ucserial.cc

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/*
 *  ucserial.cc - Serialization of usecode objects
 *
 *  Copyright (C) 2002  The Exult Team
 *
 *  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.
 */

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include "servemsg.h"
#include "ucserial.h"
#include "useval.h"
#include "utils.h"
#include "debugmsg.h"

/*

/*
 *  Read/write out data common to all objects.
 *
 *  Output: 1 if successful, else 0.
 */

template <class Serial> 
void Stack_frame_io
  (
  Serial& io,
  int& functionid,
  int& ip,
  int& call_chain,
  int& call_depth,
  int& eventid,
  int& caller_item,
  int& num_args,
  int& num_vars
  )
{
  unsigned char c = (unsigned char)Exult_server::dbg_stackframe;
  io << c << functionid << ip << call_chain << call_depth
     << eventid << caller_item << num_args << num_vars;
  // locals!
}

int Stack_frame_out
  (
  int fd,       // Socket.
  int functionid,
  int ip,
  int call_chain,
  int call_depth,
  int eventid,
  int caller_item,
  int num_args,
  int num_vars, 
  Usecode_value* locals
  )
{
  static unsigned char buf[Exult_server::maxlength];
  unsigned char *ptr = &buf[0];
  Serial_out io(ptr);
  Stack_frame_io<Serial_out>(io, functionid, ip, call_chain, call_depth,
                 eventid, caller_item, num_args, num_vars);

  int remaining = Exult_server::maxlength - (ptr - buf);
  for (int i = 0; i < num_args + num_vars; i++) {
    int vallen = locals[i].save(ptr, remaining);
    // error checking...
    ptr += vallen;
    remaining -= vallen;
  }

  return Exult_server::Send_data(fd, Exult_server::usecode_debugging, 
                   buf, ptr - buf);
  // locals!
}


bool Stack_frame_in
  (
  unsigned char *data,    // Data that was read.
  int datalen,      // Length of data.
  int& functionid,
  int& ip,
  int& call_chain,
  int& call_depth,
  int& eventid,
  int& caller_item,
  int& num_args,
  int& num_vars,
  Usecode_value*& locals
  )
{
  unsigned char *ptr = data;
  Serial_in io(ptr);
  Stack_frame_io<Serial_in>(io, functionid, ip, call_chain, call_depth,
                eventid, caller_item, num_args, num_vars);

  int remaining = datalen - (ptr - data);
  locals = new Usecode_value[num_args + num_vars];
  for (int i = 0; i < num_args + num_vars; i++) {
    unsigned char *tmpptr = ptr;
    locals[i].restore(ptr, remaining);
    // error checking...
    remaining -= (ptr - tmpptr);
  }


  return (ptr - data) == datalen;
  // locals!
}

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