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-rw-r--r--absl/container/internal/hash_generator_testing.cc72
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diff --git a/absl/container/internal/hash_generator_testing.cc b/absl/container/internal/hash_generator_testing.cc
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+// Copyright 2018 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
+//
+// 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 "absl/container/internal/hash_generator_testing.h"
+
+#include <deque>
+
+namespace absl {
+namespace container_internal {
+namespace hash_internal {
+namespace {
+
+class RandomDeviceSeedSeq {
+ public:
+ using result_type = typename std::random_device::result_type;
+
+ template <class Iterator>
+ void generate(Iterator start, Iterator end) {
+ while (start != end) {
+ *start = gen_();
+ ++start;
+ }
+ }
+
+ private:
+ std::random_device gen_;
+};
+
+} // namespace
+
+std::mt19937_64* GetThreadLocalRng() {
+ RandomDeviceSeedSeq seed_seq;
+ thread_local auto* rng = new std::mt19937_64(seed_seq);
+ return rng;
+}
+
+std::string Generator<std::string>::operator()() const {
+ // NOLINTNEXTLINE(runtime/int)
+ std::uniform_int_distribution<short> chars(0x20, 0x7E);
+ std::string res;
+ res.resize(32);
+ std::generate(res.begin(), res.end(),
+ [&]() { return chars(*GetThreadLocalRng()); });
+ return res;
+}
+
+absl::string_view Generator<absl::string_view>::operator()() const {
+ static auto* arena = new std::deque<std::string>();
+ // NOLINTNEXTLINE(runtime/int)
+ std::uniform_int_distribution<short> chars(0x20, 0x7E);
+ arena->emplace_back();
+ auto& res = arena->back();
+ res.resize(32);
+ std::generate(res.begin(), res.end(),
+ [&]() { return chars(*GetThreadLocalRng()); });
+ return res;
+}
+
+} // namespace hash_internal
+} // namespace container_internal
+} // namespace absl