src/graph.[ch]: Implement "graph_sort_instances".

[collection4.git] / src / graph_list.c

diff --git a/src/graph_list.c b/src/graph_list.c
index de80b3b..1aab96d 100644 (file)
--- a/src/graph_list.c
+++ b/src/graph_list.c
@@ -1,3 +1,26 @@
+/**
+ * collection4 - graph_list.c
+ * Copyright (C) 2010  Florian octo Forster
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301  USA
+ *
+ * Authors:
+ *   Florian octo Forster <ff at octo.it>
+ **/
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdint.h>
@@ -7,11 +30,12 @@
 #include <errno.h>
 
 #include "graph_list.h"
-#include "graph_ident.h"
-#include "graph_def.h"
-#include "graph_config.h"
 #include "common.h"
 #include "filesystem.h"
+#include "graph.h"
+#include "graph_config.h"
+#include "graph_def.h"
+#include "graph_ident.h"
 #include "utils_cgi.h"
 
 #include <fcgiapp.h>
@@ -31,12 +55,15 @@ static size_t gl_active_num = 0;
 static graph_config_t **gl_staging = NULL;
 static size_t gl_staging_num = 0;
 
+static char **host_list = NULL;
+static size_t host_list_len = 0;
+
 static time_t gl_last_update = 0;
 
 /*
  * Private functions
  */
-int gl_add_graph_internal (graph_config_t *cfg, /* {{{ */
+static int gl_add_graph_internal (graph_config_t *cfg, /* {{{ */
     graph_config_t ***gl_array, size_t *gl_array_num)
 {
   graph_config_t **tmp;
@@ -61,6 +88,50 @@ int gl_add_graph_internal (graph_config_t *cfg, /* {{{ */
   return (0);
 } /* }}} int gl_add_graph_internal */
 
+static int gl_register_host (const char *host) /* {{{ */
+{
+  char **tmp;
+  size_t i;
+
+  if (host == NULL)
+    return (EINVAL);
+
+  for (i = 0; i < host_list_len; i++)
+    if (strcmp (host_list[i], host) == 0)
+      return (0);
+
+  tmp = realloc (host_list, sizeof (*host_list) * (host_list_len + 1));
+  if (tmp == NULL)
+    return (ENOMEM);
+  host_list = tmp;
+
+  host_list[host_list_len] = strdup (host);
+  if (host_list[host_list_len] == NULL)
+    return (ENOMEM);
+
+  host_list_len++;
+  return (0);
+} /* }}} int gl_register_host */
+
+static int gl_clear_hosts (void) /* {{{ */
+{
+  size_t i;
+
+  for (i = 0; i < host_list_len; i++)
+    free (host_list[i]);
+  free (host_list);
+
+  host_list = NULL;
+  host_list_len = 0;
+
+  return (0);
+} /* }}} int gl_clear_hosts */
+
+static int gl_compare_hosts (const void *v0, const void *v1) /* {{{ */
+{
+  return (strcmp (v0, v1));
+} /* }}} int gl_compare_hosts */
+
 static int gl_register_file (const graph_ident_t *file, /* {{{ */
     __attribute__((unused)) void *user_data)
 {
@@ -94,6 +165,8 @@ static int gl_register_file (const graph_ident_t *file, /* {{{ */
     graph_add_file (cfg, file);
   }
 
+  gl_register_host (ident_get_host (file));
+
   return (0);
 } /* }}} int gl_register_file */
 
@@ -302,6 +375,22 @@ int gl_search_field (graph_ident_field_t field, /* {{{ */
   return (0);
 } /* }}} int gl_search_field */
 
+int gl_foreach_host (int (*callback) (const char *host, void *user_data), /* {{{ */
+    void *user_data)
+{
+  int status;
+  size_t i;
+
+  for (i = 0; i < host_list_len; i++)
+  {
+    status = (*callback) (host_list[i], user_data);
+    if (status != 0)
+      return (status);
+  }
+
+  return (0);
+} /* }}} int gl_foreach_host */
+
 int gl_update (void) /* {{{ */
 {
   time_t now;
@@ -319,8 +408,13 @@ int gl_update (void) /* {{{ */
   graph_read_config ();
 
   gl_clear_instances ();
+  gl_clear_hosts ();
   status = fs_scan (/* callback = */ gl_register_file, /* user data = */ NULL);
 
+  if (host_list_len > 0)
+    qsort (host_list, host_list_len, sizeof (*host_list),
+        gl_compare_hosts);
+
   gl_last_update = now;
 
   return (status);