prototyping protocol stuff

CMakeLists.txt

@@ -11,7 +11,11 @@ add_definitions("-std=c++2a -g")
 include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
 conan_basic_setup()
 
-add_library(commons_lib include/commons.cpp)
+add_library(commons_lib
+  include/commons.cpp
+  src/protocol.cpp
+  )
+
 target_include_directories (commons_lib
   PUBLIC
   ${CONAN_INCLUDE_DIRS}
@@ -23,6 +27,22 @@ target_link_libraries(commons_lib
   ${CONAN_LIBS}
   )
 
+add_executable(commons
+  src/main.cpp
+  )
+
+target_include_directories(commons
+  PUBLIC
+    ${CONAN_INCLUDE_DIRS}
+    include
+    commons_lib
+  )
+
+target_link_directories(commons
+  PUBLIC
+    commons_lib
+  )
+
 #enable_testing()
 #add_subdirectory(tests)
 set_target_properties(commons_lib PROPERTIES LINKER_LANGUAGE CXX)

conanfile.txt

@@ -1,4 +1,5 @@
 [requires]
+glm/0.9.9.8
 boost/1.78.0
 spdlog/1.10.0
 gtest/cci.20210126

include/protocol.hpp

@@ -0,0 +1,180 @@
+#pragma once
+
+#include <cstddef>
+
+#include <glm/vec2.hpp>
+#include <glm/vec3.hpp>
+#include <map>
+
+namespace commons::protocol
+{
+
+enum class Type
+{
+  DRAW_RECTANGLE = 0,
+  DRAW_PIXEL,
+  COMPOSED_MESSAGE,
+};
+
+
+struct header
+{
+  Type type;
+  uint32_t message_length;
+};
+
+struct generic_message_base
+{
+	virtual constexpr Type get_type() const = 0;
+	virtual uint32_t get_size() const = 0;
+
+	//virtual void operator()()
+	//{
+	//	if(is_handler)
+	//	{
+	//		handle_message();
+	//		return;
+	//	}
+
+	//	create_message();
+	//}
+
+	//virtual void handle_message() = 0;
+	//virtual void create_message() = 0;
+
+	bool is_handler = false;
+};
+
+template<Type TypeValue>
+struct generic_message : public generic_message_base
+{
+	virtual ~generic_message() = default;
+
+	virtual constexpr Type get_type() const override
+	{
+		return type;
+	}
+
+	virtual header get_header() const
+	{
+		return header{get_type(), get_size()};
+	}
+
+	static constexpr Type type = TypeValue;
+};
+
+struct message
+{
+  //header head;
+  //generic_message_base* msg;
+
+  //bool init_header()
+  //{
+  //  if(!msg)
+  //  {
+  //    return false;
+  //  }
+
+  //  head = msg->get_header();
+  //  return true;
+  //}
+
+  //uint32_t get_size() const
+  //{
+  //}
+};
+
+struct composed_message : public generic_message<Type::COMPOSED_MESSAGE>
+{
+  message** messages;
+};
+
+struct draw_rectangle : public generic_message<Type::DRAW_RECTANGLE>
+{
+  virtual ~draw_rectangle() = default;
+
+  virtual uint32_t get_size() const override
+  {
+    return sizeof(*this);
+  }
+
+  glm::vec2 position;
+  glm::vec2 size;
+  glm::vec3 color;
+};
+
+struct draw_pixel : public generic_message<Type::DRAW_PIXEL>
+{
+  virtual ~draw_pixel() = default;
+
+  virtual uint32_t get_size() const override
+  {
+    return sizeof(*this);
+  }
+
+  glm::vec2 position;
+  glm::vec3 color;
+};
+
+uint32_t get_size(Type type)
+{
+  static std::map<Type, uint32_t> type_map{};
+
+  //initalizes map on first run
+  static bool run_once = [&](){
+    type_map.emplace(Type::DRAW_PIXEL, sizeof(draw_pixel));
+    type_map.emplace(Type::DRAW_RECTANGLE, sizeof(draw_rectangle));
+    type_map.emplace(Type::COMPOSED_MESSAGE, sizeof(composed_message));
+    return true;
+  }();
+
+  return type_map[type];
+}
+
+
+generic_message_base* get_object(Type type, generic_message_base* msg)
+{
+	switch(type)
+	{
+		case Type::COMPOSED_MESSAGE:
+			{
+				return reinterpret_cast<composed_message*>(msg);
+			}
+		case Type::DRAW_RECTANGLE:
+			{
+				return reinterpret_cast<draw_rectangle*>(msg);
+			}
+		case Type::DRAW_PIXEL:
+			{
+				return reinterpret_cast<draw_pixel*>(msg);
+			}
+		default:
+			return nullptr;
+	}
+}
+
+//template<Type T>
+//auto* get_object(generic_message_base* msg)
+//{
+//  return nullptr;
+//}
+//
+//template<>
+//auto* get_object<Type::DRAW_PIXEL>(generic_message_base* msg)
+//{
+//  return reinterpret_cast<draw_pixel*>(msg);
+//}
+//
+//template<>
+//auto* get_object<Type::DRAW_RECTANGLE>(generic_message_base* msg)
+//{
+//  return reinterpret_cast<draw_rectangle*>(msg);
+//}
+//
+//template<>
+//auto* get_object<Type::COMPOSED_MESSAGE>(generic_message_base* msg)
+//{
+//  return reinterpret_cast<composed_message*>(msg);
+//}
+
+}

src/main.cpp

@@ -1,15 +1,27 @@
 #include <iostream>
 #include <boost/asio.hpp>
-#include "crow.h"
+
+#include "protocol.hpp"
 
 int main()
 {
-	crow::SimpleApp app;
+	using namespace commons::protocol;
+	auto draw_msg = draw_rectangle{};
 
-	CROW_ROUTE(app, "/")([]() {
-		return "Hello World";
-	});
+	for(int i = 0; i < 3; ++i)
+	{
+		std::cout << "Size of " << i << " is " << get_size(static_cast<Type>(i)) << "\n";
+	}
+
+	auto rectangle = std::make_unique<draw_pixel>();
+	void* void_ptr = reinterpret_cast<void*>(rectangle.get());
+
+	generic_message_base* rectangle_ptr = reinterpret_cast<generic_message_base*>(void_ptr);
+
+	std::cout << "Type: " << static_cast<int>(rectangle_ptr->get_type()) << "\n";
+	std::cout << "Size: " << static_cast<int>(rectangle_ptr->get_size()) << "\n";
+
+	auto* final_msg = get_object(rectangle_ptr->get_type(), rectangle_ptr);
 
-	app.port(18080).run();
 	return 0;
 }

src/protocol.cpp

@@ -0,0 +1 @@
+#include "protocol.hpp"