From 762e4761cc4edd92108f6836ad1933c7158b8be8 Mon Sep 17 00:00:00 2001
From: gVisor bot <gvisor-bot@google.com>
Date: Tue, 11 Feb 2020 11:08:28 -0800
Subject: Move Align{Up,Down} into binary package.

PiperOrigin-RevId: 294477647
---
 pkg/binary/binary.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'pkg/binary/binary.go')

diff --git a/pkg/binary/binary.go b/pkg/binary/binary.go
index 631785f7b..25065aef9 100644
--- a/pkg/binary/binary.go
+++ b/pkg/binary/binary.go
@@ -254,3 +254,13 @@ func WriteUint64(w io.Writer, order binary.ByteOrder, num uint64) error {
 	_, err := w.Write(buf)
 	return err
 }
+
+// AlignUp rounds a length up to an alignment. align must be a power of 2.
+func AlignUp(length int, align uint) int {
+	return (length + int(align) - 1) & ^(int(align) - 1)
+}
+
+// AlignDown rounds a length down to an alignment. align must be a power of 2.
+func AlignDown(length int, align uint) int {
+	return length & ^(int(align) - 1)
+}
-- 
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