Make SplFileObject countable

spl_directory.c

/* {{{ proto int SplFileObject::count()
   Get total number of lines */
SPL_METHOD(SplFileObject, count)
{
    spl_filesystem_object *intern = (spl_filesystem_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
    long current_pos = intern->u.file.current_line_num;
    long lines_number = 0;

    if (zend_parse_parameters_none() == FAILURE) {
        return;
    }

    // find last line in a file
    spl_filesystem_file_rewind(getThis(), intern TSRMLS_CC);
    while(!php_stream_eof(intern->u.file.stream)) {

        if (spl_filesystem_file_read_line(getThis(), intern, 0 TSRMLS_CC) == FAILURE) {
            break;
        }
    }
    lines_number = intern->u.file.current_line_num;

    // rewind to the original position
    spl_filesystem_file_rewind(getThis(), intern TSRMLS_CC);
    while(intern->u.file.current_line_num < current_pos) {
        if (spl_filesystem_file_read_line(getThis(), intern, 1 TSRMLS_CC) == FAILURE) {
            break;
        }
    }

    RETURN_LONG(lines_number);
} /* }}} */