Module: LexerKit::CLI::Commands::Disasm

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

Overview

Disassemble a .lkt1 file

Class Method Summary collapse

Class Method Details

.run(argv) ⇒ Object 



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# File 'lib/lexer_kit/cli/commands.rb', line 273

def self.run(argv)
  options = { dfa: nil, jump: nil, keyword: nil }

  parser = OptionParser.new do |opts|
    opts.banner = "Usage: lexer_kit disasm [options] <file.lkt1|file.lkb1>"

    opts.on("--dfa INDEX", Integer, "Show DFA table at INDEX") do |v|
      options[:dfa] = v
    end

    opts.on("--jump INDEX", Integer, "Show jump table at INDEX") do |v|
      options[:jump] = v
    end

    opts.on("--keyword INDEX", Integer, "Show keyword table at INDEX") do |v|
      options[:keyword] = v
    end

    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
  program = CLI.load_lexer(path)

  require "lexer_kit/debug"

  if options[:dfa]
    dfa = program.dfa_tables[options[:dfa]]
    raise ArgumentError, "DFA table #{options[:dfa]} not found" unless dfa

    puts Debug::Visualizer.format_dfa(dfa, program: program)
  elsif options[:jump]
    table = program.jump_tables[options[:jump]]
    raise ArgumentError, "Jump table #{options[:jump]} not found" unless table

    puts Debug::Visualizer.format_jump_table(table)
  elsif options[:keyword]
    table = program.keyword_tables[options[:keyword]]
    raise ArgumentError, "Keyword table #{options[:keyword]} not found" unless table

    puts Debug::Visualizer.format_keyword_table(table, program: program)
  else
    puts Debug::Disassembler.new(program).disassemble
  end

  0
end