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//
// 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 Y_ABSL_BASE_INTERNAL_UNALIGNED_ACCESS_H_
#define Y_ABSL_BASE_INTERNAL_UNALIGNED_ACCESS_H_
#include <string.h>
#include <cstdint>
#include "y_absl/base/attributes.h"
#include "y_absl/base/config.h"
#include "y_absl/base/nullability.h"
// unaligned APIs
// Portable handling of unaligned loads, stores, and copies.
// The unaligned API is C++ only. The declarations use C++ features
// (namespaces, inline) which are absent or incompatible in C.
#if defined(__cplusplus)
namespace y_absl {
Y_ABSL_NAMESPACE_BEGIN
namespace base_internal {
inline uint16_t UnalignedLoad16(y_absl::Nonnull<const void *> p) {
uint16_t t;
memcpy(&t, p, sizeof t);
return t;
}
inline uint32_t UnalignedLoad32(y_absl::Nonnull<const void *> p) {
uint32_t t;
memcpy(&t, p, sizeof t);
return t;
}
inline uint64_t UnalignedLoad64(y_absl::Nonnull<const void *> p) {
uint64_t t;
memcpy(&t, p, sizeof t);
return t;
}
inline void UnalignedStore16(y_absl::Nonnull<void *> p, uint16_t v) {
memcpy(p, &v, sizeof v);
}
inline void UnalignedStore32(y_absl::Nonnull<void *> p, uint32_t v) {
memcpy(p, &v, sizeof v);
}
inline void UnalignedStore64(y_absl::Nonnull<void *> p, uint64_t v) {
memcpy(p, &v, sizeof v);
}
} // namespace base_internal
Y_ABSL_NAMESPACE_END
} // namespace y_absl
#define Y_ABSL_INTERNAL_UNALIGNED_LOAD16(_p) \
(y_absl::base_internal::UnalignedLoad16(_p))
#define Y_ABSL_INTERNAL_UNALIGNED_LOAD32(_p) \
(y_absl::base_internal::UnalignedLoad32(_p))
#define Y_ABSL_INTERNAL_UNALIGNED_LOAD64(_p) \
(y_absl::base_internal::UnalignedLoad64(_p))
#define Y_ABSL_INTERNAL_UNALIGNED_STORE16(_p, _val) \
(y_absl::base_internal::UnalignedStore16(_p, _val))
#define Y_ABSL_INTERNAL_UNALIGNED_STORE32(_p, _val) \
(y_absl::base_internal::UnalignedStore32(_p, _val))
#define Y_ABSL_INTERNAL_UNALIGNED_STORE64(_p, _val) \
(y_absl::base_internal::UnalignedStore64(_p, _val))
#endif // defined(__cplusplus), end of unaligned API
#endif // Y_ABSL_BASE_INTERNAL_UNALIGNED_ACCESS_H_
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