MemBufInputSource.hpp

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (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.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * $Id: MemBufInputSource.hpp 932889 2010-04-11 13:10:10Z borisk $
 */


#if !defined(XERCESC_INCLUDE_GUARD_MEMBUFINPUTSOURCE_HPP)
#define XERCESC_INCLUDE_GUARD_MEMBUFINPUTSOURCE_HPP

#include <xercesc/sax/InputSource.hpp>

XERCES_CPP_NAMESPACE_BEGIN

class BinInputStream;


class XMLPARSER_EXPORT MemBufInputSource : public InputSource
{
public :
    // -----------------------------------------------------------------------
    //  Constructors and Destructor
    // -----------------------------------------------------------------------


    MemBufInputSource
    (
        const   XMLByte* const  srcDocBytes
        , const XMLSize_t       byteCount
        , const XMLCh* const    bufId
        , const bool            adoptBuffer = false
        , MemoryManager* const  manager = XMLPlatformUtils::fgMemoryManager
    );

    MemBufInputSource
    (
        const   XMLByte* const  srcDocBytes
        , const XMLSize_t       byteCount
        , const char* const     bufId
        , const bool            adoptBuffer = false
        , MemoryManager* const  manager = XMLPlatformUtils::fgMemoryManager
    );

    ~MemBufInputSource();


    // -----------------------------------------------------------------------
    //  Virtual input source interface
    // -----------------------------------------------------------------------


    BinInputStream* makeStream() const;



    // -----------------------------------------------------------------------
    //  Setter methods
    // -----------------------------------------------------------------------


    void setCopyBufToStream(const bool newState);

    void resetMemBufInputSource(const   XMLByte* const  srcDocBytes
                                , const XMLSize_t       byteCount);


private :
    // -----------------------------------------------------------------------
    //  Unimplemented constructors and operators
    // -----------------------------------------------------------------------
    MemBufInputSource(const MemBufInputSource&);
    MemBufInputSource& operator=(const MemBufInputSource&);

    // -----------------------------------------------------------------------
    //  Private data members
    //
    //  fAdopted
    //      Indicates whether the buffer is adopted or not. If so, then it
    //      is destroyed when the input source is destroyed.
    //
    //  fByteCount
    //      The size of the source document.
    //
    //  fCopyBufToStream
    //      This defaults to true (the safe option), which causes it to
    //      give a copy of the buffer to any streams it creates. If you set
    //      it to false, it will allow the streams to just reference the
    //      buffer (in which case this input source must stay alive as long
    //      as the buffer is in use by the stream.)
    //
    //  fSrcBytes
    //      The source memory buffer that is being spooled from. Whether it
    //      belongs to the this input source or not is controlled by the
    //      fAdopted flag.
    // -----------------------------------------------------------------------
    bool            fAdopted;
    XMLSize_t       fByteCount;
    bool            fCopyBufToStream;
    const XMLByte*  fSrcBytes;
};


inline void MemBufInputSource::setCopyBufToStream(const bool newState)
{
    fCopyBufToStream = newState;
}

XERCES_CPP_NAMESPACE_END

#endif