error.h

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/*
  ERROR.h  -  Lumiera Error handling interface (C-style)

  Copyright (C)         Lumiera.org
    2008,               Christian Thaeter <ct@pipapo.org>

  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 LUMIERA_ERROR_H
#define LUMIERA_ERROR_H

#ifdef __cplusplus
extern "C" {
#elif 0
} /* fixes broken emacs indenting */
#endif


#include <nobug.h>
#include <stdlib.h>


typedef const char* lumiera_err;

#define LUMIERA_DIE(err) \
  do { NOBUG_ERROR(NOBUG_ON, "Fatal Error: %s ", strchr(LUMIERA_ERROR_##err, ':')); abort(); } while(0)

#define LUMIERA_ERROR_DECLARE(err) \
extern lumiera_err const LUMIERA_ERROR_##err

#define LUMIERA_ERROR_DEFINE(err, msg) \
lumiera_err const LUMIERA_ERROR_##err = "LUMIERA_ERROR_" #err ":" msg

#define LUMIERA_ERROR_SET(flag, err, extra)                                                             \
  do {                                                                                                  \
  const char* theextra = extra;                                                                         \
  ERROR (flag, "%s%s%s", strchr(LUMIERA_ERROR_##err, ':')+1, theextra?": ":"", theextra?theextra:"");   \
  lumiera_error_set(LUMIERA_ERROR_##err, theextra);                                                     \
  } while (0)

#define LUMIERA_ERROR_SET_ALERT(flag, err, extra)                                                       \
  do {                                                                                                  \
  const char* theextra = extra;                                                                         \
  ALERT (flag, "%s%s%s", strchr(LUMIERA_ERROR_##err, ':')+1, theextra?": ":"", theextra?theextra:"");   \
  lumiera_error_set(LUMIERA_ERROR_##err, theextra);                                                     \
  } while (0)

#define LUMIERA_ERROR_SET_CRITICAL(flag, err, extra)                                                    \
  do {                                                                                                  \
  const char* theextra = extra;                                                                         \
  CRITICAL (flag, "%s%s%s", strchr(LUMIERA_ERROR_##err, ':')+1, theextra?": ":"", theextra?theextra:"");\
  lumiera_error_set(LUMIERA_ERROR_##err, theextra);                                                     \
  } while (0)

#define LUMIERA_ERROR_SET_WARNING(flag, err, extra)                                                     \
  do {                                                                                                  \
  const char* theextra = extra;                                                                         \
  WARN (flag, "%s%s%s", strchr(LUMIERA_ERROR_##err, ':')+1, theextra?": ":"", theextra?theextra:"");    \
  lumiera_error_set(LUMIERA_ERROR_##err, theextra);                                                     \
  } while (0)

lumiera_err
lumiera_error_set (lumiera_err nerr, const char* extra);

const char*
lumiera_error_extra (void);

lumiera_err
lumiera_error (void);


lumiera_err
lumiera_error_peek (void);


int
lumiera_error_expect (lumiera_err expected);


/*
  predefined errors
*/
LUMIERA_ERROR_DECLARE (ERRNO);
LUMIERA_ERROR_DECLARE (UNKNOWN);

#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* LUMIERA_ERROR_H */