gecko/netwerk/cache/nsCacheSession.h

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is nsCacheSession.h, released
 * February 23, 2001.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Gordon Sheridan <gordon@netscape.com>
 *   Patrick Beard   <beard@netscape.com>
 *   Darin Fisher    <darin@netscape.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef _nsCacheSession_h_
#define _nsCacheSession_h_

#include "nspr.h"
#include "nsError.h"
#include "nsICacheSession.h"
#include "nsString.h"

class nsCacheSession : public nsICacheSession
{
public:
    NS_DECL_ISUPPORTS
    NS_DECL_NSICACHESESSION
    
    nsCacheSession(const char * clientID, nsCacheStoragePolicy storagePolicy, PRBool streamBased);
    virtual ~nsCacheSession();
    
    nsCString *           ClientID()      { return &mClientID; }

    enum SessionInfo {
        eStoragePolicyMask        = 0x000000FF,
        eStreamBasedMask          = 0x00000100,
        eDoomEntriesIfExpiredMask = 0x00001000
    };

    void   MarkStreamBased()  { mInfo |=  eStreamBasedMask; }
    void   ClearStreamBased() { mInfo &= ~eStreamBasedMask; }
    PRBool IsStreamBased()    { return (mInfo & eStreamBasedMask) != 0; }

    void   MarkDoomEntriesIfExpired()  { mInfo |=  eDoomEntriesIfExpiredMask; }
    void   ClearDoomEntriesIfExpired() { mInfo &= ~eDoomEntriesIfExpiredMask; }
    PRBool WillDoomEntriesIfExpired()  { return (0 != (mInfo & eDoomEntriesIfExpiredMask)); }

    nsCacheStoragePolicy  StoragePolicy()
    {
        return (nsCacheStoragePolicy)(mInfo & eStoragePolicyMask);
    }

    void SetStoragePolicy(nsCacheStoragePolicy policy)
    {
        NS_ASSERTION(policy <= 0xFF, "too many bits in nsCacheStoragePolicy");
        mInfo &= ~eStoragePolicyMask; // clear storage policy bits
        mInfo |= policy;
    }

private:
    nsCString               mClientID;
    PRUint32                mInfo;
};

#endif // _nsCacheSession_h_