bindings: cxx: implement C++ bindings for libgpiod v2.0

This rewrites the C++ bindings for libgpiod in order to work with v2.0 version of the C API. The C++ standard use is C++17 which is well supported in GCC. The documentation covers the entire API so for details please refer to it, the tests and example programs.

I suggested by Kent, I've also split the big patch into several subpatches which are not bisectable but make the review easier.

I'm Cc'ing people who've worked on the C++ bindings over time too in this iteration.

I didn't address all the issues Kent raised in his las review. For the gpiomon example it's because I sent a separate patch fixing the non-blocking behavior of the request file descriptor first.

For the potential edge_event iterator - I simply don't understand how it would work or if it would be needed at all since the code using the buffer and iterating over it is already quite brief.

We can sort that out once we have most of the code in master.

Bartosz Golaszewski (5):
bindings: cxx: remove old code
bindings: cxx: add v2 headers
bindings: cxx: add v2 tests
bindings: cxx: add examples
bindings: cxx: add implementation

 Doxyfile.in                                 |   4 +-
 bindings/cxx/Makefile.am                    |  23 +-
 bindings/cxx/chip-info.cpp                  |  74 ++
 bindings/cxx/chip.cpp                       | 213 +++--
 bindings/cxx/edge-event-buffer.cpp          | 115 +++
 bindings/cxx/edge-event.cpp                 | 135 +++
 bindings/cxx/examples/Makefile.am           |  16 +-
 bindings/cxx/examples/gpiodetectcxx.cpp     |  10 +-
 bindings/cxx/examples/gpiofindcxx.cpp       |   4 +-
 bindings/cxx/examples/gpiogetcxx.cpp        |  19 +-
 bindings/cxx/examples/gpioinfocxx.cpp       |  64 +-
 bindings/cxx/examples/gpiomoncxx.cpp        |  53 +-
 bindings/cxx/examples/gpiosetcxx.cpp        |  33 +-
 bindings/cxx/exception.cpp                  | 119 +++
 bindings/cxx/gpiod.hpp                      | 944 +-------------------
 bindings/cxx/gpiodcxx/Makefile.am           |  18 +
 bindings/cxx/gpiodcxx/chip-info.hpp         | 105 +++
 bindings/cxx/gpiodcxx/chip.hpp              | 179 ++++
 bindings/cxx/gpiodcxx/edge-event-buffer.hpp | 129 +++
 bindings/cxx/gpiodcxx/edge-event.hpp        | 137 +++
 bindings/cxx/gpiodcxx/exception.hpp         | 158 ++++
 bindings/cxx/gpiodcxx/info-event.hpp        | 123 +++
 bindings/cxx/gpiodcxx/line-config.hpp       | 564 ++++++++++++
 bindings/cxx/gpiodcxx/line-info.hpp         | 176 ++++
 bindings/cxx/gpiodcxx/line-request.hpp      | 221 +++++
 bindings/cxx/gpiodcxx/line.hpp              | 274 ++++++
 bindings/cxx/gpiodcxx/misc.hpp              |  44 +
 bindings/cxx/gpiodcxx/request-config.hpp    | 163 ++++
 bindings/cxx/gpiodcxx/timestamp.hpp         | 122 +++
 bindings/cxx/info-event.cpp                 | 102 +++
 bindings/cxx/internal.cpp                   |  28 +
 bindings/cxx/internal.hpp                   | 208 ++++-
 bindings/cxx/iter.cpp                       |  60 --
 bindings/cxx/line-config.cpp                | 685 ++++++++++++++
 bindings/cxx/line-info.cpp                  | 189 ++++
 bindings/cxx/line-request.cpp               | 225 +++++
 bindings/cxx/line.cpp                       | 331 ++-----
 bindings/cxx/line_bulk.cpp                  | 366 --------
 bindings/cxx/misc.cpp                       |  20 +
 bindings/cxx/request-config.cpp             | 174 ++++
 bindings/cxx/tests/Makefile.am              |  28 +-
 bindings/cxx/tests/check-kernel.cpp         |  48 +
 bindings/cxx/tests/gpio-mockup.cpp          | 153 ----
 bindings/cxx/tests/gpio-mockup.hpp          |  94 --
 bindings/cxx/tests/gpiod-cxx-test.cpp       |  55 --
 bindings/cxx/tests/gpiosim.cpp              | 258 ++++++
 bindings/cxx/tests/gpiosim.hpp              |  69 ++
 bindings/cxx/tests/helpers.cpp              |  37 +
 bindings/cxx/tests/helpers.hpp              |  62 ++
 bindings/cxx/tests/tests-chip-info.cpp      | 109 +++
 bindings/cxx/tests/tests-chip.cpp           | 218 +++--
 bindings/cxx/tests/tests-edge-event.cpp     | 417 +++++++++
 bindings/cxx/tests/tests-event.cpp          | 280 ------
 bindings/cxx/tests/tests-info-event.cpp     | 198 ++++
 bindings/cxx/tests/tests-iter.cpp           |  21 -
 bindings/cxx/tests/tests-line-config.cpp    | 270 ++++++
 bindings/cxx/tests/tests-line-info.cpp      | 156 ++++
 bindings/cxx/tests/tests-line-request.cpp   | 490 ++++++++++
 bindings/cxx/tests/tests-line.cpp           | 494 ++--------
 bindings/cxx/tests/tests-misc.cpp           |  78 ++
 bindings/cxx/tests/tests-request-config.cpp | 155 ++++
 configure.ac                                |   1 +
 62 files changed, 7406 insertions(+), 2912 deletions(-)
 create mode 100644 bindings/cxx/chip-info.cpp
 create mode 100644 bindings/cxx/edge-event-buffer.cpp
 create mode 100644 bindings/cxx/edge-event.cpp
 create mode 100644 bindings/cxx/exception.cpp
 create mode 100644 bindings/cxx/gpiodcxx/Makefile.am
 create mode 100644 bindings/cxx/gpiodcxx/chip-info.hpp
 create mode 100644 bindings/cxx/gpiodcxx/chip.hpp
 create mode 100644 bindings/cxx/gpiodcxx/edge-event-buffer.hpp
 create mode 100644 bindings/cxx/gpiodcxx/edge-event.hpp
 create mode 100644 bindings/cxx/gpiodcxx/exception.hpp
 create mode 100644 bindings/cxx/gpiodcxx/info-event.hpp
 create mode 100644 bindings/cxx/gpiodcxx/line-config.hpp
 create mode 100644 bindings/cxx/gpiodcxx/line-info.hpp
 create mode 100644 bindings/cxx/gpiodcxx/line-request.hpp
 create mode 100644 bindings/cxx/gpiodcxx/line.hpp
 create mode 100644 bindings/cxx/gpiodcxx/misc.hpp
 create mode 100644 bindings/cxx/gpiodcxx/request-config.hpp
 create mode 100644 bindings/cxx/gpiodcxx/timestamp.hpp
 create mode 100644 bindings/cxx/info-event.cpp
 create mode 100644 bindings/cxx/internal.cpp
 delete mode 100644 bindings/cxx/iter.cpp
 create mode 100644 bindings/cxx/line-config.cpp
 create mode 100644 bindings/cxx/line-info.cpp
 create mode 100644 bindings/cxx/line-request.cpp
 delete mode 100644 bindings/cxx/line_bulk.cpp
 create mode 100644 bindings/cxx/misc.cpp
 create mode 100644 bindings/cxx/request-config.cpp
 create mode 100644 bindings/cxx/tests/check-kernel.cpp
 delete mode 100644 bindings/cxx/tests/gpio-mockup.cpp
 delete mode 100644 bindings/cxx/tests/gpio-mockup.hpp
 delete mode 100644 bindings/cxx/tests/gpiod-cxx-test.cpp
 create mode 100644 bindings/cxx/tests/gpiosim.cpp
 create mode 100644 bindings/cxx/tests/gpiosim.hpp
 create mode 100644 bindings/cxx/tests/helpers.cpp
 create mode 100644 bindings/cxx/tests/helpers.hpp
 create mode 100644 bindings/cxx/tests/tests-chip-info.cpp
 create mode 100644 bindings/cxx/tests/tests-edge-event.cpp
 delete mode 100644 bindings/cxx/tests/tests-event.cpp
 create mode 100644 bindings/cxx/tests/tests-info-event.cpp
 delete mode 100644 bindings/cxx/tests/tests-iter.cpp
 create mode 100644 bindings/cxx/tests/tests-line-config.cpp
 create mode 100644 bindings/cxx/tests/tests-line-info.cpp
 create mode 100644 bindings/cxx/tests/tests-line-request.cpp
 create mode 100644 bindings/cxx/tests/tests-misc.cpp
 create mode 100644 bindings/cxx/tests/tests-request-config.cpp

2.32.0