Module: LexerKit::CLI::Commands::Info

Defined in:
lib/lexer_kit/cli/commands.rb

Overview

Show lexer information

Class Method Summary collapse

Class Method Details

.format_size(bytes) ⇒ Object 



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# File 'lib/lexer_kit/cli/commands.rb', line 139

def self.format_size(bytes)
  if bytes < 1024
    "#{bytes} bytes"
  elsif bytes < 1024 * 1024
    "#{(bytes / 1024.0).round(1)} KB"
  else
    "#{(bytes / 1024.0 / 1024.0).round(2)} MB"
  end
end

.run(argv) ⇒ Object 



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# File 'lib/lexer_kit/cli/commands.rb', line 86

def self.run(argv)
  parser = OptionParser.new do |opts|
    opts.banner = "Usage: lexer_kit info <file>"

    opts.on("-h", "--help", "Show this help") do
      puts opts
      return 0
    end
  end

  parser.parse!(argv)

  if argv.empty?
    warn "error: No input file specified"
    warn parser.banner
    return 1
  end

  path = argv.shift
  lexer = CLI.load_lexer(path)

  puts "LexerKit Compiled Program"
  puts "  Version:      #{lexer.version}"
  puts "  Native:       #{LexerKit.native? ? 'enabled' : 'disabled'}"
  puts

  puts "Tokens (#{lexer.tokens.size}):"
  lexer.tokens.each_with_index do |name, id|
    puts "  #{id.to_s.rjust(3)}: #{name}"
  end
  puts

  puts "Modes (#{lexer.modes.size}):"
  lexer.modes.each do |name|
    offset = lexer.mode_offset(name)
    puts "  - #{name} (offset: #{offset})"
  end
  puts

  puts "Statistics:"
  puts "  Instructions: #{lexer.instructions.size}"
  puts "  DFA tables:   #{lexer.dfa_tables.size}"
  puts "  Jump tables:  #{lexer.jump_tables.size}"
  puts "  Keywords:     #{lexer.keyword_tables.size}"
  puts "  Constants:    #{lexer.constant_pool.size}"

  # Calculate binary size
  binary_size = lexer.to_binary.bytesize
  puts "  Binary size:  #{format_size(binary_size)}"

  0
end