/* 
 * Copyright (C) 1999, 2002, 2003, 2004, 2005, 2006 Free Software
 * Foundation, Inc.
 * 
 * This file is part of GNU libmatheval
 * 
 * GNU libmatheval 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, or (at your option) any later
 * version.
 * 
 * GNU libmatheval 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
 * program; see the file COPYING. If not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#if HAVE_CONFIG_H
#include "config.h"
#endif

#include "common.h"
#include "error.h"

const char      lib_name[] = "libmatheval";	/* Library name to be
						 * printed to standard
						 * error stream in order
						 * to locate problem
						 * source.  */

/* Issue error message to standard error stream and, if status value not
 * less than zero, terminate calling program.  Argument mode is intended
 * to describe error severity. */
static void     error_issue(int status, const char *mode,
			    const char *message);

void
error_warning(const char *message)
{
	/* Issue warning. */
	error_issue(-1, "warning", message);
}

void
error_fatal(const char *message)
{
	/* Issue error. */
	error_issue(EXIT_FAILURE, "FATAL", message);
}

static void
error_issue(int status, const char *mode, const char *message)
{
	/* Print error message. */
	fprintf(stderr, "%s: %s: %s\n", lib_name, mode, message);

	/* Check status and eventually terminate calling program. */
	if (status >= 0)
		exit(status);
}