gecko-dev/netwerk/cache/nsCacheMetaData.h

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/* -*- 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 nsCacheMetaData.h, released
* February 22, 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>
*
* 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 _nsCacheMetaData_h_
#define _nsCacheMetaData_h_
#include "nspr.h"
#include "nscore.h"
class nsICacheMetaDataVisitor;
class nsCacheMetaData {
public:
nsCacheMetaData() : mBuffer(nsnull), mBufferSize(0), mMetaSize(0) { }
~nsCacheMetaData() {
mBufferSize = mMetaSize = 0;
PR_FREEIF(mBuffer);
}
const char * GetElement(const char * key);
nsresult SetElement(const char * key, const char * value);
PRUint32 Size(void) { return mMetaSize; }
nsresult FlattenMetaData(char * buffer, PRUint32 bufSize);
nsresult UnflattenMetaData(const char * buffer, PRUint32 bufSize);
nsresult VisitElements(nsICacheMetaDataVisitor * visitor);
private:
nsresult EnsureBuffer(PRUint32 size);
char * mBuffer;
PRUint32 mBufferSize;
PRUint32 mMetaSize;
};
#endif // _nsCacheMetaData_h