I forgot to update the device and parser initialization functions to
store the context pointer into the objects. As a result, the internal
context pointers were always NULL.
The public api is changed to require a context object for all
operations. Because other library objects store the context pointer
internally, only the constructor functions need an explicit context
object as a parameter.
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 D9tx, D6i and D4i have twice the amount of memory compared to the
previous versions (64K versus 32K). To support both variants, a new
layout descriptor is introduced.
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.
The packet size should include both the number of parameter bytes and
the number of data bytes. The packet verification code is modified to be
able to deal with this change too.
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.
