1 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2009
2 // Free Software Foundation, Inc.
4 // This file is part of the GNU ISO C++ Library. This library is free
5 // software; you can redistribute it and/or modify it under the
6 // terms of the GNU General Public License as published by the
7 // Free Software Foundation; either version 3, or (at your option)
10 // This library is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU General Public License for more details.
15 // You should have received a copy of the GNU General Public License along
16 // with this library; see the file COPYING3. If not see
17 // <http://www.gnu.org/licenses/>.
19 // 25.3.6 Heap operations [lib.alg.heap.operations]
22 #include <testsuite_hooks.h>
24 const int A[] = {1, 11, 12, 3, 10, 6, 17, 4, 8, 2, 5, 13, 9, 15, 14, 16, 7};
25 const int B[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17};
26 const int C[] = {17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1};
27 const int N = sizeof(A) / sizeof(int);
29 // This functor has the equivalent functionality of std::greater<>,
30 // but there is no dependency on <functional> and it also tracks the
31 // number of invocations since creation.
35 static int count() { return _M_count; }
36 static void reset() { _M_count = 0; }
39 operator()(const int& x, const int& y)
51 // Exercise all of the heap functions for operator<. The intermediate
52 // results between push_heap and pop_heap and make_heap and sort_heap
53 // are not checked (they could be).
57 bool test __attribute__((unused)) = true;
59 // sort array s1 using push_heap/pop_heap
61 std::copy(A, A + N, s1);
62 VERIFY(std::equal(s1, s1 + N, A));
64 for (int i = 2; i <= N; ++i)
65 std::push_heap(s1, s1 + i);
67 for (int i = N; i >= 2; --i)
68 std::pop_heap(s1, s1 + i);
70 VERIFY(std::equal(s1, s1 + N, B));
72 // sort array s2 using make_heap/sort_heap
74 std::copy(A, A + N, s2);
75 VERIFY(std::equal(s2, s2 + N, A));
77 std::make_heap(s2, s2 + N);
78 std::sort_heap(s2, s2 + N);
79 VERIFY(std::equal(s2, s2 + N, B));
82 // Perform same tests as above but with the comparison predicate
83 // versions, and add complexity constraint checks.
87 bool test __attribute__((unused)) = true;
91 #ifndef _GLIBCXX_DEBUG
92 //const int logN = static_cast<int>(std::log(static_cast<double>(N)) + 0.5);
97 std::copy(A, A + N, s1);
98 VERIFY(std::equal(s1, s1 + N, A));
100 for (int i = 2; i <= N; ++i)
102 std::push_heap(s1, s1 + i, gt);
103 #ifndef _GLIBCXX_DEBUG
104 VERIFY(gt.count() <= logN);
109 for (int i = N; i >= 2; --i)
111 std::pop_heap(s1, s1 + i, gt);
112 #ifndef _GLIBCXX_DEBUG
113 VERIFY(gt.count() <= 2 * logN);
118 VERIFY(std::equal(s1, s1 + N, C));
120 // sort array s2 using make_heap/sort_heap
122 std::copy(A, A + N, s2);
123 VERIFY(std::equal(s2, s2 + N, A));
125 std::make_heap(s2, s2 + N, gt);
126 #ifndef _GLIBCXX_DEBUG
127 VERIFY(gt.count() <= 3 * N);
131 std::sort_heap(s2, s2 + N, gt);
132 #ifndef _GLIBCXX_DEBUG
133 VERIFY(gt.count() <= N * logN);
136 VERIFY(std::equal(s2, s2 + N, C));