netwerk/cache/nsCacheMetaData.h
author John Daggett <jdaggett@mozilla.com>
Thu, 06 Nov 2014 13:42:50 +0900
changeset 240717 cc8520c640df03f245b577f005fd4dfd25e4f5eb
parent 125329 5c2f1dfa1f67a38631ff62bbe4ae658a36235649
child 268076 b5d54a547bdca5d76cb338d430829caaeadeb2aa
permissions -rw-r--r--
Bug 475891 - support unicode-range when matching userfonts (non-linux). r=jfkthame

/* -*- 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;  
        moz_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