diff options
Diffstat (limited to 'src/pkg/compress/lzw/reader.go')
| -rw-r--r-- | src/pkg/compress/lzw/reader.go | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/src/pkg/compress/lzw/reader.go b/src/pkg/compress/lzw/reader.go index d418bc856..a1cd2abc0 100644 --- a/src/pkg/compress/lzw/reader.go +++ b/src/pkg/compress/lzw/reader.go @@ -165,16 +165,19 @@ func decode1(pw *io.PipeWriter, r io.ByteReader, read func(*decoder) (uint16, os if _, err := w.Write(buf[i:]); err != nil { return err } - // Save what the hi code expands to. - suffix[hi] = uint8(c) - prefix[hi] = last + if last != invalidCode { + // Save what the hi code expands to. + suffix[hi] = uint8(c) + prefix[hi] = last + } default: return os.NewError("lzw: invalid code") } last, hi = code, hi+1 - if hi == overflow { + if hi >= overflow { if d.width == maxWidth { - return os.NewError("lzw: missing clear code") + last = invalidCode + continue } d.width++ overflow <<= 1 |