// Copyright(c) 2015-present, Gabi Melman & spdlog contributors. // Distributed under the MIT License (http://opensource.org/licenses/MIT) #pragma once #include <spdlog/common.h> #include <tuple> namespace spdlog { namespace details { // Helper class for file sinks. // When failing to open a file, retry several times(5) with a delay interval(10 ms). // Throw spdlog_ex exception on errors. class SPDLOG_API file_helper { public: explicit file_helper() = default; file_helper(const file_helper &) = delete; file_helper &operator=(const file_helper &) = delete; ~file_helper(); void open(const filename_t &fname, bool truncate = false); void reopen(bool truncate); void flush(); void close(); void write(const memory_buf_t &buf); size_t size() const; const filename_t &filename() const; // // return file path and its extension: // // "mylog.txt" => ("mylog", ".txt") // "mylog" => ("mylog", "") // "mylog." => ("mylog.", "") // "/dir1/dir2/mylog.txt" => ("/dir1/dir2/mylog", ".txt") // // the starting dot in filenames is ignored (hidden files): // // ".mylog" => (".mylog". "") // "my_folder/.mylog" => ("my_folder/.mylog", "") // "my_folder/.mylog.txt" => ("my_folder/.mylog", ".txt") static std::tuple<filename_t, filename_t> split_by_extension(const filename_t &fname); private: const int open_tries_ = 5; const int open_interval_ = 10; std::FILE *fd_{nullptr}; filename_t filename_; }; } // namespace details } // namespace spdlog #ifdef SPDLOG_HEADER_ONLY #include "file_helper-inl.h" #endif