added iOS source code

[wl-app.git] / iOS / Pods / Realm / include / core / realm / util / time.hpp

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+/*************************************************************************
+ *
+ * REALM CONFIDENTIAL
+ * __________________
+ *
+ *  [2011] - [2016] Realm Inc
+ *  All Rights Reserved.
+ *
+ * NOTICE:  All information contained herein is, and remains
+ * the property of Realm Incorporated and its suppliers,
+ * if any.  The intellectual and technical concepts contained
+ * herein are proprietary to Realm Incorporated
+ * and its suppliers and may be covered by U.S. and Foreign Patents,
+ * patents in process, and are protected by trade secret or copyright law.
+ * Dissemination of this information or reproduction of this material
+ * is strictly forbidden unless prior written permission is obtained
+ * from Realm Incorporated.
+ *
+ **************************************************************************/
+
+#ifndef REALM_UTIL_TIME_HPP
+#define REALM_UTIL_TIME_HPP
+
+#include <cstring>
+#include <ctime>
+#include <iterator>
+#include <locale>
+#include <ostream>
+#include <sstream>
+
+
+namespace realm {
+namespace util {
+
+/// Thread safe version of std::localtime(). Uses localtime_r() on POSIX.
+std::tm localtime(std::time_t);
+
+/// Thread safe version of std::gmtime(). Uses gmtime_r() on POSIX.
+std::tm gmtime(std::time_t);
+
+/// Similar to std::put_time() from <iomanip>. See std::put_time() for
+/// information about the format string. This function is provided because
+/// std::put_time() is unavailable in GCC 4. This function is thread safe.
+///
+/// The default format is ISO 8601 date and time.
+template<class C, class T>
+void put_time(std::basic_ostream<C,T>&, const std::tm&, const C* format = "%FT%T%z");
+
+/// @{ These functions combine localtime() or gmtime() with put_time() and
+/// std::ostringstream. For detals on the format string, see
+/// std::put_time(). These function are thread safe.
+std::string format_local_time(std::time_t, const char* format = "%FT%T%z");
+std::string format_utc_time(std::time_t, const char* format = "%FT%T%z");
+/// @}
+
+
+
+
+// Implementation
+
+template<class C, class T>
+inline void put_time(std::basic_ostream<C,T>& out, const std::tm& tm, const C* format)
+{
+    const auto& facet = std::use_facet<std::time_put<C>>(out.getloc()); // Throws
+    facet.put(std::ostreambuf_iterator<C>(out), out, ' ', &tm,
+              format, format + T::length(format)); // Throws
+}
+
+inline std::string format_local_time(std::time_t time, const char* format)
+{
+    std::tm tm = util::localtime(time);
+    std::ostringstream out;
+    util::put_time(out, tm, format); // Throws
+    return out.str(); // Throws
+}
+
+inline std::string format_utc_time(std::time_t time, const char* format)
+{
+    std::tm tm = util::gmtime(time);
+    std::ostringstream out;
+    util::put_time(out, tm, format); // Throws
+    return out.str(); // Throws
+}
+
+} // namespace util
+} // namespace realm
+
+#endif // REALM_UTIL_TIME_HPP