| 1 | /* $Id: avl_Range.cpp.h 65208 2017-01-09 14:39:54Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * kAVLRange - Range routines for AVL trees.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 1999-2011 knut st. osmundsen ([email protected])
|
|---|
| 8 | *
|
|---|
| 9 | * Permission is hereby granted, free of charge, to any person
|
|---|
| 10 | * obtaining a copy of this software and associated documentation
|
|---|
| 11 | * files (the "Software"), to deal in the Software without
|
|---|
| 12 | * restriction, including without limitation the rights to use,
|
|---|
| 13 | * copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|---|
| 14 | * copies of the Software, and to permit persons to whom the
|
|---|
| 15 | * Software is furnished to do so, subject to the following
|
|---|
| 16 | * conditions:
|
|---|
| 17 | *
|
|---|
| 18 | * The above copyright notice and this permission notice shall be
|
|---|
| 19 | * included in all copies or substantial portions of the Software.
|
|---|
| 20 | *
|
|---|
| 21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|---|
| 22 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
|
|---|
| 23 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|---|
| 24 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
|
|---|
| 25 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
|
|---|
| 26 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|---|
| 27 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|---|
| 28 | * OTHER DEALINGS IN THE SOFTWARE.
|
|---|
| 29 | */
|
|---|
| 30 |
|
|---|
| 31 | #ifndef _kAVLRange_h_
|
|---|
| 32 | #define _kAVLRange_h_
|
|---|
| 33 |
|
|---|
| 34 | /**
|
|---|
| 35 | * Finds the range containing the specified key.
|
|---|
| 36 | *
|
|---|
| 37 | * @returns Pointer to the matching range.
|
|---|
| 38 | *
|
|---|
| 39 | * @param ppTree Pointer to Pointer to the tree root node.
|
|---|
| 40 | * @param Key The Key to find matching range for.
|
|---|
| 41 | */
|
|---|
| 42 | KAVL_DECL(PKAVLNODECORE) KAVL_FN(RangeGet)(PPKAVLNODECORE ppTree, register KAVLKEY Key)
|
|---|
| 43 | {
|
|---|
| 44 | register PKAVLNODECORE pNode = KAVL_GET_POINTER_NULL(ppTree);
|
|---|
| 45 | if (pNode)
|
|---|
| 46 | {
|
|---|
| 47 | for (;;)
|
|---|
| 48 | {
|
|---|
| 49 | if (KAVL_R_IS_IN_RANGE(pNode->Key, pNode->KeyLast, Key))
|
|---|
| 50 | return pNode;
|
|---|
| 51 | if (KAVL_G(pNode->Key, Key))
|
|---|
| 52 | {
|
|---|
| 53 | if (pNode->pLeft != KAVL_NULL)
|
|---|
| 54 | pNode = KAVL_GET_POINTER(&pNode->pLeft);
|
|---|
| 55 | else
|
|---|
| 56 | return NULL;
|
|---|
| 57 | }
|
|---|
| 58 | else
|
|---|
| 59 | {
|
|---|
| 60 | if (pNode->pRight != KAVL_NULL)
|
|---|
| 61 | pNode = KAVL_GET_POINTER(&pNode->pRight);
|
|---|
| 62 | else
|
|---|
| 63 | return NULL;
|
|---|
| 64 | }
|
|---|
| 65 | }
|
|---|
| 66 | }
|
|---|
| 67 |
|
|---|
| 68 | return NULL;
|
|---|
| 69 | }
|
|---|
| 70 |
|
|---|
| 71 |
|
|---|
| 72 | /**
|
|---|
| 73 | * Removes the range containing the specified key.
|
|---|
| 74 | *
|
|---|
| 75 | * @returns Pointer to the matching range.
|
|---|
| 76 | *
|
|---|
| 77 | * @param ppTree Pointer to Pointer to the tree root node.
|
|---|
| 78 | * @param Key The Key to remove matching range for.
|
|---|
| 79 | */
|
|---|
| 80 | RTDECL(PKAVLNODECORE) KAVL_FN(RangeRemove)(PPKAVLNODECORE ppTree, KAVLKEY Key)
|
|---|
| 81 | {
|
|---|
| 82 | PKAVLNODECORE pNode = KAVL_FN(RangeGet)(ppTree, Key);
|
|---|
| 83 | if (pNode)
|
|---|
| 84 | return KAVL_FN(Remove)(ppTree, pNode->Key);
|
|---|
| 85 | return NULL;
|
|---|
| 86 | }
|
|---|
| 87 |
|
|---|
| 88 | #endif
|
|---|
