/* * BIRD Library * * (c) 1998--2004 Martin Mares * * Can be freely distributed and used under the terms of the GNU GPL. */ #ifndef _BIRD_BIRDLIB_H_ #define _BIRD_BIRDLIB_H_ #include "timer.h" #include "alloca.h" /* Ugly structure offset handling macros */ #define OFFSETOF(s, i) ((size_t) &((s *)0)->i) #define SKIP_BACK(s, i, p) ((s *)((char *)p - OFFSETOF(s, i))) #define BIRD_ALIGN(s, a) (((s)+a-1)&~(a-1)) /* Utility macros */ #define _MIN(a,b) (((a)<(b))?(a):(b)) #define _MAX(a,b) (((a)>(b))?(a):(b)) #ifndef PARSER #undef MIN #undef MAX #define MIN(a,b) _MIN(a,b) #define MAX(a,b) _MAX(a,b) #endif #define ABS(a) ((a)>=0 ? (a) : -(a)) #define ARRAY_SIZE(a) (sizeof(a)/sizeof(*(a))) #ifndef NULL #define NULL ((void *) 0) #endif /* Macros for gcc attributes */ #define NORET __attribute__((noreturn)) #define UNUSED __attribute__((unused)) /* Microsecond time */ typedef s64 btime; #define _S *1000000 #define _MS *1000 #define _US *1 #define TO_S /1000000 #define TO_MS /1000 #define TO_US /1 #ifndef PARSER #define S _S #define MS _MS #define US _US #endif /* Logging and dying */ typedef struct buffer { byte *start; byte *pos; byte *end; } buffer; #define STACK_BUFFER_INIT(buf,size) \ do { \ buf.start = alloca(size); \ buf.pos = buf.start; \ buf.end = buf.start + size; \ } while(0) #define LOG_BUFFER_INIT(buf) \ STACK_BUFFER_INIT(buf, LOG_BUFFER_SIZE) #define LOG_BUFFER_SIZE 1024 struct rate_limit { bird_clock_t timestamp; int count; }; #define log log_msg void log_commit(int class, buffer *buf); void log_msg(char *msg, ...); void log_rl(struct rate_limit *rl, 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