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Update and refactor to ack Go Authors

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This commit is contained in:
Cameron Moore 2016-01-05 16:10:29 -06:00 committed by Bjørn Erik Pedersen
parent 6a23cd65e1
commit 4c596483e1
1 changed files with 16 additions and 6 deletions
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22
source/lazy_file_reader.go
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@ -1,4 +1,5 @@
// Copyright 2015 The Hugo Authors. All rights reserved.
// Portions Copyright 2009 The Go Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
@ -129,15 +130,24 @@ func (l *LazyFileReader) WriteTo(w io.Writer) (n int64, err error) {
return 0, nil
}
// following code is taken from io.Copy in 'io/io.go'
buf := make([]byte, 32*1024)
return l.copyBuffer(w, f, nil)
}
// copyBuffer is the actual implementation of Copy and CopyBuffer.
// If buf is nil, one is allocated.
//
// Most of this function is copied from the Go stdlib 'io/io.go'.
func (l *LazyFileReader) copyBuffer(dst io.Writer, src io.Reader, buf []byte) (written int64, err error) {
if buf == nil {
buf = make([]byte, 32*1024)
}
for {
nr, er := f.Read(buf)
nr, er := src.Read(buf)
if nr > 0 {
nw, ew := w.Write(buf[0:nr])
nw, ew := dst.Write(buf[0:nr])
if nw > 0 {
l.pos += int64(nw)
n += int64(nw)
written += int64(nw)
}
if ew != nil {
err = ew
@ -156,5 +166,5 @@ func (l *LazyFileReader) WriteTo(w io.Writer) (n int64, err error) {
break
}
}
return n, err
return written, err
}