Move CameraServer and WPILib headers into their own folder

The old headers were moved into folders because doing so avoids polluting
the system include directories.

Folder names were also normalized to lowercase.

wpilibc/src/main/native/cpp/commands/Subsystem.cpp

@@ -0,0 +1,114 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2011-2018 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/commands/Subsystem.h"
+
+#include "frc/WPIErrors.h"
+#include "frc/commands/Command.h"
+#include "frc/commands/Scheduler.h"
+#include "frc/livewindow/LiveWindow.h"
+#include "frc/smartdashboard/SendableBuilder.h"
+
+using namespace frc;
+
+Subsystem::Subsystem(const wpi::Twine& name) {
+  SetName(name, name);
+  Scheduler::GetInstance()->RegisterSubsystem(this);
+}
+
+void Subsystem::SetDefaultCommand(Command* command) {
+  if (command == nullptr) {
+    m_defaultCommand = nullptr;
+  } else {
+    const auto& reqs = command->GetRequirements();
+    if (std::find(reqs.begin(), reqs.end(), this) == reqs.end()) {
+      wpi_setWPIErrorWithContext(
+          CommandIllegalUse, "A default command must require the subsystem");
+      return;
+    }
+
+    m_defaultCommand = command;
+  }
+}
+
+Command* Subsystem::GetDefaultCommand() {
+  if (!m_initializedDefaultCommand) {
+    m_initializedDefaultCommand = true;
+    InitDefaultCommand();
+  }
+  return m_defaultCommand;
+}
+
+wpi::StringRef Subsystem::GetDefaultCommandName() {
+  Command* defaultCommand = GetDefaultCommand();
+  if (defaultCommand) {
+    return defaultCommand->GetName();
+  } else {
+    return wpi::StringRef();
+  }
+}
+
+void Subsystem::SetCurrentCommand(Command* command) {
+  m_currentCommand = command;
+  m_currentCommandChanged = true;
+}
+
+Command* Subsystem::GetCurrentCommand() const { return m_currentCommand; }
+
+wpi::StringRef Subsystem::GetCurrentCommandName() const {
+  Command* currentCommand = GetCurrentCommand();
+  if (currentCommand) {
+    return currentCommand->GetName();
+  } else {
+    return wpi::StringRef();
+  }
+}
+
+void Subsystem::Periodic() {}
+
+void Subsystem::InitDefaultCommand() {}
+
+void Subsystem::AddChild(const wpi::Twine& name,
+                         std::shared_ptr<Sendable> child) {
+  AddChild(name, *child);
+}
+
+void Subsystem::AddChild(const wpi::Twine& name, Sendable* child) {
+  AddChild(name, *child);
+}
+
+void Subsystem::AddChild(const wpi::Twine& name, Sendable& child) {
+  child.SetName(GetSubsystem(), name);
+  LiveWindow::GetInstance()->Add(&child);
+}
+
+void Subsystem::AddChild(std::shared_ptr<Sendable> child) { AddChild(*child); }
+
+void Subsystem::AddChild(Sendable* child) { AddChild(*child); }
+
+void Subsystem::AddChild(Sendable& child) {
+  child.SetSubsystem(GetSubsystem());
+  LiveWindow::GetInstance()->Add(&child);
+}
+
+void Subsystem::ConfirmCommand() {
+  if (m_currentCommandChanged) m_currentCommandChanged = false;
+}
+
+void Subsystem::InitSendable(SendableBuilder& builder) {
+  builder.SetSmartDashboardType("Subsystem");
+
+  builder.AddBooleanProperty(
+      ".hasDefault", [=]() { return m_defaultCommand != nullptr; }, nullptr);
+  builder.AddStringProperty(".default",
+                            [=]() { return GetDefaultCommandName(); }, nullptr);
+
+  builder.AddBooleanProperty(
+      ".hasCommand", [=]() { return m_currentCommand != nullptr; }, nullptr);
+  builder.AddStringProperty(".command",
+                            [=]() { return GetCurrentCommandName(); }, nullptr);
+}