| 1 | /* $Id: avl_Range.cpp.h 28800 2010-04-27 08:22:32Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * kAVLRange - Range routines for AVL trees.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 1999-2006 knut st. osmundsen ([email protected])
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | *
|
|---|
| 17 | * The contents of this file may alternatively be used under the terms
|
|---|
| 18 | * of the Common Development and Distribution License Version 1.0
|
|---|
| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
|---|
| 20 | * VirtualBox OSE distribution, in which case the provisions of the
|
|---|
| 21 | * CDDL are applicable instead of those of the GPL.
|
|---|
| 22 | *
|
|---|
| 23 | * You may elect to license modified versions of this file under the
|
|---|
| 24 | * terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 25 | */
|
|---|
| 26 |
|
|---|
| 27 | #ifndef _kAVLRange_h_
|
|---|
| 28 | #define _kAVLRange_h_
|
|---|
| 29 |
|
|---|
| 30 | /**
|
|---|
| 31 | * Finds the range containing the specified key.
|
|---|
| 32 | *
|
|---|
| 33 | * @returns Pointer to the matching range.
|
|---|
| 34 | *
|
|---|
| 35 | * @param ppTree Pointer to Pointer to the tree root node.
|
|---|
| 36 | * @param Key The Key to find matching range for.
|
|---|
| 37 | */
|
|---|
| 38 | RTDECL(PKAVLNODECORE) KAVL_FN(RangeGet)(PPKAVLNODECORE ppTree, register KAVLKEY Key)
|
|---|
| 39 | {
|
|---|
| 40 | register PKAVLNODECORE pNode = KAVL_GET_POINTER_NULL(ppTree);
|
|---|
| 41 | if (pNode)
|
|---|
| 42 | {
|
|---|
| 43 | for (;;)
|
|---|
| 44 | {
|
|---|
| 45 | if (KAVL_R_IS_IN_RANGE(pNode->Key, pNode->KeyLast, Key))
|
|---|
| 46 | return pNode;
|
|---|
| 47 | if (KAVL_G(pNode->Key, Key))
|
|---|
| 48 | {
|
|---|
| 49 | if (pNode->pLeft != KAVL_NULL)
|
|---|
| 50 | pNode = KAVL_GET_POINTER(&pNode->pLeft);
|
|---|
| 51 | else
|
|---|
| 52 | return NULL;
|
|---|
| 53 | }
|
|---|
| 54 | else
|
|---|
| 55 | {
|
|---|
| 56 | if (pNode->pRight != KAVL_NULL)
|
|---|
| 57 | pNode = KAVL_GET_POINTER(&pNode->pRight);
|
|---|
| 58 | else
|
|---|
| 59 | return NULL;
|
|---|
| 60 | }
|
|---|
| 61 | }
|
|---|
| 62 | }
|
|---|
| 63 |
|
|---|
| 64 | return NULL;
|
|---|
| 65 | }
|
|---|
| 66 |
|
|---|
| 67 |
|
|---|
| 68 | /**
|
|---|
| 69 | * Removes the range containing the specified key.
|
|---|
| 70 | *
|
|---|
| 71 | * @returns Pointer to the matching range.
|
|---|
| 72 | *
|
|---|
| 73 | * @param ppTree Pointer to Pointer to the tree root node.
|
|---|
| 74 | * @param Key The Key to remove matching range for.
|
|---|
| 75 | */
|
|---|
| 76 | RTDECL(PKAVLNODECORE) KAVL_FN(RangeRemove)(PPKAVLNODECORE ppTree, KAVLKEY Key)
|
|---|
| 77 | {
|
|---|
| 78 | PKAVLNODECORE pNode = KAVL_FN(RangeGet)(ppTree, Key);
|
|---|
| 79 | if (pNode)
|
|---|
| 80 | return KAVL_FN(Remove)(ppTree, pNode->Key);
|
|---|
| 81 | return NULL;
|
|---|
| 82 | }
|
|---|
| 83 |
|
|---|
| 84 | #endif
|
|---|
