== DETAILS
Use a little trickery to ensure the GCA driver continues working
with other HID implementation.
I've expanded the joypad implementation to support multi-pad devices.
However, this requires changes to each HID implementation to actually
function.
I've made the necessary changes for WIIU, but I don't have the means
of making the change in the other HID implementations.
So, I've built in a backwards-compatibilty mode for the driver.
The trick is to have an identifier byte at the top of both data structs
that the driver returns. We can then use that byte to determine which
of the structs has been passed to the pad functions and act accordingly.
In the GCA case, for non-wiiu platforms, it will simply expose port 1
of the GCA and the other 3 ports do nothing.
== DETAILS
When I first implemented the Wii U HID architecture, I ended up
having to design my own implementation because, at the time, I did
not have a way to read the HID device string to allow the existing
code to successfully detect the gamepad.
After spending some time experimenting, I've figured out how to
do this. And that means I can better align the HID driver with other
platforms.
change summary:
- create a single state structure for all three sub-types of wiiu pads
(kpad, wpad, and hid)
- eliminate confusing duplicate pad lists
- eliminate confusing duplicate HID pad drivers (ds3, gamecube
adapter, etc)
- ensure the ds3 driver still works
== DETAILS
So, basically this back-and-forth is because we used fixed-size
data types (i.e. `uint32_t`) which maps to different primitive data
types on different platforms. So `uint32_t` might be a `long` on some
platforms (e.g. Wii U), while it's just a plain integer on others (PC).
And the format specifier works off primitive data type, not data type
size.
So, to resolve this, we:
- keep `%lx` as the format specifier
- cast the parameter to printf to unsigned long
This is better than the alternatives that could cause problems trying to
cast a long down to an int.
== DETAILS
These changes fall into a few broad categories:
1. Explicitly undefine things we want to re-define due to conflicts with
the version of devkitpro we're using
2. Clean up hex format specifiers to use `%lx` or `%lX` when working with
long integers
3. Move variables inside the ifdef they're used in to squelch "unused variable"
messages
4. Add parenthesis to make Wii U shader declarations stop complaining
And then there's a weird "misleading indent" warning that I fixed by just
rewriting a block of code to use a switch statement instead of if-then-else.
These changes work fine on Wii U, but we'll need to keep an eye on CI/CD to see
if other platform builds break.
