zstream.h

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// Copyright (C) 1999-2003 Open Source Telecom Corporation.
//  
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
// 
// This program 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.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software 
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// 
// As a special exception to the GNU General Public License, permission is 
// granted for additional uses of the text contained in its release 
// of Common C++.
// 
// The exception is that, if you link the Common C++ library with other
// files to produce an executable, this does not by itself cause the
// resulting executable to be covered by the GNU General Public License.
// Your use of that executable is in no way restricted on account of
// linking the Common C++ library code into it.
//
// This exception does not however invalidate any other reasons why
// the executable file might be covered by the GNU General Public License.
// 
// This exception applies only to the code released under the 
// name Common C++.  If you copy code from other releases into a copy of
// Common C++, as the General Public License permits, the exception does
// not apply to the code that you add in this way.  To avoid misleading
// anyone as to the status of such modified files, you must delete
// this exception notice from them.
// 
// If you write modifications of your own for Common C++, it is your choice
// whether to permit this exception to apply to your modifications.
// If you do not wish that, delete this exception notice.

#ifndef CCXX_ZSTREAM_H_
#define CCXX_ZSTREAM_H_

#ifndef CCXX_MISSING_H_
#include <cc++/missing.h>
#endif

#ifndef CCXX_THREAD_H_
#include <cc++/thread.h>
#endif

#ifndef CCXX_STRING_H_
#include <cc++/string.h>
#endif

#ifndef CCXX_EXCEPTION_H_
#include <cc++/exception.h>
#endif

#include <zlib.h>

#ifdef  CCXX_NAMESPACES
namespace ost {
#endif

#ifdef  COMMON_STD_EXCEPTION

class __EXPORT IOZException : public IOException
{
public:
        IOZException(const String &str) : IOException(str) {};
};

#endif

class __EXPORT IZStream : protected std::streambuf, public std::istream
{
private:
        gzFile fp;
        int doallocate();
        bool throwflag;

protected:
        size_t bufsize;
        char *gbuf;

        void allocate(size_t size);

        int underflow();

        int uflow();

public:
        IZStream(bool throwflag = false);
        IZStream(const char *name, size_t size = 512, bool tf = false);

        bool isOpen(void);

        void close(void);

        virtual ~IZStream();
        
        void open(const char *name, size_t size = 512);

        inline size_t getBufferSize(void)
                {return bufsize;};
};

class __EXPORT OZStream : protected std::streambuf, public std::ostream
{
private:
        gzFile fp;
        int doallocate();
        bool throwflag;

protected:
        size_t bufsize;
        char *pbuf;

        void allocate(size_t size);

        int overflow(int ch);

public:
        OZStream(bool throwflag = false);
        OZStream(const char *name, int level = Z_DEFAULT_COMPRESSION, size_t size = 512, bool tf = false);

        bool isOpen(void);

        void close(void);

        virtual ~OZStream();
        
        void open(const char *name, int level = Z_DEFAULT_COMPRESSION, size_t size = 512);

        inline size_t getBufferSize(void)
                {return bufsize;};
};

#ifdef  CCXX_NAMESPACES
}
#endif

#endif

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