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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* 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 _nsDiskCacheEntry_h_
#define _nsDiskCacheEntry_h_
#include "nsDiskCacheMap.h"
#include "nsCacheEntry.h"
/******************************************************************************
* nsDiskCacheEntry
*****************************************************************************/
struct nsDiskCacheEntry {
uint32_t mHeaderVersion; // useful for stand-alone metadata files
uint32_t mMetaLocation; // for verification
int32_t mFetchCount;
uint32_t mLastFetched;
uint32_t mLastModified;
uint32_t mExpirationTime;
uint32_t mDataSize;
uint32_t mKeySize; // includes terminating null byte
uint32_t mMetaDataSize; // includes terminating null byte
// followed by key data (mKeySize bytes)
// followed by meta data (mMetaDataSize bytes)
uint32_t Size() { return sizeof(nsDiskCacheEntry) +
mKeySize + mMetaDataSize;
}
char* Key() { return reinterpret_cast<char*>(this) +
sizeof(nsDiskCacheEntry);
}
char* MetaData()
{ return Key() + mKeySize; }
nsCacheEntry * CreateCacheEntry(nsCacheDevice * device);
void Swap() // host to network (memory to disk)
{
#if defined(IS_LITTLE_ENDIAN)
mHeaderVersion = htonl(mHeaderVersion);
mMetaLocation = htonl(mMetaLocation);
mFetchCount = htonl(mFetchCount);
mLastFetched = htonl(mLastFetched);
mLastModified = htonl(mLastModified);
mExpirationTime = htonl(mExpirationTime);
mDataSize = htonl(mDataSize);
mKeySize = htonl(mKeySize);
mMetaDataSize = htonl(mMetaDataSize);
#endif
}
void Unswap() // network to host (disk to memory)
{
#if defined(IS_LITTLE_ENDIAN)
mHeaderVersion = ntohl(mHeaderVersion);
mMetaLocation = ntohl(mMetaLocation);
mFetchCount = ntohl(mFetchCount);
mLastFetched = ntohl(mLastFetched);
mLastModified = ntohl(mLastModified);
mExpirationTime = ntohl(mExpirationTime);
mDataSize = ntohl(mDataSize);
mKeySize = ntohl(mKeySize);
mMetaDataSize = ntohl(mMetaDataSize);
#endif
}
};
/******************************************************************************
* nsDiskCacheEntryInfo
*****************************************************************************/
class nsDiskCacheEntryInfo : public nsICacheEntryInfo {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSICACHEENTRYINFO
nsDiskCacheEntryInfo(const char * deviceID, nsDiskCacheEntry * diskEntry)
: mDeviceID(deviceID)
, mDiskEntry(diskEntry)
{
}
const char* Key() { return mDiskEntry->Key(); }
private:
virtual ~nsDiskCacheEntryInfo() {}
const char * mDeviceID;
nsDiskCacheEntry * mDiskEntry;
};
#endif /* _nsDiskCacheEntry_h_ */
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