[ox/claw] Add Claw

deps/ox/src/ox/claw/read.cpp

@@ -0,0 +1,54 @@
+/*
+ * 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/.
+ */
+
+#include "read.hpp"
+
+namespace ox::detail {
+
+ValErr<ClawHeader> readHeader(const char *buff, std::size_t buffLen) noexcept {
+	const auto s1End = ox_strchr(buff, ';', buffLen);
+	if (!s1End) {
+		return OxError(1);
+	}
+	const auto s1Size = s1End - buff;
+	String fmt(buff, s1Size);
+	buff += s1Size + 1;
+	buffLen -= s1Size + 1;
+
+	const auto s2End = ox_strchr(buff, ';', buffLen);
+	if (!s2End) {
+		return OxError(1);
+	}
+	const auto s2Size = s2End - buff;
+	String typeName(buff, s2Size);
+	buff += s2Size + 1;
+	buffLen -= s2Size + 1;
+
+	const auto s3End = ox_strchr(buff, ';', buffLen);
+	if (!s3End) {
+		return OxError(1);
+	}
+	const auto s3Size = s3End - buff;
+	String versionStr(buff, s3Size);
+	buff += s3Size + 1;
+
+	ClawHeader hdr;
+	if (fmt == "M1") {
+		hdr.fmt = ClawFormat::Metal;
+	} else if (fmt == "O1") {
+		hdr.fmt = ClawFormat::Organic;
+	} else {
+		return OxError(1);
+	}
+	hdr.typeName = typeName;
+	hdr.typeVersion = ox_atoi(versionStr.c_str());
+	hdr.data = buff;
+	return hdr;
+}
+
+}