1 files changed, 157 insertions, 0 deletions
diff --git a/service/dconf-gvdb-utils.c b/service/dconf-gvdb-utils.c
new file mode 100644
index 0000000..4e93cc8
--- /dev/null
+++ b/service/dconf-gvdb-utils.c
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+/*
+ * Copyright © 2010 Codethink Limited
+ * Copyright © 2012 Canonical Limited
+ *
+ * This library 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 of the licence, or (at your option) any later version.
+ *
+ * This library 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 library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Author: Ryan Lortie <desrt@desrt.ca>
+ */
+
+#include "dconf-gvdb-utils.h"
+
+#include "../gvdb/gvdb-builder.h"
+#include "../gvdb/gvdb-reader.h"
+
+#include <string.h>
+
+DConfChangeset *
+dconf_gvdb_utils_read_file (const gchar  *filename,
+                            GError      **error)
+{
+  DConfChangeset *database;
+  GError *my_error = NULL;
+  GvdbTable *table;
+
+  table = gvdb_table_new (filename, FALSE, &my_error);
+
+  /* It is perfectly fine if the file does not exist -- then it's
+   * just empty.
+   */
+  if (g_error_matches (my_error, G_FILE_ERROR, G_FILE_ERROR_NOENT))
+    g_clear_error (&my_error);
+
+  /* Otherwise, we should report errors to prevent ourselves from
+   * overwriting the database in other situations...
+   */
+  if (my_error)
+    {
+      g_propagate_prefixed_error (error, my_error, "Cannot open dconf database: ");
+      return NULL;
+    }
+
+  /* Only allocate once we know we are in a non-error situation */
+  database = dconf_changeset_new_database (NULL);
+
+  /* Fill the table up with the initial state */
+  if (table != NULL)
+    {
+      gchar **names;
+      gint n_names;
+      gint i;
+
+      names = gvdb_table_get_names (table, &n_names);
+      for (i = 0; i < n_names; i++)
+        {
+          if (dconf_is_key (names[i], NULL))
+            {
+              GVariant *value;
+
+              value = gvdb_table_get_value (table, names[i]);
+
+              if (value != NULL)
+                {
+                  dconf_changeset_set (database, names[i], value);
+                  g_variant_unref (value);
+                }
+            }
+
+          g_free (names[i]);
+        }
+
+      gvdb_table_unref (table);
+      g_free (names);
+    }
+
+  return database;
+}
+
+static GvdbItem *
+dconf_gvdb_utils_get_parent (GHashTable  *table,
+                             const gchar *key)
+{
+  GvdbItem *grandparent, *parent;
+  gchar *parent_name;
+  gint len;
+
+  if (g_str_equal (key, "/"))
+    return NULL;
+
+  len = strlen (key);
+  if (key[len - 1] == '/')
+    len--;
+
+  while (key[len - 1] != '/')
+    len--;
+
+  parent_name = g_strndup (key, len);
+  parent = g_hash_table_lookup (table, parent_name);
+
+  if (parent == NULL)
+    {
+      parent = gvdb_hash_table_insert (table, parent_name);
+
+      grandparent = dconf_gvdb_utils_get_parent (table, parent_name);
+
+      if (grandparent != NULL)
+        gvdb_item_set_parent (parent, grandparent);
+    }
+
+  g_free (parent_name);
+
+  return parent;
+}
+
+static gboolean
+dconf_gvdb_utils_add_key (const gchar *path,
+                          GVariant    *value,
+                          gpointer     user_data)
+{
+  GHashTable *gvdb = user_data;
+  GvdbItem *item;
+
+  g_assert (g_hash_table_lookup (gvdb, path) == NULL);
+  item = gvdb_hash_table_insert (gvdb, path);
+  gvdb_item_set_parent (item, dconf_gvdb_utils_get_parent (gvdb, path));
+  gvdb_item_set_value (item, value);
+
+  return TRUE;
+}
+
+gboolean
+dconf_gvdb_utils_write_file (const gchar     *filename,
+                             DConfChangeset  *database,
+                             GError         **error)
+{
+  GHashTable *gvdb;
+  gboolean success;
+
+  gvdb = gvdb_hash_table_new (NULL, NULL);
+  dconf_changeset_all (database, dconf_gvdb_utils_add_key, gvdb);
+  success = gvdb_table_write_contents (gvdb, filename, FALSE, error);
+  g_hash_table_unref (gvdb);
+
+  return success;
+}