1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef NET_DISK_CACHE_SIMPLE_SIMPLE_UTIL_H_ 6 #define NET_DISK_CACHE_SIMPLE_SIMPLE_UTIL_H_ 7 8 #include <string> 9 10 #include "base/basictypes.h" 11 #include "base/strings/string_piece.h" 12 #include "net/base/net_export.h" 13 14 namespace base { 15 class FilePath; 16 class Time; 17 } 18 19 namespace disk_cache { 20 21 namespace simple_util { 22 23 NET_EXPORT_PRIVATE std::string ConvertEntryHashKeyToHexString(uint64 hash_key); 24 25 // |key| is the regular cache key, such as an URL. 26 // Returns the Hex ascii representation of the uint64 hash_key. 27 NET_EXPORT_PRIVATE std::string GetEntryHashKeyAsHexString( 28 const std::string& key); 29 30 // |key| is the regular HTTP Cache key, which is a URL. 31 // Returns the hash of the key as uint64. 32 NET_EXPORT_PRIVATE uint64 GetEntryHashKey(const std::string& key); 33 34 // Parses the |hash_key| string into a uint64 buffer. 35 // |hash_key| string must be of the form: FFFFFFFFFFFFFFFF . 36 NET_EXPORT_PRIVATE bool GetEntryHashKeyFromHexString( 37 const base::StringPiece& hash_key, 38 uint64* hash_key_out); 39 40 // Given a |key| for a (potential) entry in the simple backend and the |index| 41 // of a stream on that entry, returns the filename in which that stream would be 42 // stored. 43 NET_EXPORT_PRIVATE std::string GetFilenameFromKeyAndIndex( 44 const std::string& key, 45 int index); 46 47 // Same as |GetFilenameFromKeyAndIndex| above, but using a hex string. 48 std::string GetFilenameFromEntryHashAndIndex(uint64 entry_hash, int index); 49 50 // Given the size of a file holding a stream in the simple backend and the key 51 // to an entry, returns the number of bytes in the stream. 52 NET_EXPORT_PRIVATE int32 GetDataSizeFromKeyAndFileSize(const std::string& key, 53 int64 file_size); 54 55 // Given the size of a stream in the simple backend and the key to an entry, 56 // returns the number of bytes in the file. 57 NET_EXPORT_PRIVATE int64 GetFileSizeFromKeyAndDataSize(const std::string& key, 58 int32 data_size); 59 60 // Given the key to an entry, and an offset into a stream on that entry, returns 61 // the file offset corresponding to |data_offset|. 62 NET_EXPORT_PRIVATE int64 GetFileOffsetFromKeyAndDataOffset( 63 const std::string& key, 64 int data_offset); 65 66 // Fills |out_time| with the time the file last modified time. 67 // TODO(gavinp): Remove this function. 68 NET_EXPORT_PRIVATE bool GetMTime(const base::FilePath& path, 69 base::Time* out_mtime); 70 } // namespace simple_backend 71 72 } // namespace disk_cache 73 74 #endif // NET_DISK_CACHE_SIMPLE_SIMPLE_UTIL_H_ 75