diff options
Diffstat (limited to 'vendor/github.com/golang')
| -rw-r--r-- | vendor/github.com/golang/snappy/AUTHORS | 1 | ||||
| -rw-r--r-- | vendor/github.com/golang/snappy/CONTRIBUTORS | 1 | ||||
| -rw-r--r-- | vendor/github.com/golang/snappy/decode.go | 4 | ||||
| -rw-r--r-- | vendor/github.com/golang/snappy/decode_other.go | 22 | ||||
| -rw-r--r-- | vendor/github.com/golang/snappy/encode.go | 4 | ||||
| -rw-r--r-- | vendor/github.com/golang/snappy/go.mod | 1 |
6 files changed, 29 insertions, 4 deletions
diff --git a/vendor/github.com/golang/snappy/AUTHORS b/vendor/github.com/golang/snappy/AUTHORS index bcfa195..f10b49b 100644 --- a/vendor/github.com/golang/snappy/AUTHORS +++ b/vendor/github.com/golang/snappy/AUTHORS @@ -11,5 +11,6 @@ Damian Gryski <dgryski@gmail.com> Google Inc. Jan Mercl <0xjnml@gmail.com> +Klaus Post <klauspost@gmail.com> Rodolfo Carvalho <rhcarvalho@gmail.com> Sebastien Binet <seb.binet@gmail.com> diff --git a/vendor/github.com/golang/snappy/CONTRIBUTORS b/vendor/github.com/golang/snappy/CONTRIBUTORS index 931ae31..3bd40cf 100644 --- a/vendor/github.com/golang/snappy/CONTRIBUTORS +++ b/vendor/github.com/golang/snappy/CONTRIBUTORS @@ -29,6 +29,7 @@ Damian Gryski <dgryski@gmail.com> Jan Mercl <0xjnml@gmail.com> Kai Backman <kaib@golang.org> +Klaus Post <klauspost@gmail.com> Marc-Antoine Ruel <maruel@chromium.org> Nigel Tao <nigeltao@golang.org> Rob Pike <r@golang.org> diff --git a/vendor/github.com/golang/snappy/decode.go b/vendor/github.com/golang/snappy/decode.go index 72efb03..f1e04b1 100644 --- a/vendor/github.com/golang/snappy/decode.go +++ b/vendor/github.com/golang/snappy/decode.go @@ -52,6 +52,8 @@ const ( // Otherwise, a newly allocated slice will be returned. // // The dst and src must not overlap. It is valid to pass a nil dst. +// +// Decode handles the Snappy block format, not the Snappy stream format. func Decode(dst, src []byte) ([]byte, error) { dLen, s, err := decodedLen(src) if err != nil { @@ -83,6 +85,8 @@ func NewReader(r io.Reader) *Reader { } // Reader is an io.Reader that can read Snappy-compressed bytes. +// +// Reader handles the Snappy stream format, not the Snappy block format. type Reader struct { r io.Reader err error diff --git a/vendor/github.com/golang/snappy/decode_other.go b/vendor/github.com/golang/snappy/decode_other.go index 8c9f204..b88318e 100644 --- a/vendor/github.com/golang/snappy/decode_other.go +++ b/vendor/github.com/golang/snappy/decode_other.go @@ -85,14 +85,28 @@ func decode(dst, src []byte) int { if offset <= 0 || d < offset || length > len(dst)-d { return decodeErrCodeCorrupt } - // Copy from an earlier sub-slice of dst to a later sub-slice. Unlike - // the built-in copy function, this byte-by-byte copy always runs + // Copy from an earlier sub-slice of dst to a later sub-slice. + // If no overlap, use the built-in copy: + if offset >= length { + copy(dst[d:d+length], dst[d-offset:]) + d += length + continue + } + + // Unlike the built-in copy function, this byte-by-byte copy always runs // forwards, even if the slices overlap. Conceptually, this is: // // d += forwardCopy(dst[d:d+length], dst[d-offset:]) - for end := d + length; d != end; d++ { - dst[d] = dst[d-offset] + // + // We align the slices into a and b and show the compiler they are the same size. + // This allows the loop to run without bounds checks. + a := dst[d : d+length] + b := dst[d-offset:] + b = b[:len(a)] + for i := range a { + a[i] = b[i] } + d += length } if d != len(dst) { return decodeErrCodeCorrupt diff --git a/vendor/github.com/golang/snappy/encode.go b/vendor/github.com/golang/snappy/encode.go index 8d393e9..7f23657 100644 --- a/vendor/github.com/golang/snappy/encode.go +++ b/vendor/github.com/golang/snappy/encode.go @@ -15,6 +15,8 @@ import ( // Otherwise, a newly allocated slice will be returned. // // The dst and src must not overlap. It is valid to pass a nil dst. +// +// Encode handles the Snappy block format, not the Snappy stream format. func Encode(dst, src []byte) []byte { if n := MaxEncodedLen(len(src)); n < 0 { panic(ErrTooLarge) @@ -139,6 +141,8 @@ func NewBufferedWriter(w io.Writer) *Writer { } // Writer is an io.Writer that can write Snappy-compressed bytes. +// +// Writer handles the Snappy stream format, not the Snappy block format. type Writer struct { w io.Writer err error diff --git a/vendor/github.com/golang/snappy/go.mod b/vendor/github.com/golang/snappy/go.mod new file mode 100644 index 0000000..f6406bb --- /dev/null +++ b/vendor/github.com/golang/snappy/go.mod @@ -0,0 +1 @@ +module github.com/golang/snappy |