Abseil Common Libraries (C++) (grcp 依赖)
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72 lines
2.0 KiB
72 lines
2.0 KiB
// Copyright 2018 The Abseil Authors. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// https://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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#include "absl/container/internal/hash_generator_testing.h" |
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#include <deque> |
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namespace absl { |
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namespace container_internal { |
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namespace hash_internal { |
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namespace { |
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class RandomDeviceSeedSeq { |
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public: |
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using result_type = typename std::random_device::result_type; |
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template <class Iterator> |
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void generate(Iterator start, Iterator end) { |
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while (start != end) { |
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*start = gen_(); |
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++start; |
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} |
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} |
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private: |
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std::random_device gen_; |
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}; |
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} // namespace |
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std::mt19937_64* GetSharedRng() { |
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RandomDeviceSeedSeq seed_seq; |
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static auto* rng = new std::mt19937_64(seed_seq); |
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return rng; |
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} |
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std::string Generator<std::string>::operator()() const { |
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// NOLINTNEXTLINE(runtime/int) |
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std::uniform_int_distribution<short> chars(0x20, 0x7E); |
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std::string res; |
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res.resize(32); |
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std::generate(res.begin(), res.end(), |
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[&]() { return chars(*GetSharedRng()); }); |
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return res; |
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} |
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absl::string_view Generator<absl::string_view>::operator()() const { |
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static auto* arena = new std::deque<std::string>(); |
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// NOLINTNEXTLINE(runtime/int) |
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std::uniform_int_distribution<short> chars(0x20, 0x7E); |
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arena->emplace_back(); |
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auto& res = arena->back(); |
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res.resize(32); |
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std::generate(res.begin(), res.end(), |
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[&]() { return chars(*GetSharedRng()); }); |
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return res; |
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} |
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} // namespace hash_internal |
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} // namespace container_internal |
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} // namespace absl
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