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// Copyright 2013 The Chromium Authors
// 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_ENTRY_FORMAT_HISTORY_H_
#define NET_DISK_CACHE_SIMPLE_SIMPLE_ENTRY_FORMAT_HISTORY_H_
#include <stdint.h>
#include "net/base/net_export.h"
namespace disk_cache::simplecache_v5 {
const uint64_t kSimpleInitialMagicNumber = UINT64_C(0xfcfb6d1ba7725c30);
const uint64_t kSimpleFinalMagicNumber = UINT64_C(0xf4fa6f45970d41d8);
// A file containing stream 0 and stream 1 in the Simple cache consists of:
// - a SimpleFileHeader.
// - the key.
// - the data from stream 1.
// - a SimpleFileEOF record for stream 1.
// - the data from stream 0.
// - a SimpleFileEOF record for stream 0.
// A file containing stream 2 in the Simple cache consists of:
// - a SimpleFileHeader.
// - the key.
// - the data.
// - at the end, a SimpleFileEOF record.
static const int kSimpleEntryFileCount = 2;
static const int kSimpleEntryStreamCount = 3;
struct NET_EXPORT_PRIVATE SimpleFileHeader {
SimpleFileHeader();
uint64_t initial_magic_number;
uint32_t version;
uint32_t key_length;
uint32_t key_hash;
};
struct NET_EXPORT_PRIVATE SimpleFileEOF {
enum Flags {
FLAG_HAS_CRC32 = (1U << 0),
};
SimpleFileEOF();
uint64_t final_magic_number;
uint32_t flags;
uint32_t data_crc32;
// |stream_size| is only used in the EOF record for stream 0.
uint32_t stream_size;
};
} // namespace disk_cache::simplecache_v5
#endif // NET_DISK_CACHE_SIMPLE_SIMPLE_ENTRY_FORMAT_HISTORY_H_
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