[glib] Allow setting G_FILE_ATTRIBUTE_TYPE_INVALID attributes in GFileInfo

[Alexander Larsson <alexl src gnome org>]

commit d884e509db1ab6a6d388313d28b7b07cebb3dfc0
Author: Alexander Larsson <alexl redhat com>
Date:   Thu Jun 25 09:18:01 2009 +0200

    Allow setting G_FILE_ATTRIBUTE_TYPE_INVALID attributes in GFileInfo
    
    This is used to unset an attribute in g_file_set_attributes_from_info.

 gio/gfileattribute.c |    7 +++++++
 gio/gfileinfo.c      |    2 +-
 2 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/gio/gfileattribute.c b/gio/gfileattribute.c
index 671c7cc..4fb6ffa 100644
--- a/gio/gfileattribute.c
+++ b/gio/gfileattribute.c
@@ -461,6 +461,9 @@ _g_file_attribute_value_as_string (const GFileAttributeValue *attr)
                                           ((GTypeInstance *) attr->u.obj),
                                       attr->u.obj);
       break;
+    case G_FILE_ATTRIBUTE_TYPE_INVALID:
+      str = g_strdup ("<unset>");
+      break;
     default:
       g_warning ("Invalid type in GFileInfo attribute");
       str = g_strdup ("<invalid>");
@@ -693,6 +696,10 @@ _g_file_attribute_value_set_from_pointer (GFileAttributeValue *value,
     case G_FILE_ATTRIBUTE_TYPE_INT64:
       value->u.int64 = *(gint64 *)value_p;
       break;
+
+    case G_FILE_ATTRIBUTE_TYPE_INVALID:
+      break;
+
     default:
       g_warning ("Unknown type specified in g_file_info_set_attribute\n");
       break;
diff --git a/gio/gfileinfo.c b/gio/gfileinfo.c
index aed7975..2785a10 100644
--- a/gio/gfileinfo.c
+++ b/gio/gfileinfo.c
@@ -566,7 +566,7 @@ g_file_info_list_attributes (GFileInfo  *info,
  * Gets the attribute type for an attribute key.
  * 
  * Returns: a #GFileAttributeType for the given @attribute, or 
- * %G_FILE_ATTRIBUTE_TYPE_INVALID if the key is invalid.
+ * %G_FILE_ATTRIBUTE_TYPE_INVALID if the key is not set.
  **/
 GFileAttributeType
 g_file_info_get_attribute_type (GFileInfo  *info,