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For most I/O stream implementations the serial communication specific functions are meaningless. Implementing them as no-ops allows the dive computer backends the call the I/O stream functions unconditionally. However, implementing the no-op with a dummy function returning DC_STATUS_SUCCESS, does not only add some (small) overhead at runtime, but also requires many such functions. This is inconvenient and the same result can easily be obtained by using a NULL pointer instead. The consequence is that the logic is reversed now. To obtain the previous behaviour of returning the DC_STATUS_UNSUPPORTED error code again, you'll need to implement a dummy function. But that's fine because it's the less common case.
Overview ======== Libdivecomputer is a cross-platform and open source library for communication with dive computers from various manufacturers. The official web site is: http://www.libdivecomputer.org/ The sourceforge project page is: http://sourceforge.net/projects/libdivecomputer/ Installation ============ On UNIX-like systems (including Linux, Mac OS X, MinGW), use the autotools based build system. Run the following commands from the top directory (containing this file) to configure, build and install the library and utilities: $ ./configure $ make $ make install If you downloaded the libdivecomputer source code directly from the git source code repository, then you need to create the configure script as the first step: $ autoreconf --install To uninstall libdivecomputer again, run: $ make uninstall Support ======= Please send bug reports, feedback or questions to the mailing list: http://libdivecomputer.org/cgi-bin/mailman/listinfo/devel or contact me directly: jef@libdivecomputer.org License ======= Libdivecomputer is free software, released under the terms of the GNU Lesser General Public License (LGPL). You can find a copy of the license in the file COPYING.