add proto files

wpimath/src/main/native/cpp/kinematics/proto/DifferentialDriveWheelPositionsProto.cpp

@@ -0,0 +1,32 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+#include "frc/kinematics/proto/DifferentialDriveWheelPositionsProto.h"
+
+#include "kinematics.pb.h"
+
+google::protobuf::Message* wpi::Protobuf<
+    frc::DifferentialDriveWheelPositions>::New(google::protobuf::Arena* arena) {
+  return google::protobuf::Arena::CreateMessage<
+      wpi::proto::ProtobufDifferentialDriveWheelPositions>(arena);
+}
+
+frc::DifferentialDriveWheelPositions
+wpi::Protobuf<frc::DifferentialDriveWheelPositions>::Unpack(
+    const google::protobuf::Message& msg) {
+  auto m = static_cast<const wpi::proto::ProtobufDifferentialDriveWheelPositions*>(
+      &msg);
+  return frc::DifferentialDriveWheelPositions{
+      units::meters_per_second_t{m->left()},
+      units::meters_per_second_t{m->right()},
+  };
+}
+
+void wpi::Protobuf<frc::DifferentialDriveWheelPositions>::Pack(
+    google::protobuf::Message* msg,
+    const frc::DifferentialDriveWheelPositions& value) {
+  auto m = static_cast<wpi::proto::ProtobufDifferentialDriveWheelPositions*>(msg);
+  m->set_left(value.left.value());
+  m->set_right(value.right.value());
+}

wpimath/src/main/native/include/frc/kinematics/proto/DifferentialDriveWheelPositionsProto.h

@@ -0,0 +1,19 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+#pragma once
+
+#include <wpi/SymbolExports.h>
+#include <wpi/protobuf/Protobuf.h>
+
+#include "frc/kinematics/DifferentialDriveWheelPositions.h"
+
+template <>
+struct WPILIB_DLLEXPORT wpi::Protobuf<frc::DifferentialDriveWheelPositions> {
+  static google::protobuf::Message* New(google::protobuf::Arena* arena);
+  static frc::DifferentialDriveWheelPositions Unpack(
+      const google::protobuf::Message& msg);
+  static void Pack(google::protobuf::Message* msg,
+                   const frc::DifferentialDriveWheelPositions& value);
+};