lib/tevent/tevent_debug.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Copyright (C) Andrew Tridgell 2005
   5    Copyright (C) Jelmer Vernooij 2005
   6
   7      ** NOTE! The following LGPL license applies to the tevent
   8      ** library. This does NOT imply that all of Samba is released
   9      ** under the LGPL
  10
  11    This library is free software; you can redistribute it and/or
  12    modify it under the terms of the GNU Lesser General Public
  13    License as published by the Free Software Foundation; either
  14    version 3 of the License, or (at your option) any later version.
  15
  16    This library is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19    Lesser General Public License for more details.
  20
  21    You should have received a copy of the GNU Lesser General Public
  22    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "replace.h"
  26 #include "tevent.h"
  27 #include "tevent_internal.h"
  28
  29 /********************************************************************
  30  * Debug wrapper functions, modeled (with lot's of code copied as is)
  31  * after the ev debug wrapper functions
  32  ********************************************************************/
  33
  34 /*
  35   this allows the user to choose their own debug function
  36 */
  37 int tevent_set_debug(struct tevent_context *ev,
  38                      void (*debug)(void *context,
  39                                    enum tevent_debug_level level,
  40                                    const char *fmt,
  41                                    va_list ap) PRINTF_ATTRIBUTE(3,0),
  42                      void *context)
  43 {
  44         ev->debug_ops.debug = debug;
  45         ev->debug_ops.context = context;
  46         return 0;
  47 }
  48
  49 /*
  50   debug function for ev_set_debug_stderr
  51 */
  52 static void tevent_debug_stderr(void *private_data,
  53                                 enum tevent_debug_level level,
  54                                 const char *fmt,
  55                                 va_list ap) PRINTF_ATTRIBUTE(3,0);
  56 static void tevent_debug_stderr(void *private_data,
  57                                 enum tevent_debug_level level,
  58                                 const char *fmt, va_list ap)
  59 {
  60         if (level <= TEVENT_DEBUG_WARNING) {
  61                 vfprintf(stderr, fmt, ap);
  62         }
  63 }
  64
  65 /*
  66   convenience function to setup debug messages on stderr
  67   messages of level TEVENT_DEBUG_WARNING and higher are printed
  68 */
  69 int tevent_set_debug_stderr(struct tevent_context *ev)
  70 {
  71         return tevent_set_debug(ev, tevent_debug_stderr, ev);
  72 }
  73
  74 /*
  75  * log a message
  76  *
  77  * The default debug action is to ignore debugging messages.
  78  * This is the most appropriate action for a library.
  79  * Applications using the library must decide where to
  80  * redirect debugging messages
  81 */
  82 void tevent_debug(struct tevent_context *ev, enum tevent_debug_level level,
  83                   const char *fmt, ...)
  84 {
  85         va_list ap;
  86         if (!ev) {
  87                 return;
  88         }
  89         if (ev->debug_ops.debug == NULL) {
  90                 return;
  91         }
  92         va_start(ap, fmt);
  93         ev->debug_ops.debug(ev->debug_ops.context, level, fmt, ap);
  94         va_end(ap);
  95 }
  96