chromium/third_party/fuzztest/src/fuzztest/internal/io.cc

// Copyright 2022 Google LLC
//
// 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.

#include "./fuzztest/internal/io.h"

#include <cerrno>
#include <cstdio>
#include <cstring>
#include <filesystem>
#include <fstream>
#include <optional>
#include <sstream>
#include <string>
#include <string_view>
#include <tuple>
#include <utility>
#include <vector>

#include "absl/hash/hash.h"
#include "absl/strings/str_format.h"
#include "absl/strings/string_view.h"
#include "./fuzztest/internal/logging.h"

#if defined(__APPLE__)
#if (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) &&       \
     __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_15) || \
    (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) &&      \
     __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_13_0)
// std::filesystem requires macOS 10.15+ or iOS 13+.
// Just stub out these functions.
#define FUZZTEST_STUB_FILESYSTEM
#endif
#endif

namespace fuzztest::internal {

#if defined(FUZZTEST_STUB_FILESYSTEM)

// TODO(lszekeres): Return absl::Status instead of bool for these.

bool WriteFile(absl::string_view path, absl::string_view contents) {
  FUZZTEST_INTERNAL_CHECK(false, "Filesystem API not supported in iOS/MacOS");
}

std::optional<std::string> ReadFile(absl::string_view path) {
  FUZZTEST_INTERNAL_CHECK(false, "Filesystem API not supported in iOS/MacOS");
}

bool IsDirectory(absl::string_view path) {
  FUZZTEST_INTERNAL_CHECK(false, "Filesystem API not supported in iOS/MacOS");
}

bool CreateDirectory(absl::string_view path) {
  FUZZTEST_INTERNAL_CHECK(false, "Filesystem API not supported in iOS/MacOS");
}

std::vector<std::string> ListDirectory(absl::string_view path) {
  FUZZTEST_INTERNAL_CHECK(false, "Filesystem API not supported in iOS/MacOS");
}

std::vector<std::string> ListDirectoryRecursively(absl::string_view path) {
  FUZZTEST_INTERNAL_CHECK(false, "Filesystem API not supported in iOS/MacOS");
}

#else

bool WriteFile(absl::string_view path, absl::string_view contents) { … }

std::optional<std::string> ReadFile(absl::string_view path) { … }

bool IsDirectory(absl::string_view path) { … }

bool CreateDirectory(absl::string_view path) { … }

std::vector<std::string> ListDirectory(absl::string_view path) { … }

std::vector<std::string> ListDirectoryRecursively(absl::string_view path) { … }

#endif  // FUZZTEST_STUB_FILESYSTEM

std::string WriteDataToDir(absl::string_view data, absl::string_view outdir) { … }

std::vector<FilePathAndData> ReadFileOrDirectory(
    absl::string_view file_or_dir) { … }

absl::string_view Basename(absl::string_view filename) { … }

std::vector<std::tuple<std::string>> ReadFilesFromDirectory(
    absl::string_view dir) { … }

}  // namespace fuzztest::internal