Mercurial > hg > CbC > CbC_gcc
annotate include/fibheap.h @ 158:494b0b89df80 default tip
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| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 25 May 2020 18:13:55 +0900 |
| parents | 1830386684a0 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* A Fibonacci heap datatype. |
| 145 | 2 Copyright (C) 1998-2020 Free Software Foundation, Inc. |
| 0 | 3 Contributed by Daniel Berlin (dan@cgsoftware.com). |
| 4 | |
| 5 This file is part of GCC. | |
| 6 | |
| 7 GCC is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by | |
| 9 the Free Software Foundation; either version 2, or (at your option) | |
| 10 any later version. | |
| 11 | |
| 12 GCC is distributed in the hope that it will be useful, but | |
| 13 WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 General Public License for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with GCC; see the file COPYING. If not, write to | |
| 19 the Free Software Foundation, 51 Franklin Street - Fifth Floor, | |
| 20 Boston, MA 02110-1301, USA. */ | |
| 21 | |
| 22 /* Fibonacci heaps are somewhat complex, but, there's an article in | |
| 23 DDJ that explains them pretty well: | |
| 24 | |
| 25 http://www.ddj.com/articles/1997/9701/9701o/9701o.htm?topic=algoritms | |
| 26 | |
| 27 Introduction to algorithms by Corman and Rivest also goes over them. | |
| 28 | |
| 29 The original paper that introduced them is "Fibonacci heaps and their | |
| 30 uses in improved network optimization algorithms" by Tarjan and | |
| 31 Fredman (JACM 34(3), July 1987). | |
| 32 | |
| 33 Amortized and real worst case time for operations: | |
| 34 | |
| 35 ExtractMin: O(lg n) amortized. O(n) worst case. | |
| 36 DecreaseKey: O(1) amortized. O(lg n) worst case. | |
| 37 Insert: O(2) amortized. O(1) actual. | |
| 38 Union: O(1) amortized. O(1) actual. */ | |
| 39 | |
| 40 #ifndef _FIBHEAP_H_ | |
| 41 #define _FIBHEAP_H_ | |
| 42 | |
| 43 #include "ansidecl.h" | |
| 44 | |
|
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45 #ifdef __cplusplus |
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46 extern "C" { |
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47 #endif |
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48 |
| 0 | 49 typedef long fibheapkey_t; |
| 50 | |
| 51 typedef struct fibheap | |
| 52 { | |
| 53 size_t nodes; | |
| 54 struct fibnode *min; | |
| 55 struct fibnode *root; | |
| 56 } *fibheap_t; | |
| 57 | |
| 58 typedef struct fibnode | |
| 59 { | |
| 60 struct fibnode *parent; | |
| 61 struct fibnode *child; | |
| 62 struct fibnode *left; | |
| 63 struct fibnode *right; | |
| 64 fibheapkey_t key; | |
| 65 void *data; | |
| 66 #if defined (__GNUC__) && (!defined (SIZEOF_INT) || SIZEOF_INT < 4) | |
| 67 __extension__ unsigned long int degree : 31; | |
| 68 __extension__ unsigned long int mark : 1; | |
| 69 #else | |
| 70 unsigned int degree : 31; | |
| 71 unsigned int mark : 1; | |
| 72 #endif | |
| 73 } *fibnode_t; | |
| 74 | |
| 75 extern fibheap_t fibheap_new (void); | |
| 76 extern fibnode_t fibheap_insert (fibheap_t, fibheapkey_t, void *); | |
| 77 extern int fibheap_empty (fibheap_t); | |
| 78 extern fibheapkey_t fibheap_min_key (fibheap_t); | |
| 79 extern fibheapkey_t fibheap_replace_key (fibheap_t, fibnode_t, | |
| 80 fibheapkey_t); | |
| 81 extern void *fibheap_replace_key_data (fibheap_t, fibnode_t, | |
| 82 fibheapkey_t, void *); | |
| 83 extern void *fibheap_extract_min (fibheap_t); | |
| 84 extern void *fibheap_min (fibheap_t); | |
| 85 extern void *fibheap_replace_data (fibheap_t, fibnode_t, void *); | |
| 86 extern void *fibheap_delete_node (fibheap_t, fibnode_t); | |
| 87 extern void fibheap_delete (fibheap_t); | |
| 88 extern fibheap_t fibheap_union (fibheap_t, fibheap_t); | |
| 89 | |
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77e2b8dfacca
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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90 #ifdef __cplusplus |
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77e2b8dfacca
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91 } |
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parents:
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92 #endif |
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parents:
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93 |
| 0 | 94 #endif /* _FIBHEAP_H_ */ |