Method: String#hex_to_byte_string

Defined in:
lib/openc3/core_ext/string.rb

#hex_to_byte_string ⇒ String

Converts the String representing a hexadecimal number (i.e. “0xABCD”) to a binary String with the same data (i.e “xABxCD”)

Returns:

  • (String) —

    Binary byte string



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# File 'lib/openc3/core_ext/string.rb', line 255

def hex_to_byte_string
  string = self.dup

  # Remove leading 0x or 0X
  if string[0..1] == '0x' or string[0..1] == '0X'
    string = string[2..-1]
  end

  length = string.length
  length += 1 unless (length % 2) == 0

  array = []
  (length / 2).times do
    # Grab last two characters
    if string.length >= 2
      last_two_characters = string[-2..-1]
      string = string[0..-3]
    else
      last_two_characters = string[0..0]
      string = ''
    end

    int_value = Integer('0x' + last_two_characters)

    array.unshift(int_value)
  end

  array.pack("C*")
end