+ SubFolder(Folder &parent, const std::string &path);
+
+ virtual void Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code);
+ virtual bool Look(const std::string &path) const;
+ virtual void Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const;
+ virtual void Find(const std::string &path, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const;
+};
+
+class UnionFolder :
+ public Folder
+{
+ private:
+ struct Reset {
+ const void *flag_;
+ std::streambuf *data_;
+ };
+
+ Folder &parent_;
+ std::set<std::string> deletes_;
+
+ std::map<std::string, std::string> remaps_;
+ mutable std::map<std::string, Reset> resets_;
+
+ std::string Map(const std::string &path) const;
+ void Map(const std::string &path, const Functor<void (const std::string &)> &code, const std::string &file, const Functor<void (const Functor<void (std::streambuf &, size_t, const void *)> &)> &save) const;
+
+ public:
+ UnionFolder(Folder &parent);
+
+ virtual void Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code);
+ virtual bool Look(const std::string &path) const;
+ virtual void Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const;
+ virtual void Find(const std::string &path, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const;
+
+ void operator ()(const std::string &from) {
+ deletes_.insert(from);
+ }
+
+ void operator ()(const std::string &from, const std::string &to) {
+ operator ()(from);
+ remaps_[to] = from;
+ }
+
+ void operator ()(const std::string &from, const void *flag, std::streambuf &data) {
+ operator ()(from);
+ auto &reset(resets_[from]);
+ reset.flag_ = flag;
+ reset.data_ = &data;
+ }
+};
+
+struct Hash {
+ uint8_t sha1_[0x14];
+ uint8_t sha256_[0x20];
+};