1 files changed, 92 insertions, 0 deletions
diff --git a/lib/xtime.h b/lib/xtime.h
new file mode 100644
index 0000000..50eb4f4
--- /dev/null
+++ b/lib/xtime.h
@@ -0,0 +1,92 @@
+/* xtime -- extended-resolution integer timestamps
+
+   Copyright (C) 2005-2006, 2009-2023 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert.  */
+
+#ifndef XTIME_H_
+#define XTIME_H_ 1
+
+/* This file uses _GL_INLINE_HEADER_BEGIN, _GL_INLINE.  */
+#if !_GL_CONFIG_H_INCLUDED
+ #error "Please include config.h first."
+#endif
+
+_GL_INLINE_HEADER_BEGIN
+#ifndef XTIME_INLINE
+# define XTIME_INLINE _GL_INLINE
+#endif
+
+/* xtime_t is a signed type used for timestamps.  It is an integer
+   type that is a count of nanoseconds.  */
+typedef long long int xtime_t;
+#define XTIME_PRECISION 1000000000
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+/* Return an extended time value that contains S seconds and NS
+   nanoseconds.  S and NS should be nonnegative; otherwise, integer
+   overflow can occur even if the result is in range.  */
+XTIME_INLINE xtime_t
+xtime_make (xtime_t s, long int ns)
+{
+  return XTIME_PRECISION * s + ns;
+}
+
+/* The following functions split an extended time value:
+   T = XTIME_PRECISION * xtime_sec (T) + xtime_nsec (T)
+   with  0 <= xtime_nsec (T) < XTIME_PRECISION.  */
+
+/* Return the number of seconds in T, which must be nonnegative.  */
+XTIME_INLINE xtime_t
+xtime_nonnegative_sec (xtime_t t)
+{
+  return t / XTIME_PRECISION;
+}
+
+/* Return the number of seconds in T.  */
+XTIME_INLINE xtime_t
+xtime_sec (xtime_t t)
+{
+  return (t + (t < 0)) / XTIME_PRECISION - (t < 0);
+}
+
+/* Return the number of nanoseconds in T, which must be nonnegative.  */
+XTIME_INLINE long int
+xtime_nonnegative_nsec (xtime_t t)
+{
+  return t % XTIME_PRECISION;
+}
+
+/* Return the number of nanoseconds in T.  */
+XTIME_INLINE long int
+xtime_nsec (xtime_t t)
+{
+  long int ns = t % XTIME_PRECISION;
+  if (ns < 0)
+    ns += XTIME_PRECISION;
+  return ns;
+}
+
+#ifdef  __cplusplus
+}
+#endif
+
+_GL_INLINE_HEADER_END
+
+#endif