DataInputStream.readUptoAsync

void readUptoAsync(string stopChars,  int  ioPriority,  gio.cancellable.Cancellable cancellable =  null,  gio.types.AsyncReadyCallback callback =  null)

The asynchronous version of [gio.data_input_stream.DataInputStream.readUpto]. It is an error to have two outstanding calls to this function.

In contrast to [gio.data_input_stream.DataInputStream.readUntil], this function does not consume the stop character. You have to use [gio.data_input_stream.DataInputStream.readByteData] to get it before calling [gio.data_input_stream.DataInputStream.readUpto] again.

Note that stop_chars may contain '\0' if stop_chars_len is specified.

When the operation is finished, callback will be called. You can then call [gio.data_input_stream.DataInputStream.readUptoFinish] to get the result of the operation.

Parameters

`stopChars`	characters to terminate the read
`ioPriority`	the [I/O priority][io-priority] of the request
`cancellable`	optional #GCancellable object, null to ignore
`callback`	callback to call when the request is satisfied