some work on pad emulation (WIP)

src/Emulator/HLE/Libraries/LibPad/controller.cpp

@@ -0,0 +1,51 @@
+#include "controller.h"
+
+namespace Emulator::Host::Controller {
+GameController::GameController() { m_states_num = 0;
+    m_last_state = State();
+}
+void GameController::readState(State* state, bool* isConnected, int* connectedCount) {
+    Lib::LockMutexGuard lock(m_mutex);
+
+    *isConnected = m_connected;
+    *connectedCount = m_connected_count;
+    *state = getLastState();
+}
+
+State GameController::getLastState() const {
+    if (m_states_num == 0) {
+        return m_last_state;
+    }
+
+    auto last = (m_first_state + m_states_num - 1) % MAX_STATES;
+
+    return m_states[last];
+}
+
+void GameController::addState(const State& state) {
+    if (m_states_num >= MAX_STATES) {
+        m_states_num = MAX_STATES - 1;
+        m_first_state = (m_first_state + 1) % MAX_STATES;
+    }
+
+    auto index = (m_first_state + m_states_num) % MAX_STATES;
+
+    m_states[index] = state;
+    m_last_state = state;
+
+    m_states_num++;
+}
+
+void GameController::checKButton(int id, u32 button, bool isPressed) {
+    Lib::LockMutexGuard lock(m_mutex);
+    auto state = getLastState();
+    if (isPressed) {
+        state.buttonsState |= button;
+    } else {
+        state.buttonsState &= ~button;
+    }
+
+    addState(state);
+}
+
+}  // namespace Emulator::Host::Controller