From 5c9a759573d3e12c4d2e9b4edc1f112b8a228ede Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Wed, 12 Aug 2020 13:14:15 +0100
Subject: [PATCH] Add a class to represent times

Signed-off-by: David Howells <dhowells@redhat.com>
---
 kafs/Makefile |  3 ++-
 kafs/kafs.H   | 19 +++++++++++++++++++
 kafs/misc.C   | 43 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 64 insertions(+), 1 deletion(-)
 create mode 100644 kafs/misc.C

diff --git a/kafs/Makefile b/kafs/Makefile
index aa1ff17..3dca362 100644
--- a/kafs/Makefile
+++ b/kafs/Makefile
@@ -7,7 +7,8 @@ CORE_SRCS := \
 	kafs.C \
 	arg_completion.C \
 	arg_parse.C \
-	display_error.C
+	display_error.C \
+	misc.C
 
 BOS_SRCS := \
 	bos.C \
diff --git a/kafs/kafs.H b/kafs/kafs.H
index 0ae8b76..3011c18 100644
--- a/kafs/kafs.H
+++ b/kafs/kafs.H
@@ -23,6 +23,7 @@ extern "C" {
 namespace kafs {
 
 namespace afs {
+class opr_time;
 constexpr unsigned int FS_PORT		= 7000;	/* AFS file server port */
 constexpr unsigned int FS_SERVICE	= 1;	/* AFS File Service ID */
 }
@@ -34,6 +35,24 @@ enum Service {
 	service_yfs,
 };
 
+class Time {
+	struct timespec			ts;
+	bool				has_nsecs;
+public:
+	Time() {
+		ts.tv_sec = 0;
+		ts.tv_nsec = 0;
+		has_nsecs = false;
+	}
+	Time(time_t t) {
+		ts.tv_sec = t;
+		ts.tv_nsec = 0;
+		has_nsecs = false;
+	}
+	Time(const kafs::afs::opr_time &t);
+	inline time_t seconds() const { return ts.tv_sec; }
+};
+
 class Context : public rxrpc::refcount {
 public:
 	rxrpc::ref<rxrpc::Endpoint> endpoint;
diff --git a/kafs/misc.C b/kafs/misc.C
new file mode 100644
index 0000000..fc3a184
--- /dev/null
+++ b/kafs/misc.C
@@ -0,0 +1,43 @@
+/* Miscellaneous routines.
+ *
+ * Copyright (C) 2020 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#include "kafs.H"
+#include "afs_xg.H"
+
+/*
+ * Convert a signed 100ns-resolution 64-bit time into a kafs time.
+ */
+kafs::Time::Time(const kafs::afs::opr_time &yt)
+{
+	unsigned long long abs_t, div, rem, t = yt.time;
+
+	/*
+	 * Unfortunately can not use normal 64 bit division on 32 bit arch, but
+	 * the alternative, do_div, does not work with negative numbers so have
+	 * to special case them
+	 */
+	if (t < 0) {
+		abs_t = -t;
+		div = abs_t / 10000000;
+		rem = abs_t % 10000000;
+		ts.tv_sec = -(div * 100);
+		ts.tv_nsec = rem;
+	} else {
+		abs_t = t;
+		div = abs_t / 10000000;
+		rem = abs_t % 10000000;
+		ts.tv_sec = div * 100;
+		ts.tv_nsec = rem;
+	}
+
+	has_nsecs = true;
+}
+
-- 
2.49.0