[dconf: 3/5] Pass name_length to walk close function

[Ryan Lortie <ryanl src gnome org>]

commit 814c0fcaafd42c622634c7b6a34c126210b17fc2
Author: Ryan Lortie <desrt desrt ca>
Date:   Tue Dec 7 01:06:33 2010 -0500

    Pass name_length to walk close function
    
    For efficiency and safety.  This way we don't need to scan backwards for
    the path separator (trusting that we will find it properly).

 gvdb-reader.c |   29 ++++++++++++++++++++++++++++-
 gvdb-reader.h |    3 ++-
 2 files changed, 30 insertions(+), 2 deletions(-)
---
diff --git a/gvdb-reader.c b/gvdb-reader.c
index fb23393..f49ff4e 100644
--- a/gvdb-reader.c
+++ b/gvdb-reader.c
@@ -574,6 +574,30 @@ gvdb_table_is_valid (GvdbTable *table)
   return !!*table->data;
 }
 
+/**
+ * gvdb_table_walk:
+ * @table: a #GvdbTable
+ * @key: a key corresponding to a list
+ * @open_func: the #GvdbWalkOpenFunc
+ * @value_func: the #GvdbWalkValueFunc
+ * @close_func: the #GvdbWalkCloseFunc
+ * @user_data: data to pass to the callbacks
+ *
+ * Looks up the list at @key and iterate over the items in it.
+ *
+ * First, @open_func is called to signal that we are starting to iterate over
+ * the list.  Then the list is iterated.  When all items in the list have been
+ * iterated over, the @close_func is called.
+ *
+ * When iterating, if a given item in the list is a value then @value_func is
+ * called.
+ *
+ * If a given item in the list is itself a list then @open_func is called.  If
+ * that function returns %TRUE then the walk begins iterating the items in the
+ * sublist, until there are no more items, at which point a matching
+ * @close_func call is made.  If @open_func returns %FALSE then no iteration of
+ * the sublist occurs and no corresponding @close_func call is made.
+ **/
 void
 gvdb_table_walk (GvdbTable         *table,
                  const gchar       *key,
@@ -585,16 +609,18 @@ gvdb_table_walk (GvdbTable         *table,
   const struct gvdb_hash_item *item;
   const guint32_le *pointers[64];
   const guint32_le *enders[64];
+  gsize name_lengths[64];
   gint index = 0;
 
   item = gvdb_table_lookup (table, key, 'L');
+  name_lengths[0] = 0;
   pointers[0] = NULL;
   enders[0] = NULL;
   goto start_here;
 
   while (index)
     {
-      close_func (user_data);
+      close_func (name_lengths[index], user_data);
       index--;
 
       while (pointers[index] < enders[index])
@@ -621,6 +647,7 @@ gvdb_table_walk (GvdbTable         *table,
                                                  &pointers[index],
                                                  &length);
                       enders[index] = pointers[index] + length;
+                      name_lengths[index] = name_len;
                     }
                 }
               else if (item->type == 'v')
diff --git a/gvdb-reader.h b/gvdb-reader.h
index 9f302c0..e75c69c 100644
--- a/gvdb-reader.h
+++ b/gvdb-reader.h
@@ -62,7 +62,8 @@ typedef void          (*GvdbWalkValueFunc)                              (const g
 typedef gboolean      (*GvdbWalkOpenFunc)                               (const gchar       *name,
                                                                          gsize              name_len,
                                                                          gpointer           user_data);
-typedef void          (*GvdbWalkCloseFunc)                              (gpointer           user_data);
+typedef void          (*GvdbWalkCloseFunc)                              (gsize              name_len,
+                                                                         gpointer           user_data);
 
 void                    gvdb_table_walk                                 (GvdbTable         *table,
                                                                          const gchar       *key,