/* avl.h - avl tree definitions */
-/*
- * Copyright (c) 1993 Regents of the University of Michigan.
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2010 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * 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.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* this structure represents a generic avl tree node.
*/
-typedef struct avlnode {
- caddr_t avl_data;
+LDAP_BEGIN_DECL
+
+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)
/* balance factor values */
-#define LH -1
+#define LH (-1)
#define EH 0
#define RH 1
+#define avl_bf2str(bf) ((bf) == -1 ? "LH" : (bf) == 0 ? "EH" : (bf) == 1 ? "RH" : "(unknown)" )
+
+/* 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))
-/* looks like this function pointer is not used consistently */
-/* typedef int (*IFP)LDAP_P((caddr_t, caddr_t)); */
-typedef int (*IFP)();
+#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((const void*, const void*));
+typedef int (*AVL_DUP) LDAP_P((void*, void*));
+typedef void (*AVL_FREE) LDAP_P((void*));
+
+LDAP_AVL_F( int )
+avl_free LDAP_P(( Avlnode *root, AVL_FREE dfree ));
-LDAP_F int
-avl_insert LDAP_P((Avlnode **, caddr_t, IFP, IFP));
+LDAP_AVL_F( int )
+avl_insert LDAP_P((Avlnode **, void*, AVL_CMP, AVL_DUP));
-LDAP_F caddr_t
-avl_delete LDAP_P((Avlnode **, caddr_t, IFP));
+LDAP_AVL_F( void* )
+avl_delete LDAP_P((Avlnode **, void*, AVL_CMP));
-LDAP_F caddr_t
-avl_find LDAP_P((Avlnode *, caddr_t, IFP));
+LDAP_AVL_F( void* )
+avl_find LDAP_P((Avlnode *, const void*, AVL_CMP));
-LDAP_F caddr_t
+LDAP_AVL_F( Avlnode* )
+avl_find2 LDAP_P((Avlnode *, const void*, AVL_CMP));
+
+LDAP_AVL_F( void* )
+avl_find_lin LDAP_P((Avlnode *, const void*, AVL_CMP));
+
+#ifdef AVL_NONREENTRANT
+LDAP_AVL_F( void* )
avl_getfirst LDAP_P((Avlnode *));
-#ifdef AVL_REENTRANT
-LDAP_F caddr_t
-avl_getnext LDAP_P((Avlnode *, caddr_t ));
-#else
-LDAP_F caddr_t
+LDAP_AVL_F( void* )
avl_getnext LDAP_P((void));
#endif
-LDAP_F int
-avl_dup_error LDAP_P((void));
+LDAP_AVL_F( int )
+avl_dup_error LDAP_P((void*, void*));
+
+LDAP_AVL_F( int )
+avl_dup_ok LDAP_P((void*, void*));
+
+LDAP_AVL_F( int )
+avl_apply LDAP_P((Avlnode *, AVL_APPLY, void*, int, 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_F int
-avl_apply LDAP_P((Avlnode *, IFP, caddr_t, int, int));
+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));
+
+LDAP_AVL_F( Avlnode* )
+tavl_find3 LDAP_P((Avlnode *, const void*, AVL_CMP, int *ret));
+
+#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
#define AVL_POSTORDER 3
/* what apply returns if it ran out of nodes */
-#define AVL_NOMORE -6
+#define AVL_NOMORE (-6)
+
+LDAP_END_DECL
#endif /* _AVL */