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debug.h revision 1.2 
      1 /*	$NetBSD: debug.h,v 1.2 1999/01/10 17:19:01 christos Exp $	*/
      2 
      3 /*
      4  * Copyright 1996 John D. Polstra.
      5  * Copyright 1996 Matt Thomas <matt (at) 3am-software.com>
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *      This product includes software developed by John Polstra.
     19  * 4. The name of the author may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 /*
     35  * Support for printing debugging messages.
     36  */
     37 
     38 #ifndef DEBUG_H /* { */
     39 #define DEBUG_H 1
     40 
     41 #ifndef __GNUC__ /* { */
     42 #error "Sorry, this module relies on some GNU extensions"
     43 #endif /* } */
     44 
     45 extern void xprintf(const char *fmt, ...)
     46     __attribute__((__format__(__printf__, 1, 2)));
     47 extern void xvprintf(const char *fmt, va_list ap)
     48     __attribute__((__format__(__printf__, 1, 0)));
     49 extern void debug_printf(const char *, ...)
     50     __attribute__((__format__(__printf__, 1, 2)));
     51 extern int debug;
     52 
     53 #ifdef DEBUG /* { */
     54 #define dbg(format, args...)	debug_printf(format, ## args)
     55 #else /* } { */
     56 #define dbg(format, args...)	((void) 0)
     57 #endif /* } */
     58 
     59 #endif /* } */
     60