[ox] Add StringView, Writer system, Preloader system

deps/ox/src/ox/preloader/platspecs.hpp

@@ -0,0 +1,126 @@
+/*
+ * Copyright 2016 - 2022 Gary Talent (gary@drinkingtea.net). All rights reserved.
+ */
+
+#pragma once
+
+#include <ox/std/serialize.hpp>
+#include <ox/std/typetraits.hpp>
+
+#include "alignmentcatcher.hpp"
+#include "sizecatcher.hpp"
+
+namespace ox {
+
+struct NativePlatSpec {
+	using PtrType = uintptr_t;
+	using size_t = std::size_t;
+
+	static constexpr auto PtrAlign = alignof(void*);
+	static constexpr PtrType RomStart = 0x08000000;
+
+	template<typename T>
+	[[nodiscard]]
+	static constexpr auto alignOf(const T &v) noexcept {
+		if constexpr(ox::is_integral_v<T>) {
+			return alignof(T);
+		} else if constexpr(ox::is_pointer_v<T>) {
+			return PtrAlign;
+		} else {
+			AlignmentCatcher<NativePlatSpec> c;
+			oxAssert(model(c.interface(), &v), "Could not get alignment for type");
+			return c.biggestAlignment;
+		}
+	}
+
+	[[nodiscard]]
+	static constexpr auto correctEndianness(auto v) noexcept {
+		return v;
+	}
+};
+
+struct GbaPlatSpec {
+	using PtrType = uint32_t;
+	using size_t = uint32_t;
+
+	static constexpr auto PtrAlign = 4;
+	static constexpr PtrType RomStart = 0x08000000;
+
+	[[nodiscard]]
+	static constexpr std::size_t alignOf(const bool) noexcept {
+		return 1;
+	}
+
+	[[nodiscard]]
+	static constexpr std::size_t alignOf(const uint8_t) noexcept {
+		return 1;
+	}
+
+	[[nodiscard]]
+	static constexpr std::size_t alignOf(const uint16_t) noexcept {
+		return 2;
+	}
+
+	[[nodiscard]]
+	static constexpr std::size_t alignOf(const uint32_t) noexcept {
+		return 4;
+	}
+
+	[[nodiscard]]
+	static constexpr std::size_t alignOf(const uint64_t) noexcept {
+		return 8;
+	}
+
+	[[nodiscard]]
+	static constexpr std::size_t alignOf(const int8_t)  noexcept {
+		return 1;
+	}
+
+	[[nodiscard]]
+	static constexpr std::size_t alignOf(const int16_t) noexcept {
+		return 2;
+	}
+
+	[[nodiscard]]
+	static constexpr std::size_t alignOf(const int32_t) noexcept {
+		return 4;
+	}
+
+	[[nodiscard]]
+	static constexpr std::size_t alignOf(const int64_t) noexcept {
+		return 8;
+	}
+
+	[[nodiscard]]
+	static constexpr std::size_t alignOf(auto*) noexcept {
+		return 4;
+	}
+
+	[[nodiscard]]
+	static constexpr std::size_t alignOf(const auto*) noexcept {
+		return 4;
+	}
+
+	[[nodiscard]]
+	static constexpr std::size_t alignOf(const auto &v) noexcept {
+		AlignmentCatcher<GbaPlatSpec> c;
+		oxAssert(model(c.interface(), &v), "Could not get alignment for type");
+		return c.biggestAlignment;
+	}
+
+	[[nodiscard]]
+	static constexpr auto correctEndianness(auto v) noexcept {
+		return ox::toLittleEndian(v);
+	}
+};
+
+template<typename PlatSpec, typename T>
+[[nodiscard]]
+constexpr std::size_t alignOf(const T &t) noexcept {
+	return PlatSpec::alignOf(t);
+}
+
+template<typename PlatSpec, typename T>
+constexpr auto alignOf_v = alignOf<PlatSpec>(static_cast<T*>(nullptr));
+
+}