// Copyright (C) 1999,2000 Bruce Guenter <bruceg@em.ca>

//

// 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

#ifndef FDBUF__H__

#define FDBUF__H__

#include "config.h"

#include <string.h>

#include <fcntl.h>

#ifdef _REENTRANT

#include <pthread.h>

#endif

#ifndef FDBUF_SIZE

#define FDBUF_SIZE 4096

#endif

class mystring;

class fdbuf 

{

public:

  enum flagbits { flag_eof=1, flag_error=2, flag_closed=4 };

  fdbuf(int fdesc, bool dc, unsigned bufsz = FDBUF_SIZE);

  ~fdbuf();

  bool error() const;

  bool closed() const;

  bool close();

#ifdef _REENTRANT

  void lock() { pthread_mutex_lock(&mutex); }

  void unlock() { pthread_mutex_unlock(&mutex); }

#else

#ifdef FDBUF_MUTEX_DEBUG

  void lock();

  void unlock();

#else

  void lock() { }

  void unlock() { }

#endif

#endif

protected:

  char* const buf;

  unsigned buflength;		// Length of the data in the buffer

  unsigned bufstart;		// Start of the data in the buffer

  unsigned offset;		// Current file read/write offset

  int errnum;			// Saved error flag

  unsigned flags;		// Status flags

  const unsigned bufsize;	// Total buffer size

  const int fd;

  const bool do_close;		// True to close on destructor

#ifdef _REENTRANT

  pthread_mutex_t mutex;

#else

#ifdef FDBUF_MUTEX_DEBUG

  unsigned mutex;

#endif

#endif

};

#include "fdbuf/fdibuf.h"

#include "fdbuf/fdobuf.h"

bool fdbuf_copy(fdibuf&, fdobuf&, bool noflush = false);

#endif // FDBUF__H__