[RFC PATCH 6/8] add a way to append to logs

[Damien Riegel]

By default, mutt_log will prepend a date to the log if it has changed
between two debug statements. In some situation, it might cause the logs
to be very hard to read.

This adds a function mutt_log_append that simply appends the string to
the logs, without printing the date.
---
 lib.c | 34 +++++++++++++++++++++++++++-------
 lib.h |  1 +
 2 files changed, 28 insertions(+), 7 deletions(-)

diff --git a/lib.c b/lib.c
index 38fffb2..a90bc20 100644
--- a/lib.c
+++ b/lib.c
@@ -1053,9 +1053,8 @@ int mutt_log_get_level (void)
   return debuglevel;
 }
 
-void mutt_log (int level, const char *fmt, ...)
+static void mutt_vlog (int level, int print_time, const char *fmt, va_list vl)
 {
-  va_list ap;
   time_t now = time (NULL);
   static char buf[23] = "";
   static time_t last = 0;
@@ -1063,14 +1062,35 @@ void mutt_log (int level, const char *fmt, ...)
   if (debuglevel < level || !debugfile)
     return;
 
-  if (now > last)
+  if (print_time)
   {
-    strftime (buf, sizeof (buf), "%Y-%m-%d %H:%M:%S", localtime (&now));
-    last = now;
+    if (now > last)
+    {
+      strftime (buf, sizeof (buf), "%Y-%m-%d %H:%M:%S", localtime (&now));
+      last = now;
+    }
+
+    fprintf (debugfile, "[%s] ", buf);
   }
-  fprintf (debugfile, "[%s] ", buf);
+
+  vfprintf (debugfile, fmt, vl);
+}
+
+void mutt_log (int level, const char *fmt, ...)
+{
+  va_list ap;
+
+  va_start (ap, fmt);
+  mutt_vlog (level, 1, fmt, ap);
+  va_end (ap);
+}
+
+void mutt_log_append (int level, const char *fmt, ...)
+{
+  va_list ap;
+
   va_start (ap, fmt);
-  vfprintf (debugfile, fmt, ap);
+  mutt_vlog (level, 0, fmt, ap);
   va_end (ap);
 }
 #endif
diff --git a/lib.h b/lib.h
index 2328fca..f8f4d88 100644
--- a/lib.h
+++ b/lib.h
@@ -139,6 +139,7 @@ int mutt_log_init (const char *reldate, const char 
*homedir);
 int mutt_log_set_level (int level);
 int mutt_log_get_level (void);
 void mutt_log (int level, const char *, ...);
+void mutt_log_append (int level, const char *, ...);
 
 # else
 
-- 
2.9.0