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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef _nsDiskCache_h_
#define _nsDiskCache_h_
#include "nsCacheEntry.h"
#ifdef XP_WIN
# include <winsock.h> // for htonl/ntohl
#endif
class nsDiskCache {
public:
enum {
kCurrentVersion =
0x00010013 // format = 16 bits major version/16 bits minor version
};
enum { kData, kMetaData };
// Stores the reason why the cache is corrupt.
// Note: I'm only listing the enum values explicitly for easy mapping when
// looking at telemetry data.
enum CorruptCacheInfo {
kNotCorrupt = 0,
kInvalidArgPointer = 1,
kUnexpectedError = 2,
kOpenCacheMapError = 3,
kBlockFilesShouldNotExist = 4,
kOutOfMemory = 5,
kCreateCacheSubdirectories = 6,
kBlockFilesShouldExist = 7,
kHeaderSizeNotRead = 8,
kHeaderIsDirty = 9,
kVersionMismatch = 10,
kRecordsIncomplete = 11,
kHeaderIncomplete = 12,
kNotEnoughToRead = 13,
kEntryCountIncorrect = 14,
kCouldNotGetBlockFileForIndex = 15,
kCouldNotCreateBlockFile = 16,
kBlockFileSizeError = 17,
kBlockFileBitMapWriteError = 18,
kBlockFileSizeLessThanBitMap = 19,
kBlockFileBitMapReadError = 20,
kBlockFileEstimatedSizeError = 21,
kFlushHeaderError = 22,
kCacheCleanFilePathError = 23,
kCacheCleanOpenFileError = 24,
kCacheCleanTimerError = 25
};
// Parameter initval initializes internal state of hash function. Hash values
// are different for the same text when different initval is used. It can be
// any random number.
//
// It can be used for generating 64-bit hash value:
// (uint64_t(Hash(key, initval1)) << 32) | Hash(key, initval2)
//
// It can be also used to hash multiple strings:
// h = Hash(string1, 0);
// h = Hash(string2, h);
// ...
static PLDHashNumber Hash(const char* key, PLDHashNumber initval = 0);
static nsresult Truncate(PRFileDesc* fd, uint32_t newEOF);
};
#endif // _nsDiskCache_h_
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