[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/DIOSim.h

@@ -0,0 +1,100 @@
+/*----------------------------------------------------------------------------*/
+/* 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/DIOData.h>
+
+#include "CallbackStore.h"
+
+namespace frc {
+namespace sim {
+class DIOSim {
+ public:
+  explicit DIOSim(int index) { m_index = index; }
+
+  std::unique_ptr<CallbackStore> RegisterInitializedCallback(
+      NotifyCallback callback, bool initialNotify) {
+    auto store = std::make_unique<CallbackStore>(
+        m_index, -1, callback, &HALSIM_CancelDIOInitializedCallback);
+    store->SetUid(HALSIM_RegisterDIOInitializedCallback(
+        m_index, &CallbackStoreThunk, store.get(), initialNotify));
+    return store;
+  }
+
+  bool GetInitialized() const { return HALSIM_GetDIOInitialized(m_index); }
+
+  void SetInitialized(bool initialized) {
+    HALSIM_SetDIOInitialized(m_index, initialized);
+  }
+
+  std::unique_ptr<CallbackStore> RegisterValueCallback(NotifyCallback callback,
+                                                       bool initialNotify) {
+    auto store = std::make_unique<CallbackStore>(
+        m_index, -1, callback, &HALSIM_CancelDIOValueCallback);
+    store->SetUid(HALSIM_RegisterDIOValueCallback(m_index, &CallbackStoreThunk,
+                                                  store.get(), initialNotify));
+    return store;
+  }
+
+  bool GetValue() const { return HALSIM_GetDIOValue(m_index); }
+
+  void SetValue(bool value) { HALSIM_SetDIOValue(m_index, value); }
+
+  std::unique_ptr<CallbackStore> RegisterPulseLengthCallback(
+      NotifyCallback callback, bool initialNotify) {
+    auto store = std::make_unique<CallbackStore>(
+        m_index, -1, callback, &HALSIM_CancelDIOPulseLengthCallback);
+    store->SetUid(HALSIM_RegisterDIOPulseLengthCallback(
+        m_index, &CallbackStoreThunk, store.get(), initialNotify));
+    return store;
+  }
+
+  double GetPulseLength() const { return HALSIM_GetDIOPulseLength(m_index); }
+
+  void SetPulseLength(double pulseLength) {
+    HALSIM_SetDIOPulseLength(m_index, pulseLength);
+  }
+
+  std::unique_ptr<CallbackStore> RegisterIsInputCallback(
+      NotifyCallback callback, bool initialNotify) {
+    auto store = std::make_unique<CallbackStore>(
+        m_index, -1, callback, &HALSIM_CancelDIOIsInputCallback);
+    store->SetUid(HALSIM_RegisterDIOIsInputCallback(
+        m_index, &CallbackStoreThunk, store.get(), initialNotify));
+    return store;
+  }
+
+  bool GetIsInput() const { return HALSIM_GetDIOIsInput(m_index); }
+
+  void SetIsInput(bool isInput) { HALSIM_SetDIOIsInput(m_index, isInput); }
+
+  std::unique_ptr<CallbackStore> RegisterFilterIndexCallback(
+      NotifyCallback callback, bool initialNotify) {
+    auto store = std::make_unique<CallbackStore>(
+        m_index, -1, callback, &HALSIM_CancelDIOFilterIndexCallback);
+    store->SetUid(HALSIM_RegisterDIOFilterIndexCallback(
+        m_index, &CallbackStoreThunk, store.get(), initialNotify));
+    return store;
+  }
+
+  int GetFilterIndex() const { return HALSIM_GetDIOFilterIndex(m_index); }
+
+  void SetFilterIndex(int filterIndex) {
+    HALSIM_SetDIOFilterIndex(m_index, filterIndex);
+  }
+
+  void ResetData() { HALSIM_ResetDIOData(m_index); }
+
+ private:
+  int m_index;
+};
+}  // namespace sim
+}  // namespace frc