chromium/third_party/mediapipe/src/mediapipe/framework/formats/tensor/internal.h

// Copyright 2021 The MediaPipe 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
//
//      http://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 MEDIAPIPE_FRAMEWORK_FORMATS_TENSOR_INTERNAL_H_
#define MEDIAPIPE_FRAMEWORK_FORMATS_TENSOR_INTERNAL_H_

#include <cstdint>
#include <type_traits>

namespace mediapipe {

// Generates unique view id at compile-time using FILE and LINE.
#define TENSOR_UNIQUE_VIEW_TYPE_ID() …

// Generates unique view id at compile-time using FILE and LINE and Type of the
// template view's argument.
#define TENSOR_UNIQUE_VIEW_TYPE_ID_T(T) …

namespace tensor_internal {

#define TENSOR_INT_TO_STRING2(x) …
#define TENSOR_INT_TO_STRING(x) …

// Compile-time hash function
// https://en.wikipedia.org/wiki/Fowler%E2%80%93Noll%E2%80%93Vo_hash_function
constexpr uint64_t kFnvPrime = …;
constexpr uint64_t kFnvOffsetBias = …;
constexpr uint64_t FnvHash64(uint64_t value1, uint64_t value2) { … }
constexpr uint64_t FnvHash64(const char* str, uint64_t hash = kFnvOffsetBias) { … }
template <typename... Ts>
struct TypeList { … };
template <typename, typename>
struct TypeInList { … };
TypeInList<T, TypeList<T, Ts...>>;
TypeInList<T, TypeList<TOther, Ts...>>;

}  // namespace tensor_internal
}  // namespace mediapipe

#endif  // MEDIAPIPE_FRAMEWORK_FORMATS_TENSOR_INTERNAL_H_