[VFS] Add support for loading ZArchive files

src/xenia/vfs/devices/disc_zarchive_entry.h

@@ -0,0 +1,59 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2020 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_VFS_DEVICES_DISC_ZARCHIVE_ENTRY_H_
+#define XENIA_VFS_DEVICES_DISC_ZARCHIVE_ENTRY_H_
+
+#include <string>
+#include <vector>
+
+#include "xenia/base/mapped_memory.h"
+#include "xenia/vfs/entry.h"
+
+namespace xe {
+namespace vfs {
+
+class DiscZarchiveDevice;
+
+class DiscZarchiveEntry : public Entry {
+ public:
+  DiscZarchiveEntry(Device* device, Entry* parent, const std::string_view path,
+                    void* opaque);
+  ~DiscZarchiveEntry() override;
+
+  static std::unique_ptr<DiscZarchiveEntry> Create(Device* device,
+                                                   Entry* parent,
+                                                   const std::string_view name,
+                                                   void* opaque);
+
+  MappedMemory* mmap() const { return nullptr; }
+  size_t data_offset() const { return data_offset_; }
+  size_t data_size() const { return data_size_; }
+
+  X_STATUS Open(uint32_t desired_access, File** out_file) override;
+
+  bool can_map() const override { return false; }
+  std::unique_ptr<MappedMemory> OpenMapped(MappedMemory::Mode mode,
+                                           size_t offset,
+                                           size_t length) override;
+
+ private:
+  friend class DiscZarchiveDevice;
+  friend class DiscZarchiveFile;
+
+  void* opaque_;
+  uint32_t handle_;
+  size_t data_offset_;
+  size_t data_size_;
+};
+
+}  // namespace vfs
+}  // namespace xe
+
+#endif  // XENIA_VFS_DEVICES_DISC_ZARCHIVE_ENTRY_H_