//

// 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_BASE_INTERNAL_UNALIGNED_ACCESS_H_

#define ABSL_BASE_INTERNAL_UNALIGNED_ACCESS_H_

#include <string.h>

#include <cstdint>

#include "absl/base/attributes.h"

#include "absl/base/config.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 absl {

ABSL_NAMESPACE_BEGIN

namespace base_internal {

inline uint16_t UnalignedLoad16(const void *p) {

  uint16_t t;

  memcpy(&t, p, sizeof t);

  return t;

}

inline uint32_t UnalignedLoad32(const void *p) {

  uint32_t t;

  memcpy(&t, p, sizeof t);

  return t;

}

inline uint64_t UnalignedLoad64(const void *p) {

  uint64_t t;

  memcpy(&t, p, sizeof t);

  return t;

}

inline void UnalignedStore16(void *p, uint16_t v) { memcpy(p, &v, sizeof v); }

inline void UnalignedStore32(void *p, uint32_t v) { memcpy(p, &v, sizeof v); }

inline void UnalignedStore64(void *p, uint64_t v) { memcpy(p, &v, sizeof v); }

}  // namespace base_internal

ABSL_NAMESPACE_END

}  // namespace absl

#define ABSL_INTERNAL_UNALIGNED_LOAD16(_p) \

  (absl::base_internal::UnalignedLoad16(_p))

#define ABSL_INTERNAL_UNALIGNED_LOAD32(_p) \

  (absl::base_internal::UnalignedLoad32(_p))

#define ABSL_INTERNAL_UNALIGNED_LOAD64(_p) \

  (absl::base_internal::UnalignedLoad64(_p))

#define ABSL_INTERNAL_UNALIGNED_STORE16(_p, _val) \

  (absl::base_internal::UnalignedStore16(_p, _val))

#define ABSL_INTERNAL_UNALIGNED_STORE32(_p, _val) \

  (absl::base_internal::UnalignedStore32(_p, _val))

#define ABSL_INTERNAL_UNALIGNED_STORE64(_p, _val) \

  (absl::base_internal::UnalignedStore64(_p, _val))

#endif  // defined(__cplusplus), end of unaligned API

#endif  // ABSL_BASE_INTERNAL_UNALIGNED_ACCESS_H_