to_path_c_ruby.c

static VALUE
rb_f_open(int argc, VALUE *argv)
{
    ID to_open = 0;
    int redirect = FALSE;

    if (argc >= 1) {
  CONST_ID(to_open, "to_open");
	if (rb_respond_to(argv[0], to_open)) {
	    redirect = TRUE;
	}
	else {
	    VALUE tmp = argv[0];
	    FilePathValue(tmp);
	    if (NIL_P(tmp)) {
		redirect = TRUE;
	    }
	    else {
                VALUE cmd = check_pipe_command(tmp);
                if (!NIL_P(cmd)) {
		    argv[0] = cmd;
		    return rb_io_s_popen(argc, argv, rb_cIO);
		}
	    }
	}
    }
    if (redirect) {
	VALUE io = rb_funcall2(argv[0], to_open, argc-1, argv+1);

	if (rb_block_given_p()) {
	    return rb_ensure(rb_yield, io, io_close, io);
	}
	return io;
    }
    return rb_io_s_open(argc, argv, rb_cFile);
}

VALUE
rb_get_path_check_to_string(VALUE obj, int level)
{
    VALUE tmp;
    ID to_path;

    if (insecure_obj_p(obj, level)) {
	rb_insecure_operation();
    }

    if (RB_TYPE_P(obj, T_STRING)) {
	return obj;
    }
    CONST_ID(to_path, "to_path");
    //to_path call!
    tmp = rb_check_funcall(obj, to_path, 0, 0);
    if (tmp == Qundef) {
	tmp = obj;
    }
    StringValue(tmp);
    return tmp;
}