From 9e90ba4abb7c9ba843fb0c9a6f1fd5e5eaf5c8bb Mon Sep 17 00:00:00 2001
From: Dominik Drexler <dominik.drexler@gmx.net>
Date: Sun, 25 Aug 2024 12:03:20 +0200
Subject: [PATCH] added basic version of v2 which will be a templated wrapper
 around flexbuffer

---
 dependencies/CMakeLists.txt                  |  1 +
 dependencies/flatbuffers/CMakeLists.txt      | 21 +++++++
 include/flatmemory/details/types/vector2.hpp | 60 ++++++++++++++++++++
 src/CMakeLists.txt                           |  7 +++
 4 files changed, 89 insertions(+)
 create mode 100644 dependencies/flatbuffers/CMakeLists.txt
 create mode 100644 include/flatmemory/details/types/vector2.hpp

diff --git a/dependencies/CMakeLists.txt b/dependencies/CMakeLists.txt
index 2694af9..10e0d8c 100644
--- a/dependencies/CMakeLists.txt
+++ b/dependencies/CMakeLists.txt
@@ -4,3 +4,4 @@ project(dependencies)
 
 add_subdirectory(benchmark)
 add_subdirectory(googletest)
+add_subdirectory(flatbuffers)
\ No newline at end of file
diff --git a/dependencies/flatbuffers/CMakeLists.txt b/dependencies/flatbuffers/CMakeLists.txt
new file mode 100644
index 0000000..d541298
--- /dev/null
+++ b/dependencies/flatbuffers/CMakeLists.txt
@@ -0,0 +1,21 @@
+cmake_minimum_required(VERSION 3.21)
+project(InstallFlatbuffers)
+
+include(ExternalProject)
+
+list(APPEND CMAKE_ARGS
+    -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX}
+)
+
+message(STATUS "Preparing external project \"flatbuffers\" with args:")
+foreach(CMAKE_ARG ${CMAKE_ARGS})
+    message(STATUS "-- ${CMAKE_ARG}")
+endforeach()
+
+ExternalProject_Add(
+    flatbuffers
+    GIT_REPOSITORY git@github.com:google/flatbuffers.git
+    GIT_TAG master
+    PREFIX ${CMAKE_BINARY_DIR}/flatbuffers
+    CMAKE_ARGS ${CMAKE_ARGS}
+)
diff --git a/include/flatmemory/details/types/vector2.hpp b/include/flatmemory/details/types/vector2.hpp
new file mode 100644
index 0000000..d0c7c1d
--- /dev/null
+++ b/include/flatmemory/details/types/vector2.hpp
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2024 Dominik Drexler
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef FLATMEMORY_TYPES_VECTOR2_HPP_
+#define FLATMEMORY_TYPES_VECTOR2_HPP_
+
+#include "flatmemory/details/algorithms/hash.hpp"
+#include "flatmemory/details/algorithms/murmurhash3.hpp"
+#include "flatmemory/details/byte_buffer.hpp"
+#include "flatmemory/details/byte_buffer_utils.hpp"
+#include "flatmemory/details/layout.hpp"
+#include "flatmemory/details/layout_utils.hpp"
+#include "flatmemory/details/types/declarations.hpp"
+#include "flatmemory/details/types/formatter.hpp"
+
+#include <algorithm>
+#include <cassert>
+#include <flatbuffers/flexbuffers.h>
+#include <iostream>
+#include <ranges>
+#include <vector>
+
+namespace flatmemory
+{
+/**
+ * ID class for non-trivial Vector type.
+ */
+template<IsTriviallyCopyableOrNonTrivialType T>
+struct Vector2 : public NonTrivialType
+{
+    /// @brief Non-trivial copy-constructor
+    /// @param other
+    Vector(const Vector& other) {}
+};
+
+template<IsTriviallyCopyableOrNonTrivialType T>
+class Builder<Vector2<T>> : public IBuilder<Builder<Vector2<T>>>
+{
+public:
+private:
+    flexbuffers::Builder m_fbb;
+};
+
+}
+
+#endif
\ No newline at end of file
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index c3540c5..e68aaae 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -7,6 +7,13 @@ file(GLOB_RECURSE FLATMEMORY_PUBLIC_HEADER_FILES
 
 add_library(flatmemory STATIC ${FLATMEMORY_SRC_FILES} ${FLATMEMORY_PRIVATE_HEADER_FILES} ${FLATMEMORY_PUBLIC_HEADER_FILES})
 
+find_package(flatbuffers REQUIRED COMPONENTS flatbuffers PATHS ${CMAKE_PREFIX_PATH} NO_DEFAULT_PATH)
+if(flatbuffers_FOUND)
+  include_directories(${flatbuffers_INCLUDE_DIRS})
+  message(STATUS "Found flatbuffers: ${flatbuffers_DIR} (found version ${flatbuffers_VERSION})")
+endif()
+target_link_libraries(flatmemory flatbuffers::flatbuffers)
+
 # Create an alias for simpler reference
 add_library(flatmemory::flatmemory ALIAS flatmemory)