[sim] Move Sim classes from HAL to wpilibc/j (#2549)

Also move some things in HAL for consistency.

WAS:
C++:
- C APIs: #include "mockdata/AccelerometerData.h"
- User side class: #include "simulation/AccelerometerSim.h"
Java:
- JNI APIs: hal.sim.mockdata.AccelerometerData (and a few classes in hal.sim)
- User side classes: hal.sim.AccelerometerSim

IS:
C++:
- C APIs: #include "hal/simulation/AccelerometerData.h"
- C++ class: #include "frc/simulation/AccelerometerSim.h"
Java:
- JNI APIs: hal.simulation.AccelerometerData
- User side class: wpilibj.simulation.AccelerometerSim

wpilibc/src/main/native/include/frc/simulation/SPIAccelerometerSim.h

@@ -0,0 +1,96 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2018-2020 FIRST. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#pragma once
+
+#include <memory>
+#include <utility>
+
+#include <hal/simulation/SPIAccelerometerData.h>
+
+#include "CallbackStore.h"
+
+namespace frc {
+namespace sim {
+class SPIAccelerometerSim {
+ public:
+  explicit SPIAccelerometerSim(int index) { m_index = index; }
+
+  std::unique_ptr<CallbackStore> RegisterActiveCallback(NotifyCallback callback,
+                                                        bool initialNotify) {
+    auto store = std::make_unique<CallbackStore>(
+        m_index, -1, callback, &HALSIM_CancelSPIAccelerometerActiveCallback);
+    store->SetUid(HALSIM_RegisterSPIAccelerometerActiveCallback(
+        m_index, &CallbackStoreThunk, store.get(), initialNotify));
+    return store;
+  }
+
+  bool GetActive() const { return HALSIM_GetSPIAccelerometerActive(m_index); }
+
+  void SetActive(bool active) {
+    HALSIM_SetSPIAccelerometerActive(m_index, active);
+  }
+
+  std::unique_ptr<CallbackStore> RegisterRangeCallback(NotifyCallback callback,
+                                                       bool initialNotify) {
+    auto store = std::make_unique<CallbackStore>(
+        m_index, -1, callback, &HALSIM_CancelSPIAccelerometerRangeCallback);
+    store->SetUid(HALSIM_RegisterSPIAccelerometerRangeCallback(
+        m_index, &CallbackStoreThunk, store.get(), initialNotify));
+    return store;
+  }
+
+  int GetRange() const { return HALSIM_GetSPIAccelerometerRange(m_index); }
+
+  void SetRange(int range) { HALSIM_SetSPIAccelerometerRange(m_index, range); }
+
+  std::unique_ptr<CallbackStore> RegisterXCallback(NotifyCallback callback,
+                                                   bool initialNotify) {
+    auto store = std::make_unique<CallbackStore>(
+        m_index, -1, callback, &HALSIM_CancelSPIAccelerometerXCallback);
+    store->SetUid(HALSIM_RegisterSPIAccelerometerXCallback(
+        m_index, &CallbackStoreThunk, store.get(), initialNotify));
+    return store;
+  }
+
+  double GetX() const { return HALSIM_GetSPIAccelerometerX(m_index); }
+
+  void SetX(double x) { HALSIM_SetSPIAccelerometerX(m_index, x); }
+
+  std::unique_ptr<CallbackStore> RegisterYCallback(NotifyCallback callback,
+                                                   bool initialNotify) {
+    auto store = std::make_unique<CallbackStore>(
+        m_index, -1, callback, &HALSIM_CancelSPIAccelerometerYCallback);
+    store->SetUid(HALSIM_RegisterSPIAccelerometerYCallback(
+        m_index, &CallbackStoreThunk, store.get(), initialNotify));
+    return store;
+  }
+
+  double GetY() const { return HALSIM_GetSPIAccelerometerY(m_index); }
+
+  void SetY(double y) { HALSIM_SetSPIAccelerometerY(m_index, y); }
+
+  std::unique_ptr<CallbackStore> RegisterZCallback(NotifyCallback callback,
+                                                   bool initialNotify) {
+    auto store = std::make_unique<CallbackStore>(
+        m_index, -1, callback, &HALSIM_CancelSPIAccelerometerZCallback);
+    store->SetUid(HALSIM_RegisterSPIAccelerometerZCallback(
+        m_index, &CallbackStoreThunk, store.get(), initialNotify));
+    return store;
+  }
+
+  double GetZ() const { return HALSIM_GetSPIAccelerometerZ(m_index); }
+
+  void SetZ(double z) { HALSIM_SetSPIAccelerometerZ(m_index, z); }
+
+  void ResetData() { HALSIM_ResetSPIAccelerometerData(m_index); }
+
+ private:
+  int m_index;
+};
+}  // namespace sim
+}  // namespace frc