| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| #include <boost/utility/binary.hpp> |
| #include <gtest/gtest.h> |
| #include "kudu/util/bit-util.h" |
| |
| namespace kudu { |
| |
| TEST(BitUtil, TrailingBits) { |
| EXPECT_EQ(BitUtil::TrailingBits(BOOST_BINARY(1 1 1 1 1 1 1 1), 0), 0); |
| EXPECT_EQ(BitUtil::TrailingBits(BOOST_BINARY(1 1 1 1 1 1 1 1), 1), 1); |
| EXPECT_EQ(BitUtil::TrailingBits(BOOST_BINARY(1 1 1 1 1 1 1 1), 64), |
| BOOST_BINARY(1 1 1 1 1 1 1 1)); |
| EXPECT_EQ(BitUtil::TrailingBits(BOOST_BINARY(1 1 1 1 1 1 1 1), 100), |
| BOOST_BINARY(1 1 1 1 1 1 1 1)); |
| EXPECT_EQ(BitUtil::TrailingBits(0, 1), 0); |
| EXPECT_EQ(BitUtil::TrailingBits(0, 64), 0); |
| EXPECT_EQ(BitUtil::TrailingBits(1LL << 63, 0), 0); |
| EXPECT_EQ(BitUtil::TrailingBits(1LL << 63, 63), 0); |
| EXPECT_EQ(BitUtil::TrailingBits(1LL << 63, 64), 1LL << 63); |
| |
| } |
| |
| TEST(BitUtil, ShiftBits) { |
| EXPECT_EQ(BitUtil::ShiftLeftZeroOnOverflow(1ULL, 64), 0ULL); |
| EXPECT_EQ(BitUtil::ShiftLeftZeroOnOverflow(0xFFFFFFFFFFFFFFFFULL, 32), 0xFFFFFFFF00000000ULL); |
| EXPECT_EQ(BitUtil::ShiftRightZeroOnOverflow(1ULL, 64), 0ULL); |
| EXPECT_EQ(BitUtil::ShiftRightZeroOnOverflow(0xFFFFFFFFFFFFFFFFULL, 32), 0x00000000FFFFFFFFULL); |
| } |
| |
| } // namespace kudu |