michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  *
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef _nsDiskCacheEntry_h_
michael@0: #define _nsDiskCacheEntry_h_
michael@0: 
michael@0: #include "nsDiskCacheMap.h"
michael@0: 
michael@0: #include "nsCacheEntry.h"
michael@0: 
michael@0: 
michael@0: /******************************************************************************
michael@0:  *  nsDiskCacheEntry
michael@0:  *****************************************************************************/
michael@0: struct nsDiskCacheEntry {
michael@0:     uint32_t        mHeaderVersion; // useful for stand-alone metadata files
michael@0:     uint32_t        mMetaLocation;  // for verification
michael@0:     int32_t         mFetchCount;
michael@0:     uint32_t        mLastFetched;
michael@0:     uint32_t        mLastModified;
michael@0:     uint32_t        mExpirationTime;
michael@0:     uint32_t        mDataSize;
michael@0:     uint32_t        mKeySize;       // includes terminating null byte
michael@0:     uint32_t        mMetaDataSize;  // includes terminating null byte
michael@0:     // followed by key data (mKeySize bytes)
michael@0:     // followed by meta data (mMetaDataSize bytes)
michael@0: 
michael@0:     uint32_t        Size()    { return sizeof(nsDiskCacheEntry) + 
michael@0:                                     mKeySize + mMetaDataSize;
michael@0:                               }
michael@0: 
michael@0:     char*           Key()     { return reinterpret_cast<char*const>(this) + 
michael@0:                                     sizeof(nsDiskCacheEntry);
michael@0:                               }
michael@0: 
michael@0:     char*           MetaData()
michael@0:                               { return Key() + mKeySize; }
michael@0: 
michael@0:     nsCacheEntry *  CreateCacheEntry(nsCacheDevice *  device);
michael@0: 
michael@0:     void Swap()         // host to network (memory to disk)
michael@0:     {
michael@0: #if defined(IS_LITTLE_ENDIAN)   
michael@0:         mHeaderVersion      = htonl(mHeaderVersion);
michael@0:         mMetaLocation       = htonl(mMetaLocation);
michael@0:         mFetchCount         = htonl(mFetchCount);
michael@0:         mLastFetched        = htonl(mLastFetched);
michael@0:         mLastModified       = htonl(mLastModified);
michael@0:         mExpirationTime     = htonl(mExpirationTime);
michael@0:         mDataSize           = htonl(mDataSize);
michael@0:         mKeySize            = htonl(mKeySize);
michael@0:         mMetaDataSize       = htonl(mMetaDataSize);
michael@0: #endif
michael@0:     }
michael@0:     
michael@0:     void Unswap()       // network to host (disk to memory)
michael@0:     {
michael@0: #if defined(IS_LITTLE_ENDIAN)
michael@0:         mHeaderVersion      = ntohl(mHeaderVersion);
michael@0:         mMetaLocation       = ntohl(mMetaLocation);
michael@0:         mFetchCount         = ntohl(mFetchCount);
michael@0:         mLastFetched        = ntohl(mLastFetched);
michael@0:         mLastModified       = ntohl(mLastModified);
michael@0:         mExpirationTime     = ntohl(mExpirationTime);
michael@0:         mDataSize           = ntohl(mDataSize);
michael@0:         mKeySize            = ntohl(mKeySize);
michael@0:         mMetaDataSize       = ntohl(mMetaDataSize);
michael@0: #endif
michael@0:     }
michael@0: };
michael@0: 
michael@0: 
michael@0: /******************************************************************************
michael@0:  *  nsDiskCacheEntryInfo
michael@0:  *****************************************************************************/
michael@0: class nsDiskCacheEntryInfo : public nsICacheEntryInfo {
michael@0: public:
michael@0:     NS_DECL_ISUPPORTS
michael@0:     NS_DECL_NSICACHEENTRYINFO
michael@0: 
michael@0:     nsDiskCacheEntryInfo(const char * deviceID, nsDiskCacheEntry * diskEntry)
michael@0:         : mDeviceID(deviceID)
michael@0:         , mDiskEntry(diskEntry)
michael@0:     {
michael@0:     }
michael@0: 
michael@0:     virtual ~nsDiskCacheEntryInfo() {}
michael@0:     
michael@0:     const char* Key() { return mDiskEntry->Key(); }
michael@0:     
michael@0: private:
michael@0:     const char *        mDeviceID;
michael@0:     nsDiskCacheEntry *  mDiskEntry;
michael@0: };
michael@0: 
michael@0: 
michael@0: #endif /* _nsDiskCacheEntry_h_ */