characters to terminate the read
length of @stop_chars. May be -1 if @stop_chars is nul-terminated
a #gsize to get the length of the data read in
optional #GCancellable object, %NULL to ignore
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
GException on failure.
2.26
Reads a string from the data input stream, up to the first occurrence of any of the stop characters.
In contrast to g_data_input_stream_read_until(), 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() again.
Note that @stop_chars may contain '\0' if @stop_chars_len is specified.
The returned string will always be nul-terminated on success.