Adding the "dc_" namespace prefix (which is of course an abbreviation
for libdivecomputer) should avoid conflicts with other libraries. For
the time being, only the high-level device and parser layers are
changed.
The public header files are moved to a new subdirectory, to separate
the definition of the public interface from the actual implementation.
Using an identical directory layout as the final installation has the
advantage that the example code can be build outside the project tree
without any modifications to the #include statements.
The handshaking is now automatically restarted whenever a non-fatal
error (such as a timeout or a protocol violation) is encountered.
Previously, only corrupt handshake packets where handled.
If the first few bytes of the timestamp are equal to zero, they were
incorrectly identified as part of the header marker. The correct header
marker is located a the start of this zero byte sequence, not the end.
When the Sensus Ultra reaches the end of a memory page while recording
data, the next page is erased to all 0xFF, and the current page cursor
is advanced. With this memory usage scheme, the last page will be empty
if the previous one was just filled.
To be able to cancel an operation, an application should register a
callback function that returns a non-zero value whenever the active
operaton should be cancelled. A backend can invoke this callback function
to query the application for a pending cancellation request.
Due to the internal memory buffering scheme of the Sensus Ultra, the
last page might contain a partial dive. Skipping this dive is more
apropriate than returning an error.
Using a resizable memory buffer allows to allocate the right amount of
memory inside the backend, avoiding having to know the required buffer
size in advance.
Moved the initialization of the backend pointers to the beginning of the
source file. Without the need for a tentative definition, the library
can be compiled with a C++ compiler.
When necessary, an output parameter is added to provide the size
information. Status codes are strictly reserved for providing status
information only.
