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author | anastasy888 <anastasy888@yandex-team.ru> | 2022-02-10 16:45:54 +0300 |
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committer | Daniil Cherednik <dcherednik@yandex-team.ru> | 2022-02-10 16:45:54 +0300 |
commit | 49f765d71da452ea93138a25559dfa68dd76c7f3 (patch) | |
tree | 1016041feb637349e401dcc0fa85217dd2c2c639 /contrib/restricted/abseil-cpp/absl/random/internal/randen.h | |
parent | 7353a3fdea9c67c256980c00a2b3b67f09b23a27 (diff) | |
download | ydb-49f765d71da452ea93138a25559dfa68dd76c7f3.tar.gz |
Restoring authorship annotation for <anastasy888@yandex-team.ru>. Commit 1 of 2.
Diffstat (limited to 'contrib/restricted/abseil-cpp/absl/random/internal/randen.h')
-rw-r--r-- | contrib/restricted/abseil-cpp/absl/random/internal/randen.h | 198 |
1 files changed, 99 insertions, 99 deletions
diff --git a/contrib/restricted/abseil-cpp/absl/random/internal/randen.h b/contrib/restricted/abseil-cpp/absl/random/internal/randen.h index 9a3840b8f1..6c2d53e210 100644 --- a/contrib/restricted/abseil-cpp/absl/random/internal/randen.h +++ b/contrib/restricted/abseil-cpp/absl/random/internal/randen.h @@ -1,102 +1,102 @@ -// 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. - -#ifndef ABSL_RANDOM_INTERNAL_RANDEN_H_ -#define ABSL_RANDOM_INTERNAL_RANDEN_H_ - -#include <cstddef> - -#include "absl/random/internal/platform.h" -#include "absl/random/internal/randen_hwaes.h" -#include "absl/random/internal/randen_slow.h" -#include "absl/random/internal/randen_traits.h" - -namespace absl { +// 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. + +#ifndef ABSL_RANDOM_INTERNAL_RANDEN_H_ +#define ABSL_RANDOM_INTERNAL_RANDEN_H_ + +#include <cstddef> + +#include "absl/random/internal/platform.h" +#include "absl/random/internal/randen_hwaes.h" +#include "absl/random/internal/randen_slow.h" +#include "absl/random/internal/randen_traits.h" + +namespace absl { ABSL_NAMESPACE_BEGIN -namespace random_internal { - +namespace random_internal { + // RANDen = RANDom generator or beetroots in Swiss High German. -// 'Strong' (well-distributed, unpredictable, backtracking-resistant) random -// generator, faster in some benchmarks than std::mt19937_64 and pcg64_c32. -// -// Randen implements the basic state manipulation methods. -class Randen { - public: - static constexpr size_t kStateBytes = RandenTraits::kStateBytes; - static constexpr size_t kCapacityBytes = RandenTraits::kCapacityBytes; - static constexpr size_t kSeedBytes = RandenTraits::kSeedBytes; - - ~Randen() = default; - - Randen(); - - // Generate updates the randen sponge. The outer portion of the sponge - // (kCapacityBytes .. kStateBytes) may be consumed as PRNG state. - template <typename T, size_t N> - void Generate(T (&state)[N]) const { - static_assert(N * sizeof(T) == kStateBytes, - "Randen::Generate() requires kStateBytes of state"); -#if ABSL_RANDOM_INTERNAL_AES_DISPATCH - // HW AES Dispatch. - if (has_crypto_) { - RandenHwAes::Generate(keys_, state); - } else { - RandenSlow::Generate(keys_, state); - } -#elif ABSL_HAVE_ACCELERATED_AES - // HW AES is enabled. - RandenHwAes::Generate(keys_, state); -#else - // HW AES is disabled. - RandenSlow::Generate(keys_, state); -#endif - } - - // Absorb incorporates additional seed material into the randen sponge. After - // absorb returns, Generate must be called before the state may be consumed. - template <typename S, size_t M, typename T, size_t N> - void Absorb(const S (&seed)[M], T (&state)[N]) const { - static_assert(M * sizeof(S) == RandenTraits::kSeedBytes, - "Randen::Absorb() requires kSeedBytes of seed"); - - static_assert(N * sizeof(T) == RandenTraits::kStateBytes, - "Randen::Absorb() requires kStateBytes of state"); -#if ABSL_RANDOM_INTERNAL_AES_DISPATCH - // HW AES Dispatch. - if (has_crypto_) { - RandenHwAes::Absorb(seed, state); - } else { - RandenSlow::Absorb(seed, state); - } -#elif ABSL_HAVE_ACCELERATED_AES - // HW AES is enabled. - RandenHwAes::Absorb(seed, state); -#else - // HW AES is disabled. - RandenSlow::Absorb(seed, state); -#endif - } - - private: - const void* keys_; -#if ABSL_RANDOM_INTERNAL_AES_DISPATCH - bool has_crypto_; -#endif -}; - -} // namespace random_internal +// 'Strong' (well-distributed, unpredictable, backtracking-resistant) random +// generator, faster in some benchmarks than std::mt19937_64 and pcg64_c32. +// +// Randen implements the basic state manipulation methods. +class Randen { + public: + static constexpr size_t kStateBytes = RandenTraits::kStateBytes; + static constexpr size_t kCapacityBytes = RandenTraits::kCapacityBytes; + static constexpr size_t kSeedBytes = RandenTraits::kSeedBytes; + + ~Randen() = default; + + Randen(); + + // Generate updates the randen sponge. The outer portion of the sponge + // (kCapacityBytes .. kStateBytes) may be consumed as PRNG state. + template <typename T, size_t N> + void Generate(T (&state)[N]) const { + static_assert(N * sizeof(T) == kStateBytes, + "Randen::Generate() requires kStateBytes of state"); +#if ABSL_RANDOM_INTERNAL_AES_DISPATCH + // HW AES Dispatch. + if (has_crypto_) { + RandenHwAes::Generate(keys_, state); + } else { + RandenSlow::Generate(keys_, state); + } +#elif ABSL_HAVE_ACCELERATED_AES + // HW AES is enabled. + RandenHwAes::Generate(keys_, state); +#else + // HW AES is disabled. + RandenSlow::Generate(keys_, state); +#endif + } + + // Absorb incorporates additional seed material into the randen sponge. After + // absorb returns, Generate must be called before the state may be consumed. + template <typename S, size_t M, typename T, size_t N> + void Absorb(const S (&seed)[M], T (&state)[N]) const { + static_assert(M * sizeof(S) == RandenTraits::kSeedBytes, + "Randen::Absorb() requires kSeedBytes of seed"); + + static_assert(N * sizeof(T) == RandenTraits::kStateBytes, + "Randen::Absorb() requires kStateBytes of state"); +#if ABSL_RANDOM_INTERNAL_AES_DISPATCH + // HW AES Dispatch. + if (has_crypto_) { + RandenHwAes::Absorb(seed, state); + } else { + RandenSlow::Absorb(seed, state); + } +#elif ABSL_HAVE_ACCELERATED_AES + // HW AES is enabled. + RandenHwAes::Absorb(seed, state); +#else + // HW AES is disabled. + RandenSlow::Absorb(seed, state); +#endif + } + + private: + const void* keys_; +#if ABSL_RANDOM_INTERNAL_AES_DISPATCH + bool has_crypto_; +#endif +}; + +} // namespace random_internal ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_RANDOM_INTERNAL_RANDEN_H_ +} // namespace absl + +#endif // ABSL_RANDOM_INTERNAL_RANDEN_H_ |