git.oblomov.eu Git - ohcount/blob - ext/ohcount_native/ragel_parsers/construct_embedded.rb

   1 =begin
   2   construct_embedded written by Mitchell Foral. mitchell<att>caladbolg<dott>net.
   3 =end
   4
   5 def has_embedded?(parser_file)
   6   return IO.read(parser_file).include?('#EMBED')
   7 end
   8
   9 def construct_language(parser_file)
  10   parser_text = IO.read(parser_file).gsub(/#EMBED\([\w_]+\)/) do |elang|
  11     lang = elang.scan(/^#EMBED\(([\w_]+)\)/)[0][0]
  12     eparser_file = lang + '.rl'
  13     if File.exists?(eparser_file)
  14       eparser = IO.read(eparser_file)
  15       ragel = eparser.scan(/%%\{(.+?)\}%%/m)[0][0]
  16       # eliminate machine definition, writes, and includes
  17       ragel.gsub!(/^\s*machine[^;]+;\s+write[^;]+;\s+include[^;]+;\s+/, '')
  18       "}%%\n%%{\n#{ragel}"
  19     else
  20       ''
  21     end
  22   end
  23   f = File.new(parser_file + '.tmp', 'w')
  24   f.write(parser_text)
  25   f.close
  26 end