| // Copyright 2017 The Abseil Authors. |
| // |
| // 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 "absl/random/internal/randen_slow.h" |
| |
| #include <cstring> |
| |
| #include "gtest/gtest.h" |
| #include "absl/random/internal/randen_traits.h" |
| |
| namespace { |
| |
| using absl::random_internal::RandenSlow; |
| using absl::random_internal::RandenTraits; |
| |
| // Local state parameters. |
| constexpr size_t kSeedBytes = |
| RandenTraits::kStateBytes - RandenTraits::kCapacityBytes; |
| constexpr size_t kStateSizeT = RandenTraits::kStateBytes / sizeof(uint64_t); |
| constexpr size_t kSeedSizeT = kSeedBytes / sizeof(uint32_t); |
| |
| struct alignas(16) randen { |
| uint64_t state[kStateSizeT]; |
| uint32_t seed[kSeedSizeT]; |
| }; |
| |
| TEST(RandenSlowTest, Default) { |
| constexpr uint64_t kGolden[] = { |
| 0x6c6534090ee6d3ee, 0x044e2b9b9d5333c6, 0xc3c14f134e433977, |
| 0xdda9f47cd90410ee, 0x887bf3087fd8ca10, 0xf0b780f545c72912, |
| 0x15dbb1d37696599f, 0x30ec63baff3c6d59, 0xb29f73606f7f20a6, |
| 0x02808a316f49a54c, 0x3b8feaf9d5c8e50e, 0x9cbf605e3fd9de8a, |
| 0xc970ae1a78183bbb, 0xd8b2ffd356301ed5, 0xf4b327fe0fc73c37, |
| 0xcdfd8d76eb8f9a19, 0xc3a506eb91420c9d, 0xd5af05dd3eff9556, |
| 0x48db1bb78f83c4a1, 0x7023920e0d6bfe8c, 0x58d3575834956d42, |
| 0xed1ef4c26b87b840, 0x8eef32a23e0b2df3, 0x497cabf3431154fc, |
| 0x4e24370570029a8b, 0xd88b5749f090e5ea, 0xc651a582a970692f, |
| 0x78fcec2cbb6342f5, 0x463cb745612f55db, 0x352ee4ad1816afe3, |
| 0x026ff374c101da7e, 0x811ef0821c3de851, |
| }; |
| |
| alignas(16) randen d; |
| std::memset(d.state, 0, sizeof(d.state)); |
| RandenSlow::Generate(RandenSlow::GetKeys(), d.state); |
| |
| uint64_t* id = d.state; |
| for (const auto& elem : kGolden) { |
| EXPECT_EQ(elem, *id++); |
| } |
| } |
| |
| } // namespace |