github.com/codingfuture/orig-energi3@v0.8.4/swarm/storage/swarmhasher.go (about)

     1  // Copyright 2017 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package storage
    18  
    19  import (
    20  	"hash"
    21  )
    22  
    23  const (
    24  	BMTHash     = "BMT"
    25  	SHA3Hash    = "SHA3" // http://golang.org/pkg/hash/#Hash
    26  	DefaultHash = BMTHash
    27  )
    28  
    29  type SwarmHash interface {
    30  	hash.Hash
    31  	ResetWithLength([]byte)
    32  }
    33  
    34  type HashWithLength struct {
    35  	hash.Hash
    36  }
    37  
    38  func (h *HashWithLength) ResetWithLength(length []byte) {
    39  	h.Reset()
    40  	h.Write(length)
    41  }