def main(): arg_len = len(sys.argv) file_list = [] output_file = "" parsers = [] if arg_len == 1: dir_name = os.getcwd() output_file = dir_name + '/' + dir_name.split('/')[-1] + ".asm" for f in os.listdir(dir_name): if f.endswith(".vm"): file_list.append(f) if not file_list: print("Error, no .vm files in current directory") return elif arg_len == 2: if os.path.isdir(sys.argv[1]): output_file = sys.argv[1] + sys.argv[1].split('/')[-2] + ".asm" for f in os.listdir(sys.argv[1]): if f.endswith(".vm"): file_list.append(f) if not file_list: print("Error, no .vm files in given directory") return file_list = [sys.argv[1] + "/" + f for f in file_list] else: if os.path.splitext(sys.argv[1])[1] != ".vm": print("Error, .vm file not specified") return else: file_list.append(sys.argv[1]) output_file = os.path.splitext(sys.argv[1])[0] + ".asm" try: writer = CodeWriter(output_file) except IOError as e: print("In codewriter: ") print(e) return else: try: parsers = [Parser(f) for f in file_list] except IOError as e: print("In parsers: ") print(e) return else: writer.write_init() for p in parsers: writer.set_file_name(p.static_name) while p.hasMoreCommands(): p.advance() cmd = p.command_type() if cmd != "C_RETURN": argument1 = p.arg1() if cmd in ["C_POP", "C_PUSH", "C_FUNCTION", "C_CALL"]: argument2 = p.arg2() if cmd == "C_ARITHMETIC": writer.write_arithmetic(argument1) elif cmd in ["C_POP", "C_PUSH"]: writer.write_push_pop(cmd, argument1, argument2) elif cmd == "C_LABEL": writer.write_label(argument1) elif cmd == "C_GOTO": writer.write_goto(argument1) elif cmd == "C_IF": writer.write_if(argument1) elif cmd == "C_FUNCTION": writer.write_function(argument1, int(argument2)) elif cmd == "C_CALL": writer.write_call(argument1, argument2) elif cmd == "C_RETURN": writer.write_return() writer.close()