netwerk/cache/nsCacheMetaData.h
author Sylvestre Ledru <sledru@mozilla.com>
Thu, 06 Jul 2017 14:00:35 +0200
changeset 418830 6a629adbb62a299d7208373d1c6f375149d2afdb
parent 268076 b5d54a547bdca5d76cb338d430829caaeadeb2aa
child 508163 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1378712 - Remove all trailing whitespaces r=Ehsan MozReview-Commit-ID: Kdz2xtTF9EG

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef _nsCacheMetaData_h_
#define _nsCacheMetaData_h_

#include "nspr.h"
#include "nscore.h"

class nsICacheMetaDataVisitor;

class nsCacheMetaData {
public:
    nsCacheMetaData() : mBuffer(nullptr), mBufferSize(0), mMetaSize(0) { }

    ~nsCacheMetaData() {
        mBufferSize = mMetaSize = 0;
        free(mBuffer);
        mBuffer = nullptr;
    }

    const char *  GetElement(const char * key);

    nsresult      SetElement(const char * key, const char * value);

    uint32_t      Size(void) { return mMetaSize; }

    nsresult      FlattenMetaData(char * buffer, uint32_t bufSize);

    nsresult      UnflattenMetaData(const char * buffer, uint32_t bufSize);

    nsresult      VisitElements(nsICacheMetaDataVisitor * visitor);

private:
    nsresult      EnsureBuffer(uint32_t size);

    char *        mBuffer;
    uint32_t      mBufferSize;
    uint32_t      mMetaSize;
};

#endif // _nsCacheMetaData_h