mdw@git.distorted.org.uk Git - disorder/blob - lib/eventlog.c

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2005, 2007, 2008 Richard Kettlewell
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18 /** @file lib/eventlog.c
  19  * @brief Event logging
  20  */
  21 #include "common.h"
  22
  23 #include <stdarg.h>
  24
  25 #include "mem.h"
  26 #include "vector.h"
  27 #include "printf.h"
  28 #include "eventlog.h"
  29 #include "split.h"
  30
  31 /** @brief Linked list of event logs */
  32 static struct eventlog_output *outputs;
  33
  34 void eventlog_add(struct eventlog_output *lo) {
  35   lo->next = outputs;
  36   outputs = lo;
  37 }
  38
  39 void eventlog_remove(struct eventlog_output *lo) {
  40   struct eventlog_output *p, **pp;
  41
  42   for(pp = &outputs; (p = *pp) && p != lo; pp = &p->next)
  43     ;
  44   if(p == lo)
  45     *pp = lo->next;
  46 }
  47
  48 /** @brief Write to the event log
  49  * @param keyword Distinguishing keyword for event
  50  * @param raw Unformatted data
  51  * @param ap Extra data, terminated by (char *)0
  52  */
  53 static void veventlog(const char *keyword, const char *raw, va_list ap) {
  54   struct eventlog_output *p, *pnext;
  55   struct dynstr d;
  56   const char *param;
  57
  58   dynstr_init(&d);
  59   dynstr_append_string(&d, keyword);
  60   while((param = va_arg(ap, const char *))) {
  61     dynstr_append(&d, ' ');
  62     dynstr_append_string(&d, quoteutf8(param));
  63   }
  64   if(raw) {
  65     dynstr_append(&d, ' ');
  66     dynstr_append_string(&d, raw);
  67   }
  68   dynstr_terminate(&d);
  69   for(p = outputs; p; p = pnext) {
  70     /* We must be able to cope with eventlog_remove() being called from inside
  71      * the callback */
  72     pnext = p->next;
  73     p->fn(d.vec, p->user);
  74   }
  75 }
  76
  77 void eventlog_raw(const char *keyword, const char *raw, ...) {
  78   va_list ap;
  79
  80   va_start(ap, raw);
  81   veventlog(keyword, raw, ap);
  82   va_end(ap);
  83 }
  84
  85 void eventlog(const char *keyword, ...) {
  86   va_list ap;
  87
  88   va_start(ap, keyword);
  89   veventlog(keyword, 0, ap);
  90   va_end(ap);
  91 }
  92
  93 /*
  94 Local Variables:
  95 c-basic-offset:2
  96 comment-column:40
  97 fill-column:79
  98 End:
  99 */