graph_list.c: Improve error handling in one little case.

[collection4.git] / graph_def.c

diff --git a/graph_def.c b/graph_def.c
index 80f6a0c..181788a 100644 (file)
--- a/graph_def.c
+++ b/graph_def.c
@@ -12,6 +12,8 @@ struct graph_def_s
 {
   graph_ident_t *select;
 
+  uint32_t color;
+
   graph_def_t *next;
 };
 
@@ -38,6 +40,7 @@ graph_def_t *def_create (graph_config_t *cfg, graph_ident_t *ident) /* {{{ */
     return (NULL);
   }
   memset (ret, 0, sizeof (*ret));
+  ret->color = get_random_color ();
   ret->next = NULL;
 
   ret->select = ident_copy_with_selector (selector, ident,
@@ -69,6 +72,22 @@ void def_destroy (graph_def_t *def) /* {{{ */
   def_destroy (next);
 } /* }}} void def_destroy */
 
+int def_append (graph_def_t *head, graph_def_t *def) /* {{{ */
+{
+  graph_def_t *ptr;
+
+  if ((head == NULL) || (def == NULL))
+    return (EINVAL);
+
+  ptr = head;
+  while (ptr->next != NULL)
+    ptr = ptr->next;
+
+  ptr->next = def;
+
+  return (0);
+} /* }}} int def_append */
+
 graph_def_t *def_search (graph_def_t *head, graph_ident_t *ident) /* {{{ */
 {
   graph_def_t *ptr;
@@ -138,7 +157,7 @@ int def_get_rrdargs (graph_def_t *def, graph_ident_t *ident, /* {{{ */
 
     /* Graph part */
     array_append_format (args, "LINE1:def_%04i_avg#%06"PRIx32":%s",
-        index, get_random_color (), dses[i]);
+        index, def->color, dses[i]);
     array_append_format (args, "GPRINT:vdef_%04i_min:%%lg min,", index);
     array_append_format (args, "GPRINT:vdef_%04i_avg:%%lg avg,", index);
     array_append_format (args, "GPRINT:vdef_%04i_max:%%lg max,", index);