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
  19 #include "common.h"
  20
  21 #include <stdarg.h>
  22
  23 #include "mem.h"
  24 #include "vector.h"
  25 #include "printf.h"
  26 #include "eventlog.h"
  27 #include "split.h"
  28
  29 static struct eventlog_output *outputs;
  30
  31 void eventlog_add(struct eventlog_output *lo) {
  32   lo->next = outputs;
  33   outputs = lo;
  34 }
  35
  36 void eventlog_remove(struct eventlog_output *lo) {
  37   struct eventlog_output *p, **pp;
  38
  39   for(pp = &outputs; (p = *pp) && p != lo; pp = &p->next)
  40     ;
  41   if(p == lo)
  42     *pp = lo->next;
  43 }
  44
  45 static void veventlog(const char *keyword, const char *raw, va_list ap) {
  46   struct eventlog_output *p, *pnext;
  47   struct dynstr d;
  48   const char *param;
  49
  50   dynstr_init(&d);
  51   dynstr_append_string(&d, keyword);
  52   while((param = va_arg(ap, const char *))) {
  53     dynstr_append(&d, ' ');
  54     dynstr_append_string(&d, quoteutf8(param));
  55   }
  56   if(raw) {
  57     dynstr_append(&d, ' ');
  58     dynstr_append_string(&d, raw);
  59   }
  60   dynstr_terminate(&d);
  61   for(p = outputs; p; p = pnext) {
  62     /* We must be able to cope with eventlog_remove() being called from inside
  63      * the callback */
  64     pnext = p->next;
  65     p->fn(d.vec, p->user);
  66   }
  67 }
  68
  69 void eventlog_raw(const char *keyword, const char *raw, ...) {
  70   va_list ap;
  71
  72   va_start(ap, raw);
  73   veventlog(keyword, raw, ap);
  74   va_end(ap);
  75 }
  76
  77 void eventlog(const char *keyword, ...) {
  78   va_list ap;
  79
  80   va_start(ap, keyword);
  81   veventlog(keyword, 0, ap);
  82   va_end(ap);
  83 }
  84
  85 /*
  86 Local Variables:
  87 c-basic-offset:2
  88 comment-column:40
  89 fill-column:79
  90 End:
  91 */