github.com/phillinzzz/newBsc@v1.1.6/rlp/unsafe.go (about)

     1  // Copyright 2021 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  // +build !nacl,!js,cgo
    18  
    19  package rlp
    20  
    21  import (
    22  	"reflect"
    23  	"unsafe"
    24  )
    25  
    26  // byteArrayBytes returns a slice of the byte array v.
    27  func byteArrayBytes(v reflect.Value) []byte {
    28  	len := v.Len()
    29  	var s []byte
    30  	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&s))
    31  	hdr.Data = v.UnsafeAddr()
    32  	hdr.Cap = len
    33  	hdr.Len = len
    34  	return s
    35  }