bytes_needed

Description:

public static ssize_t bytes_needed (uint8[] blob) throws Error

Utility function to calculate how many bytes are needed to completely deserialize the D-Bus message stored at blob.

blob	A blob represent a binary D-Bus message.
blob_len	The length of `blob` (must be at least 16).

Number of bytes needed or -1 if throws is set (e.g. if blob contains invalid data or not enough data is available to determine the size).