/*
 * Copyright (c) 1995, 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.
 */
#include "pg_config.h"

IDENT("@(#) Code.cc (Gunther Schadow) 12/19/96");

#pragma implementation "Code.h"

#include "Code.h"
#include "DataTypeCode.h"
#include "logfile.h"
#include "exception.h"
#include "misc.h"
#include "xios.h"
#include "ioext.h"

Code::Code()
     : Primtype(DataTypeCode::IDval)
{}

result Code::input(istream& is)
{
  if(isdebug(is))
    FATAL("can't read from a debug stream");
  
  char *sbuf = clws(trws(gets(is, getdel(is))));
      
  LOGDEBUG("got `%s'", sbuf);

  if (*sbuf == 0)
    unset();
  else
    set(sbuf);
  
  delete [] sbuf;
  
  return SUCCESS;
}

void Code::output(ostream& os) const
{
  if(ishl7er(os) || isastmer(os))
    {
      LOGDEBUG("hl7/astm");

      if(ispresent())
	if(isnull())
	  os << NULLVAL;
	else
	  os << operator const char* ();
    }
  else
    {
      LOGDEBUG("debug");

      os << DSBGR0 "Code" DSBGR1;
      if(!ispresent())
	os << DSNOPS;
      else
	if(isnull())
	  os << DSNULL;
	else
	  os << DSFRST DSBQUO << operator const char *() 
	    << DSEQUO;
      os << DSEGRP;
    }
}

bool Code::operator == (const Code &x) const
{
  bool Ea = ispresent();
  bool Eb = x.ispresent();
  bool Na = isnull();
  bool Nb = x.isnull();
  
  if(Ea && Eb) // both must exist
    if(Na && Nb) // and either both are null
      return TRUE;
    else
      if(!Na && !Nb) // or both are non-null and have the same string value
	if(strcmp(operator const char *(),x.operator const char *()) == 0)
	  return TRUE;
	else              // otherwise not!
	  return FALSE;
      else
	return FALSE;
  else
    return FALSE;
}