asn1writer.h

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// OSB library ************************************************ -*- C++ -*-
/*
  AUTHOR(S): Stephan Broennimann (vb)

  RCS information
   $Name: OSB_060808 $
   $Revision: 1.1 $

  License
   OSB rating and billing library for communication networks
   Copyright (C) 2004, 2005, 2006  OSB systems

   This file may be distributed and/or modify under the terms of the
   GNU General Public License (GPL) as published by the Free Software
   Foundation which is provided in the file LICENSE.GPL included in the
   packaging of this file.

   The file is distributed in the hope that it will be useful, but WITHOUT
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   for more details.

   Holders of a OSB Commercial License may use this file under the terms
   and conditions of this commercial license.
 */
#ifndef _ASN1WRITER_H_
#define _ASN1WRITER_H_

// ************************************************************************
// included header files
// + standard includes
#include <list>

// + libraries

// + local headers
#include "asn1.h"

// + class declarations
namespace OSB_LIB {
    class Asn1Encoder;                  // asn1encode.h
    class Asn1DataEncoder;              // asn1encode.h
}

// ************************************************************************
// namespace extensions
namespace OSB_LIB {

// ************************************************************************
// forward declarations
    class Asn1Buffer;

// ************************************************************************
// type definitions

// ************************************************************************
// class definitions
    class Asn1BufferCache {
        typedef std::list<Asn1Buffer*> Buffers;

        friend class Asn1Buffer;

    public:
        Asn1BufferCache();
        ~Asn1BufferCache();

    private:
        Asn1BufferCache(const Asn1BufferCache&);
        Asn1BufferCache& operator=(const Asn1BufferCache&);

    private:
        Asn1Buffer* get();
        void put(Asn1Buffer* buf);

    private:
        bool indtor_;
        Buffers pool_;
    };                                  // class Asn1BufferCache

    class Asn1Buffer {
        friend class Asn1Writer;
        friend class Asn1BufferCache;
        typedef std::list<Asn1Buffer*> Members;
    public:
        Asn1Buffer(Asn1BufferCache& cache);
        void destroy();
    private:
        ~Asn1Buffer();
    private:
        Asn1Buffer(const Asn1Buffer&);
        Asn1Buffer& operator=(const Asn1Buffer&);
    public:
        void add(
            const Asn1Encoder& encoder,
                  bool         force = false
        );

        void add(
            const Asn1DataEncoder& encoder,
                  bool             force = false
        );

        bool write(FILE* out) const;

        void clearData();
    private:
        size_t memberSize() const;

        bool getData(
            const Asn1Encoder& encoder,
                  bool         force
        );

        bool getData(
            const Asn1DataEncoder& encoder,
                  bool             force
        );

    private:
        size_t totSize_;
        Asn1Data data_;
        Members members_;

        Asn1Tag tag_;
        Asn1Len dataLen_;

        Asn1Data tagBuf_;
        Asn1BufferCache& cache_;
    };                                  // class Asn1Buffer

    class Asn1Writer {
    public:
        Asn1Writer();
    private:
        Asn1Writer(const Asn1Writer&);
        Asn1Writer& operator=(const Asn1Writer&);
    public:
        void clear();
        void encode(
            const Asn1Encoder& encoder
        );
        void encode(
            const Asn1DataEncoder& encoder
        );

        bool write(FILE* out) const;

    private:
        Asn1BufferCache cache_;
        Asn1Buffer result_;
    };                                  // class Asn1Writer
}                                       // namespace OSB_LIB

// ************************************************************************
// inline definitions
namespace OSB_LIB {
}                                       // namespace OSB_LIB
#endif                                  // #ifndef _ASN1WRITER_H_

---