site: Break out slog_start

This will allow callers in site.c to build up messages bit by bit.

No functional change.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/site.c b/site.c
index 5f415dec7a55093e7aa00dfd34ad1e7400ef3f86..2a89880c7e9e167bb6afeff2a0131512d3f7602d 100644 (file)
--- a/site.c
+++ b/site.c
@@ -396,15 +396,23 @@ static uint32_t event_log_priority(struct site *st, uint32_t event)
     }
 }
 
+static uint32_t slog_start(struct site *st, uint32_t event)
+{
+    uint32_t class=event_log_priority(st, event);
+    if (class) {
+       slilog_part(st->log,class,"%s: ",st->tunname);
+    }
+    return class;
+}
+
 static void vslog(struct site *st, uint32_t event, cstring_t msg, va_list ap)
 FORMAT(printf,3,0);
 static void vslog(struct site *st, uint32_t event, cstring_t msg, va_list ap)
 {
     uint32_t class;
 
-    class=event_log_priority(st, event);
+    class=slog_start(st,event);
     if (class) {
-       slilog_part(st->log,class,"%s: ",st->tunname);
        vslilog_part(st->log,class,msg,ap);
        slilog_part(st->log,class,"\n");
     }