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[openldap] / include / avl.h

diff --git a/include/avl.h b/include/avl.h
index 58b3d972dec206eddb27c9fbd02ca0e19263cc9e..6be27f7e258e1c067e3474f742b5c21595cd6a8e 100644 (file)
--- a/include/avl.h
+++ b/include/avl.h
@@ -1,14 +1,19 @@
-/*
- * Copyright 1998,1999 The OpenLDAP Foundation, Redwood City, California, USA
+/* avl.h - avl tree definitions */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2008 The OpenLDAP Foundation.
  * All rights reserved.
  *
- * Redistribution and use in source and binary forms are permitted only
- * as authorized by the OpenLDAP Public License.  A copy of this
- * license is available at http://www.OpenLDAP.org/license.html or
- * in file LICENSE in the top-level directory of the distribution.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
  */
-/* Portions
- * Copyright (c) 1993 Regents of the University of Michigan.
+/* Portions Copyright (c) 1993 Regents of the University of Michigan.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms are permitted
@@ -18,7 +23,6 @@
  * software without specific prior written permission. This software
  * is provided ``as is'' without express or implied warranty.
  */
-/* avl.h - avl tree definitions */
 
 
 #ifndef _AVL
@@ -32,12 +36,21 @@
 
 LDAP_BEGIN_DECL
 
-typedef struct avlnode {
+typedef struct avlnode Avlnode;
+
+struct avlnode {
        void*           avl_data;
+       struct avlnode  *avl_link[2];
+       char            avl_bits[2];
        signed char             avl_bf;
-       struct avlnode  *avl_left;
-       struct avlnode  *avl_right;
-} Avlnode;
+};
+
+#define avl_left       avl_link[0]
+#define avl_right      avl_link[1]
+#define avl_lbit       avl_bits[0]
+#define avl_rbit       avl_bits[1]
+
+#ifdef AVL_INTERNAL
 
 #define NULLAVL        ((Avlnode *) NULL)
 
@@ -46,50 +59,88 @@ typedef struct avlnode {
 #define EH     0
 #define RH     1
 
+/* thread bits */
+#define        AVL_THREAD      0
+#define        AVL_CHILD       1
+
 /* avl routines */
 #define avl_getone(x)  ((x) == 0 ? 0 : (x)->avl_data)
 #define avl_onenode(x) ((x) == 0 || ((x)->avl_left == 0 && (x)->avl_right == 0))
 
+#endif /* AVL_INTERNALS */
+
+#define        avl_child(x,dir)        ((x)->avl_bits[dir]) == AVL_CHILD ? \
+       (x)->avl_link[dir] : NULL
+#define        avl_lchild(x)   avl_child(x,0)
+#define        avl_rchild(x)   avl_child(x,1)
+
 typedef int            (*AVL_APPLY) LDAP_P((void *, void*));
-typedef int            (*AVL_CMP) LDAP_P((void*, void*));
+typedef int            (*AVL_CMP) LDAP_P((const void*, const void*));
 typedef int            (*AVL_DUP) LDAP_P((void*, void*));
 typedef void   (*AVL_FREE) LDAP_P((void*));
 
-LDAP_F( int )
+LDAP_AVL_F( int )
 avl_free LDAP_P(( Avlnode *root, AVL_FREE dfree ));
 
-LDAP_F( int )
+LDAP_AVL_F( int )
 avl_insert LDAP_P((Avlnode **, void*, AVL_CMP, AVL_DUP));
 
-LDAP_F( void* )
+LDAP_AVL_F( void* )
 avl_delete LDAP_P((Avlnode **, void*, AVL_CMP));
 
-LDAP_F( void* )
-avl_find LDAP_P((Avlnode *, void*, AVL_CMP));
+LDAP_AVL_F( void* )
+avl_find LDAP_P((Avlnode *, const void*, AVL_CMP));
+
+LDAP_AVL_F( Avlnode* )
+avl_find2 LDAP_P((Avlnode *, const void*, AVL_CMP));
 
-LDAP_F( void* )
-avl_find_lin LDAP_P((Avlnode *, void*, AVL_CMP));
+LDAP_AVL_F( void* )
+avl_find_lin LDAP_P((Avlnode *, const void*, AVL_CMP));
 
 #ifdef AVL_NONREENTRANT
-LDAP_F( void* )
+LDAP_AVL_F( void* )
 avl_getfirst LDAP_P((Avlnode *));
 
-LDAP_F( void* )
+LDAP_AVL_F( void* )
 avl_getnext LDAP_P((void));
 #endif
 
-LDAP_F( int )
+LDAP_AVL_F( int )
 avl_dup_error LDAP_P((void*, void*));
 
-LDAP_F( int )
+LDAP_AVL_F( int )
 avl_dup_ok LDAP_P((void*, void*));
 
-LDAP_F( int )
+LDAP_AVL_F( int )
 avl_apply LDAP_P((Avlnode *, AVL_APPLY, void*, int, int));
 
-LDAP_F( int )
+LDAP_AVL_F( int )
 avl_prefixapply LDAP_P((Avlnode *, void*, AVL_CMP, void*, AVL_CMP, void*, int));
 
+LDAP_AVL_F( int )
+tavl_free LDAP_P(( Avlnode *root, AVL_FREE dfree ));
+
+LDAP_AVL_F( int )
+tavl_insert LDAP_P((Avlnode **, void*, AVL_CMP, AVL_DUP));
+
+LDAP_AVL_F( void* )
+tavl_delete LDAP_P((Avlnode **, void*, AVL_CMP));
+
+LDAP_AVL_F( void* )
+tavl_find LDAP_P((Avlnode *, const void*, AVL_CMP));
+
+LDAP_AVL_F( Avlnode* )
+tavl_find2 LDAP_P((Avlnode *, const void*, AVL_CMP));
+
+#define        TAVL_DIR_LEFT   0
+#define        TAVL_DIR_RIGHT  1
+
+LDAP_AVL_F( Avlnode* )
+tavl_end LDAP_P((Avlnode *, int direction ));
+
+LDAP_AVL_F( Avlnode* )
+tavl_next LDAP_P((Avlnode *, int direction ));
+
 /* apply traversal types */
 #define AVL_PREORDER   1
 #define AVL_INORDER    2