common: Rewrite logging based on cut down citra logger (#86)

* common: Rewrite logging based on cut down Citra logger

* code: Misc fixes

* core: Bring back tls handler

* linker: Cleanup

* config: Remove log level

* logging: Enable console output by default

* core: Fix windows build

src/common/path_util.h

@@ -0,0 +1,79 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <filesystem>
+#include <vector>
+
+namespace Common::FS {
+
+enum class PathType {
+    UserDir,        // Where shadPS4 stores its data.
+    LogDir,         // Where log files are stored.
+    ScreenshotsDir, // Where screenshots are stored.
+    ShaderDir,      // Where shaders are stored.
+    App0,           // Where guest application data is stored.
+};
+
+constexpr auto PORTABLE_DIR = "user";
+
+// Sub-directories contained within a user data directory
+constexpr auto LOG_DIR = "log";
+constexpr auto SCREENSHOTS_DIR = "screenshots";
+constexpr auto SHADER_DIR = "shader";
+constexpr auto APP0_DIR = "app0";
+
+// Filenames
+constexpr auto LOG_FILE = "shad_log.txt";
+
+/**
+ * Validates a given path.
+ *
+ * A given path is valid if it meets these conditions:
+ * - The path is not empty
+ * - The path is not too long
+ *
+ * @param path Filesystem path
+ *
+ * @returns True if the path is valid, false otherwise.
+ */
+[[nodiscard]] bool ValidatePath(const std::filesystem::path& path);
+
+/**
+ * Converts a filesystem path to a UTF-8 encoded std::string.
+ *
+ * @param path Filesystem path
+ *
+ * @returns UTF-8 encoded std::string.
+ */
+[[nodiscard]] std::string PathToUTF8String(const std::filesystem::path& path);
+
+/**
+ * Gets the filesystem path associated with the PathType enum.
+ *
+ * @param user_path PathType enum
+ *
+ * @returns The filesystem path associated with the PathType enum.
+ */
+[[nodiscard]] const std::filesystem::path& GetUserPath(PathType user_path);
+
+/**
+ * Gets the filesystem path associated with the PathType enum as a UTF-8 encoded std::string.
+ *
+ * @param user_path PathType enum
+ *
+ * @returns The filesystem path associated with the PathType enum as a UTF-8 encoded std::string.
+ */
+[[nodiscard]] std::string GetUserPathString(PathType user_path);
+
+/**
+ * Sets a new filesystem path associated with the PathType enum.
+ * If the filesystem object at new_path is not a directory, this function will not do anything.
+ *
+ * @param user_path PathType enum
+ * @param new_path New filesystem path
+ */
+void SetUserPath(PathType user_path, const std::filesystem::path& new_path);
+
+} // namespace Common::FS