Merge pull request #201 from Bytom/v0.1

[bytom/vapor.git] / vendor / github.com / multiformats / go-multihash / io.go

diff --git a/vendor/github.com/multiformats/go-multihash/io.go b/vendor/github.com/multiformats/go-multihash/io.go
deleted file mode 100644 (file)
index 4629016..0000000
--- a/vendor/github.com/multiformats/go-multihash/io.go
+++ /dev/null
@@ -1,103 +0,0 @@
-package multihash
-
-import (
-       "encoding/binary"
-       "errors"
-       "io"
-       "math"
-)
-
-// Reader is an io.Reader wrapper that exposes a function
-// to read a whole multihash, parse it, and return it.
-type Reader interface {
-       io.Reader
-
-       ReadMultihash() (Multihash, error)
-}
-
-// Writer is an io.Writer wrapper that exposes a function
-// to write a whole multihash.
-type Writer interface {
-       io.Writer
-
-       WriteMultihash(Multihash) error
-}
-
-// NewReader wraps an io.Reader with a multihash.Reader
-func NewReader(r io.Reader) Reader {
-       return &mhReader{r}
-}
-
-// NewWriter wraps an io.Writer with a multihash.Writer
-func NewWriter(w io.Writer) Writer {
-       return &mhWriter{w}
-}
-
-type mhReader struct {
-       r io.Reader
-}
-
-func (r *mhReader) Read(buf []byte) (n int, err error) {
-       return r.r.Read(buf)
-}
-
-func (r *mhReader) ReadByte() (byte, error) {
-       if br, ok := r.r.(io.ByteReader); ok {
-               return br.ReadByte()
-       }
-       var b [1]byte
-       n, err := r.r.Read(b[:])
-       if n == 1 {
-               return b[0], nil
-       }
-       if err == nil {
-               if n != 0 {
-                       panic("reader returned an invalid length")
-               }
-               err = io.ErrNoProgress
-       }
-       return 0, err
-}
-
-func (r *mhReader) ReadMultihash() (Multihash, error) {
-       code, err := binary.ReadUvarint(r)
-       if err != nil {
-               return nil, err
-       }
-
-       length, err := binary.ReadUvarint(r)
-       if err != nil {
-               return nil, err
-       }
-       if length > math.MaxInt32 {
-               return nil, errors.New("digest too long, supporting only <= 2^31-1")
-       }
-
-       pre := make([]byte, 2*binary.MaxVarintLen64)
-       spot := pre
-       n := binary.PutUvarint(spot, code)
-       spot = pre[n:]
-       n += binary.PutUvarint(spot, length)
-
-       buf := make([]byte, int(length)+n)
-       copy(buf, pre[:n])
-
-       if _, err := io.ReadFull(r.r, buf[n:]); err != nil {
-               return nil, err
-       }
-
-       return Cast(buf)
-}
-
-type mhWriter struct {
-       w io.Writer
-}
-
-func (w *mhWriter) Write(buf []byte) (n int, err error) {
-       return w.w.Write(buf)
-}
-
-func (w *mhWriter) WriteMultihash(m Multihash) error {
-       _, err := w.w.Write([]byte(m))
-       return err
-}