import quincy beta 17.1.0

[ceph.git] / ceph / src / include / utime_fmt.h

diff --git a/ceph/src/include/utime_fmt.h b/ceph/src/include/utime_fmt.h
new file mode 100644 (file)
index 0000000..44c9a40
--- /dev/null
+++ b/ceph/src/include/utime_fmt.h
@@ -0,0 +1,32 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+#pragma once
+/**
+ * \file fmtlib formatter for utime_t
+ */
+#include <fmt/format.h>
+#include <fmt/chrono.h>
+
+#include <string_view>
+
+#include "include/utime.h"
+
+template <>
+struct fmt::formatter<utime_t> {
+  constexpr auto parse(format_parse_context& ctx) { return ctx.begin(); }
+
+  template <typename FormatContext>
+  auto format(const utime_t& utime, FormatContext& ctx)
+  {
+    if (utime.sec() < ((time_t)(60 * 60 * 24 * 365 * 10))) {
+      // raw seconds.  this looks like a relative time.
+      return fmt::format_to(ctx.out(), "{}.{:06}", (long)utime.sec(),
+                            utime.usec());
+    }
+
+    // this looks like an absolute time.
+    // conform to http://en.wikipedia.org/wiki/ISO_8601
+    auto asgmt = fmt::gmtime(utime.sec());
+    return fmt::format_to(ctx.out(), "{:%FT%T}.{:06}{:%z}", asgmt, utime.usec(), asgmt);
+  }
+};