Golang rlp.Stream類代碼示例

func (self *StorageBlock) DecodeRLP(s *rlp.Stream) error {
	var sb storageblock
	if err := s.Decode(&sb); err != nil {
		return err
	}
	self.header, self.uncles, self.transactions, self.Td = sb.Header, sb.Uncles, sb.Txs, sb.TD
	return nil
}

func (tx *Transaction) DecodeRLP(s *rlp.Stream) error {
	_, size, _ := s.Kind()
	err := s.Decode(&tx.data)
	if err == nil {
		tx.size.Store(common.StorageSize(rlp.ListSize(size)))
	}
	return err
}

func (self *Value) DecodeRLP(s *rlp.Stream) error {
	var v interface{}
	if err := s.Decode(&v); err != nil {
		return err
	}
	self.Val = v
	return nil
}

func (b *Block) DecodeRLP(s *rlp.Stream) error {
	var eb extblock
	_, size, _ := s.Kind()
	if err := s.Decode(&eb); err != nil {
		return err
	}
	b.header, b.uncles, b.transactions = eb.Header, eb.Uncles, eb.Txs
	b.size.Store(common.StorageSize(rlp.ListSize(size)))
	return nil
}

func (l *Log) DecodeRLP(s *rlp.Stream) error {
	var log struct {
		Address common.Address
		Topics  []common.Hash
		Data    []byte
	}
	if err := s.Decode(&log); err != nil {
		return err
	}
	l.Address, l.Topics, l.Data = log.Address, log.Topics, log.Data
	return nil
}

// DecodeRLP implements rlp.Decoder, and loads the consensus fields of a receipt
// from an RLP stream.
func (r *Receipt) DecodeRLP(s *rlp.Stream) error {
	var receipt struct {
		PostState         []byte
		CumulativeGasUsed *big.Int
		Bloom             Bloom
		Logs              vm.Logs
	}
	if err := s.Decode(&receipt); err != nil {
		return err
	}
	r.PostState, r.CumulativeGasUsed, r.Bloom, r.Logs = receipt.PostState, receipt.CumulativeGasUsed, receipt.Bloom, receipt.Logs
	return nil
}

func (self *Receipt) DecodeRLP(s *rlp.Stream) error {
	var r struct {
		PostState         []byte
		CumulativeGasUsed *big.Int
		Bloom             Bloom
		Logs              state.Logs
	}
	if err := s.Decode(&r); err != nil {
		return err
	}
	self.PostState, self.CumulativeGasUsed, self.Bloom, self.logs = r.PostState, r.CumulativeGasUsed, r.Bloom, r.Logs

	return nil
}

// DecodeRLP is a specialized decoder for hashOrNumber to decode the contents
// into either a block hash or a block number.
func (hn *hashOrNumber) DecodeRLP(s *rlp.Stream) error {
	_, size, _ := s.Kind()
	origin, err := s.Raw()
	if err == nil {
		switch {
		case size == 32:
			err = rlp.DecodeBytes(origin, &hn.Hash)
		case size <= 8:
			err = rlp.DecodeBytes(origin, &hn.Number)
		default:
			err = fmt.Errorf("invalid input size %d for origin", size)
		}
	}
	return err
}

// DecodeRLP decodes an Envelope from an RLP data stream.
func (self *Envelope) DecodeRLP(s *rlp.Stream) error {
	raw, err := s.Raw()
	if err != nil {
		return err
	}
	// The decoding of Envelope uses the struct fields but also needs
	// to compute the hash of the whole RLP-encoded envelope. This
	// type has the same structure as Envelope but is not an
	// rlp.Decoder so we can reuse the Envelope struct definition.
	type rlpenv Envelope
	if err := rlp.DecodeBytes(raw, (*rlpenv)(self)); err != nil {
		return err
	}
	self.hash = crypto.Sha3Hash(raw)
	return nil
}

func (self *Receipt) DecodeRLP(s *rlp.Stream) error {
	var r struct {
		PostState         []byte
		CumulativeGasUsed *big.Int
		Bloom             Bloom
		TxHash            common.Hash
		ContractAddress   common.Address
		Logs              state.Logs
		GasUsed           *big.Int
	}
	if err := s.Decode(&r); err != nil {
		return err
	}
	self.PostState, self.CumulativeGasUsed, self.Bloom, self.TxHash, self.ContractAddress, self.logs, self.GasUsed = r.PostState, r.CumulativeGasUsed, r.Bloom, r.TxHash, r.ContractAddress, r.Logs, r.GasUsed

	return nil
}

// checkDecodeFromJSON decodes from s guided by exp. exp drives the
// Stream by invoking decoding operations (Uint, Big, List, ...) based
// on the type of each value. The value decoded from the RLP stream
// must match the JSON value.
func checkDecodeFromJSON(s *rlp.Stream, exp interface{}) error {
	switch exp := exp.(type) {
	case uint64:
		i, err := s.Uint()
		if err != nil {
			return addStack("Uint", exp, err)
		}
		if i != exp {
			return addStack("Uint", exp, fmt.Errorf("result mismatch: got %d", i))
		}
	case *big.Int:
		big := new(big.Int)
		if err := s.Decode(&big); err != nil {
			return addStack("Big", exp, err)
		}
		if big.Cmp(exp) != 0 {
			return addStack("Big", exp, fmt.Errorf("result mismatch: got %d", big))
		}
	case []byte:
		b, err := s.Bytes()
		if err != nil {
			return addStack("Bytes", exp, err)
		}
		if !bytes.Equal(b, exp) {
			return addStack("Bytes", exp, fmt.Errorf("result mismatch: got %x", b))
		}
	case []interface{}:
		if _, err := s.List(); err != nil {
			return addStack("List", exp, err)
		}
		for i, v := range exp {
			if err := checkDecodeFromJSON(s, v); err != nil {
				return addStack(fmt.Sprintf("[%d]", i), exp, err)
			}
		}
		if err := s.ListEnd(); err != nil {
			return addStack("ListEnd", exp, err)
		}
	default:
		panic(fmt.Errorf("unhandled type: %T", exp))
	}
	return nil
}

func dump(s *rlp.Stream, depth int) error {
	kind, size, err := s.Kind()
	if err != nil {
		return err
	}
	switch kind {
	case rlp.Byte, rlp.String:
		str, err := s.Bytes()
		if err != nil {
			return err
		}
		if len(str) == 0 || !*noASCII && isASCII(str) {
			fmt.Printf("%s%q", ws(depth), str)
		} else {
			fmt.Printf("%s%x", ws(depth), str)
		}
	case rlp.List:
		s.List()
		defer s.ListEnd()
		if size == 0 {
			fmt.Print(ws(depth) + "[]")
		} else {
			fmt.Println(ws(depth) + "[")
			for i := 0; ; i++ {
				if i > 0 {
					fmt.Print(",\n")
				}
				if err := dump(s, depth+1); err == rlp.EOL {
					break
				} else if err != nil {
					return err
				}
			}
			fmt.Print(ws(depth) + "]")
		}
	}
	return nil
}