/*
 * Copyright (c) 1996 Gunther Schadow.  All rights reserved.
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#pragma interface

#include <rpc/types.h>
#include <rpc/xdr.h>
#include <sys/types.h>
#include <unistd.h>
#include <limits.h>
#include <streambuf.h>

class Xdr: public XDR
{
 public:
  enum op_t {
    op_nocode = -1,
    op_encode = XDR_ENCODE,
    op_decode = XDR_DECODE,
    op_free   = XDR_FREE,
  };

  typedef bool_t (*codef_t)(XDR*, void *);

  Xdr(int fd,     op_t op = op_nocode);
  Xdr(streambuf*, op_t op = op_nocode);
  virtual ~Xdr();

  void flush();
  void encode();
  void decode();
  void nocode();
  void free();

  bool code(void);
  bool code(bool&);
  bool code(char&);
  bool code(short&);
  bool code(u_short&);
  bool code(int&);
  bool code(u_int&);
  bool code(long&);
  bool code(u_long&);
  bool code(float&);
  bool code(double&);

  bool code(char*&); // a XDR `string *' because char* can be NULL

  bool code_string   (char* &,               size_t max = UINT_MAX);
  bool code_bytes    (void *&, size_t &size, size_t max = UINT_MAX);
  bool code_opaque   (void  *, size_t  size);
  bool code_reference(void *&, size_t  size, codef_t);
  bool code_pointer  (void *&, size_t  size, codef_t);
  bool code_vector   (void * , size_t  size, codef_t, u_int  cnt);
  bool code_array    (void *&, size_t  size, codef_t, u_int &cnt,
		      u_int max = UINT_MAX);

# define CODEF(T) static bool \
    codef(Xdr *x, T *p) { if(p==NULL) p = new Foo; return p->code(*x); }
# define CODEFV(T) static bool \
    codef_vector(Xdr &x, T *p, u_int cnt) \
      { return x.code_vector(p, sizeof(T), (Xdr::codef_t)T::codef, cnt); }
# define CODEFA(T) static bool \
    codef_array(Xdr &x, T *&p, u_int cnt, u_int max = UINT_MAX) \
      { return x.code_array((void *&)p, sizeof(T), (Xdr::codef_t)T::codef, \
			    cnt, max); }
# define CODEF_ALL(T) CODEF(T) CODEFV(T) CODEFA(T)
};

#ifndef OUTLINE
#include "Xdr.icc"
#endif