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This enables efficient implementations of priority queues, and will also be used in LibCompress for efficient huffman tree generation.
89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
/*
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* Copyright (c) 2021, Idan Horowitz <idan.horowitz@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/TestSuite.h>
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#include <AK/BinaryHeap.h>
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#include <AK/String.h>
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TEST_CASE(construct)
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{
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BinaryHeap<int, int, 5> empty;
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EXPECT(empty.is_empty());
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EXPECT(empty.size() == 0);
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}
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TEST_CASE(construct_from_existing)
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{
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int keys[] = { 3, 2, 1 };
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char values[] = { 'c', 'b', 'a' };
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BinaryHeap<int, char, 5> from_existing(keys, values, 3);
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EXPECT(from_existing.size() == 3);
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EXPECT_EQ(from_existing.pop_min(), 'a');
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EXPECT_EQ(from_existing.pop_min(), 'b');
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EXPECT_EQ(from_existing.pop_min(), 'c');
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}
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TEST_CASE(populate_int)
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{
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BinaryHeap<int, int, 5> ints;
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ints.insert(1, 10);
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ints.insert(3, 20);
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ints.insert(2, 30);
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EXPECT_EQ(ints.size(), 3u);
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EXPECT_EQ(ints.pop_min(), 10);
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EXPECT_EQ(ints.size(), 2u);
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EXPECT_EQ(ints.pop_min(), 30);
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EXPECT_EQ(ints.size(), 1u);
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EXPECT_EQ(ints.pop_min(), 20);
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EXPECT_EQ(ints.size(), 0u);
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}
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TEST_CASE(populate_string)
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{
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BinaryHeap<int, String, 5> strings;
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strings.insert(1, "ABC");
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strings.insert(2, "DEF");
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EXPECT_EQ(strings.size(), 2u);
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EXPECT_EQ(strings.pop_min(), "ABC");
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EXPECT_EQ(strings.pop_min(), "DEF");
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EXPECT(strings.is_empty());
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}
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TEST_CASE(large_populate_reverse)
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{
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BinaryHeap<int, int, 1024> ints;
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for (int i = 1023; i >= 0; i--) {
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ints.insert(i, i);
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}
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EXPECT_EQ(ints.size(), 1024u);
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for (int i = 0; i < 1024; i++) {
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EXPECT_EQ(ints.peek_min(), i);
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EXPECT_EQ(ints.pop_min(), i);
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}
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}
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TEST_MAIN(BinaryHeap)
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