| // Copyright 2019 Google LLC |
| // |
| // Licensed 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 |
| // |
| // https://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 "public/emboss_defines.h" |
| |
| #include <cstdint> |
| |
| #include "gtest/gtest.h" |
| |
| namespace emboss { |
| namespace support { |
| namespace test { |
| |
| TEST(CheckPointerAlignment, Aligned) { |
| ::std::uint32_t t; |
| EMBOSS_DCHECK_POINTER_ALIGNMENT(&t, sizeof t, 0); |
| EMBOSS_DCHECK_POINTER_ALIGNMENT(&t, 1, 0); |
| EMBOSS_DCHECK_POINTER_ALIGNMENT(reinterpret_cast<char *>(&t) + 1, sizeof t, |
| 1); |
| EMBOSS_DCHECK_POINTER_ALIGNMENT(reinterpret_cast<char *>(&t) + 1, 1, 0); |
| } |
| |
| TEST(CheckPointerAlignment, Misaligned) { |
| ::std::uint32_t t; |
| EXPECT_DEATH(EMBOSS_DCHECK_POINTER_ALIGNMENT(&t, sizeof t, 1), ""); |
| EXPECT_DEATH(EMBOSS_DCHECK_POINTER_ALIGNMENT(reinterpret_cast<char *>(&t) + 1, |
| sizeof t, 0), |
| ""); |
| } |
| |
| #if EMBOSS_SYSTEM_IS_TWOS_COMPLEMENT |
| TEST(SystemIsTwosComplement, CastToSigned) { |
| EXPECT_EQ(-static_cast</**/ ::std::int64_t>(0x80000000), |
| static_cast</**/ ::std::int32_t>(0x80000000)); |
| } |
| #endif // EMBOSS_SYSTEM_IS_TWOS_COMPLEMENT |
| |
| // Note: I (bolms@) can't think of a way to truly test |
| // EMBOSS_ALIAS_SAFE_POINTER_CAST, since the compiler might let it work even if |
| // it's not "supposed" to. (E.g., even with -fstrict-aliasing, GCC doesn't |
| // always take advantage of strict aliasing to do any optimizations.) |
| |
| // The native <=> fixed endian macros are tested in emboss_bit_util_test.cc, |
| // since their expansions rely on emboss_bit_util.h. |
| |
| } // namespace test |
| } // namespace support |
| } // namespace emboss |