[WIP] Provided file system from NACL.

ppapi/examples/filesystem_provider/inode.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef INODE_H_
+#define INODE_H_
+
+#include <map>
+#include <string>
+#include <vector>
+
+namespace filesystem{
+//"Thu Apr 24 00:46:52 UTC 2014"
+class BookKeeper;
+
+class Inode{
+public:
+  typedef enum{
+    FILE_TYPE_UNKNOWN = 0,
+    FILE_TYPE_FILE,
+    FILE_TYPE_DIR,
+  }FILE_TYPE;
+  typedef enum{
+    NO_INODE = 0
+  }Inode_Type;
+  Inode(
+    unsigned long long appointed_inode, int file_type,
+    const std::string& inode_modified = "",const std::string& file_modified="",
+    const std::string& file_access="");
+  virtual ~Inode();
+  // Accessors and mutators
+  void set_inode_number( unsigned long long inode );
+  unsigned long long inode_number() const;
+  void set_file_type(int type);
+  int  file_type() const;
+  void set_file_access(const std::string& file_access = "");
+  std::string file_access() const;
+  void set_file_modified(const std::string& file_modified = "");
+  std::string file_modified() const;
+  void set_inode_modified(const std::string& inode_modified = "");
+  std::string inode_modified() const;
+  virtual unsigned long long size() const { return 0; }
+  static std::string CurentTime();
+protected:
+  // Unique ID for the inode
+  unsigned long long inode_number_;
+  // One of the FILE_TYPE enum
+  int file_type_;
+  // Containers for timestamps
+  std::string file_access_;
+  std::string file_modified_;
+  std::string inode_modified_;
+};
+
+class InodeFile : public Inode{
+ public:
+  InodeFile(
+    unsigned long long appointed_inode,
+    std::string inode_modified = "",
+    std::string file_modified = "",
+    std::string file_access = "");
+  virtual ~InodeFile();
+  virtual unsigned long long size() const { return data_.size(); }
+  bool Truncate(const size_t length );
+  bool Write(const char *data, uint64_t offset, uint64_t dataSize );
+  bool Read(size_t offset, size_t* inOutLen, const char** outData ) const ;
+ protected:
+  // Payload holder
+  std::string data_;
+};
+
+class InodeDirectory : public Inode{
+ public:
+  typedef std::pair< std::string, unsigned long long > EntryPair;
+  // Operations that manipulate
+  // entries_ list.
+  unsigned long long GetInodeFromName(const std::string& name);
+  void AddEntry(const std::string& name, unsigned long long inode);
+  void DeleteEntry(const std::string& name, unsigned long long inode);
+  // Gets all inodes from entries_
+  void GetAllInodes(std::vector<EntryPair>& inodes) ;
+  virtual unsigned long long size() const { return 0; }
+
+  InodeDirectory(
+    BookKeeper* bookKeeper,
+    unsigned long long appointed_inode,
+    std::string inode_modified = "", std::string file_modified = "",
+    std::string file_access = "");
+
+  virtual ~InodeDirectory();
+ protected:
+  typedef std::map< std::string, unsigned long long > ListOfEntries;
+  typedef ListOfEntries::iterator ListOfEntriesIterator;
+  ListOfEntries entries_;
+  BookKeeper *book_keeper_;
+
+};
+
+}// namespace filesystem
+
+#endif // INODE_H_