/*------------------------------------------------------------------------
 *  Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
 *
 *  This file is part of the ZBar Bar Code Reader.
 *
 *  The ZBar Bar Code Reader is free software; you can redistribute it
 *  and/or modify it under the terms of the GNU Lesser Public License as
 *  published by the Free Software Foundation; either version 2.1 of
 *  the License, or (at your option) any later version.
 *
 *  The ZBar Bar Code Reader 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 Lesser Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser Public License
 *  along with the ZBar Bar Code Reader; if not, write to the Free
 *  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 *  Boston, MA  02110-1301  USA
 *
 *  http://sourceforge.net/projects/zbar
 *------------------------------------------------------------------------*/

/* varargs variations on compile time debug spew */

#include <stdio.h>

#ifndef DEBUG_LEVEL

#ifdef __GNUC__
/* older versions of gcc (< 2.95) require a named varargs parameter */
#define dbprintf(args...) while (0)
#else
/* unfortunately named vararg parameter is a gcc-specific extension */
#define dbprintf(...) while (0)
#endif

#else

#ifdef __GNUC__
#define dbprintf(level, args...)    \
    do {                            \
	if ((level) <= DEBUG_LEVEL) \
	    fprintf(stderr, args);  \
    } while (0)
#else
#define dbprintf(level, ...)              \
    do {                                  \
	if ((level) <= DEBUG_LEVEL)       \
	    fprintf(stderr, __VA_ARGS__); \
    } while (0)
#endif

#endif /* DEBUG_LEVEL */

/* spew warnings for non-fatal assertions.
 * returns specified error code if assertion fails.
 * NB check/return is still performed for NDEBUG
 * only the message is inhibited
 * FIXME don't we need varargs hacks here?
 */
#ifndef NDEBUG

#include <stdio.h>

#if __STDC_VERSION__ < 199901L && !defined(__func__)
#if __GNUC__ >= 2
#define __func__ __FUNCTION__
#else
#define __func__ "<unknown>"
#endif
#endif

#define zassert(condition, retval, format, ...)                               \
    do {                                                                      \
	if (!(condition)) {                                                   \
	    fprintf(stderr,                                                   \
		    "WARNING: %s:%d: %s:"                                     \
		    " Assertion \"%s\" failed.\n\t" format,                   \
		    __FILE__, __LINE__, __func__, #condition, ##__VA_ARGS__); \
	    return (retval);                                                  \
	}                                                                     \
    } while (0)

#else

#define zassert(condition, retval, format, ...) \
    do {                                        \
	if (!(condition))                       \
	    return (retval);                    \
    } while (0)

#endif
