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GCC Code Coverage Report

Directory:	.		Exec	Total	Coverage
File:	src/prop/minisat/mtl/Heap.h	Lines:	69	77	89.6 %
Date:	2021-09-29	Branches:	35	124	28.2 %


/******************************************************************************************[Heap.h]
Copyright (c) 2003-2006, Niklas Een, Niklas Sorensson
Copyright (c) 2007-2010, Niklas Sorensson

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
**************************************************************************************************/

#ifndef Minisat_Heap_h
#define Minisat_Heap_h

#include "base/check.h"
#include "prop/minisat/mtl/Vec.h"

namespace cvc5 {
namespace Minisat {

//=================================================================================================
// A heap implementation with support for decrease/increase key.


template<class Comp>
class Heap {
    Comp     lt;       // The heap is a minimum-heap with respect to this comparator
    vec<int> heap;     // Heap of integers
    vec<int> indices;  // Each integers position (index) in the Heap

    // Index "traversal" functions
    static inline int left  (int i) { return i*2+1; }
    static inline int right (int i) { return (i+1)*2; }
    static inline int parent(int i) { return (i-1) >> 1; }


    void percolateUp(int i)
    {
        int x  = heap[i];
        int p  = parent(i);

        while (i != 0 && lt(x, heap[p])){
            heap[i]          = heap[p];
            indices[heap[p]] = i;
            i                = p;
            p                = parent(p);
        }
        heap   [i] = x;
        indices[x] = i;
    }


    void percolateDown(int i)
    {
        int x = heap[i];
        while (left(i) < heap.size()){
            int child = right(i) < heap.size() && lt(heap[right(i)], heap[left(i)]) ? right(i) : left(i);
            if (!lt(heap[child], x)) break;
            heap[i]          = heap[child];
            indices[heap[i]] = i;
            i                = child;
        }
        heap   [i] = x;
        indices[x] = i;
    }


  public:
    Heap(const Comp& c) : lt(c) { }

    int  size      ()          const { return heap.size(); }
    bool empty     ()          const { return heap.size() == 0; }
    bool inHeap    (int n)     const { return n < indices.size() && indices[n] >= 0; }
    int operator[](int index) const
    {
      Assert(index < heap.size());
      return heap[index];
    }

    void decrease(int n)
    {
      Assert(inHeap(n));
      percolateUp(indices[n]);
    }
    void increase(int n)
    {
      Assert(inHeap(n));
      percolateDown(indices[n]);
    }

    // Safe variant of insert/decrease/increase:
    void update(int n)
    {
        if (!inHeap(n))
            insert(n);
        else {
            percolateUp(indices[n]);
            percolateDown(indices[n]); }
    }


    void insert(int n)
    {
        indices.growTo(n+1, -1);
        Assert(!inHeap(n));

        indices[n] = heap.size();
        heap.push(n);
        percolateUp(indices[n]);
    }


    int  removeMin()
    {
        int x            = heap[0];
        heap[0]          = heap.last();
        indices[heap[0]] = 0;
        indices[x]       = -1;
        heap.pop();
        if (heap.size() > 1) percolateDown(0);
        return x;
    }


    // Rebuild the heap from scratch, using the elements in 'ns':
    void build(vec<int>& ns) {
        for (int i = 0; i < heap.size(); i++)
            indices[heap[i]] = -1;
        heap.clear();

        for (int i = 0; i < ns.size(); i++){
            indices[ns[i]] = i;
            heap.push(ns[i]); }

        for (int i = heap.size() / 2 - 1; i >= 0; i--)
            percolateDown(i);
    }

    void clear(bool dealloc = false)
    {
        for (int i = 0; i < heap.size(); i++)
            indices[heap[i]] = -1;
        heap.clear(dealloc);
    }
};


//=================================================================================================
}
}  // namespace cvc5

#endif


Generated by: GCOVR (Version 3.2)

Line	Exec	Source
1		/******************************************************************************************[Heap.h]
2		Copyright (c) 2003-2006, Niklas Een, Niklas Sorensson
3		Copyright (c) 2007-2010, Niklas Sorensson
4
5		Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
6		associated documentation files (the "Software"), to deal in the Software without restriction,
7		including without limitation the rights to use, copy, modify, merge, publish, distribute,
8		sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
9		furnished to do so, subject to the following conditions:
10
11		The above copyright notice and this permission notice shall be included in all copies or
12		substantial portions of the Software.
13
14		THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
15		NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
16		NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
17		DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
18		OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
19		**************************************************************************************************/
20
21		#ifndef Minisat_Heap_h
22		#define Minisat_Heap_h
23
24		#include "base/check.h"
25		#include "prop/minisat/mtl/Vec.h"
26
27		namespace cvc5 {
28		namespace Minisat {
29
30		//=================================================================================================
31		// A heap implementation with support for decrease/increase key.
32
33
34		template<class Comp>
35	12650	class Heap {
36		Comp lt; // The heap is a minimum-heap with respect to this comparator
37		vec<int> heap; // Heap of integers
38		vec<int> indices; // Each integers position (index) in the Heap
39
40		// Index "traversal" functions
41	43656433	static inline int left (int i) { return i*2+1; }
42	39356864	static inline int right (int i) { return (i+1)*2; }
43	27480225	static inline int parent(int i) { return (i-1) >> 1; }
44
45
46	11588683	void percolateUp(int i)
47		{
48	11588683	int x = heap[i];
49	11588683	int p = parent(i);
50
51	43371767	while (i != 0 && lt(x, heap[p])){
52	15891542	heap[i] = heap[p];
53	15891542	indices[heap[p]] = i;
54	15891542	i = p;
55	15891542	p = parent(p);
56		}
57	11588683	heap [i] = x;
58	11588683	indices[x] = i;
59	11588683	}
60
61
62	5779441	void percolateDown(int i)
63		{
64	5779441	int x = heap[i];
65	31146541	while (left(i) < heap.size()){
66	16232184	int child = right(i) < heap.size() && lt(heap[right(i)], heap[left(i)]) ? right(i) : left(i);
67	16232184	if (!lt(heap[child], x)) break;
68	12683550	heap[i] = heap[child];
69	12683550	indices[heap[i]] = i;
70	12683550	i = child;
71		}
72	5779441	heap [i] = x;
73	5779441	indices[x] = i;
74	5779441	}
75
76
77		public:
78	12656	Heap(const Comp& c) : lt(c) { }
79
80	919	int size () const { return heap.size(); }
81	3162043	bool empty () const { return heap.size() == 0; }
82	62494450	bool inHeap (int n) const { return n < indices.size() && indices[n] >= 0; }
83		int operator[](int index) const
84		{
85		Assert(index < heap.size());
86		return heap[index];
87		}
88
89	7330172	void decrease(int n)
90		{
91	7330172	Assert(inHeap(n));
92	7330172	percolateUp(indices[n]);
93	7330172	}
94	1572217	void increase(int n)
95		{
96	1572217	Assert(inHeap(n));
97	1572217	percolateDown(indices[n]);
98	1572217	}
99
100		// Safe variant of insert/decrease/increase:
101	690822	void update(int n)
102		{
103	690822	if (!inHeap(n))
104	13073	insert(n);
105		else {
106	677749	percolateUp(indices[n]);
107	677749	percolateDown(indices[n]); }
108	690822	}
109
110
111	3580762	void insert(int n)
112		{
113	3580762	indices.growTo(n+1, -1);
114	3580762	Assert(!inHeap(n));
115
116	3580762	indices[n] = heap.size();
117	3580762	heap.push(n);
118	3580762	percolateUp(indices[n]);
119	3580762	}
120
121
122	3109954	int removeMin()
123		{
124	3109954	int x = heap[0];
125	3109954	heap[0] = heap.last();
126	3109954	indices[heap[0]] = 0;
127	3109954	indices[x] = -1;
128	3109954	heap.pop();
129	3109954	if (heap.size() > 1) percolateDown(0);
130	3109954	return x;
131		}
132
133
134		// Rebuild the heap from scratch, using the elements in 'ns':
135	12060	void build(vec<int>& ns) {
136	1049037	for (int i = 0; i < heap.size(); i++)
137	1036977	indices[heap[i]] = -1;
138	12060	heap.clear();
139
140	906640	for (int i = 0; i < ns.size(); i++){
141	894580	indices[ns[i]] = i;
142	894580	heap.push(ns[i]); }
143
144	457399	for (int i = heap.size() / 2 - 1; i >= 0; i--)
145	445339	percolateDown(i);
146	12060	}
147
148		void clear(bool dealloc = false)
149		{
150		for (int i = 0; i < heap.size(); i++)
151		indices[heap[i]] = -1;
152		heap.clear(dealloc);
153		}
154		};
155
156
157		//=================================================================================================
158		}
159		} // namespace cvc5
160
161		#endif