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65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
#pragma once
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#include "base/macros.hpp"
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#include <cstddef>
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#include <cstdint>
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#include <functional>
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#include <string>
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namespace base
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{
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class FileData
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{
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public:
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/// @note Do not change order (@see FileData::FileData).
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enum class Op { READ = 0, WRITE_TRUNCATE, WRITE_EXISTING, APPEND };
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FileData(std::string const & fileName, Op op);
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~FileData();
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uint64_t Size() const;
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uint64_t Pos() const;
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void Seek(uint64_t pos);
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void Read(uint64_t pos, void * p, size_t size);
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void Write(void const * p, size_t size);
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void Flush();
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void Truncate(uint64_t sz);
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std::string const & GetName() const { return m_FileName; }
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private:
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FILE * m_File;
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const std::string m_FileName;
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const Op m_Op;
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std::string GetErrorProlog() const;
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DISALLOW_COPY(FileData);
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};
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bool GetFileSize(std::string const & fName, uint64_t & sz);
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bool DeleteFileX(std::string const & fName);
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bool RenameFileX(std::string const & fOld, std::string const & fNew);
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/// Write to temp file and rename it to dest. Delete temp on failure.
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/// @param write function that writes to file with a given name, returns true on success.
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bool WriteToTempAndRenameToFile(std::string const & dest,
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std::function<bool(std::string const &)> const & write,
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std::string const & tmp = "");
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void AppendFileToFile(std::string const & fromFilename, std::string const & toFilename);
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/// @return false if copy fails. DOES NOT THROWS exceptions
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bool CopyFileX(std::string const & fOld, std::string const & fNew);
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/// @return false if moving fails. DOES NOT THROW exceptions
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bool MoveFileX(std::string const & fOld, std::string const & fNew);
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bool IsEqualFiles(std::string const & firstFile, std::string const & secondFile);
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std::vector<uint8_t> ReadFile(std::string const & filePath);
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} // namespace base
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