Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       2             :  *
       3             :  * This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #ifndef _nsCacheMetaData_h_
       8             : #define _nsCacheMetaData_h_
       9             : 
      10             : #include "nspr.h"
      11             : #include "nscore.h"
      12             : 
      13             : class nsICacheMetaDataVisitor;
      14             : 
      15             : class nsCacheMetaData {
      16             : public:
      17           0 :     nsCacheMetaData() : mBuffer(nullptr), mBufferSize(0), mMetaSize(0) { }
      18             : 
      19           0 :     ~nsCacheMetaData() {
      20           0 :         mBufferSize = mMetaSize = 0;
      21           0 :         free(mBuffer);
      22           0 :         mBuffer = nullptr;
      23           0 :     }
      24             : 
      25             :     const char *  GetElement(const char * key);
      26             : 
      27             :     nsresult      SetElement(const char * key, const char * value);
      28             : 
      29           0 :     uint32_t      Size(void) { return mMetaSize; }
      30             : 
      31             :     nsresult      FlattenMetaData(char * buffer, uint32_t bufSize);
      32             : 
      33             :     nsresult      UnflattenMetaData(const char * buffer, uint32_t bufSize);
      34             : 
      35             :     nsresult      VisitElements(nsICacheMetaDataVisitor * visitor);
      36             : 
      37             : private:
      38             :     nsresult      EnsureBuffer(uint32_t size);
      39             : 
      40             :     char *        mBuffer;
      41             :     uint32_t      mBufferSize;
      42             :     uint32_t      mMetaSize;
      43             : };
      44             : 
      45             : #endif // _nsCacheMetaData_h