Method: GraphQL::Language::Lexer.replace_escaped_characters_in_place

Defined in:

lib/graphql/language/lexer.rb

.replace_escaped_characters_in_place(raw_string) ⇒ Object

Replace any escaped unicode or whitespace with the actual characters To avoid allocating more strings, this modifies the string passed into it

# File 'lib/graphql/language/lexer.rb', line 335

def self.replace_escaped_characters_in_place(raw_string)
  raw_string.gsub!(ESCAPED) do |matched_str|
    if (point_str_1 = $1 || $2)
      codepoint_1 = point_str_1.to_i(16)
      if (codepoint_2 = $3)
        codepoint_2 = codepoint_2.to_i(16)
        if (codepoint_1 >= 0xD800 && codepoint_1 <= 0xDBFF) && # leading surrogate
            (codepoint_2 >= 0xDC00 && codepoint_2 <= 0xDFFF) # trailing surrogate
          # A surrogate pair
          combined = ((codepoint_1 - 0xD800) * 0x400) + (codepoint_2 - 0xDC00) + 0x10000
          [combined].pack('U'.freeze)
        else
          # Two separate code points
          [codepoint_1].pack('U'.freeze) + [codepoint_2].pack('U'.freeze)
        end
      else
        [codepoint_1].pack('U'.freeze)
      end
    else
      ESCAPES_REPLACE[matched_str]
    end
  end
  nil
end