From: Martin Mares <mj@ucw.cz>
Date: Wed, 26 Mar 2003 20:03:40 +0000 (+0000)
Subject: Added functions for moving attributes in the chain.
X-Git-Tag: holmes-import~1263
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=47af8a9cb91d8935819285341953802eb8466540;p=libucw.git

Added functions for moving attributes in the chain.
---

diff --git a/lib/object.c b/lib/object.c
index 6f047863..fb957bd7 100644
--- a/lib/object.c
+++ b/lib/object.c
@@ -244,3 +244,43 @@ obj_insert_attr(struct odes *o, struct oattr *first, struct oattr *after, byte *
   after->same = b;
   return b;
 }
+
+void
+obj_move_attr_to_head(struct odes *o, uns x)
+{
+  struct oattr *a, **z;
+
+  z = &o->attrs;
+  while (a = *z)
+    {
+      if (a->attr == x)
+	{
+	  *z = a->next;
+	  a->next = o->attrs;
+	  o->attrs = a;
+	  break;
+	}
+      z = &a->next;
+    }
+}
+
+void
+obj_move_attr_to_tail(struct odes *o, uns x)
+{
+  struct oattr *a, **z;
+
+  z = &o->attrs;
+  while (a = *z)
+    {
+      if (a->attr == x)
+	{
+	  *z = a->next;
+	  while (*z)
+	    z = &(*z)->next;
+	  *z = a;
+	  a->next = NULL;
+	  break;
+	}
+      z = &a->next;
+    }
+}
diff --git a/lib/object.h b/lib/object.h
index c1a91798..34d2e71d 100644
--- a/lib/object.h
+++ b/lib/object.h
@@ -41,5 +41,7 @@ struct oattr *obj_set_attr_num(struct odes *, uns, uns);
 struct oattr *obj_add_attr(struct odes *, uns, byte *);
 struct oattr *obj_prepend_attr(struct odes *, uns, byte *);
 struct oattr *obj_insert_attr(struct odes *o, struct oattr *first, struct oattr *after, byte *v);
+void obj_move_attr_to_head(struct odes *o, uns);
+void obj_move_attr_to_tail(struct odes *o, uns);
 
 #endif