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71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
/*
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* Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "utilities/intn_t.hpp"
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#include "unittest.hpp"
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// Sanity tests for off-by-one errors
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static_assert(intn_t<1>::min == -1 && intn_t<1>::max == 0, "");
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static_assert(intn_t<2>::min == -2 && intn_t<2>::max == 1, "");
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static_assert(intn_t<3>::min == -4 && intn_t<3>::max == 3, "");
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static_assert(uintn_t<1>::max == 1, "");
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static_assert(uintn_t<2>::max == 3, "");
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static_assert(uintn_t<3>::max == 7, "");
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template <unsigned int nbits>
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static void test_intn_t() {
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static_assert(std::numeric_limits<intn_t<nbits>>::min() <= intn_t<nbits>(-1) &&
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intn_t<nbits>(-1) < intn_t<nbits>(0) &&
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intn_t<nbits>(0) <= std::numeric_limits<intn_t<nbits>>::max(), "basic sanity");
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constexpr int period = intn_t<nbits>::max - intn_t<nbits>::min + 1;
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for (int i = std::numeric_limits<signed char>::min(); i < std::numeric_limits<signed char>::max(); i++) {
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ASSERT_EQ(intn_t<nbits>(i), intn_t<nbits>(i + period));
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ASSERT_EQ(int(intn_t<nbits>(i)), int(intn_t<nbits>(i + period)));
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}
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for (int i = intn_t<nbits>::min; i <= intn_t<nbits>::max; i++) {
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ASSERT_EQ(i, int(intn_t<nbits>(i)));
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if (i > intn_t<nbits>::min) {
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ASSERT_TRUE(intn_t<nbits>(i - 1) < intn_t<nbits>(i));
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} else {
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ASSERT_TRUE(intn_t<nbits>(i - 1) > intn_t<nbits>(i));
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}
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if (i < intn_t<nbits>::max) {
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ASSERT_TRUE(intn_t<nbits>(i) < intn_t<nbits>(i + 1));
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} else {
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ASSERT_TRUE(intn_t<nbits>(i) > intn_t<nbits>(i + 1));
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}
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}
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}
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TEST(utilities, intn_t) {
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test_intn_t<1>();
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test_intn_t<2>();
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test_intn_t<3>();
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test_intn_t<4>();
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test_intn_t<5>();
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test_intn_t<6>();
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test_intn_t<7>();
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test_intn_t<8>();
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}
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