spdlog

include/spdlog/details/os.h

@@ -0,0 +1,129 @@
+#pragma once
+
+#include<string>
+#include<cstdio>
+#include<ctime>
+#ifdef _WIN32
+#include <Windows.h>
+#endif
+
+namespace spdlog
+{
+namespace details
+{
+namespace os
+{
+
+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(0);
+    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(0);
+    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);
+}
+
+#ifdef _WIN32
+inline const char* eol()
+{
+    return "\r\n";
+}
+#else
+constexpr inline const char* eol()
+{
+    return "\n";
+}
+#endif
+
+#ifdef _WIN32
+inline unsigned short eol_size()
+{
+    return 2;
+}
+#else
+constexpr inline unsigned short eol_size()
+{
+    return 1;
+}
+#endif
+
+//fopen_s on non windows for writing
+inline int fopen_s(FILE** fp, const std::string& filename, const char* mode)
+{
+#ifdef _WIN32
+    return ::fopen_s(fp, filename.c_str(), mode);
+#else
+    *fp = fopen((filename.c_str()), mode);
+    return *fp == nullptr;
+#endif
+
+
+}
+
+//Return utc offset in minutes or -1 on failure
+inline int utc_minutes_offset(const std::tm& tm = localtime())
+{
+
+#ifdef _WIN32
+    DYNAMIC_TIME_ZONE_INFORMATION tzinfo;
+    auto rv = GetDynamicTimeZoneInformation(&tzinfo);
+    if (!rv)
+        return -1;
+    return -1 * (tzinfo.Bias + tzinfo.DaylightBias);
+#else
+    return tm.tm_gmtoff / 60;
+#endif
+}
+
+
+} //os
+} //details
+} //spdlog
+
+
+