Precommit (#1)

* first commit

* cleanup

global/exec_dir_helper.h

@@ -0,0 +1,96 @@
+/**
+ *
+ * @file      exec_dir_helper.h
+ * @brief     This file contains helper functions e.g. filesystem
+ * @version   0.1
+ * @date      2022.11.14
+ * @author    Thomas.pfleiderer@zf.com
+ * @copyright Copyright ZF Friedrichshaven AG (c) 2022
+ *
+ */
+#ifndef EXEC_DIR_HELPER_H
+#define EXEC_DIR_HELPER_H
+
+#include <filesystem>
+#include <string>
+
+#ifdef _WIN32
+#pragma push_macro("interface")
+#undef interface
+#pragma push_macro("GetObject")
+#undef GetObject
+
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+
+#include <WinSock2.h>
+#include <Windows.h>
+#include <array>
+
+// Resolve conflict
+#pragma pop_macro("GetObject")
+#pragma pop_macro("interface")
+#ifdef GetClassInfo
+#undef GetClassInfo
+#endif
+#elif defined __linux__
+#include <linux/limits.h>
+#include <unistd.h>
+#else
+#error OS is not supported
+#endif
+
+/**
+ * @brief Get the absolute path to the currently run executable
+ * @return Absolute std::filesystem::path to the currently run executable
+ */
+inline std::filesystem::path GetExecDirectory()
+{
+    static std::filesystem::path pathExeDir;
+    if (!pathExeDir.empty()) return pathExeDir;
+#ifdef _WIN32
+    // Windows specific
+    std::wstring ssPath(32768, '\0');
+    GetModuleFileNameW(NULL, ssPath.data(), static_cast<DWORD>(ssPath.size() - 1));
+#elif defined __linux__
+    // Linux specific
+    std::string ssPath(PATH_MAX + 1, '\0');
+    const ssize_t nCount = readlink("/proc/self/exe", ssPath.data(), PATH_MAX);
+    if (nCount < 0 || nCount >= PATH_MAX)
+        return pathExeDir; // some error
+    ssPath.at(nCount) = '\0';
+#else
+#error OS is not supported!
+#endif
+    pathExeDir = std::filesystem::path{ssPath.c_str()}.parent_path() / ""; // To finish the folder path with (back)slash
+    return pathExeDir;
+}
+
+/**
+ * @brief Get the filename of the currently run executable
+ * @return The filename to the currently run executable
+ */
+inline std::filesystem::path GetExecFilename()
+{
+    static std::filesystem::path pathExeFilename;
+    if (!pathExeFilename.empty()) return pathExeFilename;
+#ifdef _WIN32
+    // Windows specific
+    std::wstring ssPath(32768, '\0');
+    GetModuleFileNameW(NULL, ssPath.data(), static_cast<DWORD>(ssPath.size() - 1));
+#elif defined __linux__
+    // Linux specific
+    std::string ssPath(PATH_MAX + 1, '\0');
+    const ssize_t nCount = readlink("/proc/self/exe", ssPath.data(), PATH_MAX);
+    if (nCount < 0 || nCount >= PATH_MAX)
+        return pathExeFilename; // some error
+    ssPath.at(nCount) = '\0';
+#else
+#error OS is not supported!
+#endif
+    pathExeFilename = std::filesystem::path{ssPath.c_str()}.filename();
+    return pathExeFilename;
+}
+
+#endif // !defined EXEC_DIR_HELPER_H