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/*
* BIRD Library
*
* (c) 1998--2004 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_BIRDLIB_H_
#define _BIRD_BIRDLIB_H_
/* Ugly structure offset handling macros */
#define OFFSETOF(s, i) ((unsigned int)&((s *)0)->i)
#define SKIP_BACK(s, i, p) ((s *)((char *)p - OFFSETOF(s, i)))
#ifndef ALIGN
#define ALIGN(s, a) (((s)+a-1)&~(a-1))
#endif
/* Utility macros */
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
#define ABS(a) ((a)>=0 ? (a) : -(a))
#define ARRAY_SIZE(a) (sizeof(a)/sizeof(*(a)))
#ifndef NULL
#define NULL ((void *) 0)
#endif
/* Functions which don't return */
#define NORET __attribute__((noreturn))
#define UNUSED __attribute__((unused))
/* Logging and dying */
void log(char *msg, ...);
void die(char *msg, ...) NORET;
void bug(char *msg, ...) NORET;
#define L_DEBUG "\001" /* Debugging messages */
#define L_TRACE "\002" /* Protocol tracing */
#define L_INFO "\003" /* Informational messages */
#define L_REMOTE "\004" /* Remote protocol errors */
#define L_WARN "\005" /* Local warnings */
#define L_ERR "\006" /* Local errors */
#define L_AUTH "\007" /* Authorization failed etc. */
#define L_FATAL "\010" /* Fatal errors */
#define L_BUG "\011" /* BIRD bugs */
void debug(char *msg, ...); /* Printf to debug output */
/* Debugging */
#if defined(LOCAL_DEBUG) || defined(GLOBAL_DEBUG)
#define DBG(x, y...) debug(x, ##y)
#else
#define DBG(x, y...) do { } while(0)
#endif
#ifdef DEBUGGING
#define ASSERT(x) do { if (!(x)) bug("Assertion `%s' failed at %s:%d", #x, __FILE__, __LINE__); } while(0)
#else
#define ASSERT(x) do { } while(0)
#endif
/* Pseudorandom numbers */
u32 random_u32(void);
#endif
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