NAME dc_device_set_fingerprint — set the last-seen dive fingerprint
LIBRARY library “libdivecomputer”
SYNOPSIS #include <libdivecomputer/device.h>
, const unsigned char data
, unsigned int size
Sets the last-seen dive fingerprint on a device opened with dc_device_open(3)
. This mechanism is used to only download dives “newer” (as reported by the dive computer, not necessarily on the calendar) than the last seen dive.
In general usage, the fingerprint is acquired (and saved) from the first dive downloaded from a dive computer by dc_device_foreach(3)
. In subsequent openings of the device, the fingerprint is set with dc_device_set_fingerprint
and, when a dive reports a fingerprint matching that dive, the download exits before reporting that dive. (The first fingerprint is saved again for subsequent invocations.) In this way, only the newest dives are reported.
RETURN VALUES This returns DC_STATUS_SUCCESS if the fingerprint was set or one of several error values on error.