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114 lines
3.7 KiB
C++
114 lines
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/Assertions.h"
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#include "mozilla/BinarySearch.h"
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#include "mozilla/Vector.h"
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using mozilla::ArrayLength;
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using mozilla::BinarySearch;
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using mozilla::BinarySearchIf;
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using mozilla::Vector;
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#define A(a) MOZ_RELEASE_ASSERT(a)
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struct Person
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{
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int mAge;
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int mId;
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Person(int aAge, int aId) : mAge(aAge), mId(aId) {}
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};
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struct GetAge
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{
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Vector<Person>& mV;
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explicit GetAge(Vector<Person>& aV) : mV(aV) {}
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int operator[](size_t index) const { return mV[index].mAge; }
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};
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struct RangeFinder {
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const int mLower, mUpper;
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RangeFinder(int lower, int upper) : mLower(lower), mUpper(upper) {}
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int operator()(int val) const {
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if (val >= mUpper) return -1;
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if (val < mLower) return 1;
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return 0;
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}
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};
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static void
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TestBinarySearch()
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{
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size_t m;
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Vector<int> v1;
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v1.append(2);
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v1.append(4);
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v1.append(6);
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v1.append(8);
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MOZ_RELEASE_ASSERT(!BinarySearch(v1, 0, v1.length(), 1, &m) && m == 0);
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MOZ_RELEASE_ASSERT( BinarySearch(v1, 0, v1.length(), 2, &m) && m == 0);
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MOZ_RELEASE_ASSERT(!BinarySearch(v1, 0, v1.length(), 3, &m) && m == 1);
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MOZ_RELEASE_ASSERT( BinarySearch(v1, 0, v1.length(), 4, &m) && m == 1);
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MOZ_RELEASE_ASSERT(!BinarySearch(v1, 0, v1.length(), 5, &m) && m == 2);
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MOZ_RELEASE_ASSERT( BinarySearch(v1, 0, v1.length(), 6, &m) && m == 2);
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MOZ_RELEASE_ASSERT(!BinarySearch(v1, 0, v1.length(), 7, &m) && m == 3);
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MOZ_RELEASE_ASSERT( BinarySearch(v1, 0, v1.length(), 8, &m) && m == 3);
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MOZ_RELEASE_ASSERT(!BinarySearch(v1, 0, v1.length(), 9, &m) && m == 4);
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MOZ_RELEASE_ASSERT(!BinarySearch(v1, 1, 3, 1, &m) && m == 1);
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MOZ_RELEASE_ASSERT(!BinarySearch(v1, 1, 3, 2, &m) && m == 1);
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MOZ_RELEASE_ASSERT(!BinarySearch(v1, 1, 3, 3, &m) && m == 1);
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MOZ_RELEASE_ASSERT( BinarySearch(v1, 1, 3, 4, &m) && m == 1);
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MOZ_RELEASE_ASSERT(!BinarySearch(v1, 1, 3, 5, &m) && m == 2);
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MOZ_RELEASE_ASSERT( BinarySearch(v1, 1, 3, 6, &m) && m == 2);
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MOZ_RELEASE_ASSERT(!BinarySearch(v1, 1, 3, 7, &m) && m == 3);
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MOZ_RELEASE_ASSERT(!BinarySearch(v1, 1, 3, 8, &m) && m == 3);
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MOZ_RELEASE_ASSERT(!BinarySearch(v1, 1, 3, 9, &m) && m == 3);
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MOZ_RELEASE_ASSERT(!BinarySearch(v1, 0, 0, 0, &m) && m == 0);
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MOZ_RELEASE_ASSERT(!BinarySearch(v1, 0, 0, 9, &m) && m == 0);
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Vector<int> v2;
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MOZ_RELEASE_ASSERT(!BinarySearch(v2, 0, 0, 0, &m) && m == 0);
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MOZ_RELEASE_ASSERT(!BinarySearch(v2, 0, 0, 9, &m) && m == 0);
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Vector<Person> v3;
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v3.append(Person(2, 42));
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v3.append(Person(4, 13));
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v3.append(Person(6, 360));
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A(!BinarySearch(GetAge(v3), 0, v3.length(), 1, &m) && m == 0);
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A( BinarySearch(GetAge(v3), 0, v3.length(), 2, &m) && m == 0);
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A(!BinarySearch(GetAge(v3), 0, v3.length(), 3, &m) && m == 1);
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A( BinarySearch(GetAge(v3), 0, v3.length(), 4, &m) && m == 1);
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A(!BinarySearch(GetAge(v3), 0, v3.length(), 5, &m) && m == 2);
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A( BinarySearch(GetAge(v3), 0, v3.length(), 6, &m) && m == 2);
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A(!BinarySearch(GetAge(v3), 0, v3.length(), 7, &m) && m == 3);
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}
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static void
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TestBinarySearchIf()
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{
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const int v1[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
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const size_t len = ArrayLength(v1);
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size_t m;
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A( BinarySearchIf(v1, 0, len, RangeFinder( 2, 3), &m) && m == 2);
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A(!BinarySearchIf(v1, 0, len, RangeFinder(-5, -2), &m) && m == 0);
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A( BinarySearchIf(v1, 0, len, RangeFinder( 3, 5), &m) && m >= 3 && m < 5);
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A(!BinarySearchIf(v1, 0, len, RangeFinder(10, 12), &m) && m == 10);
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}
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int
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main()
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{
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TestBinarySearch();
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TestBinarySearchIf();
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return 0;
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}
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