X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/4f4f6f5fe9367d5cd6c57070fd8a223efc87cb21..8a27fe370239ecb8e50d53f46b45ed61203a35ca:/services/keepstore/count.go

diff --git a/services/keepstore/count.go b/services/keepstore/count.go
index a9f74368b4..700ca19dec 100644
--- a/services/keepstore/count.go
+++ b/services/keepstore/count.go
@@ -1,4 +1,8 @@
-package main
+// Copyright (C) The Arvados Authors. All rights reserved.
+//
+// SPDX-License-Identifier: AGPL-3.0
+
+package keepstore
 
 import (
 	"io"
@@ -18,6 +22,10 @@ func NewCountingReader(r io.Reader, f func(uint64)) io.ReadCloser {
 	}
 }
 
+func NewCountingReaderAtSeeker(r readerAtSeeker, f func(uint64)) *countingReaderAtSeeker {
+	return &countingReaderAtSeeker{readerAtSeeker: r, counter: f}
+}
+
 type countingReadWriter struct {
 	reader  io.Reader
 	writer  io.Writer
@@ -42,3 +50,25 @@ func (crw *countingReadWriter) Close() error {
 	}
 	return nil
 }
+
+type readerAtSeeker interface {
+	io.ReadSeeker
+	io.ReaderAt
+}
+
+type countingReaderAtSeeker struct {
+	readerAtSeeker
+	counter func(uint64)
+}
+
+func (crw *countingReaderAtSeeker) Read(buf []byte) (int, error) {
+	n, err := crw.readerAtSeeker.Read(buf)
+	crw.counter(uint64(n))
+	return n, err
+}
+
+func (crw *countingReaderAtSeeker) ReadAt(buf []byte, off int64) (int, error) {
+	n, err := crw.readerAtSeeker.ReadAt(buf, off)
+	crw.counter(uint64(n))
+	return n, err
+}