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822 lines
25 KiB
C
822 lines
25 KiB
C
/*
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* Parallel Sparse BLAS v2.0
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* (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
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* Alfredo Buttari University of Rome Tor Vergata
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions, and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the PSBLAS group or the names of its contributors may
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* not be used to endorse or promote products derived from this
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* software without specific written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/*****************************************************************/
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/* */
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/* avltree.c: balanced AVL tree search and insertion */
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/* written by: Salvatore Filippone */
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/* */
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/* Last updated: Mar 09 2004 */
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/* */
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/* Referrences: [1] D. E. Knuth */
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/* The Art of Computer Programming */
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/* Vol. 3: Sorting and Searching, sec. 6.2.3 */
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/* Addison-Wesley */
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/* */
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/* General description: */
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/* */
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/* Build and maintain a balanced binary search tree with */
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/* arbitrary keys. The user is responsible for providing */
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/* compare functions operating on the keys themselves. */
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/* Key pointers are stored into nodes that are managed */
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/* by the subroutine calls; the user should never examine */
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/* nodes directly. */
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/* The nodes for user items are allocated in batches, */
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/* and the batches are kept as a doubly linked list. */
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/* */
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/* Data types: */
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/* AVLTree: structure containing pointers to the list */
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/* of node batches and to the root of the binary tree */
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/* structure */
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/* */
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/* AVLNode: binary tree node, containing link pointers */
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/* a reserved field, and a pointer to user data */
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/* */
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/* */
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/* User callable functions: */
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/* */
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/* AVLTreePtr GetAVLTree() */
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/* Purpose: allocate a new tree; */
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/* Function value: a fresh AVL tree pointer; */
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/* returns NULL in case of a memory failure*/
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/* */
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/* */
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/* int AVLTreeReInit(AVLTreePtr Tree) */
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/* Purpose: reinitialize an existing AVL Tree, reusing */
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/* node batches already allocated. */
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/* Input: 1. Tree */
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/* A pointer to an existing tree structure */
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/* Function value: 0 Normal termination */
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/* -1 Invalid input pointer */
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/* -3 Memory allocation failure */
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/* */
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/* AVLNodePtr AVLTreeSearch(AVLTreePtr Tree, void *key, */
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/* int (*comp)(void*, void*)) */
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/* Purpose: search an existing AVL Tree for a key */
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/* Input: 1. Tree */
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/* A valid pointer to a Tree */
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/* 2. key */
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/* The item being searched for */
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/* 3. comp */
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/* A comparison function: */
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/* a<b => comp(a,b)<0 */
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/* a==b => comp(a,b)=0 */
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/* a>b => comp(a,b)>0 */
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/* The function is always invoked as: */
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/* comp(user_key,tree_key); */
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/* */
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/* */
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/* Function value: NULL: input error or item not found */
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/* valid pointer: pointer to a node */
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/* containing the key */
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/* */
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/* int AVLTreeInsert(AVLTreePtr Tree, void *key, */
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/* int (*comp)(void*,void*), */
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/* void (*update)(void*,void*,void*), */
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/* void *data) */
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/* Purpose: Insert an item into an existing (possibly */
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/* empty) tree. */
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/* */
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/* Input: 1. Tree */
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/* The (existing) tree */
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/* 2. key */
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/* The (new) item to be inserted */
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/* 3. comp */
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/* comparison function (as in AVLTreeSearch) */
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/* 4. update */
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/* A user provided function to be called when */
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/* the key is already present in the tree */
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/* with the calling sequence: */
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/* update(new_key,existing_key) */
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/* enables the user to specify an arbitrary */
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/* update procedure. */
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/* */
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/* */
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/* */
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/* AVLNodePtr AVLTreeUserInsert(AVLTreePtr Tree, void *key, */
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/* int (*comp)(void*,void*)) */
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/* */
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/* Purpose: Insert an item into an existing (possibly */
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/* empty) tree; returns a pointer to a node */
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/* containing the item, even when that node */
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/* was already existing; does no update */
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/* */
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/* Input: 1. Tree */
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/* The (existing) tree */
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/* 2. key */
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/* The (new) item to be inserted */
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/* 3. comp */
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/* comparison function (as in AVLTreeSearch) */
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/* */
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/* Function value: Valid pointer: pointer to a node */
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/* containing the item (possibly */
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/* was already there) */
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/* NULL input error or memory failure */
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/* */
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/* */
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/* int HowManyKeys(AVLTreePtr Tree) */
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/* Purpose: how many keys does Tree contain? */
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/* Function value: >=0 */
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/* */
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/* */
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/* void AVLTreeInorderTraverse(AVLTreePtr Tree, */
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/* void (*func)( void*, void*), void *data) */
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/* */
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/* Purpose: visit the nodes of the binary tree in their */
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/* natural order, performing an arbitrary */
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/* task upon visit. */
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/* Input: 1. Tree */
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/* A tree pointer */
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/* 2. func */
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/* A function performing a user specified */
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/* task on each node; the fuction is invoked as */
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/* func( key,data) */
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/* where data is parm. 3 */
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/* 3. data */
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/* Auxiliary data to be passed to func upon */
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/* each visit */
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/* */
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/* int AVLTreeInorderTraverseWithDelims(AVLTreePtr Tree, */
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/* void *first, void *last, int (*comp)(void*,void*) */
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/* void (*func)( void*, void*), void *data) */
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/* */
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/* Purpose: visit the nodes of the binary tree in their */
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/* natural order, performing an arbitrary */
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/* task upon visit, but only on nodes */
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/* with their key within a specified range. */
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/* */
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/* Input: 1. Tree */
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/* A tree pointer */
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/* 2. first */
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/* Visit nodes with first <= node->key */
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/* 3. last */
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/* Visit nodes with node->key <= last */
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/* 4. comp */
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/* comparison function (as in AVLTreeSearch) */
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/* 5. func */
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/* A function performing a user specified */
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/* task on each node; the fuction is invoked as */
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/* func( key,data) */
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/* where data is parm. 3 */
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/* 6. data */
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/* Auxiliary data to be passed to func upon */
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/* each visit */
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/* Function value: total number of nodes visited (>=0) */
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/* */
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/* */
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/* */
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/* void AVLTreeFree(AVLTreePtr Tree, void (*ffree)(void*)) */
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/* Purpose: free up tree data storage */
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/* Does NOT free the Tree pointer itself, */
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/* rather all the structures that it points to */
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/* Input: 1. Tree */
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/* A tree pointer */
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/* 2. ffree */
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/* A user specified function invoked on each */
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/* key pointer contained in the tree to free */
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/* its memory (if necessary). Can be NULL. */
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/* */
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/* */
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/*****************************************************************/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "avltree.h"
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#define POOLSIZE 1024
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#define MAXSTACK 64
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#define MAX(a,b) ((a)>=(b) ? (a) : (b))
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typedef struct avltvect {
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AVLNode pool[POOLSIZE];
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int avail;
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AVLTVectPtr previous, next;
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} AVLTVect;
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int HowManyItems(AVLTreePtr Tree)
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{
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if (Tree==NULL) {
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return(0);
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} else {
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return(Tree->nnodes);
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}
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}
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AVLTreePtr GetAVLTree()
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{
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AVLTreePtr tree;
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if ((tree=(AVLTreePtr) malloc(sizeof(AVLTree)))!=NULL){
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memset(tree,'\0',sizeof(AVLTree));
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AVLTreeInit(tree);
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}
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return(tree);
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}
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int AVLTreeInit(AVLTreePtr Tree)
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{
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/* AVLTVectPtr current; */
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if (Tree==NULL) {
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fprintf(stderr,"Cannot initialize a NULL Tree pointer\n");
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return(-1);
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}
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if (Tree->first!=NULL) {
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fprintf(stderr,"Cannot initialize a nonempty Tree: call AVLTreeFree first\n");
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return(-2);
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}
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/* if ((current=(AVLTVectPtr)malloc(sizeof(AVLTVect)))==NULL) { */
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/* fprintf(stderr,"Memory allocation failure\n"); */
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/* return(-3); */
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/* } */
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/* memset(current,'\0',sizeof(AVLTVect)); */
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Tree->first=Tree->current=NULL;
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Tree->nnodes=0;
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Tree->root=NULL;
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return(0);
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}
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int AVLTreeReInit(AVLTreePtr Tree)
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{
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AVLTVectPtr current /* , next */ ;
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if (Tree==NULL) {
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fprintf(stderr,"Cannot ReInitialize a NULL Tree pointer\n");
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return(-1);
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}
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if (Tree->first!=NULL) {
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current=Tree->first;
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while (current!=NULL) {
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current->avail=0;
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memset(current->pool,'\0',POOLSIZE*sizeof(AVLNode));
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current=current->next;
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}
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} else {
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if ((current=(AVLTVectPtr)malloc(sizeof(AVLTVect)))==NULL) {
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fprintf(stderr,"Memory allocation failure\n");
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return(-3);
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}
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current->avail=0;
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current->previous=current->next=NULL;
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Tree->first=current;
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}
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Tree->current=Tree->first;
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Tree->nnodes=0;
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Tree->root=NULL;
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return(0);
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}
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AVLNodePtr AVLTreeSearch(AVLTreePtr Tree, void *key,
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int (*comp)(void *, void *))
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{
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AVLNodePtr current;
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int icmp;
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if (Tree==NULL) return(NULL);
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current = Tree->root;
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#ifdef PROFILE
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Tree->nsteps=0;
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#endif
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while (current != NULL) {
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icmp = (*comp)(key,current->key);
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#ifdef PROFILE
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Tree->nsteps +=1;
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#endif
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if (icmp<0) {
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current = current->llink;
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} else if (icmp==0){
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return(current);
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} else if (icmp>0) {
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current = current->rlink;
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}
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}
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return(current);
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}
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void AVLTreeInorderTraverse(AVLTreePtr Tree, void (*func)(void *, void *),
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void *data)
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{
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int lev;
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AVLNodePtr root;
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AVLNodePtr stack[MAXSTACK+2];
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int choice[MAXSTACK+2];
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root=Tree->root;
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if (root == NULL) return;
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lev=0;
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stack[lev] = root;
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choice[lev] = -1;
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while (lev>=0) {
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if (stack[lev]==NULL) {
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lev--;
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} else {
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if (choice[lev]==-1) {
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stack[lev+1] = stack[lev]->llink;
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choice[lev+1] = -1;
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choice[lev] += 1;
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lev++;
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} else if (choice[lev]==0) {
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(*func)(stack[lev]->key,data);
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stack[lev+1] = stack[lev]->rlink;
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choice[lev+1] = -1;
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choice[lev] += 1;
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lev++;
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} else {
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lev--;
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}
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}
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}
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}
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int AVLTreeInorderTraverseWithDelims(AVLTreePtr Tree, void *first, void *last,
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int (*comp)(void*, void*),
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void (*func)(void *, void *),
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void *data)
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{
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AVLNodePtr root, current;
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int lev, nvisit, icmp;
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AVLNodePtr stack[MAXSTACK+2];
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int choice[MAXSTACK+2];
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root=Tree->root;
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if (root == NULL) return(0);
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nvisit=0;
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lev=0;
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current = root;
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while (current != NULL) {
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stack[lev] = current;
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icmp = (*comp)(first,current->key);
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if (icmp<=0) {
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choice[lev]=0;
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current = current->llink;
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} else if (icmp>0) {
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current = current->rlink;
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choice[lev]=1;
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}
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lev++;
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}
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lev--;
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while (lev>=0) {
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if (stack[lev]==NULL) {
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lev--;
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} else {
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if (choice[lev]==-1) {
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stack[lev+1] = stack[lev]->llink;
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choice[lev+1] = -1;
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choice[lev] += 1;
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lev++;
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} else if (choice[lev]==0) {
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if (((*comp)(last,stack[lev]->key))<0) {
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lev--;
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} else {
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(*func)(stack[lev]->key,data);
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nvisit++;
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stack[lev+1] = stack[lev]->rlink;
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choice[lev+1] = -1;
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choice[lev] += 1;
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lev++;
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}
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} else {
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lev--;
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}
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}
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}
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return(nvisit);
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}
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void AVLTreePreorderTraverse(AVLTreePtr Tree, void (*func)(void *, void *),
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void *data)
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{
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AVLNodePtr root;
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int lev;
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AVLNodePtr stack[MAXSTACK+2];
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int choice[MAXSTACK+2];
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root=Tree->root;
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if (root == NULL) return;
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lev=0;
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stack[lev] = root;
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choice[lev] = -1;
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while (lev>=0) {
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if (stack[lev]==NULL) {
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lev--;
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} else {
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if (choice[lev]==-1) {
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(*func)(stack[lev]->key,data);
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stack[lev+1] = stack[lev]->llink;
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choice[lev+1] = -1;
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choice[lev] += 1;
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lev++;
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} else if (choice[lev]==0) {
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stack[lev+1] = stack[lev]->rlink;
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choice[lev+1] = -1;
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choice[lev] += 1;
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lev++;
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} else {
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lev--;
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}
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}
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}
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}
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void AVLTreeFree(AVLTreePtr Tree, void (*ffree)(void *))
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{
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AVLTVectPtr current, next;
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int i;
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if (Tree == NULL) return;
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current=Tree->first;
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|
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while (current != NULL) {
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next=current->next;
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if (*ffree != NULL) {
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for (i=0; i<current->avail; i++)
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(*ffree)((current->pool[i]).key);
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}
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free(current);
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current=next;
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}
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Tree->nnodes=0;
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Tree->first=Tree->current=NULL;
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return;
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}
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|
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AVLNodePtr GetAVLNode(AVLTreePtr Tree)
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{
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AVLTVectPtr current, new;
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AVLNodePtr newnode;
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if (Tree==NULL) {
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return(NULL);
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}
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if ((current=Tree->current)==NULL) {
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if ((current=(AVLTVectPtr)malloc(sizeof(AVLTVect)))==NULL) {
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fprintf(stderr,"Memory allocation failure\n");
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return(NULL);
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}
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memset(current,'\0',sizeof(AVLTVect));
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Tree->first=Tree->current=current;
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}
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while ((current->avail>=POOLSIZE)&&(current->next!=NULL))
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current=current->next;
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if (current->avail<POOLSIZE) {
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newnode=&(current->pool[current->avail]);
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current->avail += 1;
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} else {
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if ((new=(AVLTVectPtr)malloc(sizeof(AVLTVect)))==NULL) {
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fprintf(stderr,"Memory allocation failure\n");
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return(NULL);
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}
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memset(new,'\0',sizeof(AVLTVect));
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newnode=&(new->pool[0]);
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new->avail = 1;
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current->next=new;
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new->previous=current;
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new->next=NULL;
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Tree->current=new;
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}
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return(newnode);
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}
|
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|
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int AVLTreeInsert(AVLTreePtr Tree, void *key,int (*comp)(void *, void *),
|
|
void (*update)(void *, void *, void *), void *data)
|
|
{
|
|
AVLNodePtr root, t, s, p, q, r;
|
|
int search, bal, icmp;
|
|
|
|
if (Tree==NULL) {
|
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fprintf(stderr,"Fatal error: null tree pointer\n");
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return(-1);
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}
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|
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if ((root = Tree->root) == NULL) {
|
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if ((t=GetAVLNode(Tree))==NULL) {
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return(-2);
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}
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t->key = key;
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t->rlink=t->llink=NULL;
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t->bal=0;
|
|
Tree->root = t;
|
|
Tree->nnodes=1;
|
|
return(0);
|
|
}
|
|
t = NULL;
|
|
s = root;
|
|
p = root;
|
|
search=1;
|
|
while (search) {
|
|
icmp = (*comp)(key,p->key);
|
|
if (icmp<0) {
|
|
if ((q=p->llink)==NULL) {
|
|
if ((q=GetAVLNode(Tree))==NULL) {
|
|
return(-2);
|
|
}
|
|
p->llink=q;
|
|
search=0;
|
|
} else {
|
|
if (q->bal != 0) {
|
|
t=p;
|
|
s=q;
|
|
}
|
|
}
|
|
} else if (icmp == 0) {
|
|
(*update)(key,p->key,data);
|
|
return(1);
|
|
} else {
|
|
if ((q=p->rlink)==NULL) {
|
|
if ((q=GetAVLNode(Tree))==NULL) {
|
|
return(-2);
|
|
}
|
|
p->rlink=q;
|
|
search=0;
|
|
} else {
|
|
if (q->bal != 0) {
|
|
t=p;
|
|
s=q;
|
|
}
|
|
}
|
|
}
|
|
p=q;
|
|
}
|
|
q->key=key;
|
|
q->llink=q->rlink=NULL;
|
|
q->bal=0;
|
|
Tree->nnodes += 1;
|
|
|
|
if ((*comp)(key,s->key)<0) {
|
|
r=p=s->llink;
|
|
} else {
|
|
r=p=s->rlink;
|
|
}
|
|
|
|
while (p!=q) {
|
|
if ((*comp)(key,p->key)<0) {
|
|
p->bal=-1;
|
|
p = p->llink;
|
|
} else {
|
|
p->bal=1;
|
|
p=p->rlink;
|
|
}
|
|
}
|
|
|
|
if ((*comp)(key,s->key)<0) {
|
|
bal=-1;
|
|
} else {
|
|
bal=1;
|
|
}
|
|
|
|
if (s->bal == 0) {
|
|
s->bal=bal;
|
|
return (0);
|
|
} else if (s->bal == -bal) {
|
|
s->bal=0;
|
|
return (0);
|
|
} else if (s->bal == bal) {
|
|
|
|
if (r->bal == bal) {
|
|
/* single rotation */
|
|
p=r;
|
|
if (bal>0) {
|
|
s->rlink=r->llink;
|
|
r->llink=s;
|
|
} else {
|
|
s->llink=r->rlink;
|
|
r->rlink=s;
|
|
}
|
|
s->bal=r->bal=0;
|
|
} else if (r->bal == -bal) {
|
|
/* double rotation */
|
|
if (bal>0) {
|
|
p=r->llink;
|
|
r->llink=p->rlink;
|
|
p->rlink=r;
|
|
s->rlink=p->llink;
|
|
p->llink=s;
|
|
} else {
|
|
p=r->rlink;
|
|
r->rlink=p->llink;
|
|
p->llink=r;
|
|
s->llink=p->rlink;
|
|
p->rlink=s;
|
|
}
|
|
if (p->bal == bal) {
|
|
s->bal=-bal;
|
|
r->bal=0;
|
|
} else if (p->bal==0) {
|
|
s->bal=r->bal=0;
|
|
} else {
|
|
r->bal=bal;
|
|
s->bal=0;
|
|
}
|
|
p->bal=0;
|
|
}
|
|
if (t==NULL) {
|
|
root=p;
|
|
} else {
|
|
if (t->rlink==s) {
|
|
t->rlink=p;
|
|
} else {
|
|
t->llink=p;
|
|
}
|
|
}
|
|
Tree->root=root;
|
|
return(0);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
AVLNodePtr AVLTreeUserInsert(AVLTreePtr Tree, void *key,
|
|
int (*comp)(void *, void *))
|
|
{
|
|
AVLNodePtr root, t, s, p, q, r;
|
|
int search, bal, icmp;
|
|
|
|
if (Tree==NULL) {
|
|
fprintf(stderr,"Fatal error: null tree pointer\n");
|
|
return(NULL);
|
|
}
|
|
|
|
if ((root = Tree->root) == NULL) {
|
|
if ((t=GetAVLNode(Tree))==NULL) {
|
|
return(NULL);
|
|
}
|
|
t->key = key;
|
|
t->rlink=t->llink=NULL;
|
|
t->bal=0;
|
|
Tree->root = t;
|
|
Tree->nnodes=1;
|
|
return(t);
|
|
}
|
|
t = NULL;
|
|
s = root;
|
|
p = root;
|
|
search=1;
|
|
while (search) {
|
|
icmp = (*comp)(key,p->key);
|
|
if (icmp<0) {
|
|
if ((q=p->llink)==(AVLNodePtr) NULL) {
|
|
if ((q=GetAVLNode(Tree))==NULL) {
|
|
return(NULL);
|
|
}
|
|
p->llink=q;
|
|
search=0;
|
|
} else {
|
|
if (q->bal != 0) {
|
|
t=p;
|
|
s=q;
|
|
}
|
|
}
|
|
} else if (icmp == 0) {
|
|
return(p);
|
|
} else {
|
|
if ((q=p->rlink)==NULL) {
|
|
if ((q=GetAVLNode(Tree))==NULL) {
|
|
return(NULL);
|
|
}
|
|
p->rlink=q;
|
|
search=0;
|
|
} else {
|
|
if (q->bal != 0) {
|
|
t=p;
|
|
s=q;
|
|
}
|
|
}
|
|
}
|
|
p=q;
|
|
}
|
|
q->key=key;
|
|
q->llink=q->rlink=NULL;
|
|
q->bal=0;
|
|
Tree->nnodes += 1;
|
|
|
|
if ((*comp)(key,s->key)<0) {
|
|
r=p=s->llink;
|
|
} else {
|
|
r=p=s->rlink;
|
|
}
|
|
|
|
while (p!=q) {
|
|
if ((*comp)(key,p->key)<0) {
|
|
p->bal=-1;
|
|
p = p->llink;
|
|
} else {
|
|
p->bal=1;
|
|
p=p->rlink;
|
|
}
|
|
}
|
|
|
|
if ((*comp)(key,s->key)<0) {
|
|
bal=-1;
|
|
} else {
|
|
bal=1;
|
|
}
|
|
|
|
if (s->bal == 0) {
|
|
s->bal=bal;
|
|
return (q);
|
|
} else if (s->bal == -bal) {
|
|
s->bal=0;
|
|
return (q);
|
|
} else if (s->bal == bal) {
|
|
|
|
if (r->bal == bal) {
|
|
/* single rotation */
|
|
p=r;
|
|
if (bal>0) {
|
|
s->rlink=r->llink;
|
|
r->llink=s;
|
|
} else {
|
|
s->llink=r->rlink;
|
|
r->rlink=s;
|
|
}
|
|
s->bal=r->bal=0;
|
|
} else if (r->bal == -bal) {
|
|
/* double rotation */
|
|
if (bal>0) {
|
|
p=r->llink;
|
|
r->llink=p->rlink;
|
|
p->rlink=r;
|
|
s->rlink=p->llink;
|
|
p->llink=s;
|
|
} else {
|
|
p=r->rlink;
|
|
r->rlink=p->llink;
|
|
p->llink=r;
|
|
s->llink=p->rlink;
|
|
p->rlink=s;
|
|
}
|
|
if (p->bal == bal) {
|
|
s->bal=-bal;
|
|
r->bal=0;
|
|
} else if (p->bal==0) {
|
|
s->bal=r->bal=0;
|
|
} else {
|
|
r->bal=bal;
|
|
s->bal=0;
|
|
}
|
|
p->bal=0;
|
|
}
|
|
if (t==NULL) {
|
|
root=p;
|
|
} else {
|
|
if (t->rlink==s) {
|
|
t->rlink=p;
|
|
} else {
|
|
t->llink=p;
|
|
}
|
|
}
|
|
Tree->root=root;
|
|
return(q);
|
|
}
|
|
return(q);
|
|
}
|
|
|