Refactor our SimpleIndex file format and serialization to use Pickle instead of the previously bugg…

net/disk_cache/simple/simple_util.h

 // Copyright (c) 2013 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_SIMPLE_SIMPLE_UTIL_H_
 #define NET_DISK_CACHE_SIMPLE_SIMPLE_UTIL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "net/base/net_export.h"
 
 namespace disk_cache {
 
 namespace simple_util {
 
+NET_EXPORT_PRIVATE std::string ConvertEntryHashKeyToHexString(uint64 hash_key);
+
+// |key| is the regular cache key, such as an URL.
+// Returns the Hex ascii representation of the uint64 hash_key.
+NET_EXPORT_PRIVATE std::string GetEntryHashKeyAsHexString(
+    const std::string& key);
+
+// |key| is the regular HTTP Cache key, which is a URL.
+// Returns the hash of the key as uint64.
+NET_EXPORT_PRIVATE uint64 GetEntryHashKey(const std::string& key);
+
+// Parses the |hash_key| string into a uint64 buffer.
+// |hash_key| string must be of the form: FFFFFFFFFFFFFFFF .
+NET_EXPORT_PRIVATE bool GetEntryHashKeyFromHexString(
+    const std::string& hash_key,
+    uint64* hash_key_out);
+
 // Given a |key| for a (potential) entry in the simple backend and the |index|
 // of a stream on that entry, returns the filename in which that stream would be
 // stored.
 NET_EXPORT_PRIVATE std::string GetFilenameFromKeyAndIndex(
     const std::string& key,
     int index);
 
 // Given the size of a file holding a stream in the simple backend and the size
 // of the key to an entry, returns the number of bytes in the stream.
 int32 GetDataSizeFromKeyAndFileSize(const std::string& key,
                                     int64 file_size);
 
 // Given the size of a stream in the simple backend and the size of the key to
 // an entry, returns the number of bytes in the file.
 int64 GetFileSizeFromKeyAndDataSize(const std::string& key,
                                     int32 data_size);
 
 // Given the size of a key to an entry, and an offset into a stream on that
 // entry, returns the file offset corresponding to |data_offset|.
 int64 GetFileOffsetFromKeyAndDataOffset(const std::string& key,
                                         int data_offset);
 
 }  // namespace simple_backend
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_SIMPLE_SIMPLE_UTIL_H_