name[0, 3] == "UTF"
  char
    .tr("\x00-\x1F".encode(char.encoding), "\u{2400}-\u{241F}".encode(char.encoding))
    .gsub(
      Regexp.compile('[\p{Space}᠎​‌‍⁠]'.encode(char.encoding)),
      ']\0['.encode(char.encoding)
    )
    .encode('UTF-8')
end

.visualize(string) ⇒ Object 



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# File 'lib/unibits.rb', line 50

def self.visualize(string)
  cols = determine_terminal_cols

  cp_buffer  = ["  "]
  enc_buffer = ["  "]
  hex_buffer = ["  "]
  bin_buffer = ["  "]
  separator  = ["  "]

  puts
  string.each_char{ |char|
    current_color = random_color

    char.each_byte.with_index{ |byte, index|
      if Paint.unpaint(hex_buffer[-1]).bytesize > cols - 12
        cp_buffer  << "  "
        enc_buffer << "  "
        hex_buffer << "  "
        bin_buffer << "  "
        separator  << "  "
      end

      if index == 0
        cp_buffer[-1] << Paint[
          ("U+%04X" % char.ord).ljust(10), current_color, :bold
        ]

        symbolified_char = symbolify(char)
        padding = 10 - Unicode::DisplayWidth.of(symbolified_char)

        enc_buffer[-1] << Paint[
          symbolified_char, current_color
        ]
        enc_buffer[-1] << " " * padding if padding > 0
      else
        cp_buffer[-1]  << " " * 10
        enc_buffer[-1] << " " * 10
      end

      hex_buffer[-1] << Paint[
        ("%02X" % byte).ljust(10, " "), current_color
      ]

      bin_byte_complete = byte.to_s(2).rjust(8, "0")

      case string.encoding.name
      when 'US-ASCII'
        bin_byte_1 = bin_byte_complete[0...1]
        bin_byte_2 = bin_byte_complete[1...8]
      when 'ASCII-8BIT'
        bin_byte_1 = ""
        bin_byte_2 = bin_byte_complete
      when 'UTF-8'
        if index == 0
          if bin_byte_complete =~ /^(0|1{2,4}0)([01]+)$/
            bin_byte_1 = $1
            bin_byte_2 = $2
          else
            bin_byte_1 = ""
            bin_byte_2 = bin_byte_complete
          end
        else
          bin_byte_1 = bin_byte_complete[0...2]
          bin_byte_2 = bin_byte_complete[2...8]
        end
      when 'UTF-16LE'
        if char.ord <= 0xFFFF || index == 0 || index == 2
          bin_byte_1 = ""
          bin_byte_2 = bin_byte_complete
        else
          bin_byte_complete =~ /^(11011[01])([01]+)$/
          bin_byte_1 = $1
          bin_byte_2 = $2
        end
      when 'UTF-16BE'
        if char.ord <= 0xFFFF || index == 1 || index == 3
          bin_byte_1 = ""
          bin_byte_2 = bin_byte_complete
        else
          bin_byte_complete =~ /^(11011[01])([01]+)$/
          bin_byte_1 = $1
          bin_byte_2 = $2
        end
      when 'UTF-32LE', 'UTF-32BE'
        bin_byte_1 = ""
        bin_byte_2 = bin_byte_complete
      end
      bin_buffer[-1] << Paint[
        bin_byte_1, current_color
      ] unless !bin_byte_1 || bin_byte_1.empty?
      bin_buffer[-1] << Paint[
        bin_byte_2, current_color, :underline
      ] unless !bin_byte_2 || bin_byte_2.empty?
      bin_buffer[-1] << "  "
    }
  }

  if string.encoding.name[0, 3] == "UTF"
    enc_buffer.zip(cp_buffer, hex_buffer, bin_buffer, separator).flatten.join("\n")
  else
    enc_buffer.zip(hex_buffer, bin_buffer, separator).flatten.join("\n")
  end
end