diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/H5TB.c | 87 |
1 files changed, 52 insertions, 35 deletions
@@ -1,7 +1,18 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * Copyright by the Board of Trustees of the University of Illinois. * + * All rights reserved. * + * * + * This file is part of HDF5. The full HDF5 copyright notice, including * + * terms governing use, modification, and redistribution, is contained in * + * the files COPYING and Copyright.html. COPYING can be found at the root * + * of the source code distribution tree; Copyright.html can be found at the * + * root level of an installed copy of the electronic HDF5 document set and * + * is linked from the top-level documents page. It can also be found at * + * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have * + * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + /* - * Copyright (C) 2000-2001 NCSA - * All rights reserved. - * * Programmer: Quincey Koziol <koziol@ncsa.uiuc.edu> * Saturday, April 22, 2000 * @@ -9,11 +20,13 @@ * Extended from (added threads to) Knuth 6.2.3, Algorithm A (AVL trees) * Basic tree structure by Adel'son-Vel'skii and Landis * - * These routines are designed to allow use of a general-purpose balanced tree - * implimentation. These trees are appropriate for maintaining in memory one - * or more lists of items, each list sorted according to key values (key values - * must form a "completely ordered set") where no two items in a single list - * can have the same key value. The following operations are supported: + * These routines are designed to allow use of a general-purpose balanced + * tree implimentation. These trees are appropriate for maintaining in + * memory one or more lists of items, each list sorted according to key + * values (key values must form a "completely ordered set") where no two + * items in a single list can have the same key value. The following + * operations are supported: + * * Create an empty list * Add an item to a list * Look up an item in a list by key value @@ -21,32 +34,36 @@ * Delete an item from a list * Find the first/last/next/previous item in a list * Destroy a list - * Each of the above operations requires Order(log(N)) time where N is the - * number of items in the list (except for list creation which requires - * constant time and list destruction which requires Order(N) time if the user- - * supplied free-data-item or free-key-value routines require constant time). - * Each of the above operations (except create and destroy) can be performed - * on a subtree. - * - * Each node of a tree has associated with it a generic pointer (void *) which - * is set to point to one such "item" and a generic pointer to point to that - * item's "key value". The structure of the items and key values is up to the - * user to define. The user must specify a method for comparing key values. - * This routine takes three arguments, two pointers to key values and a third - * integer argument. You can specify a routine that expects pointers to "data - * items" rather than key values in which case the pointer to the key value in - * each node will be set equal to the pointer to the data item. - * - * Since the "data item" pointer is the first field of each tree node, these - * routines may be used without this "tbbt.h" file. For example, assume "ITM" - * is the structre definition for the data items you want to store in lists: + * + * Each of the above operations requires Order(log(N)) time where N is + * the number of items in the list (except for list creation which + * requires constant time and list destruction which requires Order(N) + * time if the user- supplied free-data-item or free-key-value routines + * require constant time). Each of the above operations (except create + * and destroy) can be performed on a subtree. + * + * Each node of a tree has associated with it a generic pointer (void *) + * which is set to point to one such "item" and a generic pointer to + * point to that item's "key value". The structure of the items and key + * values is up to the user to define. The user must specify a method + * for comparing key values. This routine takes three arguments, two + * pointers to key values and a third integer argument. You can specify + * a routine that expects pointers to "data items" rather than key values + * in which case the pointer to the key value in each node will be set + * equal to the pointer to the data item. + * + * Since the "data item" pointer is the first field of each tree node, + * these routines may be used without this "tbbt.h" file. For example, + * assume "ITM" is the structre definition for the data items you want to + * store in lists: + * * ITM ***H5TB_dmake( int (*cmp)(void *,void *,int), int arg ); * ITM **root= NULL; (* How to create an empty tree w/o H5TB_dmake() *) * ITM **H5TB_dfind( ITM ***tree, void *key, ITM ***pp ); * ITM **H5TB_find( ITM **root, void *key, int (*cmp)(), int arg, ITM ***pp ); * ITM **H5TB_dless( ITM ***tree, void *key, ITM ***pp ); * ITM **H5TB_less( ITM **root, void *key, int (*cmp)(), int arg, ITM ***pp ); - * ITM **H5TB_indx( ITM **root, long indx ); + * ITM **H5TB_index( ITM **root, long indx ); * ITM **H5TB_dins( ITM ***tree, ITM *item, void *key ); * ITM **H5TB_ins( ITM ***root, ITM *item, void *key, int (*cmp)(), int arg ); * ITM *H5TB_rem( ITM ***root, ITM **node, void **kp ); @@ -102,11 +119,11 @@ static int interface_initialize_g = 0; * (H5TB_dfind, H5TB_dins, H5TB_dfree) on them. * Examples: * int keycmp(); - * H5TB_ROOT *root= H5TB_dmake( keycmp, (int)keysiz , 0); + * H5TB_TREE *tree = H5TB_dmake( keycmp, (int)keysiz , 0); * or - * void *root= H5TB_dmake( strcmp, 0 , 0); + * void *tree= H5TB_dmake( strcmp, 0 , 0); * or - * void *root= H5TB_dmake( keycmp, (int)keysiz , H5TB_FAST_HADDR_COMPARE); + * void *tree= H5TB_dmake( keycmp, (int)keysiz , H5TB_FAST_HADDR_COMPARE); * or * H5TB_NODE *root= NULL; (* Don't use H5TB_d* routines *) * @@ -124,10 +141,10 @@ static int interface_initialize_g = 0; * kind of assumption). You can also use a key comparison routine that expects * pointers to data items rather than key values. * - * The "fast compare" option is for keys of simple numeric types (currently - * haddr_t and int) and avoids the function call for faster searches in - * some cases. The key comparison routine is still required for some - * insertion routines which use it. + * The "fast compare" option is for keys of simple numeric types + * (currently haddr_t and int) and avoids the function call for faster + * searches in some cases. The key comparison routine is still required + * for some insertion routines which use it. * * Most of the other routines expect a pointer to a root node of a tree, not * a pointer to the tree's control structure (only H5TB_dfind(), H5TB_dins(), |