[ox/claw] Add Claw

deps/ox/src/ox/claw/write.hpp

@@ -0,0 +1,90 @@
+/*
+ * Copyright 2016 - 2020 gtalent2@gmail.com
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <ox/mc/write.hpp>
+#include <ox/oc/write.hpp>
+#include <ox/std/string.hpp>
+#include <ox/std/vector.hpp>
+
+#include "format.hpp"
+
+namespace ox {
+
+namespace detail {
+
+struct TypeInfoCatcher {
+
+	const char *name = nullptr;
+
+	template<typename T>
+	constexpr void setTypeInfo(const char *name = T::TypeName, int = T::Fields) noexcept {
+		this->name = name;
+	}
+
+	constexpr ox::Error field(...) noexcept {
+		return OxError(0);
+	}
+
+};
+
+template<typename T>
+[[nodiscard]] constexpr int getTypeVersion(int version = T::TypeVersion) noexcept {
+	return version;
+}
+
+[[nodiscard]] constexpr int getTypeVersion(...) noexcept {
+	return -1;
+}
+
+template<typename T>
+constexpr const char *getTypeName(T *t) noexcept {
+	TypeInfoCatcher tnc;
+	model(&tnc, t);
+	return tnc.name;
+}
+
+template<typename T>
+ValErr<String> writeClawHeader(T *t, ClawFormat fmt) noexcept {
+	String out;
+	switch (fmt) {
+		case ClawFormat::Metal:
+			out += "M1;";
+			break;
+		case ClawFormat::Organic:
+			out += "O1;";
+			break;
+		default:
+			return OxError(1);
+	}
+	out += detail::getTypeName(t);
+	out += ";";
+	const auto tn = detail::getTypeVersion(t);
+	if (tn > -1) {
+		out += tn;
+	}
+	out += ";";
+	return out;
+}
+
+}
+
+template<typename T>
+constexpr ValErr<Vector<char>> writeClaw(T *t, ClawFormat fmt) {
+	auto [header, headerErr] = detail::writeClawHeader(t, fmt);
+	oxReturnError(headerErr);
+	const auto [data, dataErr] = fmt == ClawFormat::Metal ? writeMC(t) : writeOC(t);
+	oxReturnError(dataErr);
+	ox::Vector<char> out(header.len() + data.size());
+	memcpy(out.data(), header.data(), header.len());
+	memcpy(out.data() + header.len(), data.data(), data.size());
+	return out;
+}
+
+}