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Description: archive/tar: reuse temporary buffer in readHeader
Author: Cristian Staretu <unclejacksons@gmail.com>
Last-Update: 2014-07-03
Forwarded: not-needed
Origin: vendor, https://code.google.com/p/go/source/detail?r=17404efd6b02d4b3acd17070e3f89de97a145877
---
diff -r 837348e418f3 -r 17404efd6b02 src/pkg/archive/tar/reader.go
--- a/src/pkg/archive/tar/reader.go Thu Jul 03 09:40:53 2014 +1000
+++ b/src/pkg/archive/tar/reader.go Thu Jul 03 09:41:19 2014 +1000
@@ -29,10 +29,11 @@
// The Next method advances to the next file in the archive (including the first),
// and then it can be treated as an io.Reader to access the file's data.
type Reader struct {
- r io.Reader
- err error
- pad int64 // amount of padding (ignored) after current file entry
- curr numBytesReader // reader for current file entry
+ r io.Reader
+ err error
+ pad int64 // amount of padding (ignored) after current file entry
+ curr numBytesReader // reader for current file entry
+ hdrBuff [blockSize]byte // buffer to use in readHeader
}
// A numBytesReader is an io.Reader with a numBytes method, returning the number
@@ -426,7 +427,9 @@
}
func (tr *Reader) readHeader() *Header {
- header := make([]byte, blockSize)
+ header := tr.hdrBuff[:]
+ copy(header, zeroBlock)
+
if _, tr.err = io.ReadFull(tr.r, header); tr.err != nil {
return nil
}
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