1	#ifndef DEBUG_H
    2	#define DEBUG_H 1
    3	
    4	#define LOG_TRACE 10
    5	#define LOG_ALL 7
    6	#define LOG_ENTER_EXIT 6
    7	#define LOG_DEBUG 5
    8	#define LOG_INFO 4
    9	#define LOG_WARN 3
   10	#define LOG_ERROR 2
   11	#define LOG_FATAL 1
   12	#define LOG_NONE 0
   13	
   14	#define TRACE_MODEM_IN    1
   15	#define TRACE_MODEM_OUT   2
   16	#define TRACE_SERIAL_IN   4
   17	#define TRACE_SERIAL_OUT  8
   18	#define TRACE_IP_IN       16
   19	#define TRACE_IP_OUT      32
   20	
   21	#include <stdio.h>   // needed for strerror
   22	#include <string.h>  // needed for strerror
   23	#include <errno.h>   // needed for errno
   24	
   25	#if __STDC_VERSION__ < 199901L
   26	#  if __GNUC__ >= 2
   27	#    define __func__ __FUNCTION__
   28	#  else
   29	#    define __func__ "<unknown>"
   30	#  endif
   31	#endif
   32	
   33	#define LOG(a,args...) do { \
   34	                         if(a <= log_level) { \
   35	                           log_start(a); \
   36	                           fprintf(log_file,args); \
   37	                           log_end(); \
   38	                         } \
   39	                       } while(0)
   40	
   41	#define ELOG(a,args...) do { \
   42	                         if(a <= log_level) { \
   43	                           log_start(a); \
   44	                           fprintf(log_file,args); \
   45	                           fprintf(log_file," (%s)\n",strerror(errno)); \
   46	                           log_end(); \
   47	                         } \
   48	                       } while(0)
   49	
   50	#define LOG_ENTER() LOG(LOG_ENTER_EXIT,"Entering %s function",__func__);
   51	#define LOG_EXIT() LOG(LOG_ENTER_EXIT,"Exitting %s function",__func__);
   52	int log_init(void);
   53	void log_set_file(FILE *a);
   54	void log_set_level(int a);
   55	int log_get_trace_flags();
   56	void log_set_trace_flags(int a);
   57	void log_trace(int type, unsigned char *line, int len);
   58	void log_start(int level);
   59	void log_end();
   60	
   61	#endif
   62	#ifndef DEBUG_VARS
   63	#define DEBUG_VARS 1
   64	
   65	#include <stdio.h>
   66	
   67	extern int log_level;
   68	extern FILE *log_file;
   69	
   70	#endif