X-Git-Url: https://git.mdrn.pl/wl-app.git/blobdiff_plain/53b27422d140022594fc241cca91c3183be57bca..48b2fe9f7c2dc3d9aeaaa6dbfb27c7da4f3235ff:/iOS/Pods/Realm/include/util/time.hpp

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+////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2017 Realm Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////
+
+#ifndef REALM_OS_UTIL_TIME_HPP
+#define REALM_OS_UTIL_TIME_HPP
+
+#include <cstring>
+#include <ctime>
+#include <string>
+#include <system_error>
+
+namespace realm {
+namespace util {
+
+// Like std::localtime, but safe with reentrancy and multiple threads.
+inline std::tm localtime(std::time_t time)
+{
+    std::tm calendar_time;
+#ifdef _WIN32
+    // note that VC++'s localtime_s has a different signature from what C++11 specifies
+    auto error = localtime_s(&calendar_time, &time);
+    if (error)
+        throw std::system_error(error, std::system_category());
+#else
+    auto result = localtime_r(&time, &calendar_time);
+    if (!result)
+        throw std::system_error(errno, std::system_category());
+#endif
+
+    return calendar_time;
+}
+
+// Like std::put_time, but compatible with GCC 4.9.
+inline std::string put_time(std::time_t time, const char *format)
+{
+    std::tm calendar_time = localtime(time);
+    size_t estimated_length = std::strlen(format) + 1;
+
+    size_t formatted_length;
+    std::string buffer;
+
+    // Loop until the buffer is large enough to hold the string generated by `strftime`, growing the
+    // buffer by 8 characters whenever it is too small to hold the resulting string.
+    do {
+        buffer.resize(estimated_length);
+        formatted_length = strftime(&buffer[0], buffer.size(), format, &calendar_time);
+        estimated_length += 8;
+    } while (formatted_length == 0);
+
+    buffer.resize(formatted_length);
+    return buffer;
+}
+
+} // namespace util
+} // namespace realm
+
+#endif // REALM_OS_UTIL_TIME_HPP