30 lines
629 B
Go
30 lines
629 B
Go
// Copyright (C) 2018 Storj Labs, Inc.
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// See LICENSE for copying information.
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package segments
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import (
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"io"
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)
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// SizedReader allows to check the total number of bytes read so far.
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type SizedReader struct {
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r io.Reader
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size int64
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}
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// SizeReader create a new instance of SizedReader.
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func SizeReader(r io.Reader) *SizedReader {
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return &SizedReader{r: r}
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}
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// Read implements io.Reader.Read
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func (r *SizedReader) Read(p []byte) (n int, err error) {
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n, err = r.r.Read(p)
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r.size += int64(n)
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return n, err
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}
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// Size returns the total number of bytes read so far.
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func (r *SizedReader) Size() int64 { return r.size }
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