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image/gif: fix buglet in graphics extension.

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need to ReadFull, not Read, to get extension data.

R=nigeltao
CC=golang-dev
https://golang.org/cl/4576043
This commit is contained in:
Rob Pike 2011-06-07 12:19:36 +00:00
parent 4881e7744a
commit 05348ab0c8
1 changed files with 3 additions and 3 deletions
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6
src/pkg/image/gif/reader.go
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@ -274,7 +274,7 @@ func (d *decoder) readExtension() os.Error {
return fmt.Errorf("gif: unknown extension 0x%.2x", extension) return fmt.Errorf("gif: unknown extension 0x%.2x", extension)
} }
if size > 0 { if size > 0 {
if _, err := d.r.Read(d.tmp[0:size]); err != nil { if _, err := io.ReadFull(d.r, d.tmp[0:size]); err != nil {
return err return err
} }
} }
@ -406,8 +406,8 @@ func DecodeAll(r io.Reader) (*GIF, os.Error) {
return gif, nil return gif, nil
} }
// DecodeConfig returns the color model and dimensions of a GIF image without // DecodeConfig returns the global color model and dimensions of a GIF image
// decoding the entire image. // without decoding the entire image.
func DecodeConfig(r io.Reader) (image.Config, os.Error) { func DecodeConfig(r io.Reader) (image.Config, os.Error) {
var d decoder var d decoder
if err := d.decode(r, true); err != nil { if err := d.decode(r, true); err != nil {