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1 // Copyright 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_ENTRY_FORMAT_HISTORY_H_ | |
6 #define NET_DISK_CACHE_SIMPLE_SIMPLE_ENTRY_FORMAT_HISTORY_H_ | |
7 | |
8 #include "base/basictypes.h" | |
9 #include "base/port.h" | |
10 #include "net/base/net_export.h" | |
11 | |
12 namespace disk_cache { | |
13 | |
14 namespace simplecache_v5 { | |
15 | |
16 const uint64 kSimpleInitialMagicNumber = GG_UINT64_C(0xfcfb6d1ba7725c30); | |
17 const uint64 kSimpleFinalMagicNumber = GG_UINT64_C(0xf4fa6f45970d41d8); | |
18 | |
19 // A file containing stream 0 and stream 1 in the Simple cache consists of: | |
20 // - a SimpleFileHeader. | |
21 // - the key. | |
22 // - the data from stream 1. | |
23 // - a SimpleFileEOF record for stream 1. | |
24 // - the data from stream 0. | |
25 // - a SimpleFileEOF record for stream 0. | |
26 | |
27 // A file containing stream 2 in the Simple cache consists of: | |
28 // - a SimpleFileHeader. | |
29 // - the key. | |
30 // - the data. | |
31 // - at the end, a SimpleFileEOF record. | |
32 static const int kSimpleEntryFileCount = 2; | |
33 static const int kSimpleEntryStreamCount = 3; | |
34 | |
35 struct NET_EXPORT_PRIVATE SimpleFileHeader { | |
36 SimpleFileHeader(); | |
37 | |
38 uint64 initial_magic_number; | |
39 uint32 version; | |
40 uint32 key_length; | |
41 uint32 key_hash; | |
42 }; | |
43 | |
44 struct NET_EXPORT_PRIVATE SimpleFileEOF { | |
45 enum Flags { | |
46 FLAG_HAS_CRC32 = (1U << 0), | |
47 }; | |
48 | |
49 SimpleFileEOF(); | |
50 | |
51 uint64 final_magic_number; | |
52 uint32 flags; | |
53 uint32 data_crc32; | |
54 // |stream_size| is only used in the EOF record for stream 0. | |
55 uint32 stream_size; | |
56 }; | |
57 | |
58 } // namespace simplecache_v5 | |
59 | |
60 } // namespace disk_cache | |
61 | |
62 #endif // NET_DISK_CACHE_SIMPLE_SIMPLE_ENTRY_FORMAT_HISTORY_H_ | |
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