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  • ripper/tools/generate.rb
  • ripper/tools/preproc.rb

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Public Instance Methods

check_arity(h) click to toggle source
 
               # File ripper/tools/generate.rb, line 122
def check_arity(h)
  invalid = false
  h.each do |event, list|
    unless list.map {|line, arity| arity }.uniq.size == 1
      invalid = true
      locations = list.map {|line, a| "#{line}:#{a}" }.join(', ')
      $stderr.puts "arity crash [event=#{event}]: #{locations}"
    end
  end
  abort if invalid
end
            
generate_eventids1(ids) click to toggle source
 
               # File ripper/tools/generate.rb, line 69
def generate_eventids1(ids)
  buf = ""
  ids.each do |id, arity|
    buf << %Q[static ID ripper_id_#{id};\n]
  end
  buf << %Q[\n]
  buf << %Q[static void\n]
  buf << %Q[ripper_init_eventids1(void)\n]
  buf << %Q[{\n]
  ids.each do |id, arity|
    buf << %Q[    ripper_id_#{id} = rb_intern_const("on_#{id}");\n]
  end
  buf << %Q[}\n]
  buf << %Q[\n]
  buf << %Q[static void\n]
  buf << %Q[ripper_init_eventids1_table(VALUE self)\n]
  buf << %Q[{\n]
  buf << %Q[    VALUE h = rb_hash_new();\n]
  buf << %Q[    ID id;\n]
  buf << %Q[    rb_define_const(self, "PARSER_EVENT_TABLE", h);\n]
  ids.each do |id, arity|
    buf << %Q[    id = rb_intern_const("#{id}");\n]
    buf << %Q[    rb_hash_aset(h, ID2SYM(id), INT2NUM(#{arity}));\n]
  end
  buf << %Q[}\n]
  buf
end
            
generate_eventids2_table(ids) click to toggle source
 
               # File ripper/tools/generate.rb, line 97
def generate_eventids2_table(ids)
  buf = ""
  buf << %Q[static void\n]
  buf << %Q[ripper_init_eventids2_table(VALUE self)\n]
  buf << %Q[{\n]
  buf << %Q[    VALUE h = rb_hash_new();\n]
  buf << %Q[    ID id;\n]
  buf << %Q[    rb_define_const(self, "SCANNER_EVENT_TABLE", h);\n]
  ids.each do |id|
    buf << %Q[    id = rb_intern_const("#{id}");\n]
    buf << %Q[    rb_hash_aset(h, ID2SYM(id), INT2NUM(1));\n]
  end
  buf << %Q[}\n]
  buf
end
            
grammar(f, out) click to toggle source
 
               # File ripper/tools/preproc.rb, line 63
def grammar(f, out)
  while line = f.gets
    case line
    when %r</\*%%%\*/>
      out << '#if 0' << $/
    when %r</\*%c%\*/>
      out << '/*' << $/
    when %r</\*%c>
      out << '*/' << $/
    when %r</\*%>
      out << '#endif' << $/
    when %r<%\*/>
      out << $/
    when /\A%%/
      out << '%%' << $/
      return
    else
      out << line
    end
  end
end
            
main() click to toggle source
 
               # File ripper/tools/generate.rb, line 5
def main
  mode = nil
  ids1src = nil
  ids2src = nil
  output = nil

  parser = @parser = OptionParser.new
  parser.banner = "Usage: #{File.basename($0)} --mode=MODE [--ids1src=PATH] [--ids2src=PATH] [--output=PATH]"
  parser.on('--mode=MODE', 'check, eventids1, or eventids2table.') {|m|
    mode = m
  }
  parser.on('--ids1src=PATH', 'A source file of event-IDs 1 (parse.y).') {|path|
    ids1src = path
  }
  parser.on('--ids2src=PATH', 'A source file of event-IDs 2 (eventids2.c).') {|path|
    ids2src = path
  }
  parser.on('--output=PATH', 'An output file.') {|path|
    output = path
  }
  parser.on('--help', 'Prints this message and quit.') {
    puts parser.help
    exit true
  }
  begin
    parser.parse!
  rescue OptionParser::ParseError => err
    usage err.message
  end
  usage 'no mode given' unless mode
  case mode
  when 'check'
    usage 'no --ids1src' unless ids1src
    usage 'no --ids2src' unless ids2src
    h = read_ids1_with_locations(ids1src)
    check_arity h
    ids2 = read_ids2(ids2src)
    common = h.keys & ids2
    unless common.empty?
      abort "event crash: #{common.join(' ')}"
    end
    exit 0
  when 'eventids1'
    usage 'no --ids1src' unless ids1src
    result = generate_eventids1(read_ids1(ids1src))
  when 'eventids2table'
    usage 'no --ids2src' unless ids2src
    result = generate_eventids2_table(read_ids2(ids2src))
  end
  if output
    File.open(output, 'w') {|f|
      f.write result
    }
  else
    puts result
  end
end
            
prelude(f, out) click to toggle source
 
               # File ripper/tools/preproc.rb, line 41
def prelude(f, out)
  while line = f.gets
    case line
    when %r</\*%%%\*/>
      out << '/*' << $/
    when %r</\*%>
      out << '*/' << $/
    when %r<%\*/>
      out << $/
    when /\A%%/
      out << '%%' << $/
      return
    when /\A%token/
      out << line.sub(/<\w+>/, '<val>')
    when /\A%type/
      out << line.sub(/<\w+>/, '<val>')
    else
      out << line
    end
  end
end
            
read_ids1(path) click to toggle source
 
               # File ripper/tools/generate.rb, line 113
def read_ids1(path)
  strip_locations(read_ids1_with_locations(path))
end
            
read_ids1_with_locations(path) click to toggle source
 
               # File ripper/tools/generate.rb, line 134
def read_ids1_with_locations(path)
  h = {}
  File.open(path) {|f|
    f.each do |line|
      next if /\A\#\s*define\s+s?dispatch/ =~ line
      next if /ripper_dispatch/ =~ line
      line.scan(/dispatch(\d)\((\w+)/) do |arity, event|
        (h[event] ||= []).push [f.lineno, arity.to_i]
      end
    end
  }
  h
end
            
read_ids2(path) click to toggle source
 
               # File ripper/tools/generate.rb, line 148
def read_ids2(path)
  File.open(path) {|f|
    return f.read.scan(/ripper_id_(\w+)/).flatten.uniq.sort
  }
end
            
strip_locations(h) click to toggle source
 
               # File ripper/tools/generate.rb, line 117
def strip_locations(h)
  h.map {|event, list| [event, list.first[1]] }       .sort_by {|event, arity| event.to_s }
end
            
usage(msg) click to toggle source
 
               # File ripper/tools/generate.rb, line 63
def usage(msg)
  $stderr.puts msg
  $stderr.puts @parser.help
  exit false
end
            
usercode(f, out) click to toggle source
 
               # File ripper/tools/preproc.rb, line 85
def usercode(f, out)
  while line = f.gets
    out << line
  end
end