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 _nsCacheMetaData_h_
michael@0: #define _nsCacheMetaData_h_
michael@0: 
michael@0: #include "nspr.h"
michael@0: #include "nscore.h"
michael@0: 
michael@0: class nsICacheMetaDataVisitor;
michael@0: 
michael@0: class nsCacheMetaData {
michael@0: public:
michael@0:     nsCacheMetaData() : mBuffer(nullptr), mBufferSize(0), mMetaSize(0) { }
michael@0: 
michael@0:     ~nsCacheMetaData() {
michael@0:         mBufferSize = mMetaSize = 0;  
michael@0:         moz_free(mBuffer);
michael@0:         mBuffer = nullptr;
michael@0:     }
michael@0: 
michael@0:     const char *  GetElement(const char * key);
michael@0: 
michael@0:     nsresult      SetElement(const char * key, const char * value);
michael@0: 
michael@0:     uint32_t      Size(void) { return mMetaSize; }
michael@0: 
michael@0:     nsresult      FlattenMetaData(char * buffer, uint32_t bufSize);
michael@0: 
michael@0:     nsresult      UnflattenMetaData(const char * buffer, uint32_t bufSize);
michael@0: 
michael@0:     nsresult      VisitElements(nsICacheMetaDataVisitor * visitor);
michael@0: 
michael@0: private:
michael@0:     nsresult      EnsureBuffer(uint32_t size);
michael@0: 
michael@0:     char *        mBuffer;
michael@0:     uint32_t      mBufferSize;
michael@0:     uint32_t      mMetaSize;
michael@0: };
michael@0: 
michael@0: #endif // _nsCacheMetaData_h