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gofmt: no need for lexical compare of src and res (optimization)

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R=r
CC=golang-dev
https://golang.org/cl/4130046
This commit is contained in:
Robert Griesemer 2011-02-04 15:36:32 -08:00
parent 5008c63e6e
commit eeafc06538
1 changed files with 6 additions and 5 deletions
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11
src/cmd/gofmt/gofmt.go
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@ -113,19 +113,20 @@ func processFile(f *os.File) os.Error {
simplify(file)
}
var res bytes.Buffer
_, err = (&printer.Config{printerMode, *tabWidth, nil}).Fprint(&res, fset, file)
var buf bytes.Buffer
_, err = (&printer.Config{printerMode, *tabWidth, nil}).Fprint(&buf, fset, file)
if err != nil {
return err
}
res := buf.Bytes()
if bytes.Compare(src, res.Bytes()) != 0 {
if !bytes.Equal(src, res) {
// formatting has changed
if *list {
fmt.Fprintln(os.Stdout, f.Name())
}
if *write {
err = ioutil.WriteFile(f.Name(), res.Bytes(), 0)
err = ioutil.WriteFile(f.Name(), res, 0)
if err != nil {
return err
}
@ -133,7 +134,7 @@ func processFile(f *os.File) os.Error {
}
if !*list && !*write {
_, err = os.Stdout.Write(res.Bytes())
_, err = os.Stdout.Write(res)
}
return err