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