file_helper.h
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// 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