Disk cache v3: The main index table.

net/disk_cache/addr.h

 // Copyright (c) 2012 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.
 
 // This is an internal class that handles the address of a cache record.
 // See net/disk_cache/disk_cache.h for the public interface of the cache.
 
 #ifndef NET_DISK_CACHE_ADDR_H_
 #define NET_DISK_CACHE_ADDR_H_
 
@@ skipping 98 matching lines @@
   }
 
   static Addr FromEntryAddress(uint32 value) {
     return Addr(kInitializedMask + (BLOCK_ENTRIES << kFileTypeOffset) + value);
   }
 
   static Addr FromEvictedAddress(uint32 value) {
     return Addr(kInitializedMask + (BLOCK_EVICTED << kFileTypeOffset) + value);
   }
 
+  // Returns the part of the address that could be stored by the index.
+  uint32 ToIndexEntryAddress() const {
+    return value_ & (kFileSelectorMask | kStartBlockMask);
+  }
+
   static int BlockSizeForFileType(FileType file_type) {
     switch (file_type) {
       case RANKINGS:
         return 36;
       case BLOCK_256:
         return 256;
       case BLOCK_1K:
         return 1024;
       case BLOCK_4K:
         return 4096;
@@ skipping 46 matching lines @@
   static const uint32 kFileSelectorOffset = 16;
   static const uint32 kStartBlockMask     = 0x0000FFFF;
   static const uint32 kFileNameMask       = 0x0FFFFFFF;
 
   CacheAddr value_;
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_ADDR_H_