/*
 * 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.
 */

#ifndef EXCEPTION_H
#define EXCEPTION_H

// Error types:
//
// 1. OS errors `ERROS' text in sys_errlist[errno] -> recover or exit
// 2. generic error not directly related to user interface -> recover or exit
// 2.1 here: protocol error -> exception/try to recover 
// 3. user error (like command line parameters wrong, etc) -> print/exit
// 4. programming errors (like impossible conditions) -> abort/core
//
// Except for programming errors, which should dump a core in orter to
// be examined, all other errors can be tried to recover from (user errors:
// using default values, protocol: going into a defined state, etc.).
// 
// Error/Exception/Warning have two `coordinates'
// 1. Message: no message, to logfile, to terminal
// 2. Control: normal flow, deviation (return/if), throw excpt., abort process
//
//    Error     (to terminal | abort process)   e.g. programming error
//    Error     (to terminal | throw exception) e.g. OS error
//    Error     (to logfile  | throw exception) e.g. protocol error
//    Exception (*           | throw exception) 
//    Warning   (to logfile  | normal flow)
//    Warning   (to terminal | normal flow)
//    Warning   (to logfile  | deviation)
//    Warning   (to terminal | deviation)
//
// However, `to terminal' and `to logfile' stand for many different ways of
// reporting (e.g. to terminal makes no sense w/o terminal, by mail, logfile
// message may be ignored (`a la syslog.conf(5)).

# define ERROR(fmt, args...) { fprintf(stderr, fmt "\n" , ## args); exit(1); }
# define ERROS(fmt, args...) { fprintf(stderr, fmt "\n" , ## args); exit(1); }
# define USERR(fmt, args...) { fprintf(stderr, fmt "\n" , ## args); exit(1); }
# define PRERR(fmt, args...) { fprintf(stderr, fmt "\n" , ## args); exit(1); }



#endif