Prior to this change, libx52_init needed a supported joystick to be
plugged in, otherwise it would fail with LIBX52_ERROR_NO_DEVICE. This
change modifies the behavior so that libx52_init would still succeed,
but the application should call libx52_connect to make sure that the
device handle is valid. libx52_init still tries to connect to the
joystick, but absence is no longer treated as a failure.
This change also modifies x52cli to check that the joystick is actually
connected before calling the individual handlers. Because libx52_init no
longer fails if the joystick is absent, we need to rely on the return
code from libx52_connect.
Prior to this change, x52cli assumed that the return code from the
handler was a standard error code, but negated. This is an incorrect
assumption as the libx52 API returns a `libx52_error_code` enum, which
is a positive integer.
This change fixes the printing of the error message to call
`libx52_strerror`, which translates it correctly. It also adds error
printing to any failure of `libx52_init`, as well as explicitly
specifying `LIBX52_SUCCESS` instead of `0`.
Addresses #19.
- libx52_init returns the libx52_device in an output parameter and
returns a libx52_error_code
- Make all functions return libx52_error_code
- Update package version to indicate incompatible API change
nirenjan
Lars Wendler