This is my library of lists and trees. My hope is to replace all of the

hard coded linked lists that are currently used in Samba with calls to
these modules.  This should make the code simpler, smaller, and (I hope)
faster.  The tree code, in particular, should speed up processing where
large lists are involved.

Chris -)-----
(This used to be commit e789179dfda669bd768720cb3732cf56a49027b5)

1 files changed, 152 insertions, 0 deletions

diff --git a/source3/ubi_dLinkList.c b/source3/ubi_dLinkList.c
new file mode 100644
index 0000000000..9c9ef3a73d
--- /dev/null
+++ b/source3/ubi_dLinkList.c
@@ -0,0 +1,152 @@
+/* ========================================================================== **
+ *                              ubi_dLinkList.c
+ *
+ *  Copyright (C) 1997 by Christopher R. Hertel
+ *
+ *  Email: crh@ubiqx.mn.org
+ * -------------------------------------------------------------------------- **
+ *  This module implements simple doubly-linked lists.
+ * -------------------------------------------------------------------------- **
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, 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
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public
+ *  License along with this library; if not, write to the Free
+ *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * -------------------------------------------------------------------------- **
+ *
+ * $Log: ubi_dLinkList.c,v $
+ * Revision 1.1  1997/10/09 04:09:55  crh
+ * This is my library of lists and trees.  My hope is to replace all of the
+ * hard coded linked lists that are currently used in Samba with calls to
+ * these modules.  This should make the code simpler, smaller, and (I hope)
+ * faster.  The tree code, in particular, should speed up processing where
+ * large lists are involved.
+ *
+ * Chris -)-----
+ *
+ * Revision 0.2  1997/10/08 03:07:21  crh
+ * Fixed a few forgotten link-ups in Insert(), and fixed the AddHead()
+ * macro, which was passing the wrong value for <After> to Insert().
+ *
+ * Revision 0.1  1997/10/07 04:34:07  crh
+ * Initial Revision.
+ *
+ *
+ * ========================================================================== **
+ */
+
+#include "ubi_dLinkList.h"
+
+/* ========================================================================== **
+ * Functions...
+ */
+
+ubi_dlListPtr ubi_dlInitList( ubi_dlListPtr ListPtr )
+  /* ------------------------------------------------------------------------ **
+   * Initialize a doubly-linked list header.
+   *
+   *  Input:  ListPtr - A pointer to the list structure that is to be
+   *                    initialized for use.
+   *
+   *  Output: A pointer to the initialized list header (i.e., same as
+   *          <ListPtr>).
+   *
+   * ------------------------------------------------------------------------ **
+   */
+  {
+  ListPtr->Head  = NULL;
+  ListPtr->Tail  = NULL;
+  ListPtr->count = 0;
+  return( ListPtr );
+  } /* ubi_dlInitList */
+
+ubi_dlNodePtr ubi_dlInsert( ubi_dlListPtr ListPtr,
+                            ubi_dlNodePtr New,
+                            ubi_dlNodePtr After )
+  /* ------------------------------------------------------------------------ **
+   * Insert a new node into the list.
+   *
+   *  Input:  ListPtr - A pointer to the list into which the node is to
+   *                    be inserted.
+   *          New     - Pointer to the new node.
+   *          After   - NULL, or a pointer to a node that is already in the
+   *                    list.
+   *                    If NULL, then <New> will be added at the head of the
+   *                    list, else it will be added following <After>.
+   * 
+   *  Output: A pointer to the node that was inserted into the list (i.e.,
+   *          the same as <New>).
+   *
+   * ------------------------------------------------------------------------ **
+   */
+  {
+  if( NULL == After )
+    {
+    New->Next           = ListPtr->Head;
+    New->Prev           = NULL;
+    if( NULL != ListPtr->Head )
+      ListPtr->Head->Prev = New;
+    else
+      ListPtr->Tail       = New;
+    ListPtr->Head       = New;
+    }
+  else
+    {
+    New->Next         = After->Next;
+    New->Prev         = After;
+    if( NULL != After->Next )
+      After->Next->Prev = New;
+    else
+      ListPtr->Tail       = New;
+    After->Next       = New;
+    }
+
+  ++(ListPtr->count);
+
+  return( New );
+  } /* ubi_dlInsert */
+
+ubi_dlNodePtr ubi_dlRemove( ubi_dlListPtr ListPtr, ubi_dlNodePtr Old )
+  /* ------------------------------------------------------------------------ **
+   * Remove a node from the list.
+   *
+   *  Input:  ListPtr - A pointer to the list from which <Old> is to be
+   *                    removed.
+   *          Old     - A pointer to the node that is to be removed from the
+   *                    list.
+   *
+   *  Output: A pointer to the node that was removed (i.e., <Old>).
+   *
+   * ------------------------------------------------------------------------ **
+   */
+  {
+  if( NULL != Old )
+    {
+    if( Old->Next )
+      Old->Next->Prev = Old->Prev;
+    else
+      ListPtr->Tail = Old->Prev;
+
+    if( Old->Prev )
+      Old->Prev->Next = Old->Next;
+    else
+      ListPtr->Head = Old->Next;
+
+    --(ListPtr->count);
+    }
+
+  return( Old );
+  } /* ubi_dlRemove */
+
+
+/* ================================ The End ================================= */