Issue 5183 - remove synchronous FileSystem interface and stop exposing of DefaultFileSystem

include/AdblockPlus/FileSystem.h

-/*
- * This file is part of Adblock Plus <https://adblockplus.org/>,
- * Copyright (C) 2006-2017 eyeo GmbH
- *
- * Adblock Plus is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 3 as
- * published by the Free Software Foundation.
- *
- * Adblock Plus is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef ADBLOCK_PLUS_FILE_SYSTEM_H
-#define ADBLOCK_PLUS_FILE_SYSTEM_H
-
-#include <istream>
-#include <stdint.h>
-#include <string>
-#include <memory>
-
-#include "IFileSystem.h"
-
-namespace AdblockPlus
-{
-  /**
-   * File system interface.
-   */
-  class FileSystem
-  {
-  public:
-    virtual ~FileSystem() {}
-
-    /**
-     * Reads from a file.
-     * @param path File path.
-     * @return Buffer with the file content.
-     */
-    virtual IFileSystem::IOBuffer Read(const std::string& path) const = 0;
-
-    /**
-     * Writes to a file.
-     * @param path File path.
-     * @param data Buffer with the data to write.
-     */
-    virtual void Write(const std::string& path,
-                       const IFileSystem::IOBuffer& data) = 0;
-
-    /**
-     * Moves a file (i.e.\ renames it).
-     * @param fromPath Current path to the file.
-     * @param toPath New path to the file.
-     */
-    virtual void Move(const std::string& fromPath,
-                      const std::string& toPath) = 0;
-
-    /**
-     * Removes a file.
-     * @param path File path.
-     */
-    virtual void Remove(const std::string& path) = 0;
-
-    /**
-     * Retrieves information about a file.
-     * @param path File path.
-     * @return File information.
-     */
-    virtual IFileSystem::StatResult Stat(const std::string& path) const = 0;
-
-    /**
-     * Returns the absolute path to a file.
-     * @param path File path (can be relative or absolute).
-     * @return Absolute file path.
-     */
-    virtual std::string Resolve(const std::string& path) const = 0;
-  };
-
-  /**
-   * Shared smart pointer to a `FileSystem` instance.
-   */
-  typedef std::shared_ptr<FileSystem> FileSystemSyncPtr;
-}
-
-#endif