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diff --git a/lib/spdlog/details/os.h b/lib/spdlog/details/os.h
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+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+#pragma once
+
+#include "../common.h"
+
+#include <algorithm>
+#include <chrono>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+#include <functional>
+#include <string>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <thread>
+
+#ifdef _WIN32
+
+#ifndef NOMINMAX
+#define NOMINMAX // prevent windows redefining min/max
+#endif
+
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#include <io.h> // _get_osfhandle and _isatty support
+#include <process.h> // _get_pid support
+#include <windows.h>
+
+#ifdef __MINGW32__
+#include <share.h>
+#endif
+
+#else // unix
+
+#include <fcntl.h>
+#include <unistd.h>
+
+#ifdef __linux__
+#include <sys/syscall.h> //Use gettid() syscall under linux to get thread id
+
+#elif __FreeBSD__
+#include <sys/thr.h> //Use thr_self() syscall under FreeBSD to get thread id
+#endif
+
+#endif // unix
+
+#ifndef __has_feature // Clang - feature checking macros.
+#define __has_feature(x) 0 // Compatibility with non-clang compilers.
+#endif
+
+namespace spdlog {
+namespace details {
+namespace os {
+
+inline spdlog::log_clock::time_point now()
+{
+
+#if defined __linux__ && defined SPDLOG_CLOCK_COARSE
+ timespec ts;
+ ::clock_gettime(CLOCK_REALTIME_COARSE, &ts);
+ return std::chrono::time_point<log_clock, typename log_clock::duration>(
+ std::chrono::duration_cast<typename log_clock::duration>(std::chrono::seconds(ts.tv_sec) + std::chrono::nanoseconds(ts.tv_nsec)));
+
+#else
+ return log_clock::now();
+#endif
+}
+inline std::tm localtime(const std::time_t &time_tt)
+{
+
+#ifdef _WIN32
+ std::tm tm;
+ localtime_s(&tm, &time_tt);
+#else
+ std::tm tm;
+ localtime_r(&time_tt, &tm);
+#endif
+ return tm;
+}
+
+inline std::tm localtime()
+{
+ std::time_t now_t = time(nullptr);
+ return localtime(now_t);
+}
+
+inline std::tm gmtime(const std::time_t &time_tt)
+{
+
+#ifdef _WIN32
+ std::tm tm;
+ gmtime_s(&tm, &time_tt);
+#else
+ std::tm tm;
+ gmtime_r(&time_tt, &tm);
+#endif
+ return tm;
+}
+
+inline std::tm gmtime()
+{
+ std::time_t now_t = time(nullptr);
+ return gmtime(now_t);
+}
+inline bool operator==(const std::tm &tm1, const std::tm &tm2)
+{
+ return (tm1.tm_sec == tm2.tm_sec && tm1.tm_min == tm2.tm_min && tm1.tm_hour == tm2.tm_hour && tm1.tm_mday == tm2.tm_mday &&
+ tm1.tm_mon == tm2.tm_mon && tm1.tm_year == tm2.tm_year && tm1.tm_isdst == tm2.tm_isdst);
+}
+
+inline bool operator!=(const std::tm &tm1, const std::tm &tm2)
+{
+ return !(tm1 == tm2);
+}
+
+// eol definition
+#if !defined(SPDLOG_EOL)
+#ifdef _WIN32
+#define SPDLOG_EOL "\r\n"
+#else
+#define SPDLOG_EOL "\n"
+#endif
+#endif
+
+SPDLOG_CONSTEXPR static const char *default_eol = SPDLOG_EOL;
+
+// folder separator
+#ifdef _WIN32
+SPDLOG_CONSTEXPR static const char folder_sep = '\\';
+#else
+SPDLOG_CONSTEXPR static const char folder_sep = '/';
+#endif
+
+inline void prevent_child_fd(FILE *f)
+{
+
+#ifdef _WIN32
+#if !defined(__cplusplus_winrt)
+ auto file_handle = (HANDLE)_get_osfhandle(_fileno(f));
+ if (!::SetHandleInformation(file_handle, HANDLE_FLAG_INHERIT, 0))
+ throw spdlog_ex("SetHandleInformation failed", errno);
+#endif
+#else
+ auto fd = fileno(f);
+ if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
+ {
+ throw spdlog_ex("fcntl with FD_CLOEXEC failed", errno);
+ }
+#endif
+}
+
+// fopen_s on non windows for writing
+inline bool fopen_s(FILE **fp, const filename_t &filename, const filename_t &mode)
+{
+#ifdef _WIN32
+#ifdef SPDLOG_WCHAR_FILENAMES
+ *fp = _wfsopen((filename.c_str()), mode.c_str(), _SH_DENYWR);
+#else
+ *fp = _fsopen((filename.c_str()), mode.c_str(), _SH_DENYWR);
+#endif
+#else // unix
+ *fp = fopen((filename.c_str()), mode.c_str());
+#endif
+
+#ifdef SPDLOG_PREVENT_CHILD_FD
+ if (*fp != nullptr)
+ {
+ prevent_child_fd(*fp);
+ }
+#endif
+ return *fp == nullptr;
+}
+
+inline int remove(const filename_t &filename)
+{
+#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
+ return _wremove(filename.c_str());
+#else
+ return std::remove(filename.c_str());
+#endif
+}
+
+inline int rename(const filename_t &filename1, const filename_t &filename2)
+{
+#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
+ return _wrename(filename1.c_str(), filename2.c_str());
+#else
+ return std::rename(filename1.c_str(), filename2.c_str());
+#endif
+}
+
+// Return if file exists
+inline bool file_exists(const filename_t &filename)
+{
+#ifdef _WIN32
+#ifdef SPDLOG_WCHAR_FILENAMES
+ auto attribs = GetFileAttributesW(filename.c_str());
+#else
+ auto attribs = GetFileAttributesA(filename.c_str());
+#endif
+ return (attribs != INVALID_FILE_ATTRIBUTES && !(attribs & FILE_ATTRIBUTE_DIRECTORY));
+#else // common linux/unix all have the stat system call
+ struct stat buffer;
+ return (stat(filename.c_str(), &buffer) == 0);
+#endif
+}
+
+// Return file size according to open FILE* object
+inline size_t filesize(FILE *f)
+{
+ if (f == nullptr)
+ {
+ throw spdlog_ex("Failed getting file size. fd is null");
+ }
+#if defined(_WIN32) && !defined(__CYGWIN__)
+ int fd = _fileno(f);
+#if _WIN64 // 64 bits
+ struct _stat64 st;
+ if (_fstat64(fd, &st) == 0)
+ {
+ return st.st_size;
+ }
+
+#else // windows 32 bits
+ long ret = _filelength(fd);
+ if (ret >= 0)
+ {
+ return static_cast<size_t>(ret);
+ }
+#endif
+
+#else // unix
+ int fd = fileno(f);
+ // 64 bits(but not in osx or cygwin, where fstat64 is deprecated)
+#if !defined(__FreeBSD__) && !defined(__APPLE__) && (defined(__x86_64__) || defined(__ppc64__)) && !defined(__CYGWIN__)
+ struct stat64 st;
+ if (fstat64(fd, &st) == 0)
+ {
+ return static_cast<size_t>(st.st_size);
+ }
+#else // unix 32 bits or cygwin
+ struct stat st;
+
+ if (fstat(fd, &st) == 0)
+ {
+ return static_cast<size_t>(st.st_size);
+ }
+#endif
+#endif
+ throw spdlog_ex("Failed getting file size from fd", errno);
+}
+
+// Return utc offset in minutes or throw spdlog_ex on failure
+inline int utc_minutes_offset(const std::tm &tm = details::os::localtime())
+{
+
+#ifdef _WIN32
+#if _WIN32_WINNT < _WIN32_WINNT_WS08
+ TIME_ZONE_INFORMATION tzinfo;
+ auto rv = GetTimeZoneInformation(&tzinfo);
+#else
+ DYNAMIC_TIME_ZONE_INFORMATION tzinfo;
+ auto rv = GetDynamicTimeZoneInformation(&tzinfo);
+#endif
+ if (rv == TIME_ZONE_ID_INVALID)
+ throw spdlog::spdlog_ex("Failed getting timezone info. ", errno);
+
+ int offset = -tzinfo.Bias;
+ if (tm.tm_isdst)
+ {
+ offset -= tzinfo.DaylightBias;
+ }
+ else
+ {
+ offset -= tzinfo.StandardBias;
+ }
+ return offset;
+#else
+
+#if defined(sun) || defined(__sun) || defined(_AIX)
+ // 'tm_gmtoff' field is BSD extension and it's missing on SunOS/Solaris
+ struct helper
+ {
+ static long int calculate_gmt_offset(const std::tm &localtm = details::os::localtime(), const std::tm &gmtm = details::os::gmtime())
+ {
+ int local_year = localtm.tm_year + (1900 - 1);
+ int gmt_year = gmtm.tm_year + (1900 - 1);
+
+ long int days = (
+ // difference in day of year
+ localtm.tm_yday -
+ gmtm.tm_yday
+
+ // + intervening leap days
+ + ((local_year >> 2) - (gmt_year >> 2)) - (local_year / 100 - gmt_year / 100) +
+ ((local_year / 100 >> 2) - (gmt_year / 100 >> 2))
+
+ // + difference in years * 365 */
+ + (long int)(local_year - gmt_year) * 365);
+
+ long int hours = (24 * days) + (localtm.tm_hour - gmtm.tm_hour);
+ long int mins = (60 * hours) + (localtm.tm_min - gmtm.tm_min);
+ long int secs = (60 * mins) + (localtm.tm_sec - gmtm.tm_sec);
+
+ return secs;
+ }
+ };
+
+ auto offset_seconds = helper::calculate_gmt_offset(tm);
+#else
+ auto offset_seconds = tm.tm_gmtoff;
+#endif
+
+ return static_cast<int>(offset_seconds / 60);
+#endif
+}
+
+// Return current thread id as size_t
+// It exists because the std::this_thread::get_id() is much slower(especially under VS 2013)
+inline size_t _thread_id()
+{
+#ifdef _WIN32
+ return static_cast<size_t>(::GetCurrentThreadId());
+#elif __linux__
+#if defined(__ANDROID__) && defined(__ANDROID_API__) && (__ANDROID_API__ < 21)
+#define SYS_gettid __NR_gettid
+#endif
+ return static_cast<size_t>(syscall(SYS_gettid));
+#elif __FreeBSD__
+ long tid;
+ thr_self(&tid);
+ return static_cast<size_t>(tid);
+#elif __APPLE__
+ uint64_t tid;
+ pthread_threadid_np(nullptr, &tid);
+ return static_cast<size_t>(tid);
+#else // Default to standard C++11 (other Unix)
+ return static_cast<size_t>(std::hash<std::thread::id>()(std::this_thread::get_id()));
+#endif
+}
+
+// Return current thread id as size_t (from thread local storage)
+inline size_t thread_id()
+{
+#if defined(SPDLOG_DISABLE_TID_CACHING) || (defined(_MSC_VER) && (_MSC_VER < 1900)) || defined(__cplusplus_winrt) || \
+ (defined(__clang__) && !__has_feature(cxx_thread_local))
+ return _thread_id();
+#else // cache thread id in tls
+ static thread_local const size_t tid = _thread_id();
+ return tid;
+#endif
+}
+
+// This is avoid msvc issue in sleep_for that happens if the clock changes.
+// See https://github.com/gabime/spdlog/issues/609
+inline void sleep_for_millis(int milliseconds)
+{
+#if defined(_WIN32)
+ ::Sleep(milliseconds);
+#else
+ std::this_thread::sleep_for(std::chrono::milliseconds(milliseconds));
+#endif
+}
+
+// wchar support for windows file names (SPDLOG_WCHAR_FILENAMES must be defined)
+#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
+#define SPDLOG_FILENAME_T(s) L##s
+inline std::string filename_to_str(const filename_t &filename)
+{
+ std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t> c;
+ return c.to_bytes(filename);
+}
+#else
+#define SPDLOG_FILENAME_T(s) s
+inline std::string filename_to_str(const filename_t &filename)
+{
+ return filename;
+}
+#endif
+
+inline int pid()
+{
+
+#ifdef _WIN32
+ return static_cast<int>(::GetCurrentProcessId());
+#else
+ return static_cast<int>(::getpid());
+#endif
+}
+
+// Determine if the terminal supports colors
+// Source: https://github.com/agauniyal/rang/
+inline bool is_color_terminal()
+{
+#ifdef _WIN32
+ return true;
+#else
+ static constexpr const char *Terms[] = {
+ "ansi", "color", "console", "cygwin", "gnome", "konsole", "kterm", "linux", "msys", "putty", "rxvt", "screen", "vt100", "xterm"};
+
+ const char *env_p = std::getenv("TERM");
+ if (env_p == nullptr)
+ {
+ return false;
+ }
+
+ static const bool result =
+ std::any_of(std::begin(Terms), std::end(Terms), [&](const char *term) { return std::strstr(env_p, term) != nullptr; });
+ return result;
+#endif
+}
+
+// Detrmine if the terminal attached
+// Source: https://github.com/agauniyal/rang/
+inline bool in_terminal(FILE *file)
+{
+
+#ifdef _WIN32
+ return _isatty(_fileno(file)) != 0;
+#else
+ return isatty(fileno(file)) != 0;
+#endif
+}
+} // namespace os
+} // namespace details
+} // namespace spdlog