the GAsyncResult that was provided to the callback
a string with the data that was read before encountering any of the stop characters. Set length to a gsize to get the length of the string. This function will return NULL on an error. [transfer full]
GException on failure.
Finish an asynchronous call started by g_data_input_stream_read_upto_async(). Note that this function does not consume the stop character. You have to use g_data_input_stream_read_byte() to get it before calling g_data_input_stream_read_upto_async() again. Since 2.24