Disk cache: Interface for the sparse cache support....

net/disk_cache/entry_impl.h

 // Copyright (c) 2006-2008 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 NET_DISK_CACHE_ENTRY_IMPL_H_
 #define NET_DISK_CACHE_ENTRY_IMPL_H_
 
 #include "base/scoped_ptr.h"
 #include "net/disk_cache/disk_cache.h"
 #include "net/disk_cache/storage_block.h"
@@ skipping 15 matching lines @@
   virtual void Close();
   virtual std::string GetKey() const;
   virtual base::Time GetLastUsed() const;
   virtual base::Time GetLastModified() const;
   virtual int32 GetDataSize(int index) const;
   virtual int ReadData(int index, int offset, net::IOBuffer* buf, int buf_len,
                        net::CompletionCallback* completion_callback);
   virtual int WriteData(int index, int offset, net::IOBuffer* buf, int buf_len,
                         net::CompletionCallback* completion_callback,
                         bool truncate);
+  virtual int ReadSparseData(int64 offset, net::IOBuffer* buf, int buf_len,
+                             net::CompletionCallback* completion_callback);
+  virtual int WriteSparseData(int64 offset, net::IOBuffer* buf, int buf_len,
+                              net::CompletionCallback* completion_callback);
+  virtual int GetAvailableRange(int64 offset, int len, int64* start);
 
   inline CacheEntryBlock* entry() {
     return &entry_;
   }
 
   inline CacheRankingsBlock* rankings() {
     return &node_;
   }
 
   uint32 GetHash();
@@ skipping 97 matching lines @@
   scoped_refptr<File> files_[NUM_STREAMS + 1];  // Files to store external user
                                                 // data and key.
   int unreported_size_[NUM_STREAMS];  // Bytes not reported yet to the backend.
   bool doomed_;               // True if this entry was removed from the cache.
   DISALLOW_EVIL_CONSTRUCTORS(EntryImpl);
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_ENTRY_IMPL_H_