Allowed sharing of common C++ code between RoboRIO and Simulation.

Change-Id: I8bf2bda9df389c13ae0567a62dbf0ca931ceb6f8

wpilibc/wpilibC++Devices/src/AnalogPotentiometer.cpp

@@ -0,0 +1,77 @@
+
+#include "AnalogPotentiometer.h"
+
+/**
+ * Common initialization code called by all constructors.
+ */
+void AnalogPotentiometer::initPot(AnalogInput *input, double scale, double offset) {
+    m_scale = scale;
+    m_offset = offset;
+    m_analog_input = input;
+}
+
+AnalogPotentiometer::AnalogPotentiometer(int channel, double scale, double offset) {
+    m_init_analog_input = true;
+    initPot(new AnalogInput(channel), scale, offset);
+}
+
+AnalogPotentiometer::AnalogPotentiometer(AnalogInput *input, double scale, double offset) {
+    m_init_analog_input = false;
+    initPot(input, scale, offset);
+}
+
+AnalogPotentiometer::AnalogPotentiometer(AnalogInput &input, double scale, double offset) {
+    m_init_analog_input = false;
+    initPot(&input, scale, offset);
+}
+
+AnalogPotentiometer::~AnalogPotentiometer() {
+  if(m_init_analog_input){
+    delete m_analog_input;
+    m_init_analog_input = false;
+  }
+}
+
+/**
+ * Get the current reading of the potentiomere.
+ *
+ * @return The current position of the potentiometer.
+ */
+double AnalogPotentiometer::Get() {
+    return m_analog_input->GetVoltage() * m_scale + m_offset;
+}
+
+/**
+ * Implement the PIDSource interface.
+ *
+ * @return The current reading.
+ */
+double AnalogPotentiometer::PIDGet() {
+    return Get();
+}
+
+
+/**
+ * @return the Smart Dashboard Type
+ */
+std::string AnalogPotentiometer::GetSmartDashboardType() {
+    return "Analog Input";
+}
+
+/**
+ * Live Window code, only does anything if live window is activated.
+ */
+void AnalogPotentiometer::InitTable(ITable *subtable) {
+    m_table = subtable;
+    UpdateTable();
+}
+
+void AnalogPotentiometer::UpdateTable() {
+    if (m_table != NULL) {
+        m_table->PutNumber("Value", Get());
+    }
+}
+
+ITable* AnalogPotentiometer::GetTable() {
+    return m_table;
+}