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49 lines
1.8 KiB
49 lines
1.8 KiB
/*
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* Copyright 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <iterator>
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#include <optional>
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namespace bluetooth {
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namespace os {
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// Return true if |path| exists on disk
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bool FileExists(const std::string& path);
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// Rename file from |from| to |to|
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bool RenameFile(const std::string& from, const std::string& to);
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// Implement ability to read a whole file from |path| into a C++ string, return std::nullopt on failure
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//
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// Do not use this with large files
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std::optional<std::string> ReadSmallFile(const std::string& path);
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// Implement ability to safely write to a file. This function is needed because of deficiencies in existing C++ file
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// libraries, namely:
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// - The ability to open and sync directories with storage media
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// - The ability to block and sync file to storage media
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// Return true on success, false on failure
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bool WriteToFile(const std::string& path, const std::string& data);
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// Remove file and print error message if failed
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// Print error log when file is failed to be removed, hence user should make sure file exists before calling this
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// Return true on success, false on failure (e.g. file not exist, failed to remove, etc)
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bool RemoveFile(const std::string& path);
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} // namespace os
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} // namespace bluetooth
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