Store timestamps. Implement zero-unknown option.

* src/graph.c (draw_graph): Use timestamps from queue entries.
Implement zero_unknown_option.
* src/output.c: Store timestamps in traffic_history entries.
* src/readconfig.c (cb_monitor, cb_server): Fix checks for
empty ID.
(tagr_kw): New keyword cut-out-fraction.
(readconfig): Reset cut_out_fraction if it is < 1.0.
* src/report.c: Print timestamps.
* src/stat.c (cut_out_fraction): New variable.
(ovf_t, overflow): Remove (spurious now) arguments.
(interpolate, overflow, update_stats): Don't interpolate if
time interval between this sample and the lastly taken one
is greater than step * cut_out_fraction.
* src/tagr.h (TAGR_CUT_OUT): New define.

1 files changed, 12 insertions, 4 deletions

diff --git a/src/readconfig.c b/src/readconfig.c
index 9eff4c7..e75cae4 100644
--- a/src/readconfig.c
+++ b/src/readconfig.c
@@ -89,10 +89,12 @@ cb_monitor (enum grecs_callback_command cmd,
   switch (cmd)
     {
     case grecs_callback_section_begin:
-      if (!value || value->type != GCONF_TYPE_STRING)
+      if (!value
+	  || value->type != GCONF_TYPE_STRING
+	  || value->v.string == NULL)
 	{
 	  grecs_error (locus, 0, _("tag must be a string"));
-	  return 0;
+	  return 1;
 	}
       mon = xzalloc (sizeof (*mon));
       mon->id = strdup (value->v.string);
@@ -399,10 +401,11 @@ cb_server (enum grecs_callback_command cmd,
   switch (cmd)
     {
     case grecs_callback_section_begin:
-      if (!value || value->type != GCONF_TYPE_STRING)
+      if (!value || value->type != GCONF_TYPE_STRING
+	  || !value->v.string)
 	{
 	  grecs_error (locus, 0, _("tag must be a string"));
-	  return 0;
+	  return 1;
 	}
       cfg = xzalloc (sizeof (*cfg));
       cfg->id = value->v.string;
@@ -482,6 +485,9 @@ static struct grecs_keyword tagr_kw[] = {
   { "zero-unknown", NULL,
     N_("Zero-out missing samples (not implemented)") /* FIXME */,
     grecs_type_bool, &zero_unknown_option },
+  { "cut-out-fraction", N_("arg: double"), NULL, /* FIXME */
+    grecs_type_string, &cut_out_fraction, 0,
+    cb_double },
   { "fill-incoming", NULL, N_("Fill incoming graph"),
     grecs_type_bool, &fill_incoming_option },
 
@@ -547,6 +553,8 @@ readconfig ()
   rc = grecs_parse (configfile);
   if (rc == 0)
     mon_base = obstack_finish (&mon_stack);
+  if (cut_out_fraction < 1.0)
+    cut_out_fraction = TAGR_CUT_OUT;
   return rc;
 }