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Diffstat (limited to 'avl-1.4.0/avl.h')
-rw-r--r-- | avl-1.4.0/avl.h | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/avl-1.4.0/avl.h b/avl-1.4.0/avl.h deleted file mode 100644 index 436a461..0000000 --- a/avl-1.4.0/avl.h +++ /dev/null @@ -1,148 +0,0 @@ -/* libavl - manipulates AVL trees. - Copyright (C) 1998, 1999 Free Software Foundation, Inc. - - This program is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - This program 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 - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA - 02111-1307, USA. - - The author may be contacted at <pfaffben@pilot.msu.edu> on the - Internet, or as Ben Pfaff, 12167 Airport Rd, DeWitt MI 48820, USA - through more mundane means. */ - -/* This is file avl.h in libavl. */ - -#if !avl_h -#define avl_h 1 - -/* The default maximum height of 32 allows for AVL trees having - between 5,704,880 and 4,294,967,295 nodes, depending on order of - insertion. You may change this compile-time constant as you - wish. */ -#ifndef AVL_MAX_HEIGHT -#define AVL_MAX_HEIGHT 32 -#endif - -/* Structure for a node in an AVL tree. */ -typedef struct avl_node - { - void *data; /* Pointer to data. */ - struct avl_node *link[2]; /* Subtrees. */ - signed char bal; /* Balance factor. */ - char cache; /* Used during insertion. */ - signed char pad[2]; /* Unused. Reserved for threaded trees. */ - } -avl_node; - -/* Used for traversing an AVL tree. */ -typedef struct avl_traverser - { - int init; /* Initialized? */ - int nstack; /* Top of stack. */ - const avl_node *p; /* Used for traversal. */ - const avl_node *stack[AVL_MAX_HEIGHT];/* Descended trees. */ - } -avl_traverser; - -/* Initializer for avl_traverser. */ -#define AVL_TRAVERSER_INIT {0} - -/* Function types. */ -#if !AVL_FUNC_TYPES -#define AVL_FUNC_TYPES 1 -typedef int (*avl_comparison_func) (const void *a, const void *b, void *param); -typedef void (*avl_node_func) (void *data, void *param); -typedef void *(*avl_copy_func) (void *data, void *param); -#endif - -/* Structure which holds information about an AVL tree. */ -typedef struct avl_tree - { -#if PSPP - struct arena **owner; /* Arena to store nodes. */ -#endif - avl_node root; /* Tree root node. */ - avl_comparison_func cmp; /* Used to compare keys. */ - int count; /* Number of nodes in the tree. */ - void *param; /* Arbitary user data. */ - } -avl_tree; - -#if PSPP -#define MAYBE_ARENA struct arena **owner, -#else -#define MAYBE_ARENA /* nothing */ -#endif - -/* General functions. */ -avl_tree *avl_create (MAYBE_ARENA avl_comparison_func, void *param); -void avl_destroy (avl_tree *, avl_node_func); -void avl_free (avl_tree *); -int avl_count (const avl_tree *); -avl_tree *avl_copy (MAYBE_ARENA const avl_tree *, avl_copy_func); - -/* Walk the tree. */ -void avl_walk (const avl_tree *, avl_node_func, void *param); -void *avl_traverse (const avl_tree *, avl_traverser *); -#define avl_init_traverser(TRAVERSER) ((TRAVERSER)->init = 0) - -/* Search for a given item. */ -void **avl_probe (avl_tree *, void *); -void *avl_delete (avl_tree *, const void *); -void *avl_find (const avl_tree *, const void *); -void *avl_find_close (const avl_tree *, const void *); - -#if __GCC__ >= 2 -extern inline void * -avl_insert (avl_tree *tree, void *item) -{ - void **p = avl_probe (tree, item); - return (*p == item) ? NULL : *p; -} - -extern inline void * -avl_replace (avl_tree *tree, void *item) -{ - void **p = avl_probe (tree, item); - if (*p == item) - return NULL; - else - { - void *r = *p; - *p = item; - return r; - } -} -#else /* not gcc */ -void *avl_insert (avl_tree *tree, void *item); -void *avl_replace (avl_tree *tree, void *item); -#endif /* not gcc */ - -/* Easy assertions on insertion & deletion. */ -#ifndef NDEBUG -#define avl_force_insert(A, B) \ - do \ - { \ - void *r = avl_insert (A, B); \ - assert (r == NULL); \ - } \ - while (0) -void *avl_force_delete (avl_tree *, void *); -#else -#define avl_force_insert(A, B) \ - avl_insert (A, B) -#define avl_force_delete(A, B) \ - avl_delete (A, B) -#endif - -#endif /* avl_h */ |