the GAsyncResult that was provided to the callback.
a gsize to get the length of the data read in.
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.
Deprecated: Use DataInputStream.readUptoFinish instead, which has more consistent behaviour regarding the stop character.
GException on failure.
2.20
Finish an asynchronous call started by DataInputStream.readUntilAsync.