Squashed 'third_party/allwpilib/' content from commit b0167e633

Change-Id: I5653017a690eec1917e8fff9017195d8af307926
git-subtree-dir: third_party/allwpilib
git-subtree-split: b0167e6337135545e7053acb89dd5726accc7dec
diff --git a/wpilibc/src/main/native/cpp/GearTooth.cpp b/wpilibc/src/main/native/cpp/GearTooth.cpp
new file mode 100644
index 0000000..5fb5021
--- /dev/null
+++ b/wpilibc/src/main/native/cpp/GearTooth.cpp
@@ -0,0 +1,46 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2008-2019 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.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include "frc/GearTooth.h"
+
+#include "frc/smartdashboard/SendableBuilder.h"
+#include "frc/smartdashboard/SendableRegistry.h"
+
+using namespace frc;
+
+constexpr double GearTooth::kGearToothThreshold;
+
+GearTooth::GearTooth(int channel, bool directionSensitive) : Counter(channel) {
+  EnableDirectionSensing(directionSensitive);
+  SendableRegistry::GetInstance().SetName(this, "GearTooth", channel);
+}
+
+GearTooth::GearTooth(DigitalSource* source, bool directionSensitive)
+    : Counter(source) {
+  EnableDirectionSensing(directionSensitive);
+  SendableRegistry::GetInstance().SetName(this, "GearTooth",
+                                          source->GetChannel());
+}
+
+GearTooth::GearTooth(std::shared_ptr<DigitalSource> source,
+                     bool directionSensitive)
+    : Counter(source) {
+  EnableDirectionSensing(directionSensitive);
+  SendableRegistry::GetInstance().SetName(this, "GearTooth",
+                                          source->GetChannel());
+}
+
+void GearTooth::EnableDirectionSensing(bool directionSensitive) {
+  if (directionSensitive) {
+    SetPulseLengthMode(kGearToothThreshold);
+  }
+}
+
+void GearTooth::InitSendable(SendableBuilder& builder) {
+  Counter::InitSendable(builder);
+  builder.SetSmartDashboardType("Gear Tooth");
+}