IGameInputDevice::GetControllerSwitchInfo

uint32_t GetControllerSwitchInfo(
    uint32_t infoArrayCount,
    GameInputControllerSwitchInfo* infoArray
);

uint32_t switchCount = device->GetControllerSwitchCount();
std::vector<GameInputControllerSwitchInfo> switchInfo(switchCount);
switchInfo.resize(device->GetControllerSwitchInfo(switchCount, switchInfo.data()));

std::vector<GameInputSwitchPosition> switchStates(reading->GetControllerSwitchCount());
reading->GetControllerSwitchState(static_cast<uint32_t>(switchStates.size()), switchStates.data());

for (size_t i = 0; i < switchInfo.size() && i < switchStates.size(); ++i)
{
    // switchInfo[i] describes the switch whose position is switchStates[i].
}