1 files changed, 68 insertions, 0 deletions
diff --git a/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_tstamp.h b/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_tstamp.h
new file mode 100644
index 0000000..9a210a3
--- /dev/null
+++ b/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_tstamp.h
@@ -0,0 +1,68 @@
+/*
+ * ngtcp2
+ *
+ * Copyright (c) 2023 ngtcp2 contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGTCP2_TSTAMP_H
+#define NGTCP2_TSTAMP_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <ngtcp2/ngtcp2.h>
+
+/*
+ * ngtcp2_tstamp_elapsed returns nonzero if at least |d| has passed
+ * since |base|.  |ts| expresses a current time, and must not be
+ * UINT64_MAX.
+ *
+ * If |base| is UINT64_MAX, this function returns 0 because UINT64_MAX
+ * is an invalid timestamp.  Otherwise, if |base| + |d| >= UINT64_MAX,
+ * this function returns 0.
+ *
+ * !ngtcp2_tstamp_elapsed() == ngtcp2_tstamp_not_elapsed() does not
+ * hold when |base| is UINT64_MAX.  If you need nonzero if |base| is
+ * UINT64_MAX, use !ngtcp2_tstamp_elapsed.  Otherwise, use
+ * ngtcp2_tstamp_not_elapsed.
+ */
+static inline int ngtcp2_tstamp_elapsed(ngtcp2_tstamp base, ngtcp2_duration d,
+                                        ngtcp2_tstamp ts) {
+  return base != UINT64_MAX && base < UINT64_MAX - d && base + d <= ts;
+}
+
+/*
+ * ngtcp2_tstamp_not_elapsed returns nonzero if |d| has not passed
+ * since |base|.  |ts| expresses a current time, and must not be
+ * UINT64_MAX.
+ *
+ * If |base| is UINT64_MAX, this function returns 0 because UINT64_MAX
+ * is an invalid timestamp.  Otherwise, if |base| + |d| >= UINT64_MAX,
+ * this function returns nonzero.
+ */
+static inline int ngtcp2_tstamp_not_elapsed(ngtcp2_tstamp base,
+                                            ngtcp2_duration d,
+                                            ngtcp2_tstamp ts) {
+  return base != UINT64_MAX && (base >= UINT64_MAX - d || base + d > ts);
+}
+
+#endif /* NGTCP2_TSTAMP_H */