// Copyright 2022 The Centipede 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 FUZZTEST_COMMON_DEFS_H_

#define FUZZTEST_COMMON_DEFS_H_

// Only simple definitions here. No code, no dependencies.

// span.h is an exception as it's header-only and very simple.

#include <cstdint>

#include <random>

#include <string>

#include <string_view>

#include <vector>

#include "absl/types/span.h"

namespace centipede {

// Just a good random number generator.

using Rng = std::mt19937_64;

using ByteArray = std::vector<uint8_t>;

using ByteSpan = absl::Span<const uint8_t>;

// Wraps a container's data into a `ByteSpan`. The lifetime of `blob` should be

// >= that of the returned object.

template <typename Container>

ByteSpan AsByteSpan(const Container &blob) {

  return ByteSpan(reinterpret_cast<const uint8_t *>(blob.data()),

                  blob.size() * sizeof(typename Container::value_type));

}

// Reinterprets a `ByteSpan` as a string_view pointing at the same data. The

// lifetime of `str` should be >= that of the returned object.

inline std::string_view AsStringView(ByteSpan str) {

  return std::string_view(reinterpret_cast<const char *>(str.data()),

                          str.size());

}

inline std::string AsString(ByteSpan str) {

  return std::string(AsStringView(str));

}

// Macro used to allow tests to access protected or private members of a class.

#define FRIEND_TEST(test_case_name, test_name) \

  friend class test_case_name##_##test_name##_Test

}  // namespace centipede

#endif  // FUZZTEST_COMMON_DEFS_H_