Guesses the content type based on example data. If the function is uncertain, @result_uncertain will be set to %TRUE. Either @filename or @data may be %NULL, in which case the guess will be based solely on the other argument.
a string, or %NULL
a stream of data, or %NULL
return location for the certainty of the result, or %NULL
a string indicating a guessed content type for the given data. Free with g_free()
See Implementation
Guesses the content type based on example data. If the function is uncertain, @result_uncertain will be set to %TRUE. Either @filename or @data may be %NULL, in which case the guess will be based solely on the other argument.