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Diffstat (limited to 'source3/ubi_AVLtree.c')
| -rw-r--r-- | source3/ubi_AVLtree.c | 699 |
1 files changed, 0 insertions, 699 deletions
diff --git a/source3/ubi_AVLtree.c b/source3/ubi_AVLtree.c deleted file mode 100644 index 730392a472..0000000000 --- a/source3/ubi_AVLtree.c +++ /dev/null @@ -1,699 +0,0 @@ -/* ========================================================================== ** - * ubi_AVLtree.c - * - * Copyright (C) 1991-1997 by Christopher R. Hertel - * - * Email: crh@ubiqx.mn.org - * -------------------------------------------------------------------------- ** - * - * This module provides an implementation of AVL height balanced binary - * trees. (Adelson-Velskii, Landis 1962) - * - * This file implements the core of the height-balanced (AVL) tree management - * routines. The header file, ubi_AVLtree.h, contains function prototypes - * for all "exported" functions. - * - * -------------------------------------------------------------------------- ** - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library 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 - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * -------------------------------------------------------------------------- ** - * - * $Log: ubi_AVLtree.c,v $ - * Revision 1.1 1997/10/09 04:09:51 crh - * This is my library of lists and trees. My hope is to replace all of the - * hard coded linked lists that are currently used in Samba with calls to - * these modules. This should make the code simpler, smaller, and (I hope) - * faster. The tree code, in particular, should speed up processing where - * large lists are involved. - * - * Chris -)----- - * - * Revision 2.4 1997/07/26 04:36:20 crh - * Andrew Leppard, aka "Grazgur", discovered that I still had my brains tied - * on backwards with respect to node deletion. I did some more digging and - * discovered that I was not changing the balance values correctly in the - * single rotation functions. Double rotation was working correctly because - * the formula for changing the balance values is the same for insertion or - * deletion. Not so for single rotation. - * - * I have tested the fix by loading the tree with over 44 thousand names, - * deleting 2,629 of them (all those in which the second character is 'u') - * and then walking the tree recursively to verify that the balance factor of - * each node is correct. Passed. - * - * Thanks Andrew! - * - * Also: - * + Changed ubi_TRUE and ubi_FALSE to ubi_trTRUE and ubi_trFALSE. - * + Rewrote the ubi_tr<func> macros because they weren't doing what I'd - * hoped they would do (see the bottom of the header file). They work now. - * - * Revision 2.3 1997/06/03 04:41:35 crh - * Changed TRUE and FALSE to ubi_TRUE and ubi_FALSE to avoid causing - * problems. - * - * Revision 2.2 1995/10/03 22:16:01 CRH - * Ubisized! - * - * Revision 2.1 95/03/09 23:45:59 CRH - * Added the ModuleID static string and function. These modules are now - * self-identifying. - * - * Revision 2.0 95/03/05 14:10:51 CRH - * This revision of ubi_AVLtree coincides with revision 2.0 of ubi_BinTree, - * and so includes all of the changes to that module. In addition, a bug in - * the node deletion process has been fixed. - * - * After rewriting the Locate() function in ubi_BinTree, I decided that it was - * time to overhaul this module. In the process, I discovered a bug related - * to node deletion. To fix the bug, I wrote function Debalance(). A quick - * glance will show that it is very similar to the Rebalance() function. In - * previous versions of this module, I tried to include the functionality of - * Debalance() within Rebalance(), with poor results. - * - * Revision 1.0 93/10/15 22:58:56 CRH - * With this revision, I have added a set of #define's that provide a single, - * standard API to all existing tree modules. Until now, each of the three - * existing modules had a different function and typedef prefix, as follows: - * - * Module Prefix - * ubi_BinTree ubi_bt - * ubi_AVLtree ubi_avl - * ubi_SplayTree ubi_spt - * - * To further complicate matters, only those portions of the base module - * (ubi_BinTree) that were superceeded in the new module had the new names. - * For example, if you were using ubi_AVLtree, the AVL node structure was - * named "ubi_avlNode", but the root structure was still "ubi_btRoot". Using - * SplayTree, the locate function was called "ubi_sptLocate", but the next - * and previous functions remained "ubi_btNext" and "ubi_btPrev". - * - * This was not too terrible if you were familiar with the modules and knew - * exactly which tree model you wanted to use. If you wanted to be able to - * change modules (for speed comparisons, etc), things could get messy very - * quickly. - * - * So, I have added a set of defined names that get redefined in any of the - * descendant modules. To use this standardized interface in your code, - * simply replace all occurances of "ubi_bt", "ubi_avl", and "ubi_spt" with - * "ubi_tr". The "ubi_tr" names will resolve to the correct function or - * datatype names for the module that you are using. Just remember to - * include the header for that module in your program file. Because these - * names are handled by the preprocessor, there is no added run-time - * overhead. - * - * Note that the original names do still exist, and can be used if you wish - * to write code directly to a specific module. This should probably only be - * done if you are planning to implement a new descendant type, such as - * red/black trees. CRH - * - * V0.0 - May, 1990 - Written by Christopher R. Hertel (CRH). - * - * ========================================================================= ** - */ - -#include "ubi_AVLtree.h" /* Header for THIS module. */ -#include <stdlib.h> /* Standard C definitions, etc. */ - -/* ========================================================================== ** - * Static data. - */ - -static char ModuleID[] = "ubi_AVLtree\n\ -\t$Revision: 1.1 $\n\ -\t$Date: 1997/10/09 04:09:51 $\n\ -\t$Author: crh $\n"; - -/* ========================================================================== ** - * The next set of functions are the AVL balancing routines. There are left - * and right, single and double rotations. The rotation routines handle the - * rotations and reconnect all tree pointers that might get confused by the - * rotations. A pointer to the new subtree root node is returned. - * - * Note that L1 and R1 are identical, except that all the RIGHTs and LEFTs - * are reversed. The same is true for L2 and R2. I'm sure that there is - * a clever way to reduce the amount of code by combining these functions, - * but it might involve additional overhead, and it would probably be a pain - * to read, debug, etc. - * -------------------------------------------------------------------------- ** - */ - -static ubi_avlNodePtr L1( ubi_avlNodePtr p ) - /* ------------------------------------------------------------------------ ** - * Single rotate left. - * - * Input: p - Pointer to the root of a tree (possibly a subtree). - * Output: A pointer to the new root of the same subtree (now that node - * p has been moved). - * ------------------------------------------------------------------------ ** - */ - { - ubi_avlNodePtr tmp; - - tmp = p->Link[RIGHT]; - p->Link[RIGHT] = tmp->Link[LEFT]; - tmp->Link[LEFT] = p; - - tmp->Link[PARENT] = p->Link[PARENT]; - tmp->gender = p->gender; - if(tmp->Link[PARENT]) - (tmp->Link[PARENT])->Link[(tmp->gender)] = tmp; - p->Link[PARENT] = tmp; - p->gender = LEFT; - if( p->Link[RIGHT] ) - { - p->Link[RIGHT]->Link[PARENT] = p; - (p->Link[RIGHT])->gender = RIGHT; - } - p->balance -= Normalize( tmp->balance ); - (tmp->balance)--; - return( tmp ); - } /* L1 */ - -static ubi_avlNodePtr R1( ubi_avlNodePtr p ) - /* ------------------------------------------------------------------------ ** - * Single rotate right. - * - * Input: p - Pointer to the root of a tree (possibly a subtree). - * Output: A pointer to the new root of the same subtree (now that node - * p has been moved). - * ------------------------------------------------------------------------ ** - */ - { - ubi_avlNodePtr tmp; - - tmp = p->Link[LEFT]; - p->Link[LEFT] = tmp->Link[RIGHT]; - tmp->Link[RIGHT] = p; - - tmp->Link[PARENT] = p->Link[PARENT]; - tmp->gender = p->gender; - if(tmp->Link[PARENT]) - (tmp->Link[PARENT])->Link[(tmp->gender)] = tmp; - p->Link[PARENT] = tmp; - p->gender = RIGHT; - if(p->Link[LEFT]) - { - p->Link[LEFT]->Link[PARENT] = p; - p->Link[LEFT]->gender = LEFT; - } - p->balance -= Normalize( tmp->balance ); - (tmp->balance)++; - return( tmp ); - } /* R1 */ - -static ubi_avlNodePtr L2( ubi_avlNodePtr tree ) - /* ------------------------------------------------------------------------ ** - * Double rotate left. - * - * Input: p - Pointer to the root of a tree (possibly a subtree). - * Output: A pointer to the new root of the same subtree (now that node - * p has been moved). - * ------------------------------------------------------------------------ ** - */ - { - ubi_avlNodePtr tmp, newroot; - - tmp = tree->Link[RIGHT]; - newroot = tmp->Link[LEFT]; - tmp->Link[LEFT] = newroot->Link[RIGHT]; - newroot->Link[RIGHT] = tmp; - tree->Link[RIGHT] = newroot->Link[LEFT]; - newroot->Link[LEFT] = tree; - - newroot->Link[PARENT] = tree->Link[PARENT]; - newroot->gender = tree->gender; - tree->Link[PARENT] = newroot; - tree->gender = LEFT; - tmp->Link[PARENT] = newroot; - tmp->gender = RIGHT; - - if( tree->Link[RIGHT] ) - { - tree->Link[RIGHT]->Link[PARENT] = tree; - tree->Link[RIGHT]->gender = RIGHT; - } - if( tmp->Link[LEFT] ) - { - tmp->Link[LEFT]->Link[PARENT] = tmp; - tmp->Link[LEFT]->gender = LEFT; - } - if(newroot->Link[PARENT]) - newroot->Link[PARENT]->Link[newroot->gender] = newroot; - - switch( newroot->balance ) - { - case LEFT : - tree->balance = EQUAL; tmp->balance = RIGHT; break; - case EQUAL: - tree->balance = EQUAL; tmp->balance = EQUAL; break; - case RIGHT: - tree->balance = LEFT; tmp->balance = EQUAL; break; - } - newroot->balance = EQUAL; - return( newroot ); - } /* L2 */ - -static ubi_avlNodePtr R2( ubi_avlNodePtr tree ) - /* ------------------------------------------------------------------------ ** - * Double rotate right. - * - * Input: p - Pointer to the root of a tree (possibly a subtree). - * Output: A pointer to the new root of the same subtree (now that node - * p has been moved). - * ------------------------------------------------------------------------ ** - */ - { - ubi_avlNodePtr tmp, newroot; - - tmp = tree->Link[LEFT]; - newroot = tmp->Link[RIGHT]; - tmp->Link[RIGHT] = newroot->Link[LEFT]; - newroot->Link[LEFT] = tmp; - tree->Link[LEFT] = newroot->Link[RIGHT]; - newroot->Link[RIGHT] = tree; - - newroot->Link[PARENT] = tree->Link[PARENT]; - newroot->gender = tree->gender; - tree->Link[PARENT] = newroot; - tree->gender = RIGHT; - tmp->Link[PARENT] = newroot; - tmp->gender = LEFT; - - if( tree->Link[LEFT] ) - { - tree->Link[LEFT]->Link[PARENT] = tree; - tree->Link[LEFT]->gender = LEFT; - } - if( tmp->Link[RIGHT] ) - { - tmp->Link[RIGHT]->Link[PARENT] = tmp; - tmp->Link[RIGHT]->gender = RIGHT; - } - if(newroot->Link[PARENT]) - newroot->Link[PARENT]->Link[newroot->gender] = newroot; - - switch( newroot->balance ) - { - case LEFT : - tree->balance = RIGHT; tmp->balance = EQUAL; break; - case EQUAL : - tree->balance = EQUAL; tmp->balance = EQUAL; break; - case RIGHT : - tree->balance = EQUAL; tmp->balance = LEFT; break; - } - newroot->balance = EQUAL; - return( newroot ); - } /* R2 */ - - -static ubi_avlNodePtr Adjust( ubi_avlNodePtr p, char LorR ) - /* ------------------------------------------------------------------------ ** - * Adjust the balance value at node *p. If necessary, rotate the subtree - * rooted at p. - * - * Input: p - A pointer to the node to be adjusted. One of the - * subtrees of this node has changed height, so the - * balance value at this node must be adjusted, possibly - * by rotating the tree at this node. - * LorR - Indicates the TALLER subtree. - * - * Output: A pointer to the (possibly new) root node of the subtree. - * - * Notes: This function may be called after a node has been added *or* - * deleted, so LorR indicates the TALLER subtree. - * ------------------------------------------------------------------------ ** - */ - { - if( p->balance != LorR ) - p->balance += Normalize(LorR); - else - { - char tallerbal; /* Balance value of the root of the taller subtree of p. */ - - tallerbal = p->Link[LorR]->balance; - if( ( EQUAL == tallerbal ) || ( p->balance == tallerbal ) ) - p = ( (LEFT==LorR) ? R1(p) : L1(p) ); /* single rotation */ - else - p = ( (LEFT==LorR) ? R2(p) : L2(p) ); /* double rotation */ - } - return( p ); - } /* Adjust */ - -static ubi_avlNodePtr Rebalance( ubi_avlNodePtr Root, - ubi_avlNodePtr subtree, - char LorR ) - /* ------------------------------------------------------------------------ ** - * Rebalance the tree following an insertion. - * - * Input: Root - A pointer to the root node of the whole tree. - * subtree - A pointer to the node that has just gained a new - * child. - * LorR - Gender of the child that has just been gained. - * - * Output: A pointer to the (possibly new) root of the AVL tree. - * Rebalancing the tree moves nodes around a bit, so the node - * that *was* the root, may not be the root when we're finished. - * - * Notes: Rebalance() must walk up the tree from where we are (which is - * where the latest change occurred), rebalancing the subtrees - * along the way. The rebalancing operation can stop if the - * change at the current subtree root won't affect the rest of - * the tree. In the case of an addition, if a subtree root's - * balance becomes EQUAL, then we know that the height of that - * subtree has not changed, so we can exit. - * ------------------------------------------------------------------------ ** - */ - { - while( subtree ) - { - subtree = Adjust( subtree, LorR ); - if( PARENT == subtree->gender ) - return( subtree ); - if( EQUAL == subtree->balance ) - return( Root ); - LorR = subtree->gender; - subtree = subtree->Link[PARENT]; - } - return( Root ); - } /* Rebalance */ - -static ubi_avlNodePtr Debalance( ubi_avlNodePtr Root, - ubi_avlNodePtr subtree, - char LorR ) - /* ------------------------------------------------------------------------ ** - * Rebalance the tree following a deletion. - * - * Input: Root - A pointer to the root node of the whole tree. - * subtree - A pointer to the node who's child has just "left the - * nest". - * LorR - Gender of the child that left. - * - * Output: A pointer to the (possibly new) root of the AVL tree. - * Rebalancing the tree moves nodes around a bit, so the node - * that *was* the root, may not be the root when we're finished. - * - * Notes: Debalance() is subtly different from Rebalance() (above) in - * two respects. - * * When it calls Adjust(), it passes the *opposite* of LorR. - * This is because LorR, as passed into Debalance() indicates - * the shorter subtree. As we move up the tree, LorR is - * assigned the gender of the node that we are leaving (i.e., - * the subtree that we just rebalanced). - * * We know that a subtree has not changed height if the - * balance becomes LEFT or RIGHT. This is the *opposite* of - * what happens in Rebalance(). - * ------------------------------------------------------------------------ ** - */ - { - while( subtree ) - { - subtree = Adjust( subtree, RevWay(LorR) ); - if( PARENT == subtree->gender ) - return( subtree ); - if( EQUAL != subtree->balance ) - return( Root ); - LorR = subtree->gender; - subtree = subtree->Link[PARENT]; - } - return( Root ); - } /* Debalance */ - - -/* -------------------------------------------------------------------------- ** - * The next two functions are used for general tree manipulation. They are - * each slightly different from their ubi_BinTree counterparts. - * -------------------------------------------------------------------------- ** - */ - -static void ReplaceNode( ubi_avlNodePtr *parent, - ubi_avlNodePtr oldnode, - ubi_avlNodePtr newnode ) - /* ------------------------------------------------------------------------ ** - * Remove node oldnode from the tree, replacing it with node newnode. - * - * Input: - * parent - A pointer to he parent pointer of the node to be - * replaced. <parent> may point to the Link[] field of - * a parent node, or it may indicate the root pointer at - * the top of the tree. - * oldnode - A pointer to the node that is to be replaced. - * newnode - A pointer to the node that is to be installed in the - * place of <*oldnode>. - * - * Notes: Don't forget to free oldnode. - * The only difference between this function and the ubi_bt - * version is that the node size is sizeof( ubi_avlNode ), not - * sizeof( ubi_btNode ). - * ------------------------------------------------------------------------ ** - */ - { - register int i; - register int avlNodeSize = sizeof( ubi_avlNode ); - - for( i = 0; i < avlNodeSize; i++ ) - ((unsigned char *)newnode)[i] = ((unsigned char *)oldnode)[i]; - (*parent) = newnode; - - if(oldnode->Link[LEFT ] ) - (oldnode->Link[LEFT ])->Link[PARENT] = newnode; - if(oldnode->Link[RIGHT] ) - (oldnode->Link[RIGHT])->Link[PARENT] = newnode; - } /* ReplaceNode */ - -static void SwapNodes( ubi_btRootPtr RootPtr, - ubi_avlNodePtr Node1, - ubi_avlNodePtr Node2 ) - /* ------------------------------------------------------------------------ ** - * This function swaps two nodes in the tree. Node1 will take the place of - * Node2, and Node2 will fill in the space left vacant by Node 1. - * - * Input: - * RootPtr - pointer to the tree header structure for this tree. - * Node1 - \ - * > These are the two nodes which are to be swapped. - * Node2 - / - * - * Notes: - * This function does a three step swap, using a dummy node as a place - * holder. This function is used by ubi_avlRemove(). - * The only difference between this function and its ubi_bt counterpart - * is that the nodes are ubi_avlNodes, not ubi_btNodes. - * ------------------------------------------------------------------------ ** - */ - { - ubi_avlNodePtr *Parent; - ubi_avlNode dummy; - ubi_avlNodePtr dummy_p = &dummy; - - if( Node1->Link[PARENT] ) - Parent = &((Node1->Link[PARENT])->Link[Node1->gender]); - else - Parent = (ubi_avlNodePtr *)&(RootPtr->root); - ReplaceNode( Parent, Node1, dummy_p ); - - if( Node2->Link[PARENT] ) - Parent = &((Node2->Link[PARENT])->Link[Node2->gender]); - else - Parent = (ubi_avlNodePtr *)&(RootPtr->root); - ReplaceNode( Parent, Node2, Node1 ); - - if( dummy_p->Link[PARENT] ) - Parent = &((dummy_p->Link[PARENT])->Link[dummy_p->gender]); - else - Parent = (ubi_avlNodePtr *)&(RootPtr->root); - ReplaceNode( Parent, dummy_p, Node2 ); - } /* SwapNodes */ - - -/* ========================================================================== ** - * Public, exported (ie. not static-ly declared) functions... - * -------------------------------------------------------------------------- ** - */ - -ubi_avlNodePtr ubi_avlInitNode( ubi_avlNodePtr NodePtr ) - /* ------------------------------------------------------------------------ ** - * Initialize a tree node. - * - * Input: NodePtr - pointer to a ubi_btNode structure to be - * initialized. - * Output: a pointer to the initialized ubi_avlNode structure (ie. the - * same as the input pointer). - * ------------------------------------------------------------------------ ** - */ - { - (void)ubi_btInitNode( (ubi_btNodePtr)NodePtr ); - NodePtr->balance = EQUAL; - return( NodePtr ); - } /* ubi_avlInitNode */ - -ubi_trBool ubi_avlInsert( ubi_btRootPtr RootPtr, - ubi_avlNodePtr NewNode, - ubi_btItemPtr ItemPtr, - ubi_avlNodePtr *OldNode ) - /* ------------------------------------------------------------------------ ** - * This function uses a non-recursive algorithm to add a new element to - * the tree. - * - * Input: RootPtr - a pointer to the ubi_btRoot structure that indicates - * the root of the tree to which NewNode is to be added. - * NewNode - a pointer to an ubi_avlNode structure that is NOT - * part of any tree. - * ItemPtr - A pointer to the sort key that is stored within - * *NewNode. ItemPtr MUST point to information stored - * in *NewNode or an EXACT DUPLICATE. The key data - * indicated by ItemPtr is used to place the new node - * into the tree. - * OldNode - a pointer to an ubi_btNodePtr. When searching - * the tree, a duplicate node may be found. If - * duplicates are allowed, then the new node will - * be simply placed into the tree. If duplicates - * are not allowed, however, then one of two things - * may happen. - * 1) if overwritting *is not* allowed, this - * function will return FALSE (indicating that - * the new node could not be inserted), and - * *OldNode will point to the duplicate that is - * still in the tree. - * 2) if overwritting *is* allowed, then this - * function will swap **OldNode for *NewNode. - * In this case, *OldNode will point to the node - * that was removed (thus allowing you to free - * the node). - * ** If you are using overwrite mode, ALWAYS ** - * ** check the return value of this parameter! ** - * Note: You may pass NULL in this parameter, the - * function knows how to cope. If you do this, - * however, there will be no way to return a - * pointer to an old (ie. replaced) node (which is - * a problem if you are using overwrite mode). - * - * Output: a boolean value indicating success or failure. The function - * will return FALSE if the node could not be added to the tree. - * Such failure will only occur if duplicates are not allowed, - * nodes cannot be overwritten, AND a duplicate key was found - * within the tree. - * ------------------------------------------------------------------------ ** - */ - { - ubi_avlNodePtr OtherP; - - if( !(OldNode) ) OldNode = &OtherP; - if( ubi_btInsert( RootPtr, - (ubi_btNodePtr)NewNode, - ItemPtr, - (ubi_btNodePtr *)OldNode ) ) - { - if( (*OldNode) ) - NewNode->balance = (*OldNode)->balance; - else - { - NewNode->balance = EQUAL; - RootPtr->root = (ubi_btNodePtr)Rebalance( (ubi_avlNodePtr)RootPtr->root, - NewNode->Link[PARENT], - NewNode->gender ); - } - return( ubi_trTRUE ); - } - return( ubi_trFALSE ); /* Failure: could not replace an existing node. */ - } /* ubi_avlInsert */ - -ubi_avlNodePtr ubi_avlRemove( ubi_btRootPtr RootPtr, - ubi_avlNodePtr DeadNode ) - /* ------------------------------------------------------------------------ ** - * This function removes the indicated node from the tree, after which the - * tree is rebalanced. - * - * Input: RootPtr - A pointer to the header of the tree that contains - * the node to be removed. - * DeadNode - A pointer to the node that will be removed. - * - * Output: This function returns a pointer to the node that was removed - * from the tree (ie. the same as DeadNode). - * - * Note: The node MUST be in the tree indicated by RootPtr. If not, - * strange and evil things will happen to your trees. - * ------------------------------------------------------------------------ ** - */ - { - ubi_btNodePtr p, - *parentp; - - /* if the node has both left and right subtrees, then we have to swap - * it with another node. - */ - if( (DeadNode->Link[LEFT]) && (DeadNode->Link[RIGHT]) ) - SwapNodes( RootPtr, DeadNode, ubi_trPrev( DeadNode ) ); - - /* The parent of the node to be deleted may be another node, or it may be - * the root of the tree. Since we're not sure, it's best just to have - * a pointer to the parent pointer, whatever it is. - */ - if( DeadNode->Link[PARENT] ) - parentp = (ubi_btNodePtr *) - &((DeadNode->Link[PARENT])->Link[(DeadNode->gender)]); - else - parentp = &( RootPtr->root ); - - /* Now link the parent to the only grand-child. Patch up the gender and - * such, and rebalance. - */ - if( EQUAL == DeadNode->balance ) - (*parentp) = NULL; - else - { - p = (ubi_btNodePtr)(DeadNode->Link[(DeadNode->balance)]); - p->Link[PARENT] = (ubi_btNodePtr)DeadNode->Link[PARENT]; - p->gender = DeadNode->gender; - (*parentp) = p; - } - RootPtr->root = (ubi_btNodePtr)Debalance( (ubi_avlNodePtr)RootPtr->root, - DeadNode->Link[PARENT], - DeadNode->gender ); - - (RootPtr->count)--; - return( DeadNode ); - } /* ubi_avlRemove */ - -int ubi_avlModuleID( int size, char *list[] ) - /* ------------------------------------------------------------------------ ** - * Returns a set of strings that identify the module. - * - * Input: size - The number of elements in the array <list>. - * list - An array of pointers of type (char *). This array - * should, initially, be empty. This function will fill - * in the array with pointers to strings. - * Output: The number of elements of <list> that were used. If this value - * is less than <size>, the values of the remaining elements are - * not guaranteed. - * - * Notes: Please keep in mind that the pointers returned indicate strings - * stored in static memory. Don't free() them, don't write over - * them, etc. Just read them. - * ------------------------------------------------------------------------ ** - */ - { - if( size > 0 ) - { - list[0] = ModuleID; - if( size > 1 ) - return( 1 + ubi_btModuleID( --size, &(list[1]) ) ); - return( 1 ); - } - return( 0 ); - } /* ubi_avlModuleID */ - -/* ============================== The End ============================== */ |