Disk cache v3 ref2

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 90 matching lines @@
   }
 
   bool operator==(Addr other) const {
     return value_ == other.value_;
   }
 
   bool operator!=(Addr other) const {
     return value_ != other.value_;
   }
 
+  // Conversions between the address of an external file and the address of the
+  // control block of that external file.
+  Addr AsExternal() const;
+  Addr AsBlockFile() const;
+
   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 29 matching lines @@
   bool SanityCheckV3() const;
   bool SanityCheckForEntryV2() const;
   bool SanityCheckForEntryV3() const;
   bool SanityCheckForRankings() const;
 
  private:
   uint32 reserved_bits() const {
     return value_ & kReservedBitsMask;
   }
 
+  void SetFileType(FileType type);
+
   static const uint32 kInitializedMask    = 0x80000000;
   static const uint32 kFileTypeMask       = 0x70000000;
   static const uint32 kFileTypeOffset     = 28;
   static const uint32 kReservedBitsMask   = 0x0c000000;
   static const uint32 kNumBlocksMask      = 0x03000000;
   static const uint32 kNumBlocksOffset    = 24;
   static const uint32 kFileSelectorMask   = 0x00ff0000;
   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_