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authorthegeorg <thegeorg@yandex-team.ru>2022-02-10 16:45:08 +0300
committerDaniil Cherednik <dcherednik@yandex-team.ru>2022-02-10 16:45:08 +0300
commit4e839db24a3bbc9f1c610c43d6faaaa99824dcca (patch)
tree506dac10f5df94fab310584ee51b24fc5a081c22 /contrib/restricted/abseil-cpp-tstring/y_absl/hash/internal/hash.h
parent2d37894b1b037cf24231090eda8589bbb44fb6fc (diff)
downloadydb-4e839db24a3bbc9f1c610c43d6faaaa99824dcca.tar.gz
Restoring authorship annotation for <thegeorg@yandex-team.ru>. Commit 1 of 2.
Diffstat (limited to 'contrib/restricted/abseil-cpp-tstring/y_absl/hash/internal/hash.h')
-rw-r--r--contrib/restricted/abseil-cpp-tstring/y_absl/hash/internal/hash.h178
1 files changed, 89 insertions, 89 deletions
diff --git a/contrib/restricted/abseil-cpp-tstring/y_absl/hash/internal/hash.h b/contrib/restricted/abseil-cpp-tstring/y_absl/hash/internal/hash.h
index fcbe43accd..32cbbbb27a 100644
--- a/contrib/restricted/abseil-cpp-tstring/y_absl/hash/internal/hash.h
+++ b/contrib/restricted/abseil-cpp-tstring/y_absl/hash/internal/hash.h
@@ -21,7 +21,7 @@
#include <algorithm>
#include <array>
-#include <bitset>
+#include <bitset>
#include <cmath>
#include <cstring>
#include <deque>
@@ -43,8 +43,8 @@
#include "y_absl/base/internal/unaligned_access.h"
#include "y_absl/base/port.h"
#include "y_absl/container/fixed_array.h"
-#include "y_absl/hash/internal/city.h"
-#include "y_absl/hash/internal/low_level_hash.h"
+#include "y_absl/hash/internal/city.h"
+#include "y_absl/hash/internal/low_level_hash.h"
#include "y_absl/meta/type_traits.h"
#include "y_absl/numeric/int128.h"
#include "y_absl/strings/string_view.h"
@@ -380,7 +380,7 @@ template <typename H, typename... Ts>
// This SFINAE gets MSVC confused under some conditions. Let's just disable it
// for now.
H
-#else // _MSC_VER
+#else // _MSC_VER
typename std::enable_if<y_absl::conjunction<is_hashable<Ts>...>::value, H>::type
#endif // _MSC_VER
AbslHashValue(H hash_state, const std::tuple<Ts...>& t) {
@@ -490,9 +490,9 @@ typename std::enable_if<is_hashable<T>::value, H>::type AbslHashValue(
// AbslHashValue for hashing std::vector
//
-// Do not use this for vector<bool> on platforms that have a working
-// implementation of std::hash. It does not have a .data(), and a fallback for
-// std::hash<> is most likely faster.
+// Do not use this for vector<bool> on platforms that have a working
+// implementation of std::hash. It does not have a .data(), and a fallback for
+// std::hash<> is most likely faster.
template <typename H, typename T, typename Allocator>
typename std::enable_if<is_hashable<T>::value && !std::is_same<T, bool>::value,
H>::type
@@ -502,27 +502,27 @@ AbslHashValue(H hash_state, const std::vector<T, Allocator>& vector) {
vector.size());
}
-#if defined(ABSL_IS_BIG_ENDIAN) && \
- (defined(__GLIBCXX__) || defined(__GLIBCPP__))
-// AbslHashValue for hashing std::vector<bool>
-//
-// std::hash in libstdc++ does not work correctly with vector<bool> on Big
-// Endian platforms therefore we need to implement a custom AbslHashValue for
-// it. More details on the bug:
-// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102531
-template <typename H, typename T, typename Allocator>
-typename std::enable_if<is_hashable<T>::value && std::is_same<T, bool>::value,
- H>::type
-AbslHashValue(H hash_state, const std::vector<T, Allocator>& vector) {
- typename H::AbslInternalPiecewiseCombiner combiner;
- for (const auto& i : vector) {
- unsigned char c = static_cast<unsigned char>(i);
- hash_state = combiner.add_buffer(std::move(hash_state), &c, sizeof(c));
- }
- return H::combine(combiner.finalize(std::move(hash_state)), vector.size());
-}
-#endif
-
+#if defined(ABSL_IS_BIG_ENDIAN) && \
+ (defined(__GLIBCXX__) || defined(__GLIBCPP__))
+// AbslHashValue for hashing std::vector<bool>
+//
+// std::hash in libstdc++ does not work correctly with vector<bool> on Big
+// Endian platforms therefore we need to implement a custom AbslHashValue for
+// it. More details on the bug:
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102531
+template <typename H, typename T, typename Allocator>
+typename std::enable_if<is_hashable<T>::value && std::is_same<T, bool>::value,
+ H>::type
+AbslHashValue(H hash_state, const std::vector<T, Allocator>& vector) {
+ typename H::AbslInternalPiecewiseCombiner combiner;
+ for (const auto& i : vector) {
+ unsigned char c = static_cast<unsigned char>(i);
+ hash_state = combiner.add_buffer(std::move(hash_state), &c, sizeof(c));
+ }
+ return H::combine(combiner.finalize(std::move(hash_state)), vector.size());
+}
+#endif
+
// -----------------------------------------------------------------------------
// AbslHashValue for Ordered Associative Containers
// -----------------------------------------------------------------------------
@@ -615,29 +615,29 @@ AbslHashValue(H hash_state, const y_absl::variant<T...>& v) {
// AbslHashValue for Other Types
// -----------------------------------------------------------------------------
-// AbslHashValue for hashing std::bitset is not defined on Little Endian
-// platforms, for the same reason as for vector<bool> (see std::vector above):
-// It does not expose the raw bytes, and a fallback to std::hash<> is most
-// likely faster.
-
-#if defined(ABSL_IS_BIG_ENDIAN) && \
- (defined(__GLIBCXX__) || defined(__GLIBCPP__))
-// AbslHashValue for hashing std::bitset
-//
-// std::hash in libstdc++ does not work correctly with std::bitset on Big Endian
-// platforms therefore we need to implement a custom AbslHashValue for it. More
-// details on the bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102531
-template <typename H, size_t N>
-H AbslHashValue(H hash_state, const std::bitset<N>& set) {
- typename H::AbslInternalPiecewiseCombiner combiner;
- for (int i = 0; i < N; i++) {
- unsigned char c = static_cast<unsigned char>(set[i]);
- hash_state = combiner.add_buffer(std::move(hash_state), &c, sizeof(c));
- }
- return H::combine(combiner.finalize(std::move(hash_state)), N);
-}
-#endif
-
+// AbslHashValue for hashing std::bitset is not defined on Little Endian
+// platforms, for the same reason as for vector<bool> (see std::vector above):
+// It does not expose the raw bytes, and a fallback to std::hash<> is most
+// likely faster.
+
+#if defined(ABSL_IS_BIG_ENDIAN) && \
+ (defined(__GLIBCXX__) || defined(__GLIBCPP__))
+// AbslHashValue for hashing std::bitset
+//
+// std::hash in libstdc++ does not work correctly with std::bitset on Big Endian
+// platforms therefore we need to implement a custom AbslHashValue for it. More
+// details on the bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102531
+template <typename H, size_t N>
+H AbslHashValue(H hash_state, const std::bitset<N>& set) {
+ typename H::AbslInternalPiecewiseCombiner combiner;
+ for (int i = 0; i < N; i++) {
+ unsigned char c = static_cast<unsigned char>(set[i]);
+ hash_state = combiner.add_buffer(std::move(hash_state), &c, sizeof(c));
+ }
+ return H::combine(combiner.finalize(std::move(hash_state)), N);
+}
+#endif
+
// -----------------------------------------------------------------------------
// hash_range_or_bytes()
@@ -756,8 +756,8 @@ template <typename T>
struct is_hashable
: std::integral_constant<bool, HashSelect::template Apply<T>::value> {};
-// MixingHashState
-class ABSL_DLL MixingHashState : public HashStateBase<MixingHashState> {
+// MixingHashState
+class ABSL_DLL MixingHashState : public HashStateBase<MixingHashState> {
// y_absl::uint128 is not an alias or a thin wrapper around the intrinsic.
// We use the intrinsic when available to improve performance.
#ifdef ABSL_HAVE_INTRINSIC_INT128
@@ -776,23 +776,23 @@ class ABSL_DLL MixingHashState : public HashStateBase<MixingHashState> {
public:
// Move only
- MixingHashState(MixingHashState&&) = default;
- MixingHashState& operator=(MixingHashState&&) = default;
+ MixingHashState(MixingHashState&&) = default;
+ MixingHashState& operator=(MixingHashState&&) = default;
- // MixingHashState::combine_contiguous()
+ // MixingHashState::combine_contiguous()
//
// Fundamental base case for hash recursion: mixes the given range of bytes
// into the hash state.
- static MixingHashState combine_contiguous(MixingHashState hash_state,
- const unsigned char* first,
- size_t size) {
- return MixingHashState(
+ static MixingHashState combine_contiguous(MixingHashState hash_state,
+ const unsigned char* first,
+ size_t size) {
+ return MixingHashState(
CombineContiguousImpl(hash_state.state_, first, size,
std::integral_constant<int, sizeof(size_t)>{}));
}
- using MixingHashState::HashStateBase::combine_contiguous;
+ using MixingHashState::HashStateBase::combine_contiguous;
- // MixingHashState::hash()
+ // MixingHashState::hash()
//
// For performance reasons in non-opt mode, we specialize this for
// integral types.
@@ -804,24 +804,24 @@ class ABSL_DLL MixingHashState : public HashStateBase<MixingHashState> {
return static_cast<size_t>(Mix(Seed(), static_cast<uint64_t>(value)));
}
- // Overload of MixingHashState::hash()
+ // Overload of MixingHashState::hash()
template <typename T, y_absl::enable_if_t<!IntegralFastPath<T>::value, int> = 0>
static size_t hash(const T& value) {
- return static_cast<size_t>(combine(MixingHashState{}, value).state_);
+ return static_cast<size_t>(combine(MixingHashState{}, value).state_);
}
private:
// Invoked only once for a given argument; that plus the fact that this is
// move-only ensures that there is only one non-moved-from object.
- MixingHashState() : state_(Seed()) {}
+ MixingHashState() : state_(Seed()) {}
// Workaround for MSVC bug.
// We make the type copyable to fix the calling convention, even though we
// never actually copy it. Keep it private to not affect the public API of the
// type.
- MixingHashState(const MixingHashState&) = default;
+ MixingHashState(const MixingHashState&) = default;
- explicit MixingHashState(uint64_t state) : state_(state) {}
+ explicit MixingHashState(uint64_t state) : state_(state) {}
// Implementation of the base case for combine_contiguous where we actually
// mix the bytes into the state.
@@ -898,15 +898,15 @@ class ABSL_DLL MixingHashState : public HashStateBase<MixingHashState> {
}
ABSL_ATTRIBUTE_ALWAYS_INLINE static uint64_t Mix(uint64_t state, uint64_t v) {
-#if defined(__aarch64__)
- // On AArch64, calculating a 128-bit product is inefficient, because it
- // requires a sequence of two instructions to calculate the upper and lower
- // halves of the result.
- using MultType = uint64_t;
-#else
+#if defined(__aarch64__)
+ // On AArch64, calculating a 128-bit product is inefficient, because it
+ // requires a sequence of two instructions to calculate the upper and lower
+ // halves of the result.
+ using MultType = uint64_t;
+#else
using MultType =
y_absl::conditional_t<sizeof(size_t) == 4, uint64_t, uint128>;
-#endif
+#endif
// We do the addition in 64-bit space to make sure the 128-bit
// multiplication is fast. If we were to do it as MultType the compiler has
// to assume that the high word is non-zero and needs to perform 2
@@ -916,16 +916,16 @@ class ABSL_DLL MixingHashState : public HashStateBase<MixingHashState> {
return static_cast<uint64_t>(m ^ (m >> (sizeof(m) * 8 / 2)));
}
- // An extern to avoid bloat on a direct call to LowLevelHash() with fixed
- // values for both the seed and salt parameters.
- static uint64_t LowLevelHashImpl(const unsigned char* data, size_t len);
+ // An extern to avoid bloat on a direct call to LowLevelHash() with fixed
+ // values for both the seed and salt parameters.
+ static uint64_t LowLevelHashImpl(const unsigned char* data, size_t len);
ABSL_ATTRIBUTE_ALWAYS_INLINE static uint64_t Hash64(const unsigned char* data,
size_t len) {
#ifdef ABSL_HAVE_INTRINSIC_INT128
- return LowLevelHashImpl(data, len);
+ return LowLevelHashImpl(data, len);
#else
- return hash_internal::CityHash64(reinterpret_cast<const char*>(data), len);
+ return hash_internal::CityHash64(reinterpret_cast<const char*>(data), len);
#endif
}
@@ -960,8 +960,8 @@ class ABSL_DLL MixingHashState : public HashStateBase<MixingHashState> {
uint64_t state_;
};
-// MixingHashState::CombineContiguousImpl()
-inline uint64_t MixingHashState::CombineContiguousImpl(
+// MixingHashState::CombineContiguousImpl()
+inline uint64_t MixingHashState::CombineContiguousImpl(
uint64_t state, const unsigned char* first, size_t len,
std::integral_constant<int, 4> /* sizeof_size_t */) {
// For large values we use CityHash, for small ones we just use a
@@ -971,7 +971,7 @@ inline uint64_t MixingHashState::CombineContiguousImpl(
if (ABSL_PREDICT_FALSE(len > PiecewiseChunkSize())) {
return CombineLargeContiguousImpl32(state, first, len);
}
- v = hash_internal::CityHash32(reinterpret_cast<const char*>(first), len);
+ v = hash_internal::CityHash32(reinterpret_cast<const char*>(first), len);
} else if (len >= 4) {
v = Read4To8(first, len);
} else if (len > 0) {
@@ -983,12 +983,12 @@ inline uint64_t MixingHashState::CombineContiguousImpl(
return Mix(state, v);
}
-// Overload of MixingHashState::CombineContiguousImpl()
-inline uint64_t MixingHashState::CombineContiguousImpl(
+// Overload of MixingHashState::CombineContiguousImpl()
+inline uint64_t MixingHashState::CombineContiguousImpl(
uint64_t state, const unsigned char* first, size_t len,
std::integral_constant<int, 8> /* sizeof_size_t */) {
- // For large values we use LowLevelHash or CityHash depending on the platform,
- // for small ones we just use a multiplicative hash.
+ // For large values we use LowLevelHash or CityHash depending on the platform,
+ // for small ones we just use a multiplicative hash.
uint64_t v;
if (len > 16) {
if (ABSL_PREDICT_FALSE(len > PiecewiseChunkSize())) {
@@ -1025,9 +1025,9 @@ struct PoisonedHash : private AggregateBarrier {
template <typename T>
struct HashImpl {
- size_t operator()(const T& value) const {
- return MixingHashState::hash(value);
- }
+ size_t operator()(const T& value) const {
+ return MixingHashState::hash(value);
+ }
};
template <typename T>