SSX3LobbyServer/lib/base/types.hpp

//! Core types and includes
#pragma once

#include <cstdint>
#include <memory>

// these are in the global namespace since most libraries
// won't try defining anything like this in the global namespace
// (and I'd like these types to be used globally a lot more anyways)
using u8 = std::uint8_t;
using i8 = std::int8_t;
using u16 = std::uint16_t;
using i16 = std::int16_t;
using u32 = std::uint32_t;
using i32 = std::int32_t;
using u64 = std::uint64_t;
using i64 = std::int64_t;
using usize = std::size_t;
using isize = std::intptr_t;

// Include the impl library's ASIO config, since we pull it in
#include <impl/asio_config.hpp>

namespace boost::json {}
namespace boost::urls {}

namespace burl = boost::urls;

// Namespace aliases, these are used throughout the project
namespace bsys = boost::system;
namespace json = boost::json;

namespace std::filesystem {}
namespace fs = std::filesystem;

namespace base {

	namespace detail {

		template <class T>
		struct Point {
			T x;
			T y;
		};

		template <class T>
		struct Size {
			T width;
			T height;

			constexpr usize Linear() const { return width * height; }
		};

		template <class T>
		struct Rect {
			T x;
			T y;
			T width;
			T height;

			// constexpr Rect(T x, T y, T w, T h) : x(x), y(y), width(w), height(h) {}

			// constexpr Rect() = default;

			// constexpr explicit Rect(Size<T> size) : x(0), y(0), width(size.width), height(size.height) {}

			/**
			 * Get the origin coordinate as a point.
			 * \return a Point<T> with the origin.
			 */
			constexpr auto GetOrigin() const { return Point<T> { .x = x, .y = y }; }

			/**
			 * Get the size of this rect.
			 * \return a Point<T> which contains the calculated size of the rect
			 */
			constexpr auto GetSize() const { return Size<T> { .width = width, .height = height }; }

			constexpr bool InBounds(const Rect& other) {
				if(x < other.x || x + other.width > other.x + other.width)
					return false;

				if(y < other.y || x + other.height > other.y + other.height)
					return false;

				return true;
			}

			// more methods.
		};

	} // namespace detail

	union Pixel {
		u32 raw;

		/// color accessors
		struct {
			u8 r;
			u8 g;
			u8 b;
			u8 a;
		};

		constexpr static Pixel FromRgb565(u16 pixel) {
			return Pixel { .r = static_cast<u8>(((pixel & 0xF800) >> 11) << 3),
						   .g = static_cast<u8>(((pixel & 0x7E0) >> 5) << 2),
						   .b = static_cast<u8>((pixel & 0x1F) << 3),
						   .a = 255 };
		}
	};

	using detail::Point;
	using detail::Rect;
	using detail::Size;

	template <class T>
	using Ref = std::shared_ptr<T>;

	template <class T, class Deleter = std::default_delete<T>>
	using Unique = std::unique_ptr<T, Deleter>;

	template <typename... Ts>
	struct OverloadVisitor : Ts... {
		using Ts::operator()...;
	};

	template <class... Ts>
	OverloadVisitor(Ts...) -> OverloadVisitor<Ts...>;

	template <class T, auto* Free>
	struct UniqueCDeleter {
		constexpr void operator()(T* ptr) {
			if(ptr)
				Free(reinterpret_cast<void*>(ptr));
		}
	};

	/// Use this for wrapping a C-allocated memory block. The defaults here assume
	/// you're wrapping data allocated by malloc(), however, any deallocator pattern
	/// is basically supported.
	template <class T, auto Free = std::free>
	using CUnique = base::Unique<T, UniqueCDeleter<T, Free>>;

} // namespace base