From 57811ec03166433462141458b43b1347199e0519 Mon Sep 17 00:00:00 2001
From: Florian Forster <ff@octo.it>
Date: Tue, 15 Jun 2010 14:18:32 +0200
Subject: [PATCH] graph_instance.[ch]: Implement "inst_describe".

---
 action_list_graphs.c | 12 ++++++++----
 graph_ident.c        |  3 ---
 graph_ident.h        |  3 +++
 graph_instance.c     | 43 +++++++++++++++++++++++++++++++++++++++++++
 graph_instance.h     |  3 +++
 5 files changed, 57 insertions(+), 7 deletions(-)

diff --git a/action_list_graphs.c b/action_list_graphs.c
index 4ec9a30..d7cea47 100644
--- a/action_list_graphs.c
+++ b/action_list_graphs.c
@@ -66,12 +66,16 @@ static int print_graph_inst_html (graph_config_t *cfg, /* {{{ */
     graph_instance_t *inst,
     __attribute__((unused)) void *user_data)
 {
-  char buffer[1024];
+  char params[1024];
+  char desc[1024];
 
-  memset (buffer, 0, sizeof (buffer));
-  inst_get_params (cfg, inst, buffer, sizeof (buffer));
+  memset (params, 0, sizeof (params));
+  inst_get_params (cfg, inst, params, sizeof (params));
+
+  memset (desc, 0, sizeof (desc));
+  inst_describe (cfg, inst, desc, sizeof (desc));
 
-  printf ("<li><a href=\"test.fcgi?action=graph;%s\">%s</a></li>\n", buffer, buffer);
+  printf ("<li><a href=\"test.fcgi?action=graph;%s\">%s</a></li>\n", params, desc);
 
   return (0);
 } /* }}} int print_graph_inst_html */
diff --git a/graph_ident.c b/graph_ident.c
index 454cc1a..b008a56 100644
--- a/graph_ident.c
+++ b/graph_ident.c
@@ -8,9 +8,6 @@
 #include "common.h"
 #include "filesystem.h"
 
-#define IS_ANY(str) (((str) != NULL) && (strcasecmp (ANY_TOKEN, (str)) == 0))
-#define IS_ALL(str) (((str) != NULL) && (strcasecmp (ALL_TOKEN, (str)) == 0))
-
 /*
  * Data types
  */
diff --git a/graph_ident.h b/graph_ident.h
index 442bcfe..5107011 100644
--- a/graph_ident.h
+++ b/graph_ident.h
@@ -4,6 +4,9 @@
 #define ANY_TOKEN "/any/"
 #define ALL_TOKEN "/all/"
 
+#define IS_ANY(str) (((str) != NULL) && (strcasecmp (ANY_TOKEN, (str)) == 0))
+#define IS_ALL(str) (((str) != NULL) && (strcasecmp (ALL_TOKEN, (str)) == 0))
+
 struct graph_ident_s;
 typedef struct graph_ident_s graph_ident_t;
 
diff --git a/graph_instance.c b/graph_instance.c
index 11629a5..d9821d0 100644
--- a/graph_instance.c
+++ b/graph_instance.c
@@ -440,4 +440,47 @@ graph_instance_t *inst_find_matching (graph_instance_t *inst, /* {{{ */
   return (NULL);
 } /* }}} graph_instance_t *inst_find_matching */
 
+int inst_describe (graph_config_t *cfg, graph_instance_t *inst, /* {{{ */
+    char *buffer, size_t buffer_size)
+{
+  graph_ident_t *cfg_select;
+
+  if ((cfg == NULL) || (inst == NULL)
+      || (buffer == NULL) || (buffer_size < 2))
+    return (EINVAL);
+
+  cfg_select = graph_get_selector (cfg);
+  if (cfg_select == NULL)
+  {
+    fprintf (stderr, "inst_describe: graph_get_selector failed\n");
+    return (-1);
+  }
+
+  buffer[0] = 0;
+
+#define CHECK_FIELD(field) do {                                              \
+  if (IS_ANY (ident_get_##field (cfg_select)))                               \
+  {                                                                          \
+    if (buffer[0] != 0)                                                      \
+      strlcat (buffer, "/", buffer_size);                                    \
+    strlcat (buffer, ident_get_##field (inst->select), buffer_size);         \
+  }                                                                          \
+} while (0)
+
+  CHECK_FIELD (host);
+  CHECK_FIELD (plugin);
+  CHECK_FIELD (plugin_instance);
+  CHECK_FIELD (type);
+  CHECK_FIELD (type_instance);
+
+#undef CHECK_FIELD
+
+  if (buffer[0] == 0)
+    strlcat (buffer, "default", buffer_size);
+
+  ident_destroy (cfg_select);
+
+  return (0);
+} /* }}} int inst_describe */
+
 /* vim: set sw=2 sts=2 et fdm=marker : */
diff --git a/graph_instance.h b/graph_instance.h
index 39cb4c9..b90f984 100644
--- a/graph_instance.h
+++ b/graph_instance.h
@@ -43,5 +43,8 @@ int inst_foreach (graph_instance_t *inst,
 graph_instance_t *inst_find_matching (graph_instance_t *inst,
     const graph_ident_t *ident);
 
+int inst_describe (graph_config_t *cfg, graph_instance_t *inst,
+    char *buffer, size_t buffer_size);
+
 #endif /* GRAPH_INSTANCE_H */
 /* vim: set sw=2 sts=2 et fdm=marker : */
-- 
2.30.2