DC_DEVICE_SET_FINGERPRINT(3) | FreeBSD Library Functions Manual | DC_DEVICE_SET_FINGERPRINT(3) |
dc_device_set_fingerprint
—
set the last-seen dive fingerprint
library “libdivecomputer”
#include
<libdivecomputer/device.h>
dc_status_t
dc_device_set_fingerprint
(dc_device_t
*device, 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.
This returns DC_STATUS_SUCCESS
if the
fingerprint was set or one of several error values on error.
The library
“libdivecomputer” library was written by
Jef Driesen,
jef@libdivecomputer.org.
The manpages were written by
Kristaps Dzonsons,
kristaps@bsd.lv.
January 5, 2017 | FreeBSD 14.3-RELEASE |