/***************************************************************************

  error.h

  Error management

  (c) 2000-2007 Benoit Minisini <gambas@users.sourceforge.net>

  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 1, 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 __GB_ERROR_H
#define __GB_ERROR_H

#include <errno.h>
#include <setjmp.h>

#include "gb_limit.h"

#define E_MEMORY    "Out of memory"
#define E_SYNTAX    "Syntax error"

typedef
  struct {
  	short code;
    bool free;
    void *cp;
    void *fp;
    void *pc;
    //char msg[MAX_ERROR_MSG + 1];
    char *msg;
    void *backtrace;
    }
  ERROR_INFO;

typedef
  struct _ERROR {
    struct _ERROR *prev;
    jmp_buf env;
    int ret;
    ERROR_INFO info;
    }
  ERROR_CONTEXT;

#ifndef __GB_ERROR_C
EXTERN ERROR_CONTEXT *ERROR_current;
#endif

#define ERROR_LEAVE_DONE ((ERROR_CONTEXT *)-1)

#define TRY \
  { \
		ERROR_CONTEXT __err_context; \
    { \
     	ERROR_CONTEXT *__err = &__err_context; \
     	ERROR_enter(__err); \
     	__err->ret = setjmp(__err->env); \
     	if (__err->ret == 0)

#define CATCH \
			else

#define END_TRY \
			ERROR_leave(__err); \
  	} \
	}

#define ERROR __err

#define PROPAGATE() ERROR_propagate()

PUBLIC void ERROR_clear(void);
PUBLIC char *ERROR_get(void);

PUBLIC void ERROR_enter(ERROR_CONTEXT *err);
PUBLIC void ERROR_leave(ERROR_CONTEXT *err);

PUBLIC void PROPAGATE() NORETURN;
PUBLIC void THROW(const char *msg) NORETURN;
PUBLIC void THROW2(const char *pattern, const char *msg) NORETURN;

PUBLIC void ERROR_panic(const char *error, ...) NORETURN;

PUBLIC void ERROR_print(void);
PUBLIC void ERROR_print_at(FILE *where);

/*PUBLIC void ERROR_must_free(void *object);*/

#endif