141 lines
5.1 KiB
C++
141 lines
5.1 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is nsMemoryCacheDevice.cpp, released
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* February 22, 2001.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Gordon Sheridan <gordon@netscape.com>
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* Patrick C. Beard <beard@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef _nsDiskCacheEntry_h_
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#define _nsDiskCacheEntry_h_
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#include "nsDiskCacheMap.h"
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#include "nsCacheEntry.h"
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#include "nsICacheVisitor.h"
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#include "nspr.h"
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#include "nscore.h"
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#include "nsError.h"
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/******************************************************************************
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* nsDiskCacheEntry
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*****************************************************************************/
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struct nsDiskCacheEntry {
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PRUint32 mHeaderVersion; // useful for stand-alone metadata files
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PRUint32 mMetaLocation; // for verification
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PRInt32 mFetchCount;
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PRUint32 mLastFetched;
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PRUint32 mLastModified;
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PRUint32 mExpirationTime;
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PRUint32 mDataSize;
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PRUint32 mKeySize; // includes terminating null byte
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PRUint32 mMetaDataSize; // includes terminating null byte
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char mKeyStart[1]; // start of key data
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// mMetaDataStart = mKeyStart[mKeySize];
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PRUint32 Size() { return offsetof(nsDiskCacheEntry,mKeyStart) +
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mKeySize + mMetaDataSize;
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}
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nsCacheEntry * CreateCacheEntry(nsCacheDevice * device);
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PRBool CheckConsistency(PRUint32 size);
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void Swap() // host to network (memory to disk)
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{
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#if defined(IS_LITTLE_ENDIAN)
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mHeaderVersion = ::PR_htonl(mHeaderVersion);
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mMetaLocation = ::PR_htonl(mMetaLocation);
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mFetchCount = ::PR_htonl(mFetchCount);
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mLastFetched = ::PR_htonl(mLastFetched);
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mLastModified = ::PR_htonl(mLastModified);
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mExpirationTime = ::PR_htonl(mExpirationTime);
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mDataSize = ::PR_htonl(mDataSize);
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mKeySize = ::PR_htonl(mKeySize);
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mMetaDataSize = ::PR_htonl(mMetaDataSize);
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#endif
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}
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void Unswap() // network to host (disk to memory)
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{
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#if defined(IS_LITTLE_ENDIAN)
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mHeaderVersion = ::PR_ntohl(mHeaderVersion);
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mMetaLocation = ::PR_ntohl(mMetaLocation);
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mFetchCount = ::PR_ntohl(mFetchCount);
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mLastFetched = ::PR_ntohl(mLastFetched);
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mLastModified = ::PR_ntohl(mLastModified);
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mExpirationTime = ::PR_ntohl(mExpirationTime);
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mDataSize = ::PR_ntohl(mDataSize);
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mKeySize = ::PR_ntohl(mKeySize);
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mMetaDataSize = ::PR_ntohl(mMetaDataSize);
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#endif
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}
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};
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nsDiskCacheEntry * CreateDiskCacheEntry(nsDiskCacheBinding * binding);
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/******************************************************************************
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* nsDiskCacheEntryInfo
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*****************************************************************************/
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class nsDiskCacheEntryInfo : public nsICacheEntryInfo {
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSICACHEENTRYINFO
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nsDiskCacheEntryInfo(const char * deviceID, nsDiskCacheEntry * diskEntry)
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: mDeviceID(deviceID)
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, mDiskEntry(diskEntry)
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{
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}
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virtual ~nsDiskCacheEntryInfo() {}
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const char* Key() { return mDiskEntry->mKeyStart; }
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private:
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const char * mDeviceID;
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nsDiskCacheEntry * mDiskEntry;
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};
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#endif /* _nsDiskCacheEntry_h_ */
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