implement appended zip loader for executable

openVulkanoCpp/Host/Linux/ExeAppendedZipLoaderLinux.cpp

@@ -0,0 +1,30 @@
+/*
+ * 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 https://mozilla.org/MPL/2.0/.
+ */
+
+#include "ExeAppendedZipLoaderLinux.hpp"
+#include <unistd.h>
+#include <climits>
+
+namespace OpenVulkano
+{
+	namespace
+	{
+		void* HANDLE = ResourceLoader::RegisterResourceLoader(std::make_unique<ExeAppendedZipLoaderLinux>());
+	}
+
+	std::string OpenVulkano::ExeAppendedZipLoaderLinux::GetCurrentExecutablePath() const
+	{
+		char dest[PATH_MAX];
+		memset(dest, 0, sizeof(dest)); // readlink does not null terminate!
+		size_t sz = 0;
+		if ((sz = readlink("/proc/self/exe", dest, PATH_MAX)) != -1)
+		{
+			return std::string(dest, sz);
+		}
+		return "";
+	}
+
+}

openVulkanoCpp/Host/Linux/ExeAppendedZipLoaderLinux.hpp

@@ -0,0 +1,18 @@
+/*
+ * 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 https://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include "Host/ExeAppendedZipLoader.hpp"
+
+namespace OpenVulkano
+{
+	class ExeAppendedZipLoaderLinux final : public ExeAppendedZipLoader
+	{
+	public:
+		std::string GetCurrentExecutablePath() const override;
+	};
+}