log.h

   1 /*****************************************************************************
   2   Copyright (c) 2006 EMC Corporation.
   3   Copyright (c) 2011 Factor-SPE
   4
   5   This program is free software; you can redistribute it and/or modify it
   6   under the terms of the GNU General Public License as published by the Free
   7   Software Foundation; either version 2 of the License, or (at your option)
   8   any later version.
   9
  10   This program is distributed in the hope that it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc., 59
  17   Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19   The full GNU General Public License is included in this distribution in the
  20   file called LICENSE.
  21
  22   Authors: Srinivas Aji <Aji_Srinivas@emc.com>
  23   Authors: Vitalii Demianets <dvitasgs@gmail.com>
  24
  25 ******************************************************************************/
  26
  27 #ifndef LOG_H
  28 #define LOG_H
  29
  30 #include <stdio.h>
  31 #include <stdarg.h>
  32
  33 #define LOG_LEVEL_NONE  0
  34 #define LOG_LEVEL_ERROR 1
  35 #define LOG_LEVEL_INFO  2
  36 #define LOG_LEVEL_DEBUG 3
  37 #define LOG_LEVEL_STATE_MACHINE_TRANSITION 4
  38
  39 #ifdef DEBUG
  40 #define LOG_LEVEL_MAX   100
  41 #else
  42 #define LOG_LEVEL_MAX   LOG_LEVEL_INFO
  43 #endif
  44
  45 #define LOG_LEVEL_DEFAULT LOG_LEVEL_ERROR
  46
  47 extern void Dprintf(int level, const char *fmt, ...);
  48 extern int log_level;
  49
  50 #define PRINT(_level, _fmt, _args...)                   \
  51         ({                                              \
  52                 if ((_level) <= LOG_LEVEL_MAX)          \
  53                         Dprintf(_level, _fmt, ##_args); \
  54         })
  55
  56 #define TSTM(x, y, _fmt, _args...)                                         \
  57     do if(!(x))                                                            \
  58     {                                                                      \
  59         PRINT(LOG_LEVEL_ERROR, "Error in %s at %s:%d verifying %s. " _fmt, \
  60               __PRETTY_FUNCTION__, __FILE__, __LINE__, #x, ##_args);       \
  61         return y;                                                          \
  62     } while (0)
  63
  64 #define TST(x, y) TSTM(x, y, "")
  65
  66 #define LOG(_fmt, _args...) \
  67     PRINT(LOG_LEVEL_DEBUG, "%s: " _fmt, __PRETTY_FUNCTION__, ##_args)
  68
  69 #define INFO(_fmt, _args...) \
  70     PRINT(LOG_LEVEL_INFO, "%s: " _fmt, __PRETTY_FUNCTION__, ##_args)
  71
  72 #define ERROR(_fmt, _args...) \
  73     PRINT(LOG_LEVEL_ERROR, "%s: " _fmt, __PRETTY_FUNCTION__, ##_args)
  74
  75 static inline void dump_hex(void *b, int l)
  76 {
  77     unsigned char *buf = b;
  78     char logbuf[80];
  79     int i, j;
  80     for (i = 0; i < l; i += 16) {
  81         for (j = 0; j < 16 && i + j < l; ++j)
  82             sprintf(logbuf + j * 3, " %02x", buf[i + j]);
  83         PRINT(LOG_LEVEL_INFO, "%s", logbuf);
  84     }
  85     PRINT(LOG_LEVEL_INFO, "\n");
  86 }
  87
  88 #endif /* LOG_H */