Squashed 'third_party/allwpilib_2017/' content from commit 35ac87d

Change-Id: I7bb6f5556c30d3f5a092e68de0be9c710c60c9f4
git-subtree-dir: third_party/allwpilib_2017
git-subtree-split: 35ac87d6ff8b7f061c4f18c9ea316e5dccd4888a
diff --git a/wpilibc/sim/src/simulation/SimDigitalInput.cpp b/wpilibc/sim/src/simulation/SimDigitalInput.cpp
new file mode 100644
index 0000000..c4dbde6
--- /dev/null
+++ b/wpilibc/sim/src/simulation/SimDigitalInput.cpp
@@ -0,0 +1,24 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2014-2017. 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 "simulation/SimDigitalInput.h"
+
+#include "simulation/MainNode.h"
+
+using namespace frc;
+
+SimDigitalInput::SimDigitalInput(std::string topic) {
+  sub = MainNode::Subscribe("~/simulator/" + topic, &SimDigitalInput::callback,
+                            this);
+  std::cout << "Initialized ~/simulator/" + topic << std::endl;
+}
+
+bool SimDigitalInput::Get() { return value; }
+
+void SimDigitalInput::callback(const gazebo::msgs::ConstBoolPtr& msg) {
+  value = msg->data();
+}