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Update and refactor to ack Go Authors
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parent
6a23cd65e1
commit
4c596483e1
1 changed files with 16 additions and 6 deletions
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@ -1,4 +1,5 @@
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// Copyright 2015 The Hugo Authors. All rights reserved.
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// Portions Copyright 2009 The Go Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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@ -129,15 +130,24 @@ func (l *LazyFileReader) WriteTo(w io.Writer) (n int64, err error) {
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return 0, nil
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}
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// following code is taken from io.Copy in 'io/io.go'
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buf := make([]byte, 32*1024)
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return l.copyBuffer(w, f, nil)
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}
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// copyBuffer is the actual implementation of Copy and CopyBuffer.
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// If buf is nil, one is allocated.
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//
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// Most of this function is copied from the Go stdlib 'io/io.go'.
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func (l *LazyFileReader) copyBuffer(dst io.Writer, src io.Reader, buf []byte) (written int64, err error) {
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if buf == nil {
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buf = make([]byte, 32*1024)
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}
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for {
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nr, er := f.Read(buf)
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nr, er := src.Read(buf)
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if nr > 0 {
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nw, ew := w.Write(buf[0:nr])
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nw, ew := dst.Write(buf[0:nr])
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if nw > 0 {
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l.pos += int64(nw)
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n += int64(nw)
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written += int64(nw)
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}
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if ew != nil {
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err = ew
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@ -156,5 +166,5 @@ func (l *LazyFileReader) WriteTo(w io.Writer) (n int64, err error) {
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break
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}
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}
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return n, err
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return written, err
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}
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