56 lines
2.1 KiB
C++
56 lines
2.1 KiB
C++
// 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/hash/internal/hash.h"
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namespace absl {
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ABSL_NAMESPACE_BEGIN
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namespace hash_internal {
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uint64_t CityHashState::CombineLargeContiguousImpl32(uint64_t state,
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const unsigned char* first,
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size_t len) {
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while (len >= PiecewiseChunkSize()) {
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state =
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Mix(state, absl::hash_internal::CityHash32(reinterpret_cast<const char*>(first),
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PiecewiseChunkSize()));
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len -= PiecewiseChunkSize();
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first += PiecewiseChunkSize();
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}
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// Handle the remainder.
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return CombineContiguousImpl(state, first, len,
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std::integral_constant<int, 4>{});
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}
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uint64_t CityHashState::CombineLargeContiguousImpl64(uint64_t state,
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const unsigned char* first,
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size_t len) {
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while (len >= PiecewiseChunkSize()) {
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state =
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Mix(state, absl::hash_internal::CityHash64(reinterpret_cast<const char*>(first),
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PiecewiseChunkSize()));
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len -= PiecewiseChunkSize();
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first += PiecewiseChunkSize();
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}
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// Handle the remainder.
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return CombineContiguousImpl(state, first, len,
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std::integral_constant<int, 8>{});
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}
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ABSL_CONST_INIT const void* const CityHashState::kSeed = &kSeed;
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} // namespace hash_internal
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ABSL_NAMESPACE_END
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} // namespace absl
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