[nostalgia] Add support for asset UUID headers

2023-02-12 00:02:41 -06:00
parent 2b821b73ff
commit 1b7b6e306e
14 changed files with 144 additions and 31 deletions
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2016 - 2023 Gary Talent (gary@drinkingtea.net). All rights reserved.
+ */
+
+#pragma once
+
+#include <ox/std/defines.hpp>
+
+#include <ox/claw/claw.hpp>
+#include <ox/fs/fs.hpp>
+
+#include <nostalgia/foundation/context.hpp>
+
+namespace nostalgia::foundation {
+
+[[nodiscard]]
+ox::Result<ox::UUID> readUuidHeader(const ox::Buffer &buff) noexcept;
+
+ox::Result<ox::UUID> readUuidHeader(const char *buff, std::size_t buffLen) noexcept;
+
+template<typename T>
+ox::Result<T> readAsset(const ox::Buffer &buff) noexcept {
+	std::size_t offset = 0;
+	const auto err = readUuidHeader(buff).error;
+	if (!err) {
+		offset = 40; // the size of N1 headers
+	}
+	return ox::readClaw<T>(buff.data() + offset, buff.size() - offset);
+}
+
+ox::Result<ox::ModelObject> readAsset(ox::TypeStore *ts, const ox::Buffer &buff) noexcept;
+
+struct AssetHdr {
+	ox::UUID uuid;
+	ox::ClawHeader clawHdr;
+};
+
+ox::Result<AssetHdr> readAssetHeader(const char *buff, std::size_t buffLen) noexcept;
+
+ox::Result<AssetHdr> readAssetHeader(const ox::Buffer &buff) noexcept;
+
+}