119 lines
5.6 KiB
C++
119 lines
5.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#include <sal/config.h>
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#include <limits>
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#include <cppunit/TestAssert.h>
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#include <cppunit/TestFixture.h>
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#include <cppunit/extensions/HelperMacros.h>
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#include <o3tl/safeint.hxx>
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namespace {
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class Test: public CppUnit::TestFixture {
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private:
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CPPUNIT_TEST_SUITE(Test);
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CPPUNIT_TEST(testSignedSaturatingAdd);
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CPPUNIT_TEST(testUnsignedSaturatingAdd);
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CPPUNIT_TEST_SUITE_END();
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void testSignedSaturatingAdd() {
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auto const min = std::numeric_limits<int>::min();
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auto const max = std::numeric_limits<int>::max();
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CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(min, min));
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CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(min, min + 1));
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CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(min, -1));
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CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(min, 0));
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CPPUNIT_ASSERT_EQUAL(min + 1, o3tl::saturating_add(min, 1));
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CPPUNIT_ASSERT_EQUAL(min + max - 1, o3tl::saturating_add(min, max - 1));
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CPPUNIT_ASSERT_EQUAL(min + max, o3tl::saturating_add(min, max));
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CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(min + 1, min));
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CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(min + 1, min + 1));
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CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(min + 1, -1));
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CPPUNIT_ASSERT_EQUAL(min + 1, o3tl::saturating_add(min + 1, 0));
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CPPUNIT_ASSERT_EQUAL(min + 2, o3tl::saturating_add(min + 1, 1));
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CPPUNIT_ASSERT_EQUAL(min + max, o3tl::saturating_add(min + 1, max - 1));
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CPPUNIT_ASSERT_EQUAL(min + max + 1, o3tl::saturating_add(min + 1, max));
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CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(-1, min));
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CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(-1, min + 1));
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CPPUNIT_ASSERT_EQUAL(-2, o3tl::saturating_add(-1, -1));
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CPPUNIT_ASSERT_EQUAL(-1, o3tl::saturating_add(-1, 0));
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CPPUNIT_ASSERT_EQUAL(0, o3tl::saturating_add(-1, 1));
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CPPUNIT_ASSERT_EQUAL(max - 2, o3tl::saturating_add(-1, max - 1));
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CPPUNIT_ASSERT_EQUAL(max - 1, o3tl::saturating_add(-1, max));
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CPPUNIT_ASSERT_EQUAL(min, o3tl::saturating_add(0, min));
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CPPUNIT_ASSERT_EQUAL(min + 1, o3tl::saturating_add(0, min + 1));
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CPPUNIT_ASSERT_EQUAL(-1, o3tl::saturating_add(0, -1));
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CPPUNIT_ASSERT_EQUAL(0, o3tl::saturating_add(0, 0));
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CPPUNIT_ASSERT_EQUAL(1, o3tl::saturating_add(0, 1));
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CPPUNIT_ASSERT_EQUAL(max - 1, o3tl::saturating_add(0, max - 1));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(0, max));
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CPPUNIT_ASSERT_EQUAL(min + 1, o3tl::saturating_add(1, min));
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CPPUNIT_ASSERT_EQUAL(min + 2, o3tl::saturating_add(1, min + 1));
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CPPUNIT_ASSERT_EQUAL(0, o3tl::saturating_add(1, -1));
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CPPUNIT_ASSERT_EQUAL(1, o3tl::saturating_add(1, 0));
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CPPUNIT_ASSERT_EQUAL(2, o3tl::saturating_add(1, 1));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(1, max - 1));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(1, max));
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CPPUNIT_ASSERT_EQUAL(min + max - 1, o3tl::saturating_add(max - 1, min));
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CPPUNIT_ASSERT_EQUAL(min + max, o3tl::saturating_add(max - 1, min + 1));
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CPPUNIT_ASSERT_EQUAL(max - 2, o3tl::saturating_add(max - 1, -1));
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CPPUNIT_ASSERT_EQUAL(max - 1, o3tl::saturating_add(max - 1, 0));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max - 1, 1));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max - 1, max - 1));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max - 1, max));
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CPPUNIT_ASSERT_EQUAL(min + max, o3tl::saturating_add(max, min));
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CPPUNIT_ASSERT_EQUAL(min + max + 1, o3tl::saturating_add(max, min + 1));
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CPPUNIT_ASSERT_EQUAL(max - 1, o3tl::saturating_add(max, -1));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, 0));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, 1));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, max - 1));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, max));
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}
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void testUnsignedSaturatingAdd() {
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auto const max = std::numeric_limits<unsigned int>::max();
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CPPUNIT_ASSERT_EQUAL(0U, o3tl::saturating_add(0U, 0U));
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CPPUNIT_ASSERT_EQUAL(1U, o3tl::saturating_add(0U, 1U));
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CPPUNIT_ASSERT_EQUAL(max - 1, o3tl::saturating_add(0U, max - 1));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(0U, max));
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CPPUNIT_ASSERT_EQUAL(1U, o3tl::saturating_add(1U, 0U));
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CPPUNIT_ASSERT_EQUAL(2U, o3tl::saturating_add(1U, 1U));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(1U, max - 1));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(1U, max));
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CPPUNIT_ASSERT_EQUAL(max - 1, o3tl::saturating_add(max - 1, 0U));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max - 1, 1U));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max - 1, max - 1));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max - 1, max));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, 0U));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, 1U));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, max - 1));
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CPPUNIT_ASSERT_EQUAL(max, o3tl::saturating_add(max, max));
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}
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};
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CPPUNIT_TEST_SUITE_REGISTRATION(Test);
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
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